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Reidy PT, Dupont-Versteegden EE, Drummond MJ. Macrophage Regulation of Muscle Regrowth From Disuse in Aging. Exerc Sport Sci Rev 2019; 47:246-250. [DOI: 10.1249/jes.0000000000000201] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Reidy PT, McKenzie AI, Mahmassani ZS, Petrocelli JJ, Nelson DB, Lindsay CC, Gardner JE, Morrow VR, Keefe AC, Huffaker TB, Stoddard GJ, Kardon G, O'Connell RM, Drummond MJ. Aging impairs mouse skeletal muscle macrophage polarization and muscle-specific abundance during recovery from disuse. Am J Physiol Endocrinol Metab 2019; 317:E85-E98. [PMID: 30964703 PMCID: PMC6689737 DOI: 10.1152/ajpendo.00422.2018] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Impaired recovery of aged muscle following a disuse event is an unresolved issue facing the older adult population. Although investigations in young animals have suggested that rapid regrowth of skeletal muscle following a disuse event entails a coordinated involvement of skeletal muscle macrophages, this phenomenon has not yet been thoroughly tested as an explanation for impaired muscle recovery in aging. To examine this hypothesis, young (4-5 mo) and old (24-26 mo) male mice were examined as controls following 2 wk of hindlimb unloading (HU) and following 4 (RL4) and 7 (RL7) days of reloading after HU. Muscles were harvested to assess muscle weight, myofiber-specifc cross-sectional area, and skeletal muscle macrophages via immunofluorescence. Flow cytometry was used on gastrocnemius and soleus muscle (at RL4) single-cell suspensions to immunophenotype skeletal muscle macrophages. Our data demonstrated impaired muscle regrowth in aged compared with young mice following disuse, which was characterized by divergent muscle macrophage polarization patterns and muscle-specifc macrophage abundance. During reloading, young mice exhibited the classical increase in M1-like (MHC II+CD206-) macrophages that preceeded the increase in percentage of M2-like macrophages (MHC II-CD206+); however, old mice did not demonstrate this pattern. Also, at RL4, the soleus demonstrated reduced macrophage abundance with aging. Together, these data suggest that dysregulated macrophage phenotype patterns in aged muscle during recovery from disuse may be related to impaired muscle growth. Further investigation is needed to determine whether the dysregulated macrophage response in the old during regrowth from disuse is related to a reduced ability to recruit or activate specific immune cells.
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Affiliation(s)
- Paul T Reidy
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | - Alec I McKenzie
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | - Ziad S Mahmassani
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | - Jonathan J Petrocelli
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | - Daniel B Nelson
- Department of Nutrition and Integrative Physiology, University of Utah , Salt Lake City, Utah
| | | | - James E Gardner
- School of Medicine, University of Utah , Salt Lake City, Utah
| | - Vincent R Morrow
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | | | | | - Greg J Stoddard
- Division of Epidemiology, University of Utah, School of Medicine , Salt Lake City, Utah
| | | | - Ryan M O'Connell
- Department of Pathology, University of Utah , Salt Lake City, Utah
| | - Micah J Drummond
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
- Department of Nutrition and Integrative Physiology, University of Utah , Salt Lake City, Utah
- Department of Pathology, University of Utah , Salt Lake City, Utah
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Shibaguchi T, Sugiura T, Fujitsu T, Nomura T, Yoshihara T, Naito H, Yoshioka T, Ogura A, Ohira Y. Effects of icing or heat stress on the induction of fibrosis and/or regeneration of injured rat soleus muscle. J Physiol Sci 2016; 66:345-57. [PMID: 26759024 PMCID: PMC10717209 DOI: 10.1007/s12576-015-0433-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 12/18/2015] [Indexed: 11/24/2022]
Abstract
The effects of icing or heat stress on the regeneration of injured soleus muscle were investigated in male Wistar rats. Bupivacaine was injected into soleus muscles bilaterally to induce muscle injury. Icing (0 °C, 20 min) was carried out immediately after the injury. Heat stress (42 °C, 30 min) was applied every other day during 2-14 days after the bupivacaine injection. Injury-related increase in collagen deposition was promoted by icing. However, the level of collagen deposition in heat-stressed animals was maintained at control levels throughout the experimental period and was significantly lower than that in icing-treated animals at 15 and 28 days after bupivacaine injection. Furthermore, the recovery of muscle mass, protein content, and muscle fiber size of injured soleus toward control levels was partially facilitated by heat stress. These results suggest that, compared with icing, heat stress may be a beneficial treatment for successful muscle regeneration at least by reducing fibrosis.
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Affiliation(s)
- Tsubasa Shibaguchi
- Graduate School of Frontier Biosciences, Osaka University, 1-17 Machikaneyama-cho, Toyonaka City, Osaka, 560-0043, Japan.
| | - Takao Sugiura
- Department of Exercise and Health Sciences, Faculty of Education, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Takanori Fujitsu
- Department of Exercise and Health Sciences, Faculty of Education, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Takumi Nomura
- Department of Exercise and Health Sciences, Faculty of Education, Yamaguchi University, Yamaguchi City, Yamaguchi, Japan
| | - Toshinori Yoshihara
- Graduate School of Health and Sports Science, Juntendo University, Inzai City, Chiba, Japan
| | - Hisashi Naito
- Graduate School of Health and Sports Science, Juntendo University, Inzai City, Chiba, Japan
| | | | - Akihiko Ogura
- Graduate School of Frontier Biosciences, Osaka University, 1-17 Machikaneyama-cho, Toyonaka City, Osaka, 560-0043, Japan
| | - Yoshinobu Ohira
- Graduate School of Health and Sports Science, Doshisha University, Kyotanabe City, Kyoto, Japan
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