What is the main MOA for MOST anti fungal medications?

What is the main MOA for MOST anti fungal medications?

• A. Inhibit ergosterol synthesis
• B. Inhibit cell wall synthesis
• C. Inhibit nucleic acid synthesis
• D. Inhibit sphingolipid synthesis

Answer: (A)

Fungi rely on ergosterol in their cell membranes, a component not found in human cells, so many antifungals are designed to disrupt ergosterol-related processes. The most common approach is to inhibit ergosterol synthesis. Drugs in this category, such as azoles, block the enzyme lanosterol 14-α-demethylase, preventing conversion of lanosterol into ergosterol. Without proper ergosterol, the fungal membrane becomes dysfunctional, permeability increases, and fungal growth is hindered. While other antifungals act by binding existing ergosterol to form pores or by targeting different targets like the fungal cell wall or nucleic acids, the widespread and clinically dominant strategy is blocking ergosterol production, making this mechanism the best summary of how most antifungals work.

Fungi rely on ergosterol in their cell membranes, a component not found in human cells, so many antifungals are designed to disrupt ergosterol-related processes. The most common approach is to inhibit ergosterol synthesis. Drugs in this category, such as azoles, block the enzyme lanosterol 14-α-demethylase, preventing conversion of lanosterol into ergosterol. Without proper ergosterol, the fungal membrane becomes dysfunctional, permeability increases, and fungal growth is hindered. While other antifungals act by binding existing ergosterol to form pores or by targeting different targets like the fungal cell wall or nucleic acids, the widespread and clinically dominant strategy is blocking ergosterol production, making this mechanism the best summary of how most antifungals work.