WO2016086021A1 - Novel pd-l1 binding polypeptides for imaging - Google Patents

Novel pd-l1 binding polypeptides for imaging Download PDF

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Publication number
WO2016086021A1
WO2016086021A1 PCT/US2015/062485 US2015062485W WO2016086021A1 WO 2016086021 A1 WO2016086021 A1 WO 2016086021A1 US 2015062485 W US2015062485 W US 2015062485W WO 2016086021 A1 WO2016086021 A1 WO 2016086021A1
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Prior art keywords
imaging agent
seq
polypeptide
adnectin
nos
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English (en)
French (fr)
Inventor
Paul E. Morin
David Donnelly
Dasa Lipovsek
Jochem Gokemeijer
Maria N. JURE-KUNKEL
David Fabrizio
Martin C. Wright
Douglas DISCHINO
Samuel J. BONACORSI
Ralph Adam SMITH
Virginie LAFONT
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Bristol Myers Squibb Co
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Bristol Myers Squibb Co
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Priority to EP15805710.9A priority Critical patent/EP3224277B1/en
Priority to EA201791112A priority patent/EA037590B1/ru
Priority to AU2015353573A priority patent/AU2015353573B2/en
Priority to KR1020177017017A priority patent/KR102632418B1/ko
Priority to BR112017010137-8A priority patent/BR112017010137A2/en
Priority to MX2017006530A priority patent/MX383917B/es
Priority to EP20150212.7A priority patent/EP3702367B1/en
Priority to CN202210247894.9A priority patent/CN114591420A/zh
Priority to CN201580074360.9A priority patent/CN107406494B/zh
Priority to US15/529,260 priority patent/US10406251B2/en
Priority to ES15805710T priority patent/ES2822990T3/es
Priority to SG11201703760WA priority patent/SG11201703760WA/en
Application filed by Bristol Myers Squibb Co filed Critical Bristol Myers Squibb Co
Priority to CA2969067A priority patent/CA2969067A1/en
Priority to JP2017545877A priority patent/JP6622814B2/ja
Publication of WO2016086021A1 publication Critical patent/WO2016086021A1/en
Priority to IL252354A priority patent/IL252354B/en
Anticipated expiration legal-status Critical
Priority to US16/520,965 priority patent/US11173219B2/en
Priority to US17/483,393 priority patent/US12194110B2/en
Ceased 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
    • A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
    • A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
    • A61K51/04—Organic compounds
    • A61K51/08—Peptides, e.g. proteins, carriers being peptides, polyamino acids, proteins
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
    • A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
    • A61K51/04—Organic compounds
    • A61K51/08—Peptides, e.g. proteins, carriers being peptides, polyamino acids, proteins
    • A61K51/088—Peptides, e.g. proteins, carriers being peptides, polyamino acids, proteins conjugates with carriers being peptides, polyamino acids or proteins
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/78—Connective tissue peptides, e.g. collagen, elastin, laminin, fibronectin, vitronectin or cold insoluble globulin [CIG]
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/575—Immunoassay; Biospecific binding assay; Materials therefor for cancer
    • G01N33/5758—Immunoassay; Biospecific binding assay; Materials therefor for cancer involving compounds serving as markers for tumours, cancers or neoplasias, e.g. cellular determinants, receptors, heat shock/stress proteins, A-protein, oligosaccharides or metabolites
    • G01N33/5759—Immunoassay; Biospecific binding assay; Materials therefor for cancer involving compounds serving as markers for tumours, cancers or neoplasias, e.g. cellular determinants, receptors, heat shock/stress proteins, A-protein, oligosaccharides or metabolites involving compounds localised on the membrane of tumour or cancer cells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/58—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
    • G01N33/60—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances involving radioactive labelled substances
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
    • G01N33/6872—Intracellular protein regulatory factors and their receptors, e.g. including ion channels
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2319/00—Fusion polypeptide
    • C07K2319/60—Fusion polypeptide containing spectroscopic/fluorescent detection, e.g. green fluorescent protein [GFP]
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N2330/00—Production
    • C12N2330/50—Biochemical production, i.e. in a transformed host cell
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
    • G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
    • G01N2333/705—Assays involving receptors, cell surface antigens or cell surface determinants
    • G01N2333/70503—Immunoglobulin superfamily, e.g. VCAMs, PECAM, LFA-3
    • G01N2333/70532—B7 molecules, e.g. CD80, CD86
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
    • G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
    • G01N2333/78—Connective tissue peptides, e.g. collagen, elastin, laminin, fibronectin, vitronectin, cold insoluble globulin [CIG]

Definitions

  • nucleic acids encoding the polypeptides, as well as vectors and cells comprising the nucleic acids, described herein.
