| 摘要 |
<p>A cancer recognition factor (SCM factor) useful in the performance of the structuredness of the cytoplasmic matrix (SCM) test has been isolated, purified to substantial homogeneity, and characterized, and methods for its use have been described. The factor is a peptide of at least 9 amino acid residues including a core sequence of 9 amino acid residues having an amphipathicity profile substantially equivalent to that of the sequence F-L-M-I-D-Q-N-T-K and produces at least a 10 percent decrease in the intracellular fluorescence polarization value of SCM-responding lymphocytes from donors afflicted with cancer. A synthetic SCM factor representing a consensus sequence of M-I-P-P-E-V-K-F-N-K-P-F-V-F-L-M-I-D-Q-N-T-K-V-P-L-F-M-G-K is fully active. Antibodies specific for SCM factor are useful in immunoassays that can detect the factor, including detection in cancer cells grown in vitro. The SCM factor is useful for screening of blood samples and other body fluids or cell aspirates for the presence of malignancy in the donor. The multiple action spectrum of the SCM factor including cancer proliferation and invasion promotion, as well as inhibition of the host's immune defense mechanisms and synthesis of SCM factor by cancer cells, represents a novel target for cancer management. Methods for reducing in vivo activity of the SCM factor, such as dialysis or antibody neutralization, can also be useful in the management of cancer.</p> |
