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The Colon-26 Carcinoma Tumor-bearing Mouse as a Model for the Study of Cancer Cachexia
08:55

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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Nutraceutical targeting of TLR4 signaling has potential for prevention of cancer cachexia

Mark F McCarty1, Simon Iloki-Assanga2, Lidianys Maria Lewis Lujany2

  • 1Catalytic Longevity, San Diego, California, USA.

Medical Hypotheses
|August 18, 2019
PubMed

Insights

Cancer cachexia, a major cause of cancer deaths, is triggered by microvesicles from tumors. These microvesicles activate toll-like receptor 4 (TLR4), leading to muscle and fat loss. Nutraceuticals targeting TLR4 may help manage cachexia.

Area of Science:

  • Oncology
  • Molecular Biology
  • Immunology

Background:

  • Cancer cachexia is a significant contributor to cancer-related mortality, with its underlying mechanisms previously unclear.
  • Recent findings illuminate the role of tumor-released microvesicles in cachexia development.

Purpose of the Study:

  • To elucidate the molecular mechanisms by which cancers induce cachexia.
  • To identify potential therapeutic targets for preventing and managing cancer cachexia.

Main Methods:

  • Analysis of microvesicles released by cachexia-evoking cancers.
  • Investigation of the role of heat shock proteins (HSPs) 70 and 90 in microvesicles.
  • Assessment of the activation of toll-like receptor 4 (TLR4) signaling in target cells (skeletal muscle, macrophages, adipocytes).

Main Results:

  • Cancers causing cachexia release microvesicles containing heat shock proteins 70 and 90.
  • These extracellular heat shock proteins act as agonists for toll-like receptor 4 (TLR4).
  • TLR4 activation in skeletal muscle, macrophages, and adipocytes mediates cachexia.

Conclusions:

  • Tumor-derived microvesicles carrying HSPs activate TLR4, driving cancer cachexia.
  • Down-regulating TLR4 signaling presents a potential therapeutic strategy for cancer cachexia.
  • Specific nutraceuticals, including phycocyanobilin and omega-3 fatty acids, may modulate TLR4 signaling and aid in cachexia management.

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