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Öztürk D, Koca AO, Keskin M, Öztürk B, Oğuz EF, Turhan T, Buluş H. Patients who received sleeve gastrectomy have lower plasma osteopontin levels than those who did not. Clinics (Sao Paulo) 2024; 79:100352. [PMID: 38574573 PMCID: PMC10999792 DOI: 10.1016/j.clinsp.2024.100352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 03/03/2024] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND The aim of this study was to compare metabolic parameters, plasma Osteopontin (OPN) and Hepatocyte Growth Factor (HGF) levels between Sleeve Gastrectomy (SG) patients in their 6th post-operation month and healthy control patients. METHODS Height, weight, Body Mass Index (BMI) and laboratory parameters of 58 SG patients aged 18‒65 years (Group 1) and 46 healthy control patients (Group 2) were compared. In addition, preoperative and postoperative sixth-month BMI and laboratory parameters of the patients in Group 1 were compared. RESULTS The mean age and gender distributions of the groups were similar (p > 0.05). Mean BMI was 28.9 kg/m2 in Group 1 and 27 kg/m2 in Group 2 (p < 0.01). While plasma HGF levels were similar between both groups, plasma OPN levels were higher in Group 2 (p < 0.001). Fasting plasma glucose, total cholesterol, triglyceride, fasting plasma insulin and insulin resistance values were higher in Group 1, while alanine aminotransferase and aspartate aminotransferase levels were higher in Group 2 (p < 0.05). There was a strong correlation between plasma HGF and OPN levels in Group 1, but not in Group 2 (Rho = 0.805, p < 0.001). CONCLUSION OPN and HGF are promising biomarkers that can be used to better understand and detect problems related to obesity. The fact that patients in the early post-SG period had lower plasma OPN and similar plasma HGF compared to non-surgical patients of similar age and gender with higher BMI may be another favorable and previously unknown metabolic effect of SG.
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Affiliation(s)
- Doğan Öztürk
- University of Health Sciences, Ankara Atatürk Sanatoryum Education and Research Hospital, Department of General Surgery, Ankara, Turkey.
| | - Arzu Or Koca
- University of Health Sciences, Dr. Abdurrahman Yurtaslan Ankara Onkoloji Education and Research Hospital, Department of Endocrinology and Metabolism, Ankara, Turkey
| | - Müge Keskin
- University of Health Sciences, Ankara City Hospital, Department of Endocrinology and Metabolism, Ankara, Turkey
| | - Bülent Öztürk
- University of Health Sciences, Ankara Atatürk Sanatoryum Education and Research Hospital, Department of General Surgery, Ankara, Turkey
| | - Esra Fırat Oğuz
- University of Health Sciences, Ankara City Hospital, Department of Medical Biochemistry, Ankara, Turkey
| | - Turan Turhan
- University of Health Sciences, Ankara City Hospital, Department of Medical Biochemistry, Ankara, Turkey
| | - Hakan Buluş
- University of Health Sciences, Ankara Atatürk Sanatoryum Education and Research Hospital, Department of General Surgery, Ankara, Turkey
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Savage TM, Fortson KT, de Los Santos-Alexis K, Oliveras-Alsina A, Rouanne M, Rae SS, Gamarra JR, Shayya H, Kornberg A, Cavero R, Li F, Han A, Haeusler RA, Adam J, Schwabe RF, Arpaia N. Amphiregulin from regulatory T cells promotes liver fibrosis and insulin resistance in non-alcoholic steatohepatitis. Immunity 2024; 57:303-318.e6. [PMID: 38309273 PMCID: PMC10922825 DOI: 10.1016/j.immuni.2024.01.009] [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: 09/23/2022] [Revised: 11/20/2023] [Accepted: 01/10/2024] [Indexed: 02/05/2024]
Abstract
Production of amphiregulin (Areg) by regulatory T (Treg) cells promotes repair after acute tissue injury. Here, we examined the function of Treg cells in non-alcoholic steatohepatitis (NASH), a setting of chronic liver injury. Areg-producing Treg cells were enriched in the livers of mice and humans with NASH. Deletion of Areg in Treg cells, but not in myeloid cells, reduced NASH-induced liver fibrosis. Chronic liver damage induced transcriptional changes associated with Treg cell activation. Mechanistically, Treg cell-derived Areg activated pro-fibrotic transcriptional programs in hepatic stellate cells via epidermal growth factor receptor (EGFR) signaling. Deletion of Areg in Treg cells protected mice from NASH-dependent glucose intolerance, which also was dependent on EGFR signaling on hepatic stellate cells. Areg from Treg cells promoted hepatocyte gluconeogenesis through hepatocyte detection of hepatic stellate cell-derived interleukin-6. Our findings reveal a maladaptive role for Treg cell-mediated tissue repair functions in chronic liver disease and link liver damage to NASH-dependent glucose intolerance.
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Affiliation(s)
- Thomas M Savage
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA
| | - Katherine T Fortson
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA
| | | | | | - Mathieu Rouanne
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA
| | - Sarah S Rae
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA
| | | | - Hani Shayya
- Mortimer B. Zuckerman Mind, and Brain and Behavior Institute, Columbia University, New York, NY, USA
| | - Adam Kornberg
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA; Columbia Center for Translational Immunology, Columbia University, New York, NY, USA
| | - Renzo Cavero
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA
| | - Fangda Li
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA
| | - Arnold Han
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA; Columbia Center for Translational Immunology, Columbia University, New York, NY, USA; Department of Medicine, Columbia University, New York, NY, USA
| | - Rebecca A Haeusler
- Naomi Berrie Diabetes Center, Columbia University, New York, NY, USA; Department of Pathology and Cell Biology, Columbia University, New York, NY, USA
| | - Julien Adam
- Pathology Department, Hopital Paris Saint-Joseph, Paris, France; INSERM U1186, Gustave Roussy, Villejuif, France
| | | | - Nicholas Arpaia
- Department of Microbiology & Immunology, Columbia University, New York, NY, USA; Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY, USA.
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3
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Zhou Y, Ni Y, Wang Z, Prud'homme GJ, Wang Q. Causal effects of non-alcoholic fatty liver disease on osteoporosis: a Mendelian randomization study. Front Endocrinol (Lausanne) 2023; 14:1283739. [PMID: 38149094 PMCID: PMC10749958 DOI: 10.3389/fendo.2023.1283739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 11/29/2023] [Indexed: 12/28/2023] Open
Abstract
Background Osteoporosis (OP) is a systemic skeletal disease characterized by compromised bone strength leading to an increased risk of fracture. There is an ongoing debate on whether non-alcoholic fatty liver disease (NAFLD) is an active contributor or an innocent bystander in the pathogenesis of OP. The aim of this study was to assess the causal association between NAFLD and OP. Methods We performed two-sample Mendelian randomization (MR) analyses to investigate the causal association between genetically predicted NAFLD [i.e., imaging-based liver fat content (LFC), chronically elevated serum alanine aminotransferase (cALT) and biopsy-confirmed NAFLD] and risk of OP. The inverse variant weighted method was performed as main analysis to obtain the causal estimates. Results Imaging-based LFC and biopsy-confirmed NAFLD demonstrated a suggestive causal association with OP ([odds ratio (OR): 1.003, 95% CI: 1.001-1.004, P < 0.001; OR: 1.001, 95% CI: 1.000-1.002, P = 0.031]). The association between cALT and OP showed a similar direction, but was not statistically significant (OR: 1.001, 95% CI: 1.000-1.002, P = 0.079). Repeated analyses after exclusion of genes associated with confounding factors showed consistent results. Sensitivity analysis indicated low heterogeneity, high reliability and low pleiotropy of the causal estimates. Conclusion The two-sample MR analyses suggest a causal association between genetically predicted NAFLD and OP.
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Affiliation(s)
- Yue Zhou
- Department of Endocrinology and Metabolism, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
| | - Yunzhi Ni
- Department of Endocrinology and Metabolism, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
| | - Zhihong Wang
- Department of Endocrinology and Metabolism, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
| | - Gerald J Prud'homme
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Qinghua Wang
- Department of Endocrinology and Metabolism, Huashan Hospital, Shanghai Medical School, Fudan University, Shanghai, China
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4
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Lischka J, Schanzer A, de Gier C, Greber-Platzer S, Zeyda M. Macrophage-associated markers of metaflammation are linked to metabolic dysfunction in pediatric obesity. Cytokine 2023; 171:156372. [PMID: 37729736 DOI: 10.1016/j.cyto.2023.156372] [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: 08/11/2023] [Revised: 09/12/2023] [Accepted: 09/14/2023] [Indexed: 09/22/2023]
Abstract
BACKGPOUND Metabolically driven chronic low-grade adipose tissue inflammation, so-called metaflammation, is a central feature in obesity. This inflammatory tone is largely driven by adipose tissue macrophages (ATM), which express pro- and anti-inflammatory markers and cytokines such as, e.g., IL-1 receptor antagonist (IL-1RA), CD163 and osteopontin (OPN). Metaflammation ultimately leads to the development of cardiometabolic diseases. This study aimed to evaluate the association between selected adipose tissue macrophage-associated markers and metabolic comorbidities in pediatric obesity. METHODS From a pediatric cohort with obesity (n = 108), clinically thoroughly characterized including diverse routine blood parameters, oral glucose tolerance test and liver MRI, plasma IL-1RA, soluble (s)CD163 and OPN were measured by ELISA. RESULTS We observed significantly higher IL-1RA, sCD163, and OPN levels in the plasma of children with metabolic-dysfunction associated fatty liver disease (MAFLD) and metabolic syndrome. Moreover, IL-1RA and sCD163 correlated with hepatic disease and apoptosis markers alanine aminotransferase and CK-18. IL-1RA concentrations additionally correlated with insulin resistance, while children with disturbed glucose metabolism had significantly higher levels of sCD163. CONCLUSION MAFLD and other metabolic disorders in pediatric patients with obesity are associated with an elevation of adipose tissue macrophage-related inflammation markers.
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Affiliation(s)
- Julia Lischka
- Division of Pediatric Pulmonology, Allergology and Endocrinology, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria; Department of Pediatrics, Paracelsus Medical University, Salzburg, Austria; Obesity Research Unit, Paracelsus Medical University, Salzburg, Austria
| | - Andrea Schanzer
- Division of Pediatric Pulmonology, Allergology and Endocrinology, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Charlotte de Gier
- Division of Pediatric Pulmonology, Allergology and Endocrinology, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Susanne Greber-Platzer
- Division of Pediatric Pulmonology, Allergology and Endocrinology, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Maximilian Zeyda
- Division of Pediatric Pulmonology, Allergology and Endocrinology, Department of Pediatrics and Adolescent Medicine, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria.
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5
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Soysouvanh F, Rousseau D, Bonnafous S, Bourinet M, Strazzulla A, Patouraux S, Machowiak J, Farrugia MA, Iannelli A, Tran A, Anty R, Luci C, Gual P. Osteopontin-driven T-cell accumulation and function in adipose tissue and liver promoted insulin resistance and MAFLD. Obesity (Silver Spring) 2023; 31:2568-2582. [PMID: 37724058 DOI: 10.1002/oby.23868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 06/20/2023] [Accepted: 06/26/2023] [Indexed: 09/20/2023]
Abstract
OBJECTIVE This study investigated the contribution of osteopontin/secreted phosphoprotein 1 (SPP1) to T-cell regulation in initiation of obesity-driven adipose tissue (AT) inflammation and macrophage infiltration and the subsequent impact on insulin resistance (IR) and metabolic-associated fatty liver disease (MAFLD) development. METHODS SPP1 and T-cell marker expression was evaluated in AT and liver according to type 2 diabetes and MAFLD in human individuals with obesity. The role of SPP1 on T cells was evaluated in Spp1-knockout mice challenged with a high-fat diet. RESULTS In humans with obesity, elevated SPP1 expression in AT was parallel to T-cell marker expression (CD4, CD8A) and IR. Weight loss reversed AT inflammation with decreased SPP1 and CD8A expression. In liver, elevated SPP1 expression correlated with MAFLD severity and hepatic T-cell markers. In mice, although Spp1 deficiency did not impact obesity, it did improve AT IR associated with prevention of proinflammatory T-cell accumulation at the expense of regulatory T cells. Spp1 deficiency also decreased ex vivo helper T cell, subtype 1 (Th1) polarization of AT CD4+ and CD8+ T cells. In addition, Spp1 deficiency significantly reduced obesity-associated liver steatosis and inflammation. CONCLUSIONS Current findings highlight a critical role of SPP1 in the initiation of obesity-driven chronic inflammation by regulating accumulation and/or polarization of T cells. Early targeting of SPP1 could be beneficial for IR and MAFLD treatment.
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Affiliation(s)
| | | | | | - Manon Bourinet
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France
| | | | | | - Jean Machowiak
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France
| | | | | | - Albert Tran
- Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Rodolphe Anty
- Université Côte d'Azur, CHU, INSERM, U1065, C3M, Nice, France
| | - Carmelo Luci
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France
| | - Philippe Gual
- Université Côte d'Azur, INSERM, U1065, C3M, Nice, France
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6
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Musale V, Wasserman DH, Kang L. Extracellular matrix remodelling in obesity and metabolic disorders. LIFE METABOLISM 2023; 2:load021. [PMID: 37383542 PMCID: PMC10299575 DOI: 10.1093/lifemeta/load021] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Obesity causes extracellular matrix (ECM) remodelling which can develop into serious pathology and fibrosis, having metabolic effects in insulin-sensitive tissues. The ECM components may be increased in response to overnutrition. This review will focus on specific obesity-associated molecular and pathophysiological mechanisms of ECM remodelling and the impact of specific interactions on tissue metabolism. In obesity, complex network of signalling molecules such as cytokines and growth factors have been implicated in fibrosis. Increased ECM deposition contributes to the pathogenesis of insulin resistance at least in part through activation of cell surface integrin receptors and CD44 signalling cascades. These cell surface receptors transmit signals to the cell adhesome which orchestrates an intracellular response that adapts to the extracellular environment. Matrix proteins, glycoproteins, and polysaccharides interact through ligand-specific cell surface receptors that interact with the cytosolic adhesion proteins to elicit specific actions. Cell adhesion proteins may have catalytic activity or serve as scaffolds. The vast number of cell surface receptors and the complexity of the cell adhesome have made study of their roles challenging in health and disease. Further complicating the role of ECM-cell receptor interactions is the variation between cell types. This review will focus on recent insights gained from studies of two highly conserved, ubiquitously axes and how they contribute to insulin resistance and metabolic dysfunction in obesity. These are the collagen-integrin receptor-IPP (ILK-PINCH-Parvin) axis and the hyaluronan-CD44 interaction. We speculate that targeting ECM components or their receptor-mediated cell signalling may provide novel insights into the treatment of obesity-associated cardiometabolic complications.
