Classifications

• • 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
  • C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
  • C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
  • C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
  • C07K14/4747—Apoptosis related proteins
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K38/00—Medicinal preparations containing peptides
  • A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
  • A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
  • A61K38/177—Receptors; Cell surface antigens; Cell surface determinants
  • A61K38/179—Receptors; Cell surface antigens; Cell surface determinants for growth factors; for growth regulators
• • 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
  • A61K39/0005—Vertebrate antigens
  • A61K39/0011—Cancer antigens
  • A61K39/001102—Receptors, cell surface antigens or cell surface determinants
  • A61K39/001103—Receptors for growth factors
  • A61K39/001106—Her-2/neu/ErbB2, Her-3/ErbB3 or Her 4/ErbB4
• • 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
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P13/00—Drugs for disorders of the urinary system
  • A61P13/08—Drugs for disorders of the urinary system of the prostate
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P15/00—Drugs for genital or sexual disorders; Contraceptives
• • 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
  • A61K2039/555—Medicinal preparations containing antigens or antibodies characterised by a specific combination antigen/adjuvant
  • A61K2039/55505—Inorganic adjuvants
• • 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
  • A61K2039/555—Medicinal preparations containing antigens or antibodies characterised by a specific combination antigen/adjuvant
  • A61K2039/55511—Organic adjuvants
  • A61K2039/55566—Emulsions, e.g. Freund's adjuvant, MF59
• • 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
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2319/00—Fusion polypeptide

Definitions

• the present invention relates to compositions and methods for treating neoplasms in mammals, particularly humans. More particularly, the present invention provides for methods for preventing, treating or delaying neoplasm in a mammal using an ErbB-3 protein, a nucleic acid encoding an ErbB-3 protein or a functional fragment thereof.
• the present invention also provides for isolated nucleic acids encoding an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, substantially purified extracellular domain of the ErbB-3 protein, or a functional fragment thereof and antibodies that bind to an epitope in an extracellular domain of the ErbB-3 protein, or a functional fragment thereof.
• the present invention further provides for pharmaceutical compositions and/or vaccines comprising the extracellular domain of the ErbB-3 protein, or a functional fragment thereof, or nucleic acids encoding and antibodies binding to such extracellular domain or functional fragments thereof.
• Cancer is a major lethal disease for humans and is caused by physiologically-uncontrolled cell proliferation which affects normal physiological conditions of human body resulting in serious pathological reactions often leading to death. Although tremendous efforts on cancer studies and treatments have been made, presently, cancer is still the major cause of death to humans. There are multiple approaches to treat cancer patients including surgery, radiation therapy and chemotherapy. As the first two methods are not able to completely eliminate cancer cells in patients, the latter approach is commonly used to control cancer cell growth with or without other treatments. Anti- cancer compounds used in patients are often targeting prevention of cancer cell proliferation or killing dividing cells.
• ErbBs are class one receptor protein tyrosine kinases. ErbB-mediated cell signaling plays a critical role in embryo development and adult organ function. On a cellular level, ErbB receptors have been shown to mediate signals for cell proliferation, differentiation, migration, and cell structure reorganization. There are four structurally similar ErbB members, ErbB-1, ErbB-2. ErbB-3 and ErbB-4.
• the epidermal growth factor (EGF) is one of several ligands that bind ErbB-1. ErbB-3 or ErbB-4 also bind several ligands, including neuregulin-1 (NRG-1). To date, no ligand for ErbB-2 has been identified. However, ErbB-2 serves as a heterodimer partner for ErbB-3, ErbB-4 or ErbB-1 and is critically involved in NRG-1 -activated cell signaling.
• ErbB-2 In addition to its role in development, the human ErbB-2 gene is frequently amplified and its encoded protein is over-expressed in a variety of human carcinomas.
• ErbB-2 Early research on ErbB-2 discovered that an oncogenic point mutation resulted in the formation of ErbB-2 homodimers that in turn caused significant phosphorylation of the tyrosine residues on the intracellular domain. While no corresponding point mutation has been found in ErbB-2 over expressing human carcinomas, the upregulation of ErbB-2 results in the formation of homodimers that in turn increases the tyrosine phosphorylation of its intracellular domain. This process is hypothesized to be the start of a signal cascade that triggers cell transformation and/or growth, and thus initiate tumorigenesis.
• ErbB-2 acts as a heterodimer partner for the ligand-binding ErbB-3 or ErbB-4 receptors.
• the ligand, NRG-1 has been identified to have two independent receptor binding sites: one that has a high affinity for ErbB-3 or ErbB-4, and the other that has a low but non-specific affinity for all ErbB members.
• the exposure of NRG-1 to cells expressing ErbB-3/4 and ErbB-2 would result in heterodimers of ErbB-2 and ErbB-3/4.
• ErbB-3 is unique because: i) ErbB-2 preferentially forms heterodimers with ErbB-3; ii) cotransfection of NIH3T3 cells with ErbB-2 and ErbB-3 results in much higher levels of cell transformation than that of transfection with ErbB-2 alone; iii) in ErbB-2 over-expression-associated breast cancer cells, ErbB-3 is also highly expressed; and iv) ErbB-3 is also over expressed in ErbB-2-over expressing tumour cells from ErbB-2 transgenic mice.
• WO 00/78347 discloses methods for arresting or inhibiting cell growth, particularly cancer cell growth, comprising preventing or reducing ErbB- 2/ErbB-3 heterodimer formation, or interfering with ErbB-2/ErbB-3 heterodimer conformation in a cell and agents which prevent or reduce ErbB-2/ErbB-3 heterodimer formation or interfere with ErbB-2/ErbB-3 heterodimer conformation in a cell thereby arresting or inhibiting the growth of the cell.
