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Effect of Senecio serratuloides and its bioactive compound on hypertension
1 , 2 , 3 , 4 , * 1
1  Department of Human Biology, Faculty of Health Sciences, Walter Sisulu University, Mthatha 5117, South Africa
2  Department of Applied Chemistry, Faculty of Science, University of Johannesburg, South Africa
3  Department of Biological Sciences, Faculty of Natural Sciences, Walter Sisulu University, Mthatha 5117, South Africa
4  Department of Chemistry, Faculty of Science and Agriculture, University of Fort Hare, PBX1314 Alice, 5700 Eastern Cape Province, South Africa

Published: 31 October 2018 by MDPI in 4th International Electronic Conference on Medicinal Chemistry session ECMC-4

Ethnopharmacological knowledge provides useful information for experimental pharmacological studies. Based on this knowledge, this study was aimed at isolating the bioactive compound in Senecio serratuloides which is used in treating hypertension in Eastern Cape Province of South Africa. Senecio serratuloides was serially extracted using hexane, dichloromethane, ethyl acetate and methanol. The fractions were tested for their phytochemical constituents, antioxidant capacity and antihypertensive properties. Methanol fraction was subjected to thin layer and column chromatography for isolation of bioactive compound whose acute antihypertensive effects was determined. Ethyl acetate and methanol fractions had more phytochemicals, better antioxidant capacity and significantly (p<0.001) prevented increase in systolic and diastolic blood pressure. The bioactive compound (Estran-3-one, 17-(acetyloxy)-2-methyl-, (2à,5à,17á)-) isolated from the methanol fraction significantly prevented increase in blood pressure from the first to the fourth hour after treatment. Senecio serratuloides is a potential source of lead compounds for treating hypertension.

Keywords: Senecio serratuloides; Hypertension; Bioactive compound