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Updated: Sep 28, 2025

The Colon-26 Carcinoma Tumor-bearing Mouse as a Model for the Study of Cancer Cachexia
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The Colon-26 Carcinoma Tumor-bearing Mouse as a Model for the Study of Cancer Cachexia

Published on: November 30, 2016

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GDF-15 in tumor-derived exosomes promotes muscle atrophy via Bcl-2/caspase-3 pathway

Wanli Zhang1, Weikuan Sun1, Xiaofan Gu1

  • 1Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China.

Cell Death Discovery
|April 5, 2022
PubMed

Insights

Growth differentiation factor 15 (GDF-15) in tumor exosomes promotes cancer cachexia by inducing muscle atrophy. Targeting GDF-15 may offer a therapeutic strategy for this debilitating condition.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Cancer cachexia is a complex syndrome causing significant muscle loss.
  • Tumor-derived exosomes are implicated in cancer cachexia pathogenesis.
  • Previous research identified microRNAs in exosomes contributing to muscle atrophy.

Purpose of the Study:

  • To investigate the role of proteins within tumor-derived exosomes in cancer cachexia.
  • To identify specific exosomal proteins that induce muscle atrophy.

Main Methods:

  • Comparative proteomic analysis of exosomes from cachectic (C26) and non-cachectic (MC38) tumor cells.
  • Western blotting to validate protein expression levels.
  • In vitro studies using C2C12 myotubes to assess GDF-15's direct effects.
  • In vivo studies in tumor-bearing mice.
  • Genetic manipulation (overexpression and knockdown) of GDF-15 in cancer cells.

Main Results:

  • Growth differentiation factor 15 (GDF-15) was significantly elevated in exosomes from cachectic C26 tumor cells compared to non-cachectic MC38 cells.
  • GDF-15 directly induced muscle atrophy in cultured myotubes by modulating Bcl-2/caspase-3 pathways.
  • Overexpression of GDF-15 enhanced the muscle-atrophying potential of tumor-derived factors, while its knockdown reduced this potential.
  • GDF-15 was also found in tumor tissues, serum exosomes, and muscle tissues of tumor-bearing mice.

Conclusions:

  • GDF-15, present in tumor-derived exosomes, plays a crucial role in inducing muscle atrophy associated with cancer cachexia.
  • GDF-15 represents a potential therapeutic target for managing cancer cachexia.

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