1
|
Vaccaro LA, Herring K, Wilson A, England E, Smith AL, Ellestad LE. Dynamic changes in insulin-like growth factor binding protein expression occur between embryonic and early post-hatch development in broiler chickens. Poult Sci 2024; 103:104174. [PMID: 39197338 PMCID: PMC11398635 DOI: 10.1016/j.psj.2024.104174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 06/07/2024] [Accepted: 07/31/2024] [Indexed: 09/01/2024] Open
Abstract
Somatotropic gene expression has been altered by genetic selection, and developmental changes in insulin-like growth factor (IGF) and IGF binding protein (IGFBP) expression may contribute to rapid growth and muscle accretion in commercial broilers. The objective of this study was to evaluate changes in somatotropic axis activity between embryonic day (e) 12 and post-hatch day (d) 21. Liver and breast muscle (pectoralis major) were collected to measure gene expression, and blood was collected post-hatch to measure circulating IGFs. Liver IGF1 rose rapidly post-hatch and, in muscle, IGF1 exhibited a dynamic expression pattern. Levels decreased from e14 to e20, returned to e14 levels at d3, decreased again at d10, and stayed low thereafter. In both tissues, mRNA levels of several IGFBPs changed between embryogenesis and post-hatch. Liver IGFBP2 increased between e12 and e20, returned to e12 levels on d1, and remained low. Conversely, liver IGFBP4 expression was greater post-hatch than during embryogenesis. Expression of select IGFBPs was depressed in liver during the peri-hatch period. Liver IGFBP1, IGFBP3, IGFBP5, and IGFBP7 mRNA levels all decreased around this time and returned to embryonic levels by d3. In breast muscle, expression of both IGFBP2 and IGFBP4 was reduced after hatch. Circulating insulin-like growth factor IGF1 and IGF2 levels did not change between hatch and d21. These data suggest that post-hatch IGF effects are likely modulated by target tissue IGFR1 and IGFBP expression rather than changes in circulating hormone levels, with promotion or restriction of IGF-receptor binding regulating growth. Downregulation of several IGFBPs synthesized in the liver may facilitate the metabolic transition from utilizing yolk lipids to dietary carbohydrates. Several IGFBPs produced in breast muscle appear to have growth-promotive effects during embryogenesis but restrict growth of this tissue after hatch, as their post-hatch downregulation could facilitate local IGF signaling. These developmental gene expression patterns suggest that somatotropic hormonal signaling regulating growth and muscle accretion might be controlled through differential actions of IGFBPs and provide a basis for future functional studies.
Collapse
Affiliation(s)
- Lauren A Vaccaro
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - Kyle Herring
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - Abigail Wilson
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - Emma England
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - Addison L Smith
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - Laura E Ellestad
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA.
| |
Collapse
|
2
|
Zhang D, Xu F, Liu Y. Research progress on regulating factors of muscle fiber heterogeneity in poultry: a review. Poult Sci 2024; 103:104031. [PMID: 39033575 PMCID: PMC11295477 DOI: 10.1016/j.psj.2024.104031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/20/2024] [Accepted: 06/22/2024] [Indexed: 07/23/2024] Open
Abstract
Control of meat quality traits is an important goal of any farm animal production, including poultry. A better understanding of the biochemical properties of muscle fiber properties that drive muscle development and ultimately meat quality constitutes one of the major challenging topics in animal production and meat science. In this paper, the existing classification methods of skeletal muscle fibers in poultry were reviewed and the relationship between contractile and metabolic characteristics of muscle fibers and poultry meat quality was described. Finally, a comprehensive review of multiple potential factors affecting muscle fiber distribution and conversion is presented, including breed, sex, hormones, growth performance, diet, muscle position, exercise, and ambient temperature. We emphasize that knowledge of muscle fiber typing is essential to better understand how to control muscle characteristics throughout the life cycle of animals to better manage the final quality of poultry meat.
Collapse
Affiliation(s)
- Donghao Zhang
- State Key Laboratory of Swine and Poultry Breeding Industry, Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, and Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Feng Xu
- State Key Laboratory of Swine and Poultry Breeding Industry, Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, and Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Yiping Liu
- State Key Laboratory of Swine and Poultry Breeding Industry, Key Laboratory of Livestock and Poultry Multi-omics, Ministry of Agriculture and Rural Affairs, and Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China.
