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Single-cell analysis reveals gene expression profiles and cell types in wooden breast myopathy

ABSTRACT: Wooden Breast (WB) is a novel myopathy affecting the pectoralis major muscle of modern broiler chickens. We selected pectoralis fillet samples, a normal(healthy) fillet and a WB fillet.

ORGANISM(S): Gallus gallus

PROVIDER: GSE200516 | GEO | 2022/04/13

REPOSITORIES: GEO

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Muscle transcriptional profiles of chickens from slow and fast growing lines with different degree of WS and WB myopathies

Project description:Broiler industry is facing an increasing prevalence of breast myopathies such as white striping (WS) and wooden breast (WB), whose precise etiology remains poorly understood. In order to progress in the understanding of the structural changes and the molecular pathways involved in these myopathies, and identify biomarkers, a transcriptomic analysis using an 8×60K Agilent chicken microarray was performed. The study used pectoralis major muscles from three groups: slow-growing animals (n=8), fast-growing animals visually free from defects (n=8) or severely affected by both WS and WB (n=8). In addition, a weighted correlation network analysis was performed to investigate the relationship between modules of co-expressed genes and histological traits.

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Transcriptome analysis of post-hatch breast muscle in legacy and modern broiler chickens reveals enrichment of several regulators of myogenic growth

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Single-cell analysis reveals gene expression profiles and cell types in wooden breast myopathy

Project description:Single-cell analysis reveals gene expression profiles and cell types in wooden breast myopathy

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Evaluation via Supervised Machine Learning of the Broiler Pectoralis Major and Liver Transcriptome in Association with the Muscle Myopathy Wooden Breast

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Detection of differentially expressed genes in broiler Pectoralis major muscle affected by White Striping – Wooden Breast myopathies

Project description:White Striping and Wooden Breast (WS/WB) are abnormalities increasingly occurring in the fillets of high breast yield and growth rate chicken hybrids. These defects lead to consistent economic losses for poultry meat industry, as affected broilers fillets present an impaired visual appearance that negatively affects consumers’ acceptability. Previous studies have highlighted in affected fillets a deeply damaged muscle, showing profound inflammation, fibrosis and lipidosis. The present study investigated the differentially expressed genes and pathways linked to the compositional changes observed in WS/WB breast muscles, in order to outline a more complete framework of the gene networks related to the occurrence of this complex pathological picture. The biochemical composition was performed on 20 Pectoralis major samples obtained from high breast yield and growth rate broilers (10 affected vs. 10 normal) and 12 out of the 20 samples were used for the microarray gene expression profiling (6 affected vs. 6 normal). The obtained results indicate strong changes in muscle mineral composition, coupled to an increased deposition of fat. In addition, 204 differentially expressed genes (DEG) were found: 102 up-regulated and 102 down-regulated in affected breasts. The gene expression pathways found more altered in WS/WB muscles are those related to muscle development, polysaccharide metabolic processes, proteoglycans synthesis, inflammation and calcium signaling pathway. On the whole, the findings suggest that a multifactorial and complex etiology is associated with the occurrence of WS/WB muscle abnormalities, contributing to further define the transcription patterns associated to these myopathies.

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