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Articles by H.M. Khairi
Total Records ( 2 ) for H.M. Khairi
  Z.A. Zakaria , H.M. Khairi , M.N. Somchit , M.R. Sulaiman , A.M. Mat Jais , I. Reezal , N.N. Mat Zaid , S.N.Z. Abdul Wahab , N.S. Fadzil , M. Abdullah and C.A. Fatimah
  To determine on the antibacterial activity of the leaves and acute toxicity level of the leaves, tender leaves and rhizomes of Manihot esculenta var. Sri Pontian extracts. The chloroform (CME1) and ethanol (EME1) leaves extracts of M. esculenta (25, 50 and 100% concentrations) were tested against a selected groups of Gram positive and Gram negative bacteria using the disc diffusion method. On the other hand, the chloroform and ethanol leaves (CME2 and EME2), as well as the tender young leaves (CME3 and EME3) and rhizomes (CME4 and EME4), extracts of M. esculenta, (concentration ranging from 200 to 2600 ppm) were tested for their chronic toxicity level using the brine shrimp bioassay. CME1 was found to give positive antibacterial activity against L. monocytogenes, Vibrio cholerae, Shigella flexneri and Salmonella typhi while EME1 was effective against P. aeroginosa, C. diphtheria and V. cholerae. The results also showed that among the chloroform extracts, CME4 (LC50) = 413.9±51.6) possessed significantly (p<0.05) high toxicity followed by CME3 (LC50 = 496.2±33.1) and CME2 (LC50 = 532.9±22.9) while among the ethanol extracts, EME3 (LC50 = 344.7±33.9) was significantly (p<0.05) more toxic followed by EME2 (LC50 = 534.3±81.5) and EME4 (LC50 = 609.6±74.8). Overall, EME3 and CME4 were highly toxic than their counterpart (CME3 and EME4), respectively, while CME2 and EME2 did no show any discrepancy in their LD50 value. M. esculenta possess an antibacterial property and low toxicity level.
  M.N. Somchit , S. Faizah , A. Zuraini , H.M. Khairi , A.H. Hasiah and Z.A. Zakaria
  Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) are heterogenous group of compounds used to cure and prevent inflammation. It was demonstrated that NSAIDs has the ability to inhibit the viability of colon cancer cells in vitro. We investigated the effects of Piroxicam and mefenamic acid on the viability of 4 cancer cell lines in which 2 of them are colon cancer cell lines (HCT 116 and CaCo-2). Cell viability was determined using MTT assay. Both NSAIDs was observed to markedly decrease the cell viability of both cell lines (HCT 116 and CaCo-2). Piroxicam was statistically more cytotoxic towards the cancer cell lines when compared to mefenamic acid. However, the cytotoxic effect of NSAIDs was less potent on breast cancer cells (MCF-7) and liver cancer cells (Hep G2). In conclusion, piroxicam and mefenamic acid showed selective cytotoxic effects against colon cancer cells but not against liver or breast cancer cells.
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