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Abstract Title:

Asiatic acid attenuates pre-neoplastic lesions, oxidative stress, biotransforming enzymes and histopathological alterations in 1,2-dimethylhydrazine-induced experimental rat colon carcinogenesis.

Abstract Source:

Toxicol Mech Methods. 2017 Feb ;27(2):136-150. Epub 2017 Jan 11. PMID: 28004603

Abstract Author(s):

Aktarul Islam Siddique, Vijay Mani, Sivaranjani Arivalagan, Nisha Susan Thomas, Nalini Namasivayam

Article Affiliation:

Aktarul Islam Siddique

Abstract:

Asiatic acid (AA), a pentacyclic triterpenoid, derived from the tropical medicinal plant Centella asiatica is known to exhibit numerous pharmacological properties. We hypothesized that AA will have chemopreventive potential against 1,2-dimethylhydrazine (DMH)-induced experimental colon carcinogenesis in male Wistar rats. Rats were arbitrarily divided into six groups. Group I rats were processed as control. Group II rats received AA (8 mg/kg b.w., p.o.) and groups III-VI rats received subcutaneous injections of DMH (20 mg/kg b.w.) once a week, for the first four weeks. In addition, groups IV-VI rats received AA at the doses of 2, 4 and 8 mg/kg b.w., respectively, for 16 weeks. Our results discovered that supplementation with AA to the DMH-exposed rats significantly decreased the incidence of polyps and Aberrant crypt foci (ACF) as compared to the DMH-alone-exposed rats. Moreover, in the AA-supplemented DMH-exposed rats, we ascertained increased activities of the antioxidants and decreased levels of lipid peroxidation(LPO) in the liver and circulation and enhanced levels of both LPO and antioxidants in the colon, which were altered in the DMH-alone-exposed rats. Furthermore, we also observed altered activities of vitamins C and E and biotransforming enzymes in DMH-alone-exposed rats, which were reversed on AA supplementation. All the observations were supported by our histological findings. Thus, we can conclude that, AA could be used as an effective chemopreventive agent against DMH-induced colon carcinogenesis.

Study Type : Animal Study

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Sayer Ji
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