Fragment-based approach to study fungicide-biomimetic membrane interactions.

Area of Science:

• Biochemistry
• Pharmacology
• Materials Science

Background:

• Understanding drug-membrane interactions is crucial for developing effective antifungal agents.
• Butenafine, an allylamine-type fungicide, requires interaction with cell membranes for its activity.
• Liposomes serve as model systems to study drug interactions with biological membranes.

Purpose of the Study:

• To elucidate the molecular interactions between butenafine and liposomes.
• To identify structural factors governing drug affinity and membrane perturbation.
• To explore fragment-based approaches for antifungal drug design.

Main Methods:

• Utilized an interdisciplinary approach combining micro differential scanning calorimetry, open-tubular capillary electrochromatography, nanoplasmonic sensing, and quartz crystal microbalance.
• Investigated drug/fragment-liposome interactions by varying liposome lipid composition and compound incubation methods.
• Analyzed the influence of lipid head group ionization and cholesterol content on drug-membrane interactions.

Main Results:

• Demonstrated that the nature and ionization of lipid polar head groups significantly impact drug-membrane interactions.
• Showed that the presence and concentration of cholesterol in liposomes modulate the interaction dynamics.
• Obtained a detailed mechanistic understanding of butenafine's interaction with lipid bilayers.

Conclusions:

• The study provides in-depth insights into drug-membrane interactions crucial for antifungal drug development.
• The fragment-based approach can guide the design of novel antifungal candidates with enhanced membrane penetration.
• Findings contribute to the discovery of agents with improved characteristics for interacting with biological membranes.