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Surgical stress-induced alterations in retinoid metabolism in the small intestine: role of oxygen free radicals.

Abstract：

:Oxidative stress in the small intestine can result in altered cell proliferation, migration, and differentiation of villus-crypt cells. Retinoid metabolism is recognized as an important mediator of cellular differentiation in the intestine. This study examined the effect of oxidative stress in retinoid metabolism in a surgical stress model. Surgical stress was performed by handling the intestine as done during laparotomy. Villus-crypt cells were isolated at different time periods and various retinoid concentrations in the cell homogenate and the retinoic acid forming enzymes were quantitated using HPLC. Surgical stress resulted in altered retinoid levels in various cell populations in the small intestine at 1 and 12h. The activity of alkaline phosphatase and retinal oxidase was also altered at these time points and all these changes were prevented by inhibiting superoxide generation using xanthine oxidase inhibitor, allopurinol. These studies suggest that alterations seen in enterocytes during surgical stress may be mediated by changes in retinoid metabolism.

journal_name

Arch Biochem Biophys

journal_title

Archives of biochemistry and biophysics

authors

Prabhu R,Thomas S,Balasubramanian KA

doi

10.1016/j.abb.2004.11.011

subject

Has Abstract

pub_date

2005-02-15 00:00:00

pages

299-305

issue

2

eissn

0003-9861

issn

1096-0384

pii

S0003-9861(04)00659-9

journal_volume

434

pub_type

杂志文章

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