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Guo PP, Yao XR, Xu YN, Jin X, Li Q, Yan CG, Kim NH, Li XZ. Insulin interacts with PPARγ agonists to promote bovine adipocyte differentiation. Domest Anim Endocrinol 2024; 88:106848. [PMID: 38574690 DOI: 10.1016/j.domaniend.2024.106848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/29/2024] [Accepted: 03/19/2024] [Indexed: 04/06/2024]
Abstract
Insulin is a potent adipogenic hormone that triggers a series of transcription factors that regulate the differentiation of preadipocytes into mature adipocytes. Ciglitazone specifically binds to peroxisome proliferator-activated receptor-γ (PPARγ), thereby promoting adipocyte differentiation. As a natural ligand of PPARγ, oleic acid (OA) can promote the translocation of PPARγ into the nucleus, regulate the expression of downstream genes, and promote adipocyte differentiation. We hypothesized that ciglitazone and oleic acid interact with insulin to enhance bovine preadipocyte differentiation. Preadipocytes were cultured 96 h in differentiation medium containing 10 mg/L insulin (I), 10 mg/L insulin + 10 µM cycloglitazone (IC), 10 mg/L insulin + 100 µM oleic acid (IO), or 10 mg/L insulin + 10 µM cycloglitazone+100 µM oleic acid (ICO). Control preadipocytes (CON) were cultured in differentiation medium (containing 5% fetal calf serum). The effects on the differentiation of Yanbian cattle preadipocytes were examined using molecular and transcriptomic techniques, including differentially expressed genes (DEGs) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) pathway analysis. I, IC, IO, and ICO treatments produced higher concentrations of triglycerides (TAG) and lipid droplet accumulation in preadipocytes compared with CON treatment (P < 0.05). Co-treatment of insulin and PPARγ agonists significantly increased the expression of genes involved in regulating adipogenesis and fatty acid synthesis. (P < 0.05). Differential expression analysis identified 1488, 1764, 1974 and 1368 DEGs in the I, IC, IO and ICO groups, respectively. KEGG pathway analysis revealed DEGs mainly enriched in PPAR signalling, FOXO signaling pathway and fatty acid metabolism. These results indicate that OA, as PPARγ agonist, can more effectively promote the expression of bovine lipogenesis genes and the content of TAG and adiponectin when working together with insulin, and stimulate the differentiation of bovine preadipocytes. These findings provide a basis for further screening of relevant genes and transcription factors in intramuscular fat deposition and meat quality to enhance breeding programs.
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Affiliation(s)
- Pan Pan Guo
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, PR China; Healthcare International Innovation Institute, Jiangmen 529020, PR China; Guangdong University of Technology, Guangzhou 510000, PR China; Engineering Research Centre of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Department of Animal Science, College of Agriculture, Yanbian University, Yanji 133002, PR China
| | - Xue Rui Yao
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, PR China; Healthcare International Innovation Institute, Jiangmen 529020, PR China; Guangdong University of Technology, Guangzhou 510000, PR China
| | - Yong Nan Xu
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, PR China
| | - Xin Jin
- Engineering Research Centre of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Department of Animal Science, College of Agriculture, Yanbian University, Yanji 133002, PR China; Laboratory Animal Center, Yanbian University, Yanji 133002, PR China
| | - Qiang Li
- Engineering Research Centre of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Department of Animal Science, College of Agriculture, Yanbian University, Yanji 133002, PR China
| | - Chang Guo Yan
- Engineering Research Centre of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Department of Animal Science, College of Agriculture, Yanbian University, Yanji 133002, PR China; Yanbian Hongchao Wisdom Animal Husbandry Co., LTD, Yanji 133002, PR China
| | - Nam Hyung Kim
- Guangdong Provincial Key Laboratory of Large Animal Models for Biomedicine, School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, PR China
| | - Xiang Zi Li
- Engineering Research Centre of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Department of Animal Science, College of Agriculture, Yanbian University, Yanji 133002, PR China.
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Yu IS, Choi J, Kim MK, Kim MJ. The Comparison of Commercial Serum-Free Media for Hanwoo Satellite Cell Proliferation and the Role of Fibroblast Growth Factor 2. Food Sci Anim Resour 2023; 43:1017-1030. [PMID: 37969322 PMCID: PMC10636218 DOI: 10.5851/kosfa.2023.e68] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 09/28/2023] [Accepted: 10/05/2023] [Indexed: 11/17/2023] Open
Abstract
Fetal bovine serum (FBS), which contains various nutrients, comprises 20% of the growth medium for cell-cultivated meat. However, ethical, cost, and scientific issues, necesitates identification of alternatives. In this study, we investigated commercially manufactured serum-free media capable of culturing Hanwoo satellite cells (HWSCs) to identify constituent proliferation enhancing factors. Six different serum-free media were selected, and the HWSC proliferation rates in these serum-free media were compared with that of control medium supplemented with 20% FBS. Among the six media, cell proliferation rates were higher only in StemFlexTM Medium (SF) and Mesenchymal Stem Cell Growth Medium DXF (MS) than in the control medium. SF and MS contain high fibroblast growth factor 2 (FGF2) concentrations, and we found upregulated FGF2 protein expression in cells cultured in SF or MS. Activation of the fibroblast growth factor receptor 1 (FGFR1)-mediated signaling pathway and stimulation of muscle satellite cell proliferation-related factors were confirmed by the presence of related biomarkers (FGFR1, FRS2, Raf1, ERK, p38, Pax7, and MyoD) as indicated by quantitative polymerase chain reaction, western blotting, and immunocytochemistry. Moreover, PD173074, an FGFR1 inhibitor suppressed cell proliferation in SF and MS and downregulated related biomarkers (FGFR1, FRS2, Raf1, and ERK). The promotion of cell proliferation in SF and MS was therefore attributed to FGF2, which indicates that FGFR1 activation in muscle satellite cells may be a target for improving the efficiency of cell-cultivated meat production.
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Affiliation(s)
- In-sun Yu
- Division of Food Functionality Research,
Korea Food Research Institute, Wanju 55365, Korea
- Department of Food Science and Human
Nutrition and K-Food Research Center, Jeonbuk National
University, Jeonju 54896, Korea
| | - Jungseok Choi
- Department of Animal Science, Chungbuk
National University, Cheongju 28644, Korea
| | - Mina K. Kim
- Department of Food Science and Human
Nutrition and K-Food Research Center, Jeonbuk National
University, Jeonju 54896, Korea
| | - Min Jung Kim
- Division of Food Functionality Research,
Korea Food Research Institute, Wanju 55365, Korea
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Zhang J, Li Q, Yan Y, Sun B, Wang Y, Tang L, Wang E, Yu J, Nogoy KMC, Li X, Choi SH. Effect of ciglitazone on adipogenic transdifferentiation of bovine skeletal muscle satellite cells. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2021; 63:934-953. [PMID: 34447968 PMCID: PMC8367394 DOI: 10.5187/jast.2021.e87] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/22/2021] [Accepted: 06/30/2021] [Indexed: 12/15/2022]
Abstract
Ciglitazone is a member of the thiazolidinedione family, and specifically binds
to peroxisome proliferator-activated receptor-γ
(PPARγ), thereby promoting adipocyte
differentiation. We hypothesized that ciglitazone as a
PPARγ ligand in the absence of an adipocyte
differentiation cocktail would increase adiponectin and adipogenic gene
expression in bovine satellite cells (BSC). Muscle-derived BSCs were isolated
from six, 18-month-old Yanbian Yellow Cattle. The BSC were cultured for 96 h in
differentiation medium containing 5 µM ciglitazone (CL), 10 µM
ciglitazone (CM), or 20 µM ciglitazone (CH). Control (CON) BSC were
cultured only in a differentiation medium (containing 2% horse serum). The
presence of myogenin, desmin, and paired box7 (Pax7) proteins was confirmed in the BSC by
immunofluorescence staining. The CL, CM, and CH treatments produced higher
concentrations of triacylglycerol and lipid droplet accumulation in myotubes
than those of the CON treatment. Ciglitazone treatments significantly increased
the relative expression of PPARγ,
CCAAT/enhancer-binding protein alpha
(C/EBPα), C/EBPβ,
fatty acid synthase, stearoyl-CoA
desaturase, and perilipin 2. Ciglitazone
treatments increased gene expression of Pax3 and
Pax7 and decreased expression of myogenic
differentiation-1, myogenin, myogenic regulatory factor-5, and
myogenin-4 (p < 0.01). Adiponectin
concentration caused by ciglitazone treatments was significantly greater than
CON (p < 0.01). RNA sequencing showed that 281
differentially expressed genes (DEGs) were found in the treatments of
ciglitazone. DEGs gene ontology (GO) analysis showed that the top 10 GO
enrichment significantly changed the biological processes such as protein
trimerization, negative regulation of cell proliferation, adipocytes
differentiation, and cellular response to external stimulus. Kyoto Encyclopedia
of Genes and Genomes pathway analysis showed that DEGs were involved in the p53
signaling pathway, PPAR signaling pathway, biosynthesis of
amino acids, tumor necrosis factor signaling pathway, non-alcoholic fatty liver
disease, PI3K-Akt signaling pathway, and Wnt signaling pathway. These results
indicate that ciglitazone acts as PPARγ agonist,
effectively increases the adiponectin concentration and adipogenic gene
expression, and stimulates the conversion of BSC to adipocyte-like cells in the
absence of adipocyte differentiation cocktail.
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Affiliation(s)
- Junfang Zhang
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Qiang Li
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Yan Yan
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Bin Sun
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Ying Wang
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Lin Tang
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Enze Wang
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Jia Yu
- Department of Animal Science, Chungbuk National University, Cheongju 28644, Korea
| | | | - Xiangzi Li
- Engineering Research Center of North-East Cold Region Beef Cattle Science & Technology Innovation, Ministry of Education, Yanbian University, Yanji 133002, China.,Department of Animal Science, Yanbian University, Yanji 133002, China
| | - Seong-Ho Choi
- Department of Animal Science, Chungbuk National University, Cheongju 28644, Korea
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Wang L, Shan T. Factors inducing transdifferentiation of myoblasts into adipocytes. J Cell Physiol 2020; 236:2276-2289. [PMID: 32989814 DOI: 10.1002/jcp.30074] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/08/2020] [Accepted: 09/14/2020] [Indexed: 12/15/2022]
Abstract
Fat infiltration in skeletal muscle is observed in several myopathies, is associated with muscular dysfunction, and is strongly correlated with insulin resistance, diabetes, obesity, and aging. In animal production, skeletal muscle fat (also known as intermuscular and intramuscular fat) is positively related to meat quality including tenderness, flavor, and juiciness. Thus, understanding the cell origin and regulation mechanism of skeletal muscle fat infiltration is important for developing therapies against human myopathies as well as for improving meat quality. Notably, age, sarcopenia, oxidative stress, injury, and regeneration can activate adipogenic differentiation potential in myoblasts and affect fat accumulation in skeletal muscle. In addition, several transcriptional and nutritional factors can directly induce transdifferentiation of myoblasts into adipocytes. In this review, we focused on the recent progress in understanding the muscle-to-adipocyte differentiation and summarized and discussed the genetic, nutritional, and physiological factors that can induce transdifferentiation of myoblasts into adipocytes. Moreover, the regulatory roles and mechanisms of these factors during the transdifferentiation process were also discussed.
