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Bernardi O, Ramé C, Reverchon M, Dupont J. Expression of chemerin and its receptors in extra-embryonic annexes and role of chemerin and its GPR1 receptor in embryo development in layer and broiler hens. Poult Sci 2024; 103:103339. [PMID: 38118220 PMCID: PMC10753086 DOI: 10.1016/j.psj.2023.103339] [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: 10/01/2023] [Revised: 11/02/2023] [Accepted: 11/28/2023] [Indexed: 12/22/2023] Open
Abstract
Intensive genetic selection of broiler breeders and layer hens resulted in differences in the mechanisms of growth and also in cell metabolism during embryogenesis. Previous research has shown that an adipokine named chemerin and one of these receptors, CMKLR1 were potentially involved in broiler embryo development. Here, our objectives were 1) to compare the expression of chemerin and its receptors CMKLR1, GPR1, and CCRL2 and chemerin concentration in extra-embryonic annexes (allantoic and amniotic membranes and fluids and plasma) in broiler and layer fertile eggs during the development (embryonic day (ED) 7, 14, and 18) by RT-qPCR and specific chicken ELISA and 2) to investigate the role of chemerin and one of its receptors GPR1 in embryo development after in ovo injections of neutralizing antibodies against chicken chemerin and GPR1. We found that chemerin expression in amniotic membranes was higher in layer than broiler eggs at ED7 and ED14 whereas the expression of the 3 receptors was higher in layer than broiler in the allantoic membranes at ED14 and ED18. Chemerin concentration was more important in layer than broiler at ED14 and ED18 in amniotic liquid and at all the studied stages in blood plasma. We also showed positive correlation between amniotic chemerin concentration and chemerin amniotic membrane expression, chemerin plasma concentration and embryo body weight in both breeds. Finally, in ovo injection of chicken chemerin and GPR1 neutralizing antibodies increased embryo mortality in both layer and broiler eggs. Taken together, even if chemerin concentration and chemerin system expression in embryonic membranes are mainly higher expressed in layer than in broiler, chemerin potentially through GPR1 could promote embryo development in both breeds.
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Affiliation(s)
- Ophélie Bernardi
- French Poultry and Aquaculture Breeders Technical Center, Centre INRAE Val de Loire, F-37380 Nouzilly, France; National Centre for Scientific Research, French Horse and Riding Institute, National Research Institute for Agriculture, Food and Environment, Tours University, Physiology of Reproduction and Behaviors, UMR85, F-37380 Nouzilly, France
| | - Christelle Ramé
- National Centre for Scientific Research, French Horse and Riding Institute, National Research Institute for Agriculture, Food and Environment, Tours University, Physiology of Reproduction and Behaviors, UMR85, F-37380 Nouzilly, France
| | - Maxime Reverchon
- French Poultry and Aquaculture Breeders Technical Center, Centre INRAE Val de Loire, F-37380 Nouzilly, France
| | - Joëlle Dupont
- National Centre for Scientific Research, French Horse and Riding Institute, National Research Institute for Agriculture, Food and Environment, Tours University, Physiology of Reproduction and Behaviors, UMR85, F-37380 Nouzilly, France.