| |
Collapse
|
3
|
Nagasao J, Fukasawa H, Yoshioka K, Fujimura N, Kobayashi M, Tsunemi Y, Nomoto A, Mitsui S, Murata H, Yokoyama I, Komiya Y, Arihara K. Research Note: Expression of IGF-1 and IGF-1 Receptor Proteins in Skeletal Muscle Fiber Types in Chickens with Hepatic Fibrosis. Poult Sci 2022; 101:102045. [PMID: 35961253 PMCID: PMC9382560 DOI: 10.1016/j.psj.2022.102045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 11/28/2022] Open
Abstract
We investigated the expression of insulin-like growth factor 1 (IGF-1) and IGF-1 type 1 receptor (IGF-1R) in skeletal muscle fiber types in chickens with hepatic fibrosis induced by bile duct ligation (BDL). Eleven hens, approximately 104 weeks old, were randomly assigned to BDL (n = 4) and sham surgery (SHAM; n = 7) groups. In BDL hens, histopathology revealed marked bile duct proliferation and liver fibrosis. The cross-sectional area (CSA) of myofibers from both the pectoralis (PCT) muscles significantly decreased in the BDL group compared with the SHAM group (P < 0.01). In contrast, the CSA of myofibers from the femorotibialis lateralis (FTL) muscle did not decrease in the BDL group. Type I fibers were large, round, and hypertrophic. Elongated type IIA and IIB fibers were also present. For IGF-1 immunostaining, the immunoreaction intensity was higher in the PCT in the BDL group than the SHAM group. Within the BDL group, type I fibers from FTL had a stronger immunoreaction intensity than the type II fibers. For IGF-1R immunostaining, the intensity of the immunoreactions was similar within the PCT in the BDL group compared with the SHAM group. For FTL, type I fibers had stronger reactions to IGF-1R than type II fibers in the BDL group. These results suggest that type I fibers express both IGF-1 and IGF-1R and become hypertrophic in chickens with hepatic fibrosis.
Collapse
Affiliation(s)
- J Nagasao
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan.
| | - H Fukasawa
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - K Yoshioka
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - N Fujimura
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - M Kobayashi
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - Y Tsunemi
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - A Nomoto
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - S Mitsui
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - H Murata
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - I Yokoyama
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - Y Komiya
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| | - K Arihara
- Laboratory of Food Function and Safety, School of Veterinary Medicine, Kitasato University, Aomori 034-8628, Japan
| |
Collapse
|
4
|
Ellestad LE, Cogburn LA, Simon J, Le Bihan-Duval E, Aggrey SE, Byerly MS, Duclos MJ, Porter TE. Transcriptional profiling and pathway analysis reveal differences in pituitary gland function, morphology, and vascularization in chickens genetically selected for high or low body weight. BMC Genomics 2019; 20:316. [PMID: 31023219 PMCID: PMC6482517 DOI: 10.1186/s12864-019-5670-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 04/08/2019] [Indexed: 12/15/2022] Open
Abstract
Background Though intensive genetic selection has led to extraordinary advances in growth rate and feed efficiency in production of meat-type chickens, endocrine processes controlling these traits are still poorly understood. The anterior pituitary gland is a central component of the neuroendocrine system and plays a key role in regulating important physiological processes that directly impact broiler production efficiency, though how differences in pituitary gland function contribute to various growth and body composition phenotypes is not fully understood. Results Global anterior pituitary gene expression was evaluated on post-hatch weeks 1, 3, 5, and 7 in male broiler chickens selected for high (HG) or low (LG) growth. Differentially expressed genes (DEGs) were analyzed with gene ontology categorization, self-organizing maps, gene interaction network determination, and upstream regulator identification to uncover novel pituitary genes and pathways contributing to differences in growth and body composition. A total of 263 genes were differentially expressed between HG and LG anterior pituitary glands (P ≤ 0.05 for genetic line-by-age interaction or main effect of line; ≥1.6-fold difference between lines), including genes encoding four anterior pituitary hormones. Genes involved in signal transduction, transcriptional regulation, and vesicle-mediated transport were differentially expressed and are predicted to influence expression and secretion of pituitary hormones. DEGs involved in immune regulation provide evidence that inflammation and response to cellular stressors may compromise pituitary function in LG birds, affecting their ability to adequately produce pituitary hormones. Many DEGs were also predicted to function in processes that regulate organ morphology and angiogenesis, suggesting pituitary gland structure differs between the divergently selected lines. Conclusions The large number of DEGs within the anterior pituitary gland of birds selected for high or low body weight highlights the importance of this gland in regulating economically important traits such as growth and body composition in broiler chickens. Intracellular signaling, transcriptional regulation, and membrane trafficking are important cellular processes contributing to proper hormone production and secretion. The data also suggest that pituitary function is intimately tied to structure, and organization of the gland could influence hypothalamic and systemic metabolic inputs and delivery of hormones regulating growth and metabolism into peripheral circulation. Electronic supplementary material The online version of this article (10.1186/s12864-019-5670-9) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Laura E Ellestad
- Department of Poultry Science, University of Georgia, Athens, GA, 30602, USA.,Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Larry A Cogburn
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, 19716, USA
| | - Jean Simon
- Biologie des Oiseaux et Aviculture, Institut National de la Recherche Agronomique (INRA), Université de Tours, UR83 Recherches Avicoles, 37380, Nouzilly, France
| | - Elisabeth Le Bihan-Duval
- Biologie des Oiseaux et Aviculture, Institut National de la Recherche Agronomique (INRA), Université de Tours, UR83 Recherches Avicoles, 37380, Nouzilly, France
| | - Samuel E Aggrey
- Department of Poultry Science, University of Georgia, Athens, GA, 30602, USA
| | - Mardi S Byerly
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - Michel J Duclos
- Biologie des Oiseaux et Aviculture, Institut National de la Recherche Agronomique (INRA), Université de Tours, UR83 Recherches Avicoles, 37380, Nouzilly, France
| | - Tom E Porter
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA.
