US20130095172A1 - Uses for and article of manufacture including her2 dimerization inhibitor pertuzumab - Google Patents

Uses for and article of manufacture including her2 dimerization inhibitor pertuzumab Download PDF

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Publication number
US20130095172A1
US20130095172A1 US13/649,591 US201213649591A US2013095172A1 US 20130095172 A1 US20130095172 A1 US 20130095172A1 US 201213649591 A US201213649591 A US 201213649591A US 2013095172 A1 US2013095172 A1 US 2013095172A1
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Prior art keywords
pertuzumab
trastuzumab
her2
patient
cancer
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US13/649,591
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Sreedhara Alavattam
Lukas C. Amler
Mark C. Benyunes
Emma L. Clark
Christina H. de Toledo Pelizon
Zephania W. Kwong Glover
Lada Mitchell
Jayantha Ratnayake
Graham A. Ross
Ru-Amir Walker
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Genentech Inc
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Genentech Inc
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Priority to US13/649,591 priority Critical patent/US20130095172A1/en
Application filed by Genentech Inc filed Critical Genentech Inc
Publication of US20130095172A1 publication Critical patent/US20130095172A1/en
Priority to US15/058,520 priority patent/US20160175438A1/en
Priority to US16/123,809 priority patent/US20190117769A1/en
Priority to US16/796,163 priority patent/US20200206348A1/en
Priority to US16/992,966 priority patent/US20210015919A1/en
Priority to US16/994,950 priority patent/US20200376120A1/en
Priority to US17/656,732 priority patent/US20220362379A1/en
Priority to US18/309,488 priority patent/US20230277664A1/en
Priority to US18/309,452 priority patent/US20230277663A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
    • A61K31/337—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having four-membered rings, e.g. taxol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
    • A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
    • A61K39/39558—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against tumor tissues, cells, antigens
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/32—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against translation products of oncogenes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
    • A61K2039/507—Comprising a combination of two or more separate antibodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/545—Medicinal preparations containing antigens or antibodies characterised by the dose, timing or administration schedule
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2300/00—Mixtures or combinations of active ingredients, wherein at least one active ingredient is fully defined in groups A61K31/00 - A61K41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered

Definitions

  • the present invention concerns uses for and articles of manufacture including Pertuzumab, a first-in-class HER2 dimerization inhibitor.
  • the invention concerns extending progression free survival in a HER2-positive breast cancer patient population; combining two HER2 antibodies to treat HER2-positive cancer without increasing cardiac toxicity; treating early-stage HER2-positive breast cancer; treating HER2-positive cancer by co-administering a mixture of Pertuzumab and Trastuzumab from the same intravenous bag; treating HER2-positive metastatic gastric cancer; treating HER2-positive breast cancer with Pertuzumab, Trastuzumab and Vinorelbine; treating HER2-positive breast cancer with Pertuzumab, Trastuzumab and aromatase inhibitor; and treating low HER3 ovarian, primary peritoneal, or fallopian tube cancer.
  • It also concerns an article of manufacture comprising a vial with Pertuzumab therein and a package insert providing safety and/or efficacy data thereon; a method of making the article of manufacture; and a method of ensuring safe and effective use of Pertuzumab related thereto.
  • the invention concerns an intravenous (IV) bag containing a stable mixture of Pertuzumab and Trastuzumab suitable for administration to a cancer patient.
  • IV intravenous
  • the receptor family includes four distinct members including epidermal growth factor receptor (EGFR, ErbB1, or HER1), HER2 (ErbB2 or p185 neu ), HER3 (ErbB3) and HER4 (ErbB4 or tyro2).
  • EGFR epidermal growth factor receptor
  • HER2 ErbB2 or p185 neu
  • HER3 ErbB3
  • HER4 ErbB4 or tyro2
  • a recombinant humanized version of the murine anti-HER2 antibody 4D5 (huMAb4D5-8, rhuMAb HER2, Trastuzumab or HERCEPTIN®; U.S. Pat. No. 5,821,337) is clinically active in patients with HER2-overexpressing metastatic breast cancers that have received extensive prior anti-cancer therapy (Baselga et al., J. Clin. Oncol. 14:737-744 (1996)).
  • Trastuzumab received marketing approval from the Food and Drug Administration Sep. 25, 1998 for the treatment of patients with metastatic breast cancer whose tumors overexpress the HER2 protein.
  • Trastuzumab is approved for use as a single agent or in combination with chemotherapy or hormone therapy in the metastatic setting, and as single agent or in combination with chemotherapy as adjuvant treatment for patients with early-stage HER2-positive breast cancer.
  • Trastuzumab-based therapy is now the recommended treatment for patients with HER2-positive early-stage breast cancer who do not have contraindications for its use (Herceptin® prescribing information; NCCN Guidelines, version 2.2011).
  • Trastuzumab plus Docetaxel is a registered standard of care in the first-line metastatic breast cancer (MBC) treatment setting (Slamon et al. N Engl J Med. 2001; 344(11):783-792.; Marty et al. J Clin Oncol. 2005; 23(19):4265-4274).
  • HER2 antibody Trastuzumab Patients treated with the HER2 antibody Trastuzumab are selected for therapy based on HER2 expression. See, for example, WO99/31140 (Paton et al.), US2003/0170234A1 (Hellmann, S.), and US2003/0147884 (Paton et al.); as well as WO01/89566, US2002/0064785, and US2003/0134344 (Mass et al.). See, also, U.S. Pat. No. 6,573,043, U.S. Pat. No.
  • Pertuzumab also known as recombinant humanized monoclonal antibody 2C4 (rhuMAb 2C4); Genentech, Inc, South San Francisco
  • HER dimerization inhibitors HDI
  • functions to inhibit the ability of HER2 to form active heterodimers or homodimers with other HER receptors such as EGFR/HER1, HER2, HER3 and HER4.
  • Pertuzumab blockade of the formation of HER2-HER 3 heterodimers in tumor cells has been demonstrated to inhibit critical cell signaling, which results in reduced tumor proliferation and survival (Agus et al. Cancer Cell 2:127-37 (2002)).
  • Pertuzumab has undergone testing as a single agent in the clinic with a phase Ia trial in patients with advanced cancers and phase II trials in patients with ovarian cancer and breast cancer as well as lung and prostate cancer.
  • Phase I study patients with incurable, locally advanced, recurrent or metastatic solid tumors that had progressed during or after standard therapy were treated with Pertuzumab given intravenously every 3 weeks.
  • Pertuzumab was generally well tolerated. Tumor regression was achieved in 3 of 20 patients evaluable for response. Two patients had confirmed partial responses. Stable disease lasting for more than 2.5 months was observed in 6 of 21 patients (Agus et al. Pro Am Soc Clin Oncol 22:192 (2003)).
  • Pertuzumab At doses of 2.0-15 mg/kg, the pharmacokinetics of Pertuzumab was linear, and mean clearance ranged from 2.69 to 3.74 mL/day/kg and the mean terminal elimination half-life ranged from 15.3 to 27.6 days. Antibodies to Pertuzumab were not detected (Allison et al. Pro Am Soc Clin Oncol 22:197 (2003)).
  • US 2006/0034842 describes methods for treating ErbB-expressing cancer with anti-ErbB2 antibody combinations.
  • US 2008/0102069 describes the use of Trastuzumab and Pertuzumab in the treatment of HER2-positive metastatic cancer, such as breast cancer.
  • Baselga et al., J Clin Oncol, 2007 ASCO Annual Meeting Proceedings Part I, Col. 25, No. 18S (June 20 Supplement), 2007:1004 report the treatment of patients with pre-treated HER2-positivebreast cancer, which has progressed during treatment with Trastuzumab, with a combination of Trastuzumab and Pertuzumab.
  • Pertuzumab has been evaluated in Phase II studies in combination with Trastuzumab in patients with HER2-positive metastatic breast cancer who have previously received Trastuzumab for metastatic disease.
  • Patent Publications related to HER2 antibodies include: U.S. Pat. Nos. 5,677,171; 5,720,937; 5,720,954; 5,725,856; 5,770,195; 5,772,997; 6,165,464; 6,387,371; 6,399,063; 6,015,567; 6,333,169; 4,968,603; 5,821,337; 6,054,297; 6,407,213; 6,639,055;6,719,971; 6,800,738; 8,075,890; 5,648,237; 7,018,809; 6,267,958; 6,685,940; 6,821,515; 7,060,268; 7,682,609; 7,371,376; 6,127,526; 6,333,398; 6,797,814; 6,339,142; 6,417,335; 6,489,447; 7,074,404; 7,531,645; 7,846,441; 7,892,549; 8,075,89
  • the invention concerns a method for extending progression free survival in a HER2-positive breast cancer patient population by 6 months or more comprising administering Pertuzumab, Trastuzumab and chemotherapy (e.g. taxane, such as Docetaxel) to the patients in the population.
  • chemotherapy e.g. taxane, such as Docetaxel
  • the method results in an objective response rate of 80% or more in the patients in the population.
  • the breast cancer is optionally metastatic or locally recurrent, unresectable breast cancer, or de novo Stage IV disease.
  • the patients in the population have not received previous treatment or have relapsed after adjuvant therapy, have a left ventricular ejection fraction (LVEF) of ⁇ 50% at baseline, and/or have an Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or 1.
  • LVEF left ventricular ejection fraction
  • ECOG PS Eastern Cooperative Oncology Group performance status
  • the HER2-positive breast cancer is defined as immunohistochemistry (IHC) 3+ and/or fluorescence in situ hybridization (FISH) amplification ratio ⁇ 2.0.
  • the method reduces the risk of death by about 34% or more relative to a patient treated with Trastuzumab and the chemotherapy.
  • the invention concerns a method of combining two HER2 antibodies to treat HER2-positive cancer without increasing cardiac toxicity in a HER2-positive cancer patient population, comprising administering Pertuzumab, Trastuzumab, and chemotherapy to the patients in the population.
  • cardiac toxicity in the patient population is monitored for incidence of symptomatic left ventricular systolic dysfunction (LVSD) or congestive heart failure (CHF), or for decrease in left ventricular ejection fraction (LVEF).
  • LVSD left ventricular systolic dysfunction
  • CHF congestive heart failure
  • LVEF left ventricular ejection fraction
  • the HER2-positive cancer is optionally, breast cancer, for example metastatic or locally recurrent, unresectable breast cancer, or de novo Stage IV disease.
  • the invention concerns an article of manufacture comprising a vial with Pertuzumab therein and a package insert, wherein the package insert provides the safety data in Table 3 or Table 4 and/or the efficacy data in Table 2, Table 5, FIG. 8 , or FIG. 10 .
  • the invention additionally concerns a method for making an article of manufacture comprising packaging together a vial with Pertuzumab therein and a package insert, wherein the package insert provides the safety data in Table 3 or Table 4 and/or the efficacy data in Table 2, Table 5, FIG. 8 , or FIG. 10 .
  • the invention concerns a method of ensuring safe and effective use of Pertuzumab comprising packaging together a vial with Pertuzumab therein and a package insert, wherein the package insert provides the safety data in Table 3 or Table 4 and/or the efficacy data in Table 2, Table 5, FIG. 8 , or FIG. 10 .
  • the article of manufacture comprises a single-dose vial containing about 420 mg of Pertuzumab.
  • the package insert further comprises the warning box in Example 4.
  • the package insert further provides the Overall Survival (OS) efficacy data in Example 9 or Table 14.
  • OS Overall Survival
  • the invention concerns a method of treating early-stage HER2-positive breast cancer comprising administering Pertuzumab, Trastuzumab, and chemotherapy to a patient with the breast cancer, wherein the chemotherapy comprises anthracycline-based chemotherapy (for example, 5-FU, epirubicin, and cyclophosphamide (FEC)), or carboplatin-based chemotherapy (for example, Docetaxel and Carboplatin).
  • the chemotherapy comprises anthracycline-based chemotherapy (for example, 5-FU, epirubicin, and cyclophosphamide (FEC)), or carboplatin-based chemotherapy (for example, Docetaxel and Carboplatin).
  • FEC cyclophosphamide
  • carboplatin-based chemotherapy for example, Docetaxel and Carboplatin.
  • Pertuzumab is administered concurrently with the anthracycline-based chemotherapy or the carboplatin-based chemotherapy.
  • Pertuzumab administration does not increase cardiac
  • the invention further concerns a method of treating HER2-positive cancer in a patient comprising co-administering a mixture of Pertuzumab and Trastuzumab from the same intravenous bag to the patient.
  • Such method optionally further comprises administering chemotherapy to the patient.
  • the invention provides an intravenous (IV) bag containing a stable mixture of Pertuzumab and Trastuzumab suitable for administration to a cancer patient.
  • the mixture is optionally in saline solution; e.g. comprising about 0.9% NaCl or about 0.45% NaCl.
  • the IV bag is optionally a 250 mL 0.9% saline polyolefin or polyvinyl chloride infusion bag.
  • the IV bag which contains a mixture of about 420 mg or of about 840 mg of Pertuzumab and from about 200 mg to about 1000 mg of Trastuzumab.
  • the mixture is stable for up to 24 hours at 5° C. or 30° C.
  • Stability of the mixture can be evaluated by one or more assays selected from: color, appearance and clarity (CAC), concentration and turbidity analysis, particulate analysis, size exclusion chromatography (SEC), ion-exchange chromatography (IEC), capillary zone electrophoresis (CZE), image capillary isoelectric focusing (iCIEF), or potency assay.
  • assays selected from: color, appearance and clarity (CAC), concentration and turbidity analysis, particulate analysis, size exclusion chromatography (SEC), ion-exchange chromatography (IEC), capillary zone electrophoresis (CZE), image capillary isoelectric focusing (iCIEF), or potency assay.
  • the present invention provides a new treatment regimen for gastric cancer.
  • the present invention concerns the treatment of HER2-positivegastric cancer in human subjects with a combination of Trastuzumab, Pertuzumab and at least one chemotherapy.
  • the invention concerns a method of treating HER2-positive gastric cancer in a human subject, comprising administering to the subject Pertuzumab, Trastuzumab, and a chemotherapy.
  • the invention concerns a method of treating gastric cancer in a human subject comprising administering Pertuzumab to the subject with gastric cancer, wherein Pertuzumab is administered at a dose of 840 mg in all treatment cycles.
  • the invention concerns a method of improving survival in a human subject with HER2-positive gastric cancer, comprising administering to the subject Pertuzumab, Trastuzumab, and a chemotherapy.
  • the invention concerns Pertuzumab for use in the treatment of HER2-positive gastric cancer in a human subject in combination with Trastuzumab and a chemotherapy.
  • the invention concerns the use of Pertuzumab in the preparation of a medicament for the treatment of HER2-positive gastric cancer, wherein the treatment comprises administration of Pertuzumab in combination with Trastuzumab and a chemotherapy.
  • the invention concerns the use of Trastuzumab in the preparation of a medicament for the treatment of HER2-positive gastric cancer, wherein the treatment comprises administration of Trastuzumab in combination with Pertuzumab and a chemotherapy.
  • the invention concerns a kit comprising a container comprising Pertuzumab and instructions for administration of the Pertuzumab to treat HER2-positive gastric cancer in a subject in combination with Trastuzumab and a chemotherapy.
  • the invention concerns a kit comprising a container comprising Trastuzumab and instructions for administration of the Trastuzumab to treat HER2-positivegastric cancer in a subject in combination with Pertuzumab and a chemotherapy.
  • the gastric cancer can, for example, be non-resectable locally advanced gastric cancer, or metastatic gastric cancer, or advanced, post-operatively recurrent gastric cancer, which may not be amenable to curative therapy by known methods.
  • the gastric cancer includes adenocarcinoma of the stomach or gastroesophageal junction.
  • the patient did not receive prior anti-cancer treatment for metastatic gastric cancer.
  • the chemotherapy comprises administration of a platin and/or fluoropyrimidine.
  • the platin is cisplatin.
  • the fluoropyrimidine comprises capecitabine and/or 5-fluorouracil (5-FU).
  • the patient's HER2-positive status may, for example, be IHC 3+ or IHC 2+/ISH+.
  • the treatment improves survival, including overall survival (OS) and/or progression free survival (PFS) and/or response rate (RR).
  • OS overall survival
  • PFS progression free survival
  • RR response rate
  • the patient has an ECOG PS of 0-1.
  • treatment cycles are generally separated from each other by four weeks or less, or by three weeks or less, or by two weeks or less, or by one week or less.
  • the invention concerns a method of treating HER2-positive non-resectable or metastatic adenocarcinoma of the stomach or gastroesophageal junction in a human patient who did not receive prior chemotherapy for metastatic disease, except prior adjuvant or neoadjuvant therapy completed more than six months before the current treatment, comprising administering Pertuzumab, Trastuzumab, cisplatin, and capecitabine and/or fluorouracil (5-FU) to the patient in an amount to improve progression free survival (PFS) and/or overall survival (OS), wherein the patient has an ECOG PS of 0-1.
  • PFS progression free survival
  • OS overall survival
  • the patient did not receive prior treatment with a platin.
  • the invention concerns a method of improving progression free survival in a patient with HER2-positive non-resectable or metastatic adenocarcinoma of the stomach or gastroesophageal junction comprising administering Pertuzumab to the patient in combination with Trastuzumab and chemotherapy.
  • the invention concerns a method of treating HER2-positive breast cancer in a patient comprising administering Pertuzumab, Trastuzumab and vinorelbine to the patient.
  • Pertuzumab and Trastuzumab are co-administered to the patient from a single intravenous bag.
  • the breast cancer is optionally metastatic or locally advanced.
  • the patient has not previously received systemic non-hormonal anticancer therapy in the metastatic setting.
  • the invention concerns a method of treating HER2-positive breast cancer in a patient comprising administering Pertuzumab, Trastuzumab, and aromatase inhibitor (e.g. anastrazole or letrozole) to the patient.
  • the breast cancer is hormone receptor-positive advanced breast cancer, wherein the hormone receptor is estrogen receptor (ER) and/or progesterone receptor (PgR), for example.
  • ER estrogen receptor
  • PgR progesterone receptor
  • patient herein optionally receives induction chemotherapy (e.g. comprising taxane).
  • the invention concerns a method of treating a cancer patient comprising administering to the patient an initial dose of 840 mg of Pertuzumab followed every 3 weeks thereafter by a dose of 420 mg of Pertuzumab, and further comprising re-administering an 840 mg dose of Pertuzumab to the patient if the time between two sequential 420 mg doses is 6 weeks or more.
  • the method further comprises administering 420 mg of Pertuzumab every 3 weeks after the re-administered 840 mg dose.
  • the cancer patient has HER2-positive breast cancer.
  • the invention concerns a method for treating HER2-positive metastatic or locally recurrent breast cancer in a patient comprising administering Pertuzumab, Trastuzumab and taxoid (e.g. Docetaxel, Paclitaxel, or nab-paclitaxel) to the patient, wherein the patient has been previously treated with a Trastuzumab and/or lapatinib as adjuvant or neoadjuvant therapy.
  • Pertuzumab, Trastuzumab and taxoid e.g. Docetaxel, Paclitaxel, or nab-paclitaxel
  • the invention concerns a method for treating low HER3 ovarian, primary peritoneal, or fallopian tube cancer in a patient comprising administering Pertuzumab and chemotherapy the patient, wherein the chemotherapy comprises taxoid (e.g. paclitaxel) or topotecan.
  • Pertuzumab comprises taxoid (e.g. paclitaxel) or topotecan.
  • the invention concerns a method for treating low HER3 ovarian, primary peritoneal, or fallopian tube cancer in a patient comprising administering Pertuzumab and chemotherapy to the patient, wherein the low HER3 cancer expresses HER3 mRNA at a concentration ratio equal or lower than about 2.81 as assessed by polymerase chain reaction (PCR).
  • PCR polymerase chain reaction
  • the chemotherapy comprises gemcitabine, carboplatin, paclitaxel, docetaxel, topotecan, or pegylated liposomal doxorubicin (PLD).
  • the chemotherapy comprises paclitaxel or topotecan.
  • the cancer is epithelial ovarian cancer that is platinum-resistant or platinum-refractory.
  • FIG. 1 provides a schematic of the HER2 protein structure, and amino acid sequences for Domains I-IV (SEQ ID Nos. 1-4, respectively) of the extracellular domain thereof.
