1
|
Chang YH, Tseng YH, Wang JM, Tsai YS, Huang HS. TG-interacting factor 1 regulates mitotic clonal expansion during adipocyte differentiation. Biochim Biophys Acta Mol Cell Biol Lipids 2024; 1869:159492. [PMID: 38575107 DOI: 10.1016/j.bbalip.2024.159492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 03/01/2024] [Accepted: 03/28/2024] [Indexed: 04/06/2024]
Abstract
Obesity is one of the significant health challenges in the world and is highly associated with abnormal adipogenesis. TG-interacting factor 1 (TGIF1) is essential for differentiating murine adipocytes and human adipose tissue-derived stem cells. However, the mode of action needs to be better elucidated. To investigate the roles of TGIF1 in differentiation in-depth, CRISPR/Cas9 knockout technology was performed to generate TGIF1-silenced preadipocytes. The absence of TGIF1 in 3 T3-F442A preadipocytes abolished lipid accumulation throughout the differentiation using Oil Red O staining. Conversely, we established 3 T3-F442A preadipocytes stably expressing TGIF1 and doxycycline-inducible TGIF1 in TGIF1-silenced 3 T3-F442A preadipocytes. Remarkably, the induction of TGIF1 by doxycycline during the initial differentiation phase successfully promoted lipid accumulation in TGIF1-silenced 3 T3-F442A cells. We further explored the mechanisms of TGIF1 in early differentiation. We demonstrated that TGIF1 promoted the mitotic clonal expansion via upregulation of CCAAT/enhancer-binding proteins β expression, interruption with peroxisome proliferators activated receptor γ downstream regulation, and inhibition of p27kip1 expression. In conclusion, we strengthen the pivotal roles of TGIF1 in early differentiation, which might contribute to resolving obesity-associated metabolic syndromes.
Collapse
Affiliation(s)
- Yu-Hao Chang
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Research Division, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA.
| | - Ju-Ming Wang
- Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan.
| | - Yau-Sheng Tsai
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Huei-Sheng Huang
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| |
Collapse
|
2
|
Chang YH, Tseng YH, Wang JM, Tsai YS, Liu XL, Huang HS. Phosphorylation of TG-interacting factor 1 at carboxyl-terminal sites in response to insulin regulates adipocyte differentiation. FEBS Lett 2024; 598:945-955. [PMID: 38472156 DOI: 10.1002/1873-3468.14849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 01/17/2024] [Accepted: 01/28/2024] [Indexed: 03/14/2024]
Abstract
TG-interacting factor 1 (TGIF1) contributes to the differentiation of murine white preadipocyte and human adipose tissue-derived stem cells; however, its regulation is not well elucidated. Insulin is a component of the adipogenic cocktail that induces ERK signaling. TGIF1 phosphorylation and sustained stability in response to insulin were reduced through the use of specific MEK inhibitor U0126. Mutagenesis at T235 or T239 residue of TGIF1 in preadipocytes led to dephosphorylation of TGIF1. The reduced TGIF1 stability resulted in an increase in p27kip1 expression, a decrease in phosphorylated Rb expression and cellular proliferation, and a reduced accumulation of lipids compared to the TGIF1-overexpressed cells. These findings highlight that insulin/ERK-driven phosphorylation of the T235 or T239 residue at TGIF1 is crucial for adipocyte differentiation.
Collapse
Affiliation(s)
- Yu-Hao Chang
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Research Division, Joslin Diabetes Center, Harvard Medical School, Boston, MA, USA
| | - Ju-Ming Wang
- Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Yau-Sheng Tsai
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Xin-Lei Liu
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Huei-Sheng Huang
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| |
Collapse
|
3
|
Cho SY, Choi JS, Jung UJ. Effects of Ecklonia stolonifera Extract on Metabolic Dysregulation in High-Fat Diet-Induced Obese Mice. J Med Food 2024; 27:242-249. [PMID: 38354279 DOI: 10.1089/jmf.2023.k.0252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024] Open
Abstract
This study aimed to test the hypothesis that long-term and low-dose supplementation with an ethanol extract of Ecklonia stolonifera may confer protection against high-fat diet (HFD)-induced obesity in mice. Male C57BL/6J mice were divided into two groups, one of which was fed an HFD (40 kcal% fat) and the other an HFD+E. stolonifera (0.006%, w/w, ∼5 mg/kg body weight/day) for 16 weeks. E. stolonifera supplementation significantly reduced body weight from week 3 and until the end of the experiment. E. stolonifera-supplemented mice also exhibited lower fat mass (epididymal, perirenal, and mesenteric fat) and smaller adipocyte size than HFD control mice. The two groups displayed similar food intakes, but E. stolonifera markedly decreased lipogenesis and increased lipolysis and fatty acid oxidation in adipose tissue. Moreover, E. stolonifera significantly decreased plasma and hepatic lipid levels, hepatic lipid droplet accumulation, plasma aminotransferase levels, and liver weight by decreasing lipogenesis and increasing fatty acid oxidation. As E. stolonifera-supplemented mice showed improvements in hyperglycemia, insulin resistance, and inflammation, compared to control mice, it is possible that the beneficial effects of E. stolonifera on obesity might be associated with decreased inflammation and insulin resistance. Collectively, these results indicate that E. stolonifera could be used as a novel means of preventing and treating obesity and obesity-related metabolic disorders.
Collapse
Affiliation(s)
- Su Yeon Cho
- Department of Food Science and Nutrition, Pukyong National University, Busan, Korea
| | - Jae Sue Choi
- Department of Food Science and Nutrition, Pukyong National University, Busan, Korea
| | - Un Ju Jung
- Department of Food Science and Nutrition, Pukyong National University, Busan, Korea
| |
Collapse
|
4
|
Yang Z, Han X, Wang K, Fang J, Wang Z, Liu G. Combined with multiplex and network analysis to reveal the key genes and mechanisms of nonalcoholic fatty liver disease. Int Immunopharmacol 2023; 123:110708. [PMID: 37523974 DOI: 10.1016/j.intimp.2023.110708] [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: 04/28/2023] [Revised: 07/05/2023] [Accepted: 07/23/2023] [Indexed: 08/02/2023]
Abstract
BACKGROUND AND AIMS Non-alcoholic fatty liver disease (NAFLD) has become a significant cause of chronic liver disease in developed countries, as a result of the worldwide trend of obesity and associated metabolic syndrome. Obesity and high-fat diet (HFD) are very common in patients with NAFLD. However, how to screen out key differentially expressed genes (DEGs) is a challenging task. The purpose of this study is to study the screen of key genes and pathways of HFD on the formation process of non-alcoholic fatty liver through network pharmacological analysis. METHODS In this study, 173 genes associated with NAFLD were collected from the Gene Expression Omnibus (GEO) database. To find significant genes and pathways, combine network clustering analysis, topology analysis, and pathway analysis. RESULTS The results showed that there were four key signaling pathways related to HFD, including complement cascade, Atorvastatin ADME, Asthma and Aflatoxin activation and detoxification. In addition, we identified six representative key genes, including Ccl5, Tlr2, Cd274, Cxcl10, Cxcl9 and Cd74, and screened three intersecting genes in Mus musculus and Homo sapiens sample, including C3, F2 and C7. CONCLUSIONS In conclusion, our study constructed the NAFLD gene regulatory network of C57BL/6J mice for the first time and jointly analyzed the Mus musculus samples and Homo sapiens samples. It provides new insights for identifying potential biomarkers and valuable therapeutic clues, and puts forward a new method for web-based research. These findings may provide potential targets for early diagnosis, effective therapy and prognostic markers of NAFLD.
Collapse
Affiliation(s)
- Zhao Yang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, China.
| | - Xuebing Han
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, China.
| | - Keyu Wang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, China.
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, China.
| | - Zheng Wang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, China.
| | - Gang Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, China.
| |
Collapse
|
5
|
Perirenal Fat and Renal Congestion: A Double Burden on Kidney Function in Acute Decompensated Heart Failure. INTERNATIONAL JOURNAL OF HEART FAILURE 2023; 5:34-35. [PMID: 36818140 PMCID: PMC9902642 DOI: 10.36628/ijhf.2023.0005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023]
|
6
|
Transcriptomic Differences Between Monozygotic Adolescent Twins Discordant For Metabolic Syndrome Following Weight Loss: A Case Study. Twin Res Hum Genet 2022; 25:196-201. [DOI: 10.1017/thg.2022.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Abstract
This case reports peripheral blood mononuclear cell (PBMC) transcriptomic changes in a pair of male monozygotic pediatric twins with metabolic syndrome (MetS) undertaking assisted weight loss. These 14-year-old boys presented with similar baseline biochemistry and body composition. After a 16-week weight-loss intervention, percent body weight loss was similar (Twin A 12%, and Twin B 13%). MetS resolved in Twin A but Twin B maintained elevated triglycerides after weight loss. Analysis of the PBMC transcriptome before and after weight loss revealed very different changes in gene expression including differences in the direction of expression of genes related to immune cell activation. 48.7% of genes that were downregulated in Twin A were upregulated in Twin B. This case highlights a novel approach to report the influence of chronic low-grade inflammation and metabolic dysfunction on the PBMC transcriptome. It explores whether expression of genes related to immune functions may underlie the differences in response to weight loss or whether transcriptomic alterations in immune cells may precede more traditional biomarkers of chronic pro-inflammation. These monozygotic twins present an example of divergence of phenotypic outcomes despite identical genetic background and similar treatment response.
Collapse
|
7
|
Du K, Chen GH, Bai X, Chen L, Hu SQ, Li YH, Wang GZ, He JW, Lai SJ. Dynamics of transcriptome and chromatin accessibility revealed sequential regulation of potential transcription factors during the brown adipose tissue whitening in rabbits. Front Cell Dev Biol 2022; 10:981661. [PMID: 36225319 PMCID: PMC9548568 DOI: 10.3389/fcell.2022.981661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/07/2022] [Indexed: 11/13/2022] Open
Abstract
Brown adipose tissue (BAT) represents a valuable target for treating obesity in humans. BAT losses of thermogenic capacity and gains a “white adipose tissue-like (WAT-like)” phenotype (BAT whitening) under thermoneutral environments, which could lead to potential low therapy responsiveness in BAT-based obesity treatments. However, the epigenetic mechanisms of BAT whitening remain largely unknown. In this study, BATs were collected from rabbits at day0 (D0), D15, D85, and 2 years (Y2). RNA-sequencing (RNA-seq) and the assay for transposase-accessible chromatin with high-throughput sequencing (ATAC-seq) were performed to investigate transcriptome and chromatin accessibility of BATs at the four whitening stages, respectively. Our data showed that many genes and chromatin accessible regions (refer to as “peaks”) were identified as significantly changed during BAT whitening in rabbits. The BAT-selective genes downregulated while WAT-selective genes upregulated from D0 to Y2, and the de novo lipogenesis-related genes reached the highest expression levels at D85. Both the highly expressed genes and accessible regions in Y2 were significantly enriched in immune response-related signal pathways. Analysis of different relationships between peaks and their nearby genes found an increased proportion of the synchronous changes between chromatin accessibility and gene expression during BAT whitening. The synergistic changes between the chromatin accessibility of promoter and the gene expression were found in the key adipose genes. The upregulated genes which contained increased peaks were significantly enriched in the PI3K-Akt signaling pathway, steroid biosynthesis, TGF-beta signaling pathway, osteoclast differentiation, and dilated cardiomyopathy. Moreover, the footprinting analysis suggested that sequential regulation of potential transcription factors (TFs) mediated the loss of thermogenic phenotype and the gain of a WAT-like phenotype of BAT. In conclusion, our study provided the transcriptional and epigenetic frameworks for understanding BAT whitening in rabbits for the first time and might facilitate potential insights into BAT-based obesity treatments.
Collapse
Affiliation(s)
- Kun Du
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Guan-He Chen
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Xue Bai
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Li Chen
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Shen-Qiang Hu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Yan-Hong Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
| | - Guo-Ze Wang
- School of Public Health, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China
| | - Jing-Wei He
- Sichuan Animal Husbandry Station, Chengdu, China
| | - Song-Jia Lai
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China
- *Correspondence: Song-Jia Lai,
| |
Collapse
|
8
|
Stachydrine derived from fermented rice prevents diet-induced obesity by regulating adipsin and endoplasmic reticulum homeostasis. J Nutr Biochem 2022; 107:109036. [PMID: 35533898 DOI: 10.1016/j.jnutbio.2022.109036] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 01/13/2022] [Accepted: 03/21/2022] [Indexed: 11/20/2022]
Abstract
Makgeolli, a widely consumed traditional alcoholic beverage in Korea, is brewed mainly from rice using Nuruk as a fermentation starter, which contains fungi, yeast, and lactic acid bacteria. Among 58 Makgeolli samples brewed using various Nuruks, we found that one exhibited anti-obesity properties, with stachydrine shown to be responsible for these properties. Stachydrine promotes lipolysis and inhibits lipid accumulation in 3T3-L1 adipocytes; it also reduces weight gain and improves glucose tolerance and insulin resistance in a mouse model. Stachydrine dramatically suppresses adipsin mRNA levels in liver and adipose tissue, whereas serum adipsin levels were elevated in stachydrine-treated mice compared to mice fed a high-fat diet alone. Moreover, stachydrine recovers endoplasmic reticulum homeostasis and regulates adipsin expression. We highlight the potential use of stachydrine as a therapeutic agent for the treatment of obesity and insulin resistance and the use of Makgeolli fermented by Nuruk as a source of novel bioactive compounds.
