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Role of 72-kDa Heat Shock Protein in Heat-stimulated Regeneration of Injured Muscle in Rat. 2019

Katsuya Kami, and Takashi Ohira, and Yasuharu Oishi, and Takayuki Nakajima, and Katsumasa Goto, and Yoshinobu Ohira
Graduate School of Medicine, Osaka University, Osaka, Japan.

The regeneration of injured muscles is facilitated by intermittent heat stress. The 72-kDa heat shock protein (HSP72), the level of which is increased by heat stress, is likely involved in this effect, but the precise mechanism remains unclear. This study was conducted to investigate the localization and role(s) of HSP72 in the regenerating muscles in heat-stressed rats using immunohistochemistry. Heat stress was applied by immersion of the rat lower body into hot water (42C, 30 min, every other day) following injection of bupivacaine into the soleus muscles. After 1 week, we found that HSP72 was expressed at high levels not only in the surviving myofibers but also in the blood vessels of the regenerating muscles in heated rats. In addition, leukocytes, possibly granulocytes, expressing cluster of differentiation 43 within the blood capillaries surrounding the regenerating myofibers also highly expressed HSP72. In contrast, marked expression of HSP72 was not observed in the intact or regenerating muscles without heat stress. These results suggest that heat-stress-induced HSP72 within the myofibers, blood vessels, and circulating leukocytes may play important roles in enhancing regeneration of injured muscles by heat stress. Our findings would be useful to investigate cell-specific role(s) of HSP72 during skeletal muscle regeneration.

UI MeSH Term Description Entries
D008297 Male Males
D012038 Regeneration The physiological renewal, repair, or replacement of tissue. Endogenous Regeneration,Regeneration, Endogenous,Regenerations
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D017208 Rats, Wistar A strain of albino rat developed at the Wistar Institute that has spread widely at other institutions. This has markedly diluted the original strain. Wistar Rat,Rat, Wistar,Wistar Rats
D050884 HSP72 Heat-Shock Proteins Stress-inducible members of the heat-shock proteins 70 family. HSP72 heat shock proteins function with other MOLECULAR CHAPERONES to mediate PROTEIN FOLDING and to stabilize pre-existent proteins against aggregation. Heat Shock Proteins 72,HSP-72 Protein,HSP70-1 Heat Shock Proteins,Heat Shock Protein 72,Heat-Shock Protein p72,Hsp72 Protein,HSP 72 Protein,HSP70 1 Heat Shock Proteins,HSP72 Heat Shock Proteins,Heat Shock Protein p72,Heat-Shock Proteins, HSP72,p72, Heat-Shock Protein
D051381 Rats The common name for the genus Rattus. Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus
D018482 Muscle, Skeletal A subtype of striated muscle, attached by TENDONS to the SKELETON. Skeletal muscles are innervated and their movement can be consciously controlled. They are also called voluntary muscles. Anterior Tibial Muscle,Gastrocnemius Muscle,Muscle, Voluntary,Plantaris Muscle,Skeletal Muscle,Soleus Muscle,Muscle, Anterior Tibial,Muscle, Gastrocnemius,Muscle, Plantaris,Muscle, Soleus,Muscles, Skeletal,Muscles, Voluntary,Skeletal Muscles,Tibial Muscle, Anterior,Voluntary Muscle,Voluntary Muscles
D018869 Heat-Shock Response A sequence of responses that occur when an organism is exposed to excessive heat. In humans, an increase in skin temperature triggers muscle relaxation, sweating, and vasodilation. Heat-Shock Reaction,Heat Shock,Heat Shock Stress,Heat Stress,Heat-Stress Reaction,Heat-Stress Response,Heat Shock Reaction,Heat Shock Response,Heat Shock Stresses,Heat Shocks,Heat Stress Reaction,Heat Stress Response,Heat Stresses,Heat-Shock Reactions,Heat-Shock Responses,Heat-Stress Reactions,Heat-Stress Responses,Shock, Heat,Stress, Heat,Stress, Heat Shock

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