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Affiliation(s)
- Liyi Wang
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, Hangzhou, Zhejiang, China
- Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Laboratory of Feed and Animal Nutrition, Hangzhou, China
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5
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Avian Satellite Cell Plasticity. Animals (Basel) 2020; 10:ani10081322. [PMID: 32751789 PMCID: PMC7459542 DOI: 10.3390/ani10081322] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 12/29/2022] Open
Abstract
Simple Summary Adult muscle regeneration and reconstruction is dependent on a population of adult stem cells, known as satellite cells. These cells were suggested to exhibit a certain degree of plasticity, being able to differentiate into lineages unassociated with muscle cells. In this study, we have used a range of visualization methods, as well as PCR, to identify a population of satellite cells obtained from samples of chicken muscles. Then, the cells, expressing a previously introduced detectable transgene, were introduced into chicken embryos and detected after three and eighteen days of their development. The traces of cell populations derived from the introduced satellite cells were detected in a range of embryonic tissues in both of the studied timeframes. The results of this study give further proof of the plasticity of muscle satellite cells, showing the potential locations of their migration during embryonic development. Abstract Adult myogenesis is dependent on a population of precursor cells, located between the sarcolemma and the basal lamina of the muscle fiber. These satellite cells, usually present in a quiescent state, become activated in response to mechanical muscle strain, differentiating and fusing to add new nuclei to enlarging muscles. As their myogenic lineage commitment is induced on demand, muscle satellite cells exhibit a certain amount of plasticity, possibly being able to be directed to differentiate into non-myogenic fates. In this study, myosatellite cells were isolated from chicken muscle samples, characterized in vitro and introduced into developing blastoderms. They were further investigated using fluorescence microscopy, immunohistochemistry and PCR, to determine their location in embryos after three and eighteen days. The results of the in vitro analysis confirmed that the cells obtained from the Pectoralis thoracicus are highly myogenic, based on the expression of Pax7, Myogenin, MyoD, Desmin and the myotube assay. Furthermore, the investigation of satellite cells within the embryo showed their migration to the regions of Pectoralis thoracicus, heart, liver, gizzard, proventriculus, intestine and brain. Overall, the results of the study proved the high myogenicity of chicken Pectoralis thoracicus cell isolates, as well as provided new information about their migration pathways following introduction into the blastocyst. The presence of the introduced LacZ or eGFP transgenes across the embryo, even 20 days after myosatellite cell injection, further supports the notion that satellite cells exhibit significant plasticity, potentially transdifferentiating into non-muscle lineages.
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Li XZ, Yan Y, Zhang JF, Sun JF, Sun B, Yan CG, Choi SH, Johnson BJ, Kim JK, Smith SB. Oleic acid in the absence of a PPARγ agonist increases adipogenic gene expression in bovine muscle satellite cells1. J Anim Sci 2019; 97:4114-4123. [PMID: 31424542 DOI: 10.1093/jas/skz269] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 08/12/2019] [Indexed: 12/31/2022] Open
Abstract
We hypothesized that oleic acid (OA) in the absence of a thiazolidinedione (i.e., a synthetic peroxisome proliferator-activated receptorγ [PPARγ] agonist) would increase adipogenic gene expression in bovine muscle satellite cells (BSC). The BSC were cultured in differentiation medium containing 10 µM ciglitazone (CI), 100 µM OA, or 100 µM OA plus 10 µM CI (CI-OA). Control (CON) BSC were cultured only in differentiation media (containing 2% horse serum). The presence of myogenin, desmin, and paired box 7 proteins was confirmed in the BSC by immunofluorescence staining, demonstrating that we had isolated myogenic cells. The OA BSC had lesser paired box 3 (Pax3) and myogenic differentiation 1 expression but greater Pax7 and mygogenin (MYOG) expression (P < 0.05), than the CON BSC. The CI BSC had greater Pax3, Pax7, and MYOG expression than CON BSC (P < 0.05), suggesting that CI would promote BSC myogenesis under pro-myogenic conditions (i.e., when cultured with horse serum). However, both the OA and CI treatments upregulated the expression of PPARγ, CCAAT/enhancer-binding protein alpha (C/EBPα) and C/EBPß, sterol regulatory element-binding protein 1, lipoprotein lipase, and glycerol-3-phosphate acyltransferase 3 gene expression, as well as media adiponectin concentration (P < 0.05). The CI, OA, and CI-OA treatments also increased triacylglycerol and lipid droplet accumulation, in spite of upregulation (relative to CON BSC) of adenosine monophosphate-activated protein kinase alpha-1, perilipin 2 (PLIN2), and PLIN3 in BSC and downregulation of G protein-coupled protein receptor 43, acyl-CoA synthetase long chain family member 3, and stearoyl-CoA desaturase (P < 0.05). These results indicate that OA in the absence of a synthetic PPARγ agonist can effectively increase adipogenic gene expression in BSC.
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Affiliation(s)
- Xiang Z Li
- Co-Innovation Center of Beef Cattle Science and Industry Technology, Yanbian University, Yanji, Jilin, P. R. China
| | - Yan Yan
- Co-Innovation Center of Beef Cattle Science and Industry Technology, Yanbian University, Yanji, Jilin, P. R. China
| | - Jun F Zhang
- Co-Innovation Center of Beef Cattle Science and Industry Technology, Yanbian University, Yanji, Jilin, P. R. China
| | - Jian F Sun
- Co-Innovation Center of Beef Cattle Science and Industry Technology, Yanbian University, Yanji, Jilin, P. R. China
| | - Bin Sun
- Co-Innovation Center of Beef Cattle Science and Industry Technology, Yanbian University, Yanji, Jilin, P. R. China
| | - Chang G Yan
- Co-Innovation Center of Beef Cattle Science and Industry Technology, Yanbian University, Yanji, Jilin, P. R. China
| | - Seong H Choi
- Department of Animal Science, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Bradley J Johnson
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX
| | - Jong K Kim
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX
| | - Stephen B Smith
- Department of Animal Science, Texas A&M University, College Station, TX
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7
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Subi S, Lee SJ, Shiwani S, Singh NK. Differential characterization of myogenic satellite cells with linolenic and retinoic acid in the presence of thiazolidinediones from prepubertal Korean black goats. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2017; 31:439-448. [PMID: 28920418 PMCID: PMC5838350 DOI: 10.5713/ajas.17.0257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Revised: 06/15/2017] [Accepted: 08/31/2017] [Indexed: 12/27/2022]
Abstract
Objective Myogenic satellite cells were isolated from semitendinosus muscle of prepubertal Korean black goat to observe the differential effect of linolenic and retinoic acid in thepresence of thiazolidinediones (TZD) and also to observe the production insulin sensitive preadipocyte. Methods Cells were characterized for their stemness with cluster of differentiation 34 (CD34), CD13, CD106, CD44, Vimentin surface markers using flow cytometry. Cells characterized themselves as possessing significant (p<0.05) levels of CD13, CD34, CD106, Vimentin revealing their stemness potential. Goat myogenic satellite cells also exhibited CD44, indicating that they possessed a % of stemness factors of adipose lineage apart from their inherent stemness of paxillin factors 3/7. Results Cells during proliferation stayed absolutely and firmly within the myogenic fate without any external cues and continued to show a significant (p<0.05) fusion index % to express myogenic differentiation, myosin heavy chain, and smooth muscle actin in 2% horse serum. However, confluent myogenic satellite cells were the ones easily turning into adipogenic lineage. Intriguingly, upregulation in adipose specific genetic markers such as peroxisome proliferation-activated receptor γ, adiponectin, lipoprotein lipase, and CCAAT/enhancer binding protein α were observed and confirmed in all given treatments. However, the amount of adipogenesis was found to be statistically significant (p<0.01) with linolenic acid as compared to retinoic acid in combination with TZD’s. Conclusion Retinoic acid was found to produce smaller preadipocytes which have been assumed to have insulin sensitization and hence retinoic acid could be used as a potential agent to sensitize tissues to insulin in combination with TZD’s to treat diabetic conditions in humans and animals in future.
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Affiliation(s)
- S Subi
- College of Animal life sciences, Kangwon National University, Chuncheon 24341, Korea
| | - S J Lee
- College of Animal life sciences, Kangwon National University, Chuncheon 24341, Korea
| | - S Shiwani
- College of Animal life sciences, Kangwon National University, Chuncheon 24341, Korea
| | - N K Singh
- Department of Veterinary Surgery and Radiology, Faculty of Veterinary and Animal Sciences, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221005, Uttar Pradesh, India
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8
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Clark DL, Strasburg GM, Reed KM, Velleman SG. Influence of temperature and growth selection on turkey pectoralis major muscle satellite cell adipogenic gene expression and lipid accumulation. Poult Sci 2017; 96:1015-1027. [PMID: 28339556 DOI: 10.3382/ps/pew374] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 08/31/2016] [Indexed: 12/11/2022] Open
Abstract
p. major Immature poults have an inefficient thermoregulatory system, and therefore extreme ambient temperatures can impact their internal body temperature. Satellite cells, the only posthatch myonuclei source, are multipotential stem cells and sensitive to temperature. Selection for faster-growing, high-yielding birds has altered satellite-cell properties. The objective of the current study was to determine how temperature affects adipogenic properties of satellite cells isolated from the pectoralis major ( ) muscle of Randombred Control line ( ) and F line turkeys selected only for increased 16-wk body weight from the RBC2 line. Satellite cells were cultured at 2°C incremental temperatures between 33 and 43°C and compared to cells cultured at the control temperature of 38°C to ascertain temperature effects on lipid accumulation and expression of adipogenic genes: CCAAT/enhancer-binding protein-β ( ), peroxisome proliferator-activated receptor-γ ( ), and stearoyl-CoA desaturase ( ). During proliferation, the amount of quantifiable lipid in both F and RBC2 satellite cells increased at temperatures above 38°C ( P < 0.01) and decreased at temperatures below 38°C ( P < 0.01). Above 38°C, RBC2 satellite cells had more lipid ( P = 0.02) compared to the F line, whereas there were few differences between lines below 38°C. At 72 h of proliferation, expression of C/EBPβ , PPARγ , and SCD decreased ( P ≤ 0.02) as temperatures increased from 33 to 43°C in both cell lines. During differentiation expression of C/EBPβ increased ( P < 0.01) as temperatures increased from 33 to 43°C in both cell lines. In F line satellite cells, PPARγ expression decreased ( P < 0.01) with increasing temperatures during differentiation, whereas there was no linear trend in RBC2 cells. During differentiation expression of SCD increased as temperatures increased ( P < 0.01) in RBC2 cells, and there was no linear trend within the F line. Results from the current study suggest that environmental temperature can affect p. major satellite cellular fate; however, selection for increased body weight had little impact on these cellular responses.