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Iqbal MA, Hadlich F, Reyer H, Oster M, Trakooljul N, Murani E, Perdomo‐Sabogal A, Wimmers K, Ponsuksili S. RNA-Seq-based discovery of genetic variants and allele-specific expression of two layer lines and broiler chicken. Evol Appl 2023; 16:1135-1153. [PMID: 37360029 PMCID: PMC10286233 DOI: 10.1111/eva.13557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/21/2023] [Accepted: 04/22/2023] [Indexed: 06/28/2023] Open
Abstract
Recent advances in the selective breeding of broilers and layers have made poultry production one of the fastest-growing industries. In this study, a transcriptome variant calling approach from RNA-seq data was used to determine population diversity between broilers and layers. In total, 200 individuals were analyzed from three different chicken populations (Lohmann Brown (LB), n = 90), Lohmann Selected Leghorn (LSL, n = 89), and Broiler (BR, n = 21). The raw RNA-sequencing reads were pre-processed, quality control checked, mapped to the reference genome, and made compatible with Genome Analysis ToolKit for variant detection. Subsequently, pairwise fixation index (F ST) analysis was performed between broilers and layers. Numerous candidate genes were identified, that were associated with growth, development, metabolism, immunity, and other economically significant traits. Finally, allele-specific expression (ASE) analysis was performed in the gut mucosa of LB and LSL strains at 10, 16, 24, 30, and 60 weeks of age. At different ages, the two-layer strains showed significantly different allele-specific expressions in the gut mucosa, and changes in allelic imbalance were observed across the entire lifespan. Most ASE genes are involved in energy metabolism, including sirtuin signaling pathways, oxidative phosphorylation, and mitochondrial dysfunction. A high number of ASE genes were found during the peak of laying, which were particularly enriched in cholesterol biosynthesis. These findings indicate that genetic architecture as well as biological processes driving particular demands relate to metabolic and nutritional requirements during the laying period shape allelic heterogeneity. These processes are considerably affected by breeding and management, whereby elucidating allele-specific gene regulation is an essential step towards deciphering the genotype to phenotype map or functional diversity between the chicken populations. Additionally, we observed that several genes showing significant allelic imbalance also colocalized with the top 1% of genes identified by the FST approach, suggesting a fixation of genes in cis-regulatory elements.
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Affiliation(s)
| | - Frieder Hadlich
- Research Institute for Farm Animal BiologyInstitute of Genome BiologyDummerstorfGermany
| | - Henry Reyer
- Research Institute for Farm Animal BiologyInstitute of Genome BiologyDummerstorfGermany
| | - Michael Oster
- Research Institute for Farm Animal BiologyInstitute of Genome BiologyDummerstorfGermany
| | - Nares Trakooljul
- Research Institute for Farm Animal BiologyInstitute of Genome BiologyDummerstorfGermany
| | - Eduard Murani
- Research Institute for Farm Animal BiologyInstitute of Genome BiologyDummerstorfGermany
| | | | - Klaus Wimmers
- Research Institute for Farm Animal BiologyInstitute of Genome BiologyDummerstorfGermany
- Faculty of Agricultural and Environmental SciencesUniversity RostockRostockGermany
| | - Siriluck Ponsuksili
- Research Institute for Farm Animal BiologyInstitute of Genome BiologyDummerstorfGermany
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Sun H, Chen Z, Ma C, Lian L, Zhao Z, Niu S, Xu L, Sun J. Effects of maternal dietary energy restriction on laying performance, embryonic development, and lipid Metabolism in broilers. Anim Biosci 2021; 35:698-710. [PMID: 34727634 PMCID: PMC9065775 DOI: 10.5713/ab.21.0301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 10/19/2021] [Indexed: 11/27/2022] Open
Abstract
Objective The objective of this study was to investigate the effects of different degrees of maternal dietary energy restriction on lipid deposition in embryonic tissues during the medium laying period (37 to 39 weeks) in Arbor Acres (AA) broiler breeders. Methods A single factor design was adopted, and 400 AA broiler breeders (20 weeks of age) with a similar weight were randomly allocated into four groups. The birds in the control group were fed a corn-soybean meal based diet, and those in trial groups were fed diets with 80%, 70%, and 50% energy levels of the basal diet. Incubated eggs from the medium laying period were collected. Samples of developing embryos at various stages were prepared for composition analysis. Results The embryo weight in the 80% energy group was higher than those of the other groups on embryonic day (E) 13, but at 21 E, they were significantly decreased with decreasing energy intake of the broiler breeders (p<0.05). Additionally, the levels of crude fat in tissues in the restriction groups were significantly decreased (p<0.05). The long axis and area of adipocytes in breast muscle, thigh muscle and the liver were significantly decreased (p<0.05) at 21 E in the 80%, 70%, and 50% energy groups. Conclusion The effects of the 80% maternal dietary energy restriction energy affects egg production performance, egg quality, and nutrient deposition in egg weights, which then directly impacts on the developmental process of embryos, especially on fat utilization and deposition.
