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Chemically-blocked Antibody Microarray for Multiplexed High-throughput Profiling of Specific Protein Glycosylation in Complex Samples
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[Advances in the study of expression and regulation of P-glycoprotein]

Cheng-Jun Shi1, Li-Wu Fu

  • 1State Key Laboratory of Oncology in Southern China, Cancer Center, Sun Yat-Sen University, Guangzhou 510060, China.

Yao Xue Xue Bao = Acta Pharmaceutica Sinica
|December 7, 2007
PubMed

Insights

Drug resistance in cancer chemotherapy is often caused by P-glycoprotein (P-gp) over-expression. Understanding P-gp regulation offers new therapeutic targets to overcome multidrug resistance (MDR) and improve cancer treatment outcomes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Cancer chemotherapy faces a significant hurdle in drug resistance.
  • Over-expression of P-glycoprotein (P-gp), encoded by the MDR1 gene, is a primary mechanism for this resistance.
  • P-gp acts as an efflux pump, reducing the intracellular concentration of various anticancer drugs.

Purpose of the Study:

  • To summarize recent research on the expression and regulation of P-glycoprotein.
  • To identify potential therapeutic targets for overcoming multidrug resistance (MDR).

Main Methods:

  • Review of studies on P-glycoprotein expression.
  • Analysis of regulatory mechanisms influencing P-glycoprotein levels.

Main Results:

  • P-glycoprotein over-expression is a key factor in multidrug resistance.
  • Several factors, including transcription factors, epigenetic modifications (DNA methylation, histone acetylation/deacetylation), post-translational modifications (phosphorylation, glycosylation), and MDR1 gene polymorphisms, regulate P-gp expression.

Conclusions:

  • P-glycoprotein plays a critical role in anticancer drug resistance.
  • The regulatory mechanisms of P-glycoprotein present promising new targets for therapeutic intervention to enhance chemotherapy efficacy.

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