Targeting mycobacterial membranes and membrane proteins: Progress and limitations

Area of Science:

• Microbiology
• Medicinal Chemistry
• Drug Discovery

Background:

• Tuberculosis remains a major global health challenge, primarily caused by Mycobacterium tuberculosis.
• Mycobacterium tuberculosis exhibits significant resistance to antibiotics due to its complex cell membrane.
• Altering membrane composition is a key survival mechanism for bacteria, enabling evasion of drugs and host defenses.

Purpose of the Study:

• To review the therapeutic potential of targeting the mycobacterial membrane for novel anti-tuberculosis drug development.
• To highlight strategies for directly and indirectly targeting membrane structure and function.
• To discuss chemical scaffolds, mechanisms of action, and limitations of membrane-centric inhibitors.

Main Methods:

• Review of scientific literature on mycobacterial membrane targeting strategies.
• Analysis of direct and indirect membrane targeting agents.
• Chronological evaluation of chemical scaffolds, their clinical progress, and mechanisms of action.

Main Results:

• Direct membrane targeting disrupts membrane potential and causes cytoplasmic leakage.
• Indirect targeting inhibits essential membrane-associated proteins involved in cell wall synthesis or energy production.
• Various drug sources, including target-based, phenotypic screening, repurposed drugs, and natural products, have yielded anti-TB agents.

Conclusions:

• Targeting the mycobacterial membrane is a viable therapeutic strategy with potential for developing effective and less toxic anti-tuberculosis drugs.
• Further exploration of novel membrane targets and chemical spaces is crucial for combating drug-resistant tuberculosis.
• Membrane-centric approaches can potentially overcome existing resistance mechanisms and offer new treatment avenues.