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Pan S, Zhang L, Liu Z, Xing H. Myostatin suppresses adipogenic differentiation and lipid accumulation by activating crosstalk between ERK1/2 and PKA signaling pathways in porcine subcutaneous preadipocytes. J Anim Sci 2021; 99:6388060. [PMID: 34634123 DOI: 10.1093/jas/skab287] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/09/2021] [Indexed: 11/14/2022] Open
Abstract
The current study was undertaken to determine the effect of myostatin (MSTN) on lipid accumulation in porcine subcutaneous preadipocytes (PSPAs) and to further explore the potential molecular mechanisms. PSPAs isolated from Meishan weaned piglets were added with various concentrations of MSTN recombinant protein during the entire period of adipogenic differentiation process. Results showed that MSTN treatment significantly reduced the lipid accumulation, intracellular triglyceride (TG) content, glucose consumption and glycerol phosphate dehydrogenase activity, while increased glycerol and free fatty acid release. Consistent with above results, the extracellular signal-regulated kinase 1/2 (ERK1/2) pathway was obviously activated and thus key adipogenic transcription factors peroxisome proliferator-activated receptor-gamma (PPAR-γ), CCAAT/enhancer-binding protein-alpha (C/EBP-α) and their downstream engymes fatty acid synthase and acetyl-CoA carboxylase were all inhibited. However, chemical inhibition of ERK1/2 signaling pathway by PD98059 markedly reversed the decreased TG content by increasing PPAR-γ expression. In addition, MSTN activated the cyclic AMP/protein kinase A (cAMP/PKA) pathway and stimulated lipolysis by reducing the expression of antilipolytic gene perilipin, thus elevated key lipolytic enzymes adipose triglyceride lipase and hormone-sensitive lipase expression and enzyme activity. On the contrary, pretreatment with PKA inhibitor H89 significantly reversed TG accumulation by increasing PPAR-γ expression and thus inhibiting ERK1/2, perilipin and HSL phosphorylation, supporting the crosstalk between PKA and ERK1/2 pathways in both the anti-adipogenic and pro-lipolytic effects. In summary, our results suggested that MSTN suppressed adipogenesis and stimulated lipolysis, which was mainly mediated by activating crosstalk of ERK1/2 and PKA signaling pathways, and consequently decreased lipid accumulation in PSPAs, our findings may provide novel insights for further exploring MSTN as a potent inhibitor of porcine subcutaneous lipid accumulation.
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Affiliation(s)
- Shifeng Pan
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, P. R. China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, P. R. China.,Department of Animal Sciences, Washington State University, Pullman, WA, USA
| | - Lin Zhang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, P. R. China
| | - Zhuang Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, P. R. China
| | - Hua Xing
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, P. R. China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, P. R. China
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Zhao C, Wu H, Chen P, Yi B, Ma Y, Deng K. MAT2A/2B promote porcine intramuscular preadipocyte proliferation through ERK signaling pathway. Anim Sci J 2019; 90:1278-1286. [PMID: 31293025 DOI: 10.1111/asj.13264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 05/12/2019] [Accepted: 06/03/2019] [Indexed: 12/22/2022]
Abstract
Intramuscular fat (IMF) content has been identified as a crucial factor of porcine meat quality. MAT2A and MAT2B coordinately catalyzes the synthesis of the major biological methyl donor S-adenosylmethionine (SAMe). However, the regulatory effect of MAT2A and MAT2B on porcine intramuscular preadipocyte proliferation has not been clarified. In this study, we investigated the effect of MAT2A and MAT2B and its potential mechanism during porcine intramuscular proliferation. We demonstrated that overexpression of MAT2A and MAT2B promoted the cell cycle progression of porcine preadipocyte by flow cytometry and EdU-labeling assay, as well as promoted the expression of cell cycle marker genes including Cyclin B, Cyclin D, and Cyclin-dependent kinase 4, but reduced the expression of cell cycle inhibitor P27. Consistently, knockdown of MAT2A and MAT2B inhibited cell cycle progression and downregulated the mRNA and protein levels of the above genes. Furthermore, overexpression of MAT2A and MAT2B activated the phosphorylation of ERK1/2. Moreover, the inhibitory effect of U0126 (a specific ERK1/2 inhibitor) on the ERK1/2 activities was partially recovered by overexpression of MAT2A and MAT2B in porcine intramuscular preadipocytes. Taken together, our findings suggested that MAT2A and MAT2B promote porcine preadipocyte proliferation by ERK1/2 signaling pathway.
