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Mitochondrial Uncoupling Proteins (UCPs) as Key Modulators of ROS Homeostasis: A Crosstalk between Diabesity and Male Infertility? Antioxidants (Basel) 2021; 10:antiox10111746. [PMID: 34829617 PMCID: PMC8614977 DOI: 10.3390/antiox10111746] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 12/14/2022] Open
Abstract
Uncoupling proteins (UCPs) are transmembrane proteins members of the mitochondrial anion transporter family present in the mitochondrial inner membrane. Currently, six homologs have been identified (UCP1-6) in mammals, with ubiquitous tissue distribution and multiple physiological functions. UCPs are regulators of key events for cellular bioenergetic metabolism, such as membrane potential, metabolic efficiency, and energy dissipation also functioning as pivotal modulators of ROS production and general cellular redox state. UCPs can act as proton channels, leading to proton re-entry the mitochondrial matrix from the intermembrane space and thus collapsing the proton gradient and decreasing the membrane potential. Each homolog exhibits its specific functions, from thermogenesis to regulation of ROS production. The expression and function of UCPs are intimately linked to diabesity, with their dysregulation/dysfunction not only associated to diabesity onset, but also by exacerbating oxidative stress-related damage. Male infertility is one of the most overlooked diabesity-related comorbidities, where high oxidative stress takes a major role. In this review, we discuss in detail the expression and function of the different UCP homologs. In addition, the role of UCPs as key regulators of ROS production and redox homeostasis, as well as their influence on the pathophysiology of diabesity and potential role on diabesity-induced male infertility is debated.
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152
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Søberg S, Löfgren J, Philipsen FE, Jensen M, Hansen AE, Ahrens E, Nystrup KB, Nielsen RD, Sølling C, Wedell-Neergaard AS, Berntsen M, Loft A, Kjær A, Gerhart-Hines Z, Johannesen HH, Pedersen BK, Karstoft K, Scheele C. Altered brown fat thermoregulation and enhanced cold-induced thermogenesis in young, healthy, winter-swimming men. CELL REPORTS MEDICINE 2021; 2:100408. [PMID: 34755128 PMCID: PMC8561167 DOI: 10.1016/j.xcrm.2021.100408] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 07/13/2021] [Accepted: 09/17/2021] [Indexed: 12/18/2022]
Abstract
The Scandinavian winter-swimming culture combines brief dips in cold water with hot sauna sessions, with conceivable effects on body temperature. We study thermogenic brown adipose tissue (BAT) in experienced winter-swimming men performing this activity 2–3 times per week. Our data suggest a lower thermal comfort state in the winter swimmers compared with controls, with a lower core temperature and absence of BAT activity. In response to cold, we observe greater increases in cold-induced thermogenesis and supraclavicular skin temperature in the winter swimmers, whereas BAT glucose uptake and muscle activity increase similarly to those of the controls. All subjects demonstrate nocturnal reduction in supraclavicular skin temperature, whereas a distinct peak occurs at 4:30–5:30 a.m. in the winter swimmers. Our data leverage understanding of BAT in adult human thermoregulation, suggest both heat and cold acclimation in winter swimmers, and propose winter swimming as a potential strategy for increasing energy expenditure. Winter swimmers have a lower core temperature at a thermal comfort state than controls Winter swimmers had no BAT glucose uptake at a thermal comfort state Winter swimmers have higher cold-induced thermogenesis than control subjects Human supraclavicular skin temperature varies with a diurnal rhythm
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Affiliation(s)
- Susanna Søberg
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark.,Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Johan Löfgren
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Frederik E Philipsen
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Michal Jensen
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark
| | - Adam E Hansen
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Esben Ahrens
- Department of Neurophysiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Kristin B Nystrup
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Rune D Nielsen
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Christine Sølling
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Anne-Sophie Wedell-Neergaard
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark
| | - Marianne Berntsen
- Department of Neuroanaesthesiology, Rigshospitalet, Copenhagen 2100, Denmark
| | - Annika Loft
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Andreas Kjær
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Zachary Gerhart-Hines
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Helle H Johannesen
- Department of Clinical Physiology, Nuclear Medicine & PET, and Cluster for Molecular Imaging, Rigshospitalet and University of Copenhagen, Copenhagen 2100, Denmark
