Dietary regulation of P-gp function and expression.

Area of Science:

• Pharmacology
• Nutritional Science
• Drug Metabolism

Background:

• Food-drug interactions can significantly alter drug efficacy and safety.
• P-glycoprotein (P-gp) is a key transporter protein influencing drug absorption and bioavailability.
• Dietary components are increasingly recognized for their potential to modulate P-gp activity.

Purpose of the Study:

• To review the regulation of P-glycoprotein (P-gp) by various dietary components.
• To correlate changes in P-gp function and expression with drug bioavailability.
• To identify knowledge gaps in understanding food-drug interactions mediated by P-gp.

Main Methods:

• Literature review of published studies on dietary components and P-gp.
• Analysis of in vitro and in vivo data on P-gp modulation by foods.
• Correlation of P-gp changes with drug bioavailability alterations.

Main Results:

• Extensive data support P-gp modulation by fruit juices, spices, herbs, cruciferous vegetables, and green tea.
• Most findings are from in vitro models, with limited clinical significance established for many interactions.
• Piperine and capsaicin show poor in vivo/in vitro correlation; curcumin highlights acute vs. chronic consumption effects.

Conclusions:

• Dietary components can modulate drug bioavailability via P-gp regulation.
• Clinical significance of many reported food-P-gp interactions remains unclear.
• Further research on the pharmacokinetic and pharmacodynamic profiles of dietary components is needed.