Cited by 279Muscle Physiology and DisordersCytokine Signaling Pathways and InteractionsCardiac Fibrosis and Remodeling

Interleukin-6/signal transducer and activator of transcription 3 (STAT3) pathway is essential for macrophage infiltration and myoblast proliferation during muscle regeneration

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Zhang, Congcong, Li, Yulin, Wu, Yina, Wang, Luya, Wang, Xiaonan, Du, Jie·2013·Journal of Biological Chemistry

Abstract

Inflammation and microenvironment play a crucial role in muscle regeneration. IL (interleukin)-6, as a multifunctional cytokine is involved in the processes. However, the causative effect of IL-6 in muscle regeneration remains unclear. In a mouse model of cardiotoxin-induced muscle injury/regeneration, infiltrated monocytes/macrophages produce a high level of IL-6 started on 1 day (24 h) after injury. In IL-6 knock-out (−/−) mice, the muscle regeneration procedure was impaired along with decreased myogenic determination factor (MyoD) and myogenin mRNA level and increased interstitial fibrosis. The IL-6 −/− mice exhibited less macrophage infiltration, lower inflammatory cytokine (IL-1β, inducible NO synthase, Transforming growth factor (TGF)-β1, and IL-10) and chemokine (CCL2, CCL3, and CCL5) expression, and inhibited myoblast proliferation. In vitro , IL-6 deficiency or Signal Transducer and Activator of Transcription 3 (STAT3) knockdown in activated macrophage attenuated the expression of CCL2, CCL3, but not CCL5, which resulted in less macrophage migration. Moreover, inflammatory macrophages promoted myoblast proliferation in an IL-6-dependent manner. Finally, adoptive transfer IL-6 +/+ BM cells into IL-6 −/− mice rescued the impaired regeneration with improved MyoD and myogenin expression. Taken together, IL-6 expression and the activated STAT3 signaling pathway in monocytes/macrophages is a critical mediator of macrophage migration and myoblast proliferation during muscle regeneration. Background: Interleukin-6 (IL-6), as a multifunctional cytokine, was involved in the inflammation microenvironment of muscle regeneration. Results: In mice lacking IL-6, less macrophage recruitment and decreased myoblast proliferation impairs muscle regeneration. Conclusion: In monocytes/macrophages, activation of the IL-6/STAT3 pathway is critical to macrophage migration and myoblast proliferation during muscle regeneration. Significance: IL-6/STAT3 pathway is essential for muscle regeneration.

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Crossref · 10.1074/jbc.m112.419788

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  • Acute transient increases in inflammation play an important part in early regenerative processes of muscle adaptation, particularly in response to exercise.

    “Acute transient increases in inflammation plays an important part in the early regenerative processes of muscle adaptation, particularly in response to exercise [54,55].”

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Authors
Zhang, C., Li, Y., Wu, Y., Wang, L., Wang, X., & Du, J.
Affiliations
Capital Medical University (CN)
Corresponding author
Du, Jie
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2013-01
Volume
288
Issue
3
Pages
1489-1499
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1969630360
Cited by
279
References
37
Citations by year
2026: 16 · 2025: 15 · 2024: 21 · 2023: 17 · 2022: 20 · 2021: 23 · 2020: 21 · 2019: 20 · 2018: 27 · 2017: 25 · 2016: 22 · 2015: 19 · 2014: 20 · 2013: 12
FWCI
6.55
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR060268)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
Keywords
interleukin-6, STAT3 signaling, muscle regeneration, macrophage infiltration, myoblast proliferation, cardiotoxin-induced muscle injury, IL-6 knockout mice, macrophage migration, MyoD, myogenin, interstitial fibrosis, inflammatory cytokines, bone marrow-derived macrophages
MeSH terms
Animals, Cell Movement, Gene Expression Regulation, Macrophages, Regeneration, RNA, Messenger, Signal Transduction, Interleukin-6, MyoD Protein, Myogenin, Mice, Knockout, Muscle, Skeletal, Myoblasts, Cell Proliferation, STAT3 Transcription Factor, Mice, Cardiotoxins, Primary Cell Culture

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