| | - Bente K Pedersen
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark
| | - Kristian Karstoft
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark.,Department of Clinical Pharmacology, Bispebjerg Hospital, Copenhagen 2400, Denmark
| | - Camilla Scheele
- The Center of Inflammation and Metabolism and the Center for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen 2100, Denmark.,Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
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153
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Khoshhali M, Ebrahimpour K, Shoshtari-Yeganeh B, Kelishadi R. Systematic review and meta-analysis on the association between seasonal variation and gestational diabetes mellitus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:55915-55924. [PMID: 34490580 DOI: 10.1007/s11356-021-16230-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
Recently, there is growing evidence that ambient temperature and seasonal changes are related to the incidence of gestational diabetes mellitus (GDM). Thereby, this study was conducted to evaluate the association between seasonal changes and ambient temperature and GDM. We conducted a systematic search in PubMed, ISI Web of Science, Scopus, Google Scholar, and Cochrane Collaboration for human studies available until the end of 2020. We used the following keywords to identify relevant articles: "Diabetes, Gestational" (MeSH), "Glucose Tolerance Test" (MeSH), "Glucose intolerance" (MeSH), "Pregnancy outcome" (MeSH), "Birth outcome", "Seasons" (MeSH), "Weather" (MeSH), "Ambient Temperature," "Climate Change" (MeSH). Meta-analyses by using STATA software were conducted for analyzing data. Due to the high heterogeneity between included studies, a random-effects model was used. Subgroup analysis, meta-regression, and sensitivity analysis were used to define a source of heterogeneity. We found 13 studies related to the association between ambient temperature and season changes and GDM, which 11 of them were included in meta-analyses. Despite inconsistencies in outcome assessment across studies, we found a significant positive association between seasons of GDM screening and risk of GDM (pooled OR=1.12; 95% CI (1.03, 1.21)). The funnel plot and Egger's test showed that there was no significant publication bias among these studies (p=0.51). In general, season changes showed a significant positive relationship with prevalence of GDM. However, due to the unknown exact mechanism on this association, further studies should be conducted.
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Affiliation(s)
- Mehri Khoshhali
- Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Karim Ebrahimpour
- Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Bahareh Shoshtari-Yeganeh
- Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Roya Kelishadi
- Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
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154
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Ogawa M, Koskensalo K, Laurila S, Holstila M, Lahesmaa M, Virtanen KA, Iida H, Akima H, Nuutila P. Brown adipose tissue fat-fraction is associated with skeletal muscle adiposity. Eur J Appl Physiol 2021; 122:81-90. [PMID: 34564756 DOI: 10.1007/s00421-021-04816-z] [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: 03/01/2021] [Accepted: 09/17/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE While brown adipose tissue (BAT) activity is known to be associated with both muscle and adipose tissue volumes, the association between BAT and muscle composition remains unclear, especially in adults. Therefore, the present study aimed to examine the association between BAT parameters (glucose uptake and fat-fraction) and muscle volumes and intramuscular adipose tissue contents among healthy young and middle-aged men. METHODS BAT glucose uptake was determined using positron emission tomography with [18F]-2-deoxy-2-fluoro-D-glucose (18F-FDG) during cold exposure in 19 young and middle-aged men (36.3 ± 10.7 years). The fat-fraction of BAT was determined from volumes of interest set in cervical and supraclavicular adipose tissue depots using signal fat-fraction maps via magnetic resonance imaging (MRI). Muscle volumes and intramuscular adipose tissue contents of m. tibialis anterior and m. multifidus lumborum were measured using MRI. RESULTS The fat-fraction of BAT was significantly associated with intramuscular adipose tissue content in m. tibialis anterior (n = 13, rs = 0.691, P = 0.009). A similar trend was also observed in m. multifidus lumborum (n = 19, rs = 0.454, P = 0.051). However, BAT glucose uptake was not associated with intramuscular adipose tissue contents in both muscles, nor were muscle volumes associated with the BAT glucose uptake and fat-fraction. CONCLUSION The fat-fraction of BAT increases with skeletal muscle adiposity, especially in the lower leg, among healthy young and middle-aged men.
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Affiliation(s)
- Madoka Ogawa
- Graduate School of Education and Human Development, Nagoya University, Aichi, Japan. .,Nippon Sport Science University, Tokyo, Japan. .,Kyoto Sangyo University, Kyoto, Japan.