• 5,578,482 relates to erbB-2 ligands and functional derivatives thereof which are capable of binding to the erbB-2 oncogene product.
• U.S. Patent No. 5,820,859 relates to a method of targeting a therapeutic agent to cells expressing the erb B-3 receptor.
• U.S. Patent No. 5,968,511 relates to ErbB3 antibodies.
• the present invention is directed to a method for preventing, treating or delaying neoplasm in a mammal, which method comprises administering to a mammal, to which such prevention, treatment or delay is needed or desirable, an effective amount of an ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, whereby an immune response is generated against said neoplasm and said neoplasm is prevented, treated or delayed.
• the present invention is directed to an isolated nucleic acid fragment, which isolated nucleic acid fragment comprises a sequence of nucleotides encoding an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 ( Figure 5) or SEQ ID NO:3 ( Figure 11) or an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14 or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the present invention is directed to a substantially purified protein or peptide, which comprises an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the present invention is directed to a conjugate, which conjugate comprises: a) a protein or peptide comprising an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.; and b) a facilitating agent linked to the extracellular domain of the ErbB-3 protein , or a functional fragment thereof, directly or via a linker, wherein the agent facilitates: i) affinity isolation or purification of a conjugate; ii) attachment of a conjugate to a surface; or iii) detection of a conjugate.
• the present invention is directed to an antibody, which antibody binds to an epitope in an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• Pharmaceutical compositions and/or vaccines comprising the extracellular domain of the ErbB-3 protein, or a functional fragment thereof, or nucleic acids encoding and antibodies binding to such extracellular domain or functional fragments thereof are also provided.
• Figure 1 depicts B3 cDNA sequence (SEQ ID NO:4).
• Figure 2 illustrates restriction enzyme digestion of B3 plasmid.
• Lane 1 1KB ladder (NEB).
• Lane2-9 DNA for diagnostic digestion with BamHI/Xbal. All are correct clones except the colony on Lane 5.
• LanelO pCDNA3 vector alone digested with BamHI/Xbal.
• Figure 3 illustrates B3 plasmid construction.
• Figure 4 illustrates isolation and/or purification and SDS-PAGE analysis of B3 protein.
• Lane 1-4 BSA control, lOug, 5 ug, 3ug, lug/lane respectively.
• Lane5 Protein marker, 7708S NEB.
• Lane6-7 B3 protein expressed for COS7.
• Figure 5 depicts B3 amino acid sequence (SEQ ID NO:2).
• Figure 6 depicts DE3-1 cDNA sequence (SEQ ID NO: 5).
• Figure 7 illustrates DE3-1 plasmid construction.
• Figure 8 illustrates restriction enzyme digestion of DE3-1 plasmid.
• Lanel DE3-1 in pGEX4T-l, cut with BamHI/XhoI.
• Lane2 DE3-1 in pET32a, cut with BamHI/XhoI.
• Lane3 IKd ladder (NEB).
• Figure 9 illustrates SDS-PAGE analysis of DE3-1 expression. Lanel: before induction. Lane2: after induction. Lane3: inclusion body. Lane4: supernatant after sonication.
• Figure 10 illustrates isolation and/or purification and SDS-PAGE analysis of DE3-1 protein.
• Lanel Flow through.
• Lane2-8 Eluates from NTA His tag affinity column.
• Figure 11 depicts DE3-1 amino acid sequence (SEQ ID NO:3).
• FIG. 12 illustrates the effect of various vaccines on incidence of FVB/N transgenic mice
• Figure 13 illustrates the effect of various drugs on tumor growth in mice (5 weeks).
• Figure 14 illustrates the tumor-inhibitory effect of various drugs against tumor growth (5 weeks).
• Figure 15 illustrates the effect of DE3-1 on the growth of breast cancer in mice (5 weeks).
• Figure 16 illustrates the tumor-inhibitory rate of DE3-1 against tumor growth (5 weeks).
• Figure 17 illustrates experiment on cross immunity between B2 and B3 antigen (B3 protein wrapped).
• FIG. 18 illustrates experiment on cross immunity between B2 and B3 antigen (B2 protein wrapped).
• Figure 19 illustrates Result of PCR amplification
• Lane 2 192bp ErbB3-fl2 gene obtained by RT-PCR; : Lane 1 DNA marker
• Figure20 illustrates Screening for expression engineering strain.
• Figure21 illustrates Experimental results of anti-tumor effect of rhErbB3-fl2
• Figure22 illustrates Experimental results of anti-tumor effect of rhErbB3-f78
• Figure23 depicts ErbB3-fl2 amino acid sequence (SEQ ID NO: 14).
• Figure24 depicts ErbB3-f78 cDNA sequence (SEQ ID NO: 15)
• Figure25 depicts ErbB3-f78 amino acid sequence (SEQ ID NO: 16)
• neoplasm neoplasia
• cancer refers to a general term for diseases caused by any type of malignant tumor.
• malignant refers to primary tumors that have the capacity of metastasis with loss of both growth control and positional control.
• ez-b refers to two oncogenes, erb A and erb B, associated with eiythroblastosis virus (an acute transforming retro virus).
• immune response refers to alteration in the reactivity of an organism's immune system in response to an antigen; in vertebrates, this may involve antibody production, induction of cell-mediated immunity, complement activation or development of immunological tolerance.
• immune response potentiator refers to a substance that enhances an antigen's effect in eliciting an immune response.
• vaccine refers to any compositions intended for active immunological prophylaxis.
• a vaccine may be used therapeutically to treat a disease, or to prevent development of a disease or to decrease the severity of a disease either proactively or after infection.
• Exemplary vaccines include, but are not limited to, preparations of killed microbes of virulent strains or living microbes of attenuated (variant or mutant) strains, or microbial, fungal, plant, protozoa, or metazoa derivatives or products.
