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Abstract Title:

Cyclooxygenase as a target in chemoprevention by probiotics during 1,2-dimethylhydrazine induced colon carcinogenesis in rats.

Abstract Source:

Nutr Cancer. 2015 May-Jun;67(4):603-11. Epub 2015 Mar 26. PMID: 25811420

Abstract Author(s):

Sohini Walia, Rozy Kamal, Sarbjit Singh Kanwar, Davinder Kumar Dhawan

Article Affiliation:

Sohini Walia

Abstract:

The present study was undertaken to assess the effects of potential probiotics in regulating the activity of cyclooxygenase-2 (COX-2) along with other morphological and histological analysis during 1,2-dimethylhydrazine (DMH) induced colon carcinogenesis in rats. The rats were divided into 6 groups viz., normal control, Lactobacillus plantarum (AdF10) treated, Lactobacillus rhamnosus GG (LGG) treated, DMH treated, AdF10 + DMH treated and LGG + DMH treated. Probiotics were supplemented to rats at dose levels of 2× 10(10) cells per day for 6 days in a week. All the treatments were continued for a period of 16 wk. DMH treatment resulted in a statistically significant increase in the levels of total sialic acid (TSA). However, on supplementation with probiotics, a significant reduction in TSA was observed. DMH treatment brought about a significant increase in the expression of COX-2. But, supplementation of probiotics brought down the protein expression to moderate level. Further, supplementation with probiotics was also able to reduce tumor incidence, tumor multiplicity and average tumor size. Therefore, treatment with probiotics has the potential of providing protection against colon cancer by suppressing the COX-2 expression as one of the protective mechanisms.

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Sayer Ji
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