Collapse
|
9
|
Schwartz C, Schmidt V, Deinzer A, Hawerkamp HC, Hams E, Bayerlein J, Röger O, Bailer M, Krautz C, El Gendy A, Elshafei M, Heneghan HM, Hogan AE, O'Shea D, Fallon PG. Innate PD-L1 limits T cell-mediated adipose tissue inflammation and ameliorates diet-induced obesity. Sci Transl Med 2022; 14:eabj6879. [PMID: 35263149 DOI: 10.1126/scitranslmed.abj6879] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Obesity has become a major health problem in the industrialized world. Immune regulation plays an important role in adipose tissue homeostasis; however, the initial events that shift the balance from a noninflammatory homeostatic environment toward inflammation leading to obesity are poorly understood. Here, we report a role for the costimulatory molecule programmed death-ligand 1 (PD-L1) in the limitation of diet-induced obesity. Functional ablation of PD-L1 on dendritic cells (DCs) using conditional knockout mice increased weight gain and metabolic syndrome during diet-induced obesity, whereas PD-L1 expression on type 2 innate lymphoid cells (ILC2s), T cells, and macrophages was dispensable for obesity control. Using in vitro cocultures, DCs interacted with T cells and ILC2s via the PD-L1:PD-1 axis to inhibit T helper type 1 proliferation and promote type 2 polarization, respectively. A role for PD-L1 in adipose tissue regulation was also shown in humans, with a positive correlation between PD-L1 expression in visceral fat of people with obesity and elevated body weight. Thus, we define a mechanism of adipose tissue homeostasis controlled by the expression of PD-L1 by DCs, which may be a clinically relevant finding with regard to immune-related adverse events during immune checkpoint inhibitor therapy.
Collapse
Affiliation(s)
- Christian Schwartz
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany.,Medical Immunology Campus Erlangen, FAU Erlangen-Nürnberg, D-91054 Erlangen, Germany.,Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin, D02R590 Dublin 2, Ireland
| | - Viviane Schmidt
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Andrea Deinzer
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Heike C Hawerkamp
- Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin, D02R590 Dublin 2, Ireland
| | - Emily Hams
- Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin, D02R590 Dublin 2, Ireland
| | - Jasmin Bayerlein
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Ole Röger
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Moritz Bailer
- Mikrobiologisches Institut - Klinische Mikrobiologie, Immunologie und Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Christian Krautz
- Klinik für Allgemein- und Viszeralchirurgie, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Amr El Gendy
- Klinik für Allgemein- und Viszeralchirurgie, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Moustafa Elshafei
- Klinik für Allgemein- und Viszeralchirurgie, Universitätsklinikum Erlangen and Friedrich-Alexander Universität (FAU) Erlangen-Nürnberg, D-91054 Erlangen, Germany
| | - Helen M Heneghan
- Department of Surgery, St. Vincent's University Hospital and University College Dublin, D04T6F4 Dublin 4, Ireland
| | - Andrew E Hogan
- Kathleen Lonsdale Human Health Institute, Maynooth University, W23F2H6 Maynooth, Co. Kildare, Ireland.,Obesity Immunology Research, St. Vincent's University Hospital and University College Dublin, D04T6F4 Dublin 4, Ireland
| | - Donal O'Shea
- Obesity Immunology Research, St. Vincent's University Hospital and University College Dublin, D04T6F4 Dublin 4, Ireland
| | - Padraic G Fallon
- Trinity Biomedical Sciences Institute, School of Medicine, Trinity College Dublin, D02R590 Dublin 2, Ireland
| |
Collapse
|
10
|
Gomez GA, Rundle CH, Xing W, Kesavan C, Pourteymoor S, Lewis RE, Powell DR, Mohan S. Contrasting effects of <i>Ksr2</i>, an obesity gene, on trabecular bone volume and bone marrow adiposity. eLife 2022; 11:82810. [PMID: 36342465 PMCID: PMC9640193 DOI: 10.7554/elife.82810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 10/06/2022] [Indexed: 11/25/2022] Open
Abstract
Pathological obesity and its complications are associated with an increased propensity for bone fractures. Humans with certain genetic polymorphisms at the kinase suppressor of ras2 (KSR2) locus develop severe early-onset obesity and type 2 diabetes. Both conditions are phenocopied in mice with <i>Ksr2</i> deleted, but whether this affects bone health remains unknown. Here we studied the bones of global <i>Ksr2</i> null mice and found that <i>Ksr2</i> negatively regulates femoral, but not vertebral, bone mass in two genetic backgrounds, while the paralogous gene, <i>Ksr1</i>, was dispensable for bone homeostasis. Mechanistically, KSR2 regulates bone formation by influencing adipocyte differentiation at the expense of osteoblasts in the bone marrow. Compared with <i>Ksr2</i>'s known role as a regulator of feeding by its function in the hypothalamus, pair-feeding and osteoblast-specific conditional deletion of <i>Ksr2</i> reveals that <i>Ksr2</i> can regulate bone formation autonomously. Despite the gains in appendicular bone mass observed in the absence of <i>Ksr2</i>, bone strength, as well as fracture healing response, remains compromised in these mice. This study highlights the interrelationship between adiposity and bone health and provides mechanistic insights into how <i>Ksr2</i>, an adiposity and diabetic gene, regulates bone metabolism.
Collapse
Affiliation(s)
| | - Charles H Rundle
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| | - Weirong Xing
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| | - Chandrasekhar Kesavan
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| | | | | | | | - Subburaman Mohan
- VA Loma Linda Healthcare SystemLoma LindaUnited States,Loma Linda University Medical CenterLoma LindaUnited States
| |
Collapse
|
11
|
Ishii Y, Abe I, Kira S, Harada T, Takano M, Oniki T, Kondo H, Teshima Y, Yufu K, Shuto T, Wada T, Nakagawa M, Shimada T, Asayama Y, Miyamoto S, Takahashi N. Detection of fibrotic remodeling of epicardial adipose tissue in patients with atrial fibrillation: Imaging approach based on histological observation. Heart Rhythm O2 2021; 2:311-323. [PMID: 34430935 PMCID: PMC8369308 DOI: 10.1016/j.hroo.2021.05.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background Fibrotic remodeling of epicardial adipose tissue (EAT) is crucial for proinflammatory atrial myocardial fibrosis, which leads to atrial fibrillation (AF). Objectives We tested the hypothesis that the ratio of central to marginal adipocyte diameter in EAT represents its fibrotic remodeling. Based on a similar concept, we also tested whether the percent (%) change in EAT fat attenuation determined using computed tomographic (CT) images can detect this remodeling. Methods Left atrial appendages were obtained from 76 consecutive AF patients during cardiovascular surgery. EAT in the central area (central EAT: C-EAT) and that adjacent to the atrial myocardium (Marginal EAT: M-EAT) were evaluated histologically. CT images for all of the 76 patients were also analyzed. Results The adipocyte diameter was smaller, fibrotic remodeling of EAT (EAT fibrosis) was more severe, and infiltration of macrophages and myofibroblasts was more extensive in M-EAT than in C-EAT. EAT fibrosis was positively correlated with adipocyte diameter in C-EAT and negatively correlated in M-EAT, resulting in a positive correlation between EAT fibrosis and the ratio of central to marginal adipocyte diameter (C/M diameter ratio; r = 0.73, P < .01). The C/M diameter ratio was greater in patients with persistent AF than in those with paroxysmal AF. CT images demonstrated that the %change in EAT fat attenuation was positively correlated with EAT fibrosis. Conclusion Our results suggest that the central-to-marginal adipocyte diameter ratio is tightly associated with fibrotic remodeling of EAT. In addition, the %change in EAT fat attenuation determined using CT imaging can detect remodeling noninvasively.
Collapse
Affiliation(s)
- Yumi Ishii
- Department of Cardiology and Clinical Examination
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination
| | | | | | | | | | | | | | - Kunio Yufu
- Department of Cardiology and Clinical Examination
| | | | | | | | - Tatsuo Shimada
- Oita Medical Technology School, College of Judo Therapy and Acupuncture-Moxibustion, Oita, Japan
| | - Yoshiki Asayama
- Department of Radiology, Oita University Faculty of Medicine, Oita, Japan
| | | | | |
Collapse
|
12
|
Yang L, Song S, Li S, Chen Y, Chen CLP. Discriminative Dimension Reduction via Maximin Separation Probability Analysis. IEEE TRANSACTIONS ON CYBERNETICS 2021; 51:4100-4111. [PMID: 31094699 DOI: 10.1109/tcyb.2019.2912806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this paper, we propose a novel discriminative dimension reduction (DR) method, maximin separation probability analysis (MSPA), which maximizes the minimum separation probability of all classes in the reduced low-dimensional subspace. Separation probability is a novel class separability measure, which gives a lower bound of the generalization accuracy for a learned linear classifier in a binary classification problem. The proposed MSPA duly considers the separation of all class pairs in multiclass linear discriminant analysis (LDA) and thus improves the subsequent classification performance. DR via MSPA leads to a nonconvex optimization problem. We develop an algorithm to solve the problem and the global optimal solution can be found by converting the original problem into a series of second-order cone programming problems. A low-computational cost extension and a non-LDA with kernel mapping of MSPA are also provided in this paper. The experimental results on 14 real-world datasets show our methods are superior to other state-of-the-art algorithms in discriminative DR tasks.
Collapse
|
13
|
Sarkar P, Thirumurugan K. In silico explanation for the causalities of deleterious RNF213 SNPs in Moyamoya disease and insulin resistance. Comput Biol Chem 2021; 92:107488. [PMID: 33930741 DOI: 10.1016/j.compbiolchem.2021.107488] [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: 07/14/2020] [Revised: 12/08/2020] [Accepted: 04/20/2021] [Indexed: 11/30/2022]
Abstract
Moyamoya disease (MMD), a cerebrovascular disorder caused by the RNF213 gene, is a cerebrovascular, neurological disorder leading to ischemic strokes. Our previous work suggested that RNF213 might be involved in the pro-inflammatory TNFα-mediated insulin-resistance pathway in adipocytes. Insulin resistance can lead to cerebrovascular diseases and ischemic strokes. Though p. R4810 K has been reported as the founder mutation for Asian population with this disease, there are several mutations continuously reported in clinical diagnosis. We are interested to know whether these mutations can modulate insulin resistance. Also, we are intended to understand the causalities of RNF213 and its associated mutations in MMD. For this, we have adopted a computational approach to characterize RNF213 and its naturally occurring SNPs. Clinically reported SNPs and the predicted SNPs were analyzed for their pathogenicity and effect on the biological function of the protein. To increase accuracy, this was performed through three different analysis software (PROVEAN, SIFT, and SNAP2). The mutations that were found to be deleterious in all the three platforms were further analyzed for their effect on the thermal stability of the protein through I-mutant and iStable. It was found that R4810 K and other mutations decreased the thermodynamic stability of the protein. Loss of function of RNF213 was suggested in some reports. Contrary to this, some studies reported a gain of function state due to the R4810K mutation. To understand this we have measured the ligand-binding ability of this mutated protein through COFACTOR and COACH. An increase in ligand binding is always related to the functional stability of a protein. We have observed that the R4810K mutation might increase the iron-binding efficiency of the amino acid residues. This increase in binding was further validated by analyzing the binding efficiencies by docking. Since RNF213 was previously reported as a target for Protein Tyrosine Phosphatase 1B (PTP1B), we have also analyzed whether PTP1B-binding positions are susceptible to mutations. We have re-analyzed our earlier report on the differential expression pattern of RNF213 in cancer and obese samples. We have provided a detailed analysis of the most deleterious SNPs related to RNF213. Also, we provide a prediction for the loss of function and gain of function attributes of RNF213 and its predicted causalities in MMD and insulin resistance.
Collapse
Affiliation(s)
- Priyanka Sarkar
- 206, Structural Biology Lab, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, India
| | - Kavitha Thirumurugan
- 206, Structural Biology Lab, Centre for Biomedical Research, School of Biosciences & Technology, Vellore Institute of Technology, Vellore, India.
| |
Collapse
|
14
|
Sárvári AK, Van Hauwaert EL, Markussen LK, Gammelmark E, Marcher AB, Ebbesen MF, Nielsen R, Brewer JR, Madsen JGS, Mandrup S. Plasticity of Epididymal Adipose Tissue in Response to Diet-Induced Obesity at Single-Nucleus Resolution. Cell Metab 2021; 33:437-453.e5. [PMID: 33378646 DOI: 10.1016/j.cmet.2020.12.004] [Citation(s) in RCA: 148] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 09/18/2020] [Accepted: 12/04/2020] [Indexed: 12/21/2022]
Abstract
Adipose tissues display a remarkable ability to adapt to the dietary status. Here, we have applied single-nucleus RNA-seq to map the plasticity of mouse epididymal white adipose tissue at single-nucleus resolution in response to high-fat-diet-induced obesity. The single-nucleus approach allowed us to recover all major cell types and to reveal distinct transcriptional stages along the entire adipogenic trajectory from preadipocyte commitment to mature adipocytes. We demonstrate the existence of different adipocyte subpopulations and show that obesity leads to disappearance of the lipogenic subpopulation and increased abundance of the stressed lipid-scavenging subpopulation. Moreover, obesity is associated with major changes in the abundance and gene expression of other cell populations, including a dramatic increase in lipid-handling genes in macrophages at the expense of macrophage-specific genes. The data provide a powerful resource for future hypothesis-driven investigations of the mechanisms of adipocyte differentiation and adipose tissue plasticity.
