کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1214512 966937 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of free and bound NADPH in aqueous extract of human placenta used as wound healer
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Analysis of free and bound NADPH in aqueous extract of human placenta used as wound healer
چکیده انگلیسی

NADPH is an important biomolecule involved in cellular regeneration. The distribution of free and bound NADPH in aqueous extract of human placenta used as a potent wound healer has been analyzed. Quantification from fluorescence and immuno-affinity chromatography indicates that 75.1 ± 2.2% of NADPH present in the extract exists as free nucleotide or bound to very small peptides or amino acids whereas the rest remains bound to large peptides. Inability to dissociate the bound form of the nucleotide from the large peptides using urea or guanidium hydrochloride indicates that the binding is covalent. Identification of a fragmented mass of m/z 382.94 (nicotinamide + sugar + phosphate) from the NADPH-peptide conjugates supported the intactness of the nicotinamide moiety. Glutathione reductase assay indicated that 95.2 ± 3.5% of the total NADPH pool of the extract can act as cosubstrate of the enzyme. This indicates that while a major fraction of free NADPH of the extract is easily available for cellular processes, the rest can also function locally where the conjugated peptides are deposited.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography B - Volume 877, Issue 24, 15 August 2009, Pages 2435–2442
نویسندگان
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