  • FIGS. 2A and 2B depict alignments of the amino acid sequences of the variable light (V L ) ( FIG. 2A ) and variable heavy (V H ) ( FIG. 2B ) domains of murine monoclonal antibody 2C4 (SEQ ID Nos. 5 and 6, respectively); V L and V H domains of variant 574/Pertuzumab (SEQ ID Nos. 7 and 8, respectively), and human V L and V H consensus frameworks (hum id, light kappa subgroup I; humIII, heavy subgroup III) (SEQ ID Nos. 9 and 10, respectively).
  • CDRs Complementarity Determining Regions
  • FIGS. 3A and 3B show the amino acid sequences of Pertuzumab light chain ( FIG. 3A ; SEQ ID NO. 11) and heavy chain ( FIG. 3B ; SEQ ID No. 12). CDRs are shown in bold. Calculated molecular mass of the light chain and heavy chain are 23,526.22 Da and 49,216.56 Da (cysteines in reduced form). The carbohydrate moiety is attached to Asn 299 of the heavy chain.
  • FIGS. 4A and 4B show the amino acid sequences of Trastuzumab light chain ( FIG. 4A ; SEQ ID NO. 13) and heavy chain ( FIG. 4B ; SEQ ID NO. 14), respectively. Boundaries of the variable light and variable heavy domains are indicated by arrows.
  • FIGS. 5A and 5B depict a variant Pertuzumab light chain sequence ( FIG. 5A ; SEQ ID NO. 15) and a variant Pertuzumab heavy chain sequence ( FIG. 5B ; SEQ ID NO. 16), respectively.
  • FIG. 6 shows the study schema in Example 1.
  • ECOG Eastern Cooperative Oncology Group
  • PD progressive disease.
  • Trastuzumab, Pertuzumab, and Cisplatin are administered by IV infusion on Day 1 of each 3-week cycle.
  • Capecitabine is administered orally twice daily, from the evening of Day 1 to the morning of Day 15 of each 3-week cycle.
  • HER2-positive tumor defined as either IHC 3+ or IHC 2+ in combination with ISH+ (i.e., IHC 3+/ISH+ or ICH 2+/ISH+);
  • ISH+ i.e., IHC 3+/ISH+ or ICH 2+/ISH+
  • trastuzumab at a loading dose of 8 mg/kg for Cycle 1 and a dose of 6 mg/kg for subsequent cycles
  • Pertuzumab on Day 1 of each cycle at a loading dose of 840 mg for Cycle 1 and a dose of 420 mg for Cycles 2-6.
  • FIG. 7 depicts enrollment, intent-to-treat and safety populations, and patient withdrawals in the study in Example 3.
  • FIG. 8 is a Kaplan-Meier Curve of Progression-Free Survival (PFS) as assessed by an Independent Review Facility (IRF) for the study in Example 3.
  • PFS Progression-Free Survival
  • FIG. 9 depicts PFS by Patient Subgroup for the study in Example 3.
  • FIG. 10 depicts overall survival for the study in Example 3.
  • FIG. 11 is an overview of the dosing schedule in HER2-positive, neoadjuvant breast cancer, patients with low cardiac risk factors in Example 5. Additional radiotherapy, hormonal therapy and chemotherapy post surgery and during adjuvant Trastuzumab treatment were allowed if considered necessary by the investigator.
  • FIG. 12 depicts mean change in LVEF (central readings) for the study in Example 5.
  • FIG. 13 shows pathological complete response (pCR) for the study in Example 5.
  • FIG. 14 depicts pathological complete response by hormone receptor status in the Example 5 study.
  • FIG. 24 depicts Pertuzumab SEC profile of Pertuzumab/Trastuzumab mixture (1560 mg) in 0.9% saline IV infusion bags (1) PO 5° C. T0; (2) PO 5° C. T24 hrs; (3) PO 30° C. T0; (4) PO 30° C. T24 hrs; (5) PVC 5° C. T0; (6) PVC 5° C. T24 hrs; (7) PVC 30° C. T0; (8) PVC 30° C. T24 hrs. Expanded view; full view (inset).
  • FIG. 25 shows Trastuzumab SEC profile of Pertuzumab/Trastuzumab mixture (1560 mg) in 0.9% saline IV infusion bags (1) PO 5° C. T0; (2) PO 5° C. T24 hrs; (3) PO 30° C. T0; (4) PO 30° C. T24 hrs; (5) PVC 5° C. T0; (6) PVC 5° C. T24 hrs; (7) PVC 30° C. T0; (8) PVC 30° C. T24 hrs. Expanded view; full view (inset).
  • FIG. 26 shows Pertuzumab IEC (Pertuzumab-fast) profile of Pertuzumab/Trastuzumab mixture (1560 mg) in 0.9% saline IV infusion bags (1) PO 5° C. T0; (2) PO 5° C. T24 hrs; (3) PO 30° C. T0; (4) PO 30° C. T24 hrs; (5) PVC 5° C. T0; (6) PVC 5° C. T24 hrs; (7) PVC 30° C. T0; (8) PVC 30° C. T24 hrs. Full view.
  • Pertuzumab IEC Pertuzumab-fast profile of Pertuzumab/Trastuzumab mixture (1560 mg) in 0.9% saline IV infusion bags
  • FIG. 27 shows Trastuzumab IEC profile of Pertuzumab/Trastuzumab mixture (1560 mg) in 0.9% saline IV infusion bags (1) PO 5° C. T0; (2) PO 5° C. T24 hrs; (3) PO 30° C. T0; (4) PO 30° C. T24 hrs; (5) PVC 5° C. T0; (6) PVC 5° C. T24 hrs; (7) PVC 30° C. T0; (8) PVC 30° C. T24 hrs. Full view.
  • FIG. 28 depicts study schema for Example 7.
  • FIG. 29 shows study design for Example 8.
  • FIG. 30 shows study design for Part 1 of Example 11.
  • FIG. 31 shows study design for Part 2 of Example 11.
  • FIG. 32 shows the samples taken and time points for the phase IIa gastric cancer (GC) study in Example 1.
  • GC gastric cancer
  • FIG. 33 shows the demographics of the patient population in the two arms of the GC study, treated with 420 mg (Arm A) or 840 mg (Arm B) of Pertuzumab.
  • FIG. 34 shows the GC history of the patients in Arms A and B, respectively.
  • FIG. 35 shows the GC patient disposition in Arms A and B, respectively.
  • FIG. 36 shows the Overall Response Rate in Arms A and B, respectively, of the GC study.
  • FIG. 37 shows the results of Pertuzumab Day 42 concentration assessment in gastric cancer (GC) versus metastatic breast cancer (MBC).
  • Day 42 Ctrough is ⁇ 37% lower in GC (JOSHUA 840/420 mg) vs. MBC (CLEO 840/420 mg).
  • JOSHUA 840/420 mg and 840/840 mg regimens both result in Day 42 Ctrough ⁇ 20 ⁇ g/mL in 90% of patients.
  • JOSHUA 840/840 mg regimen results in Day 42 Ctrough in GC comparable to that observed in MBC(CLEO 840/420 mg)
  • chemotherapy refers to treatment comprising the administration of a chemotherapy, as defined hereinbelow.
  • “Survival” refers to the patient remaining alive, and includes overall survival as well as progression free survival.
  • OS “Overall survival” or “OS” refers to the patient remaining alive for a defined period of time, such as 1 year, 5 years, etc from the time of diagnosis or treatment. For the purposes of the clinical trial described in the example, overall survival (OS) is defined as the time from the date of randomization of patient population to the date of death from any cause.
  • progression free survival refers to the patient remaining alive, without the cancer progressing or getting worse.
  • progression free survival is defined as the time from randomization of study population to the first documented progressive disease, or unmanageable toxicity, or death from any cause, whichever occurs first.
  • Disease progression can be documented by any clinically accepted methods, such as, for example, radiographical progressive disease, as determined by Response Evaluation Criteria in Solid Tumors (RECIST) (Therasse et al., J Natl Ca Inst 2000; 92(3):205-216), carcinomatous meningitis diagnosed by cytologic evaluation of cerebral spinal fluid, and/or medical photography to monitor chest wall recurrences of subcutaneous lesions.
  • RECIST Response Evaluation Criteria in Solid Tumors
  • extending survival is meant increasing overall or progression free survival in a patient treated in accordance with the present invention relative to an untreated patient and/or relative to a patient treated with one or more approved anti-tumor agents, but not receiving treatment in accordance with the present invention.
  • “extending survival” means extending progression-free survival (PFS) and/or overall survival (OS) of cancer patients receiving the combination therapy of the present invention (e.g. treatment with a combination of Pertuzumab, Trastuzumab and a chemotherapy) relative to patients treated with Trastuzumab and the chemotherapy only.
  • PFS progression-free survival
  • OS overall survival
  • “extending survival” means extending progression-free survival (PFS) and/or overall survival (OS) of cancer patients receiving the combination therapy of the present invention (e.g. treatment with a combination of Pertuzumab, Trastuzumab and a chemotherapy) relative to patients treated with Pertuzumab and the chemotherapy only.
  • PFS progression-free survival
  • OS overall survival
  • An “objective response” refers to a measurable response, including complete response (CR) or partial response (PR).
  • Partial response refers to a decrease in the size of one or more tumors or lesions, or in the extent of cancer in the body, in response to treatment.
  • a “HER receptor” is a receptor protein tyrosine kinase which belongs to the HER receptor family and includes EGFR, HER2, HER3 and HER4 receptors.
  • the HER receptor will generally comprise an extracellular domain, which may bind an HER ligand and/or dimerize with another HER receptor molecule; a lipophilic transmembrane domain; a conserved intracellular tyrosine kinase domain; and a carboxyl-terminal signaling domain harboring several tyrosine residues which can be phosphorylated.
  • the HER receptor may be a “native sequence” HER receptor or an “amino acid sequence variant” thereof.
  • the HER receptor is native sequence human HER receptor.
  • ErbB2 and HER2 are used interchangeably herein and refer to human HER2 protein described, for example, in Semba et al., PNAS ( USA ) 82:6497-6501 (1985) and Yamamoto et al. Nature 319:230-234 (1986) (Genebank accession number X03363).
  • the term “erbB2” refers to the gene encoding human ErbB2 and “neu” refers to the gene encoding rat p185 neu .
  • Preferred HER2 is native sequence human HER2.
  • HER2 extracellular domain or “HER2ECD” refers to a domain of HER2 that is outside of a cell, either anchored to a cell membrane, or in circulation, including fragments thereof.
  • the amino acid sequence of HER2 is shown in FIG. 1 .
  • the extracellular domain of HER2 may comprise four domains: “Domain I” (amino acid residues from about 1-195; SEQ ID NO:1), “Domain II” (amino acid residues from about 196-319; SEQ ID NO:2), “Domain III” (amino acid residues from about 320-488: SEQ ID NO:3), and “Domain IV” (amino acid residues from about 489-630; SEQ ID NO:4) (residue numbering without signal peptide).
  • Domain I amino acid residues from about 1-195; SEQ ID NO:1
  • Domain II amino acid residues from about 196-319; SEQ ID NO:2
  • Domain III amino acid residues from about 320-488: SEQ ID NO:3
  • Domain IV amino acid residues from about 489-630; SEQ ID NO:4
  • HER3 or “ErbB3” herein refer to the receptor as disclosed, for example, in U.S. Pat. Nos. 5,183,884 and 5,480,968 as well as Kraus et al. PNAS ( USA ) 86:9193-9197 (1989).
  • a “low HER3” cancer is one which expresses HER3 at a level less then the median level for HER3 expression in the cancer type.
  • the low HER3 cancer is epithelial ovarian, peritoneal, or fallopian tube cancer.
  • HER3DNA, protein, and/or mRNA level in the cancer can be evaluated to determine whether the cancer is a low HER3 cancer. See, for example, U.S. Pat. No. 7,981,418 for additional information about low HER3 cancer.
  • a HER3 mRNA expression assay is performed in order to determine that the cancer is a low HER3 cancer.
  • HER3 mRNA level in the cancer is evaluated, e.g.
  • PCR polymerase chain reaction
  • qRT-PCR quantitative reverse transcription PCR
  • the cancer expresses HER3 at a concentration ratio equal or lower than about 2.81 as assessed qRT-PCR, e.g. using a a COBAS z480® instrument.
  • a “HER dimer” herein is a noncovalently associated dimer comprising at least two HER receptors. Such complexes may form when a cell expressing two or more HER receptors is exposed to an HER ligand and can be isolated by immunoprecipitation and analyzed by SDS-PAGE as described in Sliwkowski et al., J. Biol. Chem., 269(20):14661-14665 (1994), for example. Other proteins, such as a cytokine receptor subunit (e.g. gp130) may be associated with the dimer.
  • the HER dimer comprises HER2.
  • HER heterodimer herein is a noncovalently associated heterodimer comprising at least two different HER receptors, such as EGFR-HER2, HER2-HER3 or HER2-HER4 heterodimers.
  • HER antibody is an antibody that binds to a HER receptor, optionally, the HER antibody further interferes with HER activation or function. Preferably, the HER antibody binds to the HER2 receptor.
  • HER2 antibodies of interest herein are Pertuzumab and Trastuzumab.
  • HER activation refers to activation, or phosphorylation, of any one or more HER receptors. Generally, HER activation results in signal transduction (e.g. that caused by an intracellular kinase domain of a HER receptor phosphorylating tyrosine residues in the HER receptor or a substrate polypeptide). HER activation may be mediated by HER ligand binding to a HER dimer comprising the HER receptor of interest.
  • HER ligand binding to a HER dimer may activate a kinase domain of one or more of the HER receptors in the dimer and thereby results in phosphorylation of tyrosine residues in one or more of the HER receptors and/or phosphorylation of tyrosine residues in additional substrate polypeptides(s), such as Akt or MAPK intracellular kinases.
  • Phosphorylation refers to the addition of one or more phosphate group(s) to a protein, such as a HER receptor, or substrate thereof.
  • an antibody which “inhibits HER dimerization” is an antibody which inhibits, or interferes with, formation of a HER dimer. Preferably, such an antibody binds to HER2 at the heterodimeric binding site thereof.
  • the most preferred dimerization inhibiting antibody herein is Pertuzumab or MAb 2C4.
  • Other examples of antibodies which inhibit HER dimerization include antibodies which bind to EGFR and inhibit dimerization thereof with one or more other HER receptors (for example EGFR monoclonal antibody 806, MAb 806, which binds to activated or “untethered” EGFR; see Johns et al., J. Biol. Chem. 279(29):30375-30384 (2004)); antibodies which bind to HER3 and inhibit dimerization thereof with one or more other HER receptors; and antibodies which bind to HER4 and inhibit dimerization thereof with one or more other HER receptors.
  • HER2 dimerization inhibitor is an agent that inhibits formation of a dimer or heterodimer comprising HER2.
  • a “heterodimeric binding site” on HER2 refers to a region in the extracellular domain of HER2 that contacts, or interfaces with, a region in the extracellular domain of EGFR, HER3 or HER4 upon formation of a dimer therewith. The region is found in Domain II of HER2 (SEQ ID NO: 15). Franklin et al. Cancer Cell 5:317-328 (2004).
  • an antibody that “binds to domain II” of HER2 binds to residues in domain II (SEQ ID NO: 2) and optionally residues in other domain(s) of HER2, such as domains I and 111 (SEQ ID NOs: 1 and 3, respectively).
  • the antibody that binds to domain II binds to the junction between domains I, II and III of HER2.
  • Pertuzumab is an intact antibody, it preferably comprises an IgG1 antibody; in one embodiment comprising the light chain amino acid sequence in SEQ ID NO: 11 or 15, and heavy chain amino acid sequence in SEQ ID NO: 12 or 16.
  • the antibody is optionally produced by recombinant Chinese Hamster Ovary (CHO) cells.
  • the terms “Pertuzumab” and “rhuMAb 2C4” herein cover biosimilar versions of the drug with the United States Adopted Name (USAN) or International Nonproprietary Name (INN): Pertuzumab.
  • Trastuzumab and rhuMAb4D5′′ which are used interchangeably, refer to an antibody comprising the variable light and variable heavy amino acid sequences from within SEQ ID Nos: 13 and 14, respectively. Where Trastuzumab is an intact antibody, it preferably comprises an IgG1 antibody; in one embodiment comprising the light chain amino acid sequence of SEQ ID NO: 13 and the heavy chain amino acid sequence of SEQ ID NO: 14.
  • the antibody is optionally produced by Chinese Hamster Ovary (CHO) cells.
  • the terms “Trastuzumab” and “rhuMAb4D5” herein cover biosimilar versions of the drug with the United States Adopted Name (USAN) or International Nonproprietary Name (INN): Trastuzumab.
  • antibody herein is used in the broadest sense and specifically covers monoclonal antibodies, polyclonal antibodies, multispecific antibodies (e.g. bispecific antibodies), and antibody fragments, so long as they exhibit the desired biological activity.
  • “Humanized” forms of non-human (e.g., rodent) antibodies are chimeric antibodies that contain minimal sequence derived from non-human immunoglobulin.
  • humanized antibodies are human immunoglobulins (recipient antibody) in which residues from a hypervariable region of the recipient are replaced by residues from a hypervariable region of a non-human species (donor antibody) such as mouse, rat, rabbit or nonhuman primate having the desired specificity, affinity, and capacity.
  • donor antibody such as mouse, rat, rabbit or nonhuman primate having the desired specificity, affinity, and capacity.
  • framework region (FR) residues of the human immunoglobulin are replaced by corresponding non-human residues.
  • humanized antibodies may comprise residues that are not found in the recipient antibody or in the donor antibody. These modifications are made to further refine antibody performance.
  • the humanized antibody will comprise substantially all of at least one, and typically two, variable domains, in which all or substantially all of the hypervariable loops correspond to those of a non-human immunoglobulin and all or substantially all of the FRs are those of a human immunoglobulin sequence.
  • the humanized antibody optionally also will comprise at least a portion of an immunoglobulin constant region (Fc), typically that of a human immunoglobulin.
  • Fc immunoglobulin constant region
  • Humanized HER2 antibodies specifically include Trastuzumab (HERCEPTIN®) as described in Table 3 of U.S. Pat. No. 5,821,337 expressly incorporated herein by reference and as defined herein; and humanized 2C4 antibodies such as Pertuzumab as described and defined herein.
  • HERCEPTIN® Trastuzumab
  • 2C4 antibodies such as Pertuzumab as described and defined herein.
  • an “intact antibody” herein is one which comprises two antigen binding regions, and an Fc region.
  • the intact antibody has a functional Fc region.
  • Antibody fragments comprise a portion of an intact antibody, preferably comprising the antigen binding region thereof.
  • Examples of antibody fragments include Fab, Fab′, F(ab′) 2 , and Fv fragments; diabodies; linear antibodies; single-chain antibody molecules; and multispecific antibodies formed from antibody fragment(s).
  • “Native antibodies” are usually heterotetrameric glycoproteins of about 150,000 daltons, composed of two identical light (L) chains and two identical heavy (H) chains. Each light chain is linked to a heavy chain by one covalent disulfide bond, while the number of disulfide linkages varies among the heavy chains of different immunoglobulin isotypes. Each heavy and light chain also has regularly spaced intrachain disulfide bridges. Each heavy chain has at one end a variable domain (V H ) followed by a number of constant domains. Each light chain has a variable domain at one end (V L ) and a constant domain at its other end. The constant domain of the light chain is aligned with the first constant domain of the heavy chain, and the light-chain variable domain is aligned with the variable domain of the heavy chain. Particular amino acid residues are believed to form an interface between the light chain and heavy chain variable domains.
  • hypervariable region when used herein refers to the amino acid residues of an antibody which are responsible for antigen-binding.
  • the hypervariable region generally comprises amino acid residues from a “complementarity determining region” or “CDR” (e.g. residues 24-34 (L1), 50-56 (L2) and 89-97 (L3) in the light chain variable domain and 31-35 (H1), 50-65 (H2) and 95-102 (H3) in the heavy chain variable domain; Kabat et al., Sequences of Proteins of Immunological Interest, 5th Ed. Public Health Service, National Institutes of Health, Bethesda, Md. (1991)) and/or those residues from a “hypervariable loop” (e.g.
  • “Framework Region” or “FR” residues are those variable domain residues other than the hypervariable region residues as herein defined.