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Affiliation(s)
- Vishal Musale
- Division of Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland DD1 9SY, UK
| | - David H. Wasserman
- Department of Molecular Physiology and Biophysics, Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN 37235, USA
| | - Li Kang
- Division of Systems Medicine, School of Medicine, University of Dundee, Dundee, Scotland DD1 9SY, UK
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7
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Xu Z, Xi F, Deng X, Ni Y, Pu C, Wang D, Lou W, Zeng X, Su N, Chen C, Zeng Z, Deng L, Jiang M. Osteopontin Promotes Macrophage M1 Polarization by Activation of the JAK1/STAT1/HMGB1 Signaling Pathway in Nonalcoholic Fatty Liver Disease. J Clin Transl Hepatol 2023; 11:273-283. [PMID: 36643029 PMCID: PMC9817049 DOI: 10.14218/jcth.2021.00474] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 04/12/2022] [Accepted: 05/05/2022] [Indexed: 01/18/2023] Open
Abstract
Background and Aims Osteopontin (OPN) is reported to be associated with the pathogenesis of nonalcoholic fatty liver disease (NAFLD). However, the function of OPN in NAFLD is still inconclusive. Therefore, our aim in this study was to evaluate the role of OPN in NAFLD and clarify the involved mechanisms. Methods We analyzed the expression change of OPN in NAFLD by bioinformatic analysis, qRT-PCR, western blotting and immunofluorescence staining. To clarify the role of OPN in NAFLD, the effect of OPN from HepG2 cells on macrophage polarization and the involved mechanisms were examined by FACS and western blotting. Results OPN was significantly upregulated in NAFLD patients compared with normal volunteers by microarray data, and the high expression of OPN was related with disease stage and progression. OPN level was also significantly increased in liver tissue samples of NAFLD from human and mouse, and in HepG2 cells treated with oleic acid (OA). Furthermore, the supernatants of OPN-treated HepG2 cells promoted the macrophage M1 polarization. Mechanistically, OPN activated the janus kinase 1(JAK1)/signal transducers and activators of transcription 1 (STAT1) signaling pathway in HepG2 cells, and consequently HepG2 cells secreted more high-mobility group box 1 (HMGB1), thereby promoting macrophage M1 polarization. Conclusions OPN promoted macrophage M1 polarization by increasing JAK1/STAT1-induced HMGB1 secretion in hepatocytes.
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Affiliation(s)
- Zhihao Xu
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
| | - Feiyang Xi
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
| | - Xinxin Deng
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
- School of Pharmacy, Nanchang University, Nanchang, Jiangxi, China
| | - Yuqi Ni
- Central Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang, China
| | - Changqin Pu
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
| | - Dan Wang
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
| | - Weiming Lou
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
| | - Xufang Zeng
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
| | - Ning Su
- Jiangxi Provincial Key Laboratory of Preventive Medicine, School of Public Health, Nanchang University, Nanchang, Jiangxi, China
| | - Chen Chen
- School of Basic Medical Science, Nanchang University, Nanchang, Jiangxi, China
| | - Ziqiang Zeng
- Jiangxi Provincial Key Laboratory of Preventive Medicine, School of Public Health, Nanchang University, Nanchang, Jiangxi, China
| | - Libin Deng
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
- Jiangxi Provincial Key Laboratory of Preventive Medicine, School of Public Health, Nanchang University, Nanchang, Jiangxi, China
| | - Meixiu Jiang
- The Institute of Translational Medicine, Nanchang University, Nanchang, Jiangxi, China
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Levy E, Marcil V, Tagharist Ép Baumel S, Dahan N, Delvin E, Spahis S. Lactoferrin, Osteopontin and Lactoferrin–Osteopontin Complex: A Critical Look on Their Role in Perinatal Period and Cardiometabolic Disorders. Nutrients 2023; 15:nu15061394. [PMID: 36986124 PMCID: PMC10052990 DOI: 10.3390/nu15061394] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/02/2023] [Accepted: 03/11/2023] [Indexed: 03/18/2023] Open
Abstract
Milk-derived bioactive proteins have increasingly gained attention and consideration throughout the world due to their high-quality amino acids and multiple health-promoting attributes. Apparently, being at the forefront of functional foods, these bioactive proteins are also suggested as potential alternatives for the management of various complex diseases. In this review, we will focus on lactoferrin (LF) and osteopontin (OPN), two multifunctional dairy proteins, as well as to their naturally occurring bioactive LF–OPN complex. While describing their wide variety of physiological, biochemical, and nutritional functionalities, we will emphasize their specific roles in the perinatal period. Afterwards, we will evaluate their ability to control oxidative stress, inflammation, gut mucosal barrier, and intestinal microbiota in link with cardiometabolic disorders (CMD) (obesity, insulin resistance, dyslipidemia, and hypertension) and associated complications (diabetes and atherosclerosis). This review will not only attempt to highlight the mechanisms of action, but it will critically discuss the potential therapeutic applications of the underlined bioactive proteins in CMD.
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Affiliation(s)
- Emile Levy
- Research Centre, CHU Sainte-Justine, 3175 Sainte-Catherine Road, Montreal, QC H3T 1C5, Canada
- Department of Nutrition, Université de Montreal, C. P. 6205, succursale Centre-ville, Montreal, QC H3C 3T5, Canada
| | - Valérie Marcil
- Research Centre, CHU Sainte-Justine, 3175 Sainte-Catherine Road, Montreal, QC H3T 1C5, Canada
- Department of Nutrition, Université de Montreal, C. P. 6205, succursale Centre-ville, Montreal, QC H3C 3T5, Canada
| | - Sarah Tagharist Ép Baumel
- Research Centre, CHU Sainte-Justine, 3175 Sainte-Catherine Road, Montreal, QC H3T 1C5, Canada
- Department of Nutrition, Université de Montreal, C. P. 6205, succursale Centre-ville, Montreal, QC H3C 3T5, Canada
| | - Noam Dahan
- Research Centre, CHU Sainte-Justine, 3175 Sainte-Catherine Road, Montreal, QC H3T 1C5, Canada
| | - Edgard Delvin
- Research Centre, CHU Sainte-Justine, 3175 Sainte-Catherine Road, Montreal, QC H3T 1C5, Canada
- Biochemistry &Molecular Medicine, Faculty of Medicine, Université de Montreal, C. P. 6205, succursale Centre-ville, Montreal, QC H3C 3T5, Canada
| | - Schohraya Spahis
- Research Centre, CHU Sainte-Justine, 3175 Sainte-Catherine Road, Montreal, QC H3T 1C5, Canada
- Biochemistry &Molecular Medicine, Faculty of Medicine, Université de Montreal, C. P. 6205, succursale Centre-ville, Montreal, QC H3C 3T5, Canada
- Correspondence: ; Tel.: +1-(514)-345-4832
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Wang X, Wang Z, Liu B, Jin R, Song Y, Fei R, Cong X, Huang R, Li X, Yang J, Wei L, Rao H, Liu F. Characteristic gene expression in the liver monocyte-macrophage-DC system is associated with the progression of fibrosis in NASH. Front Immunol 2023; 14:1098056. [PMID: 36911682 PMCID: PMC9998489 DOI: 10.3389/fimmu.2023.1098056] [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: 11/14/2022] [Accepted: 02/06/2023] [Indexed: 02/26/2023] Open
Abstract
Background The monocyte-macrophage-dendritic cell (DC) (MMD) system exerts crucial functions that may modulate fibrogenesis in nonalcoholic steatohepatitis (NASH). In this study, we explored the cell characteristics, distribution and developmental trajectory of the liver MMD system in NASH mice with fibrosis and clarified characteristic genes of the MMD system involved in liver fibrosis progression in NASH mice and patients. Methods Single cells in liver tissue samples from NASH and normal mice were quantified using single-cell RNA sequencing (scRNA-seq) analysis. Differentially expressed genes (DEGs) in the MMD system by pseudotime analysis were validated by tyramide signal amplification (TSA)-immunohistochemical staining (IHC) and analyzed by second harmonic generation (SHG)/two-photon excitation fluorescence (TPEF). Results Compared with control mice, there were increased numbers of monocytes, Kupffer cells, and DCs in two NASH mouse models. From the transcriptional profiles of these single cells, we identified 8 monocyte subsets (Mono1-Mono8) with different molecular and functional properties. Furthermore, the pseudotime analysis showed that Mono5 and Mono6 were at the beginning of the trajectory path, whereas Mono2, Mono4, Kupffer cells and DCs were at a terminal state. Genes related to liver collagen production were at the late stage of this trajectory path. DEGs analysis revealed that the genes Fmnl1 and Myh9 in the MMD system were gradually upregulated during the trajectory. By TSA-IHC, the Fmnl1 and Myh9 expression levels were increased and associated with collagen production and fibrosis stage in NASH mice and patients. Conclusions Our transcriptome data provide a novel landscape of the MMD system that is involved in advanced NASH disease status. Fmnl1 and Myh9 expression in the MMD system was associated with the progression of NASH fibrosis.
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Affiliation(s)
- Xiaoxiao Wang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Zilong Wang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Baiyi Liu
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Rui Jin
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Yuyun Song
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Ran Fei
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Xu Cong
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Rui Huang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Xiaohe Li
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Jia Yang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Lai Wei
- Beijing Tsinghua Changgung Hospital, Tsinghua University, Beijing, China
| | - Huiying Rao
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
| | - Feng Liu
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China
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Osteopontin Exacerbates High-Fat Diet-Induced Metabolic Disorders in a Microbiome-Dependent Manner. mBio 2022; 13:e0253122. [PMID: 36300928 PMCID: PMC9765578 DOI: 10.1128/mbio.02531-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The gut microbiome is involved in metabolic disorders. Osteopontin (OPN), as a key cytokine, contributes to various inflammation-related diseases. The underlying role of OPN in the microbiome remains poorly understood. Here, we investigated whether OPN could modulate metabolic disorders by affecting gut microbiota. In our present study, we found that the expression of OPN was elevated in individuals with obesity compared to that observed in healthy controls. There was a positive correlation between plasma OPN levels and body mass index (BMI) in humans. Moreover, OPN significantly exacerbated lipid accumulation and metabolic disorders in high-fat diet (HFD)-fed mice. Importantly, OPN significantly aggravated HFD-induced gut dysbiosis with a key signature profile. Fecal microbiota transplantation also supported the role of OPN in HFD-induced metabolic disorders in a microbiota-dependent manner. Moreover, the microbiome shift of OPN-deficient mice would be compensated to resemble those of wild-type mice by feeding with either OPN-containing milk or recombinant OPN protein in vivo. Furthermore, metagenomic analysis showed that OPN induced a higher abundance of Dorea and a lower abundance of Lactobacillus, which were positively and negatively correlated with body weight, respectively. Indeed, the abundance of Dorea was significantly decreased after Lactobacillus administration, suggesting that OPN may regulate the intestinal abundance of Dorea by reducing the colonization of Lactobacillus. We further confirmed that OPN decreased the adhesion of Lactobacillus to intestinal epithelial cells through the Notch signaling pathway. This study suggested that OPN could exacerbate HFD-induced metabolic dysfunctions through the OPN-induced alteration of the gut microbiome. Therefore, OPN could be a potential therapeutic target for metabolic syndrome. IMPORTANCE Gut microbiota are involved in metabolic disorders. However, microbiome-based therapeutic interventions are not always effective, which might be due to interference of the host factors. Here, we identified a strong positive correlation between OPN levels and BMI in humans. Next, we confirmed that OPN could aggravate high-fat diet-induced metabolic disorders in mice. Importantly, we found that fecal microbiota transplantation from OPN-deficient mice significantly alleviated metabolic disorders in WT mice. OPN directly induces the remodeling of the gut microbiota both in vitro and in vivo. These findings indicate that OPN could contribute to metabolic disorders by inducing an alteration of gut microbiota. OPN regulated the relative abundance of Lactobacillus by decreasing the adhesion of Lactobacillus to intestinal epithelial cells through the Notch signaling pathway. These data identify OPN as a potential pharmaceutical target for weight control and for the treatment of metabolic disorders.
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Huang B, Wen W, Ye S. TSH-SPP1/TRβ-TSH positive feedback loop mediates fat deposition of hepatocyte: Crosstalk between thyroid and liver. Front Immunol 2022; 13:1009912. [PMID: 36300106 PMCID: PMC9589424 DOI: 10.3389/fimmu.2022.1009912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/26/2022] [Indexed: 11/25/2022] Open
Abstract
Aims We conducted this study with two aims: (1) whether TRβ could be damaged by NAFLD, thereby represent thyroid hormone resistance-like manifestation and (2) to analyze the potential role of SPP1 in TH signaling pathway on the process of NAFLD. This study is expected to provide a new perspective on the therapeutic mechanism in the pathological course of NAFLD. Methods A total of 166 patients diagnosed with type 2 diabetes mellitus (T2DM) were enrolled in this study. All patients had a BMI above 24 kg/m2 and were stratified into two groups: NAFLD and Non-NAFLD groups. Ages, gender, BMI, duration of diabetes and biochemical markers were obtained from participants' records. We downloaded the dataset GSE48452 from GEO. The Pathview library was used to make the thyroid hormone signaling pathway visualization. The CIBERSORT algorithm was applied to calculate the infiltrated immune cells in obese NAFLD patients. C57BL/6 mice were randomly selected to constitute the normal control (NC) group and were fed a normal chow diet; the rest of the mice were fed a high-fat diet (HFD). After 12 weeks HFD feeding, the mice were sacrificed by cervical dislocation, and blood samples were collected. Mouse livers were also collected; one part of each liver was fixed in 10% formalin for histological analysis, and the other part was snap-frozen for subsequent molecular analyses. To explore the relationship between SPP1, TRβ and lipid deposition in hepatocytes, HepG2 cells were treated with 50 μ M concentration of PA and/or 20 ng/ml concentration of rh-SPP1 for 48h. In addition, the PC3.1-TRβ plasmid was constructed for further validation in HepG2 cells. We used THP-1 cells to construct an M1 macrophage model in vitro. We then analyzed THP-1 cells treated with various concentrations of PA or TSH. Results (1) After adjusting for all factors that appeared P value less than 0.1 in the univariate analysis, BMI, TSH, and FT3 were significant independent risk factors of NAFLD (ORs were 1.218, 1.694, and 2.259, respectively); (2) A further analysis with BMI stratification indiacted that both FT3 and TSH had a significant change between individuals with NAFLD and Non-NAFLD in obesity subgroup; however, there was no statistic difference in over-weight group; (3) Bioinformatics analysis of GSE48452 had shown that several key molecular (including TRβ) of thyroid hormone pathway affected by NAFLD induced transcriptomic changes and the expression levels of SPP1, FABP4 and RPS4Y1 were significantly higher, while the expression levels of PZP and VIL1 were significantly decreased in NAFLD patients(adjusted p < 0.05, |logFC| > 1.0). The CIBERSORT algorithm showed increased M0 and M1, decreased M2 macrophage infiltration in NAFLD with comparison to healthy obese group; (4) After 12 weeks of HFD-feeding, the obesity mice had significantly higher serum TSH and In IHC-stained liver sections of obesity group, the intensity of SPP1 had a significantly increased, while TRβ reduced; (5) In vitro studies have shown SPP1 aggravated lipid deposition in hepatic cells dependent on down-regulating the expression of TRβ and TSH acts to promote secretion of SPP1 in M1 macrophage cells. Conclusions SPP1 secretion induced by M1 macrophage polarization, which may down-regulates TRβ in hepatocytes via paracrine manner, on the one hand, the lipid deposition aggravating in liver, on the other hand, a compensatory increase of TSH in serum. The increased TSH can further lead to the following SPP1 secretion of M1 macrophage. The positive feedback crosstalk between thyroid and liver, may be plays an important role in maintaining and amplifying pathological process of NAFLD.