• Vaccine also encompasses protein/peptide and nucleic acid/oligonucleotides based vaccines.
• anti-neoplasm agent used interchangeably with anti-neoplastic agent, anti-tumor or anti-cancer agent
• anti-neoplasm treatment refers to any agents used in the anti-neoplasm treatment. These include any agents, that when used alone or in combination with other compounds, can alleviate, reduce, ameliorate, prevent, or place or maintain in a state of remission of clinical symptoms or diagnostic markers associated with neoplasm, tumor or cancer, and can be used in methods, combinations and compositions provided herein.
• Anti-neoplastic agents include, but are not limited to, anti-angiogenic agents, alkylating agents, antimetabolite, certain natural products, platinum coordination complexes, anthracenediones, substituted ureas, methylhydrazine derivatives, adrenocortical suppressants, certain hormones and antagonists, anti-cancer polysaccharides and certain herb extracts such as Chinese herb extracts.
• an "anti-neoplastic treatment” refers to any treatment designed to treat the neoplasm, tumor or cancer by lessening or ameliorating its symptoms. Treatments that prevent the occurrence of neoplasm, tumor or cancer or lessen its severity are also contemplated.
• anti-neoplasm agent or anti-tumor or anti-cancer agent or anti-neoplasm treatment
• an effective amount of a compound for treating a particular disease is an amount that is sufficient to ameliorate, or in some manner reduce the symptoms associated with the disease. Such amount may be administered as a single dosage or may be administered according to a regimen, whereby it is effective. The amount may cure the disease but, typically, is administered in order to ameliorate the symptoms of the disease. Repeated administration may be required to achieve the desired amelioration of symptoms.
• treatment means any manner in which the symptoms of a conditions, disorder or disease are ameliorated or otherwise beneficially altered. Treatment also encompasses any pharmaceutical use of the compositions herein.
• amelioration of the symptoms of a particular disorder by administration of a particular pharmaceutical composition refers to any lessening, whether permanent or temporary, lasting or transient that can be attributed to or associated with administration of the composition.
• antibody is used in the broadest sense and specifically covers intact monoclonal antibodies, polyclonal antibodies, multi-specific antibodies, e.g., bi-specific antibodies, formed from at least two intact antibodies, and antibody fragments so long as they exhibit the desired biological activity.
• the antibody may be an IgM, IgG, e.g., IgGi, IgG 2 , IgG 3 or IgG 4 , IgD, IgA or IgE, for example.
• antibody fragments comprise a portion of an intact antibody, generally the antigen binding or variable region of the intact antibody.
• antibody fragments include Fab, Fab', F(ab') , and Fv fragments; diabodies; single-chain antibody molecules; and multi-specific antibodies formed from antibody fragments.
• monoclonal antibody refers to an antibody obtained from a population of substantially homogeneous antibodies, i.e., the individual antibodies comprising the population are identical except for possible naturally occurring mutations that may be present in minor amounts. Monoclonal antibodies are highly specific, being directed against a single antigenic site.
• each monoclonal antibody is directed against a single determinant on the antigen.
• the monoclonal antibodies are advantageous in that they are synthesized by the hybridoma culture, uncontaminated by other immunoglobulins.
• polyclonal antibody refers to antibodies produced by several clones of B- lymphocytes as would be the case in a whole animal. Usually refers to antibodies raised in immunized animals, whereas a monoclonal antibody is the product of a single clone of B- lymphocytes, usually maintained in vitro.
• hybridoma refers to a cell hybrid in which a tumour cell forms one of the original source cells.
• exemplary hybridoma are hybrids between T- or B-lymphocytes and appropriate myeloma cell lines that produce a monoclonal antibody.
• humanized antibodies refer to antibodies that are modified to include “human” sequences of amino acids so that administration to a human will not provoke an immune response.
• Methods for preparation of such antibodies are known.
• the hybridoma that expresses the monoclonal antibody is altered by recombinant DNA techniques to express an antibody in which the amino acid composition of the non- ariable regions is based on human antibodies.
• Computer programs have been designed to identify such regions.
• production by recombinant means refers to production methods that use recombinant nucleic acid methods that rely on well known methods of molecular biology for expressing proteins encoded by cloned nucleic acids.
• complementary when referring to two nucleic acid molecules, means that the two sequences of nucleotides are capable of hybridizing, preferably with less than 25%, more preferably with less than 15%, even more preferably with less than 5%, most preferably with no mismatches between opposed nucleotides. Preferably the two molecules will hybridize under conditions of high stringency.
• stringency of hybridization in determining percentage mismatch is as follows:
• medium stringency 0.2 x SSPE, 0.1% SDS, 50DC (also referred to as moderate stringency);
• vector refers to discrete elements that are used to introduce heterologous DNA into cells for either expression or replication thereof. Selection and use of such vehicles are well known within the skill of the artisan.
• An expression vector includes vectors capable of expressing DNA's that are operatively linked with regulatory sequences, such as promoter regions, that are capable of effecting expression of such DNA fragments.
• an expression vector refers to a recombinant DNA or RNA construct, such as a plasmid, a phage, recombinant virus or other vector that, upon introduction into an appropriate host cell, results in expression of the cloned DNA.
• Appropriate expression vectors are well known to those of skill in the art and include those that are replicable in eukaryotic cells and/or prokaryotic cells and those that remain episomal or those which integrate into the host cell genome.
• a promoter region or promoter element refers to a segment of DNA or RNA that controls transcription of the DNA or RNA to which it is operatively linked.
• the promoter region includes specific sequences that are sufficient for RNA polymerase recognition, binding and transcription initiation. This portion of the promoter region is referred to as the promoter.