Collapse
Affiliation(s)
- Anitta Kinga Sárvári
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Elvira Laila Van Hauwaert
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Lasse Kruse Markussen
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Ellen Gammelmark
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Ann-Britt Marcher
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Morten Frendø Ebbesen
- Danish Molecular Biomedical Imaging Center, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Ronni Nielsen
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Jonathan Richard Brewer
- Danish Molecular Biomedical Imaging Center, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark
| | - Jesper Grud Skat Madsen
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark.
| | - Susanne Mandrup
- Center for Functional Genomics and Tissue Plasticity, Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense M 5230, Denmark.
| |
Collapse
|
15
|
Zhang Y, Fu Y, Zheng Y, Wen Z, Wang C. Identification of differentially expressed mRNA and the Hub mRNAs modulated by lncRNA Meg3 as a competing endogenous RNA in brown adipose tissue of mice on a high-fat diet. Adipocyte 2020; 9:346-358. [PMID: 32614631 PMCID: PMC7469684 DOI: 10.1080/21623945.2020.1789283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Obesity is associated with insulin resistance, diabetes, and obesity-related metabolic disorders. Brown adipocytes have emerged as potential targets for the treatment of obesity and obesity-related diseases. However, changes that occur in brown adipose tissue during various stages of high fat diet (HFD)-induced obesity remain poorly understood. The present study aimed to determine the changes occurring in brown adipose tissue during various stages of an HFD by analyzing two microarray expression profiles. A total of 1,337 differentially expressed RNAs (DE RNAs) were identified between the HFD and ND groups, using the limma package in R. The DE RNAs included 1,249 mRNAs, 74 long non coding RNAs (lncRNAs), and 14 pseudogenes. Functional annotation of the DE mRNAs, including GO terms and KEGG pathways were identified using the Database for Annotation, Visualization, and Integrated Discovery. A protein-protein interaction network was constructed using STRING and clusters were obtained through the Molecular Complex Detection plug-in. In the present study, the lncRNA,maternally expressed gene 3 (Meg3), was identified as the DE lncRNA with a significant fold change. The network of Meg3 as a ceRNA was constructed, which demonstrated that Meg3 modulated five hub DE mRNAs via competitive binding to microRNAs.
Collapse
Affiliation(s)
- Yemin Zhang
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
- Demonstration Center for Experimental Basic Medicine Education of Wuhan University, Wuhan, Hubei, China
| | - Yalin Fu
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
| | - Yuyang Zheng
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
| | - Zhongyuan Wen
- Department of Endocrinology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Changhua Wang
- Department of Pathology & Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, China
- Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, China
| |
Collapse
|
16
|
Wang L, Hu J, Zhou H. Macrophage and Adipocyte Mitochondrial Dysfunction in Obesity-Induced Metabolic Diseases. World J Mens Health 2020; 39:606-614. [PMID: 33151047 PMCID: PMC8443980 DOI: 10.5534/wjmh.200163] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 09/28/2020] [Accepted: 10/04/2020] [Indexed: 12/11/2022] Open
Abstract
Obesity is one of major health burdens of modern society as it contributes to the growing prevalence of its related comorbidities, such as diabetes, cardiovascular diseases, and some cancers. A series of innate immune cells, especially macrophages, and adipocytes have been implicated in the pathogenesis of obesity. Mitochondrial dysfunction, which is induced by obesity, are critical mediators in initiating inflammation in macrophages and adipocytes, and subsequent systemic insulin resistance. In this review, we discuss new findings on how obesity impairs mitochondrial function in macrophages and adipocytes and how this dysfunction contributes to obesity and its comorbidities. We also summarize drugs that treat metabolic diseases by targeting mitochondrial dysfunction.
Collapse
Affiliation(s)
- Liwen Wang
- Department of Metabolism and Endocrinology, the Second Xiangya Hospital, Central South University, Hunan, China.,National Clinical Research Center for Metabolic Diseases, Key Laboratory of Diabetes Immunology, Ministry of Education, Metabolic Syndrome Research Center, the Second Xiangya Hospital, Central South University, Hunan, China
| | - Jie Hu
- Department of Metabolism and Endocrinology, the Second Xiangya Hospital, Central South University, Hunan, China.,National Clinical Research Center for Metabolic Diseases, Key Laboratory of Diabetes Immunology, Ministry of Education, Metabolic Syndrome Research Center, the Second Xiangya Hospital, Central South University, Hunan, China
| | - Haiyan Zhou
- Department of Metabolism and Endocrinology, the Second Xiangya Hospital, Central South University, Hunan, China.,National Clinical Research Center for Metabolic Diseases, Key Laboratory of Diabetes Immunology, Ministry of Education, Metabolic Syndrome Research Center, the Second Xiangya Hospital, Central South University, Hunan, China.
| |
Collapse
|
17
|
Chen J, Cao H, Lian M, Fang J. Five genes influenced by obesity may contribute to the development of thyroid cancer through the regulation of insulin levels. PeerJ 2020; 8:e9302. [PMID: 33240576 PMCID: PMC7676376 DOI: 10.7717/peerj.9302] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 05/15/2020] [Indexed: 12/30/2022] Open
Abstract
Previous studies indicate that obesity is an important contributor to the proceeding of thyroid cancer (TC) with limited knowledge of the underlying mechanism. Here, we hypothesize that molecules affected by obesity may play roles in the development of TC. To test the hypothesis above, we first conducted a large-scale literature-based data mining to identify genes influenced by obesity and genes related to TC. Then, a mega-analysis was conducted to study the expression changes of the obesity-specific genes in the case of TC, using 16 independent TC array-expression datasets (783 TC cases and 439 healthy controls). After that, pathway analysis was performed to explore the functional profile of the selected target genes and their potential connections with TC. We identified 1,036 genes associated with TC and 534 regulated by obesity, demonstrating a significant overlap (N = 176, p-value = 4.07e−112). Five out of the 358 obesity-specific genes, FABP4, CFD, GHR, TNFRSF11B, and LTF, presented significantly decreased expression in TC patients (LFC<−1.44; and p-value < 1e−7). Multiple literature-based pathways were identified where obesity could promote the pathologic development of TC through the regulation of these five genes and INS levels. The five obesity genes uncovered could be novel genes that play roles in the etiology of TC through the modulation of INS levels.
Collapse
Affiliation(s)
- Jiaming Chen
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Hongbao Cao
- Department of Psychiatry, First Hospital/First Clinical Medical College of Shanxi Medical University, Taiyuan, China.,School of Systems Biology, George Mason University, Fairfax, VA, United States of America
| | - Meng Lian
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jugao Fang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
18
|
Koo BK, Denenberg JO, Wright CM, Criqui MH, Allison MA. Associations of Perirenal Fat Thickness with Renal and Systemic Calcified Atherosclerosis. Endocrinol Metab (Seoul) 2020; 35:122-131. [PMID: 32207272 PMCID: PMC7090296 DOI: 10.3803/enm.2020.35.1.122] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/27/2019] [Accepted: 01/02/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND We investigated associations between perirenal fat thickness and atherosclerotic calcification in six different vascular beds. METHODS Using a community-based cohort (n=3,919), perirenal fat thickness was estimated from computed tomography scans. It was classified as Q1 (the lowest quartile) to Q4 (the highest quartile) in each sex. Calcification in the carotid arteries, coronary arteries, thoracic aorta, abdominal aorta, iliac arteries, and renal arteries was evaluated. RESULTS Perirenal fat thickness was associated with older age (P<0.01) and a higher prevalence of obesity, hypertension, and dyslipidemia (P<0.01 for all). Perirenal fat thickness was independently associated with renal arterial calcification even after adjustment for age, sex, body mass index, hypertension, dyslipidemia, smoking history, and family history of heart diseases in first-degree relatives (odds ratio [OR] per quartile of perirenal fat thickness, 1.25; 95% confidence interval [CI], 1.09 to 1.44). Compared to Q1, the odds of renal arterial calcification in Q4 was about two times higher (OR, 2.05; 95% CI, 1.29 to 3.25). After adjustment for renal arterial calcification and atherosclerotic risk factors, the only other vascular bed where perirenal fat thickness showed a significant association with calcification was the abdominal aorta (OR, 1.11; 95% CI, 1.00 to 1.23; P=0.045). CONCLUSION Perirenal fat thickness was independently associated with vascular calcification in the renal artery and abdominal aorta.
Collapse
Affiliation(s)
- Bo Kyung Koo
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Korea.
| | - Julie O Denenberg
- Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, USA
| | - C Michael Wright
- Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, USA
| | - Michael H Criqui
- Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, USA
| | - Matthew A Allison
- Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, USA
| |
Collapse
|
19
|
Wei T, Zhong J. A Preliminary Study of Knowledge Transfer in Multi-Classification Using Gene Expression Programming. Front Neurosci 2020; 13:1396. [PMID: 32009880 PMCID: PMC6978847 DOI: 10.3389/fnins.2019.01396] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 12/10/2019] [Indexed: 12/04/2022] Open
Abstract
Gene Expression Programming (GEP), a variant of Genetic Programming (GP), is a well established technique for automatic generation of computer programs. Due to the flexible representation, GEP has long been concerned as a classification algorithm for various applications. Whereas, GEP cannot be extended to multi-classification directly, and thus is only capable of treating an M-classification task as M separate binary classifications without considering the inter-relationship among classes. Consequently, GEP-based multi-classifier may suffer from output conflict of various class labels, and the underlying conflict can probably lead to the degraded performance in multi-classification. This paper employs evolutionary multitasking optimization paradigm in an existing GEP-based multi-classification framework, so as to alleviate the output conflict of each separate binary GEP classifier. Therefore, several knowledge transfer strategies are implemented to enable the interation among the population of each separate binary task. Experimental results on 10 high-dimensional datasets indicate that knowledge transfer among separate binary classifiers can enhance multi-classification performance within the same computational budget.
Collapse
Affiliation(s)
- Tingyang Wei
- School of Computer Science and Engineering, South China University of Technology, Guangzhou, China
| | - Jinghui Zhong
- School of Computer Science and Engineering, South China University of Technology, Guangzhou, China.,Sino-Singapore International Joint Research Institute, Guangzhou, China
| |
Collapse
|
20
|
Hoshino S, Kobayashi M, Tagawa R, Konno R, Abe T, Furuya K, Miura K, Wakasawa H, Okita N, Sudo Y, Mizunoe Y, Nakagawa Y, Nakamura T, Kawabe H, Higami Y. WWP1 knockout in mice exacerbates obesity-related phenotypes in white adipose tissue but improves whole-body glucose metabolism. FEBS Open Bio 2020; 10:306-315. [PMID: 31965758 PMCID: PMC7050250 DOI: 10.1002/2211-5463.12795] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/27/2019] [Accepted: 01/16/2020] [Indexed: 12/31/2022] Open
Abstract
White adipose tissue (WAT) is important for maintenance of homeostasis, because it stores energy and secretes adipokines. The WAT of obese people demonstrates mitochondrial dysfunction, accompanied by oxidative stress, which leads to insulin resistance. WW domain-containing E3 ubiquitin protein ligase 1 (WWP1) is a member of the HECT-type E3 family of ubiquitin ligases and is associated with several diseases. Recently, we demonstrated that WWP1 is induced specifically in the WAT of obese mice, where it protects against oxidative stress. Here, we investigated the function of WWP1 in WAT of obese mice by analyzing the phenotype of Wwp1 knockout (KO) mice fed a high-fat diet. The levels of oxidative stress markers were higher in obese WAT from Wwp1 KO mice. Moreover, Wwp1 KO mice had lower activity of citrate synthase, a mitochondrial enzyme. We also measured AKT phosphorylation in obese WAT and found lower levels in Wwp1 KO mice. However, plasma insulin level was low and glucose level was unchanged in obese Wwp1 KO mice. Moreover, both glucose tolerance test and insulin tolerance test were improved in obese Wwp1 KO mice. These findings indicate that WWP1 participates in the antioxidative response and mitochondrial function in WAT, but knockdown of WWP1 improves whole-body glucose metabolism.