  • Fc region herein is used to define a C-terminal region of an immunoglobulin heavy chain, including native sequence Fc regions and variant Fc regions.
  • the human IgG heavy chain Fc region is usually defined to stretch from an amino acid residue at position Cys226, or from Pro230, to the carboxyl-terminus thereof.
  • the C-terminal lysine (residue 447 according to the EU numbering system) of the Fc region may be removed, for example, during production or purification of the antibody, or by recombinantly engineering the nucleic acid encoding a heavy chain of the antibody. Accordingly, a composition of intact antibodies may comprise antibody populations with all K447 residues removed, antibody populations with no K447 residues removed, and antibody populations having a mixture of antibodies with and without the K447 residue.
  • the numbering of the residues in an immunoglobulin heavy chain is that of the EU index as in Kabat et al., Sequences of Proteins of Immunological Interest, 5th Ed. Public Health Service, National Institutes of Health, Bethesda, Md. (1991), expressly incorporated herein by reference.
  • the “EU index as in Kabat” refers to the residue numbering of the human IgG1 EU antibody.
  • a “functional Fc region” possesses an “effector function” of a native sequence Fc region.
  • effector functions include C1q binding; complement dependent cytotoxicity; Fc receptor binding; antibody-dependent cell-mediated cytotoxicity (ADCC); phagocytosis; down regulation of cell surface receptors (e.g. B cell receptor; BCR), etc.
  • ADCC antibody-dependent cell-mediated cytotoxicity
  • phagocytosis down regulation of cell surface receptors (e.g. B cell receptor; BCR), etc.
  • Such effector functions generally require the Fc region to be combined with a binding domain (e.g. an antibody variable domain) and can be assessed using various assays as herein disclosed, for example.
  • a “native sequence Fc region” comprises an amino acid sequence identical to the amino acid sequence of an Fc region found in nature.
  • Native sequence human Fc regions include a native sequence human IgG1 Fc region (non-A and A allotypes); native sequence human IgG2 Fc region; native sequence human IgG3 Fc region; and native sequence human IgG4 Fc region as well as naturally occurring variants thereof.
  • a “variant Fc region” comprises an amino acid sequence which differs from that of a native sequence Fc region by virtue of at least one amino acid modification, preferably one or more amino acid substitution(s).
  • the variant Fc region has at least one amino acid substitution compared to a native sequence Fc region or to the Fc region of a parent polypeptide, e.g. from about one to about ten amino acid substitutions, and preferably from about one to about five amino acid substitutions in a native sequence Fc region or in the Fc region of the parent polypeptide.
  • the variant Fc region herein will preferably possess at least about 80% homology with a native sequence Fc region and/or with an Fc region of a parent polypeptide, and most preferably at least about 90% homology therewith, more preferably at least about 95% homology therewith.
  • intact antibodies can be assigned to different “classes”. There are five major classes of intact antibodies: IgA, IgD, IgE, IgG, and IgM, and several of these may be further divided into “subclasses” (isotypes), e.g., IgG1, IgG2, IgG3, IgG4, IgA, and IgA2.
  • the heavy-chain constant domains that correspond to the different classes of antibodies are called ⁇ , ⁇ , ⁇ , ⁇ , and ⁇ , respectively.
  • the subunit structures and three-dimensional configurations of different classes of immunoglobulins are well known.
  • naked antibody is an antibody that is not conjugated to a heterologous molecule, such as a cytotoxic moiety or radiolabel.
  • affinity matured antibody is one with one or more alterations in one or more hypervariable regions thereof which result an improvement in the affinity of the antibody for antigen, compared to a parent antibody which does not possess those alteration(s).
  • Preferred affinity matured antibodies will have nanomolar or even picomolar affinities for the target antigen.
  • Affinity matured antibodies are produced by procedures known in the art. Marks et al. Bio/Technology 10:779-783 (1992) describes affinity maturation by VH and VL domain shuffling. Random mutagenesis of CDR and/or framework residues is described by: Barbas et al. Proc Nat. Acad. Sci , USA 91:3809-3813 (1994); Schier et al.
  • a “deamidated” antibody is one in which one or more asparagine residues thereof has been derivitized, e.g. to an aspartic acid, a succinimide, or an iso-aspartic acid.
  • cancer and “cancerous” refer to or describe the physiological condition in mammals that is typically characterized by unregulated cell growth.
  • “Gastric cancer” specifically includes metastatic or locally advanced non-resectable gastric cancer, including, without limitation, histologically confirmed adenocarcinoma of the stomach or gastroesophageal junction with inoperable (non-resectable) locally advanced or metastatic disease, not amenable to curative therapy, and post-operatively recurrent advanced gastric cancer, such as adenocarcinoma of the stomach or gastroesophageal junction, when the intent of the surgery was to cure the disease.
  • an “advanced” cancer is one which has spread outside the site or organ of origin, either by local invasion or metastasis. Accordingly, the term “advanced” cancer includes both locally advanced and metastatic disease.
  • a “refractory” cancer is one which progresses even though an anti-tumor agent, such as a chemotherapy, is being administered to the cancer patient.
  • An example of a refractory cancer is one which is platinum refractory.
  • a “recurrent” cancer is one which has regrown, either at the initial site or at a distant site, after a response to initial therapy, such as surgery.
  • a “locally recurrent” cancer is cancer that returns after treatment in the same place as a previously treated cancer.
  • a “non-resectable” or “unresectable” cancer is not able to be removed (resected) by surgery.
  • “Early-stage breast cancer” herein refers to breast cancer that has not spread beyond the breast or the axillary lymph nodes. Such cancer is generally treated with neoadjuvant or adjuvant therapy.
  • Neoadjuvant therapy refers to systemic therapy given prior to surgery.
  • adjuvant therapy refers to systemic therapy given after surgery.
  • Metalstatic cancer refers to cancer which has spread from one part of the body (e.g. the breast) to another part of the body.
  • a “patient” or “subject” is a human patient.
  • the patient may be a “cancer patient,” i.e. one who is suffering or at risk for suffering from one or more symptoms of cancer, in particular gastric or breast cancer.
  • a “patient population” refers to a group of cancer patients. Such populations can be used to demonstrate statistically significant efficacy and/or safety of a drug, such as Pertuzumab.
  • a “relapsed” patient is one who has signs or symptoms of cancer after remission.
  • the patient has relapsed after adjuvant or neoadjuvant therapy.
  • a cancer or biological sample which “displays HER expression, amplification, or activation” is one which, in a diagnostic test, expresses (including overexpresses) a HER receptor, has amplified HER gene, and/or otherwise demonstrates activation or phosphorylation of a HER receptor.
  • a cancer or biological sample which “displays HER activation” is one which, in a diagnostic test, demonstrates activation or phosphorylation of a HER receptor. Such activation can be determined directly (e.g. by measuring HER phosphorylation by ELISA) or indirectly (e.g. by gene expression profiling or by detecting HER heterodimers, as described herein).
  • a cancer cell with “HER receptor overexpression or amplification” is one which has significantly higher levels of a HER receptor protein or gene compared to a noncancerous cell of the same tissue type. Such overexpression may be caused by gene amplification or by increased transcription or translation. HER receptor overexpression or amplification may be determined in a diagnostic or prognostic assay by evaluating increased levels of the HER protein present on the surface of a cell (e.g. via an immunohistochemistry assay; IHC). Alternatively, or additionally, one may measure levels of HER-encoding nucleic acid in the cell, e.g.
  • ISH in situ hybridization
  • FISH fluorescent in situ hybridization
  • CISH chromogenic in situ hybridization
  • PCR polymerase chain reaction
  • a “HER2-positive” cancer comprises cancer cells which have higher than normal levels of HER2.
  • Examples of HER2-positive cancer include HER2-positive breast cancer and HER2-positive gastric cancer.
  • HER2-positive cancer has an immunohistochemistry (IHC) score of 2+ or 3+ and/or an in situ hybridization (ISH) amplification ratio ⁇ 2.0.
  • IHC immunohistochemistry
  • ISH in situ hybridization
  • an “anti-tumor agent” refers to a drug used to treat cancer.
  • anti-tumor agents herein include chemotherapy agents, HER dimerization inhibitors, HER antibodies, antibodies directed against tumor associated antigens, anti-hormonal compounds, cytokines, EGFR-targeted drugs, anti-angiogenic agents, tyrosine kinase inhibitors, growth inhibitory agents and antibodies, cytotoxic agents, antibodies that induce apoptosis, COX inhibitors, farnesyl transferase inhibitors, antibodies that binds oncofetal protein CA 125, HER2 vaccines, Raf or ras inhibitors, liposomal doxorubicin, topotecan, taxene, dual tyrosine kinase inhibitors, TLK286, EMD-7200, Pertuzumab, Trastuzumab, erlotinib, and bevacizumab.
  • the “epitope 2C4” is the region in the extracellular domain of HER2 to which the antibody 2C4 binds.
  • a routine cross-blocking assay such as that described in Antibodies, A Laboratory Manual , Cold Spring Harbor Laboratory, Ed Harlow and David Lane (1988), can be performed.
  • the antibody blocks 2C4's binding to HER2 by about 50% or more.
  • epitope mapping can be performed to assess whether the antibody binds essentially to the 2C4 epitope of HER2.
  • Epitope 2C4 comprises residues from Domain II (SEQ ID NO: 2) in the extracellular domain of HER2.
  • 2C4 and Pertuzumab binds to the extracellular domain of HER2 at the junction of domains I, II and 111 (SEQ ID NOs: 1, 2, and 3, respectively). Franklin et al. Cancer Cell 5:317-328 (2004).
  • the “epitope 4D5” is the region in the extracellular domain of HER2 to which the antibody 4D5 (ATCC CRL 10463) and Trastuzumab bind. This epitope is close to the transmembrane domain of HER2, and within Domain IV of HER2 (SEQ ID NO: 4).
  • a routine cross-blocking assay such as that described in Antibodies, A Laboratory Manual, Cold Spring Harbor Laboratory, Ed Harlow and David Lane (1988), can be performed.
  • epitope mapping can be performed to assess whether the antibody binds essentially to the 4D5 epitope of HER2 (e.g. any one or more residues in the region from about residue 529 to about residue 625, inclusive of the HER2ECD, residue numbering including signal peptide).
  • Treatment refers to both therapeutic treatment and prophylactic or preventative measures. Those in need of treatment include those already with cancer as well as those in which cancer is to be prevented. Hence, the patient to be treated herein may have been diagnosed as having cancer or may be predisposed or susceptible to cancer.
  • the term “effective amount” refers to an amount of a drug effective to treat cancer in the patient.
  • the effective amount of the drug may reduce the number of cancer cells; reduce the tumor size; inhibit (i.e., slow to some extent and preferably stop) cancer cell infiltration into peripheral organs; inhibit (i.e., slow to some extent and preferably stop) tumor metastasis; inhibit, to some extent, tumor growth; and/or relieve to some extent one or more of the symptoms associated with the cancer.
  • the drug may prevent growth and/or kill existing cancer cells, it may be cytostatic and/or cytotoxic.
  • the effective amount may extend progression free survival (e.g.
  • cytotoxic agent refers to a substance that inhibits or prevents the function of cells and/or causes destruction of cells.
  • the term is intended to include radioactive isotopes (e.g. At 211 , I 131 , I 125 , Y 90 , Re 186 , Re 188 , Sm 153 , Bi 212 , P 32 and radioactive isotopes of Lu), chemotherapeutic agents, and toxins such as small molecule toxins or enzymatically active toxins of bacterial, fungal, plant or animal origin, including fragments and/or variants thereof.
  • radioactive isotopes e.g. At 211 , I 131 , I 125 , Y 90 , Re 186 , Re 188 , Sm 153 , Bi 212 , P 32 and radioactive isotopes of Lu
  • chemotherapeutic agents e.g. At 211 , I 131 , I 125 , Y 90 , Re 186
  • a “chemotherapy” is use of a chemical compound useful in the treatment of cancer.
  • chemotherapeutic agents, used in chemotherapy include alkylating agents such as thiotepa and CYTOXAN® cyclosphosphamide; alkyl sulfonates such as busulfan, improsulfan and piposulfan; aziridines such as benzodopa, carboquone, meturedopa, and uredopa; ethylenimines and methylamelamines including altretamine, triethylenemelamine, trietylenephosphoramide, triethiylenethiophosphoramide and trimethylolomelamine; TLK 286 (TELCYTATTM); acetogenins (especially bullatacin and bullatacinone); delta-9-tetrahydrocannabinol (dronabinol, MARINOL®); beta-lapachone; lapachol; colchicines; betulinic acid;
  • anthracyclines such as annamycin, AD 32, alcarubicin, daunorubicin, dexrazoxane, DX-52-1, epirubicin, GPX-100, idarubicin, KRN5500, menogaril, dynemicin, including dynemicin A, an esperamicin, neocarzinostatin chromophore and related chromoprotein enediyne antiobiotic chromophores, aclacinomysins, actinomycin, authramycin, azaserine, bleomycins, cactinomycin, carabicin, caminomycin, carzinophilin, chromomycinis, dactinomycin, detorubicin, 6-diazo-5-oxo-L-norleucine, ADRIAMYCIN® doxorubicin (including annamycin, AD 32, alcarubicin, daunorubi
  • anti-hormonal agents that act to regulate or inhibit hormone action on tumors
  • SERMs selective estrogen receptor modulators
  • tamoxifen including NOLVADEX® tamoxifen
  • raloxifene including NOLVADEX® tamoxifen
  • droloxifene 4-hydroxytamoxifen
  • trioxifene keoxifene
  • LY117018 onapristone
  • FARESTON® toremifene
  • anti-androgens such as flutamide, nilutamide, bicalutamide, leuprolide, and goserelin
  • troxacitabine a 1,3-dioxolane nucleoside cytosine analog
  • antisense oligonucleotides particularly those that inhibit expression of genes in signaling pathways implicated in abherant cell proliferation, such as, for example, PKC-alpha, Raf, H-Ras,
  • taxanes are a chemotherapy which inhibits mitosis and interferes with microtubules.
  • taxanes include Paclitaxel (TAXOL®; Bristol-Myers Squibb Oncology, Princeton, N.J.); cremophor-free, albumin-engineered nanoparticle formulation of paclitaxel or nab-paclitaxel (ABRAXANETM; American Pharmaceutical Partners, Schaumberg, Ill.); and Docetaxel (TAXOTERE®; Rhone-Poulenc Rorer, Antony, France).
  • an “anthacycline” is a type of antibiotic that comes from the fungus Streptococcus peucetius, examples include: Daunorubicin, Doxorubicin, and Epirubicin, etc.
  • “Anthracycline-based chemotherapy” refers to a chemotherapy regimen that consists of or include one or more anthracycline. Examples include 5-FU, epirubicin, and cyclophosphamide (FEC); 5-FU, doxorubicin, and cyclophosphamide (FAC); doxorubicin and cyclophosphamide (AC); epirubicin and cyclophosphamide (EC); etc.
  • Carboplatin-based chemotherapy refers to a chemotherapy regimen that consists of or includes one or more Carboplatins.
  • An example is TCH (Docetaxel/TAXOL®, Carboplatin, and Trastuzumab/HERCEPTIN®).
  • aromatase inhibitor inhibits the enzyme aromatase, which regulates estrogen production in the adrenal glands.
  • aromatase inhibitors include: 4(5)-imidazoles, aminoglutethimide, MEGASE® megestrol acetate, AROMASIN® exemestane, formestanie, fadrozole, RIVISOR® vorozole, FEMARA® letrozole, and ARIMIDEX® anastrozole.
  • the aromatase inhibitor herein is letrozole or anastrozole.
  • antimetabolite chemotherapy is use of an agent which is structurally similar to a metabolite, but can not be used by the body in a productive manner. Many antimetabolite chemotherapy interferes with the production of the nucleic acids, RNA and DNA.
  • antimetabolite chemotherapeutic agents include gemcitabine (GEMZAR®), 5-fluorouracil (5-FU), capecitabine (XELODATM), 6-mercaptopurine, methotrexate, 6-thioguanine, pemetrexed, raltitrexed, arabinosylcytosine ARA-C cytarabine (CYTOSAR-U®), dacarbazine (DTIC-DOME®), azocytosine, deoxycytosine, pyridmidene, fludarabine (FLUDARA®), cladrabine, 2-deoxy-D-glucose etc.
  • chemotherapy-resistant cancer is meant that the cancer patient has progressed while receiving a chemotherapy regimen (i.e. the patient is “chemotherapy refractory”), or the patient has progressed within 12 months (for instance, within 6 months) after completing a chemotherapy regimen.
  • platinum is used herein to refer to platinum based chemotherapy, including, without limitation, cisplatin, carboplatin, and oxaliplatin.
  • fluoropyrimidine is used herein to refer to an antimetabolite chemotherapy, including, without limitation, capecitabine, floxuridine, and fluorouracil (5-FU).
  • a “fixed” or “flat” dose of a therapeutic agent herein refers to a dose that is administered to a human patient without regard for the weight (WT) or body surface area (BSA) of the patient.
  • the fixed or flat dose is therefore not provided as a mg/kg dose or a mg/m 2 dose, but rather as an absolute amount of the therapeutic agent.
  • a “loading” dose herein generally comprises an initial dose of a therapeutic agent administered to a patient, and is followed by one or more maintenance dose(s) thereof. Generally, a single loading dose is administered, but multiple loading doses are contemplated herein. Usually, the amount of loading dose(s) administered exceeds the amount of the maintenance dose(s) administered and/or the loading dose(s) are administered more frequently than the maintenance dose(s), so as to achieve the desired steady-state concentration of the therapeutic agent earlier than can be achieved with the maintenance dose(s).
  • a “maintenance” dose herein refers to one or more doses of a therapeutic agent administered to the patient over a treatment period.
  • the maintenance doses are administered at spaced treatment intervals, such as approximately every week, approximately every 2 weeks, approximately every 3 weeks, or approximately every 4 weeks, preferably every 3 weeks.
  • Intravenous (IV) bag refers to the introduction of a drug-containing solution into the body through a vein for therapeutic purposes. Generally, this is achieved via an intravenous (IV) bag.
  • IV intravenous
  • IV bag is a bag that can hold a solution which can be administered via the vein of a patient.
  • the solution is a saline solution (e.g. about 0.9% or about 0.45% NaCl).
  • the IV bag is formed from polyolefin or polyvinal chloride.
  • co-administering is meant intravenously administering two (or more) drugs during the same administration, rather than sequential infusions of the two or more drugs. Generally, this will involve combining the two (or more) drugs into the same IV bag prior to co-administration thereof.
  • Cardiac toxicity refers to any toxic side effect resulting from administration of a drug or drug combination. Cardiac toxicity can be evaluated based on any one or more of: incidence of symptomatic left ventricular systolic dysfunction (LVSD) or congestive heart failure (CHF), or decrease in left ventricular ejection fraction (LVEF).
  • LVSD left ventricular systolic dysfunction
  • CHF congestive heart failure
  • LVEF left ventricular ejection fraction
  • the phrase “without increasing cardiac toxicity” for a drug combination including Pertuzumab refers to an incidence of cardiac toxicity that is equal or less than that observed in patients treated with drugs other than Pertuzumab in the drug combination (e.g. equal or less than that resulting from administration of Trastuzumab and the chemotherapy, e.g. Docetaxel).
  • a “vial” is a container suitable for holding a liquid or lyophilized preparation.
  • the vial is a single-use vial, e.g. a 20-cc single-use vial with a stopper.
  • a “package insert” is a leaflet that, by order of the Food and Drug Administration (FDA) or other Regulatory Authority, must be placed inside the package of every prescription drug.
  • the leaflet generally includes the trademark for the drug, its generic name, and its mechanism of action; states its indications, contraindications, warnings, precautions, adverse effects, and dosage forms; and includes instructions for the recommended dose, time, and route of administration.
  • safety data concerns the data obtained in a controlled clinical trial showing the prevalence and severity of adverse events to guide the user regarding the safety of the drug, including guidance on how to monitor and prevent adverse reactions to the drug.
  • Table 3 and Table 4 herein provide safety data for Pertuzumab.
  • the safety data comprises any one or more (e.g. two, three, four or more) of the most common adverse events (AEs) or adverse reactions (ADRs) in Tables 3 and 4.