• the promoter region includes sequences that modulate this recognition, binding and transcription initiation activity of RNA polymerase. These sequences may be cis acting or may be responsive to trans acting factors. Promoters, depending upon the nature of the regulation, may be constitutive or regulated. Exemplary promoters contemplated for use in prokaryotes include the bacteriophage T7 and T3 promoters, and the like.
• operatively linked or operationally associated refers to the functional relationship of DNA with regulatory and effector sequences of nucleotides, such as promoters, enhancers, transcriptional and translational stop sites, and other signal sequences.
• operative linkage of DNA to a promoter refers to the physical and functional relationship between the DNA and the promoter such that the transcription of such DNA is initiated from the promoter by an RNA polymerase that specifically recognizes, binds to and transcribes the DNA.
• protein binding sequence refers to a protein or peptide sequence that is capable of specific binding to other protein or peptide sequences generally, to a set of protein or peptide sequences or to a particular protein or peptide sequence.
• epitope tag refers to a short stretch of amino acid residues corresponding to an epitope to facilitate subsequent biochemical and immunological analysis of the "epitope tagged” protein or peptide.
• Epipe tagging is achieved by appending the sequence of the "epitope tag” to the protein-encoding sequence in an appropriate expression vector.
• Epipe tagged proteins can be affinity purified using highly specific antibodies raised against the tags.
• Protein A or Protein G refers to proteins that can bind to Fc region of most IgG isotypes. Protein A or Protein G are typically found in the cell wall of some strains of staphylococci. It is intended to encompass Protein A or Protein G with conservative amino acid substitutions that do not substantially alter its activity.
• nucleotide binding sequence refers to a protein or peptide sequence that is capable of specific binding to nucleotide sequences generally, to a set of nucleotide sequences or to a particular nucleotide sequence.
• lipid binding sequence refers to a protein or peptide sequence that is capable of specific binding to lipids generally, to a set of lipids or to a particular lipid.
• polysaccharide binding sequence refers to a protein or peptide sequence that is capable of specific binding to polysaccharides generally, to a set of polysaccharides or to a particular polysaccharide.
• metal binding sequence refers to a protein or peptide sequence that is capable of specific binding to metal ions generally, to a set of metal ions or to a particular metal ion.
• the present invention is directed to a method for preventing, treating or delaying neoplasm in a mammal, which method comprises administering to a mammal, to which such prevention, treatment or delay is needed or desirable, an effective amount of an ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, whereby an immune response is generated against said neoplasm and said neoplasm is prevented, treated or delayed.
• the present method can be used for preventing, treating or delaying neoplasm in any mammals, such as mice, rats, rabbits, cats, dogs, pigs, cows, ox, sheep, goats, horses, monkeys and other non-human primates.
• the present method can be used for preventing, treating or delaying neoplasm in humans.
• Any suitable ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, that can elicit an immune response to the neoplasm to be treated, prevented or delayed, can be used in the present method.
• the ErbB-3 elicited immune response can be cellular, humoral or both.
• ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, disclosed in U.S. Patent No. 5,820,859 can be used in the present method.
• ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, derived from human ErbB-3 is used in the present method.
• Any ErbB-3 protein, or a functional fragment thereof, with conservative amino acid substitutions that do not substantially alter its activity can be used in the present method.
• an effective amount of an extracellular domain of an ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an extracellular domain of an ErbB-3 protein, or a functional fragment thereof is administered.
• an effective amount of the ErbB-3 protein comprising an amino acid sequence set forth in SEQ ID NO:l or at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO:14, or at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16 is administered.
• an effective amount of the extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 is administered.
• the present method can further comprise administering an immune response potentiator to the mammal.
• the immune response potentiator can be administered prior to, concurrently with, or subsequent to the administration of the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid an ErbB-3 protein, or a functional fragment thereof.
• Exemplary immune response potentiators include Bacille Calmette-Guerin (BCG) (Ratliff, Eur.
• the formulation, dosage and route of administration of ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, preferably in the form of pharmaceutical compositions can be determined according to the methods known in the art (see e.g., Remington: The Science and Practice of Pharmacy, Alfonso R.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof can be formulated for oral, rectal, topical, inhalational, buccal (e.g., sublingual), parenteral (e.g., subcutaneous, intramuscular, intradermal, or intravenous), transdermal administration or any other suitable route of administration.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof can be administered to any suitable place in the mammal.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof is administered to the neoplasm in situ, i.e., administered to the place where the neoplasm is located or the vicinity thereof.
• the present method can further comprise administering an immune response potentiator to the neoplasm in situ.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof can be administered alone.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof is co-administered with a pharmaceutically acceptable carrier or excipient.
• a pharmaceutically acceptable carrier or excipient can be used in the present method (See e.g., Remington: The Science and Practice of Pharmacy, Alfonso R. Gennaro (Editor) Mack Publishing Company, April 1997).
• the present method can be used alone. Alternatively, the present method can be used in combination with other anti-neoplasm treatment, e.g., radiationtherapy, chemotherapy or surgery. The present method can also be used in combination with other anti-neoplasm agent.
• Such other anti-neoplasm treatment or agent can be used before, with or after the administration of ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof can be co- administered with an anti-neoplasm agent.
• anti-neoplasm agent any suitable anti-neoplasm agent can be used in the present method.
• exemplary anti-neoplasm agents include an anti-angiogenic agent (See e.g., Auerbach and Auerbach, Pharmacol. Ther., 63(3):265-311 (1994)), an alkylating agent, an antimetabolite, a natural product, a platinum coordination complex, an anthracenedione, a substituted urea, a methylhydrazine derivative, an adrenocortical suppressant, a hormone, an antagonist, an oncogene inhibitor, a tumor suppressor gene or protein, an anti-oncogene antibody and an anti-oncogene antisense oligonucleotide.
