Antimycobacterial agents from selected Mexican medicinal plants

Area of Science:

• Ethnobotany
• Natural Product Chemistry
• Microbiology

Background:

• Traditional medicine often utilizes plants for treating infections.
• Mexican dryland biodiversity is a rich source of bioactive compounds.
• Antimycobacterial drug discovery is crucial for combating tuberculosis.

Purpose of the Study:

• To investigate the antimycobacterial potential of compounds from selected Mexican medicinal plants.
• To isolate and identify bioactive secondary metabolites.
• To validate the traditional use of these plants in treating tuberculosis.

Main Methods:

• Bioassay-guided fractionation of plant extracts.
• Isolation and structural elucidation of compounds using spectral data.
• Determination of minimum inhibitory concentration (MIC) values against Mycobacterium tuberculosis.

Main Results:

• Several compounds were isolated from Rumex hymenosepalus, Larrea divaricata, Phoradendron robinsonii, and Amphipteryngium adstringens.
• Stilbenoids, flavan-3-ols, anthraquinones, flavonols, nordihydroguaiaretic acid, sakuranetin, triterpenoids, and a novel naphthoic acid derivative were identified.
• Glycolipids, sesquiterpenoids, and triterpenoids exhibited the most significant antimycobacterial activity (MICs 16-128 µg/mL).
• The antimycobacterial activity of glycolipids was reported for the first time.

Conclusions:

• The isolated compounds, particularly glycolipids, sesquiterpenoids, and triterpenoids, demonstrate antimycobacterial potential.
• This study provides a scientific basis for the traditional use of these Mexican plants in tuberculosis treatment.
• Further research into these natural products could lead to novel anti-tuberculosis agents.