  • AEs adverse events
  • ADRs adverse reactions
  • the safety data comprises information about neutropenia, febrile neutropenia, diarrhea and/or cardiac toxicity as disclosed herein.
  • “Efficacy data' refers to the data obtained in controlled clinical trial showing that a drug effectively treats a disease, such as cancer. Efficacy data for Pertuzumab is provided in the examples herein. As to HER2-positive metastatic or locally recurrent, unresectable breast cancer, efficacy data for Pertuzumab is found in Table 2, Table 5, FIG. 8 and FIG. 10 herein.
  • the safety data comprises any one or more (e.g.
  • the efficacy data comprises information about progression free survival (PFS) and/or overall survival (OS) as disclosed herein.
  • stable mixture when referring to a mixture of two or more drugs, such as Pertuzumab and Trastuzumab” means that each of the drugs in the mixture essentially retains its physical and chemical stability in the mixture as evaluated by one or more analytical assays.
  • analytical assays for this purpose include: color, appearance and clarity (CAC), concentration and turbidity analysis, particulate analysis, size exclusion chromatography (SEC), ion-exchange chromatography (IEC), capillary zone electrophoresis (CZE), image capillary isoelectric focusing (iCIEF), and potency assay.
  • CAC color, appearance and clarity
  • concentration and turbidity analysis for this purpose include: color, appearance and clarity (CAC), concentration and turbidity analysis, particulate analysis, size exclusion chromatography (SEC), ion-exchange chromatography (IEC), capillary zone electrophoresis (CZE), image capillary isoelectric focusing (iCIEF), and potency assay.
  • a drug that is administered “concurrently” with one or more other drugs is administered during the same treatment cycle, on the same day of treatment as the one or more other drugs, and, optionally, at the same time as the one or more other drugs.
  • the concurrently administered drugs are each administered on day-1 of a 3-week cycle.
  • the HER2 antigen to be used for production of antibodies may be, e.g., a soluble form of the extracellular domain of a HER2 receptor or a portion thereof, containing the desired epitope.
  • cells expressing HER2 at their cell surface e.g. NIH-3T3 cells transformed to overexpress HER2; or a carcinoma cell line such as SK-BR-3 cells, see Stancovski et al. PNAS ( USA ) 88:8691-8695 (1991)
  • NIH-3T3 cells transformed to overexpress HER2 e.g. NIH-3T3 cells transformed to overexpress HER2; or a carcinoma cell line such as SK-BR-3 cells, see Stancovski et al. PNAS ( USA ) 88:8691-8695 (1991)
  • Other forms of HER2 receptor useful for generating antibodies will be apparent to those skilled in the art.
  • the monoclonal antibodies may be made using the hybridoma method first described by Kohler et al., Nature, 256:495 (1975), by recombinant DNA methods (U.S. Pat. No. 4,816,567).
  • anti-HER2 antibodies used in accordance with the present invention are commercially available.
  • a humanized antibody has one or more amino acid residues introduced into it from a source which is non-human. These non-human amino acid residues are often referred to as “import” residues, which are typically taken from an “import” variable domain.
  • Humanization can be essentially performed following the method of Winter and co-workers (Jones et al., Nature, 321:522-525 (1986); Riechmann et al., Nature, 332:323-327 (1988); Verhoeyen et al., Science, 239:1534-1536 (1988)), by substituting hypervariable region sequences for the corresponding sequences of a human antibody.
  • humanized antibodies are chimeric antibodies (U.S. Pat. No. 4,816,567) wherein substantially less than an intact human variable domain has been substituted by the corresponding sequence from a non-human species.
  • humanized antibodies are typically human antibodies in which some hypervariable region residues and possibly some FR residues are substituted by residues from analogous sites in rodent antibodies.
  • variable domains both light and heavy
  • sequence of the variable domain of a rodent antibody is screened against the entire library of known human variable-domain sequences.
  • the human sequence which is closest to that of the rodent is then accepted as the human framework region (FR) for the humanized antibody (Sims et al., J. Immunol., 151:2296 (1993); Chothia et al., J. Mol. Biol., 196:901 (1987)).
  • Another method uses a particular framework region derived from the consensus sequence of all human antibodies of a particular subgroup of light or heavy chains.
  • the same framework may be used for several different humanized antibodies (Carter et al., Proc. Natl. Acad. Sci. USA, 89:4285 (1992); Presta et al., J. Immunol., 151:2623 (1993)).
  • humanized antibodies are prepared by a process of analysis of the parental sequences and various conceptual humanized products using three-dimensional models of the parental and humanized sequences.
  • Three-dimensional immunoglobulin models are commonly available and are familiar to those skilled in the art.
  • Computer programs are available which illustrate and display probable three-dimensional conformational structures of selected candidate immunoglobulin sequences. Inspection of these displays permits analysis of the likely role of the residues in the functioning of the candidate immunoglobulin sequence, i.e., the analysis of residues that influence the ability of the candidate immunoglobulin to bind its antigen.
  • FR residues can be selected and combined from the recipient and import sequences so that the desired antibody characteristic, such as increased affinity for the target antigen(s), is achieved.
  • the hypervariable region residues are directly and most substantially involved in influencing antigen binding.
  • U.S. Pat. No. 6,949,245 describes production of exemplary humanized HER2 antibodies which bind HER2 and block ligand activation of a HER receptor.
  • Humanized HER2 antibodies specifically include Trastuzumab (HERCEPTIN®) as described in Table 3 of U.S. Pat. No. 5,821,337 expressly incorporated herein by reference and as defined herein; and humanized 2C4 antibodies such as Pertuzumab as described and defined herein.
  • HERCEPTIN® Trastuzumab
  • 2C4 antibodies such as Pertuzumab as described and defined herein.
  • the humanized antibodies herein may, for example, comprise nonhuman hypervariable region residues incorporated into a human variable heavy domain and may further comprise a framework region (FR) substitution at a position selected from the group consisting of 69H, 71H and 73H utilizing the variable domain numbering system set forth in Kabat et al., Sequences of Proteins of Immunological Interest, 5th Ed. Public Health Service, National Institutes of Health, Bethesda, Md. (1991).
  • the humanized antibody comprises FR substitutions at two or all of positions 69H, 71H and 73H.
  • An exemplary humanized antibody of interest herein comprises variable heavy domain complementarity determining residues GFTFTDYTMX (SEQ ID NO: 17), where X is preferably D or S; DVNPNSGGSIYNQRFKG (SEQ ID NO:18); and/or NLGPSFYFDY (SEQ ID NO:19), optionally comprising amino acid modifications of those CDR residues, e.g. where the modifications essentially maintain or improve affinity of the antibody.
  • an antibody variant for use in the methods of the present invention may have from about one to about seven or about five amino acid substitutions in the above variable heavy CDR sequences.
  • Such antibody variants may be prepared by affinity maturation, e.g., as described below.
  • the humanized antibody may comprise variable light domain complementarity determining residues KASQDVSIGVA (SEQ ID NO:20); SASYX 1 X 2 X 3 , where X 1 is preferably R or L, X 2 is preferably Y or E, and X 3 is preferably T or S (SEQ ID NO:21); and/or QQYYIYPYT (SEQ ID NO:22), e.g. in addition to those variable heavy domain CDR residues in the preceding paragraph.
  • Such humanized antibodies optionally comprise amino acid modifications of the above CDR residues, e.g. where the modifications essentially maintain or improve affinity of the antibody.
  • the antibody variant of interest may have from about one to about seven or about five amino acid substitutions in the above variable light CDR sequences.
  • Such antibody variants may be prepared by affinity maturation, e.g., as described below.
  • the present application also contemplates affinity matured antibodies which bind HER2.
  • the parent antibody may be a human antibody or a humanized antibody, e.g., one comprising the variable light and/or variable heavy sequences of SEQ ID Nos. 7 and 8, respectively (i.e. comprising the VL and/or VH of Pertuzumab).
  • An affinity matured variant of Pertuzumab preferably binds to HER2 receptor with an affinity superior to that of murine 2C4 or Pertuzumab (e.g. from about two or about four fold, to about 100 fold or about 1000 fold improved affinity, e.g. as assessed using a HER2-extracellular domain (ECD) ELISA).
  • ECD HER2-extracellular domain
  • variable heavy CDR residues for substitution include H28, H30, H34, H35, H64, H96, H99, or combinations of two or more (e.g. two, three, four, five, six, or seven of these residues).
  • variable light CDR residues for alteration include L28, L50, L53, L56, L91, L92, L93, L94, L96, L97 or combinations of two or more (e.g. two to three, four, five or up to about ten of these residues).
  • Humanization of murine 4D5 antibody to generate humanized variants thereof, including Trastuzumab, is described in U.S. Pat. Nos. 5,821,337, 6,054,297, 6,407,213, 6,639,055, 6,719,971, and 6,800,738, as well as Carter et al. PNAS (USA), 89:4285-4289 (1992).
  • HuMAb4D5-8 (Trastuzumab) bound HER2 antigen 3-fold more tightly than the mouse 4D5 antibody, and had secondary immune function (ADCC) which allowed for directed cytotoxic activity of the humanized antibody in the presence of human effector cells.
  • ADCC secondary immune function
  • HuMAb4D5-8 comprised variable light (V L ) CDR residues incorporated in a V L lc subgroup I consensus framework, and variable heavy (V H ) CDR residues incorporated into a V H subgroup III consensus framework.
  • the antibody further comprised framework region (FR) substitutions as positions: 71, 73, 78, and 93 of the V H (Kabat numbering of FR residues; and a FR substitution at position 66 of the V L (Kabat numbering of FR residues).
  • Trastuzumab comprises non-A allotype human ⁇ 1 Fc region.
  • the humanized antibody or affinity matured antibody may be an antibody fragment.
  • the humanized antibody or affinity matured antibody may be an intact antibody, such as an intact IgG1 antibody.
  • the composition comprises a mixture of a main species Pertuzumab antibody and one or more variants thereof.
  • the preferred embodiment herein of a Pertuzumab main species antibody is one comprising the variable light and variable heavy amino acid sequences in SEQ ID Nos. 7 and 8, and most preferably comprising a light chain amino acid sequence of SEQ ID No. 11, and a heavy chain amino acid sequence of SEQ ID No. 12 (including deamidated and/or oxidized variants of those sequences).
  • the composition comprises a mixture of the main species Pertuzumab antibody and an amino acid sequence variant thereof comprising an amino-terminal leader extension.
  • the amino-terminal leader extension is on a light chain of the antibody variant (e.g. on one or two light chains of the antibody variant).
  • the main species HER2 antibody or the antibody variant may be an full length antibody or antibody fragment (e.g. Fab of F(ab′)2 fragments), but preferably both are full length antibodies.
  • the antibody variant herein may comprise an amino-terminal leader extension on any one or more of the heavy or light chains thereof.
  • the amino-terminal leader extension is on one or two light chains of the antibody.
  • the amino-terminal leader extension preferably comprises or consists of VHS—.
  • Presence of the amino-terminal leader extension in the composition can be detected by various analytical techniques including, but not limited to, N-terminal sequence analysis, assay for charge heterogeneity (for instance, cation exchange chromatography or capillary zone electrophoresis), mass spectrometry, etc.
  • the amount of the antibody variant in the composition generally ranges from an amount that constitutes the detection limit of any assay (preferably N-terminal sequence analysis) used to detect the variant to an amount less than the amount of the main species antibody. Generally, about 20% or less (e.g. from about 1% to about 15%, for instance from 5% to about 15%) of the antibody molecules in the composition comprise an amino-terminal leader extension.
  • Such percentage amounts are preferably determined using quantitative N-terminal sequence analysis or cation exchange analysis (preferably using a high-resolution, weak cation-exchange column, such as a PROPAC WCX-10TM cation exchange column).
  • a high-resolution, weak cation-exchange column such as a PROPAC WCX-10TM cation exchange column.
  • further amino acid sequence alterations of the main species antibody and/or variant are contemplated, including but not limited to an antibody comprising a C-terminal lysine residue on one or both heavy chains thereof, a deamidated antibody variant, etc.
  • the main species antibody or variant may further comprise glycosylation variations, non-limiting examples of which include antibody comprising a G1 or G2 oligosaccharide structure attached to the Fc region thereof, antibody comprising a carbohydrate moiety attached to a light chain thereof (e.g. one or two carbohydrate moieties, such as glucose or galactose, attached to one or two light chains of the antibody, for instance attached to one or more lysine residues), antibody comprising one or two non-glycosylated heavy chains, or antibody comprising a sialidated oligosaccharide attached to one or two heavy chains thereof etc.
  • glycosylation variations non-limiting examples of which include antibody comprising a G1 or G2 oligosaccharide structure attached to the Fc region thereof, antibody comprising a carbohydrate moiety attached to a light chain thereof (e.g. one or two carbohydrate moieties, such as glucose or galactose, attached to one or two light chains of the antibody, for instance attached to
  • composition may be recovered from a genetically engineered cell line, e.g. a Chinese Hamster Ovary (CHO) cell line expressing the HER2 antibody, or may be prepared by peptide synthesis.
  • a genetically engineered cell line e.g. a Chinese Hamster Ovary (CHO) cell line expressing the HER2 antibody
  • CHO Chinese Hamster Ovary
  • the Trastuzumab composition generally comprises a mixture of a main species antibody (comprising light and heavy chain sequences of SEQ ID NOS: 13 and 14, respectively), and variant forms thereof, in particular acidic variants (including deamidated variants).
  • the amount of such acidic variants in the composition is less than about 25%, or less than about 20%, or less than about 15%. See, U.S. Pat. No. 6,339,142. See, also, Harris et al., J.
  • Peak A (Asn30 deamidated to Asp in both light chains); Peak B (Asn55 deamidated to isoAsp in one heavy chain); Peak 1 (Asn30 deamidated to Asp in one light chain); Peak 2 (Asn30 deamidated to Asp in one light chain, and Asp102 isomerized to isoAsp in one heavy chain); Peak 3 (main peak form, or main species antibody); Peak 4 (Asp102 isomerized to isoAsp in one heavy chain); and Peak C (Asp102 succinimide (Asu) in one heavy chain).
  • 5-fluorouracil 5-fluorouracil plus cisplatin is widely used for this indication.
  • 5-FU+cisplatin produced response rates of approximately 40% and median overall survival of 7-10.6 months (Lacave A J, Baron F J, Anton L M, et al. Ann Oncol 1991; 2:751-754; Rougier P, Ducreux M, Mahjoubi M, et al. Eur J Cancer 1994; 30A:1263-1269; Vanhoefer U, Wagner T, Lutz M, et al. Eur J Cancer 2001; 37 Suppl 6: abstract S27.)
  • HER2 can be used to select patients for treatment in accordance with the present invention.
  • FDA-approved commercial assays are available to identify HER2-positive cancer patients. These methods include HERCEPTEST® (Dako) and PATHWAY® HER2 (immunohistochemistry (IHC) assays) and PathVysion® and HER2FISH pharmDxTM (FISH assays). Users should refer to the package inserts of specific assay kits for information on the validation and performance of each assay.
  • HER2 overexpression may be analyzed by IHC, e.g. using the HERCEPTEST® (Dako). Paraffin embedded tissue sections from a tumor biopsy may be subjected to the IHC assay and accorded a HER2 protein staining intensity criteria as follows:
  • HER2-negative Those tumors with 0 or 1+ scores for HER2 overexpression assessment may be characterized as HER2-negative, whereas those tumors with 2+ or 3+ scores may be characterized as HER2-positive.
  • Tumors overexpressing HER2 may be rated by immunohistochemical scores corresponding to the number of copies of HER2 molecules expressed per cell, and can been determined biochemically:
  • ISH in situ hybridization
  • FISH fluorescent in situ hybridization
  • FISH assays such as the INFORMTM (sold by Ventana, Ariz.) or PathVysion® (Vysis, Ill.) may be carried out on formalin-fixed, paraffin-embedded tumor tissue to determine the extent (if any) of HER2 amplification in the tumor.
  • HER2-positive status is confirmed using archival paraffin-embedded tumor tissue, using any of the foregoing methods.
  • HER2-positive patients having a 2+ or 3+ IHC score or who are FISH or ISH positive are selected for treatment in accordance with the present invention.
  • Therapeutic formulations of the HER2 antibodies used in accordance with the present invention are prepared for storage by mixing an antibody having the desired degree of purity with optional pharmaceutically acceptable carriers, excipients or stabilizers ( Remington's Pharmaceutical Sciences 16th edition, Osol, A. Ed. (1980)), generally in the form of lyophilized formulations or aqueous solutions. Antibody crystals are also contemplated (see US Pat Appin 2002/0136719).
  • Acceptable carriers, excipients, or stabilizers are nontoxic to recipients at the dosages and concentrations employed, and include buffers such as phosphate, citrate, and other organic acids; antioxidants including ascorbic acid and methionine; preservatives (such as octadecyldimethylbenzyl ammonium chloride; hexamethonium chloride; benzalkonium chloride, benzethonium chloride; phenol, butyl or benzyl alcohol; alkyl parabens such as methyl or propyl paraben; catechol; resorcinol; cyclohexanol; 3-pentanol; and m-cresol); low molecular weight (less than about 10 residues) polypeptides; proteins, such as serum albumin, gelatin, or immunoglobulins; hydrophilic polymers such as polyvinylpyrrolidone; amino acids such as glycine, glutamine, asparagine, histidine,
  • Zn-protein complexes Zn-protein complexes
  • non-ionic surfactants such as TWEENTM, PLURONICSTM or polyethylene glycol (PEG). Lyophilized antibody formulations are described in WO 97/04801, expressly incorporated herein by reference.
  • Lyophilized antibody formulations are described in U.S. Pat. Nos. 6,267,958, 6,685,940 and 6,821,515, expressly incorporated herein by reference.
  • the preferred HERCEPTIN® (Trastuzumab) formulation is a sterile, white to pale yellow preservative-free lyophilized powder for intravenous (IV) administration, comprising 440 mg Trastuzumab, 400 mg ⁇ , ⁇ -trehalose dehydrate, 9.9 mg L-histidine-HCl, 6.4 mg L-histidine, and 1.8 mg polysorbate 20, USP.
  • the preferred Pertuzumab formulation for therapeutic use comprises 30 mg/mL Pertuzumab in 20 mM histidine acetate, 120 mM sucrose, 0.02% polysorbate 20, at pH 6.0.
  • An alternate Pertuzumab formulation comprises 25 mg/mL Pertuzumab, 10 mM histidine-HCl buffer, 240 mM sucrose, 0.02% polysorbate 20, pH 6.0.
  • the formulation of the placebo used in the clinical trials described in the Examples is equivalent to Pertuzumab, without the active agent.
  • the formulation herein may also contain more than one active compound as necessary for the particular indication being treated, preferably those with complementary activities that do not adversely affect each other.
  • active compound preferably those with complementary activities that do not adversely affect each other.
  • drugs which can be combined with the HER dimerization inhibitor are described in the Method Section below. Such molecules are suitably present in combination in amounts that are effective for the purpose intended.
  • the formulations to be used for in vivo administration must be sterile. This is readily accomplished by filtration through sterile filtration membranes.
  • a method for extending progression free survival (PFS) in a HER2-positive breast cancer patient population by 6 months or more comprises administering Pertuzumab, Trastuzumab and chemotherapy (e.g. taxane such as Docetaxel) to the patients in the population.
  • the patient population includes a suitable number of patients (e.g. 200 or more, 300 or more or 400 or more patients) so that a statistically significant extension of PFS in the population can be evaluated.
  • phase III CLEOPATRA clinical data in Example 3 below show that median PFS assessed by investigators was 12.4 months with placebo plus Trastuzumab plus Docetaxel and 18.5 months with Pertuzumab plus Trastuzumab plus Docetaxel, thus the improvement in median PFS was 6 months or more (e.g. 6.1 months) relative to patients not receiving Pertuzumab (i.e. patients only receiving Trastuzumab and Docetaxel).
  • a method of obtaining an objective response rate of 80% or more in a HER2-positive breast cancer patient population comprises administering Pertuzumab, Trastuzumab and chemotherapy (e.g. taxane, such as Docetaxel) to the patients in the population.
  • chemotherapy e.g. taxane, such as Docetaxel
  • a method of combining two HER2 antibodies to treat HER2-positive cancer without increasing cardiac toxicity in a HER2-positive cancer patient population comprises administering Pertuzumab, Trastuzumab, and chemotherapy to the patients in the population.
