Drugs & Aging

, Volume 7, Issue 1, pp 19–29

P-Glycoprotein Expression and Regulation

Age-Related Changes and Potential Effects on Drug Therapy
  • Sudhir Gupta
Review Article Clinical Pharmacology

DOI: 10.2165/00002512-199507010-00003

Cite this article as:
Gupta, S. Drugs & Aging (1995) 7: 19. doi:10.2165/00002512-199507010-00003


P-Glycoprotein is a member of a superfamily of adenosine triphosphate-binding cassette transporter proteins and plays an important role in multidrug resistance in cancer cells. P-Glycoprotein is known to transport a wide variety of substances ranging from ions to peptides. P-Glycoprotein is expressed on a variety of normal cells, however its physiological function is unclear. The apical and polar distribution on secretory cells suggests a secretory role for P-glycoprotein. More recently, cells of the immune system have been shown to express P-glycoprotein. There is evidence to suggest that P-glycoprotein may play a role in the secretion of certain cytokines (especially those lacking signal sequence) and cytotoxic molecules. In this article, the basic structure, gene regulation and expression of P-glycoprotein are reviewed. Furthermore, age-related changes in the expression of P-glycoprotein and potential effects on drug therapy in the elderly are discussed.

Copyright information

© Adis International Limited 1995

Authors and Affiliations

  • Sudhir Gupta
    • 1
  1. 1.Division of Basic and Clinical ImmunologyUniversity of CaliforniaIrvineUSA
  2. 2.Medical Sciences I, C-240University of CaliforniaIrvineUSA