Wooden Breast Myopathy is Characterized by Satellite Cell Dysfunction and Syndecan-4 Shedding

Overview

Journal Front Physiol

Date 2025 Jan 7

PMID 39764382

Authors

Lucie Pejskova

Addolorata Pisconti

Marianne Lunde

Ka Yi Ho

Nina Therese Solberg

Shiori Koga

Erik Tengstrand

Cathrine Rein Carlson

Mona Elisabeth Pedersen

Sissel Beate Ronning

Affiliations

Soon will be listed here.

Abstract

Introduction: Skeletal muscle satellite cells (MuSCs or stem cells) play a crucial role in muscle development, maintenance, and regeneration, supporting both hypertrophy and regenerative myogenesis. Syndecans (SDCs) act as communication bridges within the muscle microenvironment, regulating interactions with extracellular matrix components and contributing significantly to tissue repair and inflammation. Specifically, syndecan-4 (SDC4) is involved in muscle regeneration at multiple stages.

Methods: This study delves into the emerging challenge of wooden breast (WB) myopathy and its connection with SDC4. Our hypothesis proposes that disruptions in MuSC dynamics through SDC4 contribute to the increased incidence of breast myopathies observed in growing broilers. To test our hypothesis, non-affected and affected broilers were systematically selected, and the characteristics of WB myopathy were studied both and . SDC4 overexpression in MuSCs and blocking peptides (BPs) corresponding to the SDC4 ectodomain were used for investigating the role of SDC4 in muscle development and its shedding levels.

Results And Discussion: examination of affected muscles revealed smaller fibers and changes in metabolic pathways. studies unveiled disrupted proliferation of MuSCs in WB myopathy, accompanied by the downregulation of several muscle markers. Investigation of the potential role of SDC4 in the pathogenesis of WB myopathy revealed a decreased tendency in SDC4 gene expression and increased shedding of its ectodomain. Moreover, we showed that SDC4 overexpression is linked to reduced proliferation in MuSCs and affected myogenesis. We detected an impaired proliferation of WB-affected MuSCs, revealing critical insights into the dysfunctional state of these cells in myopathy. Additionally, by treating MuSCs with blocking peptides derived from the SDC4 ectodomain, we identified altered proliferation. Taken together, this work contributes with valuable knowledge on the molecular mechanisms underlying WB myopathy and the role of SDC4 in this chicken myopathy.

Citing Articles

Molecular characterization of the heterogeneity of satellite cell populations isolated from an individual Turkey pectoralis major muscle.

Yu H, Li Z, Yimiletey J, Wan C, Velleman S Front Physiol. 2025; 16:1547188.

PMID: 40052144 PMC: 11882874. DOI: 10.3389/fphys.2025.1547188.

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