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- W2052275957 abstract "Epithelial cells lining the GI tract except in the gastric antrum do not normally express gastrin-releasing peptide receptors (GRP-R). Because GRP-R activation causes the proliferation of many GI cancer cell lines, aberrant expression has been presumed to negatively influence patient survival. We therefore determined the incidence and quality of GRP-R aberrantly expressed by non-antral gastric adenocarcinomas, and evaluated the impact of receptor expression on patient survival. We studied RNA isolated from 20 consecutive non-antral gastric adenocarcinomas, and determined that 8 (40%) aberrantly expressed GRP-R. Of these, 6 (75%) were found to be mutated. Pharmacologically, the effect of these mutations ranged from rendering the GRP-R non-functional to constitutively active. Contrary to expectations, however, survival of patients whose tumor expressed functional GRP-R (18.5 +/- 9.8 months) was not statistically different from those that did not (8.3 +/- 1.8 months; p = 0.24). Thus our data indicate that mutated isoforms of GRP-R are commonly expressed by non-antral gastric adenocarcinomas. However, expression of functional GRP-R does not alter patient survival, suggesting that this receptor may not be clinically important to the growth of gastric cancers." @default.
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- W2052275957 date "1999-02-01" @default.
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- W2052275957 title "Characterization of gastrin-releasing peptide receptors aberrantly expressed by non-antral gastric adenocarcinomas" @default.
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- W2052275957 doi "https://doi.org/10.1016/s0196-9781(98)00164-8" @default.
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