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Affiliation(s)
- Hao Sun
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
| | - Zhihui Chen
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
| | - Chenzhan Ma
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
| | - Lina Lian
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
| | - Zeyu Zhao
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
| | - Shupeng Niu
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
| | - Liangmei Xu
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
| | - Jinhua Sun
- College of Animal Science and Technology, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin, Heilongjiang, China
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Ben-Gigi R, Haron A, Shinder D, Ruzal M, Druyan S. Differential physiological response of slow- and fast-growing broiler lines to hypoxic conditions during chorioallantoic membrane development. Poult Sci 2021; 100:1192-1204. [PMID: 33518077 PMCID: PMC7858093 DOI: 10.1016/j.psj.2020.10.068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 10/14/2020] [Accepted: 10/19/2020] [Indexed: 11/21/2022] Open
Abstract
Ambient conditions during chicken embryogenesis, such as insufficient oxygen or changes in temperature, are expected to cause permanent phenotypic changes and affect their posthatch performance. Decades of genetic selection for high growth rate resulted with various physiological and morphological changes that can affect the broiler fitness under environmental stress. To evaluate the selection effect on responses to environmental challenge during embryonic development, and the long-term implications, we have used a unique genetic line, that was not selected for over 30 yr (since 1986), as control for the modern commercial genetic line. At embryonic day 5 (E5), broiler embryos from these 2 genetic lines were divided into 2 treatments: 1) control; 2) 15% O2 concentration for 12 h/day from E5 through E12 the embryonic period of chorioallantoic membrane formation. Embryos and hatched chicks were characterized for physiological and morphological parameters. Significant differences in relative embryo weight and yolk consumption were found between the 2 lines. The modern line was characterized by a higher metabolic rate and rapid growth, supported by higher hemoglobin levels and hematocrit concentrations, whereas the 1986 line had slower metabolism, lower levels of hematocrit and hemoglobin, higher oxygen volume per 1 g of embryonic tissue indicating higher oxygen availability. Both lines exhibited changes in heart rate, and blood parameters corresponding to cardiovascular system adaptation after hypoxic exposure, seemingly implemented to increase oxygen-carrying capacity to the embryo tissues. Our finding stand in agreement that the genetic selection for high growth rate that led to higher metabolism without a fit of the cardiovascular system, increased the imbalance between oxygen supply and demand.
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Affiliation(s)
- R Ben-Gigi
- Institute of Animal Science, Agricultural Research Organization, Volcani Center, Rishon Le Tsiyon 7528809, Israel; Faculty of Agriculture Food and Environment, The Hebrew University, Rehovot 76100, Israel
| | - A Haron
- Institute of Animal Science, Agricultural Research Organization, Volcani Center, Rishon Le Tsiyon 7528809, Israel; Faculty of Agriculture Food and Environment, The Hebrew University, Rehovot 76100, Israel
| | - D Shinder
- Institute of Animal Science, Agricultural Research Organization, Volcani Center, Rishon Le Tsiyon 7528809, Israel
| | - M Ruzal
- Institute of Animal Science, Agricultural Research Organization, Volcani Center, Rishon Le Tsiyon 7528809, Israel
| | - S Druyan
- Institute of Animal Science, Agricultural Research Organization, Volcani Center, Rishon Le Tsiyon 7528809, Israel.
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Faure M, Guibert E, Crochet S, Chartrin P, Brillard JP, Collin A, Froment P. Differential proliferation and metabolic activity of Sertoli cells in the testes of broiler and layer breeder chickens. Poult Sci 2017; 96:2459-2470. [DOI: 10.3382/ps/pex025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Indexed: 12/17/2022] Open
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Buzala M, Janicki B. Review: Effects of different growth rates in broiler breeder and layer hens on some productive traits. Poult Sci 2016; 95:2151-9. [PMID: 27194733 DOI: 10.3382/ps/pew173] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2016] [Indexed: 12/26/2022] Open
Abstract
Genetic selection that has been carried out for several dozen years has led to significant progress in poultry production by improving productive traits and increasing the profitability of broiler breeder and layer hen production. After hatching, broilers and layers differ mainly in feed intake, growth rate, efficiency of nutrient utilization, and development of muscles and adipose tissue. A key role can be played by hormonal mechanisms of appetite control in broilers and layers. The paper discusses the consequences of different growth rates resulting from long-term genetic selection on feed intake, efficiency of nutrient utilization, and development of muscles and adipose tissue, with particular consideration of the hormonal mechanisms of appetite control in broilers and layers. The information presented in this review paper shows that it would be worth comparing these issues in a meta-analysis.