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Affiliation(s)
- D L Clark
- Department of Animal Sciences, The Ohio State University/Ohio Agricultural Research and Development Center, Wooster OH; 44691
| | - G M Strasburg
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI 48824
| | - K M Reed
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN 55108
| | - S G Velleman
- Department of Animal Sciences, The Ohio State University/Ohio Agricultural Research and Development Center, Wooster OH; 44691
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9
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Grassot V, Bouchatal A, Da Silva A, Chantepie S, Papy-Garcia D, Maftah A, Gallet PF, Petit JM. Heparan sulfates and the decrease of N-glycans promote early adipogenic differentiation rather than myogenesis of murine myogenic progenitor cells. Differentiation 2016; 93:15-26. [PMID: 27689814 DOI: 10.1016/j.diff.2016.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 08/05/2016] [Accepted: 08/29/2016] [Indexed: 12/25/2022]
Abstract
In vitro, extracted muscle satellite cells, called myogenic progenitor cells, can differentiate either in myotubes or preadipocytes, depending on environmental factors and the medium. Transcriptomic analyses on glycosylation genes during satellite cells differentiation into myotubes showed that 31 genes present a significant variation of expression at the early stages of murine myogenic progenitor cells (MPC) differentiation. In the present study, we analyzed the expression of 383 glycosylation related genes during murine MPC differentiation into preadipocytes and compared the data to those previously obtained during their differentiation into myotubes. Fifty-six glycosylation related genes are specifically modified in their expression during early adipogenesis. The variations correspond mainly to: a decrease of N-glycans, and of alpha (2,3) and (2,6) linked sialic acids, and to a high level of heparan sulfates. A high amount of TGF-β1 in extracellular media during early adipogenesis was also observed. It seems that the increases of heparan sulfates and TGF-β1 favor pre-adipogenic differentition of MPC and possibly prevent their myogenic differentiation.
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Affiliation(s)
- Vincent Grassot
- INRA, UMR 1061, F-87060 Limoges, France; Université de Limoges, Faculté des Sciences et Techniques, Unité de Génétique Moléculaire Animale, UGMA, F-87060 Limoges, France.
| | - Amel Bouchatal
- INRA, UMR 1061, F-87060 Limoges, France; Université de Limoges, Faculté des Sciences et Techniques, Unité de Génétique Moléculaire Animale, UGMA, F-87060 Limoges, France.
| | - Anne Da Silva
- INRA, UMR 1061, F-87060 Limoges, France; Université de Limoges, Faculté des Sciences et Techniques, Unité de Génétique Moléculaire Animale, UGMA, F-87060 Limoges, France.
| | - Sandrine Chantepie
- CNRS, EAC 7149, F-94000 Créteil, France; Université Paris Est Créteil, Laboratoire Croissance, Régénération, Réparation et Régénération Tissulaires, CRRET, F-94000 Créteil, France.
| | - Dulce Papy-Garcia
- CNRS, EAC 7149, F-94000 Créteil, France; Université Paris Est Créteil, Laboratoire Croissance, Régénération, Réparation et Régénération Tissulaires, CRRET, F-94000 Créteil, France.
| | - Abderrahman Maftah
- INRA, UMR 1061, F-87060 Limoges, France; Université de Limoges, Faculté des Sciences et Techniques, Unité de Génétique Moléculaire Animale, UGMA, F-87060 Limoges, France.
| | - Paul-François Gallet
- INRA, UMR 1061, F-87060 Limoges, France; Université de Limoges, Faculté des Sciences et Techniques, Unité de Génétique Moléculaire Animale, UGMA, F-87060 Limoges, France.
| | - Jean-Michel Petit
- INRA, UMR 1061, F-87060 Limoges, France; Université de Limoges, Faculté des Sciences et Techniques, Unité de Génétique Moléculaire Animale, UGMA, F-87060 Limoges, France.
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Jan AT, Lee EJ, Ahmad S, Choi I. Meeting the meat: delineating the molecular machinery of muscle development. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2016; 58:18. [PMID: 27168943 PMCID: PMC4862161 DOI: 10.1186/s40781-016-0100-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/07/2016] [Indexed: 02/07/2023]
Abstract
Muscle, studied mostly with respect to meat production, represents one of the largest protein reservoirs of the body. As gene expression profiling holds credibility to deal with the increasing demand of food from animal sources, excessive loss due to myopathies and other muscular dystrophies was found detrimental as it aggravates diseases that result in increased morbidity and mortality. Holding key point towards improving the developmental program of muscle in meat producing animals, elucidating the underlying mechanisms of the associated pathways in livestock animals is believed to open up new avenues towards enhancing the lean tissue deposition. To this end, identification of vital candidate genes having no known function in myogenesis, is believed to increase the current understanding of the physiological processes going on in the skeletal muscle tissue. Taking consequences of gene expression changes into account, knowledge of the pathways associated with their activation and as such up-regulation seems critical for the overall muscle homeostasis. Having important implications on livestock production, a thorough understanding of postnatal muscle development seems a timely step to fulfil the growing need of ever increasing populations of the world.
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Affiliation(s)
- Arif Tasleem Jan
- School of Biotechnology, Yeungnam University, Gyeongsan, 712-749 Republic of Korea
| | - Eun Ju Lee
- School of Biotechnology, Yeungnam University, Gyeongsan, 712-749 Republic of Korea
| | - Sarafraz Ahmad
- School of Biotechnology, Yeungnam University, Gyeongsan, 712-749 Republic of Korea
| | - Inho Choi
- School of Biotechnology, Yeungnam University, Gyeongsan, 712-749 Republic of Korea
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11
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Pires VMR, Madeira MS, Dowle AA, Thomas J, Almeida AM, Prates JAM. Increased intramuscular fat induced by reduced dietary protein in finishing pigs: effects on the longissimus lumborum muscle proteome. MOLECULAR BIOSYSTEMS 2016; 12:2447-57. [DOI: 10.1039/c6mb00213g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Reduced protein diets affects the amounts of proteins related to fibre type and structure and energy.
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Affiliation(s)
- V. M. R. Pires
- CIISA
- Faculdade de Medicina Veterinária
- Universidade de Lisboa
- Avenida da Universidade Técnica
- 1300-477 Lisbon
| | - M. S. Madeira
- CIISA
- Faculdade de Medicina Veterinária
- Universidade de Lisboa
- Avenida da Universidade Técnica
- 1300-477 Lisbon
| | - A. A. Dowle
- Centre of Excellence in Mass Spectrometry
- University of York
- York
- UK
| | - J. Thomas
- Centre of Excellence in Mass Spectrometry
- University of York
- York
- UK
| | - A. M. Almeida
- CIISA
- Faculdade de Medicina Veterinária
- Universidade de Lisboa
- Avenida da Universidade Técnica
- 1300-477 Lisbon
| | - J. A. M. Prates
- CIISA
- Faculdade de Medicina Veterinária
- Universidade de Lisboa
- Avenida da Universidade Técnica
- 1300-477 Lisbon
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12
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Review: Animal model and the current understanding of molecule dynamics of adipogenesis. Animal 2016; 10:927-32. [DOI: 10.1017/s1751731115002992] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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13
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Zearalenone mycotoxin affects immune mediators, MAPK signalling molecules, nuclear receptors and genome-wide gene expression in pig spleen. PLoS One 2015; 10:e0127503. [PMID: 26011631 PMCID: PMC4444191 DOI: 10.1371/journal.pone.0127503] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 04/16/2015] [Indexed: 11/19/2022] Open
Abstract
The toxicity of zearalenone (ZEA) was evaluated in swine spleen, a key organ for the innate and adaptative immune response. Weaned pigs were fed for 18 days with a control or a ZEA contaminated diet. The effect of ZEA was assessed on wide genome expression, pro- (TNF-α, IL-8, IL-6, IL-1β, IFN-γ) and anti-inflammatory (IL-10, IL-4) cytokines, other molecules involved in inflammatory processes (MMPs/TIMPs), as well as signaling molecules, (p38/JNK1/JNK2-MAPKs) and nuclear receptors (PPARγ/NFkB/AP-1/STAT3/c-JUN). Microarray analysis showed that 46% of total number of differentially expressed genes was involved in cellular signaling pathway, 13% in cytokine network and 10% in the inflammatory response. ZEA increased expression and synthesis of pro- inflammatory (TNF-α, IL-8, IL-6, IL-1β) and had no effect on IFN-γ, IL-4 and IL-10 cytokines in spleen. The inflammatory stimulation might be a consequence of JNK pathway activation rather than of p-38MAPK and NF-kB involvement whose gene and protein expression were suppressed by ZEA action. In summary, our findings indicated the role of ZEA as an immune disruptor at spleen level.
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Schering L, Hoene M, Kanzleiter T, Jähnert M, Wimmers K, Klaus S, Eckel J, Weigert C, Schürmann A, Maak S, Jonas W, Sell H. Identification of novel putative adipomyokines by a cross-species annotation of secretomes and expression profiles. Arch Physiol Biochem 2015; 121:194-205. [PMID: 26599229 DOI: 10.3109/13813455.2015.1092044] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Adipose tissue and skeletal muscle are organs that respond strongly to obesity and physical activity exhibiting high secretory activity. To identify novel putative adipomyokines, comparative expression studies of skeletal muscle and adipose tissue of lean (C57BL/6J) and obese (C57BL/6J on a high-fat diet and NZO) mice, of sedentary and endurance trained C57BL/6J mice and of cattle characterized by different amounts of intramuscular fat were combined with human secretome data and scored. In highly regulated transcripts, we identified 119 myokines, 79 adipokines and 22 adipomyokines. Network analysis of these candidates revealed remodelling of extracellular matrix and tissue fibrosis as relevant functions of several of these candidates. Given the pathophysiogical relevance of fibrosis for adipose-muscle-cross-talk in obesity and type 2 diabetes and its physiological role in exercise adaptation and meat quality of farm animals, they represent interesting candidates for further investigations in different research areas and species.
