Anti-tuberculosis activity of quassinoids

Area of Science:

• Natural Products Chemistry
• Medicinal Chemistry
• Pharmacology

Background:

• Tuberculosis remains a significant global health challenge, necessitating novel therapeutic agents.
• Quassinoids, a class of natural compounds, have demonstrated diverse biological activities.
• Simaroubaceous plants are a rich source of quassinoids with potential medicinal properties.

Purpose of the Study:

• To evaluate the in vitro anti-tuberculosis activity of fifty-six quassinoids.
• To identify potent anti-tuberculosis compounds from selected Simaroubaceous plants.
• To investigate the structure-activity relationships of these quassinoids against Mycobacterium tuberculosis.

Main Methods:

• Isolation of fifty-six quassinoids from four Simaroubaceous plants: Ailanthus altissima, Brucea antidysenterica, Picrasma ailanthoides, and Brucea javanica.
• In vitro anti-tuberculosis activity screening of the isolated compounds.
• Analysis of structure-activity relationships based on the observed activity data.

Main Results:

• Four quassinoids, shinjulactone K (1), ailanthone (2), shinjudilactone (3), and dehydrobruceantin (4), exhibited the most potent anti-tuberculosis activity among the tested compounds.
• The observed anti-tuberculosis activities ranged from 0% to 19%.
• The study provided insights into the relationship between the chemical structures of quassinoids and their anti-tuberculosis efficacy.

Conclusions:

• Quassinoids isolated from Simaroubaceous plants possess anti-tuberculosis activity.
• Shinjulactone K, ailanthone, shinjudilactone, and dehydrobruceantin are promising lead compounds for further anti-tuberculosis drug development.
• Structure-activity relationship data can guide the design of more potent anti-tuberculosis quassinoid derivatives.