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- W2161036011 abstract "The gastrointestinal peptide, gastrin, stimulates the growth of human pancreatic cancer. A receptor for gastrin activity, the cholecystokinin-C (CCK-C) receptor, has been identified in binding assays, cloned and sequenced, and is a splice variant of the CCK-B receptor. The relationship of gastrin and the CCK-C receptor to the growth of cancer cells was examined in vitro and in vivo. Stable transfection of the sense cDNA of gastrin into human MDA Amp-7 ampullary cancer cells, which normally lack gastrin gene expression but possess CCK-C receptors, increased cell growth up to 10-fold over wild type (WT) and vector-transfected (VT) cells. MDA Amp-7 tumors of gastrin-transfected cells reduced latency time for a visible tumor by 35%, decreased the timetable of tumor incidence, and increased tumor size by at least 2-fold in comparison to WT and VT groups. Transfection of human BxPC-3 pancreatic cancer cells, which normally express gastrin and possess CCK-C receptors, with the antisense cDNA to human gastrin decreased cell number by 30% in culture and tumor size by 53% compared to the WT and VT groups. Transfection of sense gastrin cDNA to monkey COS-1 cells, which normally lack both the gastrin and the CCK-C receptor genes, had no effect on growth. These studies demonstrate that gastrin and the CCK-C receptor form an autocrine loop in human pancreatic cancer that plays a role in regulating growth." @default.
- W2161036011 created "2016-06-24" @default.
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- W2161036011 date "2004-03-01" @default.
- W2161036011 modified "2023-09-25" @default.
- W2161036011 title "Functional significance of gastrin gene expression in human cancer cells" @default.
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- W2161036011 doi "https://doi.org/10.1016/j.regpep.2003.10.013" @default.
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