Methods and compositions for stimulating the immune system

A method for inhibiting the growth or proliferation of breast cancer cells in a subject suffering from breast cancer wherein said breast cancer cells express Recognin-M, said method comprising administering to said subject an effective amount of a first dosage of a composition comprising Recognin-M wherein said administration of said dosage stimulates the immune system of said subject to produce and release anti-Recognin-M antibody that binds and inhibits said breast cancer cells and wherein said Recognin-M is a polypeptide of approximately 10,000 Daltons isolated from MCF-7 cells and wherein said polypeptide has an amino acid composition of about 5 threonine residues, about 5 serine residues, about ½ of a cysteine residue, about 1 methionine residue, about 6 valine residues, about 4 isoleucine residues, about 3 phenylalanine residues, about 6 lysine residues, about 2 histidine residues, about 5 arginine residues, about 9 aspartic acid residues, about 11 glutamic acid residues, about 8 leucine residues, about 2 tyrosine residues, about 4 proline residues, about 9 glycine residues, and about 9 alanine residues, and wherein said Recognin-M elutes at a discreet spot of approximately 0.9 with reference to a standard of cytochrome C on a thin layer chromatogram when chromatographed on a plate of superfine SEPHADEX G-200 with a mobile phase of 0.5 M NaCl in 0.02 M Na2HPO4KH2PO4 phosphate buffer having a pH between 6.6 and 7.0.