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Affiliation(s)
- Bin Huang
- Department of Endocrinology, The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Science and Medicine, University of Science and Technology of China, Hefei, China
| | - Wenjie Wen
- Department of Endocrinology, The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Science and Medicine, University of Science and Technology of China, Hefei, China
- Division of Life Sciences, University of Science and Technology of China, Hefei, China
| | - Shandong Ye
- Department of Endocrinology, The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Science and Medicine, University of Science and Technology of China, Hefei, China
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Karampatsou SI, Paltoglou G, Genitsaridi SM, Kassari P, Charmandari E. The Effect of a Comprehensive Life-Style Intervention Program of Diet and Exercise on Four Bone-Derived Proteins, FGF-23, Osteopontin, NGAL and Sclerostin, in Overweight or Obese Children and Adolescents. Nutrients 2022; 14:3772. [PMID: 36145151 PMCID: PMC9505283 DOI: 10.3390/nu14183772] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/05/2022] [Accepted: 09/07/2022] [Indexed: 11/17/2022] Open
Abstract
The adipose and bone tissues demonstrate considerable interconnected endocrine function. In the present study, we determined the concentrations of fibroblast growth factor-23 (FGF-23), osteopontin, neutrophil gelatinase-associated lipocalin (NGAL) and sclerostin in 345 children and adolescents who were overweight or obese (mean age ± SD mean: 10.36 ± 0.16 years; 172 males, 173 females; 181 prepubertal; and 164 pubertal) before and after their participation in a comprehensive life-style intervention program of diet and exercise for one year. Following the one-year life-style interventions, there was a significant decrease in BMI (p < 0.01), FGF-23 (p < 0.05), osteopontin (p < 0.01) and NGAL (p < 0.01), and an increase in sclerostin (p < 0.01) concentrations. BMI z-score (b = 0.242, p < 0.05) and fat mass (b = 0.431, p < 0.05) were the best positive predictors and waist-to-height ratio (WHtR) (b = −0.344, p < 0.05) was the best negative predictor of the change of osteopontin. NGAL concentrations correlated positively with HbA1C (b = 0.326, p < 0.05), WHtR (b = 0.439, p < 0.05) and HOMA-IR (b = 0.401, p < 0.05), while BMI (b = 0.264, p < 0.05), fat mass (b = 1.207, p < 0.05), HDL (b = 0.359, p < 0.05) and waist circumference (b = 0.263, p < 0.05) were the best positive predictors of NGAL. These results indicate that FGF-23, osteopontin, NGAL and sclerostin are associated with being overweight or obese and are altered in relation to alterations in BMI. They also indicate a crosstalk between adipose tissue and bone tissue and may play a role as potential biomarkers of glucose metabolism. Further studies are required to delineate the physiological mechanisms underlying this association in children and adolescents.
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Affiliation(s)
- Sofia I. Karampatsou
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
| | - George Paltoglou
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
- Division of Endocrinology and Metabolism, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | - Sofia M. Genitsaridi
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
| | - Penio Kassari
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
- Division of Endocrinology and Metabolism, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
| | - Evangelia Charmandari
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
- Division of Endocrinology and Metabolism, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
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Vachliotis ID, Anastasilakis AD, Goulas A, Goulis DG, Polyzos SA. Nonalcoholic fatty liver disease and osteoporosis: A potential association with therapeutic implications. Diabetes Obes Metab 2022; 24:1702-1720. [PMID: 35589613 DOI: 10.1111/dom.14774] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/01/2022] [Accepted: 05/17/2022] [Indexed: 11/11/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) and osteoporosis are two highly prevalent metabolic diseases. Increasing experimental evidence supports a pathophysiological link between NAFLD and osteoporosis. A key feature could be chronic, low-grade inflammation, which characterizes NAFLD and possibly affects bone metabolism. In this context, several factors, including but not limited to receptor activator of nuclear factor kappa-B ligand, osteoprotegerin, osteopontin and osteocalcin, may serve as mediators. In the clinical setting, most but not all epidemiological evidence indicates that NAFLD is associated with lower bone mineral density or osteoporosis in adults. Although an association between NAFLD and osteoporosis has not yet been established, and thus remains speculative, pharmacological considerations already exist. Some of the current and emerging pharmacological options for NAFLD have shown possible anti-osteoporotic properties (eg, vitamin E, obeticholic acid, semaglutide), while others (eg, pioglitazone, canagliflozin) have been associated with increased risk of fractures and may be avoided in patients with NAFLD and concomitant osteoporosis, especially those at high fracture risk. Conversely, some anti-osteoporotic medications (denosumab) might benefit NAFLD, while others (raloxifene) might adversely affect it and, consequently, may be avoided in patients with osteoporosis and NAFLD. If an association between NAFLD and osteoporosis is established, a medication that could target both diseases would be a great advancement. This review summarizes the main experimental and clinical evidence on the potential association between NAFLD and osteoporosis and focuses on treatment considerations derived from this potential association.
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Affiliation(s)
- Ilias D Vachliotis
- First Laboratory of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
- Department of Endocrinology, 424 General Military Hospital, Thessaloniki, Greece
| | | | - Antonis Goulas
- First Laboratory of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimitrios G Goulis
- Unit of Reproductive Endocrinology, First Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Stergios A Polyzos
- First Laboratory of Pharmacology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Tao Y, Jiang Q, Wang Q. Adipose tissue macrophages in remote modulation of hepatic glucose production. Front Immunol 2022; 13:998947. [PMID: 36091076 PMCID: PMC9449693 DOI: 10.3389/fimmu.2022.998947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 08/03/2022] [Indexed: 11/16/2022] Open
Abstract
Hepatic glucose production (HGP) is fine-regulated via glycogenolysis or gluconeogenesis to maintain physiological concentration of blood glucose during fasting-feeding cycle. Aberrant HGP leads to hyperglycemia in obesity-associated diabetes. Adipose tissue cooperates with the liver to regulate glycolipid metabolism. During these processes, adipose tissue macrophages (ATMs) change their profiles with various physio-pathological settings, producing diverse effects on HGP. Here, we briefly review the distinct phenotypes of ATMs under different nutrition states including feeding, fasting or overnutrition, and detail their effects on HGP. We discuss several pathways by which ATMs regulate hepatic gluconeogenesis or glycogenolysis, leading to favorable or unfavorable metabolic consequences. Furthermore, we summarize emerging therapeutic targets to correct metabolic disorders in morbid obesity or diabetes based on ATM-HGP axis. This review puts forward the importance and flexibility of ATMs in regulating HGP, proposing ATM-based HGP modulation as a potential therapeutic approach for obesity-associated metabolic dysfunction.
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Nagasaki K, Gavrilova O, Hajishengallis G, Somerman MJ. Does the RGD region of certain proteins affect metabolic activity? FRONTIERS IN DENTAL MEDICINE 2022. [DOI: 10.3389/fdmed.2022.974862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A better understanding of the role of mineralized tissues and their associated factors in governing whole-body metabolism should be of value toward informing clinical strategies to treat mineralized tissue and metabolic disorders, such as diabetes and obesity. This perspective provides evidence suggesting a role for the arginine-glycine-aspartic acid (RGD) region, a sequence identified in several proteins secreted by bone cells, as well as other cells, in modulating systemic metabolic activity. We focus on (a) two of the SIBLING (small integrin-binding ligand, N-linked glycoprotein) family genes/proteins, bone sialoprotein (BSP) and osteopontin (OPN), (b) insulin-like growth factor-binding protein-1 & 2 (IGFBP-1, IGFBP-2) and (c) developmental endothelial locus 1 (DEL1) and milk fat globule–EGF factor-8 (MFG-E8). In addition, for our readers to appreciate the mounting evidence that a multitude of bone secreted factors affect the activity of other tissues, we provide a brief overview of other proteins, to include fibroblast growth factor 23 (FGF23), phosphatase orphan 1 (PHOSPHO1), osteocalcin (OCN/BGLAP), tissue non-specific alkaline phosphatase (TNAP) and acidic serine aspartic-rich MEPE-associated motif (ASARM), along with known/suggested functions of these factors in influencing energy metabolism.
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Li Y, Wei M, Yuan Q, Liu Y, Tian T, Hou L, Zhang J. MyD88 in hepatic stellate cells promotes the development of alcoholic fatty liver via the AKT pathway. J Mol Med (Berl) 2022; 100:1071-1085. [PMID: 35708745 DOI: 10.1007/s00109-022-02196-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 03/22/2022] [Accepted: 03/28/2022] [Indexed: 10/18/2022]
Abstract
Myeloid differentiation primary response gene 88 (MyD88), an adaptor protein in the Toll-like receptors (TLRs) signalling pathway, is expressed in various liver cells including hepatocytes, Kupffer cells and hepatic stellate cells (HSCs). And yet, the functional role of MyD88 in HSCs is poorly elucidated in alcoholic fatty liver (AFL). Here, to study the functional role of MyD88 in HSCs and the molecular mechanism related to the development of AFL, chronic-binge ethanol mouse models were established in mice with specific MyD88 knockout in quiescent (MyD88GFAP-KO) and activated HSCs (MyD88SMA-KO), respectively. Our results clearly showed an elevated expression of MyD88 in liver tissues of ethanol treated mouse model which harbours the wild type. Intriguingly, ethanol treatment profoundly inhibited inflammation in both MyD88GFAP-KO and MyD88SMA-KO mice, but the suppression of lipogenesis was only observed in MyD88GFAP-KO mice. Molecularly, our study indicated that MyD88 induced osteopontin (OPN) secretion in HSCs, which consequently resulted in activation of AKT signalling pathway and accumulation of fat in hepatocytes. Additionally, our data also suggested that OPN promoted inflammation by activating p-STAT1. Thus, targeting MyD88 may be a potentially represent a promising strategy for the prevention and treatment of AFL. KEY MESSAGES: The expression of MyD88 in HSCs was significantly increased in ethanol-induced liver tissues of wild-type mice. MyD88 deficiency in quiescent HSCs inhibited inflammation and lipogenesis under the ethanol feeding condition. MyD88 deficiency in activated HSCs only inhibited inflammation under the ethanol feeding condition. MyD88 promoted the OPN secretion of HSCs, which further activated the AKT signalling pathway of hepatocytes and upregulated lipogenic gene expression to promote fat accumulation. OPN also promotes inflammation by activating p-STAT1.
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Affiliation(s)
- Yukun Li
- The College of Life Science and Bioengineering, Beijing Jiaotong University, Beijing, People's Republic of China
| | - Miaomiao Wei
- The College of Life Science and Bioengineering, Beijing Jiaotong University, Beijing, People's Republic of China
| | - Qi Yuan
- The College of Life Science and Bioengineering, Beijing Jiaotong University, Beijing, People's Republic of China
| | - Yu Liu
- The College of Life Science and Bioengineering, Beijing Jiaotong University, Beijing, People's Republic of China
| | - Tian Tian
- The College of Life Science and Bioengineering, Beijing Jiaotong University, Beijing, People's Republic of China
| | - Lingling Hou
- The College of Life Science and Bioengineering, Beijing Jiaotong University, Beijing, People's Republic of China.
| | - Jinhua Zhang
- The College of Life Science and Bioengineering, Beijing Jiaotong University, Beijing, People's Republic of China.
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Xiao L, Xu Q, Liu X, Chan S, Luo Y, He S, Fang M. The Novel-miR-659/SPP1 Interaction Regulates Fat Deposition in Castrated Male Pigs. Animals (Basel) 2022; 12:ani12080944. [PMID: 35454191 PMCID: PMC9031235 DOI: 10.3390/ani12080944] [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: 01/28/2022] [Revised: 03/20/2022] [Accepted: 03/31/2022] [Indexed: 11/26/2022] Open
Abstract
Simple Summary Castration is a standard method for eliminating boar taint in industrial hog production, but it also causes enormous fat accumulation in the carcass. Secreted phosphoprotein 1 (SPP1) was selected to investigate its functions on the regulation of adipose deposition based on our previous data. In the present study, SPP1 overexpression and interference bidirectionally verified that SPP1 inhibited adipogenic differentiation of porcine bone marrow mesenchymal stem cells (pBMSCs). Testosterone-treated cell models were used to simulate the androgen status of intact pigs, and testosterone addition influenced SPP1 mRNA levels during the differentiation of pBMSCs. Moreover, we identified novel-miR-659 and targeted the 3′ untranslated region of SPP1 based on bioinformatics analysis and dual-luciferase assays, and found that the novel-miR-659 upregulation promoted adipogenesis while novel-miR-659 downregulation suppressed adipogenesis in pBMSCs detected by Oil Red O staining and adipogenic markers. Collectively, the interaction between novel-miR-659 and SPP1 can regulate adipose accumulation in castrated male pigs. Our data provide a theoretical basis for further study on the fat deposition mechanism caused by castration. Abstract Castration is usually used to remove boar taint in commercial pork production, but the adipose accumulation was increased excessively, which affected the meat quality of pigs. Based on our previous study, secreted phosphoprotein 1 (SPP1) was significantly differentially expressed between castrated and intact male pigs. However, the role of SPP1 in regulating adipose growth and fat storage caused by castration is unknown. In this study, SPP1 was identified to inhibit adipogenesis by the expression of adipogenic markers PPARγ and FABP4 as well as Oil red staining assay during differentiation of porcine bone marrow mesenchymal stem cells (pBMSCs). Subsequently, testosterone was used to treat pBMSCs to simulate the androgen status of intact pigs. Compared with the control groups without testosterone, the SPP1 expression in the testosterone group was markedly increased in the late stage of pBMSCs differentiation. Furthermore, novel-miR-659 was predicted by TargetScan and miRDB to target SPP1 and verified through a dual-luciferase reporter assay. Oil Red O staining assay indicated that novel-miR-659 overexpression significantly promoted adipogenesis, whereas novel-miR-659 inhibition suppressed adipogenesis. The expressions of adipogenic markers PPARγ and FABP4 showed the same tendency. Taken together, our study found that the targeted interaction between novel-miR-659 and SPP1 is involved in regulation of fat deposition in castrated male pigs.
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Affiliation(s)
- Lianmei Xiao
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (L.X.); (Q.X.); (X.L.); (S.C.); (Y.L.); (S.H.)
| | - Qiao Xu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (L.X.); (Q.X.); (X.L.); (S.C.); (Y.L.); (S.H.)
- School of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ximing Liu
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (L.X.); (Q.X.); (X.L.); (S.C.); (Y.L.); (S.H.)
| | - Shuheng Chan
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (L.X.); (Q.X.); (X.L.); (S.C.); (Y.L.); (S.H.)
| | - Yabiao Luo
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (L.X.); (Q.X.); (X.L.); (S.C.); (Y.L.); (S.H.)
| | - Shuaihan He
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (L.X.); (Q.X.); (X.L.); (S.C.); (Y.L.); (S.H.)
| | - Meiying Fang
- Department of Animal Genetics and Breeding, National Engineering Laboratory for Animal Breeding, MOA Laboratory of Animal Genetics and Breeding, Beijing Key Laboratory for Animal Genetic Improvement, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (L.X.); (Q.X.); (X.L.); (S.C.); (Y.L.); (S.H.)