| | - Kalle Koskensalo
- Turku PET centre, University of Turku, Turku, Finland.,Turku PET centre, Turku University Hospital, Turku, Finland.,Department of Medical Physics, Turku University Hospital, Turku, Finland.,Heart Center, Turku University Hospital, Turku, Finland
| | - Sanna Laurila
- Turku PET centre, University of Turku, Turku, Finland.,Turku PET centre, Turku University Hospital, Turku, Finland.,Heart Center, Turku University Hospital, Turku, Finland.,Satakunta Central Hospital, Pori, Finland
| | - Milja Holstila
- Turku PET centre, University of Turku, Turku, Finland.,Turku PET centre, Turku University Hospital, Turku, Finland.,Medical Imaging Centre of Southwest Finland, Turku University Hospital, Turku, Finland
| | - Minna Lahesmaa
- Turku PET centre, University of Turku, Turku, Finland.,Turku PET centre, Turku University Hospital, Turku, Finland
| | - Kirsi A Virtanen
- Turku PET centre, Turku University Hospital, Turku, Finland.,Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
| | - Hidehiro Iida
- Turku PET centre, University of Turku, Turku, Finland.,Turku PET centre, Turku University Hospital, Turku, Finland
| | - Hiroshi Akima
- Graduate School of Education and Human Development, Nagoya University, Aichi, Japan.,Research Center of Health, Physical Fitness and Sports, Nagoya University, Aichi, Japan
| | - Pirjo Nuutila
- Turku PET centre, University of Turku, Turku, Finland.,Turku PET centre, Turku University Hospital, Turku, Finland.,Department of Endocrinology, Turku University Hospital, Turku, Finland
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155
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Campolo F, Pofi R, Venneri MA, Isidori AM. Priming metabolism with the type 5 phosphodiesterase: the role of cGMP-hydrolyzing enzymes. Curr Opin Pharmacol 2021; 60:298-305. [PMID: 34507030 DOI: 10.1016/j.coph.2021.08.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 07/24/2021] [Accepted: 08/09/2021] [Indexed: 12/18/2022]
Abstract
The cyclic guanosine monophosphate (cGMP) signaling system is one of the most prominent regulators of many physiopathological processes in humans and rodents. It has been strongly established as an accomplished cellular signal involved in the regulation of energy homeostasis and cell metabolism, and pharmacological enhancement of cGMP has shown beneficial effects in metabolic disorders models. cGMP intracellular levels are finely regulated by phosphodiesterases (PDEs). The main enzyme responsible for the degradation of cGMP is PDE5. Preclinical and clinical studies have shown that PDE5 inhibitors (PDE5i) have beneficial effects on improving insulin resistance and glucose metabolism representing a promising therapeutic strategy for the treatment of metabolic disorders. This review aims to describe the molecular basis underlying the use of PDE5i to prompt cell metabolism and summarize current clinical trials assessing the effects of PDE5i on glucose metabolism.
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Affiliation(s)
- Federica Campolo
- Department of Experimental Medicine, Sapienza University of Rome, Italy
| | - Riccardo Pofi
- Department of Experimental Medicine, Sapienza University of Rome, Italy
| | - Mary Anna Venneri
- Department of Experimental Medicine, Sapienza University of Rome, Italy
| | - Andrea M Isidori
- Department of Experimental Medicine, Sapienza University of Rome, Italy.
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156
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Jiang Z, Zhao M, Voilquin L, Jung Y, Aikio MA, Sahai T, Dou FY, Roche AM, Carcamo-Orive I, Knowles JW, Wabitsch M, Appel EA, Maikawa CL, Camporez JP, Shulman GI, Tsai L, Rosen ED, Gardner CD, Spiegelman BM, Svensson KJ. Isthmin-1 is an adipokine that promotes glucose uptake and improves glucose tolerance and hepatic steatosis. Cell Metab 2021; 33:1836-1852.e11. [PMID: 34348115 PMCID: PMC8429235 DOI: 10.1016/j.cmet.2021.07.010] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 06/02/2021] [Accepted: 07/09/2021] [Indexed: 02/07/2023]
Abstract
With the increasing prevalence of type 2 diabetes and fatty liver disease, there is still an unmet need to better treat hyperglycemia and hyperlipidemia. Here, we identify isthmin-1 (Ism1) as an adipokine and one that has a dual role in increasing adipose glucose uptake while suppressing hepatic lipid synthesis. Ism1 ablation results in impaired glucose tolerance, reduced adipose glucose uptake, and reduced insulin sensitivity, demonstrating an endogenous function for Ism1 in glucose regulation. Mechanistically, Ism1 activates a PI3K-AKT signaling pathway independently of the insulin and insulin-like growth factor receptors. Notably, while the glucoregulatory function is shared with insulin, Ism1 counteracts lipid accumulation in the liver by switching hepatocytes from a lipogenic to a protein synthesis state. Furthermore, therapeutic dosing of recombinant Ism1 improves diabetes in diet-induced obese mice and ameliorates hepatic steatosis in a diet-induced fatty liver mouse model. These findings uncover an unexpected, bioactive protein hormone that might have simultaneous therapeutic potential for diabetes and fatty liver disease.
