scholarly journals Characterization of Pectoralis Major Muscle Satellite Cell Population Heterogeneity, Macrophage Density, and Collagen Infiltration in Broiler Chickens Affected by Wooden Breast

2020 ◽  
Vol 11 ◽  
Author(s):  
Tamara Z. Ferreira ◽  
Liris Kindlein ◽  
Joshua J. Flees ◽  
Lauren K. Shortnacy ◽  
Sergio L. Vieira ◽  
...  
Keyword(s):  
Satellite Cell ◽  
Cell Population ◽  
Broiler Chickens ◽  
Pectoralis Major Muscle ◽  
Pectoralis Major ◽  
Population Heterogeneity ◽  
Muscle Satellite Cell ◽  
Macrophage Density ◽  
Wooden Breast

scholarly journals Ectopic Lipid Accumulation is Key Feature in Early Stages of Wooden Breast

2019 ◽  
Author(s):  
Juniper A. Lake ◽  
Michael B. Papah ◽  
Behnam Abasht
Keyword(s):  
Expression Analysis ◽  
Lipid Accumulation ◽  
Broiler Chickens ◽  
Pectoralis Major Muscle ◽  
Differential Expression Analysis ◽  
Breast Disease ◽  
Pectoralis Major ◽  
P Value ◽  
Altered Expression ◽  
Wooden Breast

Wooden breast is a muscle disorder affecting modern commercial broiler chickens that causes a palpably firm pectoralis major muscle and severe reduction in meat quality. Most studies have focused on advanced stages of wooden breast apparent at market age, resulting in limited insights into the etiology and early pathogenesis of the myopathy. Therefore, the objective of this study was to identify early molecular signals in the wooden breast transcriptional cascade by performing gene expression analysis on the pectoralis major muscle of two-week-old birds that may later exhibit the wooden breast phenotype by market age at 7 weeks. Biopsy samples of the left pectoralis major muscle were collected from a subset of 101 birds randomly selected from a total of 302 birds at 14 days of age, after which all birds were raised to 7 weeks of age for scoring of wooden breast. RNA sequencing was performed on 5 unaffected and 8 affected female chicken samples, selected based on wooden breast scores (0 to 4) assigned at necropsy where affected birds had scores of 2 or 3 (mildly or moderately affected) while unaffected birds had scores of 0 (no apparent gross lesions). Differential expression analysis identified 60 genes found to be significant at an FDR-adjusted p value of 0.05. Of these, 26 were previously demonstrated to exhibit altered expression or genetic polymorphisms related to glucose tolerance or diabetes mellitus in mammals. Additionally, 9 genes have functions directly related to lipid metabolism and 11 genes are associated with adiposity traits such as intramuscular fat and body mass index. This study suggests that wooden breast disease is first and foremost a metabolic disorder characterized primarily by ectopic lipid accumulation in the pectoralis major.

scholarly journals Increased Expression of Lipid Metabolism Genes in Early Stages of Wooden Breast Links Myopathy of Broilers to Metabolic Syndrome in Humans

Genes ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 746 ◽  
Author(s):  
Juniper A. Lake ◽  
Michael B. Papah ◽  
Behnam Abasht
Keyword(s):  
Lipid Metabolism ◽  
Expression Analysis ◽  
Broiler Chickens ◽  
Pectoralis Major Muscle ◽  
Differential Expression Analysis ◽  
Breast Disease ◽  
Pectoralis Major ◽  
P Value ◽  
Altered Expression ◽  
Wooden Breast

Wooden breast is a muscle disorder affecting modern commercial broiler chickens that causes a palpably firm pectoralis major muscle and severe reduction in meat quality. Most studies have focused on advanced stages of wooden breast apparent at market age, resulting in limited insights into the etiology and early pathogenesis of the myopathy. Therefore, the objective of this study was to identify early molecular signals in the wooden breast transcriptional cascade by performing gene expression analysis on the pectoralis major muscle of two-week-old birds that may later exhibit the wooden breast phenotype by market age at 7 weeks. Biopsy samples of the left pectoralis major muscle were collected from 101 birds at 14 days of age. Birds were subsequently raised to 7 weeks of age to allow sample selection based on the wooden breast phenotype at market age. RNA-sequencing was performed on 5 unaffected and 8 affected female chicken samples, selected based on wooden breast scores (0 to 4) assigned at necropsy where affected birds had scores of 2 or 3 (mildly or moderately affected) while unaffected birds had scores of 0 (no apparent gross lesions). Differential expression analysis identified 60 genes found to be significant at an FDR-adjusted p-value of 0.05. Of these, 26 were previously demonstrated to exhibit altered expression or genetic polymorphisms related to glucose tolerance or diabetes mellitus in mammals. Additionally, 9 genes have functions directly related to lipid metabolism and 11 genes are associated with adiposity traits such as intramuscular fat and body mass index. This study suggests that wooden breast disease is first and foremost a metabolic disorder characterized primarily by ectopic lipid accumulation in the pectoralis major.