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Affiliation(s)
- Cunzhen Zhao
- Laboratory of Animal Biotechnology and Breeding, College of Animal Science and Veterinary Medicine, Xinyang College of Agriculture and Forestry, Xinyang, Henan, China
| | - Haigang Wu
- Laboratory of Animal Biotechnology and Breeding, College of Animal Science and Veterinary Medicine, Xinyang College of Agriculture and Forestry, Xinyang, Henan, China
| | - Peirong Chen
- Laboratory of Animal Biotechnology and Breeding, College of Animal Science and Veterinary Medicine, Xinyang College of Agriculture and Forestry, Xinyang, Henan, China
| | - Benchi Yi
- Laboratory of Animal Biotechnology and Breeding, College of Animal Science and Veterinary Medicine, Xinyang College of Agriculture and Forestry, Xinyang, Henan, China
| | - Yun Ma
- College of Life Science, Xinyang Normal University, Xinyang, Henan, China
| | - Kaiwei Deng
- Laboratory of Animal Biotechnology and Breeding, College of Animal Science and Veterinary Medicine, Xinyang College of Agriculture and Forestry, Xinyang, Henan, China
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Zhou Q, Sun W, Liu X, Wang X, Xiao Y, Bi D, Yin J, Shi D. Third-Generation Sequencing and Analysis of Four Complete Pig Liver Esterase Gene Sequences in Clones Identified by Screening BAC Library. PLoS One 2016; 11:e0163295. [PMID: 27695062 PMCID: PMC5047458 DOI: 10.1371/journal.pone.0163295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 09/05/2016] [Indexed: 11/18/2022] Open
Abstract
AIM Pig liver carboxylesterase (PLE) gene sequences in GenBank are incomplete, which has led to difficulties in studying the genetic structure and regulation mechanisms of gene expression of PLE family genes. The aim of this study was to obtain and analysis of complete gene sequences of PLE family by screening from a Rongchang pig BAC library and third-generation PacBio gene sequencing. METHODS After a number of existing incomplete PLE isoform gene sequences were analysed, primers were designed based on conserved regions in PLE exons, and the whole pig genome used as a template for Polymerase chain reaction (PCR) amplification. Specific primers were then selected based on the PCR amplification results. A three-step PCR screening method was used to identify PLE-positive clones by screening a Rongchang pig BAC library and PacBio third-generation sequencing was performed. BLAST comparisons and other bioinformatics methods were applied for sequence analysis. RESULTS Five PLE-positive BAC clones, designated BAC-10, BAC-70, BAC-75, BAC-119 and BAC-206, were identified. Sequence analysis yielded the complete sequences of four PLE genes, PLE1, PLE-B9, PLE-C4, and PLE-G2. Complete PLE gene sequences were defined as those containing regulatory sequences, exons, and introns. It was found that, not only did the PLE exon sequences of the four genes show a high degree of homology, but also that the intron sequences were highly similar. Additionally, the regulatory region of the genes contained two 720bps reverse complement sequences that may have an important function in the regulation of PLE gene expression. SIGNIFICANCE This is the first report to confirm the complete sequences of four PLE genes. In addition, the study demonstrates that each PLE isoform is encoded by a single gene and that the various genes exhibit a high degree of sequence homology, suggesting that the PLE family evolved from a single ancestral gene. Obtaining the complete sequences of these PLE genes provides the necessary foundation for investigation of the genetic structure, function, and regulatory mechanisms of the PLE gene family.
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Affiliation(s)
- Qiongqiong Zhou
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
- Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Wenjuan Sun
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agriculture University, Beijing, China
| | - Xiyan Liu
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
- Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Xiliang Wang
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
- Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Yuncai Xiao
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
- Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Dingren Bi
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
- Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Jingdong Yin
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agriculture University, Beijing, China
| | - Deshi Shi
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
- Key Laboratory of Development of Veterinary Diagnostic Products of Ministry of Agricultural, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
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MAT2B promotes adipogenesis by modulating SAMe levels and activating AKT/ERK pathway during porcine intramuscular preadipocyte differentiation. Exp Cell Res 2016; 344:11-21. [PMID: 26940012 DOI: 10.1016/j.yexcr.2016.02.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 02/23/2016] [Accepted: 02/26/2016] [Indexed: 12/31/2022]
Abstract
Intramuscular fat (IMF) has been demonstrated as one of the crucial factors of livestock meat quality. The MAT2B protein with MAT2α catalyzes the formation of methyl donor S- adenosylmethionine (SAMe) to mediate cell metabolism including proliferation and apoptosis. However, the regulatory effect of MAT2B on IMF deposition is still unclear. In this study, the effect of MAT2B on adipogenesis and its potential mechanism during porcine intramuscular preadipocyte differentiation was studied. The results showed that overexpression of MAT2B promoted adipogenesis and significantly up-regulated the mRNA and protein levels of adipogenic marker genes including FASN, PPARγ and aP2, consistently, knockdown of MAT2B inhibited lipid accumulation and down-regulated the mRNA and protein levels of the above genes. Furthermore, flow cytometry and EdU-labeling assay indicated that MAT2B regulate adipogenesis was partly due to influence intracellular SAMe levels and further affect cell clonal expansion. Also, increased expression of MAT2B activated the phosphorylations of AKT and ERK1/2, whereas knockdown of MAT2B blocked AKT signaling and repressed the phosphorylation of ERK1/2. Moreover, the inhibitory effect of LY294002 (a specific PI3K inhibitor) on the activities of AKT and ERK1/2 was partially recovered by overexpression of MAT2B in porcine intramuscular adipocytes. Finally, Co-IP experiments showed that MAT2B can directly interact with AKT. Taken together, our findings suggested that MAT2B acted as a positive regulator through modifying SAMe levels as well as activating AKT/ERK signaling pathway to promote porcine intramuscular adipocyte differentiation.