• an anti-angiogenic agent See e.g., Auerbach and Auerbach, Pharmacol. Ther., 63(3):265-311 (1994)
• an alkylating agent an antimetabolite
• an alkylating agent
• the nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, or any tumor suppressor gene can be used in the form of naked DNA, complexed DNA, cDNA, plasmid DNA, RNA or other mixtures thereof as components of the gene delivery system.
• the nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, or the tumor suppressor gene is included in a viral vector.
• Any viral vectors that are suitable for gene therapy can used in the combination.
• an adenovirus vector U.S. Patent No. 5,869,305
• a simian virus vector U.S. Patent No. 5,962,274
• a conditionally replicating human immunodeficiency viral vector U.S. Patent No.
• retrovirus retrovirus
• SN40 Herpes simplex viral amplicon vectors
• Vaccinia virus vectors can be used.
• the genes can be delivered in a non- viral vector system such as a liposome wherein the lipid protects the D A or other biomaterials from oxidation during the coagulation.
• the present method can be used to treat, prevent or delay any suitable neoplasms or cancers.
• the present method is used to treat, prevent or delay any suitable neoplasms or cancers wherein the interaction between ErbB-2 and ErbB-3 is critical for causing or sustaining the neoplasms or cancers.
• the present method can be used to treat, prevent or delay adrenal gland, anus, auditory nerve, bile ducts, bladder, bone, brain, breast, bruccal, central nervous system, cervix, colon, ear, endometrium, esophagus, eye, eyelids, fallopian tube, gastrointestinal tract, head and neck, heart, kidney, larynx, liver, lung, mandible, mandibular condyle, maxilla, mouth, nasopharynx, nose, oral cavity, ovary, pancreas, parotid gland, penis, pinna, pituitary, prostate gland, rectum, retina, salivary glands, skin, small intestine, spinal cord, stomach, testes, thyroid, tonsil, urethra, uterus, vagina, vestibulocochlear nerve and vulva neoplasm.
• the present method is used to treat, prevent or delay breast, ovary, stomach, prostate, colon and lung cancer. More preferably, the present method is used to treat, prevent or delay breast cancer.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, alone or in combination with other agents, carriers or excipients may be formulated for any suitable administration route, such as intracavemous injection, subcutaneous injection, intravenous injection, intramuscular injection, intradermal injection, oral or topical administration.
• the method may employ formulations for injectable administration in unit dosage form, in ampoules or in multidose containers, with an added preservative.
• the formulations may take such forms as suspensions, solutions or emulsions in oily or aqueous vehicles, and may contain formulatory agents such as suspending, stabilizing and/or dispersing agents.
• the active ingredient may be in powder form for constitution with a suitable vehicle, sterile pyrogen-free water or other solvents, before use.
• Topical administration in the present invention may employ the use of a foam, gel, cream, ointment, transdermal patch, or paste.
• compositions and methods for their administration that may be employed for use in this invention include, but are not limited to those described in U.S. Patent Nos. 5,736,154; 6,197,801 Bl; 5,741,511; 5,886,039; 5,941,868; 6,258,374 Bl; and 5,686,102.
• the magnitude of a therapeutic dose in the treatment or prevention will vary with the severity of the condition to be treated and the route of administration.
• the dose, and perhaps dose frequency will also vary according to age, body weight, condition and response of the individual patient.
• the attending physician would know how to and when to terminate, interrupt or adjust therapy to lower dosage due to toxicity, or adverse effects. Conversely, the physician would also know how to and when to adjust treatment to higher levels if the clinical response is not adequate (precluding toxic side effects).
• Dosage forms include tablets, troches, cachet, dispersions, suspensions, solutions, capsules, patches, and the like. See, Remington's Pharmaceutical Sciences.
• the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, alone or in combination with other agents may be combined as the active in intimate admixture with a pharmaceutical carrier or excipient, such as beta-cyclodextrin and 2-hydroxy-propyl-beta-cyclodextrin, according to conventional pharmaceutical compounding techniques.
• a pharmaceutical carrier or excipient such as beta-cyclodextrin and 2-hydroxy-propyl-beta-cyclodextrin, according to conventional pharmaceutical compounding techniques.
• the carrier may take a wide fo ⁇ n of preparation desired for administration, topical or parenteral.
• compositions for parenteral dosage form such as intravenous injection or infusion
• similar pharmaceutical media may be employed, water, glycols, oils, buffers, sugar, preservatives, liposomes, and the like known to those of skill in the art.
• parenteral compositions include, but are not limited to dextrose 5% w/v, normal saline or other solutions.
• the total dose of the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, alone or in combination with other agents to be administered may be administered in a vial of intravenous fluid, ranging from about 1 ml to 2000 ml.
• the volume of dilution fluid will vary according to the total dose administered.
• kits for carrying out the therapeutic regimens of the invention comprise in one or more containers therapeutically effective amounts of the ErbB-3 protein, or a functional fragment thereof, or a nucleic acid encoding an ErbB-3 protein, or a functional fragment thereof, alone or in combination with other agents, in pharmaceutically acceptable form.
• Preferred pharmaceutical forms would be in combination with sterile saline, dextrose solution, or buffered solution, or other pharmaceutically acceptable sterile fluid.
• the composition may be lyophilized or dessicated; in this instance, the kit optionally further comprises in a container a pharmaceutically acceptable solution, preferably sterile, to reconstitute the complex to form a solution for injection purposes.
• Exemplary pharmaceutically acceptable solutions are saline and dextrose solution.
• kits of the invention further comprises a needle or syringe, preferably packaged in sterile form, for injecting the composition, and/or a packaged alcohol pad. Instructions are optionally included for administration of composition by a physician or by the patient.
• the present invention is directed to an isolated nucleic acid fragment, which isolated nucleic acid fragment hybridizes, under low, middle or high stringency, with a sequence of nucleotides, or a complementary strand thereof, encoding an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO:16.