| |
Collapse
|
5
|
Resnyk CW, Carré W, Wang X, Porter TE, Simon J, Le Bihan-Duval E, Duclos MJ, Aggrey SE, Cogburn LA. Transcriptional analysis of abdominal fat in chickens divergently selected on bodyweight at two ages reveals novel mechanisms controlling adiposity: validating visceral adipose tissue as a dynamic endocrine and metabolic organ. BMC Genomics 2017; 18:626. [PMID: 28814270 PMCID: PMC5559791 DOI: 10.1186/s12864-017-4035-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 08/08/2017] [Indexed: 11/10/2022] Open
Abstract
Background Decades of intensive genetic selection in the domestic chicken (Gallus gallus domesticus) have enabled the remarkable rapid growth of today’s broiler (meat-type) chickens. However, this enhanced growth rate was accompanied by several unfavorable traits (i.e., increased visceral fatness, leg weakness, and disorders of metabolism and reproduction). The present descriptive analysis of the abdominal fat transcriptome aimed to identify functional genes and biological pathways that likely contribute to an extreme difference in visceral fatness of divergently selected broiler chickens. Methods We used the Del-Mar 14 K Chicken Integrated Systems microarray to take time-course snapshots of global gene transcription in abdominal fat of juvenile [1-11 weeks of age (wk)] chickens divergently selected on bodyweight at two ages (8 and 36 wk). Further, a RNA sequencing analysis was completed on the same abdominal fat samples taken from high-growth (HG) and low-growth (LG) cockerels at 7 wk, the age with the greatest divergence in body weight (3.2-fold) and visceral fatness (19.6-fold). Results Time-course microarray analysis revealed 312 differentially expressed genes (FDR ≤ 0.05) as the main effect of genotype (HG versus LG), 718 genes in the interaction of age and genotype, and 2918 genes as the main effect of age. The RNA sequencing analysis identified 2410 differentially expressed genes in abdominal fat of HG versus LG chickens at 7 wk. The HG chickens are fatter and over-express numerous genes that support higher rates of visceral adipogenesis and lipogenesis. In abdominal fat of LG chickens, we found higher expression of many genes involved in hemostasis, energy catabolism and endocrine signaling, which likely contribute to their leaner phenotype and slower growth. Many transcription factors and their direct target genes identified in HG and LG chickens could be involved in their divergence in adiposity and growth rate. Conclusions The present analyses of the visceral fat transcriptome in chickens divergently selected for a large difference in growth rate and abdominal fatness clearly demonstrate that abdominal fat is a very dynamic metabolic and endocrine organ in the chicken. The HG chickens overexpress many transcription factors and their direct target genes, which should enhance in situ lipogenesis and ultimately adiposity. Our observation of enhanced expression of hemostasis and endocrine-signaling genes in diminished abdominal fat of LG cockerels provides insight into genetic mechanisms involved in divergence of abdominal fatness and somatic growth in avian and perhaps mammalian species, including humans. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-4035-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- C W Resnyk
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, 19716, USA
| | - W Carré
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, 19716, USA.,Laboratoire de Génétique Moléculaire et Génomique, CHU Pontchaillou, 35033, Rennes, France
| | - X Wang
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, 19716, USA.,Department of Biological Sciences, Tennessee State University, Nashville, TN, 37209, USA
| | - T E Porter
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD, 20742, USA
| | - J Simon
- UR83 Recherches Avicoles, Institut National de la Recherche Agronomique (INRA), F-37380, Nouzilly, France
| | - E Le Bihan-Duval
- UR83 Recherches Avicoles, Institut National de la Recherche Agronomique (INRA), F-37380, Nouzilly, France
| | - M J Duclos
- UR83 Recherches Avicoles, Institut National de la Recherche Agronomique (INRA), F-37380, Nouzilly, France
| | - S E Aggrey
- Department of Poultry Science, University of Georgia, Athens, GA, 30602, USA
| | - L A Cogburn
- Department of Animal and Food Sciences, University of Delaware, Newark, DE, 19716, USA.