- Sanya Institute of China Agricultural University, Sanya 572025, China
- Correspondence: ; Tel./Fax: +86-10-62734943
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Matrisome alterations in obesity – Adipose tissue transcriptome study on monozygotic weight-discordant twins. Matrix Biol 2022; 108:1-19. [DOI: 10.1016/j.matbio.2022.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 02/16/2022] [Accepted: 02/23/2022] [Indexed: 12/11/2022]
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New insight of obesity-associated NAFLD: Dysregulated “crosstalk” between multi-organ and the liver? Genes Dis 2022. [DOI: 10.1016/j.gendis.2021.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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覃 碧, 刁 娜, 白 岚. [Parathyroid hormone-related protein aggravates nonalcoholic fatty liver disease induced by methionine choline-deficient diet in mice]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2021; 41:1037-1043. [PMID: 34308853 PMCID: PMC8329677 DOI: 10.12122/j.issn.1673-4254.2021.07.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To study the effect of parathyroid hormone-related protein (PTHrP) on nonalcoholic fatty liver disease (NAFLD) induced by methionine choline-deficient diet (MCD) in mice. METHODS Twelve male C57BL/6J mice were randomized into blank control group, vehicle group and PTHrP group (n=4). The mice in vehicle group and PTHrP group received injections of a control adeno-associated virus (AAV) vector and an AVV vector carrying PTHrP (AAV-PTHrP) gene, respectively, followed one week later by MCD feeding for 3 weeks; the mice in the blank control were fed a normal diet for 4 weeks. Body weight changes of the mice were monitored during the experiment. At the end of the experiment, liver tissues were harvested from the mice for histological analysis using HE staining, oil red O staining, and Sirius red staining. The levels of aspartate aminotransferase (AST), alanine aminotransferase (ALT), triglyceride, and free fatty acids (FFAs) in the liver and serum were detected to assess hepatic impairment and lipid metabolism of the mice. Cell models of NAFLD were established in mouse and human normal liver cells by treatment with 250 μmol/L FFAs for 24 h, and the effect of AAV-PTHrP on lipid deposition and viability of the cells were tested using Oil Red O and Nile red staining and CCK8 assay. RESULTS Treatment with AAV-PTHrP, as compared with the control AVV vector, caused more rapid reduction of body weight in mice with MCD feeding and significantly increased the levels of AST (P < 0.05), ALT (P < 0.05), triglyceride (P < 0.01) and FFA (P < 0.05) in the liver and the scores of NAS (P < 0.01) and SAF (P < 0.05). HE and Oil red O staining of the liver tissue revealed obvious lipid deposition after MCD feeding, which was more serious in PTHrP group. In the cell experiment, FFAs induced steatosis in both mouse and human hepatocytes, and treatment with PTHrP increased the accumulation of lipid droplets and lowered the viability of the cell model of NAFLD (P < 0.01 or 0.05). CONCLUSION PTHrP may aggravate MCD-induced NAFLD in mice by promoting the deposition of lipid droplets in the hepatocytes.
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Affiliation(s)
- 碧艳 覃
- 南方医科大学南方医院消化内科广东省胃肠疾病重点实验室,广东 广州 510515Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - 娜 刁
- 中山大学附属第六医院消化内科//广东省结直肠盆底疾病重点实验室,广东 广州 510655Guangdong Provincial Key Laboratory of Colorectal Diseases, Department of Gastroenterology, Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou 510655, China
| | - 岚 白
- 南方医科大学南方医院消化内科广东省胃肠疾病重点实验室,广东 广州 510515Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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He W, Huang C, Zhang X, Wang D, Chen Y, Zhao Y, Li X. Identification of transcriptomic signatures and crucial pathways involved in non-alcoholic steatohepatitis. Endocrine 2021; 73:52-64. [PMID: 33837926 DOI: 10.1007/s12020-021-02716-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 03/25/2021] [Indexed: 02/08/2023]
Abstract
PURPOSE Our study aimed to uncover the crucial genes and functional pathways involved in the development of non-alcoholic steatohepatitis (NASH). METHODS Liver transcriptome datasets were integrated with Robust rank aggregation (RRA) method, and transcriptomic signatures for NASH progression and fibrosis severity in NAFLD were developed. The functions of transcriptomic signatures were explored by multiple bioinformatic analyses, and their diagnostic role was also evaluated. RESULTS RRA analyses of 12 transcriptome datasets comparing NASH with non-alcoholic fatty liver (NAFL) identified 116 abnormally up-regulated genes in NASH patients. RRA analyses of five transcriptome datasets focusing fibrosis severity identified 78 abnormally up-regulated genes in NAFLD patients with advanced fibrosis. The functions of those transcriptomic signatures of NASH development or fibrosis progression were similar, and were both characterized by extracellular matrix (ECM)-related pathways (Adjusted P < 0.05). The transcriptomic signatures could effectively differentiate NASH from NAFL, and could help to identify NAFLD patients with advanced fibrosis. Gene set enrichment analysis and weighted gene co-expression network analysis further validated the key role of ECM-related pathways in NASH development. The top 10 up-regulated genes in NASH patients were SPP1, FBLN5, CHI3L1, CCL20, CD24, FABP4, GPNMB, VCAN, EFEMP1, and CXCL10, and their functions were mainly related to either ECM-related pathways or immunity-related pathways. Single cell RNA-sequencing analyses revealed that those crucial genes were expressed by distinct cells such as hepatocytes, macrophages, and hepatic stellate cells. CONCLUSIONS Transcriptomic signatures related to NASH development and fibrosis severity of NAFLD patients are both characterized by ECM-related pathways, and fibrosis is a main player during NASH progression. This study uncovers some novel key genes involved in NASH progression, which may be promising therapeutic targets.
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Affiliation(s)
- Weiwei He
- School of Medicine, Xiamen University, Xiamen, China
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Caoxin Huang
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Xiaofang Zhang
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Dongmei Wang
- School of Medicine, Xiamen University, Xiamen, China
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Yinling Chen
- School of Medicine, Xiamen University, Xiamen, China
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China
| | - Yan Zhao
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China.
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China.
| | - Xuejun Li
- Xiamen Diabetes Institute, The First Affiliated Hospital of Xiamen University, Xiamen, China.
- Fujian Provincial Key Laboratory of Translational Medicine for Diabetes, Xiamen, China.
- Department of Endocrinology and Diabetes, The First Affiliated Hospital of Xiamen University, Xiamen, China.
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22
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Song Z, Chen W, Athavale D, Ge X, Desert R, Das S, Han H, Nieto N. Osteopontin Takes Center Stage in Chronic Liver Disease. Hepatology 2021; 73:1594-1608. [PMID: 32986864 PMCID: PMC8106357 DOI: 10.1002/hep.31582] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/25/2020] [Accepted: 09/09/2020] [Indexed: 12/13/2022]
Abstract
Osteopontin (OPN) was first identified in 1986. The prefix osteo- means bone; however, OPN is expressed in other tissues, including liver. The suffix -pontin means bridge and denotes the role of OPN as a link protein within the extracellular matrix. While OPN has well-established physiological roles, multiple "omics" analyses suggest that it is also involved in chronic liver disease. In this review, we provide a summary of the OPN gene and protein structure and regulation. We outline the current knowledge on how OPN is involved in hepatic steatosis in the context of alcoholic liver disease and non-alcoholic fatty liver disease. We describe the mechanisms whereby OPN participates in inflammation and liver fibrosis and discuss current research on its role in hepatocellular carcinoma and cholangiopathies. To conclude, we highlight important points to consider when doing research on OPN and provide direction for making progress on how OPN contributes to chronic liver disease.
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Affiliation(s)
- Zhuolun Song
- Department of Pathology, University of Illinois at Chicago, Chicago, IL
| | - Wei Chen
- Department of Pathology, University of Illinois at Chicago, Chicago, IL
| | - Dipti Athavale
- Department of Pathology, University of Illinois at Chicago, Chicago, IL
| | - Xiaodong Ge
- Department of Pathology, University of Illinois at Chicago, Chicago, IL
| | - Romain Desert
- Department of Pathology, University of Illinois at Chicago, Chicago, IL
| | - Sukanta Das
- Department of Pathology, University of Illinois at Chicago, Chicago, IL
| | - Hui Han
- Department of Pathology, University of Illinois at Chicago, Chicago, IL
| | - Natalia Nieto
- Department of Pathology, University of Illinois at Chicago, Chicago, IL,Department of Medicine, Division of Gastroenterology and Hepatology, University of Illinois at Chicago, Chicago, IL
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23
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Osteopontin's relationship with malnutrition and oxidative stress in adolescents. A pilot study. PLoS One 2021; 16:e0249057. [PMID: 33765028 PMCID: PMC7993823 DOI: 10.1371/journal.pone.0249057] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 03/10/2021] [Indexed: 01/24/2023] Open
Abstract
Osteopontin (OPN) is a protein involved in inflammatory illnesses such as fibrosis and cancer; its overexpression in cardiovascular diseases promotes the biomineralization of blood vessels and other soft tissues. Moreover, there is an active component of oxidative stress related with those diseases. The present study relates serum OPN levels with nutritional condition and oxidative stress in a group of adolescents. Anthropometric measurements were performed, and fasting blood samples were analyzed to determine OPN concentrations, blood chemistry parameters (glucose, triglycerides, total cholesterol, urea, uric acid, and creatinine) and oxidative stress biomarkers (Paraoxonase-1, Glutathione S-Transferase, Catalase, NAD(P)H Quinone Oxidoreductase, free carbonyl groups and malondialdehyde). Adolescents were categorized according to body mass index (BMI) and metabolic syndrome (MetS) criteria. We found increased OPN serum concentrations in overweight and obese adolescents, as well as in adolescents with MetS. Rises in OPN correlated with arm circumference and biomarkers of lipid peroxidation; with regard to serum glucose there was a trend to positive correlation. Our results suggest that serum OPN is associated to nutritional status and could be considered as an early biomarker of low-grade inflammation and probably the early biomineralization of soft tissues in adolescence.
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24
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Gómez‐Santos B, Saenz de Urturi D, Nuñez‐García M, Gonzalez‐Romero F, Buque X, Aurrekoetxea I, Gutiérrez de Juan V, Gonzalez‐Rellan MJ, García‐Monzón C, González‐Rodríguez Á, Mosteiro L, Errazti G, Mifsut P, Gaztambide S, Castaño L, Martin C, Nogueiras R, Martinez‐Chantar ML, Syn W, Aspichueta P. Liver osteopontin is required to prevent the progression of age-related nonalcoholic fatty liver disease. Aging Cell 2020; 19:e13183. [PMID: 32638492 PMCID: PMC7431823 DOI: 10.1111/acel.13183] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 04/14/2020] [Accepted: 06/06/2020] [Indexed: 12/17/2022] Open
Abstract
Osteopontin (OPN), a senescence-associated secretory phenotype factor, is increased in patients with nonalcoholic fatty liver disease (NAFLD). Cellular senescence has been associated with age-dependent hepatosteatosis. Thus, we investigated the role of OPN in the age-related hepatosteatosis. For this, human serum samples, animal models of aging, and cell lines in which senescence was induced were used. Metabolic fluxes, lipid, and protein concentration were determined. Among individuals with a normal liver, we observed a positive correlation between serum OPN levels and increasing age. This correlation with age, however, was absent in patients with NAFLD. In wild-type (WT) mice, serum and liver OPN were increased at 10 months old (m) along with liver p53 levels and remained elevated at 20m. Markers of liver senescence increased in association with synthesis and concentration of triglycerides (TG) in 10m OPN-deficient (KO) hepatocytes when compared to WT hepatocytes. These changes in senescence and lipid metabolism in 10m OPN-KO mice liver were associated with the decrease of 78 kDa glucose-regulated protein (GRP78), induction of ER stress, and the increase in fatty acid synthase and CD36 levels. OPN deficiency in senescent cells also diminished GRP78, the accumulation of intracellular TG, and the increase in CD36 levels. In 20m mice, OPN loss led to increased liver fibrosis. Finally, we showed that OPN expression in vitro and in vivo was regulated by p53. In conclusion, OPN deficiency leads to earlier cellular senescence, ER stress, and TG accumulation during aging. The p53-OPN axis is required to inhibit the onset of age-related hepatosteatosis.
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Affiliation(s)
- Beatriz Gómez‐Santos
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
| | - Diego Saenz de Urturi
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
| | - Maitane Nuñez‐García
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
| | - Francisco Gonzalez‐Romero
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
| | - Xabier Buque
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
| | - Igor Aurrekoetxea
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
| | - Virginia Gutiérrez de Juan
- Liver Disease Lab, Center for Cooperative Research in Bioscience (CIC bioGUNE), Basque Research and Technology Alliance (BRTA) e Derio Bizkaia Spain
| | - Maria J. Gonzalez‐Rellan
- Department of Physiology CIMUS University of Santiago de Compostela‐Instituto de Investigación Sanitaria Santiago de Compostela Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn) Madrid Spain
| | - Carmelo García‐Monzón
- Liver Research Unit Santa Cristina University Hospital Instituto de Investigación Sanitaria Princesa Madrid Spain
- Centro de investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Carlos III National Health Institute Madrid Spain
| | - Águeda González‐Rodríguez
- Liver Research Unit Santa Cristina University Hospital Instituto de Investigación Sanitaria Princesa Madrid Spain
- Centro de investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Carlos III National Health Institute Madrid Spain
| | - Lorena Mosteiro
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
| | - Gaizka Errazti
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
| | - Patricia Mifsut
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
| | - Sonia Gaztambide
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
| | - Luis Castaño
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
| | - Cesar Martin
- Department of Biochemistry and Molecular Biology Biofisika Institute (UPV/EHU, CSIC) UPV/EHU Spain
| | - Rubén Nogueiras
- Department of Physiology CIMUS University of Santiago de Compostela‐Instituto de Investigación Sanitaria Santiago de Compostela Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn) Madrid Spain
| | - María L. Martinez‐Chantar
- Liver Disease Lab, Center for Cooperative Research in Bioscience (CIC bioGUNE), Basque Research and Technology Alliance (BRTA) e Derio Bizkaia Spain
- Centro de investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Carlos III National Health Institute Madrid Spain
| | - Wing‐Kin Syn
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
- Section of Gastroenterology Ralph H Johnson VAMC Charleston SC USA
- Division of Gastroenterology and Hepatology Medical University of South Carolina Charleston SC USA
| | - Patricia Aspichueta
- Department of Physiology Faculty of Medicine and Nursing University of Basque Country UPV/EHU Leioa Spain
- Biocruces Bizkaia Health Research Institute Cruces University Hospital Barakaldo Spain
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25
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Nardo AD, Grün NG, Zeyda M, Dumanic M, Oberhuber G, Rivelles E, Helbich TH, Markgraf DF, Roden M, Claudel T, Trauner M, Stulnig TM. Impact of osteopontin on the development of non-alcoholic liver disease and related hepatocellular carcinoma. Liver Int 2020; 40:1620-1633. [PMID: 32281248 PMCID: PMC7384114 DOI: 10.1111/liv.14464] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 02/14/2020] [Accepted: 03/31/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS Osteopontin, a multifunctional protein and inflammatory cytokine, is overexpressed in adipose tissue and liver in obesity and contributes to the induction of adipose tissue inflammation and non-alcoholic fatty liver (NAFL). Studies performed in both mice and humans also point to a potential role for OPN in malignant transformation and tumour growth. To fully understand the role of OPN on the development of NAFL-derived hepatocellular carcinoma (HCC), we applied a non-alcoholic steatohepatitis (NASH)-HCC mouse model on osteopontin-deficient (Spp1-/- ) mice analysing time points of NASH, fibrosis and HCC compared to wild-type mice. METHODS Two-day-old wild-type and Spp1-/- mice received a low-dose streptozotocin injection in order to induce diabetes, and were fed a high-fat diet starting from week 4. Different cohorts of mice of both genotypes were sacrificed at 8, 12 and 19 weeks of age to evaluate the NASH, fibrosis and HCC phenotypes respectively. RESULTS Spp1-/- animals showed enhanced hepatic lipid accumulation and aggravated NASH, as also increased hepatocellular apoptosis and accelerated fibrosis. The worse steatotic and fibrotic phenotypes observed in Spp1-/- mice might be driven by enhanced hepatic fatty acid influx through CD36 overexpression and by a pathological accumulation of specific diacylglycerol species during NAFL. Lack of osteopontin lowered systemic inflammation, prevented HCC progression to less differentiated tumours and improved overall survival. CONCLUSIONS Lack of osteopontin dissociates NASH-fibrosis severity from overall survival and HCC malignant transformation in NAFLD, and is therefore a putative therapeutic target only for advanced chronic liver disease.
