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GALNT14 Involves the Regulation of Multidrug Resistance in Breast Cancer Cells

Jinshuai Shan1, Yang Liu1, Yukun Wang1

  • 1College of Life Sciences, Hebei University, Baoding 071002, Hebei, P.R. China.

Translational Oncology
|April 28, 2018
PubMed

Insights

This study shows that GALNT14 enzyme promotes multidrug resistance (MDR) in breast cancer by increasing P-glycoprotein (P-gp) stability. Lowering GALNT14 levels can sensitize breast cancer cells to chemotherapy drugs like Adriamycin.

Area of Science:

  • Oncology
  • Biochemistry
  • Molecular Biology

Background:

  • The N-acetylgalactosaminyltransferase enzyme family plays a role in cellular processes.
  • Multidrug resistance (MDR) is a significant challenge in breast cancer treatment.
  • The specific role of GALNT14 in MDR is not well understood.

Purpose of the Study:

  • To investigate the role of GALNT14 in regulating multidrug resistance (MDR) in breast cancer.
  • To elucidate the molecular mechanism by which GALNT14 influences drug resistance.
  • To determine the association between GALNT14 expression and P-glycoprotein (P-gp) in breast cancer.

Main Methods:

  • Utilized MCF-7 breast cancer cell lines with varying GALNT14 expression levels (overexpression and knockdown).
  • Assessed cellular response to Adriamycin treatment.
  • Examined the expression levels of GALNT14 and P-gp.
  • Investigated the effect of GALNT14 on P-gp stability.
  • Analyzed patient tissues for correlations between GALNT14 and P-gp.

Main Results:

  • GALNT14 expression is positively correlated with Adriamycin resistance in MCF-7 cells.
  • Knockdown of GALNT14 resensitizes breast cancer cells to Adriamycin.
  • GALNT14 expression is associated with increased P-gp expression and stability.
  • Higher GALNT14 and P-gp levels were observed in chemotherapy-resistant human breast cancer tissues.

Conclusions:

  • GALNT14 is a key regulator of multidrug resistance in breast cancer.
  • GALNT14 promotes MDR by enhancing the stability of the P-gp efflux pump.
  • Targeting GALNT14 may represent a novel therapeutic strategy to overcome chemotherapy resistance in breast cancer.

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