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Tittel: 20241111_Wooden Breast Chicken MS data

ABSTRACT: Male Ross 308 broiler chickens (Gallus Gallus) were raised with ad libitum access to a pelleted wheat/maize diet from the 10th day of age. Breast muscle was acquired from the chickens at 36 days post-hatching. The degree of wooden breast (non-affected, moderately affected and affected) were first sorted by palpation of individual chickens, followed by classification using near-infrared (NIR) spectroscopy of breast filet and histology of specimen. Samples were grouped into three categories: affected, moderately affected and non-affected according to WB myopathy based on the connective tissue content (fibrotic signs). For the shotgun proteomics analysis, salt soluble proteins were extracted from breast filet. Twelve biological replicates of each group were included in the analysis. The proteins were reduced and alkylated prior to digestion with Trypsin/Lys-C. And peptides were analyzed by Dionex Ultimate 3000 UHPLC (Thermo Scientific) coupled to a Q-Exactive hybrid quadrupole Orbitrap mass spectrometer (Thermo Scientific).

INSTRUMENT(S): LTQ Orbitrap

ORGANISM(S): Gallus Gallus (ncbitaxon:9031)

SUBMITTER: Shiori Koga

PROVIDER: MSV000096414 | MassIVE | Thu Nov 14 01:09:00 GMT 2024

REPOSITORIES: MassIVE

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Project description:Introduction: Skeletal muscle satellite cells (MuSCs, or stem cells) play a crucial role in muscle development, maintenance, and regeneration, serving both hypertrophic support 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 to 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 in vitro and in vivo. SDC4 overexpression in MuSCs and blocking peptides corresponding to the SDC4 ectodomain were used for investigation of the role of SDC4 in muscle development and its shedding levels. Results and Discussion: Examination in vivo of affected muscles revealed smaller fibers and changes in metabolic pathways. In vitro studies unveiled disrupted proliferation of MuSCs in WB myopathy, accompanied by downregulation of several muscle markers. Investigation of a potentially 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 decreased proliferation in MuSCs and affected myogenesis. We detected the impairment 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 valuable knowledge on the molecular mechanisms underlying WB myopathy and role of SDC4 in this chicken myopathy.

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Tittel: 20241111_Wooden Breast Chicken MS data

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