id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-015147-h0o0yqv8	nan	Oral Communications and Posters	2014-09-12		.txt	text/plain	73711	3862	43	Cyclooxygenases (COX) catalyze the first step in the synthesis of prostaglandins (PG) from arachidonic acid.COX-1 is constitutively expressed.The COX-2 gene is an immediate early-response gene that is induced by variety of mitogenic and inflammatory stimuli.Levels of COX-2 are increased in both inflamed and malignant tissues.In inflamed tissues, there is both pharmacological and genetic evidence that targeting COX-2 can either improve (e.g., osteoarthritis) or exacerbate symptoms (e.g., inflammatory bowel disease).Multiple lines of evidence suggest that COX-2 plays a significant role in carcinogenesis.The most specific data that support a cause-and effect relationship between COX-2 and tumorigenesis come from genetic studies.Overexpression of COX-2 has been observed to drive tumor formation whereas COX-2 deficiency protects against several tumor types.Selective COX-2 inhibitors protect against the formation and growth of experimental tumors.Moreover, selective COX-2 inhibitors are active in preventing colorectal adenomas in humans.Increased amounts of COX-2-derived PGE2 are found in both inflamed and neoplastic tissues.The fact that PGE2 can stimulate cell proliferation, inhibit apoptosis and induce angiogenesis fits with evidence that induction of COX-2 contributes to both wound healing and tumor growth.Taken together, it seems likely that COX-2 induction contributes to wound healing in response to injury but reduces the threshold for carcinogenesis.	./cache/cord-015147-h0o0yqv8.txt	./txt/cord-015147-h0o0yqv8.txt