Collapse
Affiliation(s)
- Shunsuke Hoshino
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Masaki Kobayashi
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Ryoma Tagawa
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Ryutaro Konno
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Takuro Abe
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Kazuhiro Furuya
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Kumi Miura
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Hiroki Wakasawa
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Naoyuki Okita
- Division of Pathological Biochemistry, Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University, Sanyo-onoda, Japan
| | - Yuka Sudo
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| | - Yuhei Mizunoe
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Yoshimi Nakagawa
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Takeshi Nakamura
- Division of Biosignaling, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Japan
| | - Hiroshi Kawabe
- Department of Molecular Neurobiology, Max Planck Institute of Experimental Medicine, Göttingen, Germany.,Division of Pathogenic Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Chuo-ku, Kobe, Japan.,Department of Gerontology, Laboratory of Molecular Life Science, Institute of Biomedical Research and Innovation, Foundation for Biomedical Research and Innovation at Kobe, Japan
| | - Yoshikazu Higami
- Laboratory of Molecular Pathology and Metabolic Disease, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda, Japan
| |
Collapse
|
21
|
Kim EY, Noh HM, Choi B, Park JE, Kim JE, Jang Y, Lee HK, Chang EJ. Interleukin-22 Induces the Infiltration of Visceral Fat Tissue by a Discrete Subset of Duffy Antigen Receptor for Chemokine-Positive M2-Like Macrophages in Response to a High Fat Diet. Cells 2019; 8:E1587. [PMID: 31817755 PMCID: PMC6953014 DOI: 10.3390/cells8121587] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/03/2019] [Accepted: 12/05/2019] [Indexed: 12/14/2022] Open
Abstract
Interleukin-22 (IL-22) is a cytokine with important functions in host defense and inflammatory responses and has recently been suggested to play a role in immune-inflammatory system in the context of obesity and its metabolic consequences. The specific cellular targets and mechanisms of IL-22-mediated obesity are largely unknown however. We here identified a previously unknown subset of monocyte-derived Duffy antigen receptors for chemokines (DARC)+ macrophages in epididymal fat adipose tissue and found that they are preferentially recruited into the crown-like structures of adipose tissue in the mouse upon high fat diet-induced obesity. Importantly, DARC+ macrophages highly express the IL-22 receptor (IL-22Ra1). Exposure to recombinant IL-22 shifts macrophages to an alternative M2 polarization pathway and augments DARC expression via a STAT5b signaling axis. STAT5b directly binds to the DARC promoter and a STAT5 inhibitor abrogates the IL-22-mediated induction of DARC. These M2-like DARC+ subpopulations of monocytes/macrophages were elevated in obese db/db mice compared to WT lean mice. Furthermore, subsets of CD14+ and/or CD16+ monocytes/macrophages within human peripheral blood mononuclear cell populations express DARC and the prevalence of these subsets is enhanced by IL-22 stimuli. This suggested that IL-22 is a critical cytokine that promotes the infiltration of adipose tissue macrophages, that regulate inflammatory processes. Taken together, our present findings provide important insights into the molecular mechanism by which IL-22 signal modulates DARC expression in M2-like macrophages.
Collapse
Affiliation(s)
- Eun-Young Kim
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (E.-Y.K.); (B.C.); (J.-E.P.); (J.-E.K.); (Y.J.)
- Stem Cell Immunomodulation Research Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Hye Mi Noh
- Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul 06273, Korea;
| | - Bongkun Choi
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (E.-Y.K.); (B.C.); (J.-E.P.); (J.-E.K.); (Y.J.)
- Stem Cell Immunomodulation Research Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Ji-Eun Park
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (E.-Y.K.); (B.C.); (J.-E.P.); (J.-E.K.); (Y.J.)
- Stem Cell Immunomodulation Research Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Ji-Eun Kim
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (E.-Y.K.); (B.C.); (J.-E.P.); (J.-E.K.); (Y.J.)
- Stem Cell Immunomodulation Research Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Youngsaeng Jang
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (E.-Y.K.); (B.C.); (J.-E.P.); (J.-E.K.); (Y.J.)
| | - Hyung Keun Lee
- Department of Ophthalmology, Institute of Vision Research, Yonsei University College of Medicine, Seoul 06273, Korea;
- Department of Pharmacy, Integrated Science and Engineering Division, Yonsei University, Incheon 21983, Korea
| | - Eun-Ju Chang
- Department of Biomedical Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea; (E.-Y.K.); (B.C.); (J.-E.P.); (J.-E.K.); (Y.J.)
- Stem Cell Immunomodulation Research Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| |
Collapse
|
22
|
Lin JZ, Rabhi N, Farmer SR. Myocardin-Related Transcription Factor A Promotes Recruitment of ITGA5+ Profibrotic Progenitors during Obesity-Induced Adipose Tissue Fibrosis. Cell Rep 2019; 23:1977-1987. [PMID: 29768198 DOI: 10.1016/j.celrep.2018.04.057] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 02/12/2018] [Accepted: 04/13/2018] [Indexed: 01/29/2023] Open
Abstract
Adipose tissue fibrosis is associated with inflammation and insulin resistance in human obesity. In particular, visceral fat fibrosis is correlated with hyperlipidemia and ectopic fat accumulation. Myocardin-related transcription factor A (MRTFA) is an important coactivator that mediates the transcription of extracellular matrix and other fibrogenic genes. Here, we examine the role of MRTFA in the development of adipose tissue fibrosis and identify a signaling pathway that regulates the fate of vascular progenitors. We demonstrate that obesity induces the formation of Sca1-, Sma+, ITGA5+ fibrogenic progenitor cells (FPCs) in adipose tissue. MRTFA deficiency in mice shifts the fate of perivascular progenitors from FPCs to adipocyte precursor cells and protects against chronic obesity-induced fibrosis and accompanying metabolic dysfunction, without a shift in energy expenditure. Our findings highlight the ITGA5-MRTFA pathway as a potential target to ameliorate obesity-associated metabolic disease.
Collapse
Affiliation(s)
- Jean Z Lin
- Department of Biochemistry, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA
| | - Nabil Rabhi
- Department of Biochemistry, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA
| | - Stephen R Farmer
- Department of Biochemistry, Boston University School of Medicine, 72 East Concord Street, Boston, MA 02118, USA.
| |
Collapse
|
23
|
Cárdenas-Ovando RA, Fernández-Figueroa EA, Rueda-Zárate HA, Noguez J, Rangel-Escareño C. A feature selection strategy for gene expression time series experiments with hidden Markov models. PLoS One 2019; 14:e0223183. [PMID: 31600242 PMCID: PMC6786538 DOI: 10.1371/journal.pone.0223183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 09/16/2019] [Indexed: 01/11/2023] Open
Abstract
Studies conducted in time series could be far more informative than those that only capture a specific moment in time. However, when it comes to transcriptomic data, time points are sparse creating the need for a constant search for methods capable of extracting information out of experiments of this kind. We propose a feature selection algorithm embedded in a hidden Markov model applied to gene expression time course data on either single or even multiple biological conditions. For the latter, in a simple case-control study features or genes are selected under the assumption of no change over time for the control samples, while the case group must have at least one change. The proposed model reduces the feature space according to a two-state hidden Markov model. The two states define change/no-change in gene expression. Features are ranked in consonance with three scores: number of changes across time, magnitude of such changes and quality of replicates as a measure of how much they deviate from the mean. An important highlight is that this strategy overcomes the few samples limitation, common in transcriptome experiments through a process of data transformation and rearrangement. To prove this method, our strategy was applied to three publicly available data sets. Results show that feature domain is reduced by up to 90% leaving only few but relevant features yet with findings consistent to those previously reported. Moreover, our strategy proved to be robust, stable and working on studies where sample size is an issue otherwise. Hence, even with two biological replicates and/or three time points our method proves to work well.
Collapse
Affiliation(s)
- Roberto A. Cárdenas-Ovando
- School of Engineering and Sciences, Tecnológico de Monterrey, Mexico City, Mexico
- Computational Genomics Lab, Instituto Nacional de Medicina Genómica, Mexico City, Mexico
| | | | - Héctor A. Rueda-Zárate
- School of Engineering and Sciences, Tecnológico de Monterrey, Mexico City, Mexico
- Computational Genomics Lab, Instituto Nacional de Medicina Genómica, Mexico City, Mexico
| | - Julieta Noguez
- School of Engineering and Sciences, Tecnológico de Monterrey, Mexico City, Mexico
| | - Claudia Rangel-Escareño
- Computational Genomics Lab, Instituto Nacional de Medicina Genómica, Mexico City, Mexico
- * E-mail:
| |
Collapse
|
24
|
Xu Z, You W, Zhou Y, Chen W, Wang Y, Shan T. Cold-induced lipid dynamics and transcriptional programs in white adipose tissue. BMC Biol 2019; 17:74. [PMID: 31530289 PMCID: PMC6749700 DOI: 10.1186/s12915-019-0693-x] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 08/27/2019] [Indexed: 12/14/2022] Open
Abstract
Background In mammals, cold exposure induces browning of white adipose tissue (WAT) and alters WAT gene expression and lipid metabolism to boost adaptive thermogenesis and maintain body temperature. Understanding the lipidomic and transcriptomic profiles of WAT upon cold exposure provides insights into the adaptive changes associated with this process. Results Here, we applied mass spectrometry and RNA sequencing (RNA-seq) to provide a comprehensive resource for describing the lipidomic or transcriptome profiles in cold-induced inguinal WAT (iWAT). We showed that short-term (3-day) cold exposure induces browning of iWAT, increases energy expenditure, and results in loss of body weight and fat mass. Lipidomic analysis shows that short-term cold exposure leads to dramatic changes of the overall composition of lipid classes WAT. Notably, cold exposure induces significant changes in the acyl-chain composition of triacylglycerols (TAGs), as well as the levels of glycerophospholipids and sphingolipids in iWAT. RNA-seq and qPCR analysis suggests that short-term cold exposure alters the expression of genes and pathways involved in fatty acid elongation, and the synthesis of TAGs, sphingolipids, and glycerophospholipids. Furthermore, the cold-induced lipid dynamics and gene expression pathways in iWAT are contrary to those previously observed in metabolic syndrome, neurodegenerative disorders, and aging, suggesting beneficial effects of cold-induced WAT browning on health and lifespan. Conclusion We described the significant alterations in the composition of glyphospholipids, glycerolipids, and sphingolipids and expression of genes involved in thermogenesis, fatty acid elongation, and fatty acid metabolism during the response of iWAT to short-term cold exposure. We also found that some changes in the levels of specific lipid species happening after cold treatment of iWAT are negatively correlated to metabolic diseases, including obesity and T2D. Electronic supplementary material The online version of this article (10.1186/s12915-019-0693-x) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Ziye Xu
- College of Animal Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Wenjing You
- College of Animal Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Yanbing Zhou
- College of Animal Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Wentao Chen
- College of Animal Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Yizhen Wang
- College of Animal Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Tizhong Shan
- College of Animal Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China. .,The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.
| |
Collapse
|
25
|
Huang JW, Chen CJ, Yen CH, Chen YMA, Liu YP. Loss of Glycine N-Methyltransferase Associates with Angiopoietin-Like Protein 8 Expression in High Fat-Diet-Fed Mice. Int J Mol Sci 2019; 20:ijms20174223. [PMID: 31470507 PMCID: PMC6747252 DOI: 10.3390/ijms20174223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 08/27/2019] [Accepted: 08/27/2019] [Indexed: 12/16/2022] Open
Abstract
Imbalance of lipid metabolism is a main cause of metabolic syndrome leading to life-threatening metabolic diseases. Angiopoietin-like protein 8 (Angptl8) was recently identified as a liver and adipose tissue-released hormone that is one of the molecules involved in triglyceride metabolism. However, the regulatory mechanism of Angptl8 is largely unknown. A high fat diet (HFD)-fed mouse model, which showed high cholesterol, high triglyceride, and high insulin in the blood, revealed the upregulation of hepatic and plasma Angptl8 and the downregulation of hepatic glycine N-methyltransferase (GNMT). The inverse correlation of hepatic Angptl8 and GNMT expression in the livers of HFD-fed mice was also confirmed in a publicly available microarray dataset. The mechanistic study using primary hepatocytes showed that the Angptl8 expression could be induced by insulin treatment in a dose- and time-dependent manner. Inhibition of PI3K/Akt pathway by the specific inhibitors or the dominant-negative Akt blocked the insulin-induced Angptl8 expression. Moreover, knockout of GNMT promoted the Akt activation as well as the Angptl8 expression. These results suggested that GNMT might be involved in insulin-induced Angptl8 expression in HFD-mediated metabolic syndrome.
Collapse
Affiliation(s)
- Jian-Wei Huang
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Division of General Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Chao-Ju Chen
- Department of Laboratory Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Chia-Hung Yen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yi-Ming Arthur Chen
- Master Program of Clinical Pharmacogenomics and Pharmacoproteomics, College of Pharmacy, Taipei Medical University, Taipei 11031, Taiwan
| | - Yu-Peng Liu
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Graduate Institute of Clinical Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| |
Collapse
|
26
|
Preston KJ, Rom I, Vrakas C, Landesberg G, Etwebi Z, Muraoka S, Autieri M, Eguchi S, Scalia R. Postprandial activation of leukocyte-endothelium interaction by fatty acids in the visceral adipose tissue microcirculation. FASEB J 2019; 33:11993-12007. [PMID: 31393790 DOI: 10.1096/fj.201802637rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
High-fat diet (HFD)-induced obesity is associated with accumulation of inflammatory cells predominantly in visceral adipose depots [visceral adipose tissue (VAT)] rather than in subcutaneous ones [subcutaneous adipose tissue (SAT)]. The cellular and molecular mechanisms responsible for this phenotypic difference remain poorly understood. Controversy also exists on the overall impact that adipose tissue inflammation has on metabolic health in diet-induced obesity. The endothelium of the microcirculation regulates both the transport of lipids and the trafficking of leukocytes into organ tissue. We hypothesized that the VAT and SAT microcirculations respond differently to postprandial processing of dietary fat. We also tested whether inhibition of endothelial postprandial responses to high-fat meals (HFMs) preserves metabolic health in chronic obesity. We demonstrate that administration of a single HFM or ad libitum access to a HFD for 24 h quickly induces a transient P-selectin-dependent inflammatory phenotype in the VAT but not the SAT microcirculation of lean wild-type mice. Studies in P-selectin-deficient mice confirmed a mechanistic role for P-selectin in the initiation of leukocyte trafficking, myeloperoxidase accumulation, and acute reduction in adiponectin mRNA expression by HFMs. Despite reduced VAT inflammation in response to HFMs, P-selectin-deficient mice still developed glucose intolerance and insulin resistance when chronically fed an HFD. Our data uncover a novel nutrient-sensing role of the vascular endothelium that instigates postprandial VAT inflammation. They also demonstrate that inhibition of this transient postprandial inflammatory response fails to correct metabolic dysfunction in diet-induced obesity.-Preston, K. J., Rom, I., Vrakas, C., Landesberg, G., Etwebe, Z., Muraoka, S., Autieri, M., Eguchi, S., Scalia, R. Postprandial activation of leukocyte-endothelium interaction by fatty acids in the visceral adipose tissue microcirculation.