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Affiliation(s)
- Lisa Schering
- a Institute for Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology , Dummerstorf , Germany
| | - Miriam Hoene
- b Division of Clinical Chemistry and Pathobiochemistry , Department of Internal Medicine IV, University Hospital Tübingen , Tübingen , Germany
| | - Timo Kanzleiter
- c Department of Experimental Diabetology , German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany and German Center for Diabetes Research (DZD) , Neuherberg , Germany
- d German Center for Diabetes Research (DZD) , Neuherberg , Germany
| | - Markus Jähnert
- c Department of Experimental Diabetology , German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany and German Center for Diabetes Research (DZD) , Neuherberg , Germany
- d German Center for Diabetes Research (DZD) , Neuherberg , Germany
| | - Klaus Wimmers
- e Institute for Genome Biology, Leibniz Institute for Farm Animal Biology , Dummerstorf , Germany
| | - Susanne Klaus
- f Group of Energy Metabolism, German Institute of Human Nutrition Potsdam-Rehbruecke , Nuthetal , Germany , and
| | - Jürgen Eckel
- d German Center for Diabetes Research (DZD) , Neuherberg , Germany
- g Paul-Langerhans-Group for Integrative Physiology, German Diabetes Center , Düsseldorf , Germany
| | - Cora Weigert
- b Division of Clinical Chemistry and Pathobiochemistry , Department of Internal Medicine IV, University Hospital Tübingen , Tübingen , Germany
- d German Center for Diabetes Research (DZD) , Neuherberg , Germany
| | - Annette Schürmann
- c Department of Experimental Diabetology , German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany and German Center for Diabetes Research (DZD) , Neuherberg , Germany
- d German Center for Diabetes Research (DZD) , Neuherberg , Germany
| | - Steffen Maak
- a Institute for Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology , Dummerstorf , Germany
| | - Wenke Jonas
- c Department of Experimental Diabetology , German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany and German Center for Diabetes Research (DZD) , Neuherberg , Germany
- d German Center for Diabetes Research (DZD) , Neuherberg , Germany
| | - Henrike Sell
- d German Center for Diabetes Research (DZD) , Neuherberg , Germany
- g Paul-Langerhans-Group for Integrative Physiology, German Diabetes Center , Düsseldorf , Germany
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Chen X, Feng Y, Yang WJ, Shu G, Jiang QY, Wang XQ. Effects of dietary thiazolidinedione supplementation on growth performance, intramuscular fat and related genes mRNA abundance in the longissimus dorsi muscle of finishing pigs. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2014; 26:1012-20. [PMID: 25049880 PMCID: PMC4093500 DOI: 10.5713/ajas.2012.12722] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Revised: 03/26/2013] [Accepted: 02/01/2013] [Indexed: 02/08/2023]
Abstract
The objective of this study was to investigate the effect of dietary supplementation with thiazolidinedione (TZD) on growth performance and meat quality of finishing pigs. In Experiment 1, 80 castrated finishing pigs (Large White×Landrace, BW = 54.34 kg) were randomly assigned to 2 treatments with 5 replicates of 8 pigs each. The experimental pigs in the 2 groups were respectively fed with a diet with or without a TZD supplementation (15 mg/kg). In Experiment 2, 80 castrated finishing pigs (Large White×Landrace, BW = 71.46 kg) were divided into 2 treatments as designed in Experiment 1, moreover, carcass evaluations were performed. The results from Experiment 1 showed that TZD supplementation could significantly decreased the average daily feed intake (ADFI) (p<0.05) during 0 to 28 d, without impairing the average daily gain (ADG) (p>0.05). In Experiment 2, the ADG was significantly increased by TZD supplementation during 14 to 28 d and 0 to 28 d (p<0.05) and the feed:gain ratio (F:G) was significantly decreased by TZD supplementation during 0 to 28 d (p<0.05). Compared with the control group, TZD group had significantly higher serum triglyceride (TG) concentration at 28h and serum high-density lipoprotein (HDL) levels at 14 d (p<0.05). Moreover, there was an apparent improvement in the marbling score (p<0.10) and intramuscular fat (IMF) content (p<0.10) of the longissimus dorsi muscle in pigs treated by TZD supplementation. Real-time RT-PCR analyses demonstrated that pigs of TZD group had higher mRNA abundance of PPARγ coactivator 1 (PGC-1) (p<0.05) and fatty acid-binding protein 3 (FABP3) (p<0.05) than pigs of control group. Taken together, these results suggested that dietary TZD supplementation could improve growth performance and increase the IMF content of finishing pigs through regulating the serum parameters and genes mRNA abundance involved in fat metabolism.
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Affiliation(s)
- X Chen
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, Department of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Y Feng
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, Department of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - W J Yang
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, Department of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - G Shu
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, Department of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Q Y Jiang
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, Department of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - X Q Wang
- Guangdong Provincial Key Laboratory of Agro-Animal Genomics and Molecular Breeding, Department of Animal Science, South China Agricultural University, Guangzhou, 510642, China
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Sadkowski T, Ciecierska A, Majewska A, Oprządek J, Dasiewicz K, Ollik M, Wicik Z, Motyl T. Transcriptional background of beef marbling - novel genes implicated in intramuscular fat deposition. Meat Sci 2014; 97:32-41. [PMID: 24491505 DOI: 10.1016/j.meatsci.2013.12.017] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 12/02/2013] [Accepted: 12/24/2013] [Indexed: 01/04/2023]
Abstract
The purpose of this study was to identify novel marbling-related genes by comparison of the global gene expression in semitendinosus muscle of 15-month-old Limousin (LIM), Holstein-Friesian (HF) and Hereford (HER) bulls. Muscle of LIM was lean with low intramuscular fat (IMF) content (0.53%) unlike the marbled muscles of HER and HF characterized by higher amounts of IMF (1.10 and 0.81%, respectively). The comparison of muscle transcriptional profile between marbled and lean beef revealed significant differences in expression of 144 genes, presumably involved in consecutive stages of adipose tissue development, such as preadipocyte proliferation and differentiation, adipocyte maturation, lipid filling and lipid metabolism leading to increased IMF deposition and marbling development. Correlation coefficients and regression analysis for nine of them (gadd45a, pias3, ccrn4l, diras3, pou5f1, hoxa9, atp2a2 and pim1) validated by real-time qPCR confirmed their moderate-high correlation with IMF% and explained up to 70.5% of the total variability in IMF deposition in the bulls.
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Affiliation(s)
- T Sadkowski
- Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Warsaw, Poland.
| | - A Ciecierska
- Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - A Majewska
- Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - J Oprządek
- Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Jastrzębiec, Poland
| | - K Dasiewicz
- Department of Food Technology, Faculty of Food Sciences, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - M Ollik
- Department of Experimental Design and Bioinformatics, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - Z Wicik
- Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
| | - T Motyl
- Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw University of Life Sciences - SGGW, Warsaw, Poland
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17
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Lee EJ, Kamli MR, Pokharel S, Malik A, Tareq KMA, Roouf Bhat A, Park HB, Lee YS, Kim S, Yang B, Young Chung K, Choi I. Expressed sequence tags for bovine muscle satellite cells, myotube formed-cells and adipocyte-like cells. PLoS One 2013; 8:e79780. [PMID: 24224006 PMCID: PMC3818215 DOI: 10.1371/journal.pone.0079780] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Accepted: 09/25/2013] [Indexed: 12/25/2022] Open
Abstract
Background Muscle satellite cells (MSCs) represent a devoted stem cell population that is responsible for postnatal muscle growth and skeletal muscle regeneration. An important characteristic of MSCs is that they encompass multi potential mesenchymal stem cell activity and are able to differentiate into myocytes and adipocytes. To achieve a global view of the genes differentially expressed in MSCs, myotube formed-cells (MFCs) and adipocyte-like cells (ALCs), we performed large-scale EST sequencing of normalized cDNA libraries developed from bovine MSCs. Results A total of 24,192 clones were assembled into 3,333 clusters, 5,517 singletons and 3,842contigs. Functional annotation of these unigenes revealed that a large portion of the differentially expressed genes are involved in cellular and signaling processes. Database for Annotation, Visualization and Integrated Discovery (DAVID) functional analysis of three subsets of highly expressed gene lists (MSC233, MFC258, and ALC248) highlighted some common and unique biological processes among MSC, MFC and ALC. Additionally, genes that may be specific to MSC, MFC and ALC are reported here, and the role of dimethylargininedimethylaminohydrolase2 (DDAH2) during myogenesis and hemoglobinsubunitalpha2 (HBA2) during transdifferentiation in C2C12 were assayed as a case study. DDAH2 was up-regulated during myognesis and knockdown of DDAH2 by siRNA significantly decreased myogenin (MYOG) expression corresponding with the slight change in cell morphology. In contrast, HBA2 was up-regulated during ALC formation and resulted in decreased intracellular lipid accumulation and CD36 mRNA expression upon knockdown assay. Conclusion In this study, a large number of EST sequences were generated from the MSC, MFC and ALC. Overall, the collection of ESTs generated in this study provides a starting point for the identification of novel genes involved in MFC and ALC formation, which in turn offers a fundamental resource to enable better understanding of the mechanism of muscle differentiation and transdifferentiation.
