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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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Perturbed BMP signaling and denervation promote muscle wasting in cancer cachexia

Roberta Sartori1,2,3, Adam Hagg1,4,5, Sandra Zampieri3,6,7

  • 1Baker Heart and Diabetes Institute, Melbourne, VIC 3004, Australia.

Science Translational Medicine
|August 5, 2021
PubMed

Insights

Cancer cachexia causes muscle loss by reducing bone morphogenetic protein (BMP) signaling. Restoring BMP signaling in muscles can prevent muscle wasting and preserve neuromuscular junction function in cancer patients.

Area of Science:

  • Biomedical Science
  • Oncology
  • Neuroscience

Background:

  • Cancer cachexia is a common, debilitating syndrome in advanced cancer patients, characterized by significant skeletal muscle mass and strength loss.
  • The precise mechanisms driving cancer cachexia remain incompletely understood, hindering the development of effective treatments.
  • Early identification of molecular pathways involved in muscle wasting is crucial for therapeutic intervention.

Purpose of the Study:

  • To investigate the role of bone morphogenetic protein (BMP) signaling in the pathogenesis of cancer cachexia.
  • To identify the molecular triggers and downstream effects of BMP signaling disruption in cancer-associated muscle wasting.
  • To evaluate the therapeutic potential of restoring BMP signaling to counteract muscle loss in cancer.

Main Methods:

  • Utilized mouse models of cancer cachexia and analyzed muscle tissue from cancer patients.
  • Measured bone morphogenetic protein (BMP) signaling levels and expression of BMP inhibitors like Noggin.
  • Investigated the impact of cancer-derived factors (Activin A, IL-6) on muscle and neuromuscular junctions (NMJs).
  • Employed gene delivery and pharmacological agents to modulate BMP signaling in tumor-bearing mice.

Main Results:

  • Diminished BMP signaling was observed early in muscle wasting associated with cancer cachexia in both preclinical models and human patients.
  • Cancer factors (Activin A, IL-6) induce Noggin, a BMP inhibitor, leading to NMJ disruption, denervation, and muscle atrophy.
  • Enhancing BMP signaling in muscles of tumor-bearing mice prevented muscle wasting and preserved NMJ function.

Conclusions:

  • Perturbed BMP signaling and subsequent denervation are key mechanisms driving muscle wasting in cancer cachexia.
  • Restoring BMP-mediated signaling presents a promising therapeutic strategy to combat muscle loss and maintain function in cancer patients.
  • Targeting the BMP pathway offers a novel approach to improve quality of life for individuals with advanced cancers.

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