Differential effects of organosulfur compounds from garlic oil on nitric oxide and prostaglandin E2 in stimulated macrophages

Hsiao Pei Chang, Yue Hwa Chen

研究成果: 雜誌貢獻文章

45 引文 斯高帕斯(Scopus)

摘要

Objective: We investigated the inhibition of nitric oxide (NO) and prostaglandin E2 (PGE2) production by the garlic oil derivatives, diallyl sulfide (DAS), diallyl disulfide (DADS), and allyl methyl sulfide (AMS), in lipopolysaccharide (LPS)-activated RAW 264.7 cells. Methods: Cells were treated with LPS (330 ng/mL) and various concentrations of DAS, DADS, and AMS. NO and PGE2 released into the medium and expressions of inducible NO synthase and cyclooxygenase-2 protein were measured. Results: All three compounds suppressed stimulated NO production, among which AMS exhibited the least inhibition. Western blot analysis showed that DAS and DADS, but not AMS, inhibited the corresponding inducible NO synthase expression. An in vitro study showed that all three compounds possess NO clearance activity, and that DADS and AMS were more effective than DAS. On the contrary, only DAS inhibited activated PGE2 production and cyclooxygenase-2 protein expression. Conclusions: The garlic derivatives, DAS, DADS, and AMS, differentially regulated the production of NO and PGE2 in stimulated macrophages. DAS decreased stimulated NO and PGE2 production by inhibiting inducible NO synthase and cyclooxygenase-2 expressions, and its enzyme inhibiting and NO clearance activity may also partly contribute to the suppression of NO. DADS inhibited activated NO production by decreasing inducible NO synthase expression and by directly clearing NO, whereas AMS suppressed NO mainly through its direct NO clearance activity. Further, neither DADS nor AMS showed any inhibitory effect on stimulated PGE2 production.

原文英語
頁(從 - 到)530-536
頁數7
期刊Nutrition
21
發行號4
DOIs
出版狀態已發佈 - 四月 2005

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Surgery
  • Medicine (miscellaneous)

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