  • the nucleic acid comprises a nucleotide sequence selected from the group consisting of SEQ ID NOs: 16-19, 31-34, 46-49, 61-64, 76-79, 92-95, and 108-111.
  • the imaging agent comprises an anti-PD-L1 polypeptide (e.g., an anti-PD-L1 Adnectin described herein, e.g., an anti-PD-L1 Adnectin comprising the amino acid sequence set forth in SEQ ID NO: 80 or 96), a bifunctional chelator or conjugating (BFC) moiety , and a prosthetic group comprising the radionuclide 18 F.
  • an anti-PD-L1 polypeptide e.g., an anti-PD-L1 Adnectin described herein, e.g., an anti-PD-L1 Adnectin comprising the amino acid sequence set forth in SEQ ID NO: 80 or 96
  • BFC bifunctional chelator or conjugating
  • the imaging agent has the following structure:
  • Figure 8 depicts immunohistochemistry images of xenograft and human lung tumor specimens labelled with anti-PD-L1 Adnectins to demonstrate tumor expression of hPD-L1.
  • Figure 10 is a schematic of the GE TRACERlab FX2 N Synthesis module for automated synthesis of [ 18 F]-FPPEGA.
  • a "scaffold region” refers to any non-loop region of a human 10 Fn3 domain.
  • the scaffold region includes the A, B, C, D, E, F and G ⁇ -strands as well as the N-terminal region (amino acids corresponding to residues 1-7 of SEQ ID NO: 1) and the C-terminal region (amino acids corresponding to residues 93-94 of SEQ ID NO: 1 and optionally comprising the 7 amino acids constituting the natural linker between the 10 th and the 11 th repeat of the Fn3 domain in human fibronectin).
  • cross-reactivity refers to an Adnectin which binds to more than one distinct protein having identical or very similar Adnectin binding sites.
  • Half-life can be expressed using parameters such as the t 1/2 -alpha, t 1/2 -beta,
  • chelator ligand refers to a bifunctional chelator or conjugating (BFC) moiety, which are used interchangeably herein, that covalently links a radiolabeled prosthetic group to a biologically active targeting molecule (e.g., peptide or protein).
  • BFCs utilize functional groups such as carboxylic acids or activated esters for amide couplings, isothiocyanates for thiourea couplings and maleimides for thiol couplings.
  • Fn3 domains comprise, in order from N-terminus to C-terminus, a beta or beta-like strand, A; a loop, AB; a beta or beta- like strand, B; a loop, BC; a beta or beta-like strand, C; a loop, CD; a beta or beta-like strand, D; a loop, DE; a beta or beta-like strand, E; a loop, EF; a beta or beta-like strand, F; a loop, FG; and a beta or beta-like strand, G.
  • EVVAATPTSLLISW(Z) x YRITYGETGGNSPVQEFTV(Z) y ATISGLKPGVDYTITVYA(Z) z ISINYRT SEQ ID NO: 4
  • the BC loop is represented by (Z) x
  • the DE loop is represented by (Z) y
  • the FG loop is represented by (Z) z
  • Z represents any amino acid and the subscript following the Z represents an integer of the number of amino acids.
  • x, y and z may each independently be anywhere from 2-20, 2-15, 2-10, 2-8, 5-20, 5-15, 5-10, 5-8, 6-20, 6-15, 6-10, 6-8, 2-7, 5-7, or 6-7 amino acids.
  • an anti-PD-L1 Adnectin comprises the sequence set forth in SEQ ID NO: 3 or 4, wherein BC, DE and FG loops as represented by (Z) x , (Z) y , and (Z) z , respectively, comprise BC, DE, and FG loops having the amino acid sequences of SEQ ID NOs: 6, 7, and 8, respectively.
  • the anti-PD-L1 Adnectin comprises BC, DE, and FG loops as set forth in SEQ ID NOs: 36, 37, and 38, respectively.
