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Toma T, Miyakawa N, Arakaki Y, Watanabe T, Nakahara R, Ali TFS, Biswas T, Todaka M, Kondo T, Fujita M, Otsuka M, Araki E, Tateishi H. An antifibrotic compound that ameliorates hyperglycaemia and fat accumulation in cell and HFD mouse models. Diabetologia 2024:10.1007/s00125-024-06260-y. [PMID: 39251430 DOI: 10.1007/s00125-024-06260-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 06/03/2024] [Indexed: 09/11/2024]
Abstract
AIMS/HYPOTHESIS Appropriate management of blood glucose levels and the prevention of complications are important in the treatment of diabetes. We have previously reported on a compound named HPH-15 that is not only antifibrotic but also AMP-activated protein kinase (AMPK)-activating. In this study, we evaluated whether HPH-15 is useful as a therapeutic medication for diabetes. METHODS We examined the effects of HPH-15 on AMPK activation, glucose uptake, fat accumulation and lactic acid production in L6-GLUT4, HepG2 and 3T3-L1 cells, as a model of muscle, liver and fat tissue, respectively. Additionally, we investigated the glucose-lowering, fat-accumulation-suppressing, antifibrotic and AMPK-activating effect of HPH-15 in mice fed a high-fat diet (HFD). RESULTS HPH-15 at a concentration of 10 µmol/l increased AMPK activation, glucose uptake and membrane translocation of GLUT4 in each cell model to the same extent as metformin at 2 mmol/l. The production of lactic acid (which causes lactic acidosis) in HPH-15-treated cells was equal to or less than that observed in metformin-treated cells. In HFD-fed mice, HPH-15 lowered blood glucose from 11.1±0.3 mmol/l to 8.2±0.4 mmol/l (10 mg/kg) and 7.9±0.4 mmol/l (100 mg/kg) and improved insulin resistance. The HPH-15 (10 mg/kg) group showed the same level of AMPK activation as the metformin (300 mg/kg) group in all organs. The HPH-15-treated HFD-fed mice also showed suppression of fat accumulation and fibrosis in the liver and fat tissue; these effects were more significant than those obtained with metformin. Mice treated with high doses of HPH-15 also exhibited a 44% reduction in subcutaneous fat. CONCLUSIONS/INTERPRETATION HPH-15 activated AMPK at lower concentrations than metformin in vitro and in vivo and improved blood glucose levels and insulin resistance in vivo. In addition, HPH-15 was more effective than metformin at ameliorating fatty liver and adipocyte hypertrophy in HFD-fed mice. HPH-15 could be effective in preventing fatty liver, a common complication in diabetic individuals. Additionally, in contrast to metformin, high doses of HPH-15 reduced subcutaneous fat in HFD-fed mice. Presumably, HPH-15 has a stronger inhibitory effect on fat accumulation and fibrosis than metformin, accounting for the reduction of subcutaneous fat. Therefore, HPH-15 is potentially a glucose-lowering medication that can lower blood glucose, inhibit fat accumulation and ameliorate liver fibrosis.
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Affiliation(s)
- Tsugumasa Toma
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Nobukazu Miyakawa
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Yuiichi Arakaki
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Takuro Watanabe
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Ryosei Nakahara
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Taha F S Ali
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Tanima Biswas
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | | | - Tatsuya Kondo
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Mikako Fujita
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Masami Otsuka
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
- Research and Development, Science Farm Ltd, Kumamoto, Japan
| | - Eiichi Araki
- Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.
- Kikuchi Medical Association Hospital, Kumamoto, Japan.
- Research Center for Health and Sport Sciences, Kumamoto Health Science University, Kumamoto, Japan.
| | - Hiroshi Tateishi
- Medicinal and Biological Chemistry Science Farm Joint Research Laboratory, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.
- Research and Development Department, Research and Development Headquarters, Hirata Corporation, Kumamoto, Japan.
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Varmazyar I, Monazzami AA, Moradi M, McAinch AJ. Effects of 12-weeks resistance training and vitamin E supplementation on aminotransferases, CTRP-2, and CTRP-9 levels in males with nonalcoholic fatty liver disease: a double-blind, randomized trial. BMC Sports Sci Med Rehabil 2024; 16:185. [PMID: 39232815 PMCID: PMC11373101 DOI: 10.1186/s13102-024-00972-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Accepted: 08/22/2024] [Indexed: 09/06/2024]
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) involves excessive liver fat accumulation and is closely linked to oxidative stress, which contributes to liver inflammation and damage. This study aimed to evaluate how interventions such as resistance training (RT) and vitamin E supplementation (VES) can modulate markers of NAFLD and key proteins regulating glucose and lipid metabolism, such as C1Q/TNF-related proteins (CTRPs). METHODS Forty participants with NAFLD (mean age: 32.4 ± 8.2 years) were randomly assigned to one of four groups for 12 weeks: placebo (PLB), VES, PLB + RT, and VES + RT. VES was administered at 800 IU/day in a double-blind manner. The RT regimen included eight exercises at 60-80% of one-repetition maximum (1RM), with three sets of 8-12 repetitions, performed three times per week. Pre- and post-intervention assessments included body composition, aspartate aminotransferase (AST), alanine aminotransferase (ALT), lipid profile, glycemic control, CTRP-2, CTRP-9, and 1RM evaluations. RESULTS Following the interventions, there was a significant improvement in body composition, lipid profile, glycemic control, and 1RM indices in the exercise groups compared to non-exercise groups (p < 0.05). AST and ALT levels decreased in all groups (p < 0.05) compared to the PLB group. There was also a significant difference between the VES + RT group and both the VES and PLB + RT groups (p < 0.05). CTRP-2 and CTRP-9 levels decreased in the exercise groups compared to non-exercise groups (p < 0.05), and their changes showed a marked correlation with body composition, lipid profile, and glycemic control indices (p < 0.05). CONCLUSIONS This study highlights the benefits of RT on various health parameters among NAFLD patients. While adding VES to RT resulted in greater decreases in aminotransferases, it did not provide further improvements in other variables. Additionally, enhancements in body composition, lipid profile, and glycemic control indices were possibly associated with decreased levels of CTRPs. TRIAL REGISTRATION Registered retrospectively in the Iranian Registry of Clinical Trials (IRCT20220601055056N1) on December 21, 2023. Access at https://irct.behdasht.gov.ir/trial/69231 .
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Affiliation(s)
- Irfan Varmazyar
- Department of Sport Physiology, Faculty of Sport Sciences, Razi University, Kermanshah, Iran
| | - Amir Abbas Monazzami
- Department of Sport Physiology, Faculty of Sport Sciences, Razi University, Kermanshah, Iran.
| | - Mozhgan Moradi
- Department of Internal Medicine, Faculty of Medicine, University of Medical Sciences, Kermanshah, Iran
| | - Andrew J McAinch
- Institute for Health and Sport, Victoria University, Melbourne, Australia
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Chen F, Sarver DC, Saqib M, Zhou M, Aja S, Seldin MM, Wong GW. CTRP13 ablation improves systemic glucose and lipid metabolism. Mol Metab 2023; 78:101824. [PMID: 37844630 PMCID: PMC10598410 DOI: 10.1016/j.molmet.2023.101824] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/30/2023] [Accepted: 10/11/2023] [Indexed: 10/18/2023] Open
Abstract
OBJECTIVE Tissue crosstalk mediated by secreted hormones underlies the integrative control of metabolism. We previously showed that CTRP13/C1QL3, a secreted protein of the C1q family, can improve glucose metabolism and insulin action in vitro and reduce food intake and body weight in mice when centrally delivered. A role for CTRP13 in regulating insulin secretion in isolated islets has also been demonstrated. It remains unclear, however, whether the effects of CTRP13 on cultured cells and in mice reflect the physiological function of the protein. Here, we use a loss-of-function mouse model to address whether CTRP13 is required for metabolic homeostasis. METHODS WT and Ctrp13 knockout (KO) mice fed a standard chow or a high-fat diet were subjected to comprehensive metabolic phenotyping. Transcriptomic analyses were carried out on visceral and subcutaneous fat, liver, and skeletal muscle to identify pathways altered by CTRP13 deficiency. RNA-seq data was further integrated with the Metabolic Syndrome in Man (METSIM) cohort data. Adjusted regression analysis was used to demonstrate that genetic variation of CTRP13 expression accounts for a significant proportion of variance between differentially expressed genes (DEGs) in adipose tissue and metabolic traits in humans. RESULTS Contrary to expectation, chow-fed Ctrp13-KO male mice had elevated physical activity, lower body weight, and improved lipid handling. On a high-fat diet (HFD), Ctrp13-KO mice of either sex were consistently more active and leaner. Loss of CTRP13 reduced hepatic glucose output and improved glucose tolerance, insulin sensitivity, and triglyceride clearance, though with notable sex differences. Consistent with the lean phenotype, transcriptomic analyses revealed a lower inflammatory profile in visceral fat and liver. Reduced hepatic steatosis was correlated with the suppression of lipid synthesis and enhanced lipid catabolism gene expression. Visceral fat had the largest number of DEGs and mediation analyses on the human orthologs of the DEGs suggested the potential causal contribution of CTRP13 to human metabolic syndrome. CONCLUSIONS Our results suggest that CTRP13 is a negative metabolic regulator, and its deficiency improves systemic metabolic profiles. Our data also suggest the reduction in circulating human CTRP13 levels seen in obesity and diabetes may reflect a compensatory physiologic response to counteract insulin resistance.