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Affiliation(s)
- Alexander D. Nardo
- Christian Doppler Laboratory for Cardio‐Metabolic Immunotherapy and Clinical Division of Endocrinology and MetabolismDepartment of Medicine IIIMedical University of ViennaViennaAustria,Present address:
Hans Popper Laboratory of Molecular HepatologyDivision of Gastroenterology & HepatologyMedical University of ViennaVienna1090Austria
| | - Nicole G. Grün
- Christian Doppler Laboratory for Cardio‐Metabolic Immunotherapy and Clinical Division of Endocrinology and MetabolismDepartment of Medicine IIIMedical University of ViennaViennaAustria
| | - Maximilian Zeyda
- Christian Doppler Laboratory for Cardio‐Metabolic Immunotherapy and Clinical Division of Endocrinology and MetabolismDepartment of Medicine IIIMedical University of ViennaViennaAustria,Department of Pediatrics and Adolescent MedicineMedical University of ViennaViennaAustria
| | - Monika Dumanic
- Division of Nuclear MedicineDepartment of Biomedical Imaging and Image‐guided TherapyMedical University of ViennaViennaAustria
| | - Georg Oberhuber
- Department of PathologyGeneral Hospital of InnsbruckInnsbruckAustria
| | - Elisa Rivelles
- Department of Laboratory MedicineMedical University of ViennaViennaAustria
| | - Thomas H. Helbich
- Division of Nuclear MedicineDepartment of Biomedical Imaging and Image‐guided TherapyMedical University of ViennaViennaAustria,Division of Molecular and Gender ImagingDepartment of Biomedical Imaging and Image‐guided TherapyMedical University of ViennaViennaAustria
| | - Daniel F. Markgraf
- German Diabetes CenterLeibniz Center for Diabetes ResearchInstitute for Clinical DiabetologyHeinrich Heine UniversityDüsseldorfGermany
| | - Michael Roden
- German Diabetes CenterLeibniz Center for Diabetes ResearchInstitute for Clinical DiabetologyHeinrich Heine UniversityDüsseldorfGermany,German Center of Diabetes Research (DZD e.V.)München‐NeuherbergGermany,Division of Endocrinology and DiabetologyMedical FacultyHeinrich‐Heine UniversityDüsseldorfGermany
| | - Thierry Claudel
- Hans Popper Laboratory of Molecular HepatologyDivision of Gastroenterology & HepatologyMedical University of ViennaViennaAustria
| | - Michael Trauner
- Hans Popper Laboratory of Molecular HepatologyDivision of Gastroenterology & HepatologyMedical University of ViennaViennaAustria
| | - Thomas M. Stulnig
- Christian Doppler Laboratory for Cardio‐Metabolic Immunotherapy and Clinical Division of Endocrinology and MetabolismDepartment of Medicine IIIMedical University of ViennaViennaAustria,Present address:
Third Department of Medicine and Karl Landsteiner Institute for Metabolic Diseases and NephrologyHietzing HospitalVienna1130Austria
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26
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Tang M, Jiang Y, Jia H, Patpur BK, Yang B, Li J, Yang C. Osteopontin acts as a negative regulator of autophagy accelerating lipid accumulation during the development of nonalcoholic fatty liver disease. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2020; 48:159-168. [PMID: 31852298 DOI: 10.1080/21691401.2019.1699822] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Accumulating evidence links osteopontin (OPN), a pro-fibrogenic extracellular matrix protein, to the pathogenesis of non-alcoholic fatty liver disease (NAFLD). In this study, liver tissues isolated from non-alcoholic steatohepatitis (NASH) patients expressed higher OPN than those of controls. However, the exact mechanism(s) for this phenomenon is yet to be clarified. Autophagy is the natural, regulated degradation and recycling of a cell's dysfunctional components, in order to maintain homeostasis. Increasing evidence supports that autophagy can constitute an effective Defence mechanism against NAFLD conditions. Herein, we constructed NAFLD mice model by high-fat (HF) and methionine-choline-deficient (MCD) diet and found that OPN is upregulated in livers of NAFLD mice. Besides, secreted OPN inhibited autophagosome-lysosome fusion via binding with its receptors integrin αVβ3 and αVβ5 in HepG2 cells supplemented with free fatty acids (FFA) and the livers of NAFLD mice. Silencing of OPN attenuated autophagy impairment and reduced lipid accumulation, while supplementation of OPN exhibited the opposite effect. Furthermore, treatment with anti-OPN Ab significantly attenuated steatosis as well as autophagy impairment in the liver. Our findings indicated that OPN plays a vital role in the pathogenesis of the development of NAFLD via autophagy impairment, which might represent a potential new therapeutic target for the treatment of NAFLD.
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Affiliation(s)
- Min Tang
- Division of Gastroenterology and Hepatology, Institution of Digestive Diseases, Tongji Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Yan Jiang
- Division of Gastroenterology and Hepatology, Institution of Digestive Diseases, Tongji Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Haoyu Jia
- Division of Gastroenterology and Hepatology, Institution of Digestive Diseases, Tongji Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Bhuvanesh Kinish Patpur
- Division of Gastroenterology and Hepatology, Institution of Digestive Diseases, Tongji Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Bo Yang
- Division of Gastroenterology and Hepatology, Institution of Digestive Diseases, Tongji Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Jing Li
- Division of Gastroenterology and Hepatology, Institution of Digestive Diseases, Tongji Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Changqing Yang
- Division of Gastroenterology and Hepatology, Institution of Digestive Diseases, Tongji Hospital, Tongji University School of Medicine, Shanghai, P. R. China
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27
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Wu J, Wu D, Zhang L, Lin C, Liao J, Xie R, Li Z, Wu S, Liu A, Hu W, Xi Y, Bu S, Wang F. NK cells induce hepatic ER stress to promote insulin resistance in obesity through osteopontin production. J Leukoc Biol 2019; 107:589-596. [PMID: 31829469 DOI: 10.1002/jlb.3ma1119-173r] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 12/21/2022] Open
Abstract
High-fat diet (HFD) induced hepatic endoplasmic reticulum (ER) stress drives insulin resistance (IR) and steatosis. NK cells in adipose tissue play an important role in the pathogenesis of IR in obesity. Whether NK cells in the liver can induce hepatic ER stress and thus promote IR in obesity is still unknown. We demonstrate that HFD-fed mice display elevated production of proinflammatory cytokine osteopontin (OPN) in hepatic NK cells, especially in CD49a+ DX5- tissue-resident NK (trNK) cells. Obesity-induced ER stress, IR, and steatosis in the liver are ameliorated by ablating NK cells with neutralizing antibody in HFD-fed mice. OPN treatment enhances the expression of ER stress markers, including p-PERK, p-eIF2, ATF4, and CHOP in both murine liver tissues and HL-7702, a human liver cell line. Pretreatment of HL-7702 cells with OPN promotes hyperactivation of JNK and subsequent decrease of tyrosine phosphorylation of insulin receptor substrate-1 (IRS-1), resulting in impaired insulin signaling, which can be reversed by inhibiting ER stress. Collectively, we demonstrate that hepatic NK cells induce obesity-induced hepatic ER stress, and IR through OPN production.
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Affiliation(s)
- Junhua Wu
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China.,Ningbo Women and Children's Hospital, Ningbo, China
| | - Danyang Wu
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Longyao Zhang
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Chuxuan Lin
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Jiahao Liao
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Ruyin Xie
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Zhulin Li
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Siyang Wu
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Aimin Liu
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Weining Hu
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Yang Xi
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Shizhong Bu
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
| | - Fuyan Wang
- Diabetes Research Center, Medical School of Ningbo University, Ningbo, China
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28
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NAFLD and Extra-Hepatic Comorbidities: Current Evidence on a Multi-Organ Metabolic Syndrome. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16183415. [PMID: 31540048 PMCID: PMC6765902 DOI: 10.3390/ijerph16183415] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/06/2019] [Accepted: 09/08/2019] [Indexed: 02/06/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most common cause of chronic liver disease worldwide and its incidence is definitely increasing. NAFLD is a metabolic disease with extensive multi-organ involvement, whose extra-hepatic manifestations include type 2 diabetes mellitus, cardiovascular disease, obstructive sleep apnea, chronic kidney disease, osteoporosis, and polycystic ovarian syndrome. Recently, further evidence has given attention to pathological correlations not strictly related to metabolic disease, also incorporating in this broad spectrum of systemic involvement hypothyroidism, psoriasis, male sexual dysfunction, periodontitis, and urolithiasis. The most common cause of mortality in NAFLD is represented by cardiovascular disease, followed by liver-related complications. Therefore, clinicians should learn to screen and initiate treatment for these extra-hepatic manifestations, in order to provide appropriate multidisciplinary assessments and rigorous surveillance. This review evaluates the current evidence regarding extra-hepatic associations of NAFLD, focusing on the pathogenic hypothesis and the clinical implications.
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29
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Wang C, He M, Peng J, Li S, Long M, Chen W, Liu D, Yang G, Zhang L. Increased plasma osteopontin levels are associated with nonalcoholic fatty liver disease in patients with type 2 diabetes mellitus. Cytokine 2019; 125:154837. [PMID: 31514105 DOI: 10.1016/j.cyto.2019.154837] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/27/2019] [Accepted: 09/03/2019] [Indexed: 12/29/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) commonly occurs in patients with type 2 diabetes mellitus (T2DM). Osteopontin (OPN) is a multifunctional protein with pleiotropic physiological functions. This study aimed to investigate the interrelation between circulating OPN and NAFLD in T2DM patients. Overall, 249 subjects were classified into 4 groups: 53 patients with NAFLD and T2DM; 57 with newly diagnosed T2DM; 59 with NAFLD; and 80 healthy age- and sex-matched controls. Serum OPN was measured by ELISA. The OPN distribution in the pooled data was divided into quartiles; significant trends across increasing quartiles were estimated by the Cochran-Armitage trend test. Compared with the controls, circulating OPN concentrations were significantly elevated in NAFLD patients and T2DM patients with or without NAFLD. Serum OPN levels were higher in the overweight/obese group than that in the lean group. Circulating OPN levels were positively correlated with CRP, age, BMI, SBP, DBP, HbA1c, UA, TGs, WBCs, neutrophils, FBG, and HOMA-IR and negatively correlated with ADP, albumin and HDL. Age, albumin, HbA1c, HDL and hsCRP were independently related to circulating OPN. The relative risks for NAFLD, T2DM and T2DM with NAFLD increased significantly along with increasing OPN quartiles based on the Cochran-Armitage trend test. OPN is an optimal predictor in the diagnosis of T2DM with NAFLD and T2DM and may contribute to the aggravation of the metabolic state.
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Affiliation(s)
- Cong Wang
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Miao He
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Jiajia Peng
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Shengbing Li
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Min Long
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Wenwen Chen
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Dongfang Liu
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Gangyi Yang
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China
| | - Lili Zhang
- Department of Endocrinology, The Second Affiliated Hospital, Chongqing Medical University, 400010 Chongqing, China.
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Barchetta I, Ceccarelli V, Cimini FA, Bertoccini L, Fraioli A, Alessandri C, Lenzi A, Baroni MG, Cavallo MG. Impaired bone matrix glycoprotein pattern is associated with increased cardio-metabolic risk profile in patients with type 2 diabetes mellitus. J Endocrinol Invest 2019; 42:513-520. [PMID: 30132286 DOI: 10.1007/s40618-018-0941-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 08/09/2018] [Indexed: 12/12/2022]
Abstract
PURPOSE Osteopontin (OPN), osteoprotegerin (OPG) and osteocalcin (OC) are matrix glycoproteins which mediate bone mineralization; moreover, their effects on glucose/insulin homeostasis have recently been demonstrated. Higher circulating OPN and OPG levels have been associated with the presence of insulin resistance, atherosclerosis and coronary heart disease. No data are available on contextual changes of these markers in type 2 diabetes mellitus (T2DM). Therefore, aims of this study were to evaluate serum OPN, OPG and OC levels in T2DM patients and their clinical correlates. METHODS We recruited 83 consecutive T2DM patients referring to our diabetes outpatient clinics at Sapienza, University of Rome, and 71 non-diabetic sex and age-comparable subjects as a control group. Study population underwent metabolic characterization and carotid ultrasound for intima-media thickness measurement. Plasma OPN, OPG and OC were measured by MILLIPLEX Multiplex Assays Luminex. RESULTS T2DM patients had significantly higher circulating OPN and OPG levels than controls (14.3 ± 13.6 vs 10.6 ± 13.7 ng/ml p < 0.001, 0.70 ± 0.60 vs 0.54 ± 4.1 ng/ml, p = 0.02) while OC levels were similar in the two cohorts (6.35 ± 5.8 vs 7.80 ± 7.0 ng/ml, p = n.s). OPN and OPG positively correlated with greater systolic blood pressure (SBP) values, HOMA-IR and HOMA-β, and with the presence of dyslipidemia and carotid atherosclerosis. The association between greater OPN and OPG levels and SBP was independent from possible confounders (both p = 0.01). CONCLUSIONS Circulating OPN and OPG levels are increased in T2DM patients and identify a particularly unfavourable metabolic profile, mostly expressed by higher SBP. Bone peptides may represent novel markers of vascular stress and accelerated atherosclerosis in diabetes, constituting a possible tool for cardiovascular risk stratification in diabetes.
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Affiliation(s)
- I Barchetta
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Rome, Italy
| | - V Ceccarelli
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Rome, Italy
| | - F A Cimini
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Rome, Italy
| | - L Bertoccini
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Rome, Italy
| | - A Fraioli
- Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - C Alessandri
- Department of Internal Medicine and Medical Specialties, Sapienza University of Rome, Rome, Italy
| | - A Lenzi
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Rome, Italy
| | - M G Baroni
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Rome, Italy
| | - M G Cavallo
- Department of Experimental Medicine, Section of Medical Pathophysiology, Food Science and Endocrinology, Sapienza University of Rome, Rome, Italy.
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31
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Obesity-Induced Methylation of Osteopontin Contributes to Adipogenic Differentiation of Adipose-Derived Mesenchymal Stem Cells. Stem Cells Int 2019; 2019:1238153. [PMID: 30911298 PMCID: PMC6398038 DOI: 10.1155/2019/1238153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 02/25/2018] [Accepted: 09/24/2018] [Indexed: 01/21/2023] Open
Abstract
Obesity is a major risk factor for many chronic diseases, including diabetes, fatty livers, and cancer. Expansion of the adipose mass has been shown to be related to adipogenic differentiation of adipose-derived mesenchymal stem cells (ASCs). However, the underlying mechanism of this effect has yet to be elucidated. We found that osteopontin (OPN) is downregulated in ASCs and adipose tissues of obese mice and overweight human beings because of methylation on its promoter, indicating that OPN may affect the development of obesity. Silencing of OPN in wild-type ASCs promotes adipogenic differentiation, while reexpression of OPN reduced adipogenic differentiation in OPN−/− ASCs. The role of extracellular OPN in ASC differentiation was further demonstrated by supplementation and neutralization of OPN. Additionally, OPN suppresses adipogenic differentiation in ASCs through the C/EBP pathways. Consistent with these in vitro results, by intravenous injection of OPN-expressing adenovirus to the mice, we found OPN can delay the development of obesity and improve insulin sensitivity. Therefore, our study demonstrates an important role of OPN in regulating the development of obesity, indicating OPN might be a novel target to attenuate obesity and its complications.