scholarly journals Increased Expression of Lipid Metabolism Genes in Early Stages of Wooden Breast Links Myopathy of Broilers to Metabolic Syndrome in Humans

2019 ◽  
Author(s):  
Juniper A. Lake ◽  
Michael B. Papah ◽  
Behnam Abasht
Keyword(s):  
Lipid Metabolism ◽  
Expression Analysis ◽  
Broiler Chickens ◽  
Pectoralis Major Muscle ◽  
Differential Expression Analysis ◽  
Breast Disease ◽  
Pectoralis Major ◽  
P Value ◽  
Altered Expression ◽  
Wooden Breast

Wooden breast is a muscle disorder affecting modern commercial broiler chickens that causes a palpably firm pectoralis major muscle and severe reduction in meat quality. Most studies have focused on advanced stages of wooden breast apparent at market age, resulting in limited insights into the etiology and early pathogenesis of the myopathy. Therefore, the objective of this study was to identify early molecular signals in the wooden breast transcriptional cascade by performing gene expression analysis on the pectoralis major muscle of two-week-old birds that may later exhibit the wooden breast phenotype by market age at 7 weeks. Biopsy samples of the left pectoralis major muscle were collected from 101 birds at 14 days of age. Birds were subsequently raised to 7 weeks of age to allow sample selection based on the wooden breast phenotype at market age. RNA sequencing was performed on 5 unaffected and 8 affected female chicken samples, selected based on wooden breast scores (0 to 4) assigned at necropsy where affected birds had scores of 2 or 3 (mildly or moderately affected) while unaffected birds had scores of 0 (no apparent gross lesions). Differential expression analysis identified 60 genes found to be significant at an FDR-adjusted p value of 0.05. Of these, 26 were previously demonstrated to exhibit altered expression or genetic polymorphisms related to glucose tolerance or diabetes mellitus in mammals. Additionally, 9 genes have functions directly related to lipid metabolism and 11 genes are associated with adiposity traits such as intramuscular fat and body mass index. This study suggests that wooden breast disease is first and foremost a metabolic disorder characterized primarily by ectopic lipid accumulation in the pectoralis major.

scholarly journals Nucleotides in broiler chicken diet: effect on breast muscles quality

2011 ◽  
Vol 29 (No. 4) ◽  
pp. 308-317 ◽  
Author(s):  
B. Chiofalo ◽  
V. Lo Presti ◽  
G. Samoini ◽  
D. Alessandro E ◽  
V. Chiofalo ◽  
...  
Keyword(s):  
Shear Force ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Pectoralis Major Muscle ◽  
Dietary Supplementation ◽  
Pectoralis Major ◽  
Atherogenic Index ◽  
Homogeneous Groups ◽  
Lower Shear ◽  
Nutritional Characteristics

The study evaluated the effects of nucleotide dietary supplementation on the physical and nutritional characteristics of the Pectoralis major muscle of male broiler chickens (n = 60 000), divided into two homogeneous groups: Control (C) and Nucleotides (N). The animals of the two groups, from the birth (24 h of age) to the slaughtering age (52 days), received the same diet, supplemented (N) or not (C) with 0.1% of a Nucleotide pool. At the slaughtering, on a sample of 130 animals per group, randomly selected, the physical and nutritional characteristics of Pectoralis major muscle were determined. The meat of the N group showed significantly higher redness and Hue values, lower shear force values, higher lipid and ash percentages and iron content. Moreover, nucleotides significantly increased monounsaturated acids and linolenic acid and decreased eicosapentanoic and docosahexanoic acids. The unsaturation degree was higher in the Nucleotides group and Atherogenic index was positively influenced by the nucleotide supplementation. Nucleotide dietary supplementation improved the physical and nutritional characteristics of the Pectoralis major muscle of broiler chickens.

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