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Affiliation(s)
- Fangluo Chen
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dylan C Sarver
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Muzna Saqib
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mingqi Zhou
- Department of Biological Chemistry, University of California, Irvine, Irvine, USA; Center for Epigenetics and Metabolism, University of California, Irvine, Irvine, USA
| | - Susan Aja
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Marcus M Seldin
- Department of Biological Chemistry, University of California, Irvine, Irvine, USA; Center for Epigenetics and Metabolism, University of California, Irvine, Irvine, USA
| | - G William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Chen F, Sarver DC, Saqib M, Velez LM, Aja S, Seldin MM, Wong GW. Loss of CTRP10 results in female obesity with preserved metabolic health. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.01.565163. [PMID: 37961647 PMCID: PMC10635050 DOI: 10.1101/2023.11.01.565163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Obesity is a major risk factor for type 2 diabetes, dyslipidemia, cardiovascular disease, and hypertension. Intriguingly, there is a subset of metabolically healthy obese (MHO) individuals who are seemingly able to maintain a healthy metabolic profile free of metabolic syndrome. The molecular underpinnings of MHO, however, are not well understood. Here, we report that CTRP10/C1QL2-deficient mice represent a unique female model of MHO. CTRP10 modulates weight gain in a striking and sexually dimorphic manner. Female, but not male, mice lacking CTRP10 develop obesity with age on a low-fat diet while maintaining an otherwise healthy metabolic profile. When fed an obesogenic diet, female Ctrp10 knockout (KO) mice show rapid weight gain. Despite pronounced obesity, Ctrp10 KO female mice do not develop steatosis, dyslipidemia, glucose intolerance, insulin resistance, oxidative stress, or low-grade inflammation. Obesity is largely uncoupled from metabolic dysregulation in female KO mice. Multi-tissue transcriptomic analyses highlighted gene expression changes and pathways associated with insulin-sensitive obesity. Transcriptional correlation of the differentially expressed gene (DEG) orthologous in humans also show sex differences in gene connectivity within and across metabolic tissues, underscoring the conserved sex-dependent function of CTRP10. Collectively, our findings suggest that CTRP10 negatively regulates body weight in females, and that loss of CTRP10 results in benign obesity with largely preserved insulin sensitivity and metabolic health. This female MHO mouse model is valuable for understanding sex-biased mechanisms that uncouple obesity from metabolic dysfunction.
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Affiliation(s)
- Fangluo Chen
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Dylan C. Sarver
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Muzna Saqib
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Leandro M Velez
- Department of Biological Chemistry, University of California, Irvine, Irvine, USA
- Center for Epigenetics and Metabolism, University of California Irvine, Irvine, USA
| | - Susan Aja
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Marcus M. Seldin
- Department of Biological Chemistry, University of California, Irvine, Irvine, USA
- Center for Epigenetics and Metabolism, University of California Irvine, Irvine, USA
| | - G. William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Guo S, Mao X, Liu J. Multi-faceted roles of C1q/TNF-related proteins family in atherosclerosis. Front Immunol 2023; 14:1253433. [PMID: 37901246 PMCID: PMC10611500 DOI: 10.3389/fimmu.2023.1253433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/25/2023] [Indexed: 10/31/2023] Open
Abstract
Purpose of review C1q/TNF-related proteins (CTRPs) are involved in the modulation of the development and prognosis of atherosclerosis (AS). Here, we summarizes the pathophysiological roles of individual members of the CTRP superfamily in the development of AS. Currently, there is no specific efficacious treatment for AS-related diseases, therefore it is urgent to develop novel therapeutic strategies aiming to target key molecules involved in AS. Recent findings Recently, mounting studies verified the critical roles of the CTRP family, including CTRP1-7, CTRP9 and CTRP11-15, in the development and progression of AS by influencing inflammatory response, modulating glucose and lipid metabolism, regulating endothelial functions and the proliferation of vascular smooth muscle cells (VSMCs). Conclusions CTRP family regulate different pathophysiology stages of AS. CTRP3, CTRP9, CTRP12, CTRP13 and CTRP15 play a clear protective role in AS, while CTRP5 and CTRP7 play a pro-atherosclerotic role in AS. The remarkable progress in our understanding of CTRPs' role in AS will provide an attractive therapeutic target for AS.
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Affiliation(s)
- Shuren Guo
- Department of Clinical Laboratory, Key Clinical Laboratory of Henan Province, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiaohuan Mao
- Department of Clinical Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Jun Liu
- College of Life Science and Technology, Xinjiang University, Xinjiang, China
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Fan S, Yuan P, Li S, Li H, Zhai B, Li Y, Zhang H, Gu J, Li H, Tian Y, Kang X, Zhang Y, Li G. Genetic architecture and key regulatory genes of fatty acid composition in Gushi chicken breast muscle determined by GWAS and WGCNA. BMC Genomics 2023; 24:434. [PMID: 37537524 PMCID: PMC10398928 DOI: 10.1186/s12864-023-09503-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 07/03/2023] [Indexed: 08/05/2023] Open
Abstract
BACKGROUND Fatty acids composition in poultry muscle is directly related to its tenderness, flavour, and juiciness, whereas its genetic mechanisms have not been elucidated. In this study, the genetic structure and key regulatory genes of the breast muscle fatty acid composition of local Chinese chicken, Gushi-Anka F2 resource population by integrating genome-wide association study (GWAS) and weighted gene co-expression network analysis (WGCNA) strategies. GWAS was performed based on 323,306 single nucleotide polymorphisms (SNPs) obtained by genotyping by sequencing (GBS) method and 721 chickens from the Gushi-Anka F2 resource population with highly variable fatty acid composition traits in the breast muscle. And then, according to the transcriptome data of the candidate genes that were obtained and phenotypic data of fatty acid composition traits in breast muscle of Gushi chickens at 14, 22, and 30 weeks of age, we conducted a WGCNA. RESULTS A total of 128 suggestive significantly associated SNPs for 11 fatty acid composition traits were identified and mapped on chromosomes (Chr) 2, 3, 4, 5, 13, 17, 21, and 27. Of these, the two most significant SNPs were Chr13:5,100,140 (P = 4.56423e-10) and Chr13:5,100,173 (P = 4.56423e-10), which explained 5.6% of the phenotypic variation in polyunsaturated fatty acids (PUFA). In addition, six fatty acid composition traits, including C20:1, C22:6, saturated fatty acid (SFA), unsaturated fatty acids (UFA), PUFA, and average chain length (ACL), were located in the same QTL intervals on Chr13. We obtained 505 genes by scanning the linkage disequilibrium (LD) regions of all significant SNPs and performed a WGCNA based on the transcriptome data of the above 505 genes. Combining two strategies, 9 hub genes (ENO1, ADH1, ASAH1, ADH1C, PIK3CD, WISP1, AKT1, PANK3, and C1QTNF2) were finally identified, which could be the potential candidate genes regulating fatty acid composition traits in chicken breast muscle. CONCLUSION The results of this study deepen our understanding of the genetic mechanisms underlying the regulation of fatty acid composition traits, which is helpful in the design of breeding strategies for the subsequent improvement of fatty acid composition in poultry muscle.
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Affiliation(s)
- Shengxin Fan
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Pengtao Yuan
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Shuaihao Li
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Hongtai Li
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Bin Zhai
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Yuanfang Li
- School of Medicine and Health, Harbin Institute of Technology, Harbin, 150001, HeiLongJiang, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou, 450000, Henan, China
| | - Hongyuan Zhang
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Jinxin Gu
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Hong Li
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Yadong Tian
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
| | - Xiangtao Kang
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China
- The Shennong Laboratory, Zhengzhou, 450002, China
| | - Yanhua Zhang
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China.
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China.
| | - Guoxi Li
- College of Animal Science and Technology, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China.
- Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Henan Agricultural University, No.15 Longzihu University Area, Zhengzhou New District, Zhengzhou, 450002, China.
- The Shennong Laboratory, Zhengzhou, 450002, China.
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Complement 1q/Tumor Necrosis Factor-Related Proteins (CTRPs): Structure, Receptors and Signaling. Biomedicines 2023; 11:biomedicines11020559. [PMID: 36831095 PMCID: PMC9952994 DOI: 10.3390/biomedicines11020559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/10/2023] [Accepted: 02/11/2023] [Indexed: 02/17/2023] Open
Abstract
Adiponectin and the other 15 members of the complement 1q (C1q)/tumor necrosis factor (TNF)-related protein (CTRP) family are secreted proteins composed of an N-terminal variable domain followed by a stalk region and a characteristic C-terminal trimerizing globular C1q (gC1q) domain originally identified in the subunits of the complement protein C1q. We performed a basic PubMed literature search for articles mentioning the various CTRPs or their receptors in the abstract or title. In this narrative review, we briefly summarize the biology of CTRPs and focus then on the structure, receptors and major signaling pathways of CTRPs. Analyses of CTRP knockout mice and CTRP transgenic mice gave overwhelming evidence for the relevance of the anti-inflammatory and insulin-sensitizing effects of CTRPs in autoimmune diseases, obesity, atherosclerosis and cardiac dysfunction. CTRPs form homo- and heterotypic trimers and oligomers which can have different activities. The receptors of some CTRPs are unknown and some receptors are redundantly targeted by several CTRPs. The way in which CTRPs activate their receptors to trigger downstream signaling pathways is largely unknown. CTRPs and their receptors are considered as promising therapeutic targets but their translational usage is still hampered by the limited knowledge of CTRP redundancy and CTRP signal transduction.
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Saeidi A, Nouri-Habashi A, Razi O, Ataeinosrat A, Rahmani H, Mollabashi SS, Bagherzadeh-Rahmani B, Aghdam SM, Khalajzadeh L, Al Kiyumi MH, Hackney AC, Laher I, Heinrich KM, Zouhal H. Astaxanthin Supplemented with High-Intensity Functional Training Decreases Adipokines Levels and Cardiovascular Risk Factors in Men with Obesity. Nutrients 2023; 15:nu15020286. [PMID: 36678157 PMCID: PMC9866205 DOI: 10.3390/nu15020286] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 12/29/2022] [Accepted: 01/03/2023] [Indexed: 01/09/2023] Open
Abstract
The aim of this study was to investigate the effects of 12 weeks of high-intensity training with astaxanthin supplementation on adipokine levels, insulin resistance and lipid profiles in males with obesity. Sixty-eight males with obesity were randomly stratified into four groups of seventeen subjects each: control group (CG), supplement group (SG), training group (TG), and training plus supplement group (TSG). Participants underwent 12 weeks of treatment with astaxanthin or placebo (20 mg/d capsule daily). The training protocol consisted of 36 sessions of high-intensity functional training (HIFT), 60 min/sessions, and three sessions/week. Metabolic profiles, body composition, anthropometrical measurements, cardio-respiratory indices and adipokine [Cq1/TNF-related protein 9 and 2 (CTRP9 and CTRP2) levels, and growth differentiation factors 8 and 15 (GDF8 and GDF15)] were measured. There were significant differences for all indicators between the groups (p < 0.05). Post-hoc analysis indicated that the levels of CTRP9, CTRP2, and GDF8 were different from CG (p < 0.05), although levels of GDF15 were similar to CG (p > 0.05). Levels of GDF8 were similar in the SG and TG groups (p > 0.05), with reductions of GDF15 levels in both training groups (p < 0.05). A total of 12 weeks of astaxanthin supplementation and exercise training decreased adipokines levels, body composition (weight, %fat), anthropometrical factors (BMI), and improved lipid and metabolic profiles. These benefits were greater for men with obesity in the TSG group.
