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The dual role of the TSC complex in cancer

Josephine Hartung1, Christine Müller1, Cornelis F Calkhoven1

  • 1European Research Institute for the Biology of Ageing (ERIBA), University Medical Center Groningen, University of Groningen, 9700 AD Groningen, The Netherlands.

Trends in Molecular Medicine
|November 2, 2024
PubMed

Insights

The tuberous sclerosis complex (TSC) proteins regulate cell growth by inhibiting mTORC1. While often tumor suppressive, TSC proteins can promote certain cancers, necessitating new therapeutic strategies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Tuberous sclerosis complex (TSC) proteins (TSC1/TSC2/TBC1D7) are key inhibitors of mechanistic target of rapamycin complex 1 (mTORC1), a critical regulator of cell growth.
  • Mutations in TSC1 or TSC2 lead to TSC, a genetic disorder causing benign tumors in multiple organs.
  • Traditionally viewed as tumor suppressors, TSC proteins exhibit dual roles in cancer, sometimes promoting tumorigenesis.

Purpose of the Study:

  • To review the composition and function of the TSC protein complex.
  • To elucidate the roles of individual TSC components in cancer biology.
  • To explore potential therapeutic targeting strategies for TSC-related cancers.

Main Methods:

  • Literature review of existing studies on TSC protein complex.
  • Analysis of the roles of TSC1, TSC2, and TBC1D7 in various cancer types.
  • Identification of potential therapeutic targets based on TSC protein functions.

Main Results:

  • The TSC complex's primary function is mTORC1 inhibition, impacting cell growth and proliferation.
  • Evidence suggests TSC proteins can act as oncogenes in specific cancer contexts, contradicting their tumor-suppressive roles.
  • Understanding the dual role of TSC proteins is crucial for developing effective cancer therapies.

Conclusions:

  • The TSC complex plays a complex role in cancer, acting as both a tumor suppressor and promoter.
  • Further research into the context-dependent functions of TSC proteins is essential.
  • Targeting the TSC pathway offers potential for novel cancer treatment strategies.
Keywords:
MYCTSCcancermTORC1molecular glue degraders

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