کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5917408 1163788 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production of prostaglandins, isoprostanes and thromboxane by Aspergillus fumigatus: Identification by gas chromatography-tandem mass spectrometry and quantification by enzyme immunoassay
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
Production of prostaglandins, isoprostanes and thromboxane by Aspergillus fumigatus: Identification by gas chromatography-tandem mass spectrometry and quantification by enzyme immunoassay
چکیده انگلیسی

Aspergillus fumigatus has been reported to produce prostaglandin (PG)-like substances. The molecular structure of these fungal eicosanoids is however still unknown. By using the gas chromatography-tandem mass spectrometry (GC-MS/MS) methodology we identified a number of eicosanoids that were formed upon incubation of the precursor arachidonic acid ethyl ester (AAE, 10 μM) with three strains of A. fumigatus. The eicosanoids identified include the prostaglandins (PG) PGE2, 6-keto-PGF1α (the stable hydrolysis product of prostacyclin PGI2) and PGF2α, the isoprostanes 15(S)-8-iso-PGF2α and 15(S)-8-iso-PGE2, and thromboxane B2 (TxB2, the stable hydrolysis product of TxA2). These eicosanoids are identical with those produced by cyclooxygenases (COX) in humans. The biosynthesis of all of these eicosanoids could not be inhibited by the human COX inhibitors indomethacin (100 μM), acetylsalicylic acid (100 μM) or the non-selective human lipoxygenase (LOX) inhibitor nordihydroguaiaretic acid (100 μM). By contrast, the selen-containing antioxidant ebselen (100 μM) was found to inhibit their synthesis. Our results suggest that mammals and fungi employ different eicosanoid biosynthesis pathways. As some of the detected eicosanoids are potent immunomodulators and bronchoconstrictors, they could play a possible role in pulmonary diseases associated with A. fumigatus infection.

► First exact identification of eicosanoids produced by Aspergillus fumigatus. ► Biosynthesis of these eicosanoids could not be inhibited by the human COX inhibitors. ► These eicosanoids could play a possible role in pulmonary diseases associated with A. fumigatus infection.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Molecular Immunology - Volume 49, Issue 4, January 2012, Pages 621-627
نویسندگان
, , , , ,