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32
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Shi J, Fan J, Su Q, Yang Z. Cytokines and Abnormal Glucose and Lipid Metabolism. Front Endocrinol (Lausanne) 2019; 10:703. [PMID: 31736870 PMCID: PMC6833922 DOI: 10.3389/fendo.2019.00703] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 09/30/2019] [Indexed: 12/20/2022] Open
Abstract
Clear evidence indicates that cytokines, for instance, adipokines, hepatokines, inflammatory cytokines, myokines, and osteokines, contribute substantially to the development of abnormal glucose and lipid metabolism. Some cytokines play a positive role in metabolism action, while others have a negative metabolic role linking to the induction of metabolic dysfunction. The mechanisms involved are not fully understood, but are associated with lipid accumulation in organs and tissues, especially in the adipose and liver tissue, changes in energy metabolism, and inflammatory signals derived from various cell types, including immune cells. In this review, we describe the roles of certain cytokines in the regulation of metabolism and inter-organ signaling in regard to the pathophysiological aspects. Given the disease-related changes in circulating levels of relevant cytokines, these factors may serve as biomarkers for the early detection of metabolic disorders. Moreover, based on preclinical studies, certain cytokines that can induce improvements in glucose and lipid metabolism and immune response may emerge as novel targets of broader and more efficacious treatments and prevention of metabolic disease.
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Affiliation(s)
- Jie Shi
- Department of Endocrinology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jiangao Fan
- Shanghai Key Laboratory of Children's Digestion and Nutrition, Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Qing Su
- Department of Endocrinology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- *Correspondence: Qing Su
| | - Zhen Yang
- Department of Endocrinology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Zhen Yang
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Filip R, Radzki RP, Bieńko M. Novel insights into the relationship between nonalcoholic fatty liver disease and osteoporosis. Clin Interv Aging 2018; 13:1879-1891. [PMID: 30323574 PMCID: PMC6174895 DOI: 10.2147/cia.s170533] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Excess fat deposition and insulin resistance are considered the main risk factors for nonalcoholic fatty liver disease (NAFLD), and therefore, not surprisingly, the global prevalence of NAFLD increases in parallel with both obesity and type 2 diabetes. Although deterioration of bone homeostasis in patients with NAFLD is commonly observed, its etiology has not been fully elucidated yet. It was shown in several studies that bone tissue seems to be independently associated with NAFLD. A mechanistic perspective puts the liver at the center of mutual interdependencies obviously involving adipose tissue and muscles and also the bone matrix and bone cells, which are relatively novel. In this review, various pathophysiological mechanisms and possible mediating molecules that may interplay between NAFLD and bone tissue are described. Chronic inflammation, vitamin D3, growth hormone, insulin-like growth factor 1, osteopontin, fetuin-A, irisin, osteocalcin, and osteoprotegerin from osteoblasts have been proposed as mediators of mutual interactions among the skeleton, fatty tissue, and liver. Although to date there are still many issues that have not been elucidated, growing evidence suggests that screening and surveillance of bone mineral density in patients with NAFLD should be considered in future strategies and guidelines for NAFLD management.
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Affiliation(s)
- Rafał Filip
- Department of Gastroenterology with IBD Unit, Clinical Hospital 2, Rzeszów, Poland,
- University of Rzeszów, Rzeszów, Poland,
| | - Radosław P Radzki
- Department of Animal Physiology, University of Life Sciences, Lublin, Poland
| | - Marek Bieńko
- Department of Animal Physiology, University of Life Sciences, Lublin, Poland
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34
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Wang Y, Zhou W, Wu C, Zhang Y, Lin T, Sun Y, Liu W, Tao T. Circulating osteopontin and its association with liver fat content in non-obese women with polycystic ovary syndrome: a case control study. Reprod Biol Endocrinol 2018; 16:31. [PMID: 29587769 PMCID: PMC5870073 DOI: 10.1186/s12958-018-0331-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Accepted: 02/06/2018] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Osteopontin (OPN) plays an important role in inflammatory processes and insulin resistance. Polycystic ovary syndrome (PCOS) is a reproductive metabolic disease associated with insulin resistance and metabolic abnormalities, including high levels of liver fat content (LFC). The objective of this study was to explore whether circulating OPN independently contributes to elevated LFC in non-obese PCOS patients. METHODS This study included 61 non-obese PCOS patients and 56 age-matched healthy women from Shanghai, China. After an overnight fast, all participants underwent anthropometric measurements, oral glucose tolerance tests, lipid profile and sex hormone measurements. Quantitative measurement of LFC by ultrasonography was performed. OPN concentrations were measured using ELISA. An independent samples t-test and the Mann-Whitney U test were performed to compare variables between the two groups; one-way ANOVA and Kruskal-Wallis test were performed to compare four subgroups of patients. Correlations were determined by Spearman's correlation tests. Stepwise multiple linear regression analyses were performed to assess for independent contributors. A receiver operating characteristic curve with the maximum Youden index was calculated for the optimal cut-off value. RESULTS In non-obese PCOS women, circulating OPN levels were increased in the subgroups with a higher body mass index (BMI) and free androgen index (FAI), and the LFC levels were increased in the elevated OPN subgroups. Moreover, increased OPN was associated with increased FAI and LFC in PCOS women, and the association between OPN and LFC was independent of triglyceride, HOMA-IR and FAI after adjusting for PCOS status in all participants. OPN combined with FAI and hsCRP may better predict NAFLD than WHR in this study cohort. However, there was no significant difference in circulating OPN levels between non-obese PCOS and normal control women. CONCLUSIONS Increased OPN levels may be related to FAI and elevated LFC in non-obese women with PCOS.
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Affiliation(s)
- Yuying Wang
- Department of Endocrinology and Metabolism, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Wei Zhou
- Department of Emergency, South Campus, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Chunhua Wu
- Division of Ultrasonography, Department of Radiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Yi Zhang
- Department of Endocrinology and Metabolism, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Tzuchun Lin
- Department of Endocrinology and Metabolism, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Yun Sun
- Shanghai Key laboratory for Assisted Reproduction and Reproductive Genetics, Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China
| | - Wei Liu
- Department of Endocrinology and Metabolism, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China.
- Shanghai Key laboratory for Assisted Reproduction and Reproductive Genetics, Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China.
| | - Tao Tao
- Department of Endocrinology and Metabolism, Renji Hospital, School of Medicine, Shanghai Jiaotong University, 160 Pujian Road, Shanghai, 200127, China.
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35
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Moreno-Viedma V, Tardelli M, Zeyda M, Sibilia M, Burks JD, Stulnig TM. Osteopontin-deficient progenitor cells display enhanced differentiation to adipocytes. Obes Res Clin Pract 2018. [PMID: 29519755 DOI: 10.1016/j.orcp.2018.02.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVE Osteopontin (OPN, Spp1) is a protein upregulated in white adipose tissue (WAT) of obese subjects. Deletion of OPN protects mice from high-fat diet-induced WAT inflammation and insulin resistance. However, the alterations mediated by loss of OPN in WAT before the obesogenic challenge have not yet been investigated. Therefore, we hypothesised that the lack of OPN might enhance the pro-adipogenic micro environment before obesity driven inflammation. METHODS OPN deficiency was tested in visceral (V) and subcutaneous (SC) WAT from WT and Spp1-/- female mice. Gene expression for hypoxia, inflammation and adipogenesis was checked in WT vs. Spp1-/- mice (n=15). Adipocytes progenitor cells (APC) were isolated by fluorescence cell sorting and role of OPN deficiency in adipogenesis was investigated by cell images and RT-PCR. RESULTS We show that Spp1-/- maintained normal body and fat-pad weights, although hypoxia and inflammation markers were significantly reduced. In contrast, expression of genes involved in adipogenesis was increased in WAT from Spp1-/- mice. Strikingly, APC from Spp1-/- were diminished but differentiated more efficiently to adipocytes than those from control mice. CONCLUSIONS APC from SC-WAT of lean OPN-deficient mice display an enhanced capacity for differentiating to adipocytes. These alterations may explain the healthy expansion of WAT in the OPN-deficient model which is associated with reduced inflammation and insulin resistance.
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Affiliation(s)
- Veronica Moreno-Viedma
- CIBER de Diabetes y Enfermedades Metabólicas, Spain; Centro de Investigación Príncipe Felipe, Valencia, Spain; Christian Doppler-Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Internal Medicine III, Medical University of Vienna, Austria; Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Borschkegasse 8a, Vienna, Austria
| | - Matteo Tardelli
- Christian Doppler-Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Internal Medicine III, Medical University of Vienna, Austria; Hans Popper Laboratory of Molecular Hepatology, Division of Gastroenterology and Hepatology, Internal Medicine III, Medical University of Vienna, Austria
| | - Maximilian Zeyda
- Christian Doppler-Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Internal Medicine III, Medical University of Vienna, Austria; Department of Pediatrics and Adolescent Medicine, Clinical Division of Pediatric Pulmonology, Allergology and Endocrinology, Medical University of Vienna, Austria
| | - Maria Sibilia
- Institute of Cancer Research, Department of Medicine I, Comprehensive Cancer Center, Medical University of Vienna, Borschkegasse 8a, Vienna, Austria
| | - J Deborah Burks
- CIBER de Diabetes y Enfermedades Metabólicas, Spain; Centro de Investigación Príncipe Felipe, Valencia, Spain
| | - Thomas M Stulnig
- Christian Doppler-Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Internal Medicine III, Medical University of Vienna, Austria.
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36
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Sanchez-Gonzalez C, Moreno L, Lopez-Chaves C, Nebot E, Pietschmann P, Rodriguez-Nogales A, Galvez J, Montes-Bayon M, Sanz-Medel A, Llopis J. Effect of vanadium on calcium homeostasis, osteopontin mRNA expression, and bone microarchitecture in diabetic rats. Metallomics 2017; 9:258-267. [PMID: 28194470 DOI: 10.1039/c6mt00272b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this study was to examine whether alterations caused by diabetes in calcium homeostasis, expression of osteopontin and the microarchitecture of bone are corrected by exposure to vanadium. Four study groups were examined over a period of five weeks: control (C), diabetic (DM), diabetic treated with 1 mg V per d (DMV), and diabetic treated with 3 mg V per d (DMVH). Vanadium was supplied in drinking water as bis(maltolato)oxovanadium(iv). Calcium was measured in the food, faeces, urine, serum, kidneys, liver, muscles, and femur. Osteopontin gene expression was determined in the liver, and the bone microarchitecture was studied with the aid of micro-computed tomography. In the DM group, food intake as well as calcium absorbed and retained and liver osteopontin mRNA increased, while Ca in the serum and femur decreased, and the bone microarchitecture worsened, in comparison with the control. In the DMV group, the amount of Ca absorbed and retained was similar to DM rats. Although the Ca content in the femur increased and osteopontin mRNA decreased, there were no significant changes in the bone microarchitecture, in comparison to the DM rats. In the DMVH group, the amount of Ca absorbed and retained, and the serum and femur content were equivalent to the control. The levels of osteopontin mRNA decreased and bone mineralization improved, compared to the DM group. We conclude that treatment with 3 mg V per d of the glucose lowering agent bis(maltolato)oxovanadium(iv) causes a decrease in osteopontin mRNA, which could favour the normalization of changes in Ca homeostasis and bone microarchitecture, both at the cortical and trabecular levels, caused by diabetes.
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Affiliation(s)
- Cristina Sanchez-Gonzalez
- CIBM, IMUDS, Department of Physiology, Faculty of Pharmacy, University of Granada, E-18071 Granada, Spain.
| | - Laura Moreno
- CIBM, IMUDS, Department of Physiology, Faculty of Pharmacy, University of Granada, E-18071 Granada, Spain.
| | - Carlos Lopez-Chaves
- CIBM, IMUDS, Department of Physiology, Faculty of Pharmacy, University of Granada, E-18071 Granada, Spain.
| | - Elena Nebot
- CIBM, IMUDS, Department of Physiology, Faculty of Pharmacy, University of Granada, E-18071 Granada, Spain. and Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Austria
| | - Peter Pietschmann
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Austria
| | | | - Julio Galvez
- CIBERehd, Department of Pharmacology, University of Granada, 18071 Granada, Spain
| | - María Montes-Bayon
- Department of Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33007 Oviedo, Spain.
| | - Alfredo Sanz-Medel
- Department of Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33007 Oviedo, Spain.
| | - Juan Llopis
- CIBM, IMUDS, Department of Physiology, Faculty of Pharmacy, University of Granada, E-18071 Granada, Spain.
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37
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Nuñez-Garcia M, Gomez-Santos B, Buqué X, García-Rodriguez JL, Romero MR, Marin JJG, Arteta B, García-Monzón C, Castaño L, Syn WK, Fresnedo O, Aspichueta P. Osteopontin regulates the cross-talk between phosphatidylcholine and cholesterol metabolism in mouse liver. J Lipid Res 2017; 58:1903-1915. [PMID: 28754826 DOI: 10.1194/jlr.m078980] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 07/28/2017] [Indexed: 12/15/2022] Open
Abstract
Osteopontin (OPN) is involved in different liver pathologies in which metabolic dysregulation is a hallmark. Here, we investigated whether OPN could alter liver, and more specifically hepatocyte, lipid metabolism and the mechanism involved. In mice, lack of OPN enhanced cholesterol 7α-hydroxylase (CYP7A1) levels and promoted loss of phosphatidylcholine (PC) content in liver; in vivo treatment with recombinant (r)OPN caused opposite effects. rOPN directly decreased CYP7A1 levels through activation of focal adhesion kinase-AKT signaling in hepatocytes. PC content was also decreased in OPN-deficient (OPN-KO) hepatocytes in which de novo FA and PC synthesis was lower, whereas cholesterol (CHOL) synthesis was higher, than in WT hepatocytes. In vivo inhibition of cholesterogenesis normalized liver PC content in OPN-KO mice, demonstrating that OPN regulates the cross-talk between liver CHOL and PC metabolism. Matched liver and serum samples showed a positive correlation between serum OPN levels and liver PC and CHOL concentration in nonobese patients with nonalcoholic fatty liver. In conclusion, OPN regulates CYP7A1 levels and the metabolic fate of liver acetyl-CoA as a result of CHOL and PC metabolism interplay. The results suggest that CYP7A1 is a main axis and that serum OPN could disrupt liver PC and CHOL metabolism, contributing to nonalcoholic fatty liver disease progression in nonobese patients.