  • the patient population includes a suitable number of patients (e.g. 200 or more, 300 or more or 400 or more patients) so that a statistically significant assessment of lack of cardiac toxicity resulting from the combination can be made.
  • the phase III CLEOPATRA clinical data in Example 3 below show that combining Pertuzumab and Trastuzumab does not exacerbate cardiac toxicity.
  • Cardiac toxicity can be monitored for incidence of symptomatic left ventricular systolic dysfunction (LVSD) or congestive heart failure (CHF), or decrease in left ventricular ejection fraction (LVEF), e.g. as disclosed in Example 3 below.
  • LVSD left ventricular systolic dysfunction
  • CHF congestive heart failure
  • LVEF left ventricular ejection fraction
  • the breast cancer is metastatic or locally recurrent, unresectable breast cancer, or de novo Stage IV disease, is defined as immunohistochemistry (NC) 3+ and/or fluorescence in situ hybridization (FISH) amplification ratio ⁇ 2.0.
  • NC immunohistochemistry
  • FISH fluorescence in situ hybridization
  • the patients in the population have not received previous treatment or have relapsed after adjuvant therapy, have a left ventricular ejection fraction (LVEF) of ⁇ 50% at baseline, and/or have an Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or 1.
  • LVEF left ventricular ejection fraction
  • ECOG PS Eastern Cooperative Oncology Group performance status
  • the invention concerns a method of treating early-stage HER2-positive breast cancer comprising administering Pertuzumab, Trastuzumab, and chemotherapy to a patient with the breast cancer, wherein the chemotherapy comprises anthracycline-based chemotherapy, or carboplatin-based chemotherapy.
  • the chemotherapy comprises anthracycline-based chemotherapy, e.g. comprising 5-FU, epirubicin, and cyclophosphamide (FEC).
  • the chemotherapy comprises carboplatin-based chemotherapy, e.g. comprising taxane (e.g.
  • Pertuzumab is administered concurrently with the anthracycline-based chemotherapy or with the carboplatin-based chemotherapy, e.g. wherein the Pertuzumab, Trastuzumab and chemotherapy are administered in 3-week cycles with Pertuzumab, Trastuzumab and the chemotherapy being administered on day-1 of each cycle.
  • the data in the examples herein demonstrates that Pertuzumab administration does not increase cardiac toxicity relative to the treatment without Pertuzumab (i.e relative to Trastuzumab with anthrycline-based chemotherapy (e.g.
  • the early-stage HER2-positive breast cancer therapy contemplated herein includes neoadjuvant and adjuvant therapy.
  • the invention herein also concerns a method of treating HER2-positive cancer in a patient comprising co-administering a mixture of Pertuzumab and Trastuzumab from the same intravenous bag to the patient.
  • This embodiment is applicable to treatment of any HER2-positive cancer, including HER2-positive breast cancer, HER2-positive gastric cancer, HER2-positive metastatic or locally recurrent, unresectable breast cancer, or de novo Stage IV disease, early-stage HER2-positive breast cancer, etc.
  • this method further comprises administering chemotherapy to the patient.
  • the treatment methods of the present invention comprise, consist essentially of, or consist of the administration of Pertuzumab, Trastuzumab and a chemotherapy, such as a platin (e.g. cisplatin) and/or a fluoropurimidine (e.g. capecitabine and/or 5-fluorouracil (5-FU)) to treat HER2-positive gastric cancer.
  • a chemotherapy such as a platin (e.g. cisplatin) and/or a fluoropurimidine (e.g. capecitabine and/or 5-fluorouracil (5-FU)) to treat HER2-positive gastric cancer.
  • the treatment methods of the present invention comprise, consist essentially of, or consist of the administration of Pertuzumab, Trastuzumab, and a chemotherapy, such as a platin and/or a fluoropurimidine, e.g. cisplatin and/or capecitabine and/or 5-fluorouracil (5-FU), to a human patient with metastatic gastric cancer, non-resectable locally advanced gastric cancer, or post-operatively recurrent gastric cancer.
  • the gastric cancer is not amenable to curative therapy.
  • a method of treating HER2-positive breast cancer in a patient comprising administering Pertuzumab, Trastuzumab and vinorelbine to the patient.
  • the breast cancer according to this embodiment is optionally metastatic or locally advanced.
  • the patient has not previously received systemic non-hormonal anticancer therapy in the metastatic setting.
  • the invention provides a method of treating HER2-positive breast cancer in a patient comprising administering Pertuzumab, Trastuzumab, and aromatase inhibitor (e.g. anastrazole or letrozole) to the patient.
  • the breast cancer is advanced breast cancer, including hormone receptor-positive breast cancer such as estrogen receptor (ER)-positive and/or progesterone receptor (PgR)-positive breast cancer.
  • ER estrogen receptor
  • PgR progesterone receptor
  • the patient has not previously received systemic nonhormonal anticancer therapy in the metastatic setting.
  • This treatment method optionally further comprises administering induction chemotherapy (e.g. comprising taxane) to the patient.
  • PFS progression-free survival
  • OS overall survival
  • the antibodies and chemotherapeutic treatments are administered to a human patient in accord with known methods. Specific administration schedules and formulations are described in the examples herein.
  • Pertuzumab is administered at a dose that produces a steady-state C min of ⁇ 20 ⁇ g/mL in 90% of patients receiving Pertuzumab and Trastuzumab.
  • a Pertuzumab of approximately 840 mg (loading dose) is administered, followed by one or more doses of approximately 420 mg (maintenance dose(s)) of the antibody.
  • the maintenance doses are preferably administered about every 3 weeks, for a total of at least two doses, until clinical progressive disease, or unmanageable toxicity, preferably up to about 6, or 7, or 8, or 9, or 10, or 11, or 12, or 13, or 14, or 15, or 16, or 17 or more doses. Longer treatment periods, including more treatment cycles, are also contemplated.
  • Pertuzumab is administered at a dose of 840 mg for all treatment cycles.
  • Trastuzumab typically is administered as an intravenous loading dose of about 8 mg/kg, followed by the administration of 6 mg/kg doses in subsequent cycles. Trastuzumab is typically administered every 3 weeks until clinical progressive disease or unmanageable toxicity, preferably up to about 17 or more doses.
  • Trastuzumab is administered as an intravenous (IV) infusion on Day 1 of each treatment cycle until investigator-assessed disease progression or unmanageable toxicity, at a loading dose of 8 mg/kg for Cycle 1 and a dose of 6 mg/kg for subsequent cycles.
  • IV intravenous
  • Pertuzumab is administered as an IV infusion on Day 1 of each cycle, for a total of six cycles or until investigator assessed disease progression or unmanageable toxicity, whichever occurs first, either at a loading dose of 840 mg for Cycle 1 and a dose of 420 mg for the subsequent cycles, or a loading dose of 840 mg for Cycle 1 and a dose of 840 mg for the subsequent cycles.
  • Cisplatin 80 mg/m 2 is typically administered as an IV infusion on Day 1 of each cycle, for a total of at least six cycles.
  • Capecitabine 1000 mg/m 2 is typically administered orally twice daily, from the evening of Day 1 to the morning of Day 15 of each cycle, for a total of at least six cycles.
  • Capecitabine administration may be prolonged at the discretion of the attending clinician after careful risk-benefit assessment for individual patients.
  • an article of manufacture herein comprises an intravenous (IV) bag containing a stable mixture of Pertuzumab and Trastuzumab suitable for administration to a cancer patient.
  • the mixture is in saline solution; for example comprising about 0.9% NaCl or about 0.45% NaCl.
  • An exemplary IV bag is a polyolefin or polyvinyl chloride infusion bag, e.g. a 250 mL IV bag.
  • the mixture includes about 420 mg or about 840 mg of Pertuzumab and from about 200 mg to about 1000 mg of Trastuzumab (e.g. from about 400 mg to about 900 mg of Trastuzumab).
  • the mixture in the IV bag is stable for up to 24 hours at 5° C. or 30° C.
  • Stability of the mixture can be evaluated by one or more assays selected from the group consisting of: color, appearance and clarity (CAC), concentration and turbidity analysis, particulate analysis, size exclusion chromatography (SEC), ion-exchange chromatography (WC), capillary zone electrophoresis (CZE), image capillary isoelectric focusing (iCIEF), and potency assay.
  • assays selected from the group consisting of: color, appearance and clarity (CAC), concentration and turbidity analysis, particulate analysis, size exclusion chromatography (SEC), ion-exchange chromatography (WC), capillary zone electrophoresis (CZE), image capillary isoelectric focusing (iCIEF), and potency assay.
  • the invention provides an article of manufacture comprising a vial with Pertuzumab therein and a package insert, wherein the package insert provides the safety data in Table 3 or Table 4 and/or the efficacy data in Table 2, Table 5, FIG. 8 , or FIG. 10 .
  • the vial is a single-dose vial containing about 420 mg of Pertuzumab.
  • the vial is provided inside a cardboard carton.
  • the invention concerns a method of making an article of manufacture comprising packaging together a vial with Pertuzumab therein and a package insert, wherein the package insert provides the safety data in Table 3 or Table 4 and/or the efficacy data in Table 2, Table 5, FIG. 8 , or FIG. 10 .
  • the invention provides a method of ensuring safe and effective use of Pertuzumab comprising packaging together a vial with Pertuzumab therein and a package insert, wherein the package insert provides the safety data in Table 3 or Table 4 and/or the efficacy data in Table 2, Table 5, FIG. 8 , or FIG. 10 .
  • hybridoma cell lines have been deposited with the American Type Culture Collection, 10801 University Boulevard, Manassas, Va. 20110-2209, USA (ATCC):
  • gastric cancer remains the world's second leading cause of cancer mortality, after lung cancer (Parkin, D. Oncogene 23:6329-40 (2004)).
  • the incidence of gastric cancer varies widely according to geographic region (Kelley et al. J Clin Epidemiol 56:1-9 (2003); Plummer et al. Epidemiology of gastric cancer. In: Butlet et al., editors. Mechanisms of carcinogenesis: contribution of molecular epidemiology. Lyon: IARC Scientific Publications No 157, IARC (2004)). In Japan, Korea, China, and certain countries in Central and South America, the incidence is 20 to 95 cases per 100,000 men.
  • Study B018255 was a randomized, open-label, multicenter, international, comparative Phase III trial designed to evaluate the efficacy and safety of Trastuzumab in combination with chemotherapy compared with chemotherapy alone as first-line therapy in patients with inoperable, locally advanced or recurrent and/or metastatic HER2-positive adenocarcinoma of the stomach or gastroesophageal junction.
  • the primary objective of the study was to compare overall survival for patients treated with Trastuzumab combined with fluoropyrimidine (5-FU or capecitabine) plus cisplatin.
  • the results from Study B018255 demonstrated a significant clinical benefit when Trastuzumab was used in combination with chemotherapy in patients with gastric cancer.
  • Trastuzumab is now indicated, including the EU and United States, in combination with cisplatin plus capecitabine or 5-FU, for the treatment of patients with HER2-positive metastatic gastric or gastroesophageal junction adenocarcinoma who have not received prior treatment for metastatic disease.
  • this example is a randomized, multicenter, open-label study evaluating two different doses of Pertuzumab in patients with HER2-positive adenocarcinoma of the stomach or gastroesophageal junction. Patients are randomized in a 1:1 ratio to two treatment arms.
  • Patients in Arm A receive a Pertuzumab loading dose of 840 mg for Cycle 1 and a dose of 420 mg for Cycles 2-6, and patients in Arm B receive Pertuzumab 840 mg for all six cycles. Patients in both treatment arms receive Trastuzumab, cisplatin, and capecitabine. Study schema are in FIG. 6 . The length of the study is approximately 24 months (4 months for recruitment and 20 months of follow-up after last patient recruited). The end of study will be when progressive disease has occurred in all patients, or all patients have withdrawn or discontinued from the study, whichever is earlier.
  • the trial involves approximately 30 patients.
  • Measurable disease according to the Response Evaluation Criteria in Solid Tumors (RECIST), v1.1, assessed using imaging techniques (computed tomography (CT) or magnetic resonance imaging (MRI)), or non-measurable disease that can be followed.
  • CT computed tomography
  • MRI magnetic resonance imaging
  • HER2-positive tumor defined as either IHC 3+ or IHC 2+ in combination with ISH+, as assessed by central laboratory on primary or metastatic tumor.
  • ISH positivity is defined as a ratio of ⁇ 2.0 for the number of HER2 gene copies to the number of signals for CEP17.
  • FFPE formalin-fixed paraffin-embedded
  • LVEF left ventricular ejection fraction
  • Contraception use must continue for the duration of study treatment and for at least 6 months after the last dose of study medication.
  • Adjuvant or neoadjuvant therapy with a platin is not allowed.
  • Residual relevant toxicity resulting from previous therapy e.g., neurological toxicity of ⁇ Grade ⁇ 2 (NCI CTCAE)
  • NCI CTCAE Neuronal toxicity of ⁇ Grade ⁇ 2
  • Serum total bilirubin >1.5 times the upper limit of normal (ULN) or, for patients with known Gilberts syndrome, serum total bilirubin >2 ⁇ ULN
  • Serious cardiac illness or medical conditions including but not confined to:
  • Atrial tachycardia with a heart rate ⁇ 100/min at rest
  • ventricular arrhythmia ventricular tachycardia
  • higher-grade AV block second-degree AV block Type 2 (Mobitz II) or third-degree AV block
  • Women of childbearing potential must have a negative serum pregnancy test within 7 days prior to randomization, irrespective of the method of contraception used.
  • Treatment cycles are 3 weeks in length.
  • Trastuzumab is administered as an intravenous (IV) infusion on Day 1 of each cycle until investigator-assessed disease progression or unmanageable toxicity, at a loading dose of 8 mg/kg for Cycle 1 and a dose of 6 mg/kg for subsequent cycles.
  • IV intravenous
  • Pertuzumab is administered as an IV infusion on Day 1 of each cycle, for a total of six cycles or until investigator assessed disease progression or unmanageable toxicity, whichever occurs first, as follows for each arm:
  • Arm A Patients receive Pertuzumab at a loading dose of 840 mg for Cycle 1 and a dose of 420 mg for Cycles 2-6.
  • Arm B Patients receive Pertuzumab at 840 mg for Cycles 1-6.
  • Treatment cycles are 3 weeks in length.
  • Cisplatin 80 mg/m 2 is administered as an IV infusion on Day 1 of each cycle, for a total of six cycles.
  • Capecitabine 1000 mg/m 2 is administered orally twice daily, from the evening of Day 1 to the morning of Day 15 of each cycle, for a total of six cycles. (Capecitabine may be prolonged at the discretion of the investigator after careful risk-benefit assessment for individual patients.)
  • Each lot of the recombinant antibodies produced for clinical purposes meets viral safety requirements and the United States Pharmacopeia and the European Pharmacopoeia requirements for sterility. Each lot meets the required specifications for identity, purity, and potency.
  • Pertuzumab is provided as a single-use formulation containing 30 mg/mL Pertuzumab formulated in 20-mM L-histidine-acetate (pH 6.0), 120-mM sucrose, and 0.02% polysorbate 20. Each 20-cc vial (14.0 mL solution per vial) contains approximately 420 mg of Pertuzumab.
  • Investigational Trastuzumab is supplied as a freeze-dried preparation at a nominal content of 150 mg per vial in most countries (vial size varies by country).
  • Trastuzumab is formulated in histidine, trehalose, and polysorbate 20. Once reconstituted, each solution contains 21 mg/mL of active drug at a pH of approximately 6.0.
  • Investigator-assessed tumor response will be used to summarize best overall response at the end of Cycles 3 and 6 for each treatment arm, defined as patients with a complete or partial response as determined by RECIST.
  • trough serum concentration C min
  • PK parameters such as CL, Vss, AUC, and half-life will be estimated. The evaluation of PK parameters from data collected up to Day 43 will enable modeling and simulation for an estimated dose that predicts a steady-state trough of ⁇ 20 ⁇ g/mL in 90% of patients.
  • C max and C min for Trastuzumab will be tabulated and summarized by descriptive statistics for each specified PK sampling timepoint. For all PK analyses, actual times of sample collection (rather than scheduled) will be used.
  • PK parameters (AUC, C max , t1/2) of Pertuzumab will be calculated using non-compartmental methods, and the systemic clearance will be derived from the plasma concentrations via standard methods.
  • the purpose of this study is to assess C min for Pertuzumab at Day 43 in patients receiving two different Pertuzumab dose regimens. These data will then be analyzed using a population PK model to identify a dose of Pertuzumab that will achieve a PK target steady-state trough concentration of 20 ⁇ g/mL in approximately 90% of the advanced gastric cancer patients. Analyses using the assumption that Pertuzumab behaves similarly to Trastuzumab in advanced gastric cancer suggest that with sample size of 15 patients per arm (total of 30 patients in this study), the dose to achieve the desired target concentration can be estimated with an acceptable degree of precision (coefficient of variation ⁇ 15%).
  • FIG. 32 shows the samples taken and time points.
  • FIG. 33 shows the demographics of the patient population in the two arms of the GC study, treated with 420 mg (Arm A) or 840 mg (Arm B) of Pertuzumab.
  • FIG. 34 shows the GC history of the patients in Arms A and B, respectively.
  • FIG. 35 shows the patient disposition in Arms A and B, respectively.
  • FIG. 36 shows the Overall Response Rate in Arms A and B, respectively.
  • Diarrhea was the most common event occurring in 90% of subjects and was typically Grade 1 and 2 with onset in Cycle 1; no patient discontinued therapy because of diarrhea.
  • Grade ⁇ 3 adverse events included diarrhea, stomatitis, fatigue/asthenia, decreased appetite, hyponatremia, anemia, and neutopenia. With the exception of neutropenia and hyponatremia (higher in Arm A) and decreased appetite (higher in Arm B), incidence of these events was similar in the standard and high-dose Pertuzumab arms.
  • EF ejection fraction
  • neutropenic fever neutropenic fever
  • rash rash
  • drug hypersensitivity reaction drug hypersensitivity reaction
  • SAEs Serious adverse events
  • FIG. 37 shows the results of Pertuzumab Day 42 concentration assessment in gastric cancer (GC) (JOSHUA) versus metastatic breast cancer (MBC) (CLEOPATRA).
  • 840/840 mg dose will be used for the treatment of gastric cancer. This dose is expected to maintain trough levels above the target of >20 ⁇ g/mL in 90% of patients, and provides similar trough levels as those observed in MBC.
  • Patients in the treatment arm receive Trastuzumab, cisplatin, and capecitabine and/or 5-fluorouracil. In the other arm, patients are given either placebo or Pertuzumab.
  • PFS Progression-free survival
  • TTP time to disease progression
  • ORR objective response rate
  • Clinical Benefit Rate Duration of Response
  • Qol safety
  • pain intensity analgesic consumption
  • weight change pharmacokinetics
  • the treatment methods described herein comprising the administration of Pertuzumab, Trastuzumab and chemotherapy(s), e.g. cisplatin and capecitabine, will meet the primary end point (OS).
  • OS overall survival
  • PFS progression-free survival
  • TTP time to disease progression
  • ORR objective response rate
  • PFS progression-free survival
  • PD first documented radiographic progressive disease
  • RECIST solid tumors
  • Eligible patients had centrally confirmed HER2-positive (defined as immunohistochemistry (IHC) 3+ and/or fluorescence in situ hybridization (FISH) amplification ratio ⁇ 2.0) (Carlson et al. J Natl Compr Canc. Netw 4 Suppl 3:S1-22 (2006)), locally recurrent, unresectable, or metastatic breast cancer, or de novo Stage IV disease.
  • Patients were aged ⁇ 18 years, had a left ventricular ejection fraction (LVEF) of ⁇ 50% at baseline (determined by echocardiogram or multiple gated acquisition), and an Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or 1.
  • LVEF left ventricular ejection fraction
  • ECOG PS Eastern Cooperative Oncology Group performance status
  • Patients may have received one hormonal treatment for MBC prior to randomization, or neoadjuvant or adjuvant systemic breast cancer therapy including Trastuzumab and/or taxanes, provided that they experienced a disease-free interval of ⁇ 12 months between completion of neoadjuvant or adjuvant therapy and diagnosis of metastatic disease.
