Anti-Mycobacterium tuberculosis activity of essential oil and 6,7-dehydroroyleanone isolated from leaves of Tetradenia riparia (Hochst.) Codd (Lamiaceae)

Phytomedicine : International Journal of Phytotherapy and Phytopharmacology
Vanessa Pietrowski BaldinRosilene Fressatti Cardoso

Abstract

The global resurgence of tuberculosis (TB) and the development of drug resistance, as multidrug-resistant (MDR) and extensively drug-resistant (XDR) Mycobacterium tuberculosis isolates, are a threat to TB control and have created a need for new and more effective anti-TB drugs. The current study evaluated the in vitro cytotoxicity and activity of Tetradenia riparia essential oil (TrEO) and 6,7-dehydroroyleanone pure compound against M. tuberculosis H37Rv and susceptible and resistant clinical isolates. The in vitro activities of TrEO and 6,7-dehydroroyleanone were determined by Resazurin Microtiter Assay Plate (REMA). The cytotoxicity was evaluated in murine peritoneal macrophages by Alamar Blue assay. The cytotoxic effects were expressed as median concentration cytotoxicity (CC50) and the selectivity index (SI) was calculated. TrEO and 6,7-dehydroroyleanone showed activity against M. tuberculosis H37Rv with minimum inhibitory concentration (MIC) 62.5 µg/ml and 31.2 µg/ml, respectively. Both of them exhibited activities against resistant and susceptible M. tuberculosis clinical isolates with MIC values between 31.2 and 62.5 µg/ml. Cytotoxicity assays showed SI 1.9 and 7.9 for TrEO and 6,7-dehydroroyleanone, respectively. These ...Continue Reading

Citations

Dec 6, 2020·Journal of Ethnopharmacology·Isa Anina Lambrechts, Namrita Lall
Mar 19, 2020·Anti-cancer Agents in Medicinal Chemistry·Jana WiemannRené Csuk
Jul 3, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ryan D Rattray, Ben-Erik Van Wyk
Aug 28, 2021·Natural Product Research·Irina E SmirnovaOxana B Kazakova

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