Chemopreventive activity of hydroethanolic Murraya koenigii leaves extract (HEMKLE) against chemically induced skin carcinogenesis in mice
Abstract
Abstract. The present study aimed to examine the chemoprotective effect of Hydroethanolic Murraya koenigii leaves extract (HEMKLE) on murine skin carcinogenesis model. For the study, male LACA mice divided into four groups (n = 15 per group). Group I (Control), Group II (DMBA/TPA), Group III (HEMKLE), and Group IV (HEMKLE + DMBA/TPA). Skin tumors were induced in Group II (DMBA/TPA) and Group IV (HEMKLE + DMBA/TPA) by topical application of 7, 12 dimethylbenz[a]anthracene (DMBA) [500 nmol/100 μL of acetone, twice a week for two weeks] and 12-O-tetradecanoyl phorbol-13-acetate (TPA) [1.7 nmol/100 μL of acetone, twice a week for eighteen weeks] and HEMKLE (200 mg/kg b. w.) was administered orally (instilled by oral gavage). The chemoprotective response of HEMKLE was evident by inhibition in tumor incidence, mean tumor volume, mean tumor burden, total number of tumors, and tumor size in Group IV (HEMKLE + DMBA/TPA) when compared to Group II (DMBA/TPA). HEMKLE administration also decreased the reactive oxygen species (ROS) and lipid peroxidation (LPO) levels and increased the antioxidants enzyme activities in Group IV (HEMKLE + DMBA/TPA) when compared to Group II (DMBA/TPA) that suggests its antioxidant potential. HEMKLE administration also increased the mRNA and protein expression of caspase-9 and caspase-3 and decreased the mRNA and protein expression of Bcl-2 in Group IV (HEMKLE + DMBA/TPA) when compared to Group II (DMBA/TPA) that suggest its apoptosis-inducing effect on DMBA/TPA induced skin carcinogenesis.
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