  • Exclusion criteria included therapy for MBC (other than described above); central nervous system metastases; history of exposure to a cumulative dose of doxorubicin >360 mg/m 2 or its equivalent; history of LVEF decline to ⁇ 50% during or after prior Trastuzumab therapy; current uncontrolled hypertension; history of impaired cardiac function; impaired bone marrow, renal, or liver function; current known infection with HIV, HBV, or HCV; pregnancy; lactation; and refusal to use non-hormonal contraception.
  • Docetaxel was administered every 3 weeks at a starting dose of 75 mg/m 2 , escalating to 100 mg/m 2 if tolerated. Per protocol, the investigator could reduce the dose by 25% to 55 mg/m 2 or 75 mg/m 2 (if the patient had been dose escalated) in order to manage tolerability. It was recommended that patients received at least 6 cycles of Docetaxel.
  • Pertuzumab or placebo was given at a fixed loading dose of 840 mg, followed by 420 mg every 3 weeks until investigator-assessed radiographic or clinical PD, or unmanageable toxicity. In the case of chemotherapy discontinuation due to cumulative toxicity, antibody therapy was continued until PD, unacceptable toxicity, or withdrawal of consent. All drugs were administered intravenously.
  • PFS was evaluated by standard RECIST-accepted methodology every 9 weeks by each center and by the IRF until IRF-assessed PD.
  • Assessments of LVEF were performed at baseline, every 9 weeks during the treatment period, at treatment discontinuation, every 6 months in the first year after treatment discontinuation, then annually for up to 3 years in the follow-up period. Laboratory parameters and ECOG status were assessed at every cycle.
  • Adverse events (AEs) were monitored continuously and graded according to NCI-CTCAE version 3.0. All cardiac events and serious adverse events (SAEs) that were ongoing at the time of treatment discontinuation were followed until resolution or stabilization up to 1 year after the final dose. Cardiac events and treatment-related SAEs with onset post-treatment
  • the median number of cycles administered per patient was 15 and 18 with median time on treatment estimated to be 11.8 and 18.1 months for placebo plus Trastuzumab plus Docetaxel and for Pertuzumab plus Trastuzumab plus Docetaxel, respectively. Dose reductions were not permitted for placebo, Pertuzumab, or Trastuzumab.
  • Patients received a median of eight cycles of Docetaxel in each arm. Based on the safety population, 61 (15.4%) patients in the placebo plus Trastuzumab plus Docetaxel arm received Docetaxel dose escalation to 100 mg/m 2 at any cycle compared with 48 (11.8%) patients in the Pertuzumab plus Trastuzumab plus Docetaxel arm.
  • the median Docetaxel dose intensity was 24.8 mg/m 2 /week in the placebo plus Trastuzumab plus Docetaxel arm and 24.6 mg/m 2 /week in the Pertuzumab plus Trastuzumab plus Docetaxel arm.
  • Reasons for permanent discontinuation of all study treatment are presented in FIG. 7 .
  • the AE profile during the treatment period was generally balanced between treatment arms (Table 3).
  • the incidence of the following AEs was >5% higher with Pertuzumab plus Trastuzumab plus Docetaxel: diarrhea, rash, mucosal inflammation, febrile neutropenia, and dry skin.
  • the incidence of the following grade ⁇ 3 AEs was >2% higher with Pertuzumab plus Trastuzumab plus Docetaxel: neutropenia, febrile neutropenia, and diarrhea (Table 3).
  • the incidence of grade ⁇ 3 febrile neutropenia in patients from Asia was 12% in the placebo plus Trastuzumab plus Docetaxel arm and 26% in the Pertuzumab plus Trastuzumab plus Docetaxel arm; in all other geographical regions the incidence was ⁇ 10% in both arms.
  • LVSD (all grades) was reported more frequently in the placebo plus Trastuzumab plus Docetaxel arm compared with the Pertuzumab plus Trastuzumab plus Docetaxel arm (8.3% and 4.4%, respectively). Grade ⁇ 3 LVSD was reported in 2.8% of patients receiving placebo plus Trastuzumab plus Docetaxel and in 1.2% of patients receiving Pertuzumab plus Trastuzumab plus Docetaxel.
  • LVEF declines of ⁇ 10 percentage points from baseline to ⁇ 50% at any stage during treatment were reported in 6.6% and 3.8% of patients in the placebo plus Trastuzumab plus Docetaxel arm and Pertuzumab plus Trastuzumab plus Docetaxel arm, respectively.
  • Pertuzumab-related AEs including skin rash, mucosal inflammation, and dry skin, were mostly mild. There was an increased rate of grade ⁇ 3 diarrhea and febrile neutropenia with Pertuzumab plus Trastuzumab plus Docetaxel treatment.
  • the control arm in CLEOPATRA had a similar PFS to previous randomized studies that showed that the combination of Trastuzumab and Docetaxel in HER2-positive MBC had a median PFS of 11.7 months Marty et al. J Clin Oncol 23:4265-74 (2005).
  • phase III clinical data in Example 3 were used in the development of an article of manufacture comprising a vial (e.g. single-dose vial) with Pertuzumab therein and a package insert providing information about the safety and/or efficacy thereof, as well as a method of making an article of manufacture comprising packaging together Pertuzumab in a vial (e.g. single-dose vial) and a package insert with prescribing information regarding Pertuzumab on a package insert as herein below.
  • a vial e.g. single-dose vial
  • a package insert providing information about the safety and/or efficacy thereof
  • a method of making an article of manufacture comprising packaging together Pertuzumab in a vial (e.g. single-dose vial) and a package insert with prescribing information regarding Pertuzumab on a package insert as herein below.
  • Pertuzumab is a sterile, clear to slightly opalescent, colorless to pale yellow liquid for IV infusion. Each single use vial contains 420 mg of Pertuzumab at a concentration of 30 mg/mL in 20 mM L-histidine acetate (pH 6.0), 120 mM sucrose and 0.02% polysorbate 20. Pertuzumab is supplied in a single-dose vial containing preservative free liquid concentrate, at a concentration of 30 mg/mL ready for infusion. Each vial of Pertuzumab drug product contains a total of 420 mg Pertuzumab. Store vials in a refrigerator at 2° C. to 8° C. (36° F. to 46° F.) until time of use. Keep vial in the outer carton in order to protect from light.
  • PERTUZUMAB Exposure to PERTUZUMAB can result in embryo-fetal death and birth defects. Studies in animals have resulted in oligohydramnios, delayed renal development, and death. Advise patients of these risks and the need for effective contraception. (5.1, 8.1, 8.6)
  • Pertuzumab is indicated for use in combination with Trastuzumab and docetaxel for the treatment of patients with HER2-positive metastatic breast cancer who have not received prior anti-HER2 therapy or chemotherapy for metastatic disease.
  • the initial dose of Pertuzumab is 840 mg administered as a 60-minute intravenous infusion, followed every 3 weeks thereafter by a dose of 420 mg administered as an intravenous infusion over 30 to 60 minutes.
  • the recommended initial dose of Trastuzumab is 8 mg/kg administered as a 90-minute intravenous infusion, followed every 3 weeks thereafter by a dose of 6 mg/kg administered as an intravenous infusion over 30 to 90 minutes.
  • the recommended initial dose of docetaxel is 75 mg/m2 administered as an intravenous infusion. The dose may be escalated to 100 mg/m2 administered every 3 weeks if the initial dose is well tolerated.
  • the 420 mg dose of Pertuzumab should be administered. Do not wait until the next planned dose. If the time between two sequential infusions is 6 weeks or more, the initial dose of 840 mg Pertuzumab should be re-administered as a 60-minute intravenous infusion followed every 3 weeks thereafter by a dose of 420 mg administered as an intravenous infusion over 30 to 60 minutes.
  • the infusion rate of Pertuzumab may be slowed or interrupted if the patient develops an infusion-associated reaction. The infusion should be discontinued immediately if the patient experiences a serious hypersensitivity reaction [see Warnings and Precautions (5.2)].
  • Pertuzumab may be resumed if the LVEF has recovered to greater than 45% or to 40% to 45% associated with less than a 10% absolute decrease below pretreatment values.
  • Pertuzumab should be withheld or discontinued if Trastuzumab treatment is withheld or discontinued. If docetaxel is discontinued, treatment with Pertuzumab and Trastuzumab may continue. Dose reductions are not recommended for Pertuzumab. For docetaxel dose modifications, see docetaxel prescribing information.
  • Pertuzumab can cause fetal harm when administered to a pregnant woman. Treatment of pregnant cynomolgus monkeys with Pertuzumab resulted in oligohydramnios, delayed fetal kidney development, and embryo-fetal death. If Pertuzumab is administered during pregnancy, or if the patient becomes pregnant while receiving this drug, the patient should be apprised of the potential hazard to a fetus [see Use in Specific Populations (8.1)]. Verify pregnancy status prior to the initiation of Pertuzumab. Advise patients of the risks of embryo-fetal death and birth defects and the need for contraception during and after treatment, Advise patients to contact their healthcare provider immediately if they suspect they may be pregnant.
  • Pertuzumab is administered during pregnancy or if a patient becomes pregnant while receiving Pertuzumab, immediately report exposure to the Genentech Adverse Event Line at 1-888-835-2555. Encourage women who may be exposed during pregnancy to enroll in the MotHER Pregnancy Registry by contacting 1-800-690-6720 [see Patient Counseling Information (17)]. Monitor patients who become pregnant during Pertuzumab therapy for oligohydramnios. If oligohydramnios occurs, perform fetal testing that is appropriate for gestational age and consistent with community standards of care. The efficacy of intravenous hydration in the management of oligohydramnios due to Pertuzumab exposure is not known.
  • LVEF left ventricular systolic dysfunction
  • Symptomatic left ventricular systolic dysfunction occurred in 1.0% of patients in the Pertuzumab-treated group and 1.8% of patients in the placebo-treated group [see Adverse Reactions (6.1)]. Patients who have received prior anthracyclines or prior radiotherapy to the chest area may be at higher risk of decreased LVEF.
  • Pertuzumab has not been studied in patients with a pretreatment LVEF value of ⁇ 50%, a prior history of CHF, decreases in LVEF to ⁇ 50% during prior Trastuzumab therapy, or conditions that could impair left ventricular function such as uncontrolled hypertension, recent myocardial infarction, serious cardiac arrhythmia requiring treatment or a cumulative prior anthracycline exposure to >360 mg/m 2 of doxorubicin or its equivalent. Assess LVEF prior to initiation of Pertuzumab and at regular intervals (e.g., every three months) during treatment to ensure that LVEF is within the institution's normal limits.
  • LVEF is ⁇ 40%, or is 40% to 45% with a 10% or greater absolute decrease below the pretreatment value, withhold Pertuzumab and Trastuzumab and repeat LVEF assessment within approximately 3 weeks. Discontinue Pertuzumab and Trastuzumab if the LVEF has not improved or has declined further, unless the benefits for the individual patient outweigh the risks [see Dosage and Administration (2,2)].
  • Pertuzumab has been associated with infusion and hypersensitivity reactions [see Adverse Reactions (6.1)].
  • An infusion reaction was defined in the randomized trial as any event described as hypersensitivity, anaphylactic reaction, acute infusion reaction or cytokine release syndrome occurring during an infusion or on the same day as the infusion.
  • the initial dose of Pertuzumab was given the day before Trastuzumab and docetaxel to allow for the examination of Pertuzumab-associated reactions.
  • the overall frequency of infusion reactions was 13.0% in the Pertuzumab-treated group and 9.8% in the placebo-treated group. Less than 1% were grade 3 or 4.
  • the most common infusion reactions ( ⁇ 1.0%) were pyrexia, chills, fatigue, headache, asthenia, hypersensitivity, and vomiting.
  • the most common infusion reactions in the Pertuzumab-treated group ( ⁇ 1.0%) were fatigue, dysgeusia, hypersensitivity, myalgia, and vomiting.
  • the overall frequency of hypersensitivity/anaphylaxis reactions was 10.8% in the Pertuzumab-treated group and 9.1% in the placebo-treated group.
  • HER2 protein overexpression is necessary for selection of patients appropriate for Pertuzumab therapy because these are the only patients studied and for whom benefit has been shown [see Indications and Usage (1) and Clinical Studies (14)].
  • patients with breast cancer were required to have evidence of HER2 overexpression defined as 3+ IHC by Dako HERCEPTEST® or FISH amplification ratio ⁇ 2.0 by Dako HER2FISH PHARMDXTM test kit.
  • Only limited data were available for patients whose breast cancer was positive by FISH, but did not demonstrate protein overexpression by IHC.
  • Assessment of HER2 status should be performed by laboratories with demonstrated proficiency in the specific technology being utilized. Improper assay performance, including use of sub-optimally fixed tissue, failure to utilize specified reagents, deviation from specific assay instructions, and failure to include appropriate controls for assay validation, can lead to unreliable results.
  • Pertuzumab has been evaluated in more than 1400 patients with various malignancies and treatment with Pertuzumab was predominantly in combination with other anti-neoplastic agents.
  • the adverse reactions described in Table 4 were identified in 804 patients with HER2-positive metastatic breast cancer treated in the randomized trial. Patients were randomized to receive either Pertuzumab in combination with Trastuzumab and docetaxel or placebo in combination with Trastuzumab and docetaxel. The median duration of study treatment was 18.1 months for patients in the Pertuzumab-treated group and 11.8 months for patients in the placebo-treated group. No dose adjustment was permitted for Pertuzumab or Trastuzumab. The rates of adverse events resulting in permanent discontinuation of all study therapy were 6.1% for patients in the Pertuzumab-treated group and 5.3% for patients in the placebo-treated group.
  • NCI—CTCAE version 3-4 adverse reactions (>2%) were neutropenia, febrile neutropenia, leukopenia, diarrhea, peripheral neuropathy, anemia, asthenia, and fatigue.
  • An increased incidence of febrile neutropenia was observed for Asian patients in both treatment arms compared with patients of other races and from other geographic regions.
  • Asian patients the incidence of febrile neutropenia was higher in the Pertuzumab-treated group (26%) compared with the placebo-treated group (12%).
  • Skin and subcutaneous tissue disorders Paronychia (7.1% in the Pertuzumab-treated group vs. 3.5% in the placebo-treated group); Respiratory, thoracic and mediastinal disorders: Pleural effusion (5.2% in the Pertuzumab-treated group vs. 5.8% in the placebo-treated group); Cardiac disorders: Left ventricular dysfunction (4.4% in the Pertuzumab-treated group vs. 8.3% in the placebo-treated group) including symptomatic left ventricular systolic dysfunction (CHF) (1.0% in the Pertuzumab-treated group vs. 1.8% in the placebo-treated group); Immune system disorders: Hypersensitivity (10.1% in the Pertuzumab-treated group vs. 8.6% in placebo-treated group).
  • Pertuzumab As with all therapeutic proteins, there is the potential for an immune response to Pertuzumab. Patients in the randomized trial were tested at multiple time-points for antibodies to Pertuzumab. Approximately 2.8% ( 11/386) of patients in the Pertuzumab-treated group and 6.2% ( 23/372) of patients in the placebo-treated group tested positive for anti-Pertuzumab antibodies. Of these 34 patients, none experienced anaphylactic/hypersensitivity reactions that were clearly related to the anti-therapeutic antibodies (ATA). The presence of Pertuzumab in patient serum at the levels expected at the time of ATA sampling can interfere with the ability of this assay to detect anti-Pertuzumab antibodies. In addition, the assay may be detecting antibodies to Trastuzumab.
  • Pertuzumab can cause fetal harm when administered to a pregnant woman.
  • the effects of Pertuzumab are likely to be present during all trimesters of pregnancy.
  • Pertuzumab administered to pregnant cynomolgus monkeys resulted in oligohydramnios, delayed fetal kidney development, and embryo-fetal deaths at clinically relevant exposures of 2.5 to 20-fold greater than the recommended human dose, based on C max . If Pertuzumab is administered during pregnancy, or if a patient becomes pregnant while receiving Pertuzumab, the patient should be apprised of the potential hazard to the fetus.
  • Pertuzumab is administered during pregnancy or if a patient becomes pregnant while receiving Pertuzumab, immediately report exposure to the Genentech Adverse Event Line at 1-888-835-2555. Encourage women who may be exposed during pregnancy to enroll in the MotHER Pregnancy Registry by contacting 1-800-690-6720 [see Patient Counseling Information (17)].
  • Pertuzumab is excreted in human milk, but human IgG is excreted in human milk. Because many drugs are secreted in human milk and because of the potential for serious adverse reactions in nursing infants from Pertuzumab, a decision should be made whether to discontinue nursing, or discontinue drug, taking into account the elimination half-life of Pertuzumab and the importance of the drug to the mother [See Warnings and Precautions (5.1), Clinical Pharmacology (12.3)].
  • Pertuzumab can cause embryo-fetal harm when administered during pregnancy. Counsel patients regarding pregnancy prevention and planning. Advise females of reproductive potential to use effective contraception while receiving Pertuzumab and for 6 months following the last dose of Pertuzumab. If Pertuzumab is administered during pregnancy or if a patient becomes pregnant while receiving Pertuzumab, immediately report exposure to the Genentech Adverse Event Line at 1-888-835-2555. Encourage women who may be exposed during pregnancy to enroll in the MotHER Pregnancy Registry by contacting 1-800-690-6720 [see Patient Counseling Information (17)].
  • Pertuzumab Dose adjustments of Pertuzumab are not needed in patients with mild (creatinine clearance [CLcr] 60 to 90 mL/min) or moderate (CLcr 30 to 60 mL/min) renal impairment. No dose adjustment can be recommended for patients with severe renal impairment (CLcr less than 30 mL/min) because of the limited pharmacokinetic data available [see Clinical Pharmacology (12.3)].
  • Pertuzumab is a recombinant humanized monoclonal antibody that targets the extracellular dimerization domain (Subdomain II) of the human epidermal growth factor receptor 2 protein (HER2).
  • Pertuzumab is produced by recombinant DNA technology in a mammalian cell (Chinese Hamster Ovary) culture containing the antibiotic, gentamicin. Gentamicin is not detectable in the final product.
  • Pertuzumab has an approximate molecular weight of 148 kDa.
  • Pertuzumab is a sterile, clear to slightly opalescent, colorless to pale brown liquid for intravenous infusion. Each single use vial contains 420 mg of Pertuzumab at a concentration of 30 mg/mL in 20 mM L-histidine acetate (pH 6.0), 120 mM sucrose and 0.02% polysorbate 20.
  • Pertuzumab targets the extracellular dimerization domain (Subdomain II) of the human epidermal growth factor receptor 2 protein (HER2) and, thereby, blocks ligand-dependent heterodimerization of HER2 with other HER family members, including EGFR, HER3 and HER4.
  • Pertuzumab inhibits ligand-initiated intracellular signaling through two major signal pathways, mitogen-activated protein (MAP) kinase and phosphoinositide 3-kinase (PI3K). Inhibition of these signaling pathways can result in cell growth arrest and apoptosis, respectively.
  • MAP mitogen-activated protein
  • PI3K phosphoinositide 3-kinase
  • ADCC antibody-dependent cell-mediated cytotoxicity
  • Pertuzumab demonstrated linear pharmacokinetics at a dose range of 2-25 mg/kg. Based on a population PK analysis that included 481 patients, the median clearance (CL) of Pertuzumab was 0.24 L/day and the median half-life was 18 days. With an initial dose of 840 mg followed by a maintenance dose of 420 mg every three weeks thereafter, the steady-state concentration of Pertuzumab was reached after the first maintenance dose. The population PK analysis suggested no PK differences based on age, gender, and ethnicity (Japanese vs. non-Japanese). Baseline serum albumin level and lean body weight as covariates only exerted a minor influence on PK parameters.
  • the randomized trial was a multicenter, double-blind, placebo-controlled trial of 808 patients with HER2-positive metastatic breast cancer.
  • Breast tumor specimens were required to show HER2 overexpression defined as 3+ IHC or FISH amplification ratio ⁇ 2.0 determined at a central laboratory.
  • Patients were randomized 1:1 to receive placebo plus Trastuzumab and docetaxel or Pertuzumab plus Trastuzumab and docetaxel. Randomization was stratified by prior treatment (prior or no prior adjuvant/neoadjuvant anti-HER2 therapy or chemotherapy) and geographic region (Europe, North America, South America, and Asia).