• the isolated nucleic acid fragment hybridizes, under high stringency, with a sequence of nucleotides, or a complementary strand thereof, encoding an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO: 2 or SEQ ID NO: 3 an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the isolated nucleic acid fragment comprises a sequence of nucleotides, or a complementary strand thereof, encoding an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the isolated nucleic acid fragment comprises a sequence of nucleotides, or a complementary strand thereof, set forth in SEQ ID NO:4 ( Figure 1) or SEQ ID NO: 5 ( Figure 6) or an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the isolated nucleic acid fragments can be in any suitable form.
• the isolated nucleic acid fragment can comprise DNA, RNA, PNA or a derivative thereof.
• the isolated nucleic acid fragment can comprise both DNA and RNA or derivatives thereof.
• the isolated nucleic acid fragment can be single-stranded and be ready to be used in a hybridization analysis.
• the isolated nucleic acid fragment can be double-stranded and be denatured into single-stranded prior to the hybridization analysis.
• the isolated nucleic acid fragment can comprise any kind of oligonucleotide or nucleic acid strand(s) containing genetically-coded and/or naturally occurring structures.
• the isolated nucleic acid fragments can comprise non-natural elements such as non-natural bases, e.g., inosine and xanthine, non-natural sugars, e.g., 2'-methoxy ribose, or non-natural phosphodiester linkages, e.g., methylphosphonates, phosphorothioates and peptides.
• non-natural bases e.g., inosine and xanthine
• non-natural sugars e.g., 2'-methoxy ribose
• non-natural phosphodiester linkages e.g., methylphosphonates, phosphorothioates and peptides.
• the isolated nucleic acid fragments can be produced by any suitable methods.
• the isolated nucleic acid fragments can be chemically synthesized (See generally, Ausubel (Ed.) Current Protocols in Molecular Biology, 2.11. Synthesis and purification of oligonucleotides, John Wiley & Sons, Inc. (2000)), isolated from a natural source, produced by recombinant methods or a combination thereof.
• the isolated nucleic acid fragments are produced by recombinant methods.
• the isolated nucleic acid fragment can be labeled for various purposes, e.g., facilitating detection, purification and/or attachment to a surface.
• the label can be a chemical, an enzymatic, an immunogenic, a radioactive, a fluorescent, a luminescent or a FRET label.
• a plasmid, which plasmid comprises the above nucleic acid fragment is also provided.
• a cell, which cell comprises the above plasmid is further provided. Any suitable cells can be used, e.g., bacterial cells, yeast cells, fungal cells, plant cells, insect cells, animal cells and human cells.
• the present invention is directed to a method for producing an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, which method comprises growing the above cells under conditions whereby the extracellular domain of the ErbB- 3 protein, or a functional fragment thereof, is expressed by the cells, and recovering the expressed extracellular domain of the ErbB-3 protein, or a functional fragment thereof.
• the present invention is directed to a substantially purified protein or peptide, which comprises an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16
• the extracellular domain of the ErbB-3 protein, or a functional fragment thereof can be produced by any suitable methods.
• the extracellular domain of the ErbB-3 protein, or a functional fragment thereof can be chemically synthesized, isolated from a natural source, produced by recombinant methods or a combination thereof.
• the extracellular domains of the ErbB-3 protein, or functional fragments thereof are produced by recombinant methods.
• the present invention is directed to a conjugate, which conjugate comprises: a) a protein or peptide comprising an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3; an amino acid sequence comprising at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14; or an amino acid sequence comprising at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16; and b) a facilitating agent linked to the extracellular domain of the ErbB-3 protein , or a functional fragment thereof, directly or via a linker, wherein the agent facilitates: i) affinity isolation or purification of a conjugate; ii) attachment of a conjugate to a surface; or iii) detection of a conjugate.
• the conjugate can be a fusion protein.
• the ErbB-3 protein, or a functional fragment thereof, and the facilitating agent can be linked by other means.
• the conjugate is a fusion protein, a nucleic acid encoding the conjugate is also provided.
• the conjugates can be produced by chemical conjugation, such as via thiol linkages, but are preferably produced by recombinant means as fusion proteins.
• the peptide or fragment thereof is linked to either the N-terminus or C-terminus of the ErbB-3 protein, or a functional fragment thereof.
• chemical conjugates the peptide or fragment thereof may be linked anywhere that conjugation can be effected, and there may be a plurality of such peptides or fragments linked to a single the ErbB-3 protein, or a functional fragment thereof, or to a plurality thereof.
• Conjugation can be effected by any method known to those of skill in the art. As described below, conjugation can be effected by chemical means, through covalent, ionic or any other suitable linkage. For example, the reagents and methods for conjugation as disclosed in WO 01/02600 can be used.
• the conjugate is a fusion protein, which can be isolated or purified through affinity binding between the protein or peptide fragment of the fusion protein and an affinity binding moiety. Any kind of affinity interaction can be used for isolating or purifying the fusion protein.
• the affinity interactions such as those described herein, but not limited to, are protein/protein, protein/nucleotide, protein/lipid, protein/polysaccharide, or protein/metal interactions.
• the conjugate can be attached to a surface. More preferably, the conjugate can be attached to the surface through affinity binding between the facilitating agent of conjugate and an affinity binding moiety on the surface. Any kind of affinity interaction can be used for attaching the conjugate, including the protein/protein, protein/nucleotide, protein/lipid, protein/polysaccharide, or protein/metal interactions.
• the present invention is directed to a pharmaceutical composition, which pharmaceutical composition comprises an isolated nucleic acid fragment which isolated nucleic acid fragment hybridizes, under low, middle or high stringency, with a sequence of nucleotides, or a complementary strand thereof, encoding an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14 or at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16 and a pharmaceutically acceptable carrier or excipient.