Collapse
Affiliation(s)
| | - Inna Rom
- Cardiovascular Research Center and
| | | | | | | | | | - Michael Autieri
- Department of Physiology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, USA
| | - Satoru Eguchi
- Department of Physiology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, USA
| | - Rosario Scalia
- Department of Physiology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, USA
| |
Collapse
|
27
|
Wang N, Tan HY, Li S, Wang D, Xu Y, Zhang C, Xia W, Che CM, Feng Y. SBP2 deficiency in adipose tissue macrophages drives insulin resistance in obesity. SCIENCE ADVANCES 2019; 5:eaav0198. [PMID: 31453320 PMCID: PMC6693917 DOI: 10.1126/sciadv.aav0198] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 07/10/2019] [Indexed: 05/24/2023]
Abstract
Proinflammatory activation and accumulation of adipose tissue macrophages (ATMs) are associated with increased risk of insulin resistance in obesity. Here, we described the previously unidentified role of selenocysteine insertion sequence-binding protein 2 (SBP2) in maintaining insulin sensitivity in obesity. SBP2 was suppressed in ATMs of diet-induced obese mice and was correlated with adipose tissue inflammation. Loss of SBP2 initiated metabolic activation of ATMs, inducing intracellular reactive oxygen species content and inflammasome, which subsequently promoted IL-1β-associated local proliferation and infiltration of proinflammatory macrophages. ATM-specific knockdown of SBP2 in obese mice promoted insulin resistance by increasing fat tissue inflammation and expansion. Reexpression of SBP2 improved insulin sensitivity. Last, an herbal formula that specifically induced SBP2 expression in ATMs can experimentally improve insulin sensitivity. Clinical observation revealed that it improved hyperglycemia in patients with diabetes. This study identified SBP2 in ATMs as a potential target in rescuing insulin resistance in obesity.
Collapse
Affiliation(s)
- Ning Wang
- School of Chinese Medicine, The University of Hong Kong, 1/F, 10 Sassoon Road, Pokfulam, Hong Kong S.A.R. 00000, P.R. China
| | - Hor-Yue Tan
- School of Chinese Medicine, The University of Hong Kong, 1/F, 10 Sassoon Road, Pokfulam, Hong Kong S.A.R. 00000, P.R. China
| | - Sha Li
- School of Chinese Medicine, The University of Hong Kong, 1/F, 10 Sassoon Road, Pokfulam, Hong Kong S.A.R. 00000, P.R. China
| | - Di Wang
- School of Life Science and State Engineering Laboratory of AIDS Vaccine, Jilin University, Changchun, Jilin Province 130012, P.R. China
| | - Yu Xu
- School of Chinese Medicine, The University of Hong Kong, 1/F, 10 Sassoon Road, Pokfulam, Hong Kong S.A.R. 00000, P.R. China
| | - Cheng Zhang
- School of Chinese Medicine, The University of Hong Kong, 1/F, 10 Sassoon Road, Pokfulam, Hong Kong S.A.R. 00000, P.R. China
| | - Wen Xia
- Joint Research Center for National and Local Miao Drug, Anshun, Guizhou Province 561000, P.R. China
| | - Chi-Ming Che
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P.R. China
| | - Yibin Feng
- School of Chinese Medicine, The University of Hong Kong, 1/F, 10 Sassoon Road, Pokfulam, Hong Kong S.A.R. 00000, P.R. China
| |
Collapse
|
28
|
The Preventive Effects of Greenshell Mussel ( Perna canaliculus) on Early-Stage Metabolic Osteoarthritis in Rats with Diet-Induced Obesity. Nutrients 2019; 11:nu11071601. [PMID: 31311115 PMCID: PMC6683089 DOI: 10.3390/nu11071601] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 07/09/2019] [Accepted: 07/11/2019] [Indexed: 12/23/2022] Open
Abstract
The prevalence of osteoarthritis (OA) is rising worldwide, with the most pronounced increase being in the category of metabolic-associated osteoarthritis (MetOA). This is predicted to worsen with the global rise in aging societies and obesity. To address this health burden, research is being conducted to identify foods that can reduce the incidence or severity of MetOA. Oil from the Greenshell mussel (Perna canaliculus) (GSM), a native New Zealand shellfish, has been successfully used to reduce OA symptoms. The current study assessed the effect of including flash-dried powder from whole GSM meat as part of a normal (control) versus high-fat/high-sugar (HFHS) diet for 13 weeks on the development of MetOA in rats. Rats fed a HFHS diet developed metabolic dysregulation and obesity with elevated plasma leptin and HbA1C concentrations. Visible damage to knee joint cartilage was minimal, but plasma levels of C telopeptide of type II collagen (CTX-II), a biomarker of cartilage degradation, were markedly higher in HFHS-fed rats compared to control-fed rats. However, rats fed the HFHS diet containing GSM had significantly reduced serum CTX-II. Inclusion of GSM in rats fed the control diet also lowered CTX-II. These findings suggest that dietary GSM can reduce the incidence or slow the progression of early MetOA.
Collapse
|
29
|
Abstract
Sleep deprivation has been reported to be a contributing factor for the epidemic of obesity. However, it is still largely unknown how sleep deprivation contributes to obesity at the transcriptional level. Here, we identified the significantly changed genes and pathways that may contribute to the sleep deprivation-induced obesity by analyzing two online datasets, including mouse obesity database and mouse sleep deprivation database. 298 differentially expressed genes (DEGs) were identified in high fat diet mice as compared to normal diet mice, while 541 DEGs were identified in mice with sleep deprivation when compared with mice with normal sleep. There are 12 common DEGs, such as Saa3 and Plin4, in both comparisons. And six of common DEGs were validated in other Gene Expression Omnibus (GEO) dataset. GO and KEGG pathway analyses revealed 19 common altered pathways, and most of them were metabolic processes, including steroid metabolic process, small molecule metabolic process and cholesterol metabolic process. Notably, we found that Aldoc, Cyp2b10, Nsdhl, Pcsk9, Saa3, Plin4 and Acss2 were involved in most of those altered pathways. Taken together, our study suggests that Saa3, Plin4, Aldoc, Cyp2b10, Nsdhl, Pcsk9 and Acss2 might be involved in sleep deprivation-induced obesity by regulating metabolic processes.
Collapse
Affiliation(s)
- YI WEI
- Nanjing Forest Police College, Nanjing 210023, P. R. China
| |
Collapse
|
30
|
Wu Z, Tan J, Chi Y, Zhang F, Xu J, Song Y, Cong X, Wu N, Liu Y. Mesenteric adipose tissue contributes to intestinal barrier integrity and protects against nonalcoholic fatty liver disease in mice. Am J Physiol Gastrointest Liver Physiol 2018; 315:G659-G670. [PMID: 29902065 DOI: 10.1152/ajpgi.00079.2018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Visceral adipose tissue (VAT) is related to nonalcoholic fatty liver disease (NAFLD). However, the role of mesenteric adipose tissue (MAT), part of the VAT, in NAFLD is unclear. In the present study, we monitored the liver and four depots of the VAT in high-fat diet (HFD)-feeding mice at multiple time points (4, 8, and 12 wk). The MAT had become inflamed by the eighth week of HFD feeding, earlier than other depots of VAT. Furthermore, MAT removal after 8 wk of HFD resulted in more severe steatosis and more foci of inflammation infiltration, as well as higher NAFLD activity scores. Consistent with these findings, the mRNA expression of proinflammatory cytokines and lipid anabolism genes was increased in the livers of inflamed MAT-removal mice. MAT removal also injured the intestinal barrier and promoted intestinal inflammation. The bacterial load translocated to the liver and circulating levels of lipopolysaccharide were also evaluated in inflamed MAT-removal mice. In a coculture experiment involving adipocytes and intestinal epithelial cells, mRNA expression of zonula occludens-1 (ZO-1), and occludin in CT-26 cells was upregulated and permeability of monolayer Caco-2 cells was elevated under stimulation from adipocytes or inflamed adipocytes. Taken together, these results demonstrated that MAT removal damaged the intestinal barrier and aggravated NAFLD and that MAT inflammation may be a compensatory response to protect the liver by maintaining the intestinal barrier. NEW & NOTEWORTHY The mesenteric adipose tissue (MAT) lies between the gut and liver and plays a critical role in hepatic metabolic diseases. In the present study, we found that the MAT was prone to inflammation in high-fat diet-fed mice. Removal of the inflamed MAT resulted in more hepatic inflammation, lipid accumulation, and decreased glucose tolerance. Furthermore, we showed that the MAT contributed to intestinal barrier integrity, thus clarifying why MAT removal aggravated nonalcoholic fatty liver disease.
Collapse
Affiliation(s)
- Zhe Wu
- Department of Gastroenterology, Peking University People's Hospital , Beijing , People's Republic of China.,Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital , Beijing , People's Republic of China
| | - Jiang Tan
- Department of Gastroenterology, Peking University People's Hospital , Beijing , People's Republic of China.,Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital , Beijing , People's Republic of China
| | - Yujing Chi
- Central Laboratory & Institute of Clinical Molecular Biology Peking University People's Hospital , Beijing , People's Republic of China
| | - Feng Zhang
- Department of Gastroenterology, Peking University People's Hospital , Beijing , People's Republic of China.,Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital , Beijing , People's Republic of China
| | - Jun Xu
- Department of Gastroenterology, Peking University People's Hospital , Beijing , People's Republic of China.,Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital , Beijing , People's Republic of China
| | - Yang Song
- Department of Gastroenterology, Peking University People's Hospital , Beijing , People's Republic of China.,Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital , Beijing , People's Republic of China
| | - Xu Cong
- Hepatology Institute, Peking University People's Hospital, Beijing, People's Republic of China
| | - Na Wu
- Central Laboratory & Institute of Clinical Molecular Biology Peking University People's Hospital , Beijing , People's Republic of China
| | - Yulan Liu
- Department of Gastroenterology, Peking University People's Hospital , Beijing , People's Republic of China.,Clinical Center of Immune-Mediated Digestive Diseases, Peking University People's Hospital , Beijing , People's Republic of China
| |
Collapse
|
31
|
Liu BX, Sun W, Kong XQ. Perirenal Fat: A Unique Fat Pad and Potential Target for Cardiovascular Disease. Angiology 2018; 70:584-593. [PMID: 30301366 DOI: 10.1177/0003319718799967] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Although visceral obesity is recognized as a risk factor for cardiovascular diseases (CVDs), the efficacy of omental fat removal in CVD treatment is still controversial. There is a need to identify other visceral fat depots for CVD management. This review aims to provide a summary on perirenal fat as an important risk factor for CVD. Studies on epidemiology, anatomy, and function of perirenal fat were reviewed. Observational studies in humans suggest that excessive perirenal fat increases the risk of hypertension and coronary heart disease. Anatomy studies prove that perirenal fat is unique compared to other connective tissues in that it is well vascularized, innervated, and drains into the lymphatic system. Other special morphological features include a complete fascia border, sympathetic-independent development of architecture, and proximity to the kidneys. Based on these anatomical features, perirenal fat regulates the cardiovascular system presumably via neural reflex, adipokine secretion, and fat-kidney interaction. These new insights suggest that perirenal fat may constitute a promising target for CVD management.
Collapse
Affiliation(s)
- Bo-Xun Liu
- 1 Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Wei Sun
- 1 Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| | - Xiang-Qing Kong
- 1 Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
| |
Collapse
|
32
|
Luteolin Targets the Toll-Like Receptor Signaling Pathway in Prevention of Hepatic and Adipocyte Fibrosis and Insulin Resistance in Diet-Induced Obese Mice. Nutrients 2018; 10:nu10101415. [PMID: 30282902 PMCID: PMC6213163 DOI: 10.3390/nu10101415] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 09/22/2018] [Accepted: 09/24/2018] [Indexed: 12/18/2022] Open
Abstract
This study was to investigate the protective role of luteolin on inflammation-mediated metabolic diseases, focusing on the role of luteolin in the modulation of the Toll-like receptor (TLR) signaling pathway. C57BL/6J mice were fed a normal, high-fat, or high-fat + 0.005% (w/w) luteolin diet for 16 weeks. Luteolin improved chronic low-grade inflammation by modulating the TLR signaling pathway, resulting in reduced pro-inflammatory cytokines and macrophage accumulation. A positive relationship was detected between gene expressions of Tlr5, Map2k7, Mapk12, Mapk13, and Mapk9 and lipogenesis in epididymal white adipose tissue (eWAT) of luteolin-treated mice, which was linked to attenuation of hepatic lipotoxicity by increasing free fatty acid (FFA) flux to the WAT. Luteolin prevented fibrosis by decreasing extracellular matrix accumulation and cathepsin gene expressions, while enhancing the hepatic antioxidant system. Emr1 and Ccl7, important markers inducing low-grade inflammation, were affected by advanced age and greater body weight, which were normalized by luteolin treatment. Luteolin improved insulin resistance by normalizing pancreatic islet dysfunction and differentially modulating the plasma glucagon-like peptide-1 and gastric inhibitory polypeptide levels. Our results suggest that luteolin ameliorates diet-induced obesity and its comorbidities. Overall, this study provides novel insights into the effect of luteolin on the links among adiposopathy, insulin resistance, hepatic steatosis, and fibrosis.