  • an alternative N-terminal region having from 1-20, 1-15, 1-10, 1-8, 1-5, 1-4, 1-3, 1-2, or 1 amino acids in length can be added to the N-terminal region of SEQ ID NO: 1 or 2 or any adnectin set forth in Table 3.
  • Exemplary alternative N-terminal regions include (represented by the single letter amino acid code) M, MG, G,
  • the competing Adnectin is an Adnectin that binds to the same Adnectin binding site on PD-L1 as a particular anti-PD-L1 Adnectin described herein.
  • Standard mapping techniques such as protease mapping, mutational analysis, HDX-MS, x- ray crystallography and 2-dimensional nuclear magnetic resonance, can be used to determine whether an Adnectin binds to the same Adnectin binding site or epitope as a reference Adnectin (see, e.g., Epitope Mapping Protocols in Methods in Molecular Biology, Vol.66, G. E. Morris, Ed. (1996)).
  • An epitope is defined by the method used to locate it.
  • adnectins that comprise an amino acid sequence that is at least 70%, 80%, 90%, 95%, 97%, 98% or 99% identical to an anti-PD-L1 adnectin described herein or a portion thereof (e.g., the BC, DE and FG loops), bind to human PD-L1 with a KD of 10 nM, 1 nM, 0.5 nM, 0.1nM or less, as determined, e.g., by SPR (Biacore) and exhibit one or more of the following properties: 1.
  • an anti-PD-L1 adnectin comprises an amino acid sequence that is at least 70%, 80%, 90%, 95%, 97%, 98% or 99% identical to an anti-PD-L1 adnectin described herein or a portion thereof (e.g., the BC, DE and FG loops), binds to human PD-L1 with a KD of 1 nM or less and exhibits each one of properties 1-5.
  • the PK moiety is linked to the anti-PD-L1 Adnectin via a polypeptide linker.
  • polypeptide linkers include polypeptides having from 1-20, 1- 15, 1-10, 1-8, 1-5, 1-4, 1-3, or 1-2 amino acids.
  • Suitable linkers for joining the Fn3 domains are those which allow the separate domains to fold independently of each other forming a three dimensional structure that permits high affinity binding to a target molecule.
  • Specific examples of suitable linkers include glycine-serine based linkers, glycine-proline based linkers, proline-alanine based linkers as well as any other linkers described herein.
  • the linker does not contain any Asp-Lys (DK) pairs.
  • DK Asp-Lys
  • PEG polyethylene glycol molecule
  • X is 20 to 2300 and X is H or a terminal modification, e.g., a C 1-4 alkyl.
  • PEG can contain further chemical groups which are necessary for binding reactions, which result from the chemical synthesis of the molecule; or which act as a spacer for optimal distance of parts of the molecule.
  • such a PEG can consist of one or more PEG side-chains which are linked together. PEGs with more than one PEG chain are called multiarmed or branched PEGs. Branched PEGs are described in, for example, European Published Application No.473084A and U.S. Pat. No. 5,932,462.
  • a “native sequence Fc region” comprises an amino acid sequence identical to the amino acid sequence of an Fc region found in nature.
  • 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.
  • 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.
  • nucleic acid sequences that are at least 50%, such as at least 55%, at least 60%, at least 65%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, or at least 99% identical to SEQ ID NOs: 16-19, 31-34, 46-49, 61-64, 76-79, 92-95, and 108-111, and encode a protein that binds to PD-L1.
  • nucleotide substitutions are introduced so as not to alter the resulting translated amino acid sequence.
  • Expression and cloning vectors may contain a selection gene, also termed a selectable marker.
  • Typical selection genes encode proteins that (a) confer resistance to antibiotics or other toxins, e.g., ampicillin, neomycin, methotrexate, or tracycline, (b) complement auxotrophic deficiencies, or (c) supply critical nutrients not available from complex media, e.g., the gene encoding D-alanine racemase for Bacilli.
  • Lysates are cleared and re-racked into a 96-well format by transfer into a 96-well Whatman GF/D Unifilter fitted with a 96-well, 1.2 ml catch plate and filtered by positive pressure.
  • the cleared lysates are transferred to a 96-well Nickel or Cobalt-Chelating Plate that had been equilibrated with equilibration buffer (50 mM NaH 2 PO 4 , 0.5 M NaCl, 40 mM imidazole, pH 8.0) and are incubated for 5 min. Unbound material is removed by positive pressure.