• the isolated nucleic acid comprises a sequence of nucleotides, or a complementary strand thereof, encoding an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14 or at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the pharmaceutical composition can further comprise an immune response potentiator and/or an anti-neoplasm agent.
• Vaccines comprising the above isolated nucleic acid fragments, alone or in combination with an immune response potentiator, are also provided.
• the present invention is directed to a pharmaceutical composition, which pharmaceutical composition comprises a substantially purified protein or peptide, which comprises an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14 or at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16 and a pharmaceutically acceptable carrier or excipient.
• the pharmaceutical composition can further comprise an immune response potentiator and/or an anti-neoplasm agent.
• Vaccines comprising the above substantially purified proteins or peptides, alone or in combination with an immune response potentiator, are also provided.
• the present invention is directed to an antibody, which antibody binds to an epitope in an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14 or at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the antibody binds specifically to an epitope in an extracellular domain of the ErbB-3 protein, or a functional fragment thereof, comprising an amino acid sequence set forth in SEQ ID NO:2 or SEQ ID NO:3 or at least amino acid residues 24-81 of the amino acid sequence set forth in SEQ ID NO: 14 or at least amino acid residues 2-139 of the amino acid sequence set forth in SEQ ID NO: 16.
• the antibody can be in any suitable form.
• the antibody can a polyclonal, monoclonal, chimeric, single chain, human or humanized antibody (See e.g., U.S. Patent No. 5,968,511).
• the antibody in various forms, can be made according to any methods known in the art (See, e.g., Coligan et al. (Ed.), Current Protocols in Immunology, John Wiley & Sons, Inc. (2000)).
• Pharmaceutical compositions, comprising the above antibodies, alone or in combination with anti-neoplasm agent, and a pharmaceutically acceptable carrier or excipient are also provided.
• B3 ,DE3-1, rhErbB3-fl2 and rhErbB3-f78 as an anti-tumor vaccine can significantly lower the incidence of the development of human cancer such as breast cancer in high-risk population.
• the inventor provided a method of B3.DE3-1, rhErbB3-fl2 and rhErbB3-f78 as an anti- tumor vaccine significantly lowering the incidence of the development of human cancer such as breast cancer in high-risk population
• the inventor discovered that there was significant effect of B3, DE3-1.DE3-1, rhErbB3-fl2 and rl ⁇ ErbB3-fJ8 as an anti-tumor vaccine on postponing the tumor development such as human breast cancer.
• the inventor discovered that there was significant inhibitory effect of B3, DE3-1, rhErbB3- fl2 and rhErbB3-f78 as an anti-tumor vaccine on the tumor development such as human breast cancer.
• the inventor discovered a method of inhibiting cancerous growth such as breast cancer and that was achieved through inducing immune responses.
• the aforementioned cells may be a tumor cells, much probably they are human breast cancer cells and other cancerous cells with Erb2/ErbB3 over-expression.
• ErbB3 protein antigen expressed through genetic engineering It is ErbB3 protein antigen expressed through genetic engineering that made the aforementioned method come true.
• De3-1, rhErbB3-fl2 and rhErbB3-f78 is a protein expressed by E. Coli;
• B3 was an antigen of protein expressed by Eucaryotic cells or ErbB3 antigen produced by other methods, ErbB3 antigen may be ErbB3 molecule or part of a segment of the molecule.
• ErbB 3 vaccine which is produced by different methods can inhibit tumor growth under certain dosage level.
• the aforementioned cancers included breast cancer, ovary carcinoma, gastric carcinoma, and prostate carcinoma and lung cancer.
• B3,De3-l, rhErbB3-fl2 and rhErbB3-fJ8 The vaccine involved in the present experiment included protein molecule in the extra-cell membranes region of ErbB3 and part of the protein segment of the extra-cell membranes, they are named as B2 and SD32.
• the preparation of B3 and DE3-1, rhErbB3-fl2 and rhErbB3-fJ8 is as follow:
• B3 gene is the encoded cDNA sequence of protein of ErbB3 extra-cell membrane region (Fig 1); amplified with PCR, sequence of the primer was: Primerl, 5'TCTGCGGAGTCATGAGGGC (SEQ ID NO:6)
• the italics are flag sequence.
• the targeting gene was cloned into pMD-18T vector; the transformer will be cut by BamHI/Sall after enzyme digestion and identified of the sequence to be correct, then connected to pCDNA3BamHI/xhol.
• Fig 4 illustrated the B3 protein purification, affinity chromatography purification.
• Fig 5 showed the targeting protein and amino acid sequence of B3 purified protein after amino acid sequencing.
• Fig 6 showed cDNA sequence of encoded extra-cell membrane ErbB3 protein segment of PCR amplified targeting gene. Structure of the expressed plasmid: targeting gene segment was cut out with BamHI/XhoI from pGEX4T-l vector (Phamacia company), connecting into pET32a vector (Novagen company) BabHI/XhoI, the protein was expressed by T7 promoter, N end fused with Trx Tag, His Tag and S-Tag, Fig 7 illustrates the diagram. Fig 8 illustrates the identification of the plasmid composition.
• rhErbB3-fl2 and rhErbB3-fJ8 (SEQ ID NO:16)Preparation rhErbB3-fl2(SEQ ID NO: 14) gene is the encoded cDNA sequence of protein of ErbB3 extra-cell membrane region ; amplified with PCR, sequence of the primer was: PI: 5'- TGG CCA TGG ACA TCA AGC ATA ATC GGC C-3 ' (SEQ ID NO:12) ( 1645— 1664)
• Ncol P2 3'- GTG CTC GAG AGG CTC CCC ATT CAG AAA G-5' (SEQ ID NO:13) ( 1800 — 1818)
• B3, DE3-1 The preventive effect of B3, DE3-1 on tumor development. 8-10 weeks old FVB/N transgenic mice (bought from Jackson Lab USA) was selected as experiment animals, the mice were divided into 5 groups with 40 mice each, they were control group, B2, B3 and DE3-1 group; BSA, B2, SD32, B3 ,DE3-1 was mixed with Freud's adjuvant (CFA, complete Freud's adjuvant, bought from Sigma company) and injected abdominally every 20 days for 7 injections respectively to various groups. The dosage of BSA, B2, SD32, B3 and DE3-1 vaccine was 10, 5, 10, 1 and lO ⁇ g/mouse/injection. Weekly monitor tumour development. The tumour development was verified and analysed statistically.