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Construction and preliminary characterization analysis of Wuzhishan miniature pig bacterial artificial chromosome library with approximately 8-fold genome equivalent coverage. BIOMED RESEARCH INTERNATIONAL 2013; 2013:587493. [PMID: 23691508 PMCID: PMC3652137 DOI: 10.1155/2013/587493] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Accepted: 03/22/2013] [Indexed: 11/18/2022]
Abstract
Bacterial artificial chromosome (BAC) libraries have been invaluable tools for the genome-wide genetic dissection of complex organisms. Here, we report the construction and characterization of a high-redundancy BAC library from a very valuable pig breed in China, Wuzhishan miniature pig (Sus scrofa), using its blood cells and fibroblasts, respectively. The library contains approximately 153,600 clones ordered in 40 superpools of 10 × 384-deep well microplates. The average insert size of BAC clones was estimated to be 152.3 kb, representing approximately 7.68 genome equivalents of the porcine haploid genome and a 99.93% statistical probability of obtaining at least one clone containing a unique DNA sequence in the library. 19 pairs of microsatellite marker primers covering porcine chromosomes were used for screening the BAC library, which showed that each of these markers was positive in the library; the positive clone number was 2 to 9, and the average number was 7.89, which was consistent with 7.68-fold coverage of the porcine genome. And there were no significant differences of genomic BAC library from blood cells and fibroblast cells. Therefore, we identified 19 microsatellite markers that could potentially be used as genetic markers. As a result, this BAC library will serve as a valuable resource for gene identification, physical mapping, and comparative genomics and large-scale genome sequencing in the porcine.
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Stafuzza NB, Abbey CA, Gill CA, Womack JE, Amaral MEJ. Construction and preliminary characterization of a river buffalo bacterial artificial chromosome library. GENETICS AND MOLECULAR RESEARCH 2012; 11:3013-9. [PMID: 22653673 DOI: 10.4238/2012.may.22.6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
River buffalo genome analyses have advanced significantly in the last decade, and the genome sequence of Bubalus bubalis will be available shortly. Nonetheless, large-insert DNA library resources such as bacterial artificial chromosomes (BAC) are still required for validation and accurate assembly of the genome sequence. We constructed a river buffalo BAC library containing 52,224 clones with an average insert size of 97 kb, representing 1.7 × coverage of the genome. This genomic resource for river buffalo will facilitate further studies in this economically important species allowing for instance, whole genome physical mapping and isolation of genes and gene clusters, contributing to the elucidation of gene organization and identification of regulatory elements.
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Affiliation(s)
- N B Stafuzza
- Departamento de Biologia, Instituto de Biociências, Letras e Ciências Exatas, Universidade Estadual de São Paulo "Júlio de Mesquita Filho", São José do Rio Preto, SP, Brazil
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Construction and characterization of a high coverage cashmere goat BAC library containing cashmere-associated genes. Small Rumin Res 2012. [DOI: 10.1016/j.smallrumres.2011.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wang Q, Ji C, Huang J, Yang F, Zhang H, Liu L, Yin J. The mRNA of lipin1 and its isoforms are differently expressed in the longissimus dorsi muscle of obese and lean pigs. Mol Biol Rep 2010; 38:319-25. [PMID: 20358298 DOI: 10.1007/s11033-010-0110-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2009] [Accepted: 03/16/2010] [Indexed: 10/19/2022]
Abstract
Lipin1 has been documented to play an important role in adipogenesis. In the present study, the mRNA expression level of lipin1 and its isoforms in longissimus dorsi muscle were determined by semi-quantification RT-PCR in lean PIC and obese Rongchang pigs. Further, we determined mRNA expression for lipin1 and its two isoforms in Rongchang obese pigs which had either a high or low intramuscular fat content. We demonstrate for the first time that porcine lipin1 has two alternative forms, lipin-α and lipin-β. Unlike mice and humans where the lipin-β has 99 more nucleotides than lipin-α, we found that in swine, lipin-β has 108 more nucleotides than lipin-α. Our results indicate that the longissimus dorsi muscle of Rongchang obese pigs have a higher level of mRNA expression for lipin1 and its isoforms than PIC lean pigs. Furthermore, Rongchang pigs with higher intramuscular fat content had a higher lipin1 and lipin-β mRNA expression in longissimus dorsisi muscle than Rongchang pigs with lower intramuscular fat content (P<0.05), whereas no difference was seen in lipin-α mRNA expression between Rongchang pigs with high or low intramuscular fat. The ratio of lipin-β mRNA to lipin-α mRNA was also significantly different between Rongchang pigs distinguished by a high intramuscular fat content compared with those with low intramuscular fat (P<0.05). These data suggested that the lipin1 gene may have a crucial effect on body lipid accumulation in pigs, whereas the lipin-β isoform may play an important role in intramuscular fat deposition in obese pigs.
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Affiliation(s)
- Qiang Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science, China Agricultural University, No. 2. Yuanmingyuan West Road, Beijing, 100193, People's Republic of China
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