NCIt definition : A recombinant peptide that is chemically identical to or similar to the endogenous
70-kD heat shock protein (HSP70). HSP70 is a molecular chaperone that prevents physiologic
stress-induced cell death by inhibiting both caspase-dependent and caspase-independent
apoptosis. Because this peptide is often overexpressed in tumor cells, autologous
vaccination with HSP70 derived from tumor cells may stimulate the host immune system
to mount a tumoricidal cytotoxic T lymphocyte (CTL) response. (NCI04);