  • Pertuzumab was given intravenously at an initial dose of 840 mg, followed by 420 mg every 3 weeks thereafter.
  • Trastuzumab was given intravenously at an initial dose of 8 mg/kg, followed by 6 mg/kg every 3 weeks thereafter.
  • Patients were treated with Pertuzumab and Trastuzumab until progression of disease, withdrawal of consent, or unacceptable toxicity.
  • Docetaxel was given as an initial dose of 75 mg/m 2 by intravenous infusion every 3 weeks for at least 6 cycles. The docetaxel dose could be escalated to 100 mg/m 2 at the investigator's discretion if the initial dose was well tolerated.
  • the mean number of cycles of study treatment administered was 16.2 in the placebo-treated group and 19.9 in the Pertuzumab-treated group.
  • PFS progression-free survival
  • IRF independent review facility
  • Tumor prognostic characteristics including hormone receptor status (positive 48%, negative 50%), presence of visceral disease (78%) and non-visceral disease only (22%) were similar in the study arms. Approximately half of the patients received prior adjuvant or neoadjuvant anti-HER2 therapy or chemotherapy (placebo 47%, Pertuzumab 46%). Among patients with hormone receptor positive tumors, 45% received prior adjuvant hormonal therapy and 11% received hormonal therapy for metastatic disease. Eleven percent of patients received prior adjuvant or neoadjuvant Trastuzumab.
  • the results for investigator-assessed PFS were comparable to those observed for IRF-assessed PFS.
  • Pertuzumab is supplied as a 420 mg/14 mL (30 mg/mL) single-use vial containing preservative-free solution. NDC 50242-145-01. Store vials in a refrigerator at 2° C. to 8° C. (36° F. to 46° F.) until time of use. Keep vial in the outer carton in order to protect from light.
  • the comprehensive phase III safety and efficacy data for Pertuzumab as in Example 3 provide for the article of manufacture in this example.
  • This article of manufacture can be used in a method of ensuring safe and effective use of Pertuzumab to treat patients.
  • Anthracyclines (generally used in combination with 5-FU and cyclophosphamide) have a central role in the management of breast cancer. Romond et al. NEJM 353(16): 1673-1684 (2005), and Poole et al. NEJM 355 (18): 1851-1852 (2006).
  • Taxanes are also integral in standard regimens for the treatment of breast cancer, used in combination with anthracyclines in a regimen known as TAC (Martin et al. NEJM 352 (22): 2302-2313 (2005)) or in sequence with anthracyclines in a regimen known as AC->T (Romond et al., supra; Joensuu et al. NEJM 354 (8): 809-820 (2006)).
  • Carboplatin is both an active and well tolerated chemotherapy agent and there are studies in breast cancer which show clear efficacy in combination with a taxane and Trastuzumab in a regimen known as TCH (Slamon et al. BCIRG 006. SABS (2007); Robert et al. J. Clin. Oncol. 24: 2786-2792 (2006)).
  • TCH a taxane and Trastuzumab in a regimen known as TCH
  • TCH Taxane and Trastuzumab in a regimen known as TCH
  • TCH Taxane and Trastuzumab in a regimen known as TCH
  • metastatic breast cancer there are negative data (Forbes et al. BCIRG 007 Proc. Am. Soc. Clin. Oncol . Abstract No. LBA516 (2006)).
  • 5-Fluorouracil 500 mg/m 2
  • epirubicin 100 mg/m 2
  • cyclophosphamide 600 mg/m 2
  • Docetaxel for three cycles with Trastuzumab (8 mg/kg on day 1 of the first treatment with epirubicin and 6 mg/kg every 3 weeks thereafter) and Pertuzumab (840 mg on day 1 of the treatment with FEC with 420 mg every 3 weeks thereafter).
  • the starting dose for Docetaxel is 75 mg/m 2 for Cycle 4 (first Docetaxel cycle) then 100 mg/m 2 for Cycles 5-6, if no dose limiting toxicity occurs. All drugs will be administered by the IV route.
  • 5-Fluorouracil 500 mg/m 2
  • epirubicin 100 mg/m 2
  • cyclophosphamide 600 mg/m 2
  • Docetaxel for three cycles with Trastuzumab (8 mg/kg on day 1 of the first treatment with Docetaxel and 6 mg/kg every 3 weeks thereafter) and Pertuzumab (840 mg on day 1 on the first day of Docetaxel with 420 mg every 3 weeks thereafter).
  • the starting dose for Docetaxel is 75 mg/m 2 for Cycle 4 (first Docetaxel cycle) then 100 mg/m 2 for Cycles 5-6, if no dose limiting toxicity occurs. All drugs will be administered by the IV route.
  • Taxane Docetaxel
  • Carboplatin Carboplatin
  • Trastuzumab TH
  • Pertuzumab both antibodies being given from the start of the chemotherapy.
  • Carboplatin (AUC6 using Calvert's Formula) followed by Docetaxel on day 1 with Trastuzumab (8 mg/kg on day 1 of the first treatment with Carboplatin and Docetaxel and 6 mg/kg every 3 weeks thereafter) and Pertuzumab (840 mg on day 1 with 420 mg every 3 weeks thereafter) for six cycles.
  • the dose for Docetaxel is 75 mg/m 2 for all cycles. All drugs will be administered by the IV route.
  • the primary objective was evaluated when all patients had received six cycles of neoadjuvant treatment, had their surgery and all necessary samples taken or were withdrawn from the study whichever is earlier.
  • patients After the completion of surgery (and after the completion of post-operative chemotherapy if required), patients received radiotherapy as per local clinical standard and those patients whose tumors were estrogen-receptor positive received hormone manipulation as per local clinical standard.
  • Final Visit Patients whose neoadjuvant study treatment was discontinued prior to surgery were managed as per local practice. Approximately 28 days after the last dose of study medication, patients were asked to perform a final safety assessment (called Final Visit).
  • Concomitant treatments are any prescription medications, over-the-counter preparations, herbal remedies or radiotherapy used by a patient in the interval beginning 7 days prior to the patient being recruited into the study and continuing through the study.
  • Drug 2 (2.8) — 2 (2.6) hypersensitivity
  • FEC 5-fluorouracil, epirubicin, cyclophosphamide
  • H Trastuzumab
  • P Pertuzumab
  • T Docetaxel
  • TCH Docetaxel/Carboplatin/Trastuzumab
  • Efficacy data are provided in FIGS. 13 and 14 as well as Tables 9 and 10 below.
  • Pertuzumab was administered by intravenous (IV) infusion in saline IV bags to patients with HER2-positive metastatic breast cancer followed by Trastuzumab and the chemotherapeutic agent Docetaxel also using saline IV infusions.
  • IV infusion process for Pertuzumab and Trastuzumab takes approximately 60 to 90 minutes each with a 30 to 60 minute patient observation period after each drug. Due to this treatment regimen per patient, a visit can take up to 7.5 hours total.
  • As medical payments for both drugs and drug administration services have been under scrutiny in the recent past, there has been emphasis on business practices to shorten time and to increase medical resource utilization in clinical and hospital settings. Increased efficiency of patient care, compliance and treatment is expected by shortening the time patients spend in the clinic for each cycle of treatment.
  • Pertuzumab and Trastuzumab are administered through intravenous (IV) infusion to patients sequentially, i.e. one drug after the other. While Pertuzumab is given as a flat dose (420 mg for maintenance, 840 mg for loading), Trastuzumab is weight based (6 mg/kg for maintenance doses). To increase convenience and minimize the in-clinic time for the patients, the feasibility of co-administering Pertuzumab with Trastuzumab in a single 250 mL 0.9% saline polyolefin (PO) or polyvinyl chloride (PVC) IV infusion bag was assessed.
  • PO polyolefin
  • PVC polyvinyl chloride
  • Pertuzumab alone in an IV bag, Trastuzumab alone in an IV bag) and the monoclonal antibody (mAb) mixture samples were assessed using the existing Pertuzumab and Trastuzumab analytical methods, which include color, appearance and clarity (CAC), concentration and turbidity by UV-spec scan, particulate analysis by HIAC-Royco, size exclusion chromatography (SEC), and ion-exchange chromatography (IEC).
  • CAC color, appearance and clarity
  • concentration and turbidity by UV-spec scan include color, appearance and clarity (CAC), concentration and turbidity by UV-spec scan, particulate analysis by HIAC-Royco, size exclusion chromatography (SEC), and ion-exchange chromatography (IEC).
  • CZE capillary zone electrophoresis
  • iCIEF image capillary isoelectric focusing
  • potency the Pertuzumab anti-proliferation assay only
  • Results showed no observable differences by the above assays in the Pertuzumab/Trastuzumab mixtures between the time zero (T0) control and the sample stored up to 24 hours at either 5° C. or 30° C.
  • the physicochemical assays as listed above were able to detect both molecules as well as the minor variants in the drug mixture, though some overlaps of monoclonal antibody species were seen in the chromatograms.
  • the drug mixture tested by the Pertuzumab specific inhibition of cell proliferation assay showed comparable potency before and after storage.
  • the results from this study showed the Pertuzumab and Trastuzumab admixtures are physically and chemically stable in an IV infusion bag for up to 24 hours at 5° C. or 30° C. and can be used for clinical administration if necessary.
  • Trastuzumab was reconstituted with 20 mL of bacteriostatic water for injection (BWFI) and left on lab bench for approximately 15 minutes prior to use.
  • BWFI bacteriostatic water for injection
  • 14 mL of Pertuzumab (420 mg) was diluted directly into the IV infusion bag that contained a nominal 250 mL ( ⁇ 25 mL overage) 0.9% saline solution, without removing an equal amount of saline, followed by 20 mL of the reconstituted Trastuzumab (420 mg) using an 18 gauge needle at room temperature.
  • the total concentration of the two proteins combined in the 250 mL IV bag was expected to be approximately 3 mg/mL.
  • the Pertuzumab (420 mg) alone IV bag was prepared with 14 mL of the 30 mg/mL drug product directly diluted into an IV infusion bag. The final expected concentration was approximately 1 mg/mL.
  • the Trastuzumab (420 mg) alone IV infusion bag was also prepared in the same manner except 20 mL of the 21 mg/mL drug product was added into the bag. The final expected concentration was approximately 1 mg/mL.
  • the PO IV bags were manually mixed thoroughly by a gentle back and forth rocking motion several times to ensure homogeneity. After mixing, 10 mL of sample was removed with a syringe from each bag and stored in sterile 15 cc falcon tubes to be used as the diluted sample control at time zero (T0). The IV bags were then stored covered in foil at 30° C. for 24 hours (T24). Immediately after storage, the remainder of the sample was removed with a syringe from each bag and placed into sterile 250 mL PETG containers. The T0 and T24 samples were held for up to 24 hours at 5° C.
  • Sample preparation The upper range of the mAb co-administration dose was examined (1560 mg total mixture: 840 mg Pertuzumab and 720 mg Trastuzumab) in PO and PVC IV infusion bag samples. In the event that an increase in protein aggregation is observed, the propensity of the formation of high molecular weight species (HMWS) would more likely occur at the upper dose of 1560 mg total mAb rather than the mixture containing 840 mg. To mitigate the risk during in-use conditions at the high dose range, both PO and PVC IV infusion bags were studied to ensure no interactions were seen.
  • HMWS high molecular weight species
  • the Pertuzumab/Trastuzumab mixture contained 28 mL of Pertuzumab (840 mg) diluted directly into either PO or PVC IV infusion bags followed by 34 mL of the reconstituted Trastuzumab (720 mg) using an 18 gauge needle at room temperature.
  • the total concentration of the two mAbs combined in a single 250 mL IV bag was expected to be approximately 5 mg/mL.
  • Pertuzumab and Trastuzumab alone IV infusion bag samples were prepared and handled similar to the dose I study, except 28 mL of 30 mg/mL Pertuzumab and 34 mL of 21 mg/mL Trastuzumab was directly diluted into each PO or PVC IV infusion bag. The final expected concentration was approximately 3 mg/mL for the Pertuzumab (840 mg) and Trastuzumab (720 mg) alone samples.
  • the bags were stored uncovered at either 5° C. or 30° C. for up to 24 hours.
  • the T0 and T24 samples were analyzed immediately or held for up to 24 to 48 hours at 5° C. by CAC, UV-spec scan (concentration and turbidity), SEC, IEC, and HIAC-Royco.
  • CAC UV spec scan approx 5 mg/mL 34 mL T ( ⁇ 21 mg/mL) 30° C.
  • the color, appearance, and clarity of the samples were determined by visual inspection under a white fluorescence light with black and white background at room temperature.
  • a 3 cc glass vial was filled with 1 mL of each sample for CAC testing.
  • a negative control (purified water) with the corresponding sample volume was used for comparison.
  • the concentration was determined by measurement of the UV-absorbance on an HP8453 spectrophotometer via volumetric sample preparation. The instrument was blanked with 0.9% saline. Absorbance at A rnax (278 nm or 279 nm) and 320 nm in a quartz cuvette with 1-cm path length were measured for each sample. The absorbance at 320 nm is used to correct for background light scattering in solution. The concentration determination was calculated by using the absorptivity of 1.50 (mg/mL) ⁇ 1 cm ⁇ 1 for both Pertuzumab and Trastuzumab molecules.
  • Each sample was injected into a TOSOHAAS® column G3000 SWXL, 7.8 ⁇ 300 mm at ambient temperature on an AGILENT 1100® HPLC. The eluted peaks were monitored at 280 nm. Chromatographic integrations were analyzed by the CHROMELEON® software. The autosampler temperature was held at 2-8° C. throughout the run and mobile phases used were 0.2M potassium phosphate, 0.25 mM potassium chloride, pH 6.2 and 100 mM potassium phosphate, pH 6.8 for Pertuzumab-assay and Trastuzumab-assay, respectively. The recommended injection load as specified by the test procedure was 200 ⁇ g with an injection volume of 20 ⁇ L.
  • the diluted 420 mg sample was injected at a load less than the recommended amount due to the low concentration of the protein after dilution in the IV bags.
  • the maximum injection volume of the HPLC sample loop was 100 ⁇ L, which limits the volume that is able to be injected at one time.
  • the injection volumes were modified to 100 ⁇ L at 160 ⁇ g protein for the Pertuzumab alone and Trastuzumab alone samples (420 mg dose group) and 73 ⁇ L at 200 ⁇ g protein for the Pertuzumab/Trastuzumab mixture (840 mg dose group). Modification in the injection volumes have been utilized in previous IV bag studies and are necessary when handling low concentration samples.
  • IEC Ion-exchange Chromatography
  • CpB carboxypeptidase B
  • the IEC assays utilized the a DIONEX® WCX weak cation exchange column equilibrated with solvent A (20 mM MES, 1 mM Na 2 EDTA pH 6.00) and solvent B (250 mM sodium chloride in solvent A) monitored at 280 nm for Pertuzumab-regular IEC and Pertuzumab-IEC-fast, whereas solvent A (10 mM sodium phosphate, pH 7.5) and solvent B (100 mM sodium chloride in Solvent A) monitored at 214 nm was used for Trastuzumab on an AGILENT 1100® HPLC.
  • peaks were eluted at a flow rate of 0.8 mL/min with an increasing gradient of 18%-100% solvent B over 35 minutes and 90 minutes for Pertuzumab-regular-IEC and Pertuzumab-IEC-fast, respectively, and 15%-100% solvent B over 55 minutes for Trastuzumab-IEC.
  • Column temperatures were maintained at either 34° C. or 42° C. and ambient for Pertuzumab-regular-IEC or Pertuzumab-fast-IEC and Trastuzumab-IEC, respectively, while the auto sampler temperature was held at 2-8° C. throughout the run.
  • Particulate counts in the diluted drug product were carried out using the HIAC-ROYCOTM Liquid Particulate Counting System model 9703. Average cumulative numbers of particles at ⁇ 10 ⁇ m and ⁇ 25 ⁇ m per milliliter were tabulated in each sample using PHARMSPEC v2.0TM. The test procedure was modified for a small-volume method, utilizing either four 1 mL readings or four 0.4 mL readings per a test session while discarding the first reading of each sample. The HIAC-ROYCOTM samples were degassed under vacuum for approximately 10-15 minutes each. The size below 10 ⁇ m was not collected for this sample set.
  • the optical density of the samples from the IV bag (1 mg/mL or 3 mg/mL) was measured in a quartz cuvette with a 1-cm path length on a HP8453 spectrophotometer. The sample readings were blanked against purified water. The absorbance measurements were recorded at 340 nm, 345 nm, 350 nm, 355 nm, and 360 nm and the turbidity was expressed as an average of these wavelengths.
  • CZE was performed using a PROTEOMELAB PA800TM capillary electrophoresis system (Beckman Coulter) with neutral-coated capillary (50 ⁇ m ⁇ 50 cm).
  • the buffer consisted of 40 mM e-amino caproic acid/acetic acid, pH 4.5, 0.2% hydroxypropyl methyl cellulose (HPMC).
  • Samples were diluted to 0.5 mg/mL in water and injected into the capillary at 1 psi for 10 seconds. Separation was performed using a voltage of 30 kV for 15 minutes, and the species were detected by UV at 214 nm.
  • each sample was derivatized with 5 carboxytetramethylrhodamine succinimidyl ester, a fluorescent dye. After removing the free dye through gel filtration (using NAP-5 columns), non-reduced samples were prepared by adding 40 mM iodoacetamide and heated at 70° C. for 5 minutes. For the analysis of the reduced samples, the derivatized samples were mixed with SDS to a final concentration of 1% (v/v) and 10 mL of a solution containing 1 M DTT, and heated at 70° C. for 20 minutes. The prepared samples were analyzed on a Beckman Coulter ProteomeLab PA800 system using a 50 mm I.D. 31.2 cm fused silica capillary maintained at 20° C.
  • Samples were introduced into the capillary by electrokinetic injection at 10 kV for 40 seconds. The separation was conducted at a constant voltage of 15 kV in the reversed polarity (negative to positive) mode using CE-SDS running buffer as the sieving medium. An argon ion laser operating at 488 nm was used for fluorescence excitation with the resulting emission signal monitored at 560 nm.
  • the distribution of charge variants of the Pertuzumab/Trastuzumab mixture, Pertuzumab alone, and Trastuzumab alone was assessed by iCIEF using an iCE280TM analyzer (Convergent Bioscience) with a fluorocarbon coated capillary cartridge (100 ⁇ m ⁇ 5 cm).
  • the ampholyte solution consisted of a mixture of 0.35% methyl cellulose (MC), 0.47% Pharmalyte 3-10 carrier ampholytes, 2.66% Pharmalyte 8-10.5 carrier ampholytes, and 0.20% pI markers 7.05 and 9.77 in purified water.
  • the anolyte was 80 mM phosphoric acid, and the catholyte was 100 mM sodium hydroxide, both in 0.10% methylcellulose.
  • Samples were diluted in purified water and CpB was added to each diluted sample at an enzyme to substrate ratio of 1:100 followed by incubation at 37° C. for 20 minutes.
  • the CpB treated samples were mixed with the ampholyte solution and then focused by introducing a potential of 1500 V for one minute, followed by a potential of 3000 V for 10 minutes.
  • An image of the focused Pertuzumab charge variants was obtained by passing 280 nm ultraviolet light through the capillary and into the lens of a charge coupled device digital camera. This image was then analyzed to determine the distribution of the various charge variants.
  • This test procedure is based on the ability of Pertuzumab to inhibit the proliferation of MDA MB 175 VII human breast carcinoma cells. Briefly, cells were seeded in 96-well tissue culture microtiter plates and incubated overnight at 37° C. under 5% CO 2 to allow cell attachment. The following day, the culture medium was removed and serial dilutions of each standard, controls, and sample(s) were added to the plates. The plates were then incubated for fours days at 37° C. under 5% CO 2 and the relative number of viable cells was quantified indirectly using a redox dye, ALAMARBLUE® according to the manufacturer's protocol.
  • a redox dye ALAMARBLUE®
  • the Pertuzumab and Trastuzumab alone IV infusion bags are considered controls that were also prepared to assess the ability of the assay to pick up the appropriate product attributes.
  • the Pertuzumab/Trastuzumab mixture, Pertuzumab alone, and Trastuzumab alone samples appeared as a clear and colorless liquid with no visible particles as observed by CAC.