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Affiliation(s)
- Maitane Nuñez-Garcia
- Departments of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Beatriz Gomez-Santos
- Departments of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Xabier Buqué
- Departments of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain.,Biocruces Health Research Institute, Barakaldo, Spain
| | - Juan L García-Rodriguez
- Departments of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Marta R Romero
- Experimental Hepatology and Drug Targeting (HEVEFARM), IBSAL, University of Salamanca, Salamanca, Spain.,Center for the Study of Liver and Gastrointestinal Diseases (CIBERehd), Carlos III National Institute of Health, Madrid, Spain
| | - Jose J G Marin
- Experimental Hepatology and Drug Targeting (HEVEFARM), IBSAL, University of Salamanca, Salamanca, Spain.,Center for the Study of Liver and Gastrointestinal Diseases (CIBERehd), Carlos III National Institute of Health, Madrid, Spain
| | - Beatriz Arteta
- Cellular Biology and Histology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Carmelo García-Monzón
- Center for the Study of Liver and Gastrointestinal Diseases (CIBERehd), Carlos III National Institute of Health, Madrid, Spain.,Liver Research Unit, Santa Cristina University Hospital, Instituto de Investigación Sanitaria Princesa, Madrid, Spain
| | - Luis Castaño
- Biocruces Health Research Institute, Barakaldo, Spain.,Hospital Universitario Cruces, Barakaldo, Spain.,Pediatrics Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain.,CIBERDEM, CIBERER Carlos III National Institute of Health, Madrid, Spain
| | - Wing-Kin Syn
- Regeneration and Repair, Institute of Hepatology, Foundation for Liver Research, London, United Kingdom.,Division of Gastroenterology and Hepatology, Medical University of South Carolina, Charleston, SC.,Section of Gastroenterology, Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC
| | - Olatz Fresnedo
- Departments of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Patricia Aspichueta
- Departments of Physiology, Faculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Leioa, Spain .,Biocruces Health Research Institute, Barakaldo, Spain
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Das N, Mandala A, Bhattacharjee S, Mukherjee D, Bandyopadhyay D, Roy SS. Dietary fat proportionately enhances oxidative stress and glucose intolerance followed by impaired expression of the genes associated with mitochondrial biogenesis. Food Funct 2017; 8:1577-1586. [PMID: 28282095 DOI: 10.1039/c6fo01326k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Consumption of food that surpasses the metabolic necessity of the body leads to an epidemic condition termed obesity, which causes several metabolic disorders including oxidative damage. Dietary intervention can enlighten the mechanisms and therapeutics associated with these metabolic disorders. The reported studies related to diet include fat of different kinds and from different sources, however they lack dose response aspects. Our study highlighted the importance of dietary fat modification in modulating oxidative stress-induced glucose intolerance. Animals were maintained on a diet with a varied content of fat (30%/45%/60%) for 12 weeks and the 'withdrawal' group was fed a standard diet for another 10 weeks. The diet containing 60 energy% of fat displayed glucose intolerance, high ALT, low GSH levels and tissue-specific modulation of the prooxidant/antioxidant enzymatic activities in the liver/muscles. Prolonged sustenance of the 60 energy% fat containing diet-fed rats on standard diet led to the alteration of antioxidant activities, reversing the oxidative damage. Notably, the 'withdrawal' group displayed an organ-specific response towards dietary modification where the recovery of the antioxidant activities was observed to be much more pronounced in the liver as compared to the muscle. Further, we identified the differential expression of liver/muscle-specific genes associated with oxidative stress and mitochondrial biogenesis in response to the differing fat content. These genes can serve as markers for HFD-induced metabolic complications involving the liver/muscle. Altogether, our study has highlighted the novel area where obesity-induced oxidative stress linked alterations expressed diet and organ specific responses that are recovered by altering the dietary regimen. Future investigation of dietary modulation will open nascent avenues for developing therapeutic modalities addressing obesity-related metabolic complications.
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Affiliation(s)
- Nabanita Das
- Cell Biology and Physiology Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S. C. Mullick Road, Kolkata 700032, India.
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Jiang P, Zhang D, Qiu H, Yi X, Zhang Y, Cao Y, Zhao B, Xia Z, Wang C. Tiron ameliorates high glucose-induced cardiac myocyte apoptosis by PKCδ-dependent inhibition of osteopontin. Clin Exp Pharmacol Physiol 2017; 44:760-770. [PMID: 28394420 DOI: 10.1111/1440-1681.12762] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 03/17/2017] [Accepted: 03/31/2017] [Indexed: 12/25/2022]
Affiliation(s)
- Ping Jiang
- Department of Cardiovascular Medicine; The People's Hospital of Gongan County; Gongan China
- Department of Pathology & Pathophysiology; Wuhan University School of Basic Medical Sciences; Wuhan China
| | - Deling Zhang
- Department of Pathology & Pathophysiology; Wuhan University School of Basic Medical Sciences; Wuhan China
| | - Hong Qiu
- Department of Laboratory; Dongfeng General Hospital of Hubei Medical University; Shiyan China
| | - Xianqi Yi
- Department of Cardiovascular Medicine; The People's Hospital of Gongan County; Gongan China
- Department of Pathology & Pathophysiology; Wuhan University School of Basic Medical Sciences; Wuhan China
| | - Yemin Zhang
- Department of Pathology & Pathophysiology; Wuhan University School of Basic Medical Sciences; Wuhan China
| | - Yingkang Cao
- Department of Pathology & Pathophysiology; Wuhan University School of Basic Medical Sciences; Wuhan China
| | - Bo Zhao
- Department of Anesthesiology; Wuhan University Renmin Hospital; Wuhan China
| | - Zhongyuan Xia
- Department of Anesthesiology; Wuhan University Renmin Hospital; Wuhan China
| | - Changhua Wang
- Department of Pathology & Pathophysiology; Wuhan University School of Basic Medical Sciences; Wuhan China
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Ito M, Makino N, Matsuda A, Ikeda Y, Kakizaki Y, Saito Y, Ueno Y, Kawata S. High Glucose Accelerates Cell Proliferation and Increases the Secretion and mRNA Expression of Osteopontin in Human Pancreatic Duct Epithelial Cells. Int J Mol Sci 2017; 18:ijms18040807. [PMID: 28417915 PMCID: PMC5412391 DOI: 10.3390/ijms18040807] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 04/05/2017] [Accepted: 04/08/2017] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND The incidence of pancreatic cancer is increasing year-by-year in Japan. Among the diseases that complicate pancreatic cancer, diabetes is the most common. Recently, it has become evident that patients suffering from diabetes and obesity show increased expression of osteopontin (OPN). The purpose of this study was to investigate the effect of high glucose and high insulin culture conditions on a human pancreatic duct epithelial cell line (HPDE-6), focusing particularly on OPN expression. METHODS HPDE-6 were cultured under various conditions, employing several combinations of glucose (normal, 6 mM high, 30 mM, and 60 mM) and insulin (0.1 nM, 1 nM) concentration. RESULTS HPDE-6 cell proliferation was significantly accelerated under high glucose culture conditions in comparison to samples in 6 mM glucose, and was more prominent under high insulin conditions. At the same time, the expression of OPN mRNA was also increased significantly. In comparison with 6 mM glucose, the expression of 8-OHdG DNA was increased in high glucose culture. CONCLUSION HPDE-6 cells show accelerated proliferation and increased OPN expression when cultured under high glucose and high insulin conditions. Furthermore, the cells show increased oxidative stress in the presence of high glucose.
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Affiliation(s)
- Miho Ito
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan.
| | - Naohiko Makino
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan.
| | - Akiko Matsuda
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan.
| | - Yushi Ikeda
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan.
| | - Yasuharu Kakizaki
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan.
| | - Yoshihiko Saito
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan.
| | - Yoshiyuki Ueno
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata 990-9585, Japan.
| | - Sumio Kawata
- Hyogo Prefectural Nishinomiya Hospital, Nishinomiya 662-0918, Japan.
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Osteopontin: Relation between Adipose Tissue and Bone Homeostasis. Stem Cells Int 2017; 2017:4045238. [PMID: 28194185 PMCID: PMC5282444 DOI: 10.1155/2017/4045238] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 11/19/2016] [Accepted: 12/18/2016] [Indexed: 12/20/2022] Open
Abstract
Osteopontin (OPN) is a multifunctional protein mainly associated with bone metabolism and remodeling. Besides its physiological functions, OPN is implicated in the pathogenesis of a variety of disease states, such as obesity and osteoporosis. Importantly, during the last decades obesity and osteoporosis have become among the main threats to health worldwide. Because OPN is a protein principally expressed in cells with multifaceted effects on bone morphogenesis and remodeling and because it seems to be one of the most overexpressed genes in the adipose tissue of the obese contributing to osteoporosis, this mini review will highlight recent insights about relation between adipose tissue and bone homeostasis.
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Grün NG, Zeyda K, Moreno-Viedma V, Strohmeier K, Staffler G, Zeyda M, Stulnig TM. A humanized osteopontin mouse model and its application in immunometabolic obesity studies. Transl Res 2016; 178:63-73.e2. [PMID: 27490454 DOI: 10.1016/j.trsl.2016.07.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Revised: 07/04/2016] [Accepted: 07/11/2016] [Indexed: 10/21/2022]
Abstract
Osteopontin (OPN) is a multifunctional protein involved in several inflammatory processes and pathogeneses including obesity-related disorders and cancer. OPN binds to a variety of integrin receptors and CD44 resulting in a proinflammatory stimulus. Therefore, OPN constitutes a novel interesting target to develop new therapeutic strategies, which counteract OPN's proinflammatory properties. We established a humanized SPP1 (hSPP1) mouse model and evaluated its suitability as a model for obesity and insulin resistance. Unchallenged hSPP1 animals did not significantly differ in body weight and gross behavioral properties compared to wild-type (WT) animals. High-fat diet-challenged hSPP1 similarly developed obesity and inflammation, whereas insulin resistance was markedly changed. However, OPN expression profile in tissues was significantly altered in hSPP1 compared to WT depending on the diet. In conclusion, we developed a versatile humanized model to study the action of OPN in vivo and to develop strategies that target human OPN in a variety of pathologies.
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Affiliation(s)
- Nicole G Grün
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Karina Zeyda
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria; FH Campus Wien, University of Applied Sciences, Department Health, Section Biomedical Science, Vienna, Austria
| | - Veronica Moreno-Viedma
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Karin Strohmeier
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | | | - Maximilian Zeyda
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria; Department of Pediatrics and Adolescent Medicine, Clinical Division of Pediatric Pulmonology, Allergology and Endocrinology, Medical University of Vienna, Vienna Austria
| | - Thomas M Stulnig
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria.
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Grün NG, Strohmeier K, Moreno-Viedma V, Le Bras M, Landlinger C, Zeyda K, Wanko B, Leitner L, Staffler G, Zeyda M, Stulnig TM. Peptide-based vaccination against OPN integrin binding sites does not improve cardio-metabolic disease in mice. Immunol Lett 2016; 179:85-94. [PMID: 27639826 DOI: 10.1016/j.imlet.2016.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 09/04/2016] [Accepted: 09/12/2016] [Indexed: 11/18/2022]
Abstract
Obesity causes insulin resistance via a chronic low-grade inflammation. This inflammation is characterized by elevated pro-inflammatory markers and macrophage accumulation in the adipose tissue (AT). AT inflammation is a key factor causing insulin resistance and thus type 2 diabetes, both linked to atherosclerotic cardiovascular disease. Osteopontin (OPN), a well-known inflammatory cytokine, is involved in obesity-linked complications including AT inflammation, insulin resistance, atherosclerosis and CVD. During inflammation, OPN is proteolytically cleaved by matrix metalloproteinases or thrombin leading to increased OPN activity. Therefore, OPN provides a new interesting target for immunological prevention and treatment of obesity-associated diseases. The aim of our study was to evaluate peptide-based vaccines against integrin binding sites of OPN and to examine whether these active immunotherapies are functional in reducing metabolic tissue inflammation, insulin resistance, and atherosclerosis in a cardio-metabolic (Ldlr-/- mice) and a diet-induced obesity model (WT mice). However, atherosclerosis, insulin resistance and AT inflammation were not diminished after treatment with OPN-derived peptides in murine models. Lack of efficacy was based on a failure to induce antibodies capable to bind epitopes in the context of functional OPN protein. In conclusion, our data point to unexpected challenges in the immunotherapeutic targeting of adhesive motives, such as RGD containing sequences, on endogenous proteins.
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Affiliation(s)
- Nicole G Grün
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Karin Strohmeier
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Veronica Moreno-Viedma
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | | | | | - Karina Zeyda
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria; FH Campus Wien, University of Applied Sciences, Department Health, Section Biomedical Science, Vienna, Austria
| | - Bettina Wanko
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Lukas Leitner
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | | | - Maximilian Zeyda
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria; Department of Pediatrics and Adolescent Medicine, Clinical Division of Pediatric Pulmonology, Allergology and Endocrinology, Medical University of Vienna, Vienna, Austria
| | - Thomas M Stulnig
- Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Department of Medicine III, Medical University of Vienna, Vienna, Austria.
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Myneni VD, Mousa A, Kaartinen MT. Factor XIII-A transglutaminase deficient mice show signs of metabolically healthy obesity on high fat diet. Sci Rep 2016; 6:35574. [PMID: 27759118 PMCID: PMC5069677 DOI: 10.1038/srep35574] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 10/03/2016] [Indexed: 12/20/2022] Open
Abstract
F13A1 gene, which encodes for Factor XIII-A blood clotting factor and a transglutaminase enzyme, was recently identified as a potential causative gene for obesity in humans. In our previous in vitro work, we showed that FXIII-A regulates preadipocyte differentiation and modulates insulin signaling via promoting plasma fibronectin assembly into the extracellular matrix. To understand the role of FXIII-A in whole body energy metabolism, here we have characterized the metabolic phenotype of F13a1-/- mice. F13a1-/- and F13a1+/+ type mice were fed chow or obesogenic, high fat diet for 20 weeks. Weight gain, total fat mass and fat pad mass, glucose handling, insulin sensitivity, energy expenditure and, morphological and biochemical analysis of adipose tissue was performed. We show that mice lacking FXIII-A gain weight on obesogenic diet, similarly as wild type mice, but exhibit a number of features of metabolically healthy obesity such as protection from developing diet-induced insulin resistance and hyperinsulinemia. Mice also show normal fasting glucose levels, larger adipocytes, decreased extracellular matrix accumulation and inflammation of adipose tissue, as well as decreased circulating triglycerides. This study reveals that FXIII-A transglutaminase can regulate whole body insulin sensitivity and may have a role in the development of diet-induced metabolic disturbances.
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Affiliation(s)
- Vamsee D Myneni
- Faculty of Dentistry, McGill University, Montreal, QC, Canada
| | - Aisha Mousa
- Faculty of Dentistry, McGill University, Montreal, QC, Canada
| | - Mari T Kaartinen
- Faculty of Dentistry, McGill University, Montreal, QC, Canada.,Division of Experimental Medicine, Department of Medicine, Faculty of Medicine, McGill University, Montreal, QC, Canada
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Wang G, Zhao C, Chen S, Li X, Zhang L, Chang C, Xu C. A preliminary in vivo study of the effects of OPN on rat liver regeneration induced by partial hepatectomy. Mol Biol Rep 2016; 43:1371-1382. [PMID: 27585571 DOI: 10.1007/s11033-016-4071-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2015] [Accepted: 08/25/2016] [Indexed: 01/15/2023]
Abstract
Osteopontin (OPN) is a member of Th1 cytokine secreted by activated lymphocytes and macrophages. However, it deserves to be studied whether OPN could promote cell activation or proliferation, and then facilitate hepatic self-repair during liver regeneration (LR). This study is designed to further reveal the effects of OPN on LR in vivo. Firstly, quantitative reverse transcription-PCR (qRT-PCR) and western blot (WB) were utilized to validate the expression profile of endogenous OPN in rat regenerating livers after partial hepatectomy (PH). Then OPN expression vector, two shRNA expression vectors and their respective test vectors were successfully constructed. Afterwards, test vectors were administrated into mouse livers via tail vein to find the more efficient shRNA. Furthermore, OPN expression vector and the more efficient shRNA expression vector were injected into rat regenerating livers, and then the changes in liver regeneration and hepatic microstructure were respectively detected by liver regeneration rate and HE staining, while the expressions of several marker genes were detected by qRT-PCR and WB. Endogenous OPN was strikingly up-regulated in both mRNA and protein level during LR, especially at 12 and 72 h after PH. The shRNA expression vector Opn(313) was found to be more efficient than Opn(887) in silencing the expression of Opn. Then OPN expression vector and Opn(313) were injected into rat remnant livers, and it showed that OPN overexpression aggravated hepatic necrosis and leukocytes infiltration, while OPN silencing inhibited liver regeneration rate and the expressions of PCNA and CCL2, but augmented that of BAX. In conclusion, OPN might enhance inflammation and cell proliferation, attenuate cell apoptosis, and ultimately facilitate liver regeneration at the termination stage of liver regeneration.
