Anti-Mycobacterium tuberculosis activity and cytotoxicity of Calophyllum brasiliense Cambess (Clusiaceae).

Abstract

We evaluated the in vitro anti-Mycobacterium tuberculosis activity and the cytotoxicity of dichloromethane extract and pure compounds from the leaves of Calophyllum brasiliense. Purification of the dichloromethane extract yielded the pure compounds (-) mammea A/BB (1), (-) mammea B/BB (2) and amentoflavone (3). The compound structures were elucidated on the basis of spectroscopic and spectrometric data. The contents of bioactive compounds in the extracts were quantified using high performance liquid chromatography coupled to an ultraviolet detector. The anti-M. tuberculosis activity of the extracts and the pure compounds was evaluated using a resazurin microtitre assay plate. The cytotoxicity assay was performed in J774G.8 macrophages using the 3-(4,5-dimethyl thiazol-2-yl)-2,5-diphenyl tetrazolium bromide colourimetric method. The quantification of the dichloromethane extract showed (1) and (2) at concentrations of 31.86 ± 2.6 and 8.24 ± 1.1 µg/mg of extract, respectively. The dichloromethane and aqueous extracts showed anti-M. tuberculosis H37Rv activity of 62.5 and 125 µg/mL, respectively. Coumarins (1) and (2) showed minimal inhibitory concentration ranges of 31.2 and 62.5 µg/mL against M. tuberculosis H37Rv and clinical isolates. Compound (3) showed no activity against M. tuberculosis H37Rv. The selectivity index ranged from 0.59-1.06. We report the activity of the extracts and coumarins from the leaves of C. brasiliense against M. tuberculosis.

• Authors: Claudia Terencio Agostinho Pires, Mislaine Adriana Brenzan, Regiane Bertin de Lima Scodro, Diógenes Aparício Garcia Cortez, Luciana Dias Ghiraldi Lopes, Vera Lucia Dias Siqueira, Rosilene Fressatti Cardoso
• Journal: Memorias do Instituto Oswaldo Cruz (Mem Inst Oswaldo Cruz) Vol. 109 Issue 3 Pg. 324-9 (Jun 2014) ISSN: 1678-8060 [Electronic] Brazil
• PMID: 24676652 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Anti-Bacterial Agents
• Biflavonoids
• Plant Extracts
• Methylene Chloride
• amentoflavone

Topics

• Anti-Bacterial Agents (pharmacology, toxicity)
• Biflavonoids (isolation & purification, pharmacology, toxicity)
• Calophyllum (chemistry)
• Macrophages (drug effects)
• Methylene Chloride (isolation & purification, pharmacology, toxicity)
• Microbial Sensitivity Tests
• Mycobacterium tuberculosis (drug effects)
• Plant Extracts (pharmacology, toxicity)