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Affiliation(s)
- Zewen Jiang
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Meng Zhao
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Laetitia Voilquin
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Yunshin Jung
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Mari A Aikio
- Department of Cell Biology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Tanushi Sahai
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Florence Y Dou
- Department of Cell Biology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Alexander M Roche
- Department of Cell Biology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Ivan Carcamo-Orive
- Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Medicine, Division of Cardiovascular Medicine, and Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Joshua W Knowles
- Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Medicine, Division of Cardiovascular Medicine, and Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Prevention Research Center, Stanford University, Stanford, CA 94305, USA
| | - Martin Wabitsch
- Division of Pediatric Endocrinology and Diabetes, University Medical Center Ulm, Ulm, Germany
| | - Eric A Appel
- Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Materials Science & Engineering, Stanford University, Stanford, CA 94305, USA; Department of Pediatrics (Endocrinology), Stanford University, Stanford, CA 94305, USA
| | - Caitlin L Maikawa
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Joao Paulo Camporez
- Department of Physiology, Ribeirao Preto School of Medicine, University of Sao Paulo, Sao Paulo, Brazil; Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06519, USA
| | - Gerald I Shulman
- Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06519, USA; Department of Cellular and Molecular Physiology and Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06519, USA
| | - Linus Tsai
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Evan D Rosen
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | | | - Bruce M Spiegelman
- Department of Cell Biology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Katrin J Svensson
- Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA; Stanford Diabetes Research Center, Stanford University School of Medicine, Stanford, CA 94305, USA.
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157
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Halbgebauer D, Roos J, Funcke JB, Neubauer H, Hamilton BS, Simon E, Amri EZ, Debatin KM, Wabitsch M, Fischer-Posovszky P, Tews D. Latent TGFβ-binding proteins regulate UCP1 expression and function via TGFβ2. Mol Metab 2021; 53:101336. [PMID: 34481123 PMCID: PMC8456047 DOI: 10.1016/j.molmet.2021.101336] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 08/31/2021] [Accepted: 08/31/2021] [Indexed: 12/26/2022] Open
Abstract
Objective Activation of brown adipose tissue (BAT) in humans has been proposed as a new treatment approach for combating obesity and its associated diseases, as BAT participates in the regulation of energy homeostasis as well as glucose and lipid metabolism. Genetic contributors driving brown adipogenesis in humans have not been fully understood. Methods Profiling the gene expression of progenitor cells from subcutaneous and deep neck adipose tissue, we discovered new secreted factors with potential regulatory roles in white and brown adipogenesis. Among these, members of the latent transforming growth factor beta-binding protein (LTBP) family were highly expressed in brown compared to white adipocyte progenitor cells, suggesting that these proteins are capable of promoting brown adipogenesis. To investigate this potential, we used CRISPR/Cas9 to generate LTBP-deficient human preadipocytes. Results We demonstrate that LTBP2 and LTBP3 deficiency does not affect adipogenic differentiation, but diminishes UCP1 expression and function in the obtained mature adipocytes. We further show that these effects are dependent on TGFβ2 but not TGFβ1 signaling: TGFβ2 deficiency decreases adipocyte UCP1 expression, whereas TGFβ2 treatment increases it. The activity of the LTBP3–TGFβ2 axis that we delineate herein also significantly correlates with UCP1 expression in human white adipose tissue (WAT), suggesting an important role in regulating WAT browning as well. Conclusions These results provide evidence that LTBP3, via TGFβ2, plays an important role in promoting brown adipogenesis by modulating UCP1 expression and mitochondrial oxygen consumption. Inhibition of LTBP2 and LTBP3 reduces secretion of TGFβ2. Both knockout of LTBP2/3 or TGFβ2 inhibit UCP1 expression and mitochondrial respiration in human adipocytes. Expression of TGFβ2 correlates with UCP1 expression in human adipose tissue. Treatment with TGFβ2 rescues inhibition of UCP1 by LTBP knockout during adipogenesis.
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Affiliation(s)
- D Halbgebauer
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany; Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - J Roos
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - J B Funcke
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - H Neubauer
- Cardiometabolic Diseases Research, Boehringer-Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - B S Hamilton
- Cardiometabolic Diseases Research, Boehringer-Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - E Simon
- Global Computational Biology and Digital Sciences, Boehringer-Ingelheim Pharma GmbH & Co. KG, Biberach an der Riss, Germany
| | - E Z Amri
- Université Côte d'Azur, CNRS, Inserm, iBV, Nice, France
| | - K M Debatin
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - M Wabitsch
- Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - P Fischer-Posovszky
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany
| | - D Tews
- Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany; Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany.