Collapse
|
33
|
Lane-Cordova A. Editorial Commentary: The obesity paradox in cardiovascular disease: Deeper phenotyping to get to the heart of the matter. Trends Cardiovasc Med 2018; 29:226-227. [PMID: 30220638 DOI: 10.1016/j.tcm.2018.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 10/28/2022]
Affiliation(s)
- Abbi Lane-Cordova
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina at Columbia, Columbia, SC 29201, USA.
| |
Collapse
|
34
|
Figueiredo VP, Junior ESL, Lopes LR, Simões NF, Penitente AR, Bearzoti E, Vieira PMDA, Schulz R, Talvani A. High fat diet modulates inflammatory parameters in the heart and liver during acute Trypanosoma cruzi infection. Int Immunopharmacol 2018; 64:192-200. [PMID: 30195817 DOI: 10.1016/j.intimp.2018.08.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 08/13/2018] [Accepted: 08/24/2018] [Indexed: 11/27/2022]
Abstract
The high fat diet (HFD) can trigger metabolic and cardiovascular diseases. Trypanosoma cruzi infection induces progressive inflammatory manifestations capable to affect the structure and the function of important organs such as the heart and liver. Here we aimed to investigate the effects of a HFD on the immune response and matrix metalloproteinase (MMP) activities during acute infection with the T. cruzi strain VL-10. The VL-10 strain has cardiac tropism and causes myocarditis in mice. Male C57BL/6 mice were treated with either: (i) regular diet (Reg) or (ii) HFD for 8 weeks, after which mice in each group were infected with T. cruzi. Mice were euthanized on day 30 after infection, and the liver and heart were subjected to histology and zymography to determine MMP-2 activities and plasma levels of IL-10, TNF, CCL2, and CCL5. T. cruzi-infected HFD animals had higher parasitemia, LDL and total cholesterol levels. Regardless of diet, plasma levels of all inflammatory mediators and cardiac MMP-2 activity were elevated in infected mice in contrast with the low plasma levels of leptin. HFD animals presented micro- and macrovesicular hepatic steatosis, while cardiac leukocyte infiltration was mainly detected in T. cruzi-infected mice. Our findings suggested that a HFD promotes higher circulating T. cruzi load and cardiac and liver immunopathogenesis in an experimental model using the VL-10 strain of the T. cruzi.
Collapse
Affiliation(s)
- Vivian Paulino Figueiredo
- Department of Biological Sciences, Ouro Preto, Minas Gerais, Brazil; Post graduation program of Biological Sciences/NUPEB, Ouro Preto, Minas Gerais, Brazil
| | | | - Laís Roquete Lopes
- Department of Biological Sciences, Ouro Preto, Minas Gerais, Brazil; Post graduation program of Biological Sciences/NUPEB, Ouro Preto, Minas Gerais, Brazil; Post graduation program in Health and Nutrition, Ouro Preto, Minas Gerais, Brazil
| | - Natalia Figueirôa Simões
- Department of Biological Sciences, Ouro Preto, Minas Gerais, Brazil; Post graduation program in Health and Nutrition, Ouro Preto, Minas Gerais, Brazil
| | | | - Eduardo Bearzoti
- Department of Statistics, Federal University of Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - Paula Melo de Abreu Vieira
- Department of Biological Sciences, Ouro Preto, Minas Gerais, Brazil; Post graduation program of Biological Sciences/NUPEB, Ouro Preto, Minas Gerais, Brazil
| | - Richard Schulz
- Department of Pediatrics, Department of Pharmacology, University of Alberta, Edmonton, Alberta, Canada
| | - André Talvani
- Department of Biological Sciences, Ouro Preto, Minas Gerais, Brazil; Post graduation program of Biological Sciences/NUPEB, Ouro Preto, Minas Gerais, Brazil; Post graduation program in Health and Nutrition, Ouro Preto, Minas Gerais, Brazil; Post graduation program in Ecology of Tropical Biomes/ICEB, Ouro Preto, Minas Gerais, Brazil.
| |
Collapse
|
35
|
Tsuchida T, Lee YA, Fujiwara N, Ybanez M, Allen B, Martins S, Fiel MI, Goossens N, Chou HI, Hoshida Y, Friedman SL. A simple diet- and chemical-induced murine NASH model with rapid progression of steatohepatitis, fibrosis and liver cancer. J Hepatol 2018; 69:385-395. [PMID: 29572095 PMCID: PMC6054570 DOI: 10.1016/j.jhep.2018.03.011] [Citation(s) in RCA: 314] [Impact Index Per Article: 52.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 02/28/2018] [Accepted: 03/09/2018] [Indexed: 02/09/2023]
Abstract
BACKGROUND AND AIMS Although the majority of patients with non-alcoholic fatty liver disease (NAFLD) have only steatosis without progression, a sizeable fraction develop non-alcoholic steatohepatitis (NASH), which can lead to cirrhosis and hepatocellular carcinoma (HCC). Many established diet-induced mouse models for NASH require 24-52 weeks, which makes testing for drug response costly and time consuming. METHODS We have sought to establish a murine NASH model with rapid progression of extensive fibrosis and HCC by using a western diet (WD), which is high-fat, high-fructose and high-cholesterol, combined with low weekly dose of intraperitoneal carbon tetrachloride (CCl4), which serves as an accelerator. RESULTS C57BL/6J mice were fed a normal chow diet ± CCl4 or WD ± CCl4 for 12 and 24 weeks. Addition of CCl4 exacerbated histological features of NASH, fibrosis, and tumor development induced by WD, which resulted in stage 3 fibrosis at 12 weeks and HCC development at 24 weeks. Furthermore, whole liver transcriptomic analysis indicated that dysregulated molecular pathways in WD/CCl4 mice and immunologic features were similar to those of human NASH. CONCLUSIONS Our mouse NASH model exhibits rapid progression of advanced fibrosis and HCC, and mimics histological, immunological and transcriptomic features of human NASH, suggesting that it will be a useful experimental tool for preclinical drug testing. LAY SUMMARY A carefully characterized model has been developed in mice that recapitulates the progressive stages of human fatty liver disease, from simple steatosis, to inflammation, fibrosis and cancer. The functional pathways of gene expression and immune abnormalities in this model closely resemble human disease. The ease and reproducibility of this model make it ideal to study disease pathogenesis and test new treatments.
Collapse
Affiliation(s)
- Takuma Tsuchida
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA; Research Division, Mitsubishi Tanabe Pharma Corporation, Saitama, Japan
| | - Youngmin A Lee
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Naoto Fujiwara
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Maria Ybanez
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Brittany Allen
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Sebastiao Martins
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA; Departamento de Patologia, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, SP, Brazil
| | - M Isabel Fiel
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Nicolas Goossens
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Hsin-I Chou
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Yujin Hoshida
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Scott L Friedman
- Division of Liver Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, USA.
| |
Collapse
|
36
|
Garcia IJP, Cézar JS, Lemos BS, Silva LN, Ribeiro RIMDA, Santana CC, Grillo LAM, Pinto FCH, Buzelle SL, Cortes VF, Santos HDL, Santos MESMD, Barbosa LA. Effects of high fat diet on kidney lipid content and the Na,K-ATPase activity. BRAZ J PHARM SCI 2018. [DOI: 10.1590/s2175-97902018000117165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
|
37
|
Collins KH, Herzog W, MacDonald GZ, Reimer RA, Rios JL, Smith IC, Zernicke RF, Hart DA. Obesity, Metabolic Syndrome, and Musculoskeletal Disease: Common Inflammatory Pathways Suggest a Central Role for Loss of Muscle Integrity. Front Physiol 2018; 9:112. [PMID: 29527173 PMCID: PMC5829464 DOI: 10.3389/fphys.2018.00112] [Citation(s) in RCA: 153] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/05/2018] [Indexed: 01/14/2023] Open
Abstract
Inflammation can arise in response to a variety of stimuli, including infectious agents, tissue injury, autoimmune diseases, and obesity. Some of these responses are acute and resolve, while others become chronic and exert a sustained impact on the host, systemically, or locally. Obesity is now recognized as a chronic low-grade, systemic inflammatory state that predisposes to other chronic conditions including metabolic syndrome (MetS). Although obesity has received considerable attention regarding its pathophysiological link to chronic cardiovascular conditions and type 2 diabetes, the musculoskeletal (MSK) complications (i.e., muscle, bone, tendon, and joints) that result from obesity-associated metabolic disturbances are less frequently interrogated. As musculoskeletal diseases can lead to the worsening of MetS, this underscores the imminent need to understand the cause and effect relations between the two, and the convergence between inflammatory pathways that contribute to MSK damage. Muscle mass is a key predictor of longevity in older adults, and obesity-induced sarcopenia is a significant risk factor for adverse health outcomes. Muscle is highly plastic, undergoes regular remodeling, and is responsible for the majority of total body glucose utilization, which when impaired leads to insulin resistance. Furthermore, impaired muscle integrity, defined as persistent muscle loss, intramuscular lipid accumulation, or connective tissue deposition, is a hallmark of metabolic dysfunction. In fact, many common inflammatory pathways have been implicated in the pathogenesis of the interrelated tissues of the musculoskeletal system (e.g., tendinopathy, osteoporosis, and osteoarthritis). Despite these similarities, these diseases are rarely evaluated in a comprehensive manner. The aim of this review is to summarize the common pathways that lead to musculoskeletal damage and disease that result from and contribute to MetS. We propose the overarching hypothesis that there is a central role for muscle damage with chronic exposure to an obesity-inducing diet. The inflammatory consequence of diet and muscle dysregulation can result in dysregulated tissue repair and an imbalance toward negative adaptation, resulting in regulatory failure and other musculoskeletal tissue damage. The commonalities support the conclusion that musculoskeletal pathology with MetS should be evaluated in a comprehensive and integrated manner to understand risk for other MSK-related conditions. Implications for conservative management strategies to regulate MetS are discussed, as are future research opportunities.
Collapse
Affiliation(s)
- Kelsey H. Collins
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Walter Herzog
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Graham Z. MacDonald
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Raylene A. Reimer
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, AB, Canada
| | - Jaqueline L. Rios
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
- CAPES Foundation, Brasilia, Brazil
| | - Ian C. Smith
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Ronald F. Zernicke
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Departments of Orthopaedic Surgery and Biomedical Engineering, School of Kinesiology, University of Michigan, Ann Arbor, MI, United States
- Department of Surgery, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - David A. Hart
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
- Department of Family Practice, The Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC, Canada
- Alberta Health Services Bone and Joint Health Strategic Clinical Network, Calgary, AB, Canada
| |
Collapse
|
38
|
Baik M, Kang HJ, Park SJ, Na SW, Piao M, Kim SY, Fassah DM, Moon YS. TRIENNIAL GROWTH AND DEVELOPMENT SYMPOSIUM: Molecular mechanisms related to bovine intramuscular fat deposition in the longissimus muscle. J Anim Sci 2017; 95:2284-2303. [PMID: 28727015 DOI: 10.2527/jas.2016.1160] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The intramuscular fat (IMF) content of the LM, also known as marbling, is particularly important in determining the price of beef in Korea, Japan, and the United States. Deposition of IMF is influenced by both genetic (e.g., breed, gender, and genotype) and nongenetic factors (e.g., castration, nutrition, stressors, animal weight, and age). Castration of bulls markedly increases deposition of IMF, resulting in improved beef quality. Here, we present a comparative gene expression approach between bulls and steers. Transcriptomic and proteomic studies have demonstrated that the combined effects of increases in lipogenesis, fatty acid uptake, and fatty acid esterification and decreased lipolysis are associated with increased IMF deposition in the LM. Several peripheral tissues (LM, adipose tissues, and the liver) are involved in lipid metabolism. Therefore, understanding the significance of the tissue network in lipid metabolism is important. Here, we demonstrate that lipid metabolism in LM tissues is crucial for IMF deposition, whereas lipid metabolism in the liver plays only a minor role. Metabolism of body fat and IMF deposition in bovine species has similarities with these processes in metabolic diseases, such as obesity in humans and rodents. Extensive studies on metabolic diseases using epigenome modification (DNA methylation, histone modification, and microRNA), microbial metagenomics, and metabolomics have been performed in humans and rodents, and new findings have been reported using these technologies. The importance of applying "omics" fields (epigenomics, metagenomics, and metabolomics) to the study of IMF deposition in cattle is described. New information on the molecular mechanisms of IMF deposition may be used to design nutritional or genetic methods to manipulate IMF deposition and to modify fatty acid composition in beef cattle. Applying nutrigenomics could maximize the expression of genetic potential of economically important traits (e.g., marbling) in animals.
