Cited by 22Muscle Physiology and DisordersExercise and Physiological ResponsesMuscle and Compartmental Disorders

FKBP12 deficiency reduces strength deficits after eccentric contraction-induced muscle injury

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Corona, Benjamin T., Rouviere, Clement, Hamilton, Susan L., Ingalls, Christopher P.·2008·Journal of Applied Physiology

Abstract

Strength deficits associated with eccentric contraction-induced muscle injury stem, in part, from excitation-contraction uncoupling. FKBP12 is a 12-kDa binding protein known to bind to the skeletal muscle sarcoplasmic reticulum Ca2+ release channel [ryanodine receptor (RyR1)] and plays an important role in excitation-contraction coupling. To assess the effects of FKBP12 deficiency on muscle injury and recovery, we measured anterior crural muscle (tibialis anterior and extensor digitorum longus muscles) strength in skeletal muscle-specific FKBP12-deficient and wild-type (WT) mice before and after a single bout of 150 eccentric contractions, as well as before and after the performance of six injury bouts. Histological damage of the tibialis anterior muscle was assessed after injury. Body weight and peak isometric and eccentric torques were lower in FKBP12-deficient mice compared with WT mice. There were no differences between FKBP12-deficient and WT mice in preinjury peak isometric and eccentric torques when normalized to body weight, and no differences in the relative decreases in eccentric torque with a single or multiple injury bouts. After a single injury bout, FKBP12-deficient mice had less initial strength deficits and recovered faster (especially females) than WT mice, despite no differences in the degree of histological damage. After multiple injury bouts, FKBP12-deficient mice recovered muscle strength faster than WT mice and exhibited significantly less histological muscle damage than WT mice. In summary, FKBP12 deficiency results in less initial strength deficits and enhanced recovery from single (especially females) and repeated bouts of injury than WT mice.

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Crossref · 10.1152/japplphysiol.01145.2007

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  1. [12]Ingalls CP, Warren GL, Lowe DA, Boorstein DB, Armstrong RB. Differential effects of anesthetics on contractile function of mouse ankle dorsiflexor muscles in vivo. J Appl Physiol 80: 332–340, 1996. [DOI] [PubMed] [Google Scholar]

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Authors
Corona, B. T., Rouviere, C., Hamilton, S. L., & Ingalls, C. P.
Affiliations
Georgia State University (US)
Venue
Journal of Applied Physiology
Published
2008-08
Volume
105
Issue
2
Pages
527-537
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
OpenAlex
W2045975937
Cited by
22
References
40
Citations by year
2026: 1 · 2023: 2 · 2022: 1 · 2021: 1 · 2020: 1 · 2018: 1 · 2016: 3 · 2014: 4 · 2013: 1 · 2012: 1
FWCI
0.82
Type
journal article
Language
en
Open access
Locations
  • Journal of Applied Physiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR041802, AR-41802)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Health Sciences › Medicine › Surgery › Muscle and Compartmental Disorders
Keywords
FKBP12, excitation-contraction uncoupling, ryanodine receptor, sarcoplasmic reticulum, muscle strength deficits, muscle injury recovery, tibialis anterior, extensor digitorum longus, sex differences, skeletal muscle
MeSH terms
Central Nervous System Stimulants, Animals, Body Weight, Caffeine, Electric Stimulation, Female, Isometric Contraction, Male, Muscle Contraction, Organ Size, Sex Characteristics, Mice, Knockout, Muscle, Skeletal, Tacrolimus Binding Protein 1A, Mice, Muscle Strength

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