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Affiliation(s)
- Eun Ju Lee
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
- Bovine Genome Resources Bank, Yeungnam University, Gyeongsan, Republic of Korea
| | - Majid Rasool Kamli
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
| | - Smritee Pokharel
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
| | - Adeel Malik
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
| | - K. M. A. Tareq
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
| | - Abdul Roouf Bhat
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
| | - Hee-Bok Park
- Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Yong Seok Lee
- Bovine Genome Resources Bank, Yeungnam University, Gyeongsan, Republic of Korea
- Department of Life Science and Biotechnology, College of Natural Sciences, Soonchunhyang University, Asan, Korea
| | - SangHoon Kim
- Department of Biology, Kyung Hee University, Seoul, Republic of Korea
| | - Bohsuk Yang
- Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Seoul, Republic of Korea
| | - Ki Young Chung
- Hanwoo Experiment Station, National Institute of Animal Science, RDA, Pyeongchang, Seoul, Republic of Korea
- * E-mail: (IC); (KYC)
| | - Inho Choi
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
- Bovine Genome Resources Bank, Yeungnam University, Gyeongsan, Republic of Korea
- * E-mail: (IC); (KYC)
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Natural feed contaminant zearalenone decreases the expressions of important pro- and anti-inflammatory mediators and mitogen-activated protein kinase/NF-κB signalling molecules in pigs. Br J Nutr 2013; 111:452-64. [DOI: 10.1017/s0007114513002675] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Zearalenone (ZEA) is an oestrogenic mycotoxin produced byFusariumspecies, considered to be a risk factor from both public health and agricultural perspectives. In the presentin vivostudy, a feeding trial was conducted to evaluate thein vivoeffect of a ZEA-contaminated diet on immune response in young pigs. The effect of ZEA on pro-inflammatory (TNF-α, IL-8, IL-6, IL-1β and interferon-γ) and anti-inflammatory (IL-10 and IL-4) cytokines and other molecules involved in inflammatory processes (matrix metalloproteinases (MMP)/tissue inhibitors of matrix metalloproteinases (TIMP), nuclear receptors: PPARγ and NF-κB1, mitogen-activated protein kinases (MAPK): mitogen-activated protein kinase kinase kinase 7 (TAK1)/mitogen-activated protein kinase 14 (p38α)/mitogen-activated protein kinase 8 (JNK1)/ mitogen-activated protein kinase 9 (JNK2)) in the liver of piglets was investigated. The present results showed that a concentration of 316 parts per billion ZEA leads to a significant decrease in the levels of pro- and anti-inflammatory cytokines at both gene expression and protein levels, correlated with a decrease in the levels of other inflammatory mediators, MMP and TIMP. The results also showed that dietary ZEA induces a dramatic reduction in the expressions ofNF-κB1andTAK1/p38αMAPK genes in the liver of the experimentally intoxicated piglets, and has no effect on the expression ofPPARγmRNA. The present results suggest that the toxic action of ZEA begins in the upstream of the MAPK signalling pathway by the inhibition of TAK1, a MAPK/NF-κB activator. In conclusion, the present study shows that ZEA alters several important parameters of the hepatic cellular immune response. From an economic point of view, these data suggest that, in pigs, ZEA is not only a powerful oestrogenic mycotoxin but also a potential hepatotoxin when administered through the oral route. Therefore, the present results represent additional data from cellular and molecular levels that could be taken into account in the determination of the regulation limit of the tolerance to ZEA.
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Dong Y, Lakhia R, Thomas SS, Dong Y, Wang XH, Silva KAS, Zhang L. Interactions between p-Akt and Smad3 in injured muscles initiate myogenesis or fibrogenesis. Am J Physiol Endocrinol Metab 2013; 305:E367-75. [PMID: 23736539 PMCID: PMC3742853 DOI: 10.1152/ajpendo.00644.2012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In catabolic conditions such as aging and diabetes, IGF signaling is impaired and fibrosis develops in skeletal muscles. To examine whether impaired IGF signaling initiates muscle fibrosis, we generated IGF-IR(+/-) heterozygous mice by crossing loxP-floxed IGF-IR (exon 3) mice with MyoD-cre mice. IGF-IR(+/-) mice were studied because we were unable to obtain homozygous IGF-IR-KO mice. In IGF-IR(+/-) mice, both growth and expression of myogenic genes (MyoD and myogenin; markers of satellite cell proliferation and differentiation, respectively) were depressed. Likewise, in injured muscles of IGF-IR(+/-) mice, there was impaired regeneration, depressed expression of MyoD and myogenin, and increased expression of TGF-β1, α-SMA, collagen I, and fibrosis. To uncover mechanisms stimulating fibrosis, we isolated satellite cells from muscles of IGF-IR(+/-) mice and found reduced proliferation and differentiation plus increased TGF-β1 production. In C2C12 myoblasts (a model of satellite cells), IGF-I treatment inhibited TGF-β1-stimulated Smad3 phosphorylation, its nuclear translocation, and expression of fibronectin. Using immunoprecipitation assay, we found an interaction between p-Akt or Akt with Smad3 in wild-type mouse muscles and in C2C12 myoblasts; importantly, IGF-I increased p-Akt and Smad3 interaction, whereas TGF-β1 decreased it. Therefore, in muscles of IGF-IR(+/-) mice, the reduction in IGF-IR reduces p-Akt, allowing for dissociation and nuclear translocation of Smad3 to enhance the TGF-β1 signaling pathway, leading to fibrosis. Thus, strategies to improve IGF signaling could prevent fibrosis in catabolic conditions with impaired IGF signaling.
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Affiliation(s)
- Yanjun Dong
- Nephrology Division, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
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Islam MS, Protic O, Giannubilo SR, Toti P, Tranquilli AL, Petraglia F, Castellucci M, Ciarmela P. Uterine leiomyoma: available medical treatments and new possible therapeutic options. J Clin Endocrinol Metab 2013; 98:921-34. [PMID: 23393173 DOI: 10.1210/jc.2012-3237] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
CONTEXT Uterine leiomyomas (fibroids or myomas) are benign tumors of the uterus and are clinically apparent in up to 25% of reproductive-age women. Heavy or abnormal uterine bleeding, pelvic pain or pressure, infertility, and recurrent pregnancy loss are generally associated with leiomyoma. Although surgical and radiological therapies are frequently used for the management of this tumor, medical therapies are considered the first-line treatment of leiomyoma. EVIDENCE ACQUISITION AND SYNTHESIS A review was conducted of electronic and print data comprising both original and review articles on pathophysiology and medical treatments of uterine leiomyoma retrieved from the PubMed or Google Scholar database up to June 2012. These resources were integrated with the authors' knowledge of the field. CONCLUSION To date, several pathogenetic factors such as genetic factors, epigenetic factors, estrogens, progesterone, growth factors, cytokines, chemokines, and extracellular matrix components have been implicated in leiomyoma development and growth. On the basis of current hypotheses, several medical therapies have been investigated. GnRH agonist has been approved by US Food and Drug Administration for reducing fibroid volume and related symptoms. In addition, the FDA also approved an intrauterine device, levonorgestrel-releasing intrauterine system (Mirena), for additional use to treat heavy menstrual bleeding in intrauterine device users only. Currently, mifepristone, asoprisnil, ulipristal acetate, and epigallocatechin gallate have been shown to be effective for fibroid regression and symptomatic improvement which are all in clinical trial. In addition, some synthetic and natural compounds as well as growth factor inhibitors are now under laboratory investigation, and they could serve as future therapeutic options.
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Affiliation(s)
- Md Soriful Islam
- Department of Experimental and Clinical Medicine, Faculty of Medicine, Polytechnic University of Marche, via Tronto 10/a, 60020 Ancona, Italy
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Hypoxia increases mouse satellite cell clone proliferation maintaining both in vitro and in vivo heterogeneity and myogenic potential. PLoS One 2012; 7:e49860. [PMID: 23166781 PMCID: PMC3500318 DOI: 10.1371/journal.pone.0049860] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2012] [Accepted: 10/18/2012] [Indexed: 12/25/2022] Open
Abstract
Satellite cells (SCs) are essential for postnatal muscle growth and regeneration, however, their expansion potential in vitro is limited. Recently, hypoxia has been used to enhance proliferative abilities in vitro of various primary cultures. Here, by isolating SCs from single mouse hindlimb skeletal myofibers, we were able to distinguish two subpopulations of clonally cultured SCs (Low Proliferative Clones - LPC - and High Proliferative Clones - HPC), which, as shown in rat skeletal muscle, were present at a fixed proportion. In addition, culturing LPC and HPC at a low level of oxygen we observed a two fold increased proliferation both for LPC and HPC. LPC showed higher myogenic regulatory factor (MRF) expression than HPC, particularly under the hypoxic condition. Notably, a different myogenic potential between LPC and HPC was retained in vivo: green fluorescent protein (GFP)+LPC transplantation in cardiotoxin-injured Tibialis Anterior led to a higher number of new GFP+muscle fibers per transplanted cell than GFP+HPC. Interestingly, the in vivo myogenic potential of a single cell from an LPC is similar if cultured both in normoxia and hypoxia. Therefore, starting from a single satellite cell, hypoxia allows a larger expansion of LPC than normal O2 conditions, obtaining a consistent amount of cells for transplantation, but maintaining their myogenic regeneration potential.
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Redshaw Z, Loughna PT. Oxygen concentration modulates the differentiation of muscle stem cells toward myogenic and adipogenic fates. Differentiation 2012; 84:193-202. [PMID: 22790207 DOI: 10.1016/j.diff.2012.06.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/23/2012] [Accepted: 06/05/2012] [Indexed: 01/08/2023]
Abstract
The physiological oxygen concentration of many tissues is far lower than that in which cells are typically cultured in vitro and this may inadvertently influence the proliferation and differentiation potential of many cell types. Muscle derived stem cells, known as satellite cells are responsible for the maintenance and repair of muscle tissue post-natally and in vivo would be exposed to oxygen concentrations of ∼2-5%. Relatively few studies describe the function of these cells in large animal models and here we investigate the influence oxygen concentration has on modulating porcine muscle derived stem cell fate. We compared cells derived from two metabolically distinct muscles, the diaphragm and the hind limb semi-membranosus (SM) muscle. The two sub-populations responded differently to culture at atmospheric (∼20%) and physiological (∼5%) oxygen concentration. While myogenesis was enhanced in both populations at low oxygen, noticeably diaphragm derived cells exhibited greater myotube formation, than those from SM. The trans-differentiation of cells derived from these two sources was similarly affected, with considerable differences seen in adipogenic and neuronal tendencies. In addition to the effect of oxygen on cell phenotype, the expression of key signalling proteins varied between the two sub-populations during early time-points of induced differentiation, suggesting altered regulation of muscle specific stem cells under these conditions. While differences in muscle stem cell potential requires further investigation, the culture of cells in physiological oxygen concentration appears as fundamental to recreating the micro-environmental niche as routinely used factors such as cytokines, substrata and matrices.
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Affiliation(s)
- Zoe Redshaw
- The University of Nottingham, School of Veterinary Medicine and Science, Sutton Bonington Campus, Sutton Bonington, Leics LE12 5RD, United Kingdom.