Collapse
|
39
|
Zhang SB, Yang S, Zhang Z, Zhang A, Zhang M, Yin L, Casey-Sawicki K, Swarts S, Vidyasagar S, Zhang L, Okunieff P. Thoracic gamma irradiation-induced obesity in C57BL/6 female mice. Int J Radiat Biol 2017; 93:1334-1342. [DOI: 10.1080/09553002.2017.1385871] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Steven B. Zhang
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Shanmin Yang
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Zhenhuan Zhang
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Amy Zhang
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Mei Zhang
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Liangjie Yin
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Katherine Casey-Sawicki
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Steven Swarts
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Sadasivan Vidyasagar
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Lurong Zhang
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| | - Paul Okunieff
- Department of Radiation Oncology, University of Florida Health Cancer Center, Gainesville, FL, USA
| |
Collapse
|
40
|
Lettieri-Barbato D, D'Angelo F, Sciarretta F, Tatulli G, Tortolici F, Ciriolo MR, Aquilano K. Maternal high calorie diet induces mitochondrial dysfunction and senescence phenotype in subcutaneous fat of newborn mice. Oncotarget 2017; 8:83407-83418. [PMID: 29137352 PMCID: PMC5663524 DOI: 10.18632/oncotarget.19948] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 07/26/2017] [Indexed: 12/25/2022] Open
Abstract
Mitochondrial dysfunction, inflammation and senescence-like features are observed in adipose depots in aging and obesity. Herein, we evaluated how maternal high calorie diet (HCD) may impact on subcutaneous adipose tissue (sAT) of the newborn mice. Adult C57BL/6J mice were randomly divided in three groups: normal calorie diet (NCD), HCD and HCD supplemented with niacin 8 weeks before mating. Mothers and pups were then sacrificed and metabolic and molecular analyses were carried out on sAT. HCD induced mitochondria dysfunction in mothers without inflammation and senescence, whereas in pups we also revealed the occurrence of senescent phenotype. The mitochondrial dysfunction-associated senescence in pups was accompanied by a drop in NAD+/NADH ratio and alteration in the NAD+-dependent enzymes PARP1 and SIRT1. Importantly, maternal dietary supplementation with niacin during gestation and lactation restrained NAD+/NADH decrease imposed by HCD limiting inflammatory cytokine production and senescence phenotype in newborn sAT. Given the fundamental role of sAT in buffering nutrient overload and avoiding pathogenic ectopic fat accumulation, we suggest that NAD+ boosting strategies during maternal HCD could be helpful in limiting sAT dysfunction in newborn.
Collapse
Affiliation(s)
- Daniele Lettieri-Barbato
- Department of Biology, University of Rome Tor Vergata, Rome, Italy.,IRCCS San Raffaele Pisana, Rome, Italy
| | - Fabiana D'Angelo
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | | | | | - Flavia Tortolici
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Maria Rosa Ciriolo
- Department of Biology, University of Rome Tor Vergata, Rome, Italy.,IRCCS San Raffaele Pisana, Rome, Italy
| | - Katia Aquilano
- Department of Biology, University of Rome Tor Vergata, Rome, Italy.,IRCCS San Raffaele Pisana, Rome, Italy
| |
Collapse
|
41
|
Zhao Y, Forst CV, Sayegh CE, Wang IM, Yang X, Zhang B. Molecular and genetic inflammation networks in major human diseases. MOLECULAR BIOSYSTEMS 2017; 12:2318-41. [PMID: 27303926 DOI: 10.1039/c6mb00240d] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
It has been well-recognized that inflammation alongside tissue repair and damage maintaining tissue homeostasis determines the initiation and progression of complex diseases. Albeit with the accomplishment of having captured the most critical inflammation-involved molecules, genetic susceptibilities, epigenetic factors, and environmental factors, our schemata on the role of inflammation in complex diseases remain largely patchy, in part due to the success of reductionism in terms of research methodology per se. Omics data alongside the advances in data integration technologies have enabled reconstruction of molecular and genetic inflammation networks which shed light on the underlying pathophysiology of complex diseases or clinical conditions. Given the proven beneficial role of anti-inflammation in coronary heart disease as well as other complex diseases and immunotherapy as a revolutionary transition in oncology, it becomes timely to review our current understanding of the molecular and genetic inflammation networks underlying major human diseases. In this review, we first briefly discuss the complexity of infectious diseases and then highlight recently uncovered molecular and genetic inflammation networks in other major human diseases including obesity, type II diabetes, coronary heart disease, late onset Alzheimer's disease, Parkinson's disease, and sporadic cancer. The commonality and specificity of these molecular networks are addressed in the context of genetics based on genome-wide association study (GWAS). The double-sword role of inflammation, such as how the aberrant type 1 and/or type 2 immunity leads to chronic and severe clinical conditions, remains open in terms of the inflammasome and the core inflammatome network features. Increasingly available large Omics and clinical data in tandem with systems biology approaches have offered an exciting yet challenging opportunity toward reconstruction of more comprehensive and dynamic molecular and genetic inflammation networks, which hold great promise in transiting network snapshots to video-style multi-scale interplays of disease mechanisms, in turn leading to effective clinical intervention.
Collapse
Affiliation(s)
- Yongzhong Zhao
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA. and Institute of Genomics and Multiscale Biology, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA
| | - Christian V Forst
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA. and Institute of Genomics and Multiscale Biology, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA
| | - Camil E Sayegh
- Vertex Pharmaceuticals (Canada) Incorporated, 275 Armand-Frappier, Laval, Quebec H7V 4A7, Canada
| | - I-Ming Wang
- Informatics and Analysis, Merck Research Laboratories, Merck & Co., Inc., 770 Sumneytown Pike, West Point, PA 19486, USA.
| | - Xia Yang
- Department of Integrative Biology and Physiology, University of California, Los Angeles, CA 90025, USA.
| | - Bin Zhang
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA. and Institute of Genomics and Multiscale Biology, Mount Sinai School of Medicine, 1425 Madison Avenue, NY 10029, USA
| |
Collapse
|
42
|
Antonopoulos AS, Tousoulis D. The molecular mechanisms of obesity paradox. Cardiovasc Res 2017; 113:1074-1086. [DOI: 10.1093/cvr/cvx106] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 05/24/2017] [Indexed: 11/14/2022] Open
|
43
|
Plubell DL, Wilmarth PA, Zhao Y, Fenton AM, Minnier J, Reddy AP, Klimek J, Yang X, David LL, Pamir N. Extended Multiplexing of Tandem Mass Tags (TMT) Labeling Reveals Age and High Fat Diet Specific Proteome Changes in Mouse Epididymal Adipose Tissue. Mol Cell Proteomics 2017; 16:873-890. [PMID: 28325852 DOI: 10.1074/mcp.m116.065524] [Citation(s) in RCA: 203] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 02/28/2017] [Indexed: 01/17/2023] Open
Abstract
The lack of high-throughput methods to analyze the adipose tissue protein composition limits our understanding of the protein networks responsible for age and diet related metabolic response. We have developed an approach using multiple-dimension liquid chromatography tandem mass spectrometry and extended multiplexing (24 biological samples) with tandem mass tags (TMT) labeling to analyze proteomes of epididymal adipose tissues isolated from mice fed either low or high fat diet for a short or a long-term, and from mice that aged on low versus high fat diets. The peripheral metabolic health (as measured by body weight, adiposity, plasma fasting glucose, insulin, triglycerides, total cholesterol levels, and glucose and insulin tolerance tests) deteriorated with diet and advancing age, with long-term high fat diet exposure being the worst. In response to short-term high fat diet, 43 proteins representing lipid metabolism (e.g. AACS, ACOX1, ACLY) and red-ox pathways (e.g. CPD2, CYP2E, SOD3) were significantly altered (FDR < 10%). Long-term high fat diet significantly altered 55 proteins associated with immune response (e.g. IGTB2, IFIT3, LGALS1) and rennin angiotensin system (e.g. ENPEP, CMA1, CPA3, ANPEP). Age-related changes on low fat diet significantly altered only 18 proteins representing mainly urea cycle (e.g. OTC, ARG1, CPS1), and amino acid biosynthesis (e.g. GMT, AKR1C6). Surprisingly, high fat diet driven age-related changes culminated with alterations in 155 proteins involving primarily the urea cycle (e.g. ARG1, CPS1), immune response/complement activation (e.g. C3, C4b, C8, C9, CFB, CFH, FGA), extracellular remodeling (e.g. EFEMP1, FBN1, FBN2, LTBP4, FERMT2, ECM1, EMILIN2, ITIH3) and apoptosis (e.g. YAP1, HIP1, NDRG1, PRKCD, MUL1) pathways. Using our adipose tissue tailored approach we have identified both age-related and high fat diet specific proteomic signatures highlighting a pronounced involvement of arginine metabolism in response to advancing age, and branched chain amino acid metabolism in early response to high fat feeding. Data are available via ProteomeXchange with identifier PXD005953.
Collapse
Affiliation(s)
- Deanna L Plubell
- From the ‡Department of Medicine, Knight Cardiovascular Institute, Oregon Health & Sciences University, Portland, Oregon
| | - Phillip A Wilmarth
- §Proteomics Shared Resources, Oregon Health & Sciences University, Portland, Oregon
| | - Yuqi Zhao
- ¶Department of Integrative Biology and Physiology, University of California, Los Angeles, California
| | - Alexandra M Fenton
- From the ‡Department of Medicine, Knight Cardiovascular Institute, Oregon Health & Sciences University, Portland, Oregon
| | - Jessica Minnier
- From the ‡Department of Medicine, Knight Cardiovascular Institute, Oregon Health & Sciences University, Portland, Oregon
| | - Ashok P Reddy
- §Proteomics Shared Resources, Oregon Health & Sciences University, Portland, Oregon
| | - John Klimek
- §Proteomics Shared Resources, Oregon Health & Sciences University, Portland, Oregon
| | - Xia Yang
- ¶Department of Integrative Biology and Physiology, University of California, Los Angeles, California
| | - Larry L David
- §Proteomics Shared Resources, Oregon Health & Sciences University, Portland, Oregon
| | - Nathalie Pamir
- From the ‡Department of Medicine, Knight Cardiovascular Institute, Oregon Health & Sciences University, Portland, Oregon;
| |
Collapse
|
44
|
Beaumont M, Andriamihaja M, Armand L, Grauso M, Jaffrézic F, Laloë D, Moroldo M, Davila AM, Tomé D, Blachier F, Lan A. Epithelial response to a high-protein diet in rat colon. BMC Genomics 2017; 18:116. [PMID: 28137254 PMCID: PMC5282643 DOI: 10.1186/s12864-017-3514-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 01/25/2017] [Indexed: 01/03/2023] Open
Abstract
Background High-protein diets (HPD) alter the large intestine microbiota composition in association with a metabolic shift towards protein degradation. Some amino acid-derived metabolites produced by the colon bacteria are beneficial for the mucosa while others are deleterious at high concentrations. The aim of the present work was to define the colonic epithelial response to an HPD. Transcriptome profiling was performed on colonocytes of rats fed an HPD or an isocaloric normal-protein diet (NPD) for 2 weeks. Results The HPD downregulated the expression of genes notably implicated in pathways related to cellular metabolism, NF-κB signaling, DNA repair, glutathione metabolism and cellular adhesion in colonocytes. In contrast, the HPD upregulated the expression of genes related to cell proliferation and chemical barrier function. These changes at the mRNA level in colonocytes were not associated with detrimental effects of the HPD on DNA integrity (comet assay), epithelium renewal (quantification of proliferation and apoptosis markers by immunohistochemistry and western blot) and colonic barrier integrity (Ussing chamber experiments). Conclusion The modifications of the luminal environment after an HPD were associated with maintenance of the colonic homeostasis that might be the result of adaptive processes in the epithelium related to the observed transcriptional regulations. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3514-z) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Martin Beaumont
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France
| | - Mireille Andriamihaja
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France
| | - Lucie Armand
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France
| | - Marta Grauso
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France
| | - Florence Jaffrézic
- UMR1313 Génétique Animale et Biologie Intégrative, INRA, 78350, Jouy-en-Josas, France
| | - Denis Laloë
- UMR1313 Génétique Animale et Biologie Intégrative, INRA, 78350, Jouy-en-Josas, France
| | | | - Anne-Marie Davila
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France
| | - Daniel Tomé
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France
| | - François Blachier
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France
| | - Annaïg Lan
- UMR Physiologie de la Nutrition et du Comportement Alimentaire, AgroParisTech, INRA, Université Paris-Saclay, 16 rue Claude Bernard, 75005, Paris, France.
| |
Collapse
|
45
|
Petrangeli E, Coroniti G, Brini AT, de Girolamo L, Stanco D, Niada S, Silecchia G, Morgante E, Lubrano C, Russo MA, Salvatori L. Hypoxia Promotes the Inflammatory Response and Stemness Features in Visceral Fat Stem Cells From Obese Subjects. J Cell Physiol 2016. [PMID: 26224080 DOI: 10.1002/jcp.25113] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Low-grade chronic inflammation is a salient feature of obesity and many associated disorders. This condition frequently occurs in central obesity and is connected to alterations of the visceral adipose tissue (AT) microenvironment. Understanding how obesity is related to inflammation may allow the development of therapeutics aimed at improving metabolic parameters in obese patients. To achieve this aim, we compared the features of two subpopulations of adipose-derived stem cells (ASC) isolated from both subcutaneous and visceral AT of obese patients with the features of two subpopulations of ASC from the same isolation sites of non-obese individuals. In particular, the behavior of ASC of obese versus non-obese subjects during hypoxia, which occurs in obese AT and is an inducer of the inflammatory response, was evaluated. Obesity deeply influenced ASC from visceral AT (obV-ASC); these cells appeared to exhibit clearly distinguishable morphology and ultrastructure as well as reduced proliferation, clonogenicity and expression of stemness, differentiation and inflammation-related genes. These cells also exhibited a deregulated response to hypoxia, which induced strong tissue-specific NF-kB activation and an NF-kB-mediated increase in inflammatory and fibrogenic responses. Moreover, obV-ASC, which showed a less stem-like phenotype, recovered stemness features after hypoxia. Our findings demonstrated the peculiar behavior of obV-ASC, their influence on the obese visceral AT microenvironment and the therapeutic potential of NF-kB inhibitors. These novel findings suggest that the deregulated hyper-responsiveness to hypoxic stimulus of ASC from visceral AT of obese subjects may contribute via paracrine mechanisms to low-grade chronic inflammation, which has been implicated in obesity-related morbidity.
