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Utility of 17-(allylamino)-17-demethoxygeldanamycin treatment for skeletal muscle injury

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Cell Stress and Chaperones Aims and scope


Repeated eccentric contractions can injure skeletal muscle and result in functional deficits that take several weeks to fully recover. The 70-kDa heat shock protein (Hsp70) is a stress-inducible molecular chaperone that maintains protein quality and plays an integral role in the muscle’s repair processes following injury. Here, we attempted to hasten this recovery by pharmacologically inducing Hsp70 expression in mouse skeletal muscle with 17-(allylamino)-17-demethoxygeldanamycin (17-AAG) (40 mg/kg) both prior to and throughout the first 7 days after an injurious bout of 150 maximal eccentric contractions. Hsp70 content in the injured skeletal muscle was strongly induced following the eccentric contractions and remained elevated over the next 7 days as the muscle underwent repair. Treatment with 17-AAG increased Hsp70 content ∼fivefold; however, this was significantly less than that induced by the injury. Moreover, 17-AAG treatment did not recover the decrements to in vivo isometric torque production following the bout of eccentric contractions. Together, these findings demonstrate that although Hsp70 content was induced in the uninjured skeletal muscle, treatment of 17-AAG (40 mg/kg) was not a preventive measure to either reduce the severity of skeletal muscle damage or enhance functional recovery following a bout of maximal eccentric contractions.

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Correspondence to Cory W. Baumann.

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All procedures were approved by the Georgia State University Institutional Animal Care and Use Committee.


This study was partially supported by a NIA/NIH training grant (T32-AG029796).


No conflicts of interest, financial or otherwise, are declared by the authors.

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Baumann, C.W., Rogers, R.G. & Otis, J.S. Utility of 17-(allylamino)-17-demethoxygeldanamycin treatment for skeletal muscle injury. Cell Stress and Chaperones 21, 1111–1117 (2016).

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