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23
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The effect of troglitazone on lipid accumulation and related gene expression in Hanwoo muscle satellite cell. J Physiol Biochem 2012; 69:97-109. [PMID: 22773295 DOI: 10.1007/s13105-012-0193-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Accepted: 06/22/2012] [Indexed: 12/25/2022]
Abstract
The current study was undertaken to determine the effect of the troglitazone (TGZ) on the expression of peroxisome proliferator-activating receptor (PPARγ), CCAAT/enhancer-binding protein, fatty acid binding protein 4, calpain 1 (CAPN1), and lipid accumulation in the myotube of Hanwoo muscle satellite cells. The satellite cells were treated with 5, 10, and 50 μM of TGZ for indicated time intervals. TGZ promoted the trans-differentiation with significant increase in glycerol accumulation. Polymerase chain reaction (PCR) and microarray results indicated that the TGZ treatment significantly increased the expression of adipogenic transcription factors. TGZ (10 and 50 μM) increased the CAPN1 gene expression 2.2- and 2.6-fold in real-time polymerase chain reaction analysis and 0.52- and 0.25-fold in microarray analysis, respectively, when compared with their respective controls. This result suggests that CAPN1 gene might be involved in the adipogenic differentiation programs. In addition, 13 genes were upregulated and 12 genes were downregulated in microarray analysis. Most of the up/downregulated genes were directly linked with adipogenesis.
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24
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Lee EJ, Lee HJ, Kamli MR, Pokharel S, Bhat AR, Lee YH, Choi BH, Chun T, Kang SW, Lee YS, Kim JW, Schnabel RD, Taylor JF, Choi I. Depot-specific gene expression profiles during differentiation and transdifferentiation of bovine muscle satellite cells, and differentiation of preadipocytes. Genomics 2012; 100:195-202. [PMID: 22728265 DOI: 10.1016/j.ygeno.2012.06.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 05/18/2012] [Accepted: 06/13/2012] [Indexed: 01/22/2023]
Abstract
We report a systematic study of gene expression during myogenesis and transdifferentiation in four bovine muscle tissues and of adipogenesis in three bovine fat tissues using DNA microarray analysis. One hundred hybridizations were performed and 7245 genes of known and unknown function were identified as being differentially expressed. Supervised hierarchical cluster analysis of gene expression patterns revealed the tissue specificity of genes. A close relationship in global gene expression observed for adipocyte-like cells derived from muscle and adipocytes derived from intramuscular fat suggests a common origin for these cells. The role of transthyretin in myogenesis is a novel finding. Different genes were highly induced during the transdifferentiation of myogenic satellite cells and in the adipogenesis of preadipocytes, indicating the involvement of different molecular mechanisms in these processes. Induction of CD36 and FABP4 expression in adipocyte-like cells and adipocytes may share a common pathway.
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Affiliation(s)
- Eun Ju Lee
- School of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea
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25
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Weber CM, Martindale MQ, Tapscott SJ, Unguez GA. Activation of Pax7-positive cells in a non-contractile tissue contributes to regeneration of myogenic tissues in the electric fish S. macrurus. PLoS One 2012; 7:e36819. [PMID: 22685526 PMCID: PMC3365140 DOI: 10.1371/journal.pone.0036819] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Accepted: 04/15/2012] [Indexed: 11/19/2022] Open
Abstract
The ability to regenerate tissues is shared across many metazoan taxa, yet the type and extent to which multiple cellular mechanisms come into play can differ across species. For example, urodele amphibians can completely regenerate all lost tissues, including skeletal muscles after limb amputation. This remarkable ability of urodeles to restore entire limbs has been largely linked to a dedifferentiation-dependent mechanism of regeneration. However, whether cell dedifferentiation is the fundamental factor that triggers a robust regeneration capacity, and whether the loss or inhibition of this process explains the limited regeneration potential in other vertebrates is not known. Here, we studied the cellular mechanisms underlying the repetitive regeneration of myogenic tissues in the electric fish S. macrurus. Our in vivo microinjection studies of high molecular weight cell lineage tracers into single identified adult myogenic cells (muscle or noncontractile muscle-derived electrocytes) revealed no fragmentation or cellularization proximal to the amputation plane. In contrast, ultrastructural and immunolabeling studies verified the presence of myogenic stem cells that express the satellite cell marker Pax7 in mature muscle fibers and electrocytes of S. macrurus. These data provide the first example of Pax-7 positive muscle stem cells localized within a non-contractile electrogenic tissue. Moreover, upon amputation, Pax-7 positive cells underwent a robust replication and were detected exclusively in regions that give rise to myogenic cells and dorsal spinal cord components revealing a regeneration process in S. macrurus that is dependent on the activation of myogenic stem cells for the renewal of both skeletal muscle and the muscle-derived electric organ. These data are consistent with the emergent concept in vertebrate regeneration that different tissues provide a distinct progenitor cell population to the regeneration blastema, and these progenitor cells subsequently restore the original tissue.
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Affiliation(s)
- Christopher M. Weber
- Biology Department, New Mexico State University, Las Cruces, New Mexico, United States of America
| | - Mark Q. Martindale
- Kewalo Marine Lab, University of Hawaii, Honolulu, Hawaii, United States of America
| | - Stephen J. Tapscott
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Graciela A. Unguez
- Biology Department, New Mexico State University, Las Cruces, New Mexico, United States of America
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26
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Lee EJ, Kamli MR, Bhat AR, Pokharel S, Lee DM, Kim SH, Kim TIL, Hong S, Choi I. Effect of porcine placenta steroid extract on myogenic satellite cell proliferation, transdifferentiation, and lipid accumulation. In Vitro Cell Dev Biol Anim 2012; 48:326-33. [DOI: 10.1007/s11626-012-9512-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 04/10/2012] [Indexed: 10/28/2022]
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27
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Lee EJ, Bajracharya P, Lee DM, Kang SW, Lee YS, Lee HJ, Hong SK, Chang J, Kim JW, Schnabel RD, Taylor JF, Choi I. Gene expression profiles during differentiation and transdifferentiation of bovine myogenic satellite cells. Genes Genomics 2012. [DOI: 10.1007/s13258-011-0096-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Wang XQ, Yang WJ, Yang Z, Shu G, Wang SB, Jiang QY, Yuan L, Wu TS. The differential proliferative ability of satellite cells in Lantang and Landrace pigs. PLoS One 2012; 7:e32537. [PMID: 22427853 PMCID: PMC3302802 DOI: 10.1371/journal.pone.0032537] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Accepted: 01/30/2012] [Indexed: 12/15/2022] Open
Abstract
Here, for the first time, we evaluate the hypothesis that the proliferative abilities of satellite cells (SCs) isolated from Lantang (indigenous Chinese pigs) and Landrace pigs, which differ in muscle characteristics, are different. SCs were isolated from the longissimus dorsi muscle of neonatal Lantang and Landrace pigs. Proliferative ability was estimated by the count and proliferative activity of viable cells using a hemocytometer and MTT assay at different time points after seeding, respectively. Cell cycle information was detected by flow cytometry. Results showed that there was a greater (P<0.05) number of SCs in Lantang pigs compared with Landrace pigs after 72 h of culture. The percentage of cell population in S phase and G2/M phases in Lantang pigs were higher (P<0.05), while in G0/G1 phase was lower (P<0.05) in comparison with the Landrace pigs. The mRNA abundances of MyoD, Myf5, myogenin and Pax7 in SCs from Lantang pigs were higher (P<0.05), while those of myostatin, Smad3 and genes in the mammalian target of rapamycin (mTOR) pathway (with the exception of 4EBP1) were lower (P<0.05) than the Landrace pigs. Protein levels of MyoD, myogenin, myostatin, S6K, phosphorylated mTOR and phosphorylated eIF4E were consistent with the corresponding mRNA abundance. Collectively, these findings suggested that SCs in the two breeds present different proliferative abilities, and the proliferative potential of SCs in Lantang pigs is higher than in Landrace pigs.
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Affiliation(s)
- Xiu-qi Wang
- College of Animal Science, South China Agricultural University, Guangzhou, Guangdong Province, China.
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29
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Albrecht E, Gotoh T, Ebara F, Xu J, Viergutz T, Nürnberg G, Maak S, Wegner J. Cellular conditions for intramuscular fat deposition in Japanese Black and Holstein steers. Meat Sci 2011; 89:13-20. [DOI: 10.1016/j.meatsci.2011.03.012] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 02/22/2011] [Accepted: 03/11/2011] [Indexed: 10/18/2022]
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30
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Lee DM, Bajracharya P, Lee EJ, Kim JE, Lee HJ, Chun T, Kim J, Cho KH, Chang J, Hong S, Choi I. Effects of gender-specific adult bovine serum on myogenic satellite cell proliferation, differentiation and lipid accumulation. In Vitro Cell Dev Biol Anim 2011; 47:438-44. [PMID: 21614650 DOI: 10.1007/s11626-011-9427-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 05/11/2011] [Indexed: 11/29/2022]
Abstract
The study was performed to explore the effects of adult bovine male serum (MS), female serum (FS), and castrated male serum (C-MS) on myogenic satellite cells (MSCs) proliferation and differentiation into myotubes or into adipocyte-like cells (ALCs). MSC proliferation and differentiation was highest in the medium supplemented with MS, implying the important role of male steroid hormones. Myogenin and desmin were highly upregulated in cells cultured in MS-supplemented medium. In contrast, lipid accumulation in ALCs was highest in the medium supplemented with FS. Fatty acid transporter (FAT/CD36) was upregulated in FS-supplemented cultures. Detection of higher FAT/CD36 inducing fatty acids (arachidic acid and eicosapentaenoic acid) in FS compared with MS and C-MS suggests that these fatty acids may have influenced the enhanced formation of lipid droplets in ALCs. Effect of sex steroids on cell proliferation and cell growth of bovine MSCs and C2C12 cell in C-MS was greater than charcoal-dextran-treated fetal bovine serum (CDFBS). Concluding the above facts, the results indicate that each gender-specific bovine serum constitutes of different component, which leads to unique effects on cell behavior.
