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The Profile of Antioxidant Systems and Lipid Peroxidation Across the Crypt-Villus Axis in Rat Intestine

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Abstract

The distribution of lipid peroxiation and profile of antioxidant-pro-oxidant enzyme systems have been studied in rat intestinal enterocyte across the length of villi. The MDA levels estimated as a measure of lipid peroxidation, under induced or uninduced in vitro conditions, indicated markedly high levels at villus tip cells compared to that in the crypt base. The activities of glutathione-S-transferase and glutathione reductase were three- to sixfold higher in villus tip cells compared to that in the crypt base. However the levels of catalase and superoxide dismutase showed a reverse pattern, being high in the crypt base and lowest in the villus tip region. Feeding coconut oil, sunflower oil, or groundnut oil did not modify the distribution pattern of these systems across crypt-villus unit in rat intestine. These findings suggest that the large amount of free radicals generated in villus tip cells may be responsible for the release of enterocytes from the villus tip as a consequence of apoptosis.

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Acknowledgment

Aasma Turan is the recipient of a Senior Research Fellowship from the Indian Council of Medical Research, New Delhi.

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  1. Department of Biochemistry, Panjab University, Chandigarh, 160014, India

    Aasma Turan & Akhtar Mahmood

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  1. Aasma Turan
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  2. Akhtar Mahmood
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Correspondence to Akhtar Mahmood.

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Turan, A., Mahmood, A. The Profile of Antioxidant Systems and Lipid Peroxidation Across the Crypt-Villus Axis in Rat Intestine. Dig Dis Sci 52, 1840–1844 (2007). https://doi.org/10.1007/s10620-006-9633-z

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  • DOI: https://doi.org/10.1007/s10620-006-9633-z

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