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158
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Yang J, Zhang H, Parhat K, Xu H, Li M, Wang X, Ran C. Molecular Imaging of Brown Adipose Tissue Mass. Int J Mol Sci 2021; 22:ijms22179436. [PMID: 34502347 PMCID: PMC8431742 DOI: 10.3390/ijms22179436] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/26/2021] [Accepted: 08/26/2021] [Indexed: 12/28/2022] Open
Abstract
Brown adipose tissue (BAT), a uniquely thermogenic tissue that plays an important role in metabolism and energy expenditure, has recently become a revived target in the fight against metabolic diseases, such as obesity, diabetes, and non-alcoholic fatty liver disease (NAFLD). Different from white adipose tissue (WAT), the brown adipocytes have distinctive features including multilocular lipid droplets, a large number of mitochondria, and a high expression of uncoupling protein-1 (UCP-1), as well as abundant capillarity. These histologic characteristics provide an opportunity to differentiate BAT from WAT using imaging modalities, such as PET/CT, SPECT/CT, MRI, NIRF and Ultrasound. However, most of the reported imaging methods were BAT activation dependent, and the imaging signals could be affected by many factors, including environmental temperatures and the states of the sympathetic nervous system. Accurate BAT mass detection methods that are independent of temperature and hormone levels have the capacity to track the development and changes of BAT throughout the lifetime of mammals, and such methods could be very useful for the investigation of potential BAT-related therapies. In this review, we focus on molecular imaging modalities that can detect and quantify BAT mass. In addition, their detection mechanism and limitations will be discussed as well.
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Affiliation(s)
- Jing Yang
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, MA 02129, USA
- Correspondence: (J.Y.); (C.R.)
| | - Haili Zhang
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Kadirya Parhat
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Hui Xu
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Mingshuang Li
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Xiangyu Wang
- School of Engineering, China Pharmaceutical University, Nanjing 210009, China; (H.Z.); (K.P.); (H.X.); (M.L.); (X.W.)
| | - Chongzhao Ran
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Room 2301, Building 149, Charlestown, Boston, MA 02129, USA
- Correspondence: (J.Y.); (C.R.)
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159
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Nair S, Guanzon D, Jayabalan N, Lai A, Scholz-Romero K, Kalita de Croft P, Ormazabal V, Palma C, Diaz E, McCarthy EA, Shub A, Miranda J, Gratacós E, Crispi F, Duncombe G, Lappas M, McIntyre HD, Rice G, Salomon C. Extracellular vesicle-associated miRNAs are an adaptive response to gestational diabetes mellitus. J Transl Med 2021; 19:360. [PMID: 34416903 PMCID: PMC8377872 DOI: 10.1186/s12967-021-02999-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 07/23/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Gestational diabetes mellitus (GDM) is a serious public health issue affecting 9-15% of all pregnancies worldwide. Recently, it has been suggested that extracellular vesicles (EVs) play a role throughout gestation, including mediating a placental response to hyperglycaemia. Here, we investigated the EV-associated miRNA profile across gestation in GDM, assessed their utility in developing accurate, multivariate classification models, and determined the signaling pathways in skeletal muscle proteome associated with the changes in the EV miRNA profile. METHODS Discovery: A retrospective, case-control study design was used to identify EV-associated miRNAs that vary across pregnancy and clinical status (i.e. GDM or Normal Glucose Tolerance, NGT). EVs were isolated from maternal plasma obtained at early, mid and late gestation (n = 29) and small RNA sequencing was performed. Validation: A longitudinal study design was used to quantify expression of selected miRNAs. EV miRNAs were quantified by real-time PCR (cases = 8, control = 14, samples at three times during pregnancy) and their individual and combined classification efficiencies were evaluated. Quantitative, data-independent acquisition mass spectrometry was use to establish the protein profile in skeletal muscle biopsies from normal and GDM. RESULTS A total of 2822 miRNAs were analyzed using a small RNA library, and a total of 563 miRNAs that significantly changed (p < 0.05) across gestation and 101 miRNAs were significantly changed between NGT and GDM. Analysis of the miRNA changes in NGT and GDM separately identified a total of 256 (NGT-group), and 302 (GDM-group) miRNAs that change across gestation. A multivariate classification model was developed, based on the quantitative expression of EV-associated miRNAs, and the accuracy to correctly assign samples was > 90%. We identified a set of proteins in skeletal muscle biopsies from women with GDM associated with JAK-STAT signaling which could be targeted by the miRNA-92a-3p within circulating EVs. Interestingly, overexpression of miRNA-92a-3p in primary skeletal muscle cells increase insulin-stimulated glucose uptake. CONCLUSIONS During early pregnancy, differently-expressed, EV-associated miRNAs may be of clinical utility in identifying presymptomatic women who will subsequently develop GDM later in gestation. We suggest that miRNA-92a-3p within EVs might be a protected mechanism to increase skeletal muscle insulin sensitivity in GDM.