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Affiliation(s)
- Ayoub Saeidi
- Department of Physical Education and Sport Sciences, Faculty of Humanities and Social Sciences, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Akbar Nouri-Habashi
- Department of Exercise Physiology and Corrective Movements, Faculty of Sport Sciences, Urmia University, Urmia 57561-51818, Iran
- Correspondence: (A.N.-H.); (M.H.A.K.)
| | - Omid Razi
- Department of Exercise Physiology, Faculty of Physical Education and Sports Science, Razi University, Kermanshah 94Q5+6G3, Iran
| | - Ali Ataeinosrat
- Department of Physical Education and Sport Science, Science and Research Branch, Islamic Azad University, Tehran 14778-93855, Iran
| | - Hiwa Rahmani
- Faculty of Physical Education and Sports Science, Alzahra University, Tehran 19938 93973, Iran
| | | | - Behnam Bagherzadeh-Rahmani
- Department of Exercise Physiology, Faculty of Sport Sciences, Hakim Sabzevari University, Sabzevar M3J+373, Iran
| | - Shahin Mahmoudi Aghdam
- Department of Exercise Physiology, Central Tehran Branch, Islamic Azad University, Tehran 14778-93855, Iran
| | - Leila Khalajzadeh
- Department of Exercise Physiology, Central Tehran Branch, Islamic Azad University, Tehran 14778-93855, Iran
| | - Maisa Hamed Al Kiyumi
- Department of Family Medicine and Public Health, Sultan Qaboos University Hospital, Muscat H5QC+36M, Oman
- Correspondence: (A.N.-H.); (M.H.A.K.)
| | - Anthony C. Hackney
- Department of Exercise & Sport Science, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Nutrition, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Ismail Laher
- Department of Anesthesiology, Pharmacology and Therapeutics, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Katie M. Heinrich
- Department of Kinesiology, College of Health and Human Sciences, Kansas State University, Manhattan, KS 66506, USA
| | - Hassane Zouhal
- Laboratoire Mouvement, Sport, Santé, University of Rennes, M2S—EA 1274, 35000 Rennes, France
- Institut International des Sciences du Sport (2I2S), 35850 Irodouer, France
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Integrative Analysis of miRNAs Involved in Fat Deposition in Different Pig Breeds. Genes (Basel) 2022; 14:genes14010094. [PMID: 36672834 PMCID: PMC9859024 DOI: 10.3390/genes14010094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/17/2022] [Accepted: 12/20/2022] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND miRNAs are a set of small, noncoding RNAs that bind to partially complementary sequences on target mRNAs. This leads to the post-transcriptional regulation of gene expression. Many studies have shown that microRNAs play critical roles in adipose cell differentiation and fat metabolism. The aim of this study was to explore the regulatory functions of miRNAs in fat deposition for the prevention and therapy of lipid metabolism-related diseases. METHODS The significant differences in the fat deposition of Laiwu (LW) pigs and Large White (LY) pigs were studied. To investigate the genetic relationships of miRNAs that regulate fat deposition, we performed a genome-wide analysis of miRNAs derived from subcutaneous adipose tissue of LW and LY pigs using RNA-seq. RESULTS There were 39 known miRNAs and 56 novel miRNAs significantly differential expressed between the two breeds of pigs. In the analysis of the Gene Ontology and KEGG pathways, predicted targets of these differentially expressed miRNAs were involved in several fat-associated pathways, such as the peroxisome proliferator-activated receptor (PPAR), mitogen-activated protein kinases (MAPK) and Wnt signaling pathways. In addition, ssc-miR-133a-3p, ssc-miR-486 and ssc-miR-1 each had a great impact on the development of porcine subcutaneous fat through the PPAR signaling pathway. CONCLUSIONS We explored the role of differentially expressed miRNAs and studied the mechanisms of adipogenesis and fat deposition between two different pig breeds. In addition, these results also contribute to research relevant to human obesity.
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10
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Liu Y, Wei C, Ding Z, Xing E, Zhao Z, Shi F, Tian Y, Zhang Y, Fan W, Sun L. Role of serum C1q/TNF-related protein family levels in patients with acute coronary syndrome. Front Cardiovasc Med 2022; 9:967918. [PMID: 36061536 PMCID: PMC9437344 DOI: 10.3389/fcvm.2022.967918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/04/2022] [Indexed: 12/03/2022] Open
Abstract
Background The C1q/TNF-related protein (CTRP) family affects inflammation regulation, energy metabolism, and insulin signaling. However, their role in acute coronary syndrome (ACS) development is unclear. In this cross-sectional study, we aimed to investigate the association between CTRP family and ACS. Methods We enrolled 289 consecutive inpatients with suspected ACS. Serum CTRP family, tumor necrosis factor-α (TNF-α), and adiponectin (ADP) levels were assessed using enzyme-linked immunosorbent assay (ELISA). Multivariate logistic regression and subgroup analyses were used to assess risk factors for ACS. Spearman's tests were used to analyze correlations between CTRP family and continuous variables. Results Serum CTRP family levels differed significantly between ACS and Control groups (p < 0.05). After adjusting for confounding factors, CTRP family were independently associated with ACS (p < 0.05). The association between serum CTRP family levels and ACS was stable in various subgroups according to sex, age, diabetes mellitus, and dyslipidemia status (p for interaction > 0.05). Increasing tertiles of serum CTRP1 levels, significantly increased ACS risks, which decreased gradually with increasing CTRP2, CTRP12, and CTRP13 tertiles (p for trend < 0.05). Additionally, serum CTRP1, CTRP2, CTRP13, and CTRP15 levels were weakly correlated with the severity of coronary artery stenosis. Conclusion CTRP1 and CTRP5 were identified as independent ACS risk factors, whereas CTRP2, CTRP3, CTRP9, CTRP12, CTRP13, and CTRP15 were independent protective factors for ACS. CTRP family, especially CTRP1 and CTRP3 could be novel potential clinical biomarkers of ACS.
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Affiliation(s)
- Yixiang Liu
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Chen Wei
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Zhenjiang Ding
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Enhong Xing
- Central Laboratory, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Zhuoyan Zhao
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Fei Shi
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Yanan Tian
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Ying Zhang
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Wenjun Fan
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
| | - Lixian Sun
- Department of Cardiology, Chengde Medical University Affiliated Hospital, Chengde, China
- *Correspondence: Lixian Sun
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11
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Sarver DC, Xu C, Aja S, Wong GW. CTRP14 inactivation alters physical activity and food intake response to fasting and refeeding. Am J Physiol Endocrinol Metab 2022; 322:E480-E493. [PMID: 35403439 PMCID: PMC9126218 DOI: 10.1152/ajpendo.00002.2022] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Secreted proteins of the C1q/TNF-related protein (CTRP) family play diverse functions in different organ systems. In the brain, CTRP14/C1QL1 is required for the proper establishment and maintenance of synapses between climbing fibers and cerebellar Purkinje cells. Beyond the central nervous system, the function of CTRP14 is largely unknown. A recent genome-wide association study has implicated CTRP14/C1QL1 as a candidate gene associated with total body fat mass. Here, we explored the potential metabolic roles of CTRP14. We show that Ctrp14 expression in peripheral tissues is dynamically regulated by fasting-refeeding and high-fat feeding. In the chow-fed basal state, Ctrp14 deletion modestly reduces glucose tolerance in knockout (KO) male mice and affects physical activity in a sex- and nutritional state-dependent manner. In the ad libitum fed state, Ctrp14 KO male mice have lower physical activity. In contrast, female KO mice have increased physical activity in the fasted and refed states. In response to an obesogenic diet, CTRP14-deficient mice of either sex gained similar weight and are indistinguishable from wild-type littermates in body composition, lipid profiles, and insulin sensitivity. Ambulatory activity, however, is reduced in Ctrp14 KO male mice. Food intake is also reduced in Ctrp14 KO male mice in the refed period following food deprivation. Meal pattern analyses indicate that decreased caloric intake from fasting to refeeding is due, in part, to smaller meal size. We conclude that CTRP14 is largely dispensable for metabolic homeostasis, but highlight context-dependent and sexually dimorphic metabolic responses of Ctrp14 deletion affecting physical activity and ingestive behaviors.NEW & NOTEWORTHY CTRP14 is a secreted protein whose function in the peripheral tissues is largely unknown. We show that the expression of Ctrp14 in peripheral tissues is regulated by metabolic and nutritional state. We generated mice lacking CTRP14 and show that CTRP14 deficiency alters physical activity and food intake in response to fasting and refeeding. Our data has provided new and valuable information on the physiological function of CTRP14.
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Affiliation(s)
- Dylan C Sarver
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Cheng Xu
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Susan Aja
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - G William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
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12
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Ardizzone A, Lanza M, Casili G, Campolo M, Paterniti I, Cuzzocrea S, Esposito E. Efficacy of a Novel Therapeutic, Based on Natural Ingredients and Probiotics, in a Murine Model of Multiple Food Intolerance and Maldigestion. Nutrients 2022; 14:nu14112251. [PMID: 35684051 PMCID: PMC9182885 DOI: 10.3390/nu14112251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/24/2022] [Accepted: 05/26/2022] [Indexed: 02/07/2023] Open
Abstract
Patients with hypersensitive gut mucosa often suffer from food intolerances (FIs) associated with an inadequate gastrointestinal function that affects 15-20% of the population. Current treatments involve elimination diets, but require careful control, are difficult to maintain long-term, and diagnosis remains challenging. This study aims to evaluate the beneficial effects of a novel therapeutic of natural (NTN) origin containing food-grade polysaccharides, proteins, and grape seed extract to restore intestinal function in a murine model of fructose, carbohydrate, and fat intolerances. All experiments were conducted in four-week-old male CD1 mice. To induce FIs, mice were fed with either a high-carbohydrate diet (HCD), high-fat diet (HFD), or high-fructose diet (HFrD), respectively. After two weeks of treatment, several parameters and endpoints were evaluated such as food and water intake, body weight, histological score in several organs, gut permeability, intestinal epithelial integrity, and biochemical endpoints. Our results demonstrated that the therapeutic agent significantly restored gut barrier integrity and permeability compromised by every FIs induction. Restoration of intestinal function by NTN treatment has consequently improved tissue damage in several functional organs involved in the diagnostic of each intolerance such as the pancreas for HCD and liver for HFD and HFrD. Taken together, our results support NTN as a promising natural option in the non-pharmacological strategy for the recovery of intestinal dysregulation, supporting the well-being of the gastrointestinal tract.
