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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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A novel orthotopic mouse model replicates human lung cancer cachexia.
Wouter R P H van de Worp1, Jan Theys2, Alba Sanz González1
1Department of Respiratory Medicine, NUTRIM - School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands.
Journal of Cachexia, Sarcopenia and Muscle
|April 7, 2023
Summary
A new orthotopic mouse model effectively replicates lung cancer cachexia, showing significant muscle mass and strength loss. This model mirrors human patient alterations, aiding future research into cachexia mechanisms and treatments.
Area of Science:
- Oncology
- Physiology
- Biochemistry
Background:
- Cancer cachexia is a prevalent, debilitating syndrome in lung cancer patients, marked by involuntary skeletal muscle mass loss.
- It significantly worsens clinical outcomes, reduces survival, and impedes tumor therapy effectiveness.
- Existing animal models often fail to replicate key anatomical and immunological features of human lung cancer cachexia.
Purpose of the Study:
- To evaluate a syngeneic, orthotopic lung cancer mouse model for its ability to replicate systemic and muscle-specific alterations characteristic of human lung cancer cachexia.
- To establish a more accurate preclinical model for investigating cancer cachexia mechanisms and testing interventions.
Main Methods:
- Immune-competent mice were inoculated with syngeneic lung adenocarcinoma cells orthotopically.
- Daily monitoring of body weight and food intake, with weekly assessments of grip strength, tumor growth, and muscle volume via micro-CT.
- Biochemical analysis of skeletal muscle post-euthanasia at predefined endpoints.
Main Results:
- Two-thirds of tumor-bearing mice developed cachexia, exhibiting significant reductions in body weight, muscle mass, and grip strength compared to controls.
- Cachectic mice showed upregulated proteolysis markers (ubiquitin-proteasome and autophagy-lysosomal pathways) and downregulated protein synthesis markers in skeletal muscle.
- Elevated plasma pentraxin-2 and CXCL1/KC, along with increased skeletal muscle IκBα mRNA, indicated systemic inflammation. Muscle transcriptomic profiles closely mirrored those in human lung cancer cachexia patients.
Conclusions:
- An orthotopic lung cancer mouse model was successfully developed, accurately mimicking key aspects of cachexia observed in human patients.
- This model's ability to replicate systemic and muscle-specific alterations makes it highly suitable for further mechanistic studies.
- The model provides a valuable platform for testing novel therapeutic strategies aimed at combating lung cancer cachexia.