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Affiliation(s)
- M Buzala
- Department of Animal Biochemistry and Biotechnology, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, Poland
| | - B Janicki
- Department of Animal Biochemistry and Biotechnology, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, Poland
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Ren Z, Jiang S, Zeng Q, Ding X, Bai S, Wang J, Luo Y, Su Z, Xuan Y, Yao B, Cisneros F, Zhang K. Effect of dietary canthaxanthin and 25-hydroxycholecalciferol supplementation on the performance of duck breeders under two different vitamin regimens. J Anim Sci Biotechnol 2016; 7:2. [PMID: 26807215 PMCID: PMC4724121 DOI: 10.1186/s40104-016-0062-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 01/11/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dietary canthaxanthin (CX), 25-hydroxycholecalciferol (25-OH-D 3 ) and vitamins have been widely reported to be involved in productive and reproductive performance of broiler breeders. However, limited information is available for duck breeders. In this study, a total of 1,560 Cherry Valley SM3 duck breeder females and 312 males were used to assess if the addition of CX and 25-OH-D3 could increase the performance of duck breeders under two different dietary vitamin regimens. Four diets were used under a 2 × 2 factorial arrangement with 2 kinds of vitamin premixes (REGULAR and HIGH; HIGH premix had higher levels of all vitamins except K3 than REGULAR premix), and with or without the supplementation of the mixture of CX (6 mg/kg) and 25-OH-D3 (0.069 mg/kg). The ducks were fed ad libitum with pelleted diets based on corn-soybean meal from 38 to 77 wk of age. RESULTS HIGH vitamin premix decreased malondialdehyde (MDA) level (P < 0.001) of egg yolk, increased hatchability of fertile eggs (P = 0.029), increased hatchability of total eggs (P = 0.029), and decreased serum protein carbonyl level (P = 0.037) of breeder males. The mixture of CX and 25-OH-D3 increased serum calcium of breeder females (P = 0.010), decreased the cracked egg rate (P = 0.001), increased the pigmentation of egg yolk (P < 0.001) and male bill (P < 0.001), and decreased MDA level of egg yolk (P < 0.001) and male serum (P = 0.034). Interactive effects were observed in cracked egg rate (P = 0.038), shell thickness (P = 0.011) and serum phosphorus (P = 0.026) of breeder females. HIGH vitamin premix together with the mixture of CX and 25-OH-D3 decreased cracked egg rate and increased shell thickness of duck breeders. Serum phosphorus was decreased in duck breeder females fed REGULAR vitamin premix without the addition of the CX and 25-OH-D3 mixture. CONCLUSIONS Dietary HIGH vitamin premix increased antioxidant status of eggs and breeder males, and increased hatchability. The mixture of CX and 25-OH-D3 enhanced egg shell quality, and promoted pigmentation and antioxidant status of eggs and breeder males.