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13
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Jerobin J, Ramanjaneya M, Bettahi I, Parammal R, Siveen KS, Alkasem M, Aye M, Sathyapalan T, Skarulis M, Atkin SL, Abou-Samra AB. Regulation of circulating CTRP-2/CTRP-9 and GDF-8/GDF-15 by intralipids and insulin in healthy control and polycystic ovary syndrome women following chronic exercise training. Lipids Health Dis 2021; 20:34. [PMID: 33874963 PMCID: PMC8054421 DOI: 10.1186/s12944-021-01463-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 04/06/2021] [Indexed: 11/10/2022] Open
Abstract
Background Polycystic ovary syndrome (PCOS) is associated with obesity, diabetes, and insulin resistance. The circulating C1Q/TNF-related proteins (CTRP-2, CTRP-9) and growth differentiation factors (GDF-8, GDF-15) contribute to glucose and lipid homeostasis. The effects of intralipids and insulin infusion on CTRP-2, CTRP-9, GDF-8 and GDF-15 in PCOS and control subjects before and after chronic exercise training were examined. Methods Ten PCOS and nine healthy subjects were studied at baseline status and after moderate-intensity chronic exercise training (1 h exercise, 3 times per week, 8 weeks). All participants were infused with 1.5 mL/min of saline or intralipids (20%) for 5 h, and during the last 2 h of saline or intralipids infusion hyperinsulinemic-euglycemic clamp (HIEC) was performed. CTRP-2, CTRP-9, GDF-8 and GDF-15 levels were measured at 0, 3 and 5 h. Results Intralipids dramatically increased CTRP-2 levels in PCOS (P = 0.02) and control (P = 0.004) subjects, which was not affected by insulin infusion or by exercise. Intralipids alone had no effects on CTRP-9, GDF-8, or GDF-15. Insulin increased the levels of GDF-15 in control subjects (P = 0.05) during the saline study and in PCOS subjects (P = 0.04) during the intralipid infusion. Insulin suppressed CTRP9 levels during the intralipid study in both PCOS (P = 0.04) and control (P = 0.01) subjects. Exercise significantly reduced fasting GDF-8 levels in PCOS (P = 0.03) and control (P = 0.04) subjects; however, intralipids infusion after chronic exercise training increased GDF-8 levels in both PCOS (P = 0.003) and control (P = 0.05) subjects and insulin infusion during intralipid infusion reduced the rise of GDF-8 levels. Conclusion This study showed that exogenous lipids modulate CTRP-2, which might have a physiological role in lipid metabolism. Since chronic exercise training reduced fasting GDF-8 levels; GDF-8 might have a role in humoral adaptation to exercise. GDF-15 and CTRP-9 levels are responsive to insulin, and thus they may play a role in insulin responses.
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Affiliation(s)
- Jayakumar Jerobin
- Qatar Metabolic Institute, Department of Medicine and Academic Health System, Hamad Medical Corporation, Doha, Qatar.
| | - Manjunath Ramanjaneya
- Qatar Metabolic Institute, Department of Medicine and Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | - Ilham Bettahi
- Qatar Metabolic Institute, Department of Medicine and Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | - Raihanath Parammal
- Qatar Metabolic Institute, Department of Medicine and Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | | | - Meis Alkasem
- Qatar Metabolic Institute, Department of Medicine and Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | - Myint Aye
- Department of Academic Endocrinology, Diabetes and Metabolism, Hull York Medical School, Hull, UK
| | - Thozhukat Sathyapalan
- Department of Academic Endocrinology, Diabetes and Metabolism, Hull York Medical School, Hull, UK
| | - Monica Skarulis
- Qatar Metabolic Institute, Department of Medicine and Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | | | - Abdul Badi Abou-Samra
- Qatar Metabolic Institute, Department of Medicine and Academic Health System, Hamad Medical Corporation, Doha, Qatar
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14
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Li L, Aslam M, Siegler BH, Niemann B, Rohrbach S. Comparative Analysis of CTRP-Mediated Effects on Cardiomyocyte Glucose Metabolism: Cross Talk between AMPK and Akt Signaling Pathway. Cells 2021; 10:cells10040905. [PMID: 33919975 PMCID: PMC8070942 DOI: 10.3390/cells10040905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/07/2021] [Accepted: 04/12/2021] [Indexed: 12/25/2022] Open
Abstract
C1q/tumor necrosis factor -alpha-related proteins (CTRPs) have been shown to mediate protective cardiovascular effects, but no data exists on their effects on glucose and fatty acid (FA) metabolism in cardiomyocytes. In the present study, adult rat cardiomyocytes and H9C2 cardiomyoblasts were stimulated with various recombinant CTRPs. Glucose or FA uptake, expression of genes involved in glucose or FA metabolism and the role of the AMP-activated protein kinase (AMPK) and Akt were investigated. Although most CTRPs induced an increase in phosphorylation of AMPK and Akt in cardiomyocytes, mainly CTRP2, 7, 9 and 13 induced GLUT1 and GLUT4 translocation and glucose uptake in cardiomyocytes, despite high structural similarities among CTRPs. AMPK inhibition reduced the CTRPs-mediated activation of Akt, while Akt inhibition did not impair AMPK activation. In addition, CTRP2, 7, 9 and 13 mediated strong effects on the expression of enzymes involved in glucose or FA metabolism. Loss of adiponectin receptor 1, which has been suggested to be involved in CTRP-induced signal transduction, abolished the effects of some but not all CTRPs on glucose metabolism. Targeting the AMPK signaling pathway via CTRPs may offer a therapeutic principle to restore glucose homeostasis by acting on glucose uptake independent of the Akt pathway.
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Affiliation(s)
- Ling Li
- Institute of Physiology, Justus Liebig University Giessen, 35392 Giessen, Germany; (B.H.S.); (S.R.)
- Correspondence: ; Tel.: +49-641-99-47342
| | - Muhammad Aslam
- Experimental Cardiology, Department of Cardiology and Angiology, Justus Liebig University Giessen, 35392 Giessen, Germany;
| | - Benedikt H. Siegler
- Institute of Physiology, Justus Liebig University Giessen, 35392 Giessen, Germany; (B.H.S.); (S.R.)
| | - Bernd Niemann
- Department of Cardiac and Vascular Surgery, Justus Liebig University Giessen, 35392 Giessen, Germany;
| | - Susanne Rohrbach
- Institute of Physiology, Justus Liebig University Giessen, 35392 Giessen, Germany; (B.H.S.); (S.R.)
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15
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Recinella L, Orlando G, Ferrante C, Chiavaroli A, Brunetti L, Leone S. Adipokines: New Potential Therapeutic Target for Obesity and Metabolic, Rheumatic, and Cardiovascular Diseases. Front Physiol 2020; 11:578966. [PMID: 33192583 PMCID: PMC7662468 DOI: 10.3389/fphys.2020.578966] [Citation(s) in RCA: 117] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 10/14/2020] [Indexed: 12/11/2022] Open
Abstract
Besides its role as an energy storage organ, adipose tissue can be viewed as a dynamic and complex endocrine organ, which produces and secretes several adipokines, including hormones, cytokines, extracellular matrix (ECM) proteins, and growth and vasoactive factors. A wide body of evidence showed that adipokines play a critical role in various biological and physiological functions, among which feeding modulation, inflammatory and immune function, glucose and lipid metabolism, and blood pressure control. The aim of this review is to summarize the effects of several adipokines, including leptin, diponectin, resistin, chemerin, lipocalin-2 (LCN2), vaspin, omentin, follistatin-like 1 (FSTL1), secreted protein acidic and rich in cysteine (SPARC), secreted frizzled-related protein 5 (SFRP5), C1q/TNF-related proteins (CTRPs), family with sequence similarity to 19 member A5 (FAM19A5), wingless-type inducible signaling pathway protein-1 (WISP1), progranulin (PGRN), nesfatin-1 (nesfatin), visfatin/PBEF/NAMPT, apelin, retinol binding protein 4 (RPB4), and plasminogen activator inhibitor-1 (PAI-1) in the regulation of insulin resistance and vascular function, as well as many aspects of inflammation and immunity and their potential role in managing obesity-associated diseases, including metabolic, osteoarticular, and cardiovascular diseases.
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Affiliation(s)
| | | | | | | | - Luigi Brunetti
- Department of Pharmacy, Gabriele d’Annunzio University, Chieti, Italy
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16
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Shanaki M, Shabani P, Goudarzi A, Omidifar A, Bashash D, Emamgholipour S. The C1q/TNF-related proteins (CTRPs) in pathogenesis of obesity-related metabolic disorders: Focus on type 2 diabetes and cardiovascular diseases. Life Sci 2020; 256:117913. [DOI: 10.1016/j.lfs.2020.117913] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 05/28/2020] [Accepted: 06/01/2020] [Indexed: 02/07/2023]
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17
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Tan SY, Little HC, Sarver DC, Watkins PA, Wong GW. CTRP12 inhibits triglyceride synthesis and export in hepatocytes by suppressing HNF-4α and DGAT2 expression. FEBS Lett 2020; 594:3227-3239. [PMID: 32749667 DOI: 10.1002/1873-3468.13895] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/21/2020] [Accepted: 07/25/2020] [Indexed: 12/15/2022]
Abstract
C1q/TNF-related protein 12 (CTRP12) is an antidiabetic adipokine whose circulating levels are reduced in obesity and diabetes. Although partial and complete loss-of-function mouse models suggest a role for CTRP12 in modulating lipid metabolism and adiposity, its effect on cellular lipid metabolism remains poorly defined. Here, we demonstrate a direct action of CTRP12 in regulating lipid synthesis and secretion. In hepatoma cells and primary mouse hepatocytes, CTRP12 treatment inhibits triglyceride synthesis by suppressing glycerophosphate acyltransferase (GPAT) and diacylglycerol acyltransferase (DGAT) expression. CTRP12 treatment also downregulates the expression of hepatocyte nuclear factor-4α (HNF-4α) and its target gene microsomal triglyceride transfer protein (MTTP), leading to reduced very-low-density lipoprotein (VLDL)-triglyceride export from hepatocytes. Consistent with the in vitro findings, overexpressing CTRP12 lowers fasting and postprandial serum triglyceride levels in mice. These results underscore the important function of CTRP12 in lipid metabolism in hepatocytes.
