The physical and biological characterization of a frail mouse model.

The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
Jeremy WalstonKevin Becker

Abstract

The development of animal models that approximate human frailty is necessary to facilitate etiologic and treatment-focused frailty research. The genetically altered IL-10(tm/tm) mouse does not express the antiinflammatory cytokine interleukin 10 (IL-10) and is, like frail humans, more susceptible to inflammatory pathway activation. We hypothesized that with increasing age, IL-10(tm/tm) mice would develop physical and biological characteristics similar to those of human frailty as compared to C57BL/6J control mice. Strength, activity, serum IL-6, and skeletal muscle gene expression were compared between age-matched and gender-matched IL-10(tm/tm) mice on C57BL/6J background and C57BL/6J control mice using a longitudinal design for physical characteristics and cross-sectional design for biological characteristics. Strength levels declined significantly faster in IL-10(tm/tm) compared to control mice with increasing age. Serum IL-6 levels were significantly higher in older compared to younger IL-10(tm/tm) mice and were significantly higher in older IL-10(tm/tm) compared to age- and gender-matched C57BL/6J control mice. One hundred twenty-five genes, many related to mitochondrial biology and apoptosis, were differentially expressed...Continue Reading

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Citations

Sep 21, 2013·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Jocelyne C WhiteheadSusan E Howlett
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