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Updated: Mar 26, 2026

Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence
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Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence

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The influence of a caveolin-1 mutant on the function of P-glycoprotein

Chih-Yuan Lee1,2, Ting-Yu Lai2, Meng-Kun Tsai1

  • 1Department of Surgery, No. 7 Chung San South Road, Taipei 10002, Taiwan.

Scientific Reports
|February 5, 2016
PubMed

Insights

A specific mutation in Caveolin-1 (CAV1) protein disrupts cancer cell drug resistance mechanisms. This finding offers new insights into overcoming multidrug resistance in cancer therapy.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Genetic heterogeneity drives cancer drug resistance.
  • Drug transporters and caveolae influence intracellular drug concentration.
  • Caveolin-1 (CAV1) is linked to multidrug resistance in cancer.

Purpose of the Study:

  • Investigate the role of CAV1 ubiquitination at lysine 176.
  • Determine the impact of a specific CAV1 mutation (K176R) on cancer cell drug resistance.

Main Methods:

  • Systematic study of the ubiquitin-modified proteome.
  • Site-directed mutagenesis to create CAV1 K176R mutant.
  • Functional assays in non-small-cell lung cancer cell lines.

Main Results:

  • The CAV1 K176R mutation impairs caveolae biogenesis.
  • This mutation disrupts the interaction between CAV1 and P-glycoprotein.
  • K176R mutant CAV1 enhances P-glycoprotein activity, reducing anti-cancer drug efficacy.

Conclusions:

  • CAV1's lysine 176 is a critical site for regulating drug resistance.
  • Targeting CAV1 modification could be a strategy to overcome multidrug resistance.
  • The K176R mutation highlights a mechanism of acquired drug resistance in cancer.

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