NCounter Mouse Inflammation (V2) Panel on Muscle from Cancer Cachexia Models
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE245208 | GEO | 2024/08/01
REPOSITORIES: GEO
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Project description:Cachexia is an exacerbating event in many types of cancer that is strongly associated with a poor prognosis. We have identified cytokine, signaling and transcription factors that are required for cachexia in the mouse C26 colon carcinoma model of cancer. C2C12 myotubes treated with conditioned medium from C26 cancer cells induced atrophy and activated a STAT-dependent reporter gene but not reporter genes dependent on SMAD, FOXO, C/EBP, NF-ĸB, or AP-1. Of the gp130 family members IL-11, IL-6, oncostatin M (OSM), and leukemia inhibitory factor (LIF), only OSM and LIF were sufficient to activate the STAT reporter in myotubes. A LIF blocking antibody abolished C26 CM-induced STAT reporter activation STAT3 phosphorylation and myotube atrophy, but blocking antibodies to IL-6 or OSM did not. JAK2 inhibitors also blocked the C26 CM-induced STAT reporter activation, STAT3 phosphorylation, and atrophy in myotubes. LIF at levels found in the C26 CM was sufficient for STAT reporter activation and atrophy in myotubes. In vivo, an increase in serum LIF preceded the increase in IL-6 in mice with C26 tumors. Overexpression of a dominant negative Stat3Cβ-EGFP gene in myotubes and in mouse muscle blocked the atrophy caused by C26 CM or C26 tumors, respectively. Taken together these data support an important role of LIF- JAK2-STAT3 in C26 cachexia and point to a therapeutic approach for at least some types of cancer cachexia. from three replicate wells of cells at each treatment, pools of total RNA were used to create cDNA which were evaluated on Affymetrix mouse gene 1.0 ST v.1 arrays.
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Project description:Cachexia is a wasting syndrome characterized by pronounced skeletal muscle loss. In cancer, cachexia associates with increased morbidity and mortality and decreased treatment tolerance. Although advances have been made in understanding the mechanisms of cachexia, translating these advances to the clinic has been challenging. One reason for this shortcoming may be the current animal models that fail to fully recapitulate the etiology of human cancer-induced tissue wasting. Because pancreatic ductal adenocarcinoma (PDA) presents with a high incidence of cachexia, we engineered a mouse model of PDA, that we named KPP. KPP mice, similar to PDA patients, progressively lose skeletal and adipose mass as a consequence of their tumors. In addition, KPP muscles exhibit a similar gene ontology to cachectic patients. We envision the KPP model will be a useful resource for advancing our mechanistic understanding and ability to treat cancer cachexia.
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Project description:Cachexia is a wasting syndrome characterized by pronounced skeletal muscle loss. In cancer, cachexia associates with increased morbidity and mortality and decreased treatment tolerance. Although advances have been made in understanding the mechanisms of cachexia, translating these advances to the clinic has been challenging. One reason for this shortcoming may be the current animal models that fail to fully recapitulate the etiology of human cancer-induced tissue wasting. Because pancreatic ductal adenocarcinoma (PDA) presents with a high incidence of cachexia, we engineered a mouse model of PDA, that we named KPP. KPP mice, similar to PDA patients, progressively lose skeletal and adipose mass as a consequence of their tumors. In addition, KPP muscles exhibit a similar gene ontology to cachectic patients. We envision the KPP model will be a useful resource for advancing our mechanistic understanding and ability to treat cancer cachexia.
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Project description:Background: Cancer cachexia (CAC) reduces patient survival and quality of life. Developments of efficient therapeutic strategies are required for the CAC treatments. This long-term process could be shortened by the drug-repositioning approach which exploits old drugs approved for non-cachexia disease. Amiloride, a diuretic drug, is clinically used for treatments of hypertension and edema due to heart failure. Here, we explored the effects of amiloride for ameliorating muscle wasting in murine models of cancer cachexia. Methods: CT26 and LLC tumor cells were subcutaneously injected into mice to induce cancer cachexia. Amiloride was intraperitoneally injected daily once tumors were formed. Cachexia features of the CT26 and LLC models, respectively, were characterized by phenotypic, histopathologic and biochemical analyses. Plasma exosomes and muscle atrophy-related proteins were quantitatively analyzed. Integrative NMR-based metabolomic and transcriptomic analyses were conducted to identify significantly altered metabolic pathways and distinctly changed metabolism-related biological processes in gastrocnemius. Results: The CT26 and LLC models displayed prominent cachexia features including decreases in body weight, skeletal muscle, adipose tissue and muscle strength. The amiloride treatment in tumor-bearing mice distinctly alleviated muscle atrophy and relieved cachexia-related features without affecting tumor growth. The CT26 and LLC cachexia mice showed increased particle density of plasma exosomes which were largely derived from tumors. Significantly, the amiloride treatment inhibited tumor-derived exosome release, which did not obviously affect exosome secretion from non-neoplastic tissues or induce observable systemic toxicities in normal healthy mice. Integrative-omics revealed significant metabolic impairments in cachectic gastrocnemius, including promoted muscular catabolism, inhibited muscular protein synthesis, blocked glycolysis and impeded ketone body oxidation. The amiloride treatment evidently improved the metabolic impairments in cachectic gastrocnemius. Conclusions: Our results demonstrated the efficacy of amiloride in ameliorating cachectic muscle wasting and elucidated the underlying mechanistic rationale for its use as an alternative strategy to improve CAC treatments.
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Project description:Analysis of gene expression in CD2F1 mice with cancer cachexia due to implantation of C26 colon carcinoma cells. Total RNA obtained from quadriceps muscle of female CD2F1 mice with early weight loss (10%) or severe weight loss (15%) due to intrascapular subcutaneous implantation of one million C26 colon adenocarcinoma cells.
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