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Affiliation(s)
- Stefanie Y Tan
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Pfizer, 1 Portland St., Cambridge, MA, 02139, USA
| | - Hannah C Little
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Dylan C Sarver
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Paul A Watkins
- Department of Neurology and Biological Chemistry, Johns Hopkins University School of Medicine, and Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, USA
| | - G William Wong
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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18
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Tan SY, Lei X, Little HC, Rodriguez S, Sarver DC, Cao X, Wong GW. CTRP12 ablation differentially affects energy expenditure, body weight, and insulin sensitivity in male and female mice. Am J Physiol Endocrinol Metab 2020; 319:E146-E162. [PMID: 32421370 PMCID: PMC7468785 DOI: 10.1152/ajpendo.00533.2019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Secreted hormones facilitate tissue cross talk to maintain energy balance. We previously described C1q/TNF-related protein 12 (CTRP12) as a novel metabolic hormone. Gain-of-function and partial-deficiency mouse models have highlighted important roles for this fat-derived adipokine in modulating systemic metabolism. Whether CTRP12 is essential and required for metabolic homeostasis is unknown. We show here that homozygous deletion of Ctrp12 gene results in sexually dimorphic phenotypes. Under basal conditions, complete loss of CTRP12 had little impact on male mice, whereas it decreased body weight (driven by reduced lean mass and liver weight) and improved insulin sensitivity in female mice. When challenged with a high-fat diet, Ctrp12 knockout (KO) male mice had decreased energy expenditure, increased weight gain and adiposity, elevated serum TNFα level, and reduced insulin sensitivity. In contrast, female KO mice had reduced weight gain and liver weight. The expression of lipid synthesis and catabolism genes, as well as profibrotic, endoplasmic reticulum stress, and oxidative stress genes were largely unaffected in the adipose tissue of Ctrp12 KO male mice. Despite greater adiposity and insulin resistance, Ctrp12 KO male mice fed an obesogenic diet had lower circulating triglyceride and free fatty acid levels. In contrast, lipid profiles of the leaner female KO mice were not different from those of WT controls. These data suggest that CTRP12 contributes to whole body energy metabolism in genotype-, diet-, and sex-dependent manners, underscoring complex gene-environment interactions influencing metabolic outcomes.
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Affiliation(s)
- Stefanie Y Tan
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Xia Lei
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hannah C Little
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Susana Rodriguez
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Dylan C Sarver
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Xi Cao
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Endocrinology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - G William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
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19
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Zhang Q, Niu X, Tian L, Liu J, Niu R, Quan J, Yu J, Lin W, Qian Z, Zeng P. CTRP13 attenuates the expression of LN and CAV-1 Induced by high glucose via CaMKKβ/AMPK pathway in rLSECs. Aging (Albany NY) 2020; 12:11485-11499. [PMID: 32554851 PMCID: PMC7343496 DOI: 10.18632/aging.103234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 03/30/2020] [Indexed: 12/16/2022]
Abstract
Objective: To investigate the effect and mechanism of CTRP13 on hepatic sinusoidal capillarization induced by high glucose in rat liver sinusoidal endothelial cells (rLSECs). Results: CTRP13 was reduced in high glucose-treated rLSECs. High glucose increased LN and CAV-1 expression and inhibited CaMKKβ and AMPK phosphorylation. CTRP13 overexpression protected rLSECs against high glucose-induced increase of LN and CAV-1 expression. Moreover, CTRP13 overexpression increased high glucose-induced inhibition of CaMKKβ and AMPK activation in CTRP13-overexpressing rLSECs. Inhibition of CaMKKβ and AMPK disturbed the protective effects of CTRP13 in high glucose-induced increase of LN and CAV-1. Hepatic steatosis was enhanced and basement membrane was thickened in liver of diabetic fatty liver rats. Conclusions: Our data identified the protective role of CTRP13 in hepatic sinusoidal capillarization induced by high glucose via activating CAMKKβ/AMPK pathway. CTRP13 may be a potential target for screening and treating diabetic fatty liver. Methods: Construct lentiviral CTRP13 overexpression vector and transfect rLSECs. Use STO-609 (a CaMKKβ inhibitor) or Compound C (an AMPK inhibitor) to treat rLSECs. CTRP13, CaMKKβ, AMPK, laminin (LN) and caveolin-1 (CAV-1) were detected by qRT-PCR and Western blotting. Establish rat model of diabetic fatty liver. Use immunohistochemistry, hematoxylin-eosin and silver staining to observe the histopathological features of liver.
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Affiliation(s)
- Qi Zhang
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China.,School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Xiang'e Niu
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China.,School of Clinical Medicine, Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
| | - Limin Tian
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China
| | - Jing Liu
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China
| | - Ruilan Niu
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China
| | - Jinxing Quan
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China
| | - Jing Yu
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China
| | - Wenyan Lin
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China
| | - Zibing Qian
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China.,School of Clinical Medicine, Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
| | - Peiyun Zeng
- Department of Endocrinology, Gansu Provincial Hospital, Lanzhou 730000, Gansu Province, China.,Clinical Research Center for Metabolic Disease, Lanzhou 730000, Gansu Province, China.,School of Clinical Medicine, Gansu University of Chinese Medicine, Lanzhou 730000, Gansu Province, China
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Serum C1q/TNF-Related Protein-2 (CTRP2) Levels are Associated with Coronary Artery Disease. Arch Med Res 2020; 51:167-172. [DOI: 10.1016/j.arcmed.2020.01.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/03/2020] [Accepted: 01/21/2020] [Indexed: 12/31/2022]
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Rodriguez S, Little HC, Daneshpajouhnejad P, Shepard BD, Tan SY, Wolfe A, Cheema MU, Jandu S, Woodward OM, Talbot CC, Berkowitz DE, Rosenberg AZ, Pluznick JL, Wong GW. Late-onset renal hypertrophy and dysfunction in mice lacking CTRP1. FASEB J 2020; 34:2657-2676. [PMID: 31908037 PMCID: PMC7739198 DOI: 10.1096/fj.201900558rr] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 12/04/2019] [Accepted: 12/05/2019] [Indexed: 12/19/2022]
Abstract
Local and systemic factors that influence renal structure and function in aging are not well understood. The secretory protein C1q/TNF-related protein 1 (CTRP1) regulates systemic metabolism and cardiovascular function. We provide evidence here that CTRP1 also modulates renal physiology in an age- and sex-dependent manner. In mice lacking CTRP1, we observed significantly increased kidney weight and glomerular hypertrophy in aged male but not female or young mice. Although glomerular filtration rate, plasma renin and aldosterone levels, and renal response to water restriction did not differ between genotypes, CTRP1-deficient male mice had elevated blood pressure. Echocardiogram and pulse wave velocity measurements indicated normal heart function and vascular stiffness in CTRP1-deficient animals, and increased blood pressure was not due to greater salt retention. Paradoxically, CTRP1-deficient mice had elevated urinary sodium and potassium excretion, partially resulting from reduced expression of genes involved in renal sodium and potassium reabsorption. Despite renal hypertrophy, markers of inflammation, fibrosis, and oxidative stress were reduced in CTRP1-deficient mice. RNA sequencing revealed alterations and enrichments of genes in metabolic processes in CTRP1-deficient animals. These results highlight novel contributions of CTRP1 to aging-associated changes in renal physiology.
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Affiliation(s)
- Susana Rodriguez
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hannah C. Little
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | | | - Blythe D. Shepard
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Stefanie Y. Tan
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Andrew Wolfe
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Muhammad Umar Cheema
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Sandeep Jandu
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Owen M. Woodward
- Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland
| | - C. Conover Talbot
- Institute for Basic Biomedical Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Dan E. Berkowitz
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Avi Z. Rosenberg
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Kidney Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
| | - Jennifer L. Pluznick
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - G. William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Saleh J, Al-Maqbali M, Abdel-Hadi D. Role of Complement and Complement-Related Adipokines in Regulation of Energy Metabolism and Fat Storage. Compr Physiol 2019; 9:1411-1429. [PMID: 31688967 DOI: 10.1002/cphy.c170037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Adipose tissue releases many cytokines and inflammatory factors described as adipokines. In obesity, adipokines released from expanding adipose tissue are implicated in disease progression and metabolic dysfunction. However, mechanisms controlling the progression of adiposity and metabolic complications are not fully understood. It has been suggested that expanding fat mass and sustained release of inflammatory adipokines in adipose tissue lead to hypoxia, oxidative stress, apoptosis, and cellular damage. These changes trigger an immune response involving infiltration of adipose tissue with immune cells, complement activation and generation of factors involved in opsonization and clearance of damaged cells. Abundant evidence now indicates that adipose tissue is an active secretory source of complement and complement-related adipokines that, in addition to their inflammatory role, contribute to the regulation of metabolic function. This article highlights advances in knowledge regarding the role of these adipokines in energy regulation of adipose tissue through modulating lipogenic and lipolytic pathways. Several adipokines will be discussed including adipsin, Factor H, properdin, C3a, Acylation-Stimulating Protein, C1q/TNF-related proteins, and response gene to complement-32 (RGC-32). Interactions between these factors will be described considering their immune-metabolic roles in the adipose tissue microenvironment and their potential contribution to progression of adiposity and metabolic dysfunction. The differential expression and the role of complement factors in gender-related fat partitioning will also be addressed. Identifying lipogenic adipokines and their specific autocrine/paracrine roles may provide means for adipose-tissue-targeted therapeutic interventions that may disrupt the vicious circle of adiposity and disease progression. © 2019 American Physiological Society. Compr Physiol 9:1411-1429, 2019.
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Affiliation(s)
- Jumana Saleh
- Biochemistry Department, College of Medicine & Health Sciences, Sultan Qaboos University, Muscat, Oman
| | - Muna Al-Maqbali
- Biochemistry Department, College of Medicine, Sultan Qaboos University, Muscat, Oman
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Lei X, Wong GW. C1q/TNF-related protein 2 (CTRP2) deletion promotes adipose tissue lipolysis and hepatic triglyceride secretion. J Biol Chem 2019; 294:15638-15649. [PMID: 31439668 DOI: 10.1074/jbc.ra119.009230] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/16/2019] [Indexed: 11/06/2022] Open
Abstract
The highly conserved C1q/TNF-related protein (CTRP) family of secreted hormones has emerged as important regulators of insulin action and of sugar and fat metabolisms. Among these, the specific biological function of CTRP2 remains elusive. Here, we show that the expression of human CTRP2 is positively correlated with body mass index (BMI) and is up-regulated in obesity. We used a knockout (KO) mouse model to determine CTRP2 function and found that Ctrp2-KO mice have significantly elevated metabolic rates and energy expenditure leading to lower body weights and lower adiposity. CTRP2 deficiency up-regulated the expression of lipolytic enzymes and protein kinase A signaling, resulting in enhanced adipose tissue lipolysis. In cultured adipocytes, CTRP2 treatment suppressed triglyceride (TG) hydrolysis, and its deficiency enhanced agonist-induced lipolysis in vivo CTRP2-deficient mice also had altered hepatic and plasma lipid profiles. Liver size and hepatic TG content were significantly reduced, but plasma TG was elevated in KO mice. Both plasma and hepatic cholesterol levels, however, were reduced in KO mice. Loss of CTRP2 also enhanced hepatic TG secretion and contributed to impaired plasma lipid clearance following an oral lipid gavage. Liver metabolomic analysis revealed significant changes in diacylglycerols and phospholipids, suggesting that increased membrane remodeling may underlie the altered hepatic TG secretion we observed. Our results provide the first in vivo evidence that CTRP2 regulates lipid metabolism in adipose tissue and liver.
