کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1175812 961819 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous analysis of angiotensin peptides by LC–MS and LC–MS/MS: Metabolism by bovine adrenal endothelial cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Simultaneous analysis of angiotensin peptides by LC–MS and LC–MS/MS: Metabolism by bovine adrenal endothelial cells
چکیده انگلیسی

Liquid chromatography–electrospray ionization–mass spectrometry (LC–ESI–MS) and liquid chromatography–tandem mass spectrometry (LC–MS/MS) methods were developed to simultaneously determine the concentrations of angiotensin (Ang) II, Ang 1-7, Ang III, and Ang IV in biological samples. The samples were extracted with C18 solid-phase extraction cartridges and separated by a reverse-phase C18 column using acetonitrile in water with 0.1% formic acid as a mobile phase. Ang peptides were ionized by electrospray and detected by triple quadrupole MS in the positive ion mode. (M + 3H)3+ and (M + 2H)2+ ions were chosen as the detected ions in the single ion recording (SIR) mode for LC–MS. The limits of detection (signal/noise [S/N] = 3) using SIR are 1 pg for Ang IV and 5 pg for Ang 1-7, Ang III, and Ang II. Multiple reaction monitoring (MRM) mode was used for LC–MS/MS. The limits of detection (S/N = 3) using MRM are 20 pg for Ang IV and 25 pg for Ang 1-7, Ang III, and Ang II. These methods were applied to analyze Ang peptides in bovine adrenal microvascular endothelial cells. The results show that Ang II is metabolized by endothelial cells to Ang 1-7, Ang III, and Ang IV, with Ang 1-7 being the major metabolite.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytical Biochemistry - Volume 369, Issue 1, 1 October 2007, Pages 27–33
نویسندگان
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