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Affiliation(s)
- Soumyalekshmi Nair
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Dominic Guanzon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Nanthini Jayabalan
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Andrew Lai
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Katherin Scholz-Romero
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
- Faculty of Biological Sciences, Pharmacology Department, University of Concepcion, Concepción, Chile
| | - Priyakshi Kalita de Croft
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Valeska Ormazabal
- Faculty of Biological Sciences, Pharmacology Department, University of Concepcion, Concepción, Chile
| | - Carlos Palma
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Emilio Diaz
- Faculty of Medicine, Department of Obstetrics and Gynaecology, University of Concepcion, Concepción, Chile
| | - Elizabeth A McCarthy
- Department of Obstetrics and Gynaecology, University of Melbourne, Melbourne, Australia
- Mercy Hospital for Women, 163 Studley Road, Heidelberg, VIC, 3084, Australia
| | - Alexis Shub
- Department of Obstetrics and Gynaecology, University of Melbourne, Melbourne, Australia
- Mercy Hospital for Women, 163 Studley Road, Heidelberg, VIC, 3084, Australia
| | - Jezid Miranda
- Fetal Medicine Research Center, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia Obstetricia i Neonatologia, Universitat de Barcelona, Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - Eduard Gratacós
- Fetal Medicine Research Center, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia Obstetricia i Neonatologia, Universitat de Barcelona, Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - Fátima Crispi
- Fetal Medicine Research Center, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), Institut Clínic de Ginecologia Obstetricia i Neonatologia, Universitat de Barcelona, Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona, Spain
| | - Gregory Duncombe
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Martha Lappas
- Department of Obstetrics and Gynaecology, University of Melbourne, Melbourne, Australia
- Mercy Hospital for Women, 163 Studley Road, Heidelberg, VIC, 3084, Australia
| | - H David McIntyre
- Mater Research, Faculty of Medicine, University of Queensland, Mater Health, South Brisbane, Australia
| | - Gregory Rice
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia
| | - Carlos Salomon
- Exosome Biology Laboratory, Centre for Clinical Diagnostics, UQ Centre for Clinical Research, Royal Brisbane and Women's Hospital, Faculty of Medicine, The University of Queensland, Building 71/918, Herston, QLD, 4029, Australia.
- Faculty of Biological Sciences, Pharmacology Department, University of Concepcion, Concepción, Chile.
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Grander C, Grabherr F, Enrich B, Meyer M, Mayr L, Schwärzler J, Pedrini A, Effenberger M, Adolph TE, Tilg H. Hepatic Meteorin-like and Krüppel-like Factor 3 are Associated with Weight Loss and Liver Injury. Exp Clin Endocrinol Diabetes 2021; 130:406-414. [PMID: 34407548 DOI: 10.1055/a-1537-8950] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Laparoscopic adjustable gastric banding (LAGB) was found to be effective in reducing body weight and improving insulin resistance in patients with obesity and non-alcoholic fatty liver disease (NAFLD). The adipokine/myokine meteorin-like (METNRL) is an important regulator of whole-body energy expenditure. Krüppel-like factor 3 (KLF3), a regulator of METRNL expression in eosinophils, inhibits the beiging of adipose tissue in mice and therefore regulates adipose tissue development. METHODS Thirty-three obese patients undergoing LAGB were included in the study. The hepatic and adipose tissue expression of METNRL and KLF3 was determined before (t0) and 6 months after (t6) LABG. The human liver cancer cell line (HepG2) was stimulated with cytokines and fatty acids and METNRL and KLF3 expressions were analyzed. RESULTS LAGB-associated weight loss was correlated with decreased hepatic METNRL expression. The expression of METNRL and KLF3 in hepatic-and adipose tissues correlated before and after LAGB. Individuals with augmented LAGB-induced weight loss (>20 kg) showed lower hepatic METNRL and KLF3 expression before and after LAGB than patients with <20 kg weight loss. METNRL and KLF3 levels were higher in patients with higher NAFLD activity scores. HepG2 stimulation with interleukin-1β, tumor necrosis factor-α, palmitic acid but not interleukin-6, oleic acid, or lipopolysaccharide, induced the expression of one or both investigated adipokines. CONCLUSIONS The novel description of METRNL and KLF3 as hepatokines could pave the way to target their production and/or signaling in obesity, NAFLD, and related disorders. Both proteins may act as possible biomarkers to estimate weight loss after bariatric surgery.