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Affiliation(s)
- Xia Lei
- Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205
| | - G William Wong
- Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205
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Abstract
The organs require oxygen and other types of nutrients (amino acids, sugars, and lipids) to function, the heart consuming large amounts of fatty acids for oxidation and adenosine triphosphate (ATP) generation.
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Stewart AN, Tan SY, Clark DJ, Zhang H, Wong GW. N-Linked Glycosylation-Dependent and -Independent Mechanisms Regulating CTRP12 Cleavage, Secretion, and Stability. Biochemistry 2019; 58:727-741. [PMID: 30566828 DOI: 10.1021/acs.biochem.8b00528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
C1q/TNF-related protein 12 (CTRP12) is a secreted regulator of glucose and lipid metabolism. It circulates in plasma as a full-length protein or as a cleaved isoform generated by furin/PCSK3 cleavage. These isoforms preferentially activate different signaling pathways, and their ratio in plasma is altered in obesity and diabetes. Here, we show that three conserved asparagine residues (Asn-39, Asn-287, and Asn-297) play important roles in modulating CTRP12 cleavage, secretion, and stability. Mass spectrometry analysis provided direct evidence of Asn-39 glycosylation. When N-linked glycosylation was inhibited by tunicamycin or abolished by the N39Q, N39A, or T41A mutation, CTRP12 cleavage was enhanced. Complex-type N-glycans on CTRP12 blocked cleavage by the Golgi-localized furin. In N-acetylglucosaminyltransferase I (GnTI)-deficient cells that could not form hybrid and complex-type N-glycans in the Golgi, CTRP12 cleavage was enhanced, and re-expressing GnTI reduced cleavage. Replacing the nonglycosylated Asn-297 with glutamine or alanine also increased CTRP12 cleavage. Both Asn-39 and Asn-297 contributed independently to CTRP12 cleavage: maximum cleavage was observed in the double mutant. In addition, CTRP12 cleavage was abolished in furin-deficient cells and restored by furin re-expression. Replacing the nonglycosylated Asn-287 with glutamine or alanine resulted in protein misfolding and aggregation, leading to retention in the endoplasmic reticulum. Cycloheximide chase analyses indicated reduced protein stability for N39Q, T41A, and N297Q mutants. Lastly, we show that increasing the flux through the hexosamine biosynthesis pathway by exogenous glucosamine, known to disrupt protein glycosylation, also promoted CTRP12 cleavage. Combined, these data highlight glycosylation-dependent and -independent mechanisms regulating CTRP12 cleavage, secretion, and protein stability.
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Affiliation(s)
- Ashley N Stewart
- Department of Physiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Stefanie Y Tan
- Department of Physiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - David J Clark
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - Hui Zhang
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
| | - G William Wong
- Department of Physiology, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
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DeGroat AR, Fleming CK, Dunlay SM, Hagood KL, Moorman JP, Peterson JM. The sex specific effect of alcohol consumption on circulating levels of CTRP3. PLoS One 2018; 13:e0207011. [PMID: 30403751 PMCID: PMC6221322 DOI: 10.1371/journal.pone.0207011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 10/23/2018] [Indexed: 02/06/2023] Open
Abstract
The goal of this project was to establish the effect of alcohol consumption on the circulating levels of the adipose tissue derived protein C1q TNF Related Protein 3 (CTRP3). Adipose tissue secretes several adipokines, such as adiponectin and leptin, which exert a multitude of biological effects important for human health. However, adipose tissue is extremely sensitive to alcohol consumption, leading not only to disrupted fat storage, but also to disruptions in adipokine production. Changes to adipokine secretion could have widespread biological effects and potentially contribute to alcohol-induced ailments, such as alcoholic fatty liver disease (ALD). CTRP3 has been previously demonstrated to attenuate fatty liver disease, and suppression of CTRP3 with alcohol consumption could contribute to development of and progression to alcoholic fatty liver disease. To examine the effect of ethanol consumption on circulating adipokine levels, male and female mice were fed an ethanol containing diet (Lieber-DeCarli 5% (v/v) ethanol diet) for 10-days followed by a single gavage of 5 g/kg ethanol (the NIAAA model), or for 6-weeks with no binge added (chronic model). In female mice, adiponectin levels increased ~2-fold in both models of ethanol feeding, but in male mice increased adiponectin levels were only observed after chronic ethanol feeding. On the other hand, in female mice, circulating CTRP3 levels decreased by ~75% and ~50% in the NIAAA and chronic model, respectively, with no changes observed in the male mice in either feeding model. Leptin levels were unchanged with ethanol feeding regardless of model or sex of mice. Lastly, chronic ethanol feeding led to a significant increase in mortality (~50%) in female mice, with no difference in relative ethanol consumption. These findings indicate that ethanol consumption can dysregulate adipokine secretion, but that the effects vary by sex of animal, method of ethanol consumption, and adipokine examined. These findings also indicate that female mice are more sensitive to the chronic effects of ethanol than male mice. Notably, this is the first study to document the effects of ethanol consumption on the circulating levels of CTRP3. Understanding the impact of excessive alcohol consumption on adipokine production and secretion could identify novel mechanisms of alcohol-induced human disease. However, the mechanism responsible for the increased sensitivity remains elusive.
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Affiliation(s)
- Ashley R. DeGroat
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Christina K. Fleming
- Department of Health Sciences, College of Public Health, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Samantha M. Dunlay
- Department of Health Sciences, College of Public Health, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Kendra L. Hagood
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Jonathan P. Moorman
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, United States of America
- Department of Internal Medicine, Division of Infectious, Inflammatory and Immunologic Diseases, Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, United States of America
- Department of Veterans Affairs, Hepatitis (HCV/HIV) Program, James H Quillen VA Medical Center, Johnson City, Tennessee, United States of America
| | - Jonathan M. Peterson
- Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, United States of America
- Department of Health Sciences, College of Public Health, East Tennessee State University, Johnson City, Tennessee, United States of America
- Center of Excellence in Inflammation, Infectious Disease and Immunity, James H Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee, United States of America
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Lei X, Seldin MM, Little HC, Choy N, Klonisch T, Wong GW. C1q/TNF-related protein 6 (CTRP6) links obesity to adipose tissue inflammation and insulin resistance. J Biol Chem 2017; 292:14836-14850. [PMID: 28726640 DOI: 10.1074/jbc.m116.766808] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 06/30/2017] [Indexed: 11/06/2022] Open
Abstract
Obesity is associated with chronic low-grade inflammation, and metabolic regulators linking obesity to inflammation have therefore received much attention. Secreted C1q/TNF-related proteins (CTRPs) are one such group of regulators that regulate glucose and fat metabolism in peripheral tissues and modulate inflammation in adipose tissue. We have previously shown that expression of CTRP6 is up-regulated in leptin-deficient mice and, conversely, down-regulated by the anti-diabetic drug rosiglitazone. Here, we provide evidence for a novel role of CTRP6 in modulating both inflammation and insulin sensitivity. We found that in obese and diabetic humans and mouse models, CTRP6 expression was markedly up-regulated in adipose tissue and that stromal vascular cells, such as macrophages, are a major CTRP6 source. Overexpressing mouse or human CTRP6 impaired glucose disposal in peripheral tissues in response to glucose and insulin challenge in wild-type mice. Conversely, Ctrp6 gene deletion improved insulin action and increased metabolic rate and energy expenditure in diet-induced obese mice. Mechanistically, CTRP6 regulates local inflammation and glucose metabolism by targeting macrophages and adipocytes, respectively. In cultured macrophages, recombinant CTRP6 dose-dependently up-regulated the expression and production of TNF-α. Conversely, CTRP6 deficiency reduced circulating inflammatory cytokines and pro-inflammatory macrophages in adipose tissue. CTRP6-overexpressing mice or CTRP6-treated adipocytes had reduced insulin-stimulated Akt phosphorylation and glucose uptake. In contrast, loss of CTRP6 enhanced insulin-stimulated Akt activation in adipose tissue. Together, these results establish CTRP6 as a novel metabolic/immune regulator linking obesity to adipose tissue inflammation and insulin resistance.
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Affiliation(s)
- Xia Lei
- From the Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205 and
| | - Marcus M Seldin
- From the Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205 and
| | - Hannah C Little
- From the Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205 and
| | - Nicholas Choy
- From the Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205 and
| | - Thomas Klonisch
- the Department of Human Anatomy and Cell Science, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - G William Wong
- From the Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205 and
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Petersen PS, Lei X, Wolf RM, Rodriguez S, Tan SY, Little HC, Schweitzer MA, Magnuson TH, Steele KE, Wong GW. CTRP7 deletion attenuates obesity-linked glucose intolerance, adipose tissue inflammation, and hepatic stress. Am J Physiol Endocrinol Metab 2017; 312:E309-E325. [PMID: 28223291 PMCID: PMC5406989 DOI: 10.1152/ajpendo.00344.2016] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 01/10/2017] [Accepted: 02/06/2017] [Indexed: 12/22/2022]
Abstract
Chronic low-grade inflammation and cellular stress are important contributors to obesity-linked metabolic dysfunction. Here, we uncover an immune-metabolic role for C1q/TNF-related protein 7 (CTRP7), a secretory protein of the C1q family with previously unknown function. In obese humans, circulating CTRP7 levels were markedly elevated and positively correlated with body mass index, glucose, insulin, insulin resistance index, hemoglobin A1c, and triglyceride levels. Expression of CTRP7 in liver was also significantly upregulated in obese humans and positively correlated with gluconeogenic genes. In mice, Ctrp7 expression was differentially modulated in various tissues by fasting and refeeding and by diet-induced obesity. A genetic loss-of-function mouse model was used to determine the requirement of CTRP7 for metabolic homeostasis. When fed a control low-fat diet, male or female mice lacking CTRP7 were indistinguishable from wild-type littermates. In obese male mice consuming a high-fat diet, however, CTRP7 deficiency attenuated insulin resistance and enhanced glucose tolerance, effects that were independent of body weight, metabolic rate, and physical activity level. Improved glucose metabolism in CTRP7-deficient mice was associated with reduced adipose tissue inflammation, as well as decreased liver fibrosis and cellular oxidative and endoplasmic reticulum stress. These results provide a link between elevated CTRP7 levels and impaired glucose metabolism, frequently associated with obesity. Inhibiting CTRP7 action may confer beneficial metabolic outcomes in the setting of obesity and diabetes.
