Biologic propensities and phytochemical profile of Vangueria madagascariensis J. F. Gmelin (Rubiaceae): an underutilized native medicinal food plant from Africa.

Biomed Res Int 2014 10;2014:681073. Epub 2014 Apr 10.

Department of Health Sciences, Faculty of Science, University of Mauritius, 230 Réduit, Mauritius.

Vangueria madagascariensis (VM), consumed for its sweet-sour fruits, is used as a biomedicine for the management of diabetes and bacterial infections in Africa. The study aims to assess the potential of VM on α -amylase, α -glucosidase, glucose movement, and antimicrobial activity. The antioxidant properties were determined by measuring the FRAP, iron chelating activity, and abilities to scavenge DPPH, HOCl, (∙) OH, and NO radicals. Leaf decoction, leaf methanol, and unripe fruit methanol extracts were observed to significantly inhibit α -amylase. Active extracts against α -glucosidase were unripe fruit methanol, unripe fruit decoction, leaf decoction, and ripe fruit methanol, which were significantly lower than acarbose. Kinetic studies revealed a mixed noncompetitive type of inhibition. Leaf methanolic extract was active against S. aureus and E. coli. Total phenolic content showed a strong significant positive correlation (r = 0.88) with FRAP. Methanolic leaf extract showed a more efficient NO scavenging potential and was significantly lower than ascorbic acid. Concerning (∙) OH-mediated DNA degradation, only the methanol extracts of leaf, unripe fruit, and ripe fruit had IC50 values which were significantly lower than α -tocopherol. Given the dearth of information on the biologic propensities of VM, this study has established valuable primary information which has opened new perspectives for further pharmacological research.

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http://dx.doi.org/10.1155/2014/681073DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4000929PMC
December 2014
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