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Affiliation(s)
- Christoph Grander
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Felix Grabherr
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Barbara Enrich
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Moritz Meyer
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Lisa Mayr
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Julian Schwärzler
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Alisa Pedrini
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Maria Effenberger
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Timon E Adolph
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
| | - Herbert Tilg
- Department of Internal Medicine I, Gastroenterology, Hepatology and Endocrinology, Medical University of Innsbruck, Innsbruck, Austria
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Alghamdi AS, Alqadi A, Alghamdi F, Jenkins RO, Haris PI. Higher ambient temperature is associated with worsening of HbA1c levels in a Saudi population. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2021; 14:881-891. [PMID: 34527131 PMCID: PMC8414425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 05/10/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Ambient temperature is predicted to rise in Saudi Arabia, and how this will impact the health of its population has not been investigated. Saudi Arabia is one of the top ten countries with the highest prevalence of diabetes. The current study investigates the correlation between ambient temperature and HbA1c levels in a group of Saudis in Riyadh. METHODS Age, gender, and HbA1c data for six years were obtained from patients' records. The maximum daily temperature of Riyadh city for the same period was obtained. RESULTS A total of 168,614 patient records were obtained. There was a statistically significant positive correlation between ambient temperature and HbA1c levels, where for each 1°C increase in average weekly temperature HbA1c increased by 0.007%. Patients were at higher risk of having HbA1c ≥ 7% in high and moderate temperature than in low temperature (P < 0.001, odds ratio (OR): 1.134, and P < 0.001, odds ratio (OR): 1.034; respectively). The mean of HbA1c in females (7.27±1.96) was significantly lower than in males (7.40±1.86), and the probability of males having HbA1c ≥ 7% was about 17.4% higher than females. However, the HbA1c levels in females were significantly more affected by rising temperature compared to males (B = 0.003, P = 0.008). CONCLUSION Overall, rise in ambient temperature is associated with worsening HbA1c, which could be harmful to the health of Saudis suffering from diabetes. Possible reasons for the increase in HbA1c could include reduced physical activity, reduced sunlight exposure, and dehydration during hot weather. More research on the relationship between climate change and public health in Saudi Arabia is needed.
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Affiliation(s)
| | | | | | - Richard O Jenkins
- Faculty of Health and Life Sciences, De Montfort UniversityLeicester, UK
| | - Parvez I Haris
- Faculty of Health and Life Sciences, De Montfort UniversityLeicester, UK
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162
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Straat ME, Hogenboom R, Boon MR, Rensen PCN, Kooijman S. Circadian control of brown adipose tissue. Biochim Biophys Acta Mol Cell Biol Lipids 2021; 1866:158961. [PMID: 33933649 DOI: 10.1016/j.bbalip.2021.158961] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 02/07/2023]
Abstract
Disruption of circadian (~24 h) rhythms is associated with an increased risk of cardiometabolic diseases. Therefore, unravelling how circadian rhythms are regulated in different metabolic tissues has become a prominent research focus. Of particular interest is brown adipose tissue (BAT), which combusts triglyceride-derived fatty acids and glucose into heat and displays a circannual and diurnal rhythm in its thermogenic activity. In this review, the genetic, neuronal and endocrine generation of these rhythms in BAT is discussed. In addition, the potential risks of disruption or attenuation of these rhythms in BAT, and possible factors influencing these rhythms, are addressed.
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Affiliation(s)
- Maaike E Straat
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Rick Hogenboom
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Mariëtte R Boon
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Patrick C N Rensen
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands
| | - Sander Kooijman
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands; Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, the Netherlands.
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163
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Mig-6 is essential for glucose homeostasis and thermogenesis in brown adipose tissue. Biochem Biophys Res Commun 2021; 572:92-97. [PMID: 34358969 DOI: 10.1016/j.bbrc.2021.07.088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/23/2021] [Accepted: 07/26/2021] [Indexed: 01/06/2023]
Abstract
Brown adipose tissue (BAT) is an anti-obese and anti-diabetic tissue that stimulates energy expenditure in the form of adaptive thermogenesis through uncoupling protein 1 (UCP1). Mitogen-inducible gene-6 (Mig-6) is a negative regulator of epidermal growth factor receptor (EGFR) that interacts with many cellular partners and has multiple cellular functions. We have recently reported that Mig-6 is associated with diabetes and metabolic syndrome. However, its function in BAT is unknown. We generated a brown adipocyte-specific Mig-6 knock-in mouse (BKI) to examine the role of Mig-6 in BAT. Mig-6 BKI mice had improved glucose tolerance on a normal chow diet. Mig-6 BKI mice also revealed activated thermogenesis and the size of the BAT lipid droplets was reduced. Additionally, Mig-6 regulated cAMP-PKA signaling-induced UCP1 expression in brown adipocytes. Taken together, these results demonstrate that Mig-6 affects glucose tolerance and thermogenesis in BAT.