  • equilibration buffer 50 mM NaH 2 PO 4 , 0.5 M NaCl, 40 mM imidazole, pH 8.0
  • compositions of the present invention for oral use include tablets containing the active ingredient(s) in a mixture with non-toxic pharmaceutically acceptable excipients.
  • excipients may be, for example, inert diluents or fillers (e.g., sucrose and sorbitol), lubricating agents, glidants, and anti-adhesives (e.g., magnesium stearate, zinc stearate, stearic acid, silicas, hydrogenated vegetable oils, or talc).
  • Compositions for oral use may also be provided as chewable tablets, or as hard gelatin capsules wherein the active ingredient is mixed with an inert solid diluent, or as soft gelatin capsules wherein the active ingredient is mixed with water or an oil medium.
  • An Anti-PD-L1 Adnectin that binds to and antagonizes PD-L1 can be identified using various in vitro assays.
  • the assays are high-throughput assays that allow for screening multiple candidate Adnectins simultaneously.
  • Exemplary assays for determining the binding affinity of an anti-PD-L1 Adnectin includes, but is not limited to, solution phase methods such as the kinetic exclusion assay (KinExA) (Blake et al., JBC 1996; 271:27677-85; Drake et al., Anal Biochem 2004; 328:35- 43), surface plasmon resonance (SPR) with the Biacore system (Uppsala, Sweden) (Welford et al., Opt. Quant.
  • KinExA kinetic exclusion assay
  • SPR surface plasmon resonance
  • administration occurs in an amount of radiolabeled
  • the method produces a 18 F-pyridine prosthetic group with the following structure b
  • the 18 F-radiolabeled probe or agent has the following structure a,
  • PD-L1 is the primary PD-1 ligand up-regulated within solid tumors, where it can inhibit cytokine production and the cytolytic activity of PD-1-positive, tumor-infiltrating CD4 + and CD8 + T-cells, respectively (Dong et al, 2002; Hino et al, 2010; Taube et al, 2012). These properties make PD-L1 a promising target for cancer immunotherapy.
  • anti-PD-L1 Adnectin described herein may be used for the preparation of a medicament for inhibiting signaling from the PD-1/PD-L1 pathway so as to thereby potentiate an endogenous immune response in a subject afflicted with cancer.
  • This disclosure also provides the use of any anti-PD-L1 Adnectin described herein for the preparation of a medicament for immunotherapy of a subject afflicted with cancer.
  • the disclosure provides medical uses of any anti-PD-L1 Adnectin described herein corresponding to all the embodiments of the methods of treatment employing a PD-L1 Adnectin described herein.
  • kits may further comprise vials, solutions and optionally additional reagents necessary for the manufacture of PD-L1 Adnectin-PEG4-DBCO- 18 F.
  • kits may comprise the reagents necessary for forming a 64 Cu labelled anti-PD-L1 Adnectin, such as the reagents described herein. Incorporation by Reference
  • the high-affinity, anti-PD-L1 Adnectin, ADX_5322_A02 (“A02”) was obtained by affinity-maturing the ATI-964 Adnectin.
  • the gene encoding ATI-964 was re- diversified by introducing a small fraction of non-wild-type nucleotides at each nucleotide position that encoded a residue in loop BC, DE, or FG.
  • the resulting library of Adnectin sequences related to ATI-964 was then subjected to in vitro selection by PROfusion (mRNA display) for binding to human PD-L1 under high-stringency conditions.
  • Anti-PD-L1 antibodies were also tested in a mixed lymphocyte reaction (MLR): ATI-964, ATI-965, and ATI-968 were active in an MLR, whereas ATI-966 and ATI-967 were not active in an MLR.
  • MLR mixed lymphocyte reaction
  • the crude reaction was reconstituted in 50 mL of ethyl acetate, washed with 2 x 50 mL of a aqueous brine solution, and the organic layer was dried over magnesium sulfate, filtered, and concentrated in vacuo.
  • the crude reaction was purified using normal-phase chromatography to give 3-(2-(2-(2-(2-azidoethoxy)ethoxy)ethoxy)ethoxy)-N,N-dimethylpyridin-2-amine (140 mg, 0.413 mmol, 81 % yield) as a colorless oil.