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Affiliation(s)
- Gaiping Wang
- College of Life Science, Henan Normal University, No. 46, Construction East Road, Xinxiang, 453007, Henan, China.,State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Congcong Zhao
- College of Life Science, Henan Normal University, No. 46, Construction East Road, Xinxiang, 453007, Henan, China.,State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Shasha Chen
- College of Life Science, Henan Normal University, No. 46, Construction East Road, Xinxiang, 453007, Henan, China.,State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Xiaofang Li
- College of Life Science, Henan Normal University, No. 46, Construction East Road, Xinxiang, 453007, Henan, China.,State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Ling Zhang
- Henan Academy of Fishery Science, Zhengzhou, 450044, Henan, China
| | - Cuifang Chang
- State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, Henan, China
| | - Cunshuan Xu
- College of Life Science, Henan Normal University, No. 46, Construction East Road, Xinxiang, 453007, Henan, China. .,State Key Laboratory Cultivation Base for Cell Differentiation Regulation, Henan Normal University, Xinxiang, 453007, Henan, China.
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Wen Y, Jeong S, Xia Q, Kong X. Role of Osteopontin in Liver Diseases. Int J Biol Sci 2016; 12:1121-8. [PMID: 27570486 PMCID: PMC4997056 DOI: 10.7150/ijbs.16445] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 07/08/2016] [Indexed: 12/12/2022] Open
Abstract
Osteopontin (OPN), a multifunctional protein, is involved in numerous pathological conditions including inflammation, immunity, angiogenesis, fibrogenesis and carcinogenesis in various tissues. Extensive studies have elucidated the critical role of OPN in cell signaling such as regulation of cell proliferation, migration, inflammation, fibrosis and tumor progression. In the liver, OPN interacts with integrins, CD44, vimentin and MyD88 signaling, thereby induces infiltration, migration, invasion and metastasis of cells. OPN is highlighted as a chemoattractant for macrophages and neutrophils during injury in inflammatory liver diseases. OPN activates hepatic stellate cells (HSCs) to exert an enhancer in fibrogenesis. The role of OPN in hepatocellular carcinoma (HCC) has also generated significant interests, especially with regards to its role as a diagnostic and prognostic factor. Interestingly, OPN acts an opposing role in liver repair under different pathological conditions. This review summarizes the current understanding of OPN in liver diseases. Further understanding of the pathophysiological role of OPN in cellular interactions and molecular mechanisms associated with hepatic inflammation, fibrosis and cancer may contribute to the development of novel strategies for clinical diagnosis, monitoring and therapy of liver diseases.
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Affiliation(s)
- Yankai Wen
- Department of Liver Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China;; School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Seogsong Jeong
- Department of Liver Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Qiang Xia
- Department of Liver Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoni Kong
- Department of Liver Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
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Schuch K, Wanko B, Ambroz K, Castelo-Rosa A, Moreno-Viedma V, Grün NG, Leitner L, Staffler G, Zeyda M, Stulnig TM. Osteopontin affects macrophage polarization promoting endocytic but not inflammatory properties. Obesity (Silver Spring) 2016; 24:1489-98. [PMID: 27221527 DOI: 10.1002/oby.21510] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/29/2016] [Accepted: 03/04/2016] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Macrophages are the main drivers of obesity-induced adipose tissue (AT) inflammation that causes insulin resistance. Macrophages polarize toward different inflammatory (M1) or protective (M2) phenotypes. Osteopontin (OPN) is an inflammatory cytokine highly expressed in AT in obesity and known to be involved in chronic inflammatory processes. It was hypothesized that OPN polarizes macrophages into a proinflammatory phenotype. METHODS AT macrophages (ATMs) of OPN-deficient (Spp1(-/-) ) and wild-type C57BL/6 (WT) mice with obesity and bone marrow-derived macrophages (BMDMs) of Spp1(-/-) and WT mice as well as human monocyte-derived macrophages (MDMs) polarized in the presence of OPN were investigated. RESULTS While ATM infiltration was lower in Spp1(-/-) upon high-fat diet, Spp1(-/-) ATMs expressed more M1 and less M2 markers but less tumor necrosis factor-α compared with WT. There was no effect of OPN deficiency on BMDM polarization. In human MDMs, the presence of OPN during polarization ambiguously altered M1/M2-related marker expression and diminished LPS-induced inflammatory cytokine production. Strikingly, phagocytic activity was elevated by the presence of OPN during polarization in both human MDMs and murine BMDMs. CONCLUSIONS In contradiction to our hypothesis, data indicated that OPN does not induce inflammatory macrophages but was a signal to induce phagocytosis, which may be required due to increased adipocyte death in obesity.
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Affiliation(s)
- Karina Schuch
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
- Department of Health, Section Biomedical Science, FH Campus Wien, University of Applied Sciences, Vienna, Austria
| | - Bettina Wanko
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
| | - Katharina Ambroz
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
- Department of Health, Section Biomedical Science, FH Campus Wien, University of Applied Sciences, Vienna, Austria
| | - Alexandra Castelo-Rosa
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
- Department of Health, Section Biomedical Science, FH Campus Wien, University of Applied Sciences, Vienna, Austria
| | - Verónica Moreno-Viedma
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
| | - Nicole G Grün
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
| | - Lukas Leitner
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
| | | | - Maximilian Zeyda
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
- Department of Pediatrics and Adolescent Medicine, Clinical Division of Pediatric Pulmonology, Allergology and Endocrinology, Medical University of Vienna, Vienna, Austria
| | - Thomas M Stulnig
- Department of Medicine III, Christian Doppler Laboratory for Cardio-Metabolic Immunotherapy and Clinical Division of Endocrinology and Metabolism, Medical University of Vienna, Vienna, Austria
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Gene expression profiles predict the possible regulatory role of OPN-mediated signaling pathways in rat liver regeneration. Gene 2016; 576:782-90. [DOI: 10.1016/j.gene.2015.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 11/03/2015] [Accepted: 11/08/2015] [Indexed: 12/28/2022]
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Coombes JD, Choi SS, Swiderska-Syn M, Manka P, Reid DT, Palma E, Briones-Orta MA, Xie G, Younis R, Kitamura N, Della Peruta M, Bitencourt S, Dollé L, Oo YH, Mi Z, Kuo PC, Williams R, Chokshi S, Canbay A, Claridge LC, Eksteen B, Diehl AM, Syn WK. Osteopontin is a proximal effector of leptin-mediated non-alcoholic steatohepatitis (NASH) fibrosis. Biochim Biophys Acta Mol Basis Dis 2015; 1862:135-44. [PMID: 26529285 DOI: 10.1016/j.bbadis.2015.10.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 10/20/2015] [Accepted: 10/29/2015] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Liver fibrosis develops when hepatic stellate cells (HSC) are activated into collagen-producing myofibroblasts. In non-alcoholic steatohepatitis (NASH), the adipokine leptin is upregulated, and promotes liver fibrosis by directly activating HSC via the hedgehog pathway. We reported that hedgehog-regulated osteopontin (OPN) plays a key role in promoting liver fibrosis. Herein, we evaluated if OPN mediates leptin-profibrogenic effects in NASH. METHODS Leptin-deficient (ob/ob) and wild-type (WT) mice were fed control or methionine-choline deficient (MCD) diet. Liver tissues were assessed by Sirius-red, OPN and αSMA IHC, and qRT-PCR for fibrogenic genes. In vitro, HSC with stable OPN (or control) knockdown were treated with recombinant (r)leptin and OPN-neutralizing or sham-aptamers. HSC response to OPN loss was assessed by wound healing assay. OPN-aptamers were also added to precision-cut liver slices (PCLS), and administered to MCD-fed WT (leptin-intact) mice to determine if OPN neutralization abrogated fibrogenesis. RESULTS MCD-fed WT mice developed NASH-fibrosis, upregulated OPN, and accumulated αSMA+ cells. Conversely, MCD-fed ob/ob mice developed less fibrosis and accumulated fewer αSMA+ and OPN+ cells. In vitro, leptin-treated HSC upregulated OPN, αSMA, collagen 1α1 and TGFβ mRNA by nearly 3-fold, but this effect was blunted by OPN loss. Inhibition of PI3K and transduction of dominant negative-Akt abrogated leptin-mediated OPN induction, while constitutive active-Akt upregulated OPN. Finally, OPN neutralization reduced leptin-mediated fibrogenesis in both PCLS and MCD-fed mice. CONCLUSION OPN overexpression in NASH enhances leptin-mediated fibrogenesis via PI3K/Akt. OPN neutralization significantly reduces NASH fibrosis, reinforcing the potential utility of targeting OPN in the treatment of patients with advanced NASH.
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Affiliation(s)
- Jason D Coombes
- Regeneration and Repair Group, The Institute of Hepatology, Foundation for Liver Research, London, UK; Division of Transplantation Immunology and Mucosal Biology, King's College London, UK
| | - Steve S Choi
- Division of Gastroenterology, Department of Medicine, Duke University, NC, USA; Section of Gastroenterology, Department of Medicine, Durham Veteran Affairs Medical Center, Durham, NC, USA
| | | | - Paul Manka
- Regeneration and Repair Group, The Institute of Hepatology, Foundation for Liver Research, London, UK; Department of Gastroenterology and Hepatology, Essen University Hospital, Essen, Germany
| | - Danielle T Reid
- Snyder Institute for Chronic Diseases, Health Research and Innovation Centre (HRIC), University of Calgary, Canada
| | - Elena Palma
- Division of Transplantation Immunology and Mucosal Biology, King's College London, UK; Viral Hepatitis and Alcohol Research Group, The Institute of Hepatology, Foundation for Liver Research, London, UK
| | - Marco A Briones-Orta
- Regeneration and Repair Group, The Institute of Hepatology, Foundation for Liver Research, London, UK; Division of Transplantation Immunology and Mucosal Biology, King's College London, UK
| | - Guanhua Xie
- Division of Gastroenterology, Department of Medicine, Duke University, NC, USA
| | - Rasha Younis
- Regeneration and Repair Group, The Institute of Hepatology, Foundation for Liver Research, London, UK
| | - Naoto Kitamura
- Regeneration and Repair Group, The Institute of Hepatology, Foundation for Liver Research, London, UK
| | - Marco Della Peruta
- Viral Hepatitis and Alcohol Research Group, The Institute of Hepatology, Foundation for Liver Research, London, UK
| | - Shanna Bitencourt
- Liver Cell Biology Lab (LIVR), Department of Cell Biology (CYTO), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Laurent Dollé
- Liver Cell Biology Lab (LIVR), Department of Cell Biology (CYTO), Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Ye Htun Oo
- Centre for Liver Research and NIHR Birmingham Biomedical Research Unit, University of Birmingham, Birmingham, UK
| | - Zhiyong Mi
- Department of Surgery, Loyola University, Chicago, USA
| | - Paul C Kuo
- Department of Surgery, Loyola University, Chicago, USA
| | - Roger Williams
- Regeneration and Repair Group, The Institute of Hepatology, Foundation for Liver Research, London, UK; Division of Transplantation Immunology and Mucosal Biology, King's College London, UK
| | - Shilpa Chokshi
- Division of Transplantation Immunology and Mucosal Biology, King's College London, UK; Viral Hepatitis and Alcohol Research Group, The Institute of Hepatology, Foundation for Liver Research, London, UK
| | - Ali Canbay
- Department of Gastroenterology and Hepatology, Essen University Hospital, Essen, Germany
| | | | - Bertus Eksteen
- Snyder Institute for Chronic Diseases, Health Research and Innovation Centre (HRIC), University of Calgary, Canada
| | - Anna Mae Diehl
- Division of Gastroenterology, Department of Medicine, Duke University, NC, USA
| | - Wing-Kin Syn
- Regeneration and Repair Group, The Institute of Hepatology, Foundation for Liver Research, London, UK; Division of Transplantation Immunology and Mucosal Biology, King's College London, UK; Department of Surgery, Loyola University, Chicago, USA; Liver Unit, Barts Health NHS Trust, London, UK; Department of Physiology, University of the Basque Country, Bilbao, Spain.
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Rodríguez A, Ezquerro S, Méndez-Giménez L, Becerril S, Frühbeck G. Revisiting the adipocyte: a model for integration of cytokine signaling in the regulation of energy metabolism. Am J Physiol Endocrinol Metab 2015; 309:E691-714. [PMID: 26330344 DOI: 10.1152/ajpendo.00297.2015] [Citation(s) in RCA: 180] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 08/24/2015] [Indexed: 02/08/2023]
Abstract
Adipose tissue constitutes an extremely active endocrine organ with a network of signaling pathways enabling the organism to adapt to a wide range of different metabolic challenges, such as starvation, stress, infection, and short periods of gross energy excess. The functional pleiotropism of adipose tissue relies on its ability to synthesize and release a huge variety of hormones, cytokines, complement and growth factors, extracellular matrix proteins, and vasoactive factors, collectively termed adipokines. Obesity is associated with adipose tissue dysfunction leading to the onset of several pathologies including type 2 diabetes, dyslipidemia, nonalcoholic fatty liver, or hypertension, among others. The mechanisms underlying the development of obesity and its associated comorbidities include the hypertrophy and/or hyperplasia of adipocytes, adipose tissue inflammation, impaired extracellular matrix remodeling, and fibrosis together with an altered secretion of adipokines. Recently, the potential role of brown and beige adipose tissue in the protection against obesity has been also recognized. In contrast to white adipocytes, which store energy in the form of fat, brown and beige fat cells display energy-dissipating capacity through the promotion of triacylglycerol clearance, glucose disposal, and generation of heat for thermogenesis. Identification of the morphological and molecular changes in white, beige, and brown adipose tissue during weight gain is of utmost relevance for the identification of pharmacological targets for the treatment of obesity and its associated metabolic diseases.
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Affiliation(s)
- Amaia Rodríguez
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain; and Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Silvia Ezquerro
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain
| | - Leire Méndez-Giménez
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain; and Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Sara Becerril
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain; and Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
| | - Gema Frühbeck
- Metabolic Research Laboratory, Clínica Universidad de Navarra, Pamplona, Spain; Department of Endocrinology and Nutrition, Clínica Universidad de Navarra, Pamplona, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain; and Obesity and Adipobiology Group, Instituto de Investigación Sanitaria de Navarra, Pamplona, Spain
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