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Updated: Jun 4, 2025

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
06:09

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells

Published on: June 7, 2019

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TPC2 controls MITF expression and metastasis in melanoma

M Raza Zaidi1, Jonathan Soboloff1

  • 1Fels Cancer Institute for Personalized Medicine, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, 19140, USA; Department of Cancer & Cellular Biology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, 19140, USA.

Cell Calcium
|December 31, 2024
PubMed

Insights

Melanoma progression relies on Two Pore Channel 2 (TPC2) and Rab7a, regulated by the MITF gene. Wnt signaling mediates this, impacting cancer cell growth and spread.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Melanoma is a significant skin cancer with complex regulatory pathways.
  • Melanocyte inducing transcription factor (MITF) is crucial for melanocyte and melanoma cell functions.
  • Two Pore Channel 2 (TPC2) is an ion channel implicated in various cellular processes.

Purpose of the Study:

  • To investigate the role of TPC2 and Rab7a in MITF-high melanoma proliferation, invasion, and metastasis.
  • To elucidate the signaling pathways mediating the effects of TPC2 and Rab7a in melanoma.
  • To understand the interplay between ion channels, lysosomal activity, and melanoma oncogenesis.

Main Methods:

  • Analysis of MITF-high melanoma models.
  • Investigation of Rab7a and TPC2 dependencies.
  • Exploration of Wnt signaling pathway involvement.
  • Assessment of lysosomal and melanosomal activity.
  • Evaluation of GSK-3β stability and β-catenin regulation.

Main Results:

  • MITF-high melanoma proliferation, invasion, and metastasis are dependent on both Rab7a and TPC2.
  • Wnt signaling acts as a mediator, with Rab7a inducing TPC2 activity.
  • TPC2 activity influences GSK-3β stability, affecting β-catenin degradation and MITF gene transcription.

Conclusions:

  • TPC2 and Rab7a are essential for the progression of MITF-high melanoma.
  • The Wnt/Rab7a/TPC2 axis regulates key oncogenic pathways in melanoma.
  • Targeting ion channel function presents a potential therapeutic strategy for melanoma.
Keywords:
LysosomeMITFMelanomaTPCWnt

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