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Affiliation(s)
- Pia S Petersen
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Xia Lei
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Risa M Wolf
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland; and
| | - Susana Rodriguez
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Stefanie Y Tan
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hannah C Little
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Michael A Schweitzer
- Department of Surgery, Johns Hopkins Center for Bariatric Surgery, Johns Hopkins Bayview Medical Center, Baltimore, Maryland
| | - Thomas H Magnuson
- Department of Surgery, Johns Hopkins Center for Bariatric Surgery, Johns Hopkins Bayview Medical Center, Baltimore, Maryland
| | - Kimberley E Steele
- Department of Surgery, Johns Hopkins Center for Bariatric Surgery, Johns Hopkins Bayview Medical Center, Baltimore, Maryland
| | - G William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland;
- Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Hicks DF, Goossens N, Blas-García A, Tsuchida T, Wooden B, Wallace MC, Nieto N, Lade A, Redhead B, Cederbaum AI, Dudley JT, Fuchs BC, Lee YA, Hoshida Y, Friedman SL. Transcriptome-based repurposing of apigenin as a potential anti-fibrotic agent targeting hepatic stellate cells. Sci Rep 2017; 7:42563. [PMID: 28256512 PMCID: PMC5335661 DOI: 10.1038/srep42563] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/10/2017] [Indexed: 02/07/2023] Open
Abstract
We have used a computational approach to identify anti-fibrotic therapies by querying a transcriptome. A transcriptome signature of activated hepatic stellate cells (HSCs), the primary collagen-secreting cell in liver, and queried against a transcriptomic database that quantifies changes in gene expression in response to 1,309 FDA-approved drugs and bioactives (CMap). The flavonoid apigenin was among 9 top-ranked compounds predicted to have anti-fibrotic activity; indeed, apigenin dose-dependently reduced collagen I in the human HSC line, TWNT-4. To identify proteins mediating apigenin's effect, we next overlapped a 122-gene signature unique to HSCs with a list of 160 genes encoding proteins that are known to interact with apigenin, which identified C1QTNF2, encoding for Complement C1q tumor necrosis factor-related protein 2, a secreted adipocytokine with metabolic effects in liver. To validate its disease relevance, C1QTNF2 expression is reduced during hepatic stellate cell activation in culture and in a mouse model of alcoholic liver injury in vivo, and its expression correlates with better clinical outcomes in patients with hepatitis C cirrhosis (n = 216), suggesting it may have a protective role in cirrhosis progression.These findings reinforce the value of computational approaches to drug discovery for hepatic fibrosis, and identify C1QTNF2 as a potential mediator of apigenin's anti-fibrotic activity.
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Affiliation(s)
- Daniel F. Hicks
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Nicolas Goossens
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
- Division of Gastroenterology and Hepatology, Geneva University Hospital, Geneva, Switzerland
| | - Ana Blas-García
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
- Department of Pharmacology, University of Valencia-FISABIO, Valencia, Spain
| | - Takuma Tsuchida
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
- Research Division, Mitsubishi Tanabe Pharma Corporation, Saitama, Japan
| | - Benjamin Wooden
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Michael C. Wallace
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
- University of Western Australia, West Leederville, WA, Australia
| | - Natalia Nieto
- Department of Pathology, University of Illinois at Chicago, Chicago, USA
| | - Abigale Lade
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Benjamin Redhead
- Department of Genetics and Genomics Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Arthur I Cederbaum
- Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Joel T. Dudley
- Department of Genetics and Genomics Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Bryan C. Fuchs
- Division of Surgical Oncology, Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, USA
| | - Youngmin A. Lee
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Yujin Hoshida
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Scott L. Friedman
- Division of Liver Diseases, Department of Medicine, Liver Cancer Program, Tisch Cancer Institute, Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, USA
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Tan SY, Little HC, Lei X, Li S, Rodriguez S, Wong GW. Partial deficiency of CTRP12 alters hepatic lipid metabolism. Physiol Genomics 2016; 48:936-949. [PMID: 27815536 DOI: 10.1152/physiolgenomics.00111.2016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 10/07/2016] [Indexed: 12/16/2022] Open
Abstract
Secreted hormones play pivotal roles in tissue cross talk to maintain physiologic blood glucose and lipid levels. We previously showed that C1q/TNF-related protein 12 (CTRP12) is a novel secreted protein involved in regulating glucose metabolism whose circulating levels are reduced in obese and insulin-resistant mouse models. Its role in lipid metabolism, however, is unknown. Using a novel heterozygous mouse model, we show that the loss of a single copy of the Ctrp12 gene (also known as Fam132a and adipolin) affects whole body lipid metabolism. In Ctrp12 (+/-) male mice fed a control low-fat diet, hepatic fat oxidation was upregulated while hepatic VLDL-triglyceride secretion was reduced relative to wild-type (WT) littermates. When challenged with a high-fat diet, Ctrp12 (+/-) male mice had impaired lipid clearance in response to acute lipid gavage, reduced hepatic triglyceride secretion, and greater steatosis with higher liver triglyceride and cholesterol levels. Unlike male mice, Ctrp12 (+/-) female mice fed a control low-fat diet were indistinguishable from WT littermates. When obesity was induced by high-fat feeding, Ctrp12 (+/-) female mice developed mild insulin resistance with impaired insulin tolerance. In contrast to male mice, hepatic triglyceride secretion was increased in Ctrp12 (+/-) female mice fed a high-fat diet. Thus, in different dietary and metabolic contexts, loss of a single Ctrp12 allele affects glucose and lipid metabolism in a sex-dependent manner, highlighting the importance of genetic and environmental determinants of metabolic phenotypes.
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Affiliation(s)
- Stefanie Y Tan
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hannah C Little
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Xia Lei
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Shuoyang Li
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Susana Rodriguez
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - G William Wong
- Department of Physiology and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Li Y, Ozment T, Wright GL, Peterson JM. Identification of Putative Receptors for the Novel Adipokine CTRP3 Using Ligand-Receptor Capture Technology. PLoS One 2016; 11:e0164593. [PMID: 27727322 PMCID: PMC5058508 DOI: 10.1371/journal.pone.0164593] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 09/27/2016] [Indexed: 02/06/2023] Open
Abstract
C1q TNF Related Protein 3 (CTRP3) is a member of a family of secreted proteins that exert a multitude of biological effects. Our initial work identified CTRP3’s promise as an effective treatment for Nonalcoholic fatty liver disease (NAFLD). Specifically, we demonstrated that mice fed a high fat diet failed to develop NAFLD when treated with CTRP3. The purpose of this current project is to identify putative receptors which mediate the hepatic actions of CTRP3.
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Affiliation(s)
- Ying Li
- Quillen College of Medicine, Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Tammy Ozment
- Quillen College of Medicine, Department of Internal Medicine, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Gary L. Wright
- Quillen College of Medicine, Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, United States of America
| | - Jonathan M. Peterson
- Quillen College of Medicine, Department of Biomedical Sciences, East Tennessee State University, Johnson City, Tennessee, United States of America
- College of Public Health, Department of Health Sciences, East Tennessee State University, Johnson City, Tennessee, United States of America
- * E-mail:
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Rodriguez S, Lei X, Petersen PS, Tan SY, Little HC, Wong GW. Loss of CTRP1 disrupts glucose and lipid homeostasis. Am J Physiol Endocrinol Metab 2016; 311:E678-E697. [PMID: 27555298 PMCID: PMC5241556 DOI: 10.1152/ajpendo.00087.2016] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 08/18/2016] [Indexed: 12/22/2022]
Abstract
C1q/TNF-related protein 1 (CTRP1) is a conserved plasma protein of the C1q family with notable metabolic and cardiovascular functions. We have previously shown that CTRP1 infusion lowers blood glucose and that transgenic mice with elevated circulating CTRP1 are protected from diet-induced obesity and insulin resistance. Here, we used a genetic loss-of-function mouse model to address the requirement of CTRP1 for metabolic homeostasis. Despite similar body weight, food intake, and energy expenditure, Ctrp1 knockout (KO) mice fed a low-fat diet developed insulin resistance and hepatic steatosis. Impaired glucose metabolism in Ctrp1 KO mice was associated with increased hepatic gluconeogenic gene expression and decreased skeletal muscle glucose transporter glucose transporter 4 levels and AMP-activated protein kinase activation. Loss of CTRP1 enhanced the clearance of orally administered lipids but did not affect intestinal lipid absorption, hepatic VLDL-triglyceride export, or lipoprotein lipase activity. In contrast to triglycerides, hepatic cholesterol levels were reduced in Ctrp1 KO mice, paralleling the reduced expression of cholesterol synthesis genes. Contrary to expectations, when challenged with a high-fat diet to induce obesity, Ctrp1 KO mice had increased physical activity and reduced body weight, adiposity, and expression of lipid synthesis and fibrotic genes in adipose tissue; these phenotypes were linked to elevated FGF-21 levels. Due in part to increased hepatic AMP-activated protein kinase activation and reduced expression of lipid synthesis genes, Ctrp1 KO mice fed a high-fat diet also had reduced liver and serum triglyceride and cholesterol levels. Taken together, these results provide genetic evidence to establish the significance of CTRP1 to systemic energy metabolism in different metabolic and dietary contexts.