• CFA Freud's adjuvant
• Transplanted tumour model after immunohistological screening test, about 1000mm tumour mass was cut down from spontaneous tumour of neu protein over-expressed FVB/N transgenic mice. The tumour mass was abraded into single cells with nylon net, the amount injected under the breast of each FVB/N trans-genic mice was 5 X 10 6 cells. About 10-14 days after inoculation, tumor was palpable (>5mm) in the control group, demonstrating that the animal model was established successfully.
• inhibitory rate [(tumor weight of control group — tumor weight of experiment groups) / tumor weight of control group] X 100.
• Preparing animal and transplanted animal tumor model The same as (Experiment on therapeutic effect of B3 and DE3-1 rhErbB3-fl2 and rhErbB3-f78 vaccine on immune therapy against tumor). No treatment was given to the control group, histag protein was injected to the negative control group, and Adriamycin (Santou MingZhi Pharmaceuticals) was administered for the positive control group, 5 ⁇ g, 20 ⁇ g and 80 ⁇ g was given to DE3-1 group respectively.
• Adriamycin 2.2mg/kg was injected abdominally for consecutive 7 days in mice of the positive control group; histag protein + Al(OH)3 was injected abdominally for mice of the negative control group;
• DE3-1 group the vaccine was absorbed on O.lmg of Al(OH)3 and multi-points subcutaneous injection every 2 weeks for a total of 3 injections were carried out in mice.
• tumor inhibitory rate [(tumor weight of control group — tumor weight of experiment groups) / tumor weight of control group] X 100.
• FVB transgenic mice were immuned with B2 protein and B3 protein respectively, 10 days thereafter, blood was withdrawn and antibody titer was tested with ELISA. 0.3ug/hole of B2 and B3 was wrapped, 1 : 1000 B2 and B3 on each plate were titrated with standard serum respectively, cultured at 37 ° C for 30 minutes, sealed with 1%BSA, added double antibody, color development for 15 minutes with DAD, tested with Bio-Rad 450nm enzyme labeled device.
• the inventor carried out experiment on immune therapy with B3 in transplanted tumor model.
• Table 2 and Figure 13-14 illustrate the effect of various vaccines on tumor growth in mice, demonstrating that the tumor-inhibitory rate of SD32 and B3 were 46%) and 33%> respectively, and that both of them had significant tumor-inhibitory effect (P ⁇ 0.01; t testing ).
• Control group 8 6742.9 + 657.8 4J69 + 0.56
• Negative control group 8 histag protein+Al(OH)3 6476.9+567.9 4.461 + 0.52
• Tumor-inhibitory rate and measured tumor size was consistent among groups with various dosage of DE3-1, the best tumor-inhibitory effect was seen in 20 ⁇ g level of DE3-1, reaching about 28.9%.
• mice were killed, took out the tumor and measured their weight; there were significant difference (P ⁇ 0.001, t test) between the positive control group, groups with various dosage level, negative control group and placebo control group.
• the tumor- inhibitory rate of 5 ⁇ g, 20 ⁇ g and 80 ⁇ g dosage level group were 26.3%, 22.4% and 28.9% respectively.
• ErbB2 receptor existed in part of adenocarcinoma discovered in the previous studies was considered to be associated with cancer development after formation of homogenous dimer.
• Over-expression of ErbB2 was considered to be the major cause of adenocarcinoma development, it is due to: 1) the amplification of ErbB2 gene existed in tumor cells such as breast cancer and ovary carcinoma was the cause of over-expression of ErbB2; 2) Over-expression of ErbB2 leads to phosphorylation in its cellular functional area and affects the interaction between intracellular signal molecule She and ErbB2; 3) the transfection of wild type ErbB2 into fibroblast can lead to cell transformation; 4) the enhancement of the formation of ErbB2 variants from ErbB2 homogenous dimer can also enhance its activity of cell transformation.
• ErbB3 is another new anti- tumor target in addition to ErbB2.
• the inventors clarify that over-experssion of ErbB2 receptor leads to the formation of heterogenous dimer from ErbB2 and ErbB3, and that was the cause of cancer development.
• Discovery of this new target provides us with new concept of anti-cancer therapeutical method: use extra-cell membrane protein of ErbB3 cells for cancer prevention and treatment, to lower the incidence of breast cancer and produce effect against tumor growth.
• the tremendous success of humanized monoclonal antibody-herceptin targeted on ErbB2 is based on the relativity between over-expression of ErbB2 and occurrence of various tumors.
• ErbB2 and ErbB4 receptors in myocardial cells leads to the formation of hetergenous dimer from ErbB2 receptor and ErbB4 receptor; the dimer was very important in the maintain of normal structure of myocardial cells, thus, anti-cancer medicine targeting on ErbB2 receptor has damages on myocardial cells and leads to heart failure; however, anti-cancer drug targeting at ErbB3 receptor doesn't have this adverse reaction. Therefore, the use of ErbB3 as a specific anti-tumor vaccine against breast cancer, ovary carcinoma, gastrocarcinoma, prostate cancer, rectal cancer and lung cancer will play a very important role in the prevention and treatment of these cancers.

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