J Antibiot (Tokyo). 1987 Aug;40(8):1081-5.

Lipstatin, an inhibitor of pancreatic lipase, produced by Streptomyces toxytricini. I. Producing organism, fermentation, isolation and biological activity.

Weibel EK, Hadvary P, Hochuli E, Kupfer E, Lengsfeld H.

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Central Research Units, F. Hoffmann-La Roche & Co., Ltd., Basel, Switzerland.

Abstract

Lipstatin, a new and very potent inhibitor of pancreatic lipase (the key enzyme of intestinal fat digestion) was isolated from Streptomyces toxytricini. Lipstatin contains a beta-lactone structure that probably accounts for the irreversible lipase inhibition. The IC50 of lipstatin for pancreatic lipase is 0.14 microM. In mice triolein absorption was dose-dependently inhibited by lipstatin, whereas oleic acid was absorbed normally. Other pancreatic enzymes, such as phospholipase A2 and trypsin, were not inhibited even at an inhibitor concentration of 200 microM.

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