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Affiliation(s)
- Susana Rodriguez
- Department of Physiology and Center for Metabolism and Obesity Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Xia Lei
- Department of Physiology and Center for Metabolism and Obesity Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Pia S Petersen
- Department of Physiology and Center for Metabolism and Obesity Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Stefanie Y Tan
- Department of Physiology and Center for Metabolism and Obesity Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hannah C Little
- Department of Physiology and Center for Metabolism and Obesity Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - G William Wong
- Department of Physiology and Center for Metabolism and Obesity Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland
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Yang Y, Li Y, Ma Z, Jiang S, Fan C, Hu W, Wang D, Di S, Sun Y, Yi W. A brief glimpse at CTRP3 and CTRP9 in lipid metabolism and cardiovascular protection. Prog Lipid Res 2016; 64:170-177. [DOI: 10.1016/j.plipres.2016.10.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 08/14/2016] [Accepted: 10/11/2016] [Indexed: 01/19/2023]
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Wolf RM, Steele KE, Peterson LA, Zeng X, Jaffe AE, Schweitzer MA, Magnuson TH, Wong GW. C1q/TNF-Related Protein-9 (CTRP9) Levels Are Associated With Obesity and Decrease Following Weight Loss Surgery. J Clin Endocrinol Metab 2016; 101:2211-7. [PMID: 26982010 PMCID: PMC4870852 DOI: 10.1210/jc.2016-1027] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
CONTEXT C1q/TNF-related protein-9 (CTRP9) is a novel adipokine that has beneficial metabolic and cardiovascular effects in various animal models. Alterations in circulating CTRP9 have also been observed in patients with cardiovascular disease and diabetes, but little is known about the impact of obesity and bariatric surgery on CTRP9 concentrations. OBJECTIVE The aim of this study was to compare CTRP9 levels in obese and lean subjects and to determine whether circulating CTRP9 levels in morbidly obese patients are altered by bariatric surgery. DESIGN, SETTING, AND PARTICIPANTS Fifty-nine obese bariatric surgical patients and 62 lean controls were recruited to participate in a cross-sectional study at an academic medical center. The obese patients were further invited to participate in a cohort study, and 21 returned for analysis at 3 and 6 months postsurgery. INTERVENTION Bariatric surgery (Roux-en-Y gastric bypass and vertical sleeve gastrectomy) was the intervention for this study. MAIN OUTCOME MEASURES Fasting serum was obtained from all subjects on entry to the study and was analyzed in the core laboratory for hemoglobin A1c, glucose, aspartate aminotransferase, alanine aminotransferase, total cholesterol, high- and low-density lipoprotein cholesterol, and triglycerides; CTRP9, insulin, adiponectin, and leptin were measured by ELISA. Serum from the patients in the cohort study was also analyzed at 3 and 6 months. RESULTS Serum CTRP9 was significantly higher in the obese group compared to the lean group. CTRP9 was associated with obesity, even after controlling for age, gender, and ethnicity. Following bariatric surgery, there was a significant decrease in weight at 3 and 6 months postprocedure, accompanied by decreases in CTRP9, hemoglobin A1c and leptin, and an increase in serum adiponectin. CONCLUSIONS CTRP9 levels are elevated in obesity and significantly decrease following weight loss surgery. Our data suggest that CTRP9 may play a compensatory role in obesity, similar to that of insulin, and is down-regulated following weight loss surgery.
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Affiliation(s)
- Risa M Wolf
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Kimberley E Steele
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Leigh A Peterson
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Xiange Zeng
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Andrew E Jaffe
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Michael A Schweitzer
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Thomas H Magnuson
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - G William Wong
- Departments of Pediatrics (R.M.W.), Surgery (K.E.S., L.A.P., M.A.S., T.H.M.), and Physiology (X.Z., G.W.W.), and Center for Metabolism and Obesity Research (R.M.W., G.W.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland; Lieber Institute for Brain Development (A.E.J.), Johns Hopkins Medical Campus, Baltimore, Maryland; and Departments of Mental Health (A.E.J.) and Biostatistics (A.E.J.), Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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Wolf RM, Lei X, Yang ZC, Nyandjo M, Tan SY, Wong GW. CTRP3 deficiency reduces liver size and alters IL-6 and TGFβ levels in obese mice. Am J Physiol Endocrinol Metab 2016; 310:E332-45. [PMID: 26670485 PMCID: PMC4773650 DOI: 10.1152/ajpendo.00248.2015] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 12/08/2015] [Indexed: 12/15/2022]
Abstract
C1q/TNF-related protein 3 (CTRP3) is a secreted metabolic regulator whose circulating levels are reduced in human and rodent models of obesity and diabetes. Previously, we showed that CTRP3 infusion lowers blood glucose by suppressing gluconeogenesis and that transgenic overexpression of CTRP3 protects mice against diet-induced hepatic steatosis. Here, we used a genetic loss-of-function mouse model to further address whether CTRP3 is indeed required for metabolic homeostasis under normal and obese states. Both male and female mice lacking CTRP3 had similar weight gain when fed a control low-fat (LFD) or high-fat diet (HFD). Regardless of diet, no differences were observed in adiposity, food intake, metabolic rate, energy expenditure, or physical activity levels between wild-type (WT) and Ctrp3-knockout (KO) animals of either sex. Contrary to expectations, loss of CTRP3 in LFD- or HFD-fed male and female mice also had minimal or no impact on whole body glucose metabolism, insulin sensitivity, and fasting-induced hepatic gluconeogenesis. Unexpectedly, the liver sizes of HFD-fed Ctrp3-KO male mice were markedly reduced despite a modest increase in triglyceride content. Furthermore, liver expression of fat oxidation genes was upregulated in the Ctrp3-KO mice. Whereas the liver and adipose expression of profibrotic TGFβ1, as well as its serum levels, was suppressed in HFD-fed KO mice, circulating proinflammatory IL-6 levels were markedly increased; these changes, however, were insufficient to affect systemic metabolic outcome. We conclude that, although it is dispensable for physiological control of energy balance, CTRP3 plays a previously unsuspected role in modulating liver size and circulating cytokine levels in response to obesity.
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Affiliation(s)
- Risa M Wolf
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Xia Lei
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Zhi-Chun Yang
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Pharmacology, School of Pharmaceutical Sciences, Central South University, Changsha, China; and Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Maeva Nyandjo
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Stefanie Y Tan
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - G William Wong
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, Maryland; Center for Metabolism and Obesity Research, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Wang W, Lau WB, Wang Y, Ma X, Li R. Reduction of CTRP9, a novel anti-platelet adipokine, contributes to abnormal platelet activity in diabetic animals. Cardiovasc Diabetol 2016; 15:6. [PMID: 26754066 PMCID: PMC4709932 DOI: 10.1186/s12933-015-0321-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/23/2015] [Indexed: 12/20/2022] Open
Abstract
Platelet hyper-reactivity is a crucial cause of accelerated atherosclerosis increasing risk of thrombotic vascular events in diabetic patients. The mechanisms leading to abnormal platelet activity during diabetes are complex and not fully defined. The current study attempted to clarify the role of CTRP9, a novel adiponectin paralog, in enhanced platelet activity and determined whether CTRP9 may inhibit platelet activity. Adult male C57BL/6 J mice were randomized to receive high-fat diet (HFD) or normal diet (ND). 8 weeks after HFD, animals were sacrificed, and both plasma CTRP9 and platelet aggregation were determined. HFD-fed animals increased weight gain significantly, and became hyperglycemic and hyperinsulinemic 8 weeks post-HFD. Compared to ND animals, HFD animals exhibited significantly decreased plasma CTRP9 concentration and increased platelet response to ADP, evidenced by augmented aggregation amplitude, steeper aggregation slope, larger area under the curve, and shorter lag time (P < 0.01). A significant negative correlation between plasma CTRP9 concentration and platelet aggregation amplitude was observed. More importantly, in vitro pre-treatment with CTRP9 significantly inhibited ADP-stimulated platelet activation in platelet samples from both ND and HFD animals. Taken together, our results suggest reduced plasma CTRP9 concentration during diabetes plays a causative role in platelet hyper-activity, contributing to platelet-induced cardiovascular damage during this pathologic condition. Enhancing CTRP9 production and/or exogenous supplementation of CTRP9 may protect against diabetic cardiovascular injury via inhibition of abnormal platelet activity.
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Affiliation(s)
- Wenqing Wang
- Department of Hematology, Tangdu Hospital, The Fourth Military Medical University, 710038, Xian, People's Republic of China.
| | - Wayne Bond Lau
- Department of Emergency Medicine, Thomas Jefferson University, 1025 Walnut Street, Philadelphia, PA, 19107, USA.
| | - Yajing Wang
- Department of Emergency Medicine, Thomas Jefferson University, 1025 Walnut Street, Philadelphia, PA, 19107, USA.
| | - Xinliang Ma
- Department of Emergency Medicine, Thomas Jefferson University, 1025 Walnut Street, Philadelphia, PA, 19107, USA.
| | - Rong Li
- Department of Geriatrics, Xijing Hospital, The Fourth Military Medical University, 710032, Xian, People's Republic of China.
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Danai LV, Roth Flach RJ, Virbasius JV, Garcia Menendez L, Jung DY, Kim JH, Kim JK, Czech MP. Inducible Deletion of Protein Kinase Map4k4 in Obese Mice Improves Insulin Sensitivity in Liver and Adipose Tissues. Mol Cell Biol 2015; 35:2356-65. [PMID: 25918248 PMCID: PMC4456439 DOI: 10.1128/mcb.00150-15] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 02/24/2015] [Accepted: 04/21/2015] [Indexed: 01/01/2023] Open
Abstract
Studies in vitro suggest that mitogen-activated protein kinase kinase kinase kinase 4 (Map4k4) attenuates insulin signaling, but confirmation in vivo is lacking since Map4k4 knockout is lethal during embryogenesis. We thus generated mice with floxed Map4k4 alleles and a tamoxifen-inducible Cre/ERT2 recombinase under the control of the ubiquitin C promoter to induce whole-body Map4k4 deletion after these animals reached maturity. Tamoxifen administration to these mice induced Map4k4 deletion in all tissues examined, causing decreased fasting blood glucose concentrations and enhanced insulin signaling to AKT in adipose tissue and liver but not in skeletal muscle. Surprisingly, however, mice generated with a conditional Map4k4 deletion in adiponectin-positive adipocytes or in albumin-positive hepatocytes displayed no detectable metabolic phenotypes. Instead, mice with Map4k4 deleted in Myf5-positive tissues, including all skeletal muscles tested, were protected from obesity-induced glucose intolerance and insulin resistance. Remarkably, these mice also showed increased insulin sensitivity in adipose tissue but not skeletal muscle, similar to the metabolic phenotypes observed in inducible whole-body knockout mice. Taken together, these results indicate that (i) Map4k4 controls a pathway in Myf5-positive cells that suppresses whole-body insulin sensitivity and (ii) Map4k4 is a potential therapeutic target for improving glucose tolerance and insulin sensitivity in type 2 diabetes.
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Affiliation(s)
- Laura V. Danai
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Rachel J. Roth Flach
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Joseph V. Virbasius
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Lorena Garcia Menendez
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Dae Young Jung
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Jong Hun Kim
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Jason K. Kim
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
- Department of Medicine, Division of Endocrinology, Metabolism and Diabetes, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Michael P. Czech
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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