1994
DOI: 10.1136/gut.35.5.675
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Patients with adenomatous polyps and carcinomas have increased colonic mucosal prostaglandin E2.

Abstract: 115-4 (21-9), n=15) were not different to control results. Eight patients had carcinomas (rectal (2), sigmoid (4), and caecal (2)) all of which were adenocarcinomas. The cancers (193.6 (40.2), n=8) synthesised more PGE2 than control specimens (p<0001), but were not different to polyps. Cancerassociated mucosa (140.3 (27.7) n=8) synthesised more PGE2 than control and polypassociated mucosa. Colorectal neoplasia is associated with a progressive increase in PGE2 synthesis which may have a role in tumourigenesis a… Show more

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Cited by 243 publications
(149 citation statements)
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“…6,31 PGE 2 levels have been reported to be elevated in colorectal cancer compared with normal colorectal tissue. 32 Thus, PGE 2 may promote tumor progression via its action on cell surface EP 1-4 receptors in both tumor and tumor-surrounding normal cells. 6 However, there are contradictory reports on which EP receptor(s) that mediate effects by PGE 2 , where some reports claim that main effects are mediated mainly through nuclear receptors, (PPARs), although some evidence suggests that PPAR activation does not explain antiproliferative effects by NSAIDs.…”
Section: Discussionmentioning
confidence: 99%
“…6,31 PGE 2 levels have been reported to be elevated in colorectal cancer compared with normal colorectal tissue. 32 Thus, PGE 2 may promote tumor progression via its action on cell surface EP 1-4 receptors in both tumor and tumor-surrounding normal cells. 6 However, there are contradictory reports on which EP receptor(s) that mediate effects by PGE 2 , where some reports claim that main effects are mediated mainly through nuclear receptors, (PPARs), although some evidence suggests that PPAR activation does not explain antiproliferative effects by NSAIDs.…”
Section: Discussionmentioning
confidence: 99%
“…Aspirin covalently and irreversibly modifies the cyclo-oxygenase active site of both PGHS-1 and PGHS-2 by acetylation, whereas other NSAIDs reversibly block PGHS function and thus prostaglandin production via steric hindrance of the cyclo-oxygenase active site (Smith and DeWitt, 1996 (Marnett, 1992). These include: evidence that PGs stimulate proliferation of human colon cancer cell lines in vitro and normal rodent colon epithelial tissue in vivo (Qiao et al, 1995); evidence that progressively increased tissue prostaglandin EB (PGE2) levels are associated with progression of colon carcinogenesis (Pugh and Thomas, 1994); and a possible immunosuppressive effect of PGE2 (Goodwin, 1981). Thus, NSAID inhibition of intestinal prostaglandin production may have a number of direct chemopreventive activities against the progression of colorectal cancer.…”
mentioning
confidence: 99%
“…PGE 2 , the most abundant gastrointestinal PG, regulates many of the normal homeostatic functions of the gut, including motility and secretion (18,31,53). Furthermore, PGE 2 influences mitogenesis (28), promotes growth of tumors (42), and stimulates gene transcription (47). PGE 2 upregulates VEGF in activated macrophages through a receptor-mediated mechanism (3).…”
mentioning
confidence: 99%