  • the concentration and turbidity measurements showed no measurable changes in any of the three sample types after 24 hours at 30° C.
  • Particulate analysis by HIAC Royco detected no more than 6 particles greater than or equal to 10 am size and no particles greater than 25 ⁇ M size for Pertuzumab/Trastuzumab mixture, Pertuzumab alone, or Trastuzumab alone samples post storage. These results are comparable to the 0.9% saline only solution.
  • the lack of visible precipitation or particulates indicates that the admixture and the controls are sufficiently stable upon dilution in the 0.9% saline IV infusion bags.
  • the Pertuzumab/Trastuzumab mixture diluted in saline were run on SEC, both Pertuzumab and Trastuzumab specific methods, and showed comparable peak profiles between T0 and T24 ( FIGS. 15 and 16 ). No increases were observed in the high molecular weight species (HMWS) and low molecular weight species (LMWS). Similarly, no changes were observed in the main peak in any sample.
  • each molecule typically contain three distinct areas that are eluted based on relative charge, with the early eluting acidic variants, followed by the main peak, and lastly the late eluting basic variants.
  • the profile exhibiting the acidic variants, main peak, and the basic variants was observed and deemed comparable between the starting material and post storage at 30° C.
  • the SEC assay separates based on the hydrodynamic size of the molecule and show only one main peak due to the size similarity between Pertuzumab and Trastuzumab.
  • the charged regions of each molecule appear to overlap with each other in the Pertuzumab/Trastuzumab mixture.
  • the Pertuzumab basic variants expected to elute at approximately 32 minutes and at 35 minutes appear to overlap with the main peak of Trastuzumab ( FIGS. 17 and 18 ).
  • the acidic variants of Trastuzumab expected to elute before the Trastuzumab main peak co-elute with the Pertuzumab basic variants and main peak.
  • the Pertuzumab/Trastuzumab mixture exhibited comparable chromatographic peak profiles before and after storage in IV saline bags for 24 hours at 30° C.
  • the Pertuzumab/Trastuzumab mixture, Pertuzumab alone, and Trastuzumab alone samples were also assayed on CE-SDS LIF under non-reduced conditions after storage for 24 hours at 30° C.
  • the Pertuzumab/Trastuzumab mixture showed consistent peak profiles with no observable changes after storage compared to the starting material ( FIGS. 19 and 20 ). A very slight baseline level variation attributed to noise is also observed and does not impact peak area. Similar to SEC, the non-reduced Pertuzumab/Trastuzumab mixture showed only one superimposed monomer constituting both the Pertuzumab and Trastuzumab main species.
  • the Pertuzumab and Trastuzumab alone samples showed no changes at T0 compared to T24.
  • individual molecular attributes e.g. fragment peak level and species, between Pertuzumab/Trastuzumab mixture, Pertuzumab alone, and Trastuzumab alone was observed as expected.
  • the charge separation assays CZE and iCIEF show comparable peak profiles for the Pertuzumab/Trastuzumab mixture after storage at 30° C. ( FIGS. 21 and 22 ).
  • the Pertuzumab and Trastuzumab alone when compared to their respective T0 also showed consistent peak profiles with no changes after storage. Furthermore, the presence of various minor species was also observed, although no new peaks were detected upon dilution in the IV bag saline solution. As seen in the charge based IEC assay, two main peaks flanked by smaller overlapping peaks can be detected and was attributed to the difference in the molecular pI.
  • the potency results based on comparison of the dose response curve showed no impact on the potency of the Pertuzumab/Trastuzumab mixture stored at 30° C. for 24 hours compared to its corresponding T0 dose response curve ( FIG. 23 ).
  • the Trastuzumab alone showed little activity in the Pertuzumab potency assay.
  • the Pertuzumab/Trastuzumab mixture dose response curve compared to the dose response curve of Pertuzumab or Trastuzumab alone showed that lower doses of the Pertuzumab/Trastuzumab mixture were needed to inhibit the growth of cells as compared to Pertuzumab alone, suggesting there may be an additive or synergistic effect on the inhibition of cell proliferation for the mixture.
  • Dose II 1560 mg total Pertuzumab/Trastuzumab Mixture (840 mg Pertuzumab and 720 mg Trastuzumab)
  • the Pertuzumab and Trastuzumab alone samples also exhibited no significant particle differences before and after storage in PO or PVC IV infusion bags.
  • the UV-spec scan showed no changes beyond normal assay variability in protein concentration, indicating the absence of protein adsorption or precipitation in the IV infusion bags between T0 and T24 hours at 5° C. or 30° C. storage.
  • the Pertuzumab/Trastuzumab mixture, Pertuzumab alone, and Trastuzumab alone samples were analyzed using Pertuzumab or Trastuzumab specific SEC and IEC methods to assess their physical and chemical stability, respectively, as previously described.
  • Pertuzumab/Trastuzumab mixture no changes in SEC were observed in the chromatographic profiles between the T0 and the T24 hour samples at 5° C. or 30° C. in either PO or PVC IV infusion bags ( FIGS. 24 and 25 ), similar to the 840 mg mixture dose I results.
  • HMWS high molecular weight species
  • LMWS low molecular weight species
  • Arm A will consist of two cohorts as follows:
  • Initial infusions of Pertuzumab will be administered over 90 ( ⁇ 10) minutes and patients observed for at least 30 minutes from the end of infusion for infusion-related symptoms such as fever, chills etc. Interruption or slowing of the infusion may reduce such symptoms. If the infusion is well tolerated, subsequent infusions may be administered over 30 ( ⁇ 10) minutes with patients observed for a further 30 minutes.
  • Day 1 of the first treatment cycle as a loading dose of 8 mg/kg, followed by 6 mg/kg on Day 1 of each subsequent 3 weekly cycle; to be administered in line with product labeling.
  • Day 1 and Day 8 of the first treatment cycle at a dose of 25 mg/m 2 followed by 30-35 mg/m 2 on Day 1 and Day 8 of each subsequent 3 weekly cycle; to be administered in line with product labeling.
  • the second 95 patients will receive Pertuzumab and Trastuzumab administered together in a single infusion bag from Cycle 2 onwards, followed by vinorelbine.
  • Pertuzumab and Trastuzumab will be administered in separate infusion bags as described for Cohort 1.
  • Vinorelbine will be administered after Pertuzumab and Trastuzumab as described for Cohort 1.
  • Pertuzumab 420 mg and Trastuzumab 6 mg/kg will be given together in a single infusion bag.
  • the first combined infusion of Pertuzumab and Trastuzumab should be administered over 90 ( ⁇ 10) minutes with cardiac monitoring and close observation for infusion-associated reactions during the procedure, followed by a 60 minute observation period. If this first combined infusion is well tolerated, subsequent combined infusions can be administered over 60 ( ⁇ 10) minutes followed by a 30 minute observation period with cardiac monitoring.
  • Vinorelbine will be administered after Pertuzumab and Trastuzumab as described for Cohort 1.
  • a total of 95 patients will be randomized to arm B.
  • Day 1 of the first treatment cycle as a loading dose of 8 mg/kg, followed by 6 mg/kg on Day 1 of each subsequent 3 weekly cycle; to be administered in line with product labeling.
  • Day 1 and Day 8 of the first treatment cycle at a dose of 25 mg/m 2 followed by 30-35 mg/m 2 on Day 1 and Day 8 of each subsequent 3 weekly cycle; to be administered in line with product labeling.
  • This example is a randomized, two-arm, open-label, multicenter phase II study demonstrating the efficacy and safety of Pertuzumab given in combination with Trastuzumab plus an aromatase inhibitor in first line patients with HER2-positive and hormone receptor-positive advanced (metastatic or locally advanced) breast cancer.
  • the study design is shown in FIG. 29 .
  • PFS progression-free survival
  • AI aromatase inhibitor
  • patients may also receive induction chemotherapy (a taxane, either Docetaxel or paclitaxel), in combination with the assigned monoclonal antibody treatment arm up to the first 18 weeks of the treatment period.
  • induction chemotherapy a taxane, either Docetaxel or paclitaxel
  • treatment with the AI will start after the chemotherapy induction phase.
  • HER2-positive and hormone receptor-positive (estrogen receptor (ER)-positive and/or progesterone receptor (PgR)-positive) advanced breast cancer who have not previously received systemic nonhormonal anticancer therapy in the metastatic setting.
  • ER estrogen receptor
  • PgR progesterone receptor
  • HER2-positive defined as either IHC 3+ or ISH positive
  • ISH positivity is defined as a ratio of 2.0 or greater for the number of HER2 gene copies to the number of signals for CEP17, or for single probe tests, a HER2 gene count greater than 4).
  • Hormone receptor-positive defined as ER-positive and/or PgR-positive assessed locally as defined by institutional criteria. 6. At least one measurable lesion and/or non-measurable disease evaluable according to Response Evaluation Criteria In Solid Tumors (RECIST) version 1.1. 7. ECOG performance status 0 or 1. 8. Left ventricular ejection fraction (LVEF) of at least 50%. 9. Life expectancy of at least 12 weeks.
  • Hemoglobin ⁇ 9 g/dL Hemoglobin ⁇ 9 g/dL.
  • Serum alkaline phosphatase may be >2.5 ⁇ ULN only if bone metastases are present and AST (SGOT) and ALT (SGPT) ⁇ 1.5 ⁇ ULN.
  • Uncontrolled hypertension (systolic >150 mm Hg and/or diastolic >100 mm Hg) or clinically significant (i.e. active) cardiovascular disease: cerebrovascular accident (CVA)/stroke or myocardial infarction within 6 months prior to first study medication, unstable angina, congestive heart failure (CHF) of New York Heart Association (NYHA) grade II or higher, or serious cardiac arrhythmia requiring medication.
  • CVA cerebrovascular accident
  • CHF congestive heart failure
  • NYHA New York Heart Association
  • Current known infection with HIV, HBV, or HCV 13.
  • Major surgical procedure or significant traumatic injury within 28 days prior to randomization or anticipation of needed for major surgery during the course of study treatment. 15.
  • Initial infusions of Pertuzumab will be administered over 90 ( ⁇ 10) minutes and patients observed for at least 30 minutes from the end of infusion for infusion-related symptoms such as fever, chills etc. Interruption or slowing of the infusion may reduce such symptoms. If the infusion is well tolerated, subsequent infusions may be administered over 30 ( ⁇ 10) minutes with patients observed for a further 30 minutes.
  • trastuzumab IV infusion administered after Pertuzumab
  • Day 1 of the first treatment cycle as a loading dose of 8 mg/kg, followed by 6 mg/kg on Day 1 of each subsequent 3 weekly cycle; to be administered in line with product labeling.
  • Taxane Docetaxel every 3 weeks or paclitaxel weekly
  • Chemotherapy will be administered after the monoclonal antibody (Pertuzumab and/or Trastuzumab) infusions.
  • Day 1 of the first treatment cycle as a loading dose of 8 mg/kg, followed by 6 mg/kg on Day 1 of each subsequent 3 weekly cycle; to be administered in line with product labeling.
  • PFS defined as the time from randomization until the first radiographically documented progression of disease or death from any cause, whichever occurs first.
  • OS overall survival
  • OBF O'Brien-Fleming
  • Kaplan-Meier estimates of OS rates show survival benefit with P+T+D at 1, 2, and 3 yrs.
  • OS can be included on the package insert with prescribing information regarding Pertuzumab in an article of manufacture as in Example 4 above, for example.
  • Pertuzumab a humanized monoclonal antibody, inhibits signaling downstream of HER2 by binding to the dimerization domain of the receptor and preventing heterodimerization with other HER family members.
  • the epitope recognized by P is distinct from that bound by Trastuzumab (H) and so their complementary mechanisms of action result in a more comprehensive HER2 blockade.
  • Data from the phase III trial CLEOPATRA showed significantly improved PFS in patients (pts) receiving P+H+docetaxel compared with H+docetaxel+placebo as first-line treatment for HER2-positive metastatic breast cancer (BC).
  • pts must have an LVEF of ⁇ 50%, an ECOG PS of 0, 1, or 2, a disease-free interval of ⁇ 6 months, and must not have received prior anti-HER2 agents for the treatment of metastatic BC.
  • Prior H and/or lapatinib in the (neo)adjuvant setting is permitted, providing there was no disease progression during treatment.
  • Pts must not have experienced other malignancies within the last 5 yrs other than carcinoma in situ of the cervix or basal cell carcinoma. There must be no clinical or radiographic evidence of CNS metastases or clinically significant cardiovascular disease.
  • the primary endpoints of the PERUSE study are safety and tolerability. Secondary endpoints include PFS, OS, ORR, CBR, duration of response, time to response and QoL.
  • the final analysis will be performed when 1500 pts have been followed up for at least 12 months after the last pt receives last study treatment unless they have been lost to follow-up, withdrawn consent, or died, or if the study is prematurely terminated by the sponsor.
  • Safety analyses are planned after enrollment of ⁇ 350, 700, and 1000 pts. Additionally, a data and safety monitoring board will review safety data after ⁇ 50 pts have been enrolled and then every 6 months.
  • Epithelial ovarian cancer along with primary peritoneal, and fallopian tube carcinoma, is the fifth leading cause of cancer-related deaths in women in Europe (Bray et al. Int. J. Cancer 113:977-90 (2005)). Ovarian cancer is often not diagnosed until it has progressed to an advanced stage, at which point the standard treatment is surgical resection followed by chemotherapy. Although the addition of taxanes to platinum-based chemotherapy has resulted in approximately 80% of patients achieving complete response (CR), the disease recurs in most patients, and more than 50% of patients diagnosed with epithelial ovarian cancer eventually die from their disease (Du Bois et al. Cancer 115:1234-1244 (2009)). Following failure of platinum-based chemotherapy, there are few therapeutic options.
  • platinum-sensitive disease disease recurrence occurs more than 6 months after last cycle of platinum-based chemotherapy
  • PFS progression-free survival
  • PFD progression-free survival
  • patients with platinum-resistant are often treated with single-agent chemotherapy such as topotecan, pegylated liposomal doxorubicin (PLD), paclitaxel and gemcitabine.
  • EGFR and HER2 have been studied the most extensively, and multiple agents targeting the receptor or associated intracellular tyrosine kinases have been tested.
  • HER3 is the most potent activator of the PI3 kinase/AKT pathway (Olayioye et al. EMBO J. 19:3159-67 (2000)).
  • HER2-amplified breast cancer cell lines show that HER3 but not EGFR was critical for HER2 signaling, and that HER3 inhibited growth in three-dimensional culture and induced rapid tumor regression of in vivo xenografts (Lee-Hoeflich et al. Cancer Res 68:5878-87 (2008)).
  • HER3 expression has been implicated as a possible risk factor in ovarian cancer (Tanner et al. J Clin Oncol 24:4317-23 (2006)).
  • AEs adverse events
  • those increased (by at least 6 patients) in the Pertuzumab-treated cohort included fatigue, nausea, diarrhea, back pain, dyspepsia, stomatitis, headache, epistaxis, rhinorrhea, rash, and Grade 3-4 neutropenia.
  • HER3 mRNA expression was correlated with PFS and OS for patients in the gemcitabine+placebo arm.
  • median OS for patients with low HER3 mRNA expression was 8.4 months, compared with 18.2 months for patients with high HER3 mRNA expression.
  • Part 1 will be performed to assess safety and tolerability of Pertuzumab in a new combination with two chemotherapeutic agents (topotecan or paclitaxel).
  • Part 2 of the trial is a randomized, double-blind, placebo controlled, two-arm, multicenter, prospective trial of Pertuzumab in combination with chemotherapy (topotecan, paclitaxel, or gemcitabine).
  • Patients will receive trial medication until disease progression as per the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1, disease progression according to the Gynecologic Cancer Intergroup (GCIG) criteria of CA-125 assessable disease, unacceptable toxicity, withdrawal of consent, or death.
  • PFS will be assessed in Part 1 of the trial, but due to small number of patients and PFS events per cohort, results will be descriptive only.
  • the trial design for Part 1 of the study is provided in FIG. 30 .
  • Arm A Pertuzumab in combination with chemotherapy (topotecan, paclitaxel, or gemcitabine), or
  • Arm B Pertuzumab-placebo plus chemotherapy (topotecan, paclitaxel, or gemcitabine).
  • the allocation of study medication will be double-blind with respect to whether the patient receives Pertuzumab or Pertuzumab-placebo.
  • the chemotherapy agent allocated will be at the discretion of the investigator.
  • the trial design for Part 2 of the study is provided in FIG. 31 .
  • the primary objective for Part 1 of this study is to determine the safety and tolerability of Pertuzumab in combination with either topotecan or paclitaxel.
  • the primary objective for Part 2 of this study is to determine if Pertuzumab plus chemotherapy is superior to placebo plus chemotherapy as measured by PFS.
  • the secondary objective for Part 1 of this study is to evaluate descriptively the PFS of Pertuzumab in combination with either topotecan or paclitaxel.
  • the secondary objectives for Part 2 of this study are to determine if Pertuzumab plus chemotherapy is superior to placebo plus chemotherapy with respect to:
  • epithelial ovarian cancer that is platinum-resistant or refractory (defined as progression within 6 months from completion of a minimum of 4 platinum therapy cycles or progression during platinum therapy).
  • At least one measurable lesion and/or non-measurable disease according to RECIST version 1.1, or cancer antigen-125 (CA-125) assessable disease according to Gynecologic Center Intergroup (GCIG) criteria.
  • GCIG Gynecologic Center Intergroup
  • Pertuzumab and Pertuzumab-placebo will be administered as an intravenous infusion on Day 1 of the first treatment cycle as a loading dose of 840, followed by 420 mg on Day 1 of each subsequent 3-weekly cycle.
  • the initial infusion of Pertuzumab/Pertuzumab-placebo will be administered over 60 minutes followed by a 60-minute observational period in a seated position if the infusion is well tolerated, subsequent infusions may be given over 30 minutes, followed by a 30-minute observational period, after which the chemotherapy agent will be administered.
  • Pre-medication should be implemented according to local practices and the chosen chemotherapy.
  • Topotecan should be administered 1.25 mg/m 2 as a 30-minute intravenous infusion daily on Days 1-5 every 3 weeks, as per the directions in the summary of product characteristics.
  • Paclitaxel should be administered 80 mg/m2 as a 1-hour i.v. infusion on Days 1, 8, 15 and 22. Pharmacists should follow the summary of product characteristics for information regarding the preparation and administration of the 80 mg/m2 dose.
  • Gemcitabine (Part 2 of the study only) should be administered 1000 mg/m2 as a 30-minute intravenous infusion on Days 1 and 8 every 3 weeks as per the directions described in the summary of product characteristics.
  • HER3 mRNA level including mRNA and protein levels of other HER family receptors e.g. HER2, before they provide consent to participate in the trial. Only patients who have tumors expressing low levels of HER3 mRNA will be eligible to participate in the trial.
  • HER3 mRNA levels During the initial screening for HER3 mRNA levels, other receptors of the HER family (e.g. EGFR, HER2, or HER4) will be assessed at the mRNA level and/or protein level in parallel to the HER3 assessment, in order to obtain a more complete picture of the status of HER family receptors by mRNA level.
  • EGFR EGFR
  • HER2 HER2
  • the cut-off defined for study eligibility is defined as a concentration ratio of ⁇ 2.81 as assessed by qRT-PCR on a COBAS z480® instrument using the “COBAS® HER2 & HER3 (qRT-PCR) mRNA expression assay” provided by Roche Molecular Diagnostics.
  • the rationale for cut off definition is based on a cut off modeling in previous studies as well as on a transformation function that had to be introduced since the assay was switched to a new instrument; the COBAS z480®. It is anticipated that 40-50% of screened patients will have HER3 mRNA levels below the cutoff of 2.81 and that 30% of patients expressing low levels of HER3 mRNA will be ineligible for enrollment owing to other inclusion/exclusion criteria.
  • Pertuzumab in combination with topotecan or paclitaxel will be safe and effective in patients with epithelial ovarian, primary peritoneal, or fallopian tube cancer.
  • Pertuzumab plus chemotherapy topotecan, paclitaxel, or gemcitabine
  • placebo plus chemotherapy in patients with epithelial ovarian, primary peritoneal, or fallopian tube cancer where efficacy is measured by PFS.

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