| |
Collapse
|
6
|
Gallagher PM, Touchberry CD, Teson K, McCabe E, Tehel M, Wacker MJ. Effects of an acute bout of resistance exercise on fiber-type specific GLUT4 and IGF-1R expression. Appl Physiol Nutr Metab 2013; 38:581-6. [DOI: 10.1139/apnm-2012-0301] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effects of resistance exercise on fiber-type–specific expression of insulin-like growth factor I receptor (IGF-1R) and glucose transporter 4 (GLUT4) was determined in 6 healthy males. The expression of both genes increased in Type I fibers (p < 0.05), but only GLUT4 increased (p < 0.05) in Type II fibers. These data demonstrates that an acute bout of resistance exercise can up-regulate mechanisms of glucose uptake in slow and fast-twitch fibers, but the IGF signaling axis may not be as effective in fast-twitch fibers.
Collapse
Affiliation(s)
- Philip M. Gallagher
- Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, KS 66045, USA
| | - Chad D. Touchberry
- Department of Basic Medical Science, University of Missouri-Kansas City, School of Medicine, Kansas City, MO 64108, USA
| | - Kelli Teson
- Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, KS 66045, USA
| | - Everlee McCabe
- Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, KS 66045, USA
| | - Michelle Tehel
- Department of Health, Sport, and Exercise Sciences, University of Kansas, Lawrence, KS 66045, USA
| | - Michael J. Wacker
- Department of Basic Medical Science, University of Missouri-Kansas City, School of Medicine, Kansas City, MO 64108, USA
| |
Collapse
|
7
|
Vaudin P, Dupont J, Duchêne S, Audouin E, Crochet S, Berri C, Tesseraud S. Phosphatase PTEN in chicken muscle is regulated during ontogenesis. Domest Anim Endocrinol 2006; 31:123-40. [PMID: 16307863 DOI: 10.1016/j.domaniend.2005.09.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2005] [Revised: 09/30/2005] [Accepted: 09/30/2005] [Indexed: 11/17/2022]
Abstract
The phosphatase and TENsin homolog deleted on chromosome 10 (PTEN) is a lipid and protein phosphatase able to inhibit significant actors of cell signaling (i.e. phosphatidylinositol-3'kinase and mitogen-activated protein kinase pathways). The aim of this study was to characterize PTEN and to investigate its regulation during ontogenesis in chicken muscle. Pectoralis major muscle was sampled on day 18 of the embryonic period (E18), at hatching (d0) and in fed chickens at 2, 7 and 43 days after hatching (d2, d7 and d43). We first cloned the totality of chicken PTEN cDNA; its translation into a putative protein showed more than 95% sequence identity with that characterized in mammals (humans, mice). PTEN was expressed under two major transcripts in the majority of tissues, including muscles where the expression of PTEN mRNA increased with age (P < 0.05). Surprisingly, the protein levels of PTEN (protein characterized with an apparent molecular weight of 55kDa) and its activity were considerably decreased between the E18 and d43 stages (approximately 8-10-fold reduction, P < 0.001). An association between these decreases and higher phosphorylation levels of two potential indirect downstream targets of phosphatase (i.e. AKT and ERK) was observed only in the early growth phases. It was concluded that phosphatase PTEN was expressed in chicken muscle and that its expression was regulated during ontogenesis.
