School of Chinese Medicine
Tuberculosis (TB) is a highly contagious disease mainly caused by Mycobacterium tuberculosis H37RV. Antitubercular (anti-TB) bioassay-guided isolation of the CHCl3 extract of the leaves and stems of the medicinal plant Ardisia gigantifolia led to the isolation of two anti-TB 5-alkylresorcinols, 5-(8Z-heptadecenyl) resorcinol (1) and 5-(8Z-pentadecenyl) resorcinol (2). We further synthesized 15 derivatives based on these two natural products. These compounds (natural and synthetic) were evaluated for their anti-TB activity against Mycobacterium tuberculosis H37RV. Resorcinols 1 and 2 exhibited anti-TB activity with MIC values at 34.4 and 79.2 μm in MABA assay, respectively, and 91.7 and 168.3 μm in LORA assay, respectively. Among these derivatives, compound 8 was found to show improved anti-TB activity than its synthetic precursor (2) with MIC values at 42.0 μm in MABA assay and 100.2 μm in LORA assay. The active compounds should be regarded as new hits for further study as a novel class of anti-TB agents. The distinct structure–activity correlations of the parent compound were elucidated based on these derivatives.
Ardisia gigantifolia, isolation and structure identification, resorcinols, anti-TB activity, Mycobacterium tuberculosis H37RV, structural modification
Source Publication Title
Chemical Biology and Drug Design
© 2016 John Wiley & Sons A/S.
Funded by Hong Kong Baptist University (HKBU) Interdisciplinary Research Matching Scheme, grant Number: RC-IRMS/12-13/03;Natural Science Foundation of China, grant Number: 21402166; NIH, grant Numbers: 3U01TW001015-10S1, 2U01TW001015-11A1; Foreign Agricultural Service of the USDA, grant Numbers: CXZZ20150601110000604;, ZDSYS201506031617582; Shenzhen strategic emerging industry development project
Link to Publisher's Edition
Guan, Yi-Fu, Xun Song, Ming-Hua Qiu, Shi-Hong Luo, Bao-Jie Wang, Nguyen Van Hung, Nguyen M. Cuong, Djaja Doel Soejarto, Harry H. S. Fong, Scott G. Franzblau, Sheng-Hong Li, Zhen-Dan He, and Hong-Jie Zhang. "Bioassay-guided isolation and structural modification of the anti-TB resorcinols from Ardisia gigantifolia." Chemical Biology and Drug Design 88.2 (2016): 293-301.