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Affiliation(s)
- Zhouzheng Ren
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Shizhen Jiang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Qiufeng Zeng
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Xuemei Ding
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Shiping Bai
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Jianping Wang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Yuheng Luo
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Zhuowei Su
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Yue Xuan
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
| | - Bing Yao
- DSM (China) Ltd., PuDong New Area 201203, Shanghai, P. R. China
| | - Fernando Cisneros
- DSM Nutritional Products Ltd., Animal Nutrition & Health, Wurmisweg 4303, Kaiseraugst, Switzerland
| | - Keying Zhang
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Institute of Animal Nutrition, Sichuan Agricultural University, Chengdu, 611130 Sichuan China
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Buzała M, Janicki B, Czarnecki R. Consequences of different growth rates in broiler breeder and layer hens on embryogenesis, metabolism and metabolic rate: A review. Poult Sci 2015; 94:728-33. [PMID: 25691756 DOI: 10.3382/ps/pev015] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Intensive genetic selection of broiler breeders and layer hens for economically important production traits, which has been carried out for almost a century, resulted in considerable differences in the mechanisms of growth and development and, thus, in avian metabolism, both during embryogenesis and after hatching. Selection for meat production (broiler breeders) and eggs (layer hens) led to increased productivity but also brought about metabolic disorders. That intensive genetic selection of broiler breeders and layer hens is effective is seen, for example, in the differences in growth and development, metabolism of the yolk sac, hormones and lipids, gas exchange, and thermogenesis. Due to genetic proximity and different developmental mechanisms in broiler breeders and layer hens, avian embryos and chicks serve as excellent models for fundamental scientific research. This review paper discusses the consequences of different growth rates as a result of long-term genetic selection on embryonic development and metabolic rate of broilers and layers. The evidence presented herein indicates that it would be worth comparing these issues in a meta-analysis.
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Affiliation(s)
- M Buzała
- Department of Animal Biochemistry and Biotechnology
| | - B Janicki
- Department of Animal Biochemistry and Biotechnology
| | - R Czarnecki
- Department of Poultry Breeding and Animal Products Evaluation, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, Poland
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Richards MP, Proszkowiec-Weglarz M, Rosebrough RW, McMurtry JP, Angel R. Effects of early neonatal development and delayed feeding immediately post-hatch on the hepatic lipogenic program in broiler chicks. Comp Biochem Physiol B Biochem Mol Biol 2010; 157:374-88. [DOI: 10.1016/j.cbpb.2010.08.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Revised: 08/18/2010] [Accepted: 08/26/2010] [Indexed: 10/19/2022]
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Zhao S, Ma H, Huang G, Zou S. Hepatic lipolysis in broiler chickens with different fat deposition during embryonic development. Res Vet Sci 2010; 88:321-5. [DOI: 10.1016/j.rvsc.2009.07.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Revised: 05/06/2009] [Accepted: 07/21/2009] [Indexed: 10/20/2022]
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Changes in Carnosine and its Related Constituents during Embryonic Development in the Breast Muscle of Layer and Broiler Chickens. J Poult Sci 2009. [DOI: 10.2141/jpsa.46.229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Sato M, Sato K, Furuse M. Change in hepatic and plasma bile acid contents and its regulatory gene expression in the chicken embryo. Comp Biochem Physiol B Biochem Mol Biol 2008; 150:344-7. [PMID: 18499494 DOI: 10.1016/j.cbpb.2008.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Revised: 04/09/2008] [Accepted: 04/09/2008] [Indexed: 10/22/2022]
Abstract
To investigate changes in bile acid biosynthesis in chicken (Gallus gallus) during embryonic stages, we studied the contribution of hepatic and plasma total bile acid levels, mRNA expression of cholesterol 7 alpha-hydroxylase (CYP7A1), and the expression of its regulatory genes in two embryo models (i.e., broilers and layers) differing in lipid metabolism. Total bile acid levels in plasma and liver were low during embryonic stages, as well as expression of CYP7A1. At hatch (P0), hepatic and plasma total bile acid levels and CYP7A1 mRNA expression in liver were markedly increased in both models. The hepatic mRNA expression of liver X receptor (LXR)alpha, a regulator of CYP7A1 gene expression gradually decreased with developmental stages of both broilers and layers. The hepatic mRNA expression of farnesoid X receptor (FXR), a repressor of CYP7A1 gene expression, also decreased with embryonic development. The present results showed that the mRNA expression of CYP7A1 and synthesis of bile acids was low in embryonic stages, suggesting that FXR might be a key regulator of CYP7A1 gene expression in the chicken embryo.
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Affiliation(s)
- Momoka Sato
- Laboratory of Advanced Animal and Marine Bioresources, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Fukuoka, Japan
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SATO M, NODA K, KINO K, NAKAMURA A, FURUSE M. Comparison of heat production and plasma lipid metabolites between meat- and egg-types of Nagoya breed chicken during embryonic development. Anim Sci J 2007. [DOI: 10.1111/j.1740-0929.2007.00482.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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