  • This Example describes the linking of the E01 anti-PD-L1 Adnectin to PEG4-DBCO.
  • This Example describes the linking of the E01 and A02 anti-PD-L1 Adnectins to NODAGA.
  • maleimide chemistry is used to link the Adnectins to NODAGA, both Adnectins used a proline followed by a cysteine at their C-terminus (as described for E01 above).
  • the amino acid sequences of the modified E01 and A02 Adnectins are provided in SEQ ID NOs: 104 and 88, respectively.
  • the cysteine will be used for linking the Adnectins to NODAGA.
  • a 10-minute transmission image was first acquired using a 57 Co point source for the purpose of attenuation correction of the final PET images.
  • radiotracer solutions were administered via the previously installed tail vein catheters and a 2 hour emission image was acquired.
  • Injected radiotracer solutions consisted of either approximately 200 ⁇ Ci 64 Cu-A02 (with a NODAGA chelator) or 200 ⁇ Ci 64 Cu-A02 supplemented with 3 mg/kg final concentration of cold, unlabeled A02 Adnectin (based on individual animal weight). All injections were formulated in 200 ⁇ L saline prior to injection. Exact injected doses were calculated by taking direct measurements of the formulated dose and subtracting the radioactivity remaining in the syringe and the tail vein catheter.
  • a stock solution of 0.25 nM 18 F-A02 Adnectin was produced by diluting 10.6 ⁇ l of the original stock radioligand solution (7064 nM at the time of experiment) with 300 ml of PBS + 0.5% BSA. From this stock solution, 40 ml was added to each incubation chamber. One of these chambers contained only the radioligand buffer solution, which is referred to as the total binding section. Other incubation chambers received 40 ml of this stock solution along with the relevant concentration of blocking compound (unlabeled A02 Adnectin at 0.025 nM, 0.25 nM, 2.5 nM, or 25 nM or unlabeled non-PD-L1 binding Adnectin at 25 nM).

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PCT/US2015/062485 2014-11-25 2015-11-24 Novel pd-l1 binding polypeptides for imaging Ceased WO2016086021A1 (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
ES15805710T ES2822990T3 (es) 2014-11-25 2015-11-24 Novedosos polipéptidos de unión a PD-L1 para obtención de imágenes
AU2015353573A AU2015353573B2 (en) 2014-11-25 2015-11-24 Novel PD-L1 binding polypeptides for imaging
KR1020177017017A KR102632418B1 (ko) 2014-11-25 2015-11-24 영상화를 위한 신규 pd-l1 결합 폴리펩티드
BR112017010137-8A BR112017010137A2 (en) 2014-11-25 2015-11-24 pd-l1 fixing polypeptides for imaging
MX2017006530A MX383917B (es) 2014-11-25 2015-11-24 Nuevos péptidos que se unen al ligando-1 de muerte programada (pd-l1) para formación de imagen.
EP20150212.7A EP3702367B1 (en) 2014-11-25 2015-11-24 Novel pd-l1 binding polypeptides for imaging
CN202210247894.9A CN114591420A (zh) 2014-11-25 2015-11-24 用于成像的新型pd-l1结合多肽
CN201580074360.9A CN107406494B (zh) 2014-11-25 2015-11-24 用于成像的新型pd-l1结合多肽
US15/529,260 US10406251B2 (en) 2014-11-25 2015-11-24 PD-L1 binding polypeptides for imaging
EP15805710.9A EP3224277B1 (en) 2014-11-25 2015-11-24 Novel pd-l1 binding polypeptides for imaging
EA201791112A EA037590B1 (ru) 2014-11-25 2015-11-24 Связывающиеся с pd-l1 полипептиды на основе 10fn3 домена для визуализации
SG11201703760WA SG11201703760WA (en) 2014-11-25 2015-11-24 Novel pd-l1 binding polypeptides for imaging
CA2969067A CA2969067A1 (en) 2014-11-25 2015-11-24 Novel pd-l1 binding polypeptides for imaging
JP2017545877A JP6622814B2 (ja) 2014-11-25 2015-11-24 イメージングのための新規ｐｄ−ｌ１結合ポリペプチド
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US16/520,965 US11173219B2 (en) 2014-11-25 2019-07-24 PD-L1 binding polypeptides for imaging
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