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Affiliation(s)
- Dong-Mok Lee
- School of Biotechnology, Yeungnam University, Gyeongsan, South Korea
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31
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Starkey JD, Yamamoto M, Yamamoto S, Goldhamer DJ. Skeletal muscle satellite cells are committed to myogenesis and do not spontaneously adopt nonmyogenic fates. J Histochem Cytochem 2011; 59:33-46. [PMID: 21339173 DOI: 10.1369/jhc.2010.956995] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The developmental potential of skeletal muscle stem cells (satellite cells) remains controversial. The authors investigated satellite cell developmental potential in single fiber and clonal cultures derived from MyoD(iCre/+);R26R(EYFP/+) muscle, in which essentially all satellite cells are permanently labeled. Approximately 60% of the clones derived from cells that co-purified with muscle fibers spontaneously underwent adipogenic differentiation. These adipocytes stained with Oil-Red-O and expressed the terminal differentiation markers, adipsin and fatty acid binding protein 4, but did not express EYFP and were therefore not of satellite cell origin. Satellite cells mutant for either MyoD or Myf-5 also maintained myogenic programming in culture and did not adopt an adipogenic fate. Incorporation of additional wash steps prior to muscle fiber plating virtually eliminated the non-myogenic cells but did not reduce the number of adherent Pax7+ satellite cells. More than half of the adipocytes observed in cultures from Tie2-Cre mice were recombined, further demonstrating a non-satellite cell origin. Under adipogenesis-inducing conditions, satellite cells accumulated cytoplasmic lipid but maintained myogenic protein expression and did not fully execute the adipogenic differentiation program, distinguishing them from adipocytes observed in muscle fiber cultures. The authors conclude that skeletal muscle satellite cells are committed to myogenesis and do not spontaneously adopt an adipogenic fate.
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Affiliation(s)
- Jessica D Starkey
- Department of Molecular and Cell Biology, Center for Regenerative Biology, University of Connecticut Stem Cell Institute, University of Connecticut, Storrs, Connecticut, USA
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32
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Redshaw Z, McOrist S, Loughna P. Muscle origin of porcine satellite cells affects in vitro differentiation potential. Cell Biochem Funct 2010; 28:403-11. [PMID: 20589736 DOI: 10.1002/cbf.1670] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Post-natal muscle regeneration relies on the activation of tissue stem cells known as satellite cells, to repair damage following exercise trauma and disease. Satellite cells from individual muscles are known to be heterogeneous with regard to proliferation, fusion and transplantation abilities, although the muscle origin has rarely been considered pertinent to their differentiation capabilities. In this study we compared the potential of two functionally distinct skeletal muscle satellite cell populations from porcine diaphragm and hind-limb semi-membranosus muscles. These two muscles were chosen primarily for differences in metabolic and contractile properties: the diaphragm is more continuously active and has a greater oxidative capacity. Cells were induced to differentiate towards myogenic and adipogenic lineages, and here we have shown that cells from diaphragm exhibit a significantly greater degree of myogenesis compared with those from semi-membranosus, while the converse was true for adipogenesis. Unexpectedly, both conditions generated small numbers of cells with neuronal characteristics for both muscle types, although more so in cells derived from the diaphragm. With increased interest in muscle adiposity with age and disease, these findings suggest that muscle origin of satellite cells does affect lineage fate, however whether differences in developmental origin or metabolic activity of the parent tissue govern this, remains to be determined.
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Affiliation(s)
- Zoe Redshaw
- School of Veterinary Medicine and Science, The University of Nottingham, Sutton Bonington, Leicestershire, UK.
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33
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Deiuliis J, Shin J, Murphy E, Kronberg SL, Eastridge ML, Suh Y, Yoon JT, Lee K. Bovine adipose triglyceride lipase is not altered and adipocyte fatty acid-binding protein is increased by dietary flaxseed. Lipids 2010; 45:963-73. [PMID: 20886305 DOI: 10.1007/s11745-010-3476-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 09/14/2010] [Indexed: 12/25/2022]
Abstract
In this paper, we report the full-length coding sequence of bovine ATGL cDNA and analyze its expression in bovine tissues. Similar to human, mouse, and pig ATGL sequences, bovine ATGL has a highly conserved patatin domain that is necessary for lipolytic function in mice and humans. This suggests that ATGL is functionally intact as a triglyceride lipase in cattle. Tissue distribution of ATGL gene expression was highest in fat and muscle (skeletal and cardiac) tissue, while protein expression was solely detectible in the adipose tissue. The effect of 109 days of flaxseed supplementation on ATGL and adipocyte fatty acid-binding protein (FABP4 or A-FABP, E-FABP or FABP5) expression was examined in Angus steers. Supplemented steers had greater triacylglycerol (TAG) content in the muscle compared with unsupplemented ones. Additionally, supplementation increased A-FABP expression and decreased stearoyl-CoA desaturase 1 (SCD-1) expression in muscle, while total ATGL expression was unaffected. In summary, supplementation of cattle rations with flaxseed increased muscle TAG concentrations attributed in part to increased expression of key enzymes involved in lipid trafficking (A-FABP) and metabolism (SCD-1).
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Affiliation(s)
- Jeffrey Deiuliis
- Department of Animal Sciences and The Ohio State University Interdisciplinary Human Nutrition Program, The Ohio State University, Columbus, OH, USA
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34
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Lee EJ, Shin YM, Lee HJ, Yoon DH, Chun TH, Lee YS, Choi IH. Identification of Cuts-specific Myogenic Marker Genes in Hanwoo by DNA Microarray. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2010. [DOI: 10.5187/jast.2010.52.4.329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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35
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Dodson MV, Hausman GJ, Guan L, Du M, Rasmussen TP, Poulos SP, Mir P, Bergen WG, Fernyhough ME, McFarland DC, Rhoads RP, Soret B, Reecy JM, Velleman SG, Jiang Z. Skeletal muscle stem cells from animals I. Basic cell biology. Int J Biol Sci 2010; 6:465-74. [PMID: 20827399 PMCID: PMC2935669 DOI: 10.7150/ijbs.6.465] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Accepted: 08/27/2010] [Indexed: 01/14/2023] Open
Abstract
Skeletal muscle stem cells from food-producing animals are of interest to agricultural life scientists seeking to develop a better understanding of the molecular regulation of lean tissue (skeletal muscle protein hypertrophy) and intramuscular fat (marbling) development. Enhanced understanding of muscle stem cell biology and function is essential for developing technologies and strategies to augment the metabolic efficiency and muscle hypertrophy of growing animals potentially leading to greater efficiency and reduced environmental impacts of animal production, while concomitantly improving product uniformity and consumer acceptance and enjoyment of muscle foods.
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Affiliation(s)
- Michael V Dodson
- Department of Animal Sciences, Washington State University, Pullman, WA 99164, USA.
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36
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Yue T, Yin J, Li F, Li D, Du M. High glucose induces differentiation and adipogenesis in porcine muscle satellite cells via mTOR. BMB Rep 2010; 43:140-5. [DOI: 10.5483/bmbrep.2010.43.2.140] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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37
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Intramuscular fat content in meat-producing animals: development, genetic and nutritional control, and identification of putative markers. Animal 2010; 4:303-19. [PMID: 22443885 DOI: 10.1017/s1751731109991091] [Citation(s) in RCA: 494] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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38
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Clonal characterization of rat muscle satellite cells: proliferation, metabolism and differentiation define an intrinsic heterogeneity. PLoS One 2010; 5:e8523. [PMID: 20049087 PMCID: PMC2796166 DOI: 10.1371/journal.pone.0008523] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Accepted: 11/26/2009] [Indexed: 12/20/2022] Open
Abstract
Satellite cells (SCs) represent a distinct lineage of myogenic progenitors responsible for the postnatal growth, repair and maintenance of skeletal muscle. Distinguished on the basis of their unique position in mature skeletal muscle, SCs were considered unipotent stem cells with the ability of generating a unique specialized phenotype. Subsequently, it was demonstrated in mice that opposite differentiation towards osteogenic and adipogenic pathways was also possible. Even though the pool of SCs is accepted as the major, and possibly the only, source of myonuclei in postnatal muscle, it is likely that SCs are not all multipotent stem cells and evidences for diversities within the myogenic compartment have been described both in vitro and in vivo. Here, by isolating single fibers from rat flexor digitorum brevis (FDB) muscle we were able to identify and clonally characterize two main subpopulations of SCs: the low proliferative clones (LPC) present in major proportion (approximately 75%) and the high proliferative clones (HPC), present instead in minor amount (approximately 25%). LPC spontaneously generate myotubes whilst HPC differentiate into adipocytes even though they may skip the adipogenic program if co-cultured with LPC. LPC and HPC differ also for mitochondrial membrane potential (DeltaPsi(m)), ATP balance and Reactive Oxygen Species (ROS) generation underlying diversities in metabolism that precede differentiation. Notably, SCs heterogeneity is retained in vivo. SCs may therefore be comprised of two distinct, though not irreversibly committed, populations of cells distinguishable for prominent differences in basal biological features such as proliferation, metabolism and differentiation. By these means, novel insights on SCs heterogeneity are provided and evidences for biological readouts potentially relevant for diagnostic purposes described.
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39
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Chung KY, Johnson BJ. Melengestrol acetate enhances adipogenic gene expression in cultured muscle-derived cells. J Anim Sci 2009; 87:3897-904. [DOI: 10.2527/jas.2008-1645] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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40
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Abstract
Lipases are acyl hydrolases that represent a diverse group of enzymes present in organisms ranging from prokaryotes to humans. This article focuses on an evolutionarily related family of extracellular lipases that include lipoprotein lipase, hepatic lipase and endothelial lipase. As newly synthesized proteins, these lipases undergo a series of co- and post-translational maturation steps occurring in the endoplasmic reticulum, including glycosylation and glycan processing, and protein folding and subunit assembly. This article identifies and discusses mechanisms that direct early and late events in lipase folding and assembly. Lipase maturation employs the two general chaperone systems operating in the endoplasmic reticulum, as well as a recently identified lipase-specific chaperone termed lipase maturation factor 1. We propose that the two general chaperone systems act in a coordinated manner early in lipase maturation in order to help create partially folded monomers; lipase maturation factor 1 then facilitates final monomer folding and subunit assembly into fully functional homodimers. Once maturation is complete, the lipases exit the endoplasmic reticulum and are secreted to extracellular sites, where they carry out a number of functions related to lipoprotein and lipid metabolism.
