title: 5-Lipoxygenase, a marker for early pancreatic intraepithelial neoplastic lesions.
abstract: Pancreatic cancer has an abysmal prognosis because of late diagnosis. Therefore, it is important to identify risk factors if we are to be able to prevent and detect this cancer in an early, noninvasive stage. Pancreatic intraepithelial neoplasias (PanIN) are the precursor lesions which could be an ideal target for chemoprevention. This study shows up-regulation of 5-lipoxygenase (5-LOX) in all grades of human PanINs and early lesions of pancreatic cancer in two different animal models (EL-Kras mice and N-nitrosobis(2-oxopropyl)amine-treated hamsters) by immunohistochemistry. The results were consistent in all tissues examined, including seven chronic pancreatitis patients, four pancreatic cancer patients, one multiorgan donor, nine EL-Kras mice, and three N-nitrosobis(2-oxopropyl)amine-treated hamsters, all with PanINs. Overexpression of 5-LOX in NIH3T3 cells resulted in greater sensitivity of these cells to the growth inhibitory effects of the 5-LOX inhibitor Rev5901. These findings provide evidence that 5-LOX plays a key role in the development of pancreatic cancer. Furthermore, the lipoxygenase pathway may be a target for the prevention of this devastating disease.
authors: Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA.
authors: Rene
authors: R
authors: Hennig
authors: Paul
authors: P
authors: Grippo
authors: Xian-Zhong
authors: XZ
authors: Ding
authors: Sambasiva M
authors: SM
authors: Rao
authors: Markus W
authors: MW
authors: Buchler
authors: Helmut
authors: H
authors: Friess
authors: Mark S
authors: MS
authors: Talamonti
authors: Richard H
authors: RH
authors: Bell
authors: Thomas E
authors: TE
authors: Adrian
mesh_terms: D000230:Adenocarcinoma / Q000201:enzymology* / Q000473:pathology / Q000517:prevention & control; D000818:Animals; D001094:Arachidonate 5-Lipoxygenase / Q000096:biosynthesis* / Q000378:metabolism; D014408:Biomarkers, Tumor / Q000037:antagonists & inhibitors / Q000096:biosynthesis* / Q000378:metabolism; D002273:Carcinogens; D002278:Carcinoma in Situ / Q000201:enzymology / Q000473:pathology; D048708:Cell Growth Processes / Q000502:physiology; D002908:Chronic Disease; D006224:Cricetinae; D006801:Humans; D007150:Immunohistochemistry; D016859:Lipoxygenase Inhibitors / Q000494:pharmacology; D051379:Mice; D008822:Mice, Transgenic; D041681:NIH 3T3 Cells; D009602:Nitrosamines; D010190:Pancreatic Neoplasms / Q000201:enzymology* / Q000473:pathology / Q000517:prevention & control; D010195:Pancreatitis / Q000201:enzymology / Q000473:pathology; D011804:Quinolines / Q000494:pharmacology
chemical_list: D014408:Biomarkers, Tumor; D002273:Carcinogens; D016859:Lipoxygenase Inhibitors; D009602:Nitrosamines; D011804:Quinolines; C049740:alpha-pentyl-3-(2-quinolinylmethoxy)benzenemethanol; C013622:nitrosobis(2-oxopropyl)amine; D001094:Arachidonate 5-Lipoxygenase