Collapse
Affiliation(s)
- Pascal Vaudin
- Recherches Avicoles, Institut National de la Recherche Agronomique, 37380 Nouzilly, France
| | | | | | | | | | | | | |
Collapse
|
8
|
Urso ML, Fiatarone Singh MA, Ding W, Evans WJ, Cosmas AC, Manfredi TG. Exercise training effects on skeletal muscle plasticity and IGF-1 receptors in frail elders. AGE (DORDRECHT, NETHERLANDS) 2005; 27:117-125. [PMID: 23598617 PMCID: PMC3458497 DOI: 10.1007/s11357-005-1629-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2004] [Revised: 03/07/2005] [Accepted: 06/01/2005] [Indexed: 06/02/2023]
Abstract
Age-related sarcopenia inhibits mobility, increasing the risk for developing many diseases, including diabetes, arthritis, osteoporosis, and heart disease. Tissue plasticity, or the ability to regenerate following stress, has been a subject of question in aging humans. We assessed the impact of 10-weeks of resistance training on markers of skeletal muscle plasticity and insulin growth factor-1 (IGF-1) receptor density in a sub sample of subjects who, in an earlier study, demonstrated enhanced immunohistochemical labeling of IGF following resistance training. Muscle biopsies from the vastus lateralis of five elderly men and women were taken prior to and following 10 weeks of resistance training (N = 3) or a control period (N = 2). Immunogold labeling and quantitative electron microscopy techniques were used to analyze markers of IGF-1 receptor density and tissue plasticity. The experimental subjects showed a 161 ± 93.7% increase in Z band damage following resistance training. Myofibrillar central nuclei increased 296 ± 120% (P = 0. 029) in the experimental subjects. Changes in the percent of damaged Z bands were associated with alterations in the presence of central nuclei (r = 0.668; P = 0.0347). Post hoc analysis revealed that the relative pre/post percent changes in myofibrillar Z band damage and central nuclei were not statistically different between the control and exercise groups. Exercise training increased myofibrillar IGF-1 receptor densities in the exercise subjects (P = 0.008), with a non-significant increase in the control group. Labeling patterns suggested enhanced receptor density around the Z bands, sarcolemma, and mitochondrial and nuclear membranes. Findings from this study suggest that the age-related downregulation of the skeletal muscle IGF-1 system may be reversed to some extent with progressive resistance training. Furthermore, skeletal muscle tissue plasticity in the frail elderly is maintained at least to some extent as exemplified by the enhancement of IGF-1 receptor density and markers of tissue regeneration.
Collapse
Affiliation(s)
- Maria L. Urso
- Energy Metabolism Laboratory, University of Rhode Island, Kingston, RI 02881 USA
- Department of Exercise Science, University of Massachusetts, Amherst, MA 01003 USA
| | - Maria A. Fiatarone Singh
- Nutrition, Exercise Physiology, and Sarcopenia Laboratory, Jean Mayer United States Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111 USA
- School of Exercise and Sport Science, University of Sydney, Lidcombe, New South Whales 1825 Australia
| | - Wenjing Ding
- Nutrition, Exercise Physiology, and Sarcopenia Laboratory, Jean Mayer United States Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111 USA
| | - William J. Evans
- Donald W. Reynolds Department of Geriatrics and Geriatric Research, Education, and Clinical Center, University of Arkansas for Medical Sciences, Veterans Affairs Medical Center, Little Rock, AR 72114 USA
| | - Arthur C. Cosmas
- Allied Health Professions, University of Connecticut, Storrs, CT 06269 USA
| | - Thomas G. Manfredi
- Energy Metabolism Laboratory, University of Rhode Island, Kingston, RI 02881 USA
- Exercise Science, University of Rhode Island, 25 West Independence Way, Kingston, RI 02881 USA
| |
Collapse
|
9
|
Giachetto PF, Riedel EC, Gabriel JE, Ferro MIT, Di Mauro SMZ, Macari M, Ferro JA. Hepatic mRNA expression and plasma levels of insulin-like growth factor-I (IGF-I) in broiler chickens selected for different growth rates. Genet Mol Biol 2004. [DOI: 10.1590/s1415-47572004000100007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
10
|
Duclos MJ, Beccavin C, Simon J. Genetic models for the study of insulin-like growth factors (IGF) and muscle development in birds compared to mammals. Domest Anim Endocrinol 1999; 17:231-43. [PMID: 10527126 DOI: 10.1016/s0739-7240(99)00040-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
IGFs are important positive modulators of overall body and muscle growth in different species. Genetic variation in IGF-I gene expression exists as shown by the possibility of genetic selection for high or low circulating IGF-I concentrations in mice and the associated variations in growth potential. Targeted over-expression of IGF-I in transgenic mice results in muscle hypertrophy, but it is yet unknown whether genetic variability in muscle IGF-I gene expression exists. Much less data are available in birds. This review is focussed on the potential role of IGFs on chicken muscle development. Apart from the absence of a type 2 IGF receptor (IGF-II receptor), the general characteristics of the chicken IGF system seem to be similar to mammalian species. In different genetic models with altered growth rates or body composition, differences in the IGF system are observed suggesting its importance in regulating body growth in those species. The components for a paracrine action of IGF are also present in chicken muscle but it has not yet been demonstrated if they contribute to differences in muscle development.
Collapse
Affiliation(s)
- M J Duclos
- INRA, Station de Recherches Avicoles, Nouzilly, France.
| | | | | |
Collapse
|