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Affiliation(s)
- Mark H Doolittle
- VA Greater Los Angeles, Healthcare System, 11301 Wilshire Blvd, Bldg 113, Rm 312, Los Angeles, CA 90073, USA, Tel.: +1 661 433 6349
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41
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Yun JH, Bong JJ, Myung K, Baik M. Correlations between carcass traits and mRNA levels of CGI-105 and CCAAT/enhancer protein α genes in steers of Korean cattle. Livest Sci 2009. [DOI: 10.1016/j.livsci.2008.06.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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Pirih FQ, Abayahoudian R, Elashoff D, Parhami F, Nervina JM, Tetradis S. Nuclear receptor profile in calvarial bone cells undergoing osteogenic versus adipogenic differentiation. J Cell Biochem 2008; 105:1316-26. [PMID: 18810760 PMCID: PMC5391254 DOI: 10.1002/jcb.21931] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Nuclear receptors (NRs) are key regulators of cell function and differentiation. We examined NR expression during osteogenic versus adipogenic differentiation of primary mouse calvarial osteoblasts (MOBs). MOBs were cultured for 21 days in osteogenic or adipogenic differentiation media. von Kossa and Oil Red O staining, and qRT-PCR of marker genes and 49 NRs were performed. PCR amplicons were subcloned to establish correct sequences and absolute standard curves. Forty-three NRs were detected at days 0-21. Uncentered average linkage hierarchical clustering identified four expression clusters: NRs (1) upregulated during osteogenic, but not adipogenic, differentiation, (2) upregulated in both conditions, with greater upregulation during adipogenic differentiation, (3) upregulated equally in both conditions, (4) downregulated during adipogenic, but not osteogenic, differentiation. One-way ANOVA with contrast revealed 20 NRs upregulated during osteogenic differentiation and 12 NRs upregulated during adipogenic differentiation. Two-way ANOVA demonstrated that 18 NRs were higher in osteogenic media, while 9 NRs were higher in adipogenic media. The time effect revealed 16 upregulated NRs. The interaction of condition with time revealed 6 NRs with higher expression rate during adipogenic differentiation and 3 NRs with higher expression rate during osteogenic differentiation. Relative NR abundance at days 0 and 21 were ranked. Basal ranking changed at least 5 positions for 13 NRs in osteogenic media and 9 NRs in adipogenic media. Osteogenic and adipogenic differentiation significantly altered NR expression in MOBs. These differences offer a fingerprint of cellular commitment and may provide clues to the underlying mechanisms of osteogenic versus adipogenic differentiation.
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Affiliation(s)
- Flavia Q. Pirih
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan 48109
| | - Rosette Abayahoudian
- Division of Diagnostic and Surgical Sciences, UCLA, Los Angeles, California 90095
| | - David Elashoff
- Department of Biostatistics/Nursing, UCLA, Los Angeles, California 90095
| | - Farhad Parhami
- Department of Cardiology, UCLA, Los Angeles, California 90095
| | | | - Sotirios Tetradis
- Division of Diagnostic and Surgical Sciences, UCLA, Los Angeles, California 90095
- Molecular Biology Institute, UCLA, Los Angeles, California 90095
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43
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Smith SB, Kawachi H, Choi CB, Choi CW, Wu G, Sawyer JE. Cellular regulation of bovine intramuscular adipose tissue development and composition. J Anim Sci 2008; 87:E72-82. [PMID: 18997081 DOI: 10.2527/jas.2008-1340] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It is well documented that grain feeding stimulates adipogenesis in beef cattle, whereas pasture feeding depresses the development of adipose tissues, including intramuscular (i.m.) adipose tissue. Additionally, production practices that depress adipocyte differentiation also limit the synthesis of MUFA. Marbling scores and MUFA increase in parallel suggesting that stearoyl-coenzyme A desaturase (SCD) gene expression is closely associated with and necessary for marbling adipocyte differentiation. Similarly, marbling scores and fatty acid indices of SCD activity are depressed in response to dietary vitamin A restriction. In bovine preadipocytes, vitamins A and D both decrease glycerol-3-phosphate dehydrogenase (GPDH) activity, an index of adipocyte differentiation, whereas incubation of bovine preadipocytes with l-ascorbic acid-2-phosphate increases GPDH activity. Exposing bovine preadipocytes to zinc also stimulates adipogenesis, putatively by inhibiting nitric oxide (NO) production. However, incubation of bovine preadipocytes with arginine, a biological precursor of NO, strongly promotes differentiation in concert with increased SCD expression. This suggests that the effect of either arginine or zinc on adipogenesis is independent of NO synthesis in bovine preadipocytes. Enhanced expression of SCD is associated with a greater accumulation of MUFA both in bovine preadipocyte cultures and during development in growing steers. In bovine preadipocytes, trans-10, cis-12 CLA strongly depresses adipocyte differentiation and SCD gene expression, thereby reducing MUFA concentrations. The bovine preadipocyte culture studies suggest that any production practice that elevates vitamins A or D or trans-10, cis-12 CLA in bovine adipose tissue will reduce i.m. adipose tissue development. Conversely, supplementation with vitamin C or zinc may promote the development of i.m. adipose tissue.
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Affiliation(s)
- S B Smith
- Department of Animal Science, Texas A&M University, College Station, TX 77843-2471, USA.
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Chung KY, Johnson BJ. Application of cellular mechanisms to growth and development of food producing animals1,2. J Anim Sci 2008; 86:E226-35. [DOI: 10.2527/jas.2007-0450] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Hausman GJ, Poulos SP, Pringle TD, Azain MJ. The influence of thiazolidinediones on adipogenesis in vitro and in vivo: Potential modifiers of intramuscular adipose tissue deposition in meat animals1,2. J Anim Sci 2008; 86:E236-43. [PMID: 17686902 DOI: 10.2527/jas.2007-0219] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Thiazolidinediones (TZD) are insulin sensitizing agents currently used for the treatment of type 2 diabetes and are widely used as adipogenic agents because they are ligands of peroxisome proliferator-activated receptor gamma (PPARgamma), a key adipogenic transcription factor. In vivo and in vitro studies of TZD as potential modifiers of intramuscular or marbling adipogenesis are reviewed. Thiazolidinedione-induced adipogenesis has been reported in numerous cell culture systems, including rodent, human, bovine, and porcine adipose tissue stromal-vascular (S-V) cell cultures. Studies of porcine S-V cell cultures derived from semitendinosus muscle show that TZD can potentially modify intramuscular or marbling adipogenesis. Preadipocyte recruitment was TZD-dependent in muscle S-V cultures but TZD-independent in adipose S-V cultures. There appear to be differences between adipocytes in muscle and subcutaneous adipose tissue, reminiscent of differences observed in adipocytes from different adipose tissue depots. Troglitazone, a TZD, induces marbling adipogenesis without inhibiting myogenesis when cells are grown on laminin precoated culture dishes. Additionally, troglitazone treatment does not increase lipid content in porcine adipose tissue or muscle S-V cell cultures. Thiazolidinedione treatment increases lipid content of muscle in rodents and humans; however, rosiglitazone treatment for 49 d in pigs did not influence muscle lipid content and meat quality, but several significant changes in muscle fatty acid composition were observed. Although timing of treatment with TZD needs to be optimized, evidence suggests these compounds may enhance marbling deposition in swine.
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Sun S, Wang Z, Hao Y. Osterix overexpression enhances osteoblast differentiation of muscle satellite cells in vitro. Int J Oral Maxillofac Surg 2008; 37:350-6. [PMID: 18272339 DOI: 10.1016/j.ijom.2007.11.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2007] [Revised: 09/15/2007] [Accepted: 11/28/2007] [Indexed: 11/30/2022]
Abstract
Muscle satellite cells have long been considered a distinct myogenic lineage responsible for postnatal growth, repair and maintenance of skeletal muscle. Recent studies have demonstrated that they are multi-potential. Osterix (Osx), a novel zinc-finger-containing transcription factor of the sp family, is required for osteoblast differentiation and bone formation. It was hypothesized that Osx overexpression would enhance osteoblast differentiation of muscle satellite cells in vitro. Recombinant adenovirus-mediated Osx gene (Ad-Osx) was constructed and used to transfect muscle satellite cells. Osx overexpression inhibited myogenesis, as demonstrated by suppression of MyoD and myogenin mRNA levels and reduced myotube formation. Muscle satellite cells transduced with Ad-Osx exhibited apparent osteoblast differentiation as determined by the expression of related osteoblastic genes, increased activity of alkaline phosphatase and the formation of mineralized nodules. These results confirmed the ability of Osx to enhance osteoblast differentiation of muscle satellite cells in vitro, and the competence of muscle satellite cells as promising seed cells for bone tissue engineering.
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Affiliation(s)
- S Sun
- Department of Oral and Maxillofacial Surgery, School of Stomatology, Tongji University, Shanghai, China
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Fernyhough ME, Okine E, Hausman G, Vierck JL, Dodson MV. PPARgamma and GLUT-4 expression as developmental regulators/markers for preadipocyte differentiation into an adipocyte. Domest Anim Endocrinol 2007; 33:367-78. [PMID: 17560753 DOI: 10.1016/j.domaniend.2007.05.001] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2007] [Revised: 05/07/2007] [Accepted: 05/08/2007] [Indexed: 12/25/2022]
Abstract
In this document, we have integrated knowledge about two major cellular markers found in cells of the adipocyte lineage (an adipogenic marker and a metabolic marker). This review provides information as to how differentiation of a cell (such as an adipofibroblast, fibroblast or preadipocyte) to become a viable (and new) adipocyte is under different regulation than that experienced by an immature adipocyte that is just beginning to accumulate lipid. The differentiation, prior to lipid-filling, involves PPARgamma. Subsequently, lipid-filling of the adipocyte relies on a late subset of genes and, depending on depot specificity, involves GLUT-4 or any number of other metabolic markers.
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Affiliation(s)
- M E Fernyhough
- Department of Animal Sciences, Washington State University, PO Box 646310, Pullman, WA 99164, United States
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Johnson BJ, Chung KY. Alterations in the physiology of growth of cattle with growth-enhancing compounds. Vet Clin North Am Food Anim Pract 2007; 23:321-32, viii. [PMID: 17606154 DOI: 10.1016/j.cvfa.2007.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Commonly used growth promotants such as steroidal implants and beta-adrenergic agonists have recently been implicated in the reduction of marbling scores in beef cattle. These compounds are effective at improving lean tissue deposition in cattle, thus significantly improving feed efficiency. This article discusses skeletal muscle growth and development in cattle, the process of transdifferentiation between two cell types, and how growth promotants may push a nondifferentiated cell to become a certain lineage of cells. Increased understanding of how these agents affect cellular aspects of growth and development of skeletal muscle and adipose tissue will allow cattle feeders, consultants, and researchers to instigate intervention strategies to ameliorate the reduced marbling scores. Successful strategies would allow maximal lean tissue growth and result in carcasses with optimal quality.
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Affiliation(s)
- Bradley J Johnson
- Nutritional Growth and Development, Department of Animal Sciences and Industry, Kansas State University, Manhattan, KS 66506-1600, USA.
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