Collapse
Affiliation(s)
- Elisa Petrangeli
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy.,CNR, Institute of Molecular Biology and Pathology, Rome, Italy
| | - Giuseppe Coroniti
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Anna T Brini
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy.,IRCCS Galeazzi Orthopaedic Institute, Milan, Italy
| | | | | | - Stefania Niada
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
| | - Gianfranco Silecchia
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina, Italy
| | - Emanuela Morgante
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | - Carla Lubrano
- Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy
| | | | - Luisa Salvatori
- CNR, Institute of Molecular Biology and Pathology, Rome, Italy
| |
Collapse
|
46
|
Gondret F, Vincent A, Houée-Bigot M, Siegel A, Lagarrigue S, Louveau I, Causeur D. Molecular alterations induced by a high-fat high-fiber diet in porcine adipose tissues: variations according to the anatomical fat location. BMC Genomics 2016; 17:120. [PMID: 26892011 PMCID: PMC4758018 DOI: 10.1186/s12864-016-2438-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 02/05/2016] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Changing the energy and nutrient source for growing animals may be an effective way of limiting adipose tissue expansion, a response which may depend on the genetic background of the animals. This study aims to describe the transcriptional modulations present in the adipose tissues of two pig lines divergently selected for residual feed intake which were either fed a high-fat high-fiber (HF) diet or an isocaloric low-fat high-starch diet (LF). RESULTS Transcriptomic analysis using a porcine microarray was performed on 48 pigs (n = 12 per diet and per line) in both perirenal (PRAT) and subcutaneous (SCAT) adipose tissues. There was no interaction between diet and line on either adiposity or transcriptional profiles, so that the diet effect was inferred independently of the line. Irrespective of line, the relative weights of the two fat depots were lower in HF pigs than in LF pigs after 58 days on dietary treatment. In the two adipose tissues, the most apparent effect of the HF diet was the down-regulation of several genes associated with the ubiquitin-proteasome system, which therefore may be associated with dietary-induced modulations in genes acting in apoptotic and cell cycle regulatory pathways. Genes involved in glucose metabolic processes were also down-regulated by the HF diet, with no significant variation or decreased expression of important lipid-related genes such as the low-density lipoprotein receptor and leptin in the two fat pads. The master regulators of glucose and fatty acid homeostasis SREBF1 and MLXIPL, and peroxisome proliferator-activated receptor (PPAR)δ and its heterodimeric partner RXRA were down-regulated by the HF diet. PPARγ which has pleiotropic functions including lipid metabolism and adipocyte differentiation, was however up-regulated by this diet in PRAT and SCAT. Dietary-related modulations in the expression of genes associated with immunity and inflammation were mainly revealed in PRAT. CONCLUSION A high-fat high-fiber diet depressed glucose and lipid anabolic molecular pathways, thus counteracting adipose tissue expansion. Interaction effects between dietary intake of fiber and lipids on gene expression may modulate innate immunity and inflammation, a response which is of interest with regard to chronic inflammation and its adverse effects on health and performance.
Collapse
Affiliation(s)
- Florence Gondret
- INRA, UMR1348 Pegase, F-35590, Saint-Gilles, France. .,Agrocampus-Ouest, UMR1348 Pegase, F-35000, Rennes, France.
| | - Annie Vincent
- INRA, UMR1348 Pegase, F-35590, Saint-Gilles, France. .,Agrocampus-Ouest, UMR1348 Pegase, F-35000, Rennes, France.
| | | | - Anne Siegel
- CNRS-Université de Rennes 1-INRIA, UMR6074 IRISA, Campus de Beaulieu, 35042, Rennes, Cedex, France.
| | - Sandrine Lagarrigue
- INRA, UMR1348 Pegase, F-35590, Saint-Gilles, France. .,Agrocampus-Ouest, UMR1348 Pegase, F-35000, Rennes, France.
| | - Isabelle Louveau
- INRA, UMR1348 Pegase, F-35590, Saint-Gilles, France. .,Agrocampus-Ouest, UMR1348 Pegase, F-35000, Rennes, France.
| | - David Causeur
- Agrocampus-Ouest, UMR6625 IRMAR, F-35000, Rennes, France.
| |
Collapse
|
47
|
Dodson MV, Allen RE, Du M, Bergen WG, Velleman SG, Poulos SP, Fernyhough-Culver M, Wheeler MB, Duckett SK, Young MRI, Voy BH, Jiang Z, Hausman GJ. INVITED REVIEW: Evolution of meat animal growth research during the past 50 years: Adipose and muscle stem cells. J Anim Sci 2016; 93:457-81. [PMID: 26020737 DOI: 10.2527/jas.2014-8221] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
If one were to compare today's animal growth research to research from a mere 50 yr ago, one would see programs with few similarities. The evolution of this research from whole-animal through cell-based and finally molecular and genomic studies has been enhanced by the identification, isolation, and in vitro evaluation of adipose- and muscle-derived stem cells. This paper will highlight the struggles and the milestones that make this evolving area of research what it is today. The contribution of adipose and muscle stem cell research to development and growth, tissue regeneration, and final carcass composition are reviewed.
Collapse
|
48
|
Moreno-Navarrete JM, Moreno M, Ortega F, Sabater M, Xifra G, Ricart W, Fernández-Real JM. CISD1 in association with obesity-associated dysfunctional adipogenesis in human visceral adipose tissue. Obesity (Silver Spring) 2016; 24:139-47. [PMID: 26692580 DOI: 10.1002/oby.21334] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/05/2015] [Accepted: 08/14/2015] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To investigate CISD1 mRNA and protein in human adipose tissue in association with obesity and adipogenesis. METHODS Subcutaneous (SAT) and visceral (VAT) adipose tissue CISD1 gene expression (real-time PCR) and protein (Western blot) levels were investigated in human adipose tissue and during human adipocyte differentiation. RESULTS SAT and VAT CISD1 mRNA and protein levels were significantly decreased in subjects with obesity and negatively correlated with BMI after controlling for age and sex. In participants with morbid obesity, VAT CISD1 gene expression was positively correlated with insulin sensitivity (r = 0.47, P = 0.01), and bariatric surgery-induced weight loss led to increased SAT CISD1 mRNA levels. In both VAT and SAT, CISD1 gene expression was significantly associated with SIRT1, ISCA2, and mitochondrial biogenesis-related (PPARGC1A, TFAM, and MT-CO3) and browning-related (PRDM16 and UCP1) gene expression. In addition, VAT CISD1 gene expression was significantly associated with adipogenic and iron metabolism-related genes. Importantly, these correlations were replicated in a second cohort. At the cellular level, CISD1 gene expression increased during human adipocyte differentiation in correlation with adipogenic genes (r > 0.60, P < 0.005). CONCLUSIONS These data suggest a possible role of CISD1 in obesity-associated dysfunctional adipogenesis in human VAT.
Collapse
Affiliation(s)
- José María Moreno-Navarrete
- Department of Diabetes, Endocrinology and Nutrition, Institut D'investigació Biomèdica De Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto De Salud Carlos III (ISCIII), Girona, Spain
| | - María Moreno
- Department of Diabetes, Endocrinology and Nutrition, Institut D'investigació Biomèdica De Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto De Salud Carlos III (ISCIII), Girona, Spain
| | - Francisco Ortega
- Department of Diabetes, Endocrinology and Nutrition, Institut D'investigació Biomèdica De Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto De Salud Carlos III (ISCIII), Girona, Spain
| | - Mònica Sabater
- Department of Diabetes, Endocrinology and Nutrition, Institut D'investigació Biomèdica De Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto De Salud Carlos III (ISCIII), Girona, Spain
| | - Gemma Xifra
- Department of Diabetes, Endocrinology and Nutrition, Institut D'investigació Biomèdica De Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto De Salud Carlos III (ISCIII), Girona, Spain
| | - Wifredo Ricart
- Department of Diabetes, Endocrinology and Nutrition, Institut D'investigació Biomèdica De Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto De Salud Carlos III (ISCIII), Girona, Spain
| | - José Manuel Fernández-Real
- Department of Diabetes, Endocrinology and Nutrition, Institut D'investigació Biomèdica De Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto De Salud Carlos III (ISCIII), Girona, Spain
| |
Collapse
|
49
|
Mulder P, Morrison MC, Wielinga PY, van Duyvenvoorde W, Kooistra T, Kleemann R. Surgical removal of inflamed epididymal white adipose tissue attenuates the development of non-alcoholic steatohepatitis in obesity. Int J Obes (Lond) 2015; 40:675-84. [PMID: 26499443 PMCID: PMC4827008 DOI: 10.1038/ijo.2015.226] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 09/21/2015] [Accepted: 10/01/2015] [Indexed: 02/06/2023]
Abstract
Background: Non-alcoholic fatty liver disease (NAFLD) is strongly associated with abdominal obesity. Growing evidence suggests that inflammation in specific depots of white adipose tissue (WAT) has a key role in NAFLD progression, but experimental evidence for a causal role of WAT is lacking. Methods: A time-course study in C57BL/6J mice was performed to establish which WAT depot is most susceptible to develop inflammation during high-fat diet (HFD)-induced obesity. Crown-like structures (CLS) were quantified in epididymal (eWAT), mesenteric (mWAT) and inguinal/subcutaneous (iWAT) WAT. The contribution of inflamed WAT to NAFLD progression was investigated by surgical removal of a selected WAT depot and compared with sham surgery. Plasma markers were analyzed by enzyme-linked immunosorbent assay (cytokines/adipokines) and lipidomics (lipids). Results: In eWAT, CLS were formed already after 12 weeks of HFD, which coincided with maximal adipocyte size and fat depot mass, and preceded establishment of non-alcoholic steatohepatitis (NASH). By contrast, the number of CLS were low in mWAT and iWAT. Removal of inflamed eWAT after 12 weeks (eWATx group), followed by another 12 weeks of HFD feeding, resulted in significantly reduced NASH in eWATx. Inflammatory cell aggregates (−40% P<0.05) and inflammatory genes (e.g., TNFα, −37% P<0.05) were attenuated in livers of eWATx mice, whereas steatosis was not affected. Concomitantly, plasma concentrations of circulating proinflammatory mediators, viz. leptin and specific saturated and monounsaturated fatty acids, were also reduced in the eWATx group. Conclusions: Intervention in NAFLD progression by removal of inflamed eWAT attenuates the development of NASH and reduces plasma levels of specific inflammatory mediators (cytokines and lipids). These data support the hypothesis that eWAT is causally involved in the pathogenesis of NASH.
Collapse
Affiliation(s)
- P Mulder
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands.,Leiden University Medical Center, Department of Cardiovascular Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - M C Morrison
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - P Y Wielinga
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - W van Duyvenvoorde
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - T Kooistra
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands
| | - R Kleemann
- Department of Metabolic Health Research, Netherlands Organization for Applied Scientific Research (TNO), Leiden, The Netherlands.,Leiden University Medical Center, Department of Cardiovascular Surgery, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
50
|
Kellow NJ, Coughlan MT. Effect of diet-derived advanced glycation end products on inflammation. Nutr Rev 2015; 73:737-59. [PMID: 26377870 DOI: 10.1093/nutrit/nuv030] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Advanced glycation end products (AGEs) formed via the Maillard reaction during the thermal processing of food contributes to the flavor, color, and aroma of food. A proportion of food-derived AGEs and their precursors is intestinally absorbed and accumulates within cells and tissues. AGEs have been implicated in the pathogenesis of diabetes-related complications and several chronic diseases via interaction with the receptor for AGEs, which promotes the transcription of genes that control inflammation. The dicarbonyls, highly reactive intermediates of AGE formation, are also generated during food processing and may incite inflammatory responses through 1) the suppression of protective pathways, 2) the incretin axis, 3) the modulation of immune-mediated signaling, and 4) changes in gut microbiota profile and metabolite sensors. In animal models, restriction of dietary AGEs attenuates chronic low-grade inflammation, but current evidence from human studies is less clear. Here, the emerging relationship between excess dietary AGE consumption and inflammation is explored, the utility of dietary AGE restriction as a therapeutic strategy for the attenuation of chronic diseases is discussed, and possible avenues for future investigation are suggested.
Collapse
Affiliation(s)
- Nicole J Kellow
- N.J. Kellow and M.T. Coughlan are with the Glycation, Nutrition and Metabolism Laboratory, Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia, and the Department of Epidemiology & Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia. M.T. Coughlan is with the Department of Medicine, Central Clinical School, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia
| | - Melinda T Coughlan
- N.J. Kellow and M.T. Coughlan are with the Glycation, Nutrition and Metabolism Laboratory, Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia, and the Department of Epidemiology & Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia. M.T. Coughlan is with the Department of Medicine, Central Clinical School, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria, Australia.
| |
Collapse
|