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2003 SEP 10 - (NewsRx.com & NewsRx.net) -- A vaccine that shows promise against tumors, such as prostate cancer tumors, that secrete parathyroid hormone-related protein has been developed.
"Parathyroid hormone-related protein (PTH-rP), a secreted protein produced by prostate carcinoma and other epithelial cancers, is considered a key agent for the development of bone metastases. We investigated the construct GC90/IRIV, composed of immunopotentiating reconstituted influenza virosomes (IRIV) containing PTH-rP gene plasmids (GC90), as a potential tool for human anticancer immunotherapy into humanized mice transgenic for HLA-A(*) 02.01, the human-beta-2 microglobulin, and the human CD8-alpha molecule," scientists writing in the British Journal of Cancer report.
"Intranasal administration of GC90/IRIV resulted in the induction of a PTH-rP-specific multiepitope cytotoxic T-cell (CTL) response," said Antonio Scardino at INSERM U487 in France and collaborators in France, Italy, and Switzerland. "Cytotoxic T cells derived from vaccinated mice were capable of lysing in vitro syngenic murine PTH-rP transfectants and human HLA-A* 02.01+/PTH-rP+ ...
Source: HighBeam Research, Vaccine for tumors secreting parathyroid hormone-related protein...