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164
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Hoffmann A, Ebert T, Hankir MK, Flehmig G, Klöting N, Jessnitzer B, Lössner U, Stumvoll M, Blüher M, Fasshauer M, Tönjes A, Miehle K, Kralisch S. Leptin Improves Parameters of Brown Adipose Tissue Thermogenesis in Lipodystrophic Mice. Nutrients 2021; 13:2499. [PMID: 34444659 PMCID: PMC8399124 DOI: 10.3390/nu13082499] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/16/2021] [Accepted: 07/18/2021] [Indexed: 12/18/2022] Open
Abstract
Lipodystrophy syndromes (LD) are a heterogeneous group of very rare congenital or acquired disorders characterized by a generalized or partial lack of adipose tissue. They are strongly associated with severe metabolic dysfunction due to ectopic fat accumulation in the liver and other organs and the dysregulation of several key adipokines, including leptin. Treatment with leptin or its analogues is therefore sufficient to reverse some of the metabolic symptoms of LD in patients and in mouse models through distinct mechanisms. Brown adipose tissue (BAT) thermogenesis has emerged as an important regulator of systemic metabolism in rodents and in humans, but it is poorly understood how leptin impacts BAT in LD. Here, we show in transgenic C57Bl/6 mice overexpressing sterol regulatory element-binding protein 1c in adipose tissue (Tg (aP2-nSREBP1c)), an established model of congenital LD, that daily subcutaneous administration of 3 mg/kg leptin for 6 to 8 weeks increases body temperature without affecting food intake or body weight. This is associated with increased protein expression of the thermogenic molecule uncoupling protein 1 (UCP1) and the sympathetic nerve marker tyrosine hydroxylase (TH) in BAT. These findings suggest that leptin treatment in LD stimulates BAT thermogenesis through sympathetic nerves, which might contribute to some of its metabolic benefits by providing a healthy reservoir for excess circulating nutrients.
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Affiliation(s)
- Annett Hoffmann
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
- Department of General, Visceral, Transplant, Vascular and Pediatric Surgery, University Hospital Würzburg, 97080 Würzburg, Germany;
| | - Thomas Ebert
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
- Division of Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, 17177 Solna, Sweden
| | - Mohammed K. Hankir
- Department of General, Visceral, Transplant, Vascular and Pediatric Surgery, University Hospital Würzburg, 97080 Würzburg, Germany;
| | - Gesine Flehmig
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
| | - Nora Klöting
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig, 04109 Leipzig, Germany;
| | - Beate Jessnitzer
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
| | - Ulrike Lössner
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
| | - Michael Stumvoll
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
| | - Matthias Blüher
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig, 04109 Leipzig, Germany;
| | - Mathias Fasshauer
- Institute of Nutritional Science, Justus-Liebig-University, 35390 Giessen, Germany;
| | - Anke Tönjes
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
| | - Konstanze Miehle
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
| | - Susan Kralisch
- Medical Department III-Endocrinology, Nephrology, Rheumatology, University of Leipzig Medical Center, 04109 Leipzig, Germany; (T.E.); (G.F.); (B.J.); (U.L.); (M.S.); (M.B.); (A.T.); (K.M.); (S.K.)
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PET/MRI of glucose metabolic rate, lipid content and perfusion in human brown adipose tissue. Sci Rep 2021; 11:14955. [PMID: 34294741 PMCID: PMC8298487 DOI: 10.1038/s41598-021-87768-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 03/15/2021] [Indexed: 11/08/2022] Open
Abstract
This study evaluated the MRI-derived fat fraction (FF), from a Cooling-reheating protocol, for estimating the cold-induced brown adipose tissue (BAT) metabolic rate of glucose (MRglu) and changes in lipid content, perfusion and arterial blood volume (VA) within cervical-supraclavicular fat (sBAT). Twelve volunteers underwent PET/MRI at baseline, during cold exposure and reheating. For each temperature condition, perfusion and VA were quantified with dynamic [15O]water-PET, and FF, with water-fat MRI. MRglu was assessed with dynamic [18F]fluorodeoxyglucose-PET during cold exposure. sBAT was defined using anatomical criteria, and its subregion sBATHI, by MRglu > 11 μmol/100 cm3/min. For all temperature conditions, sBAT-FF correlated negatively with sBAT-MRglu (ρ ≤ - 0.87). After 3 h of cold, sBAT-FF decreased (- 2.13 percentage points) but tended to normalize during reheating although sBATHI-FF remained low. sBAT-perfusion and sBAT-VA increased during cold exposure (perfusion: + 5.2 ml/100 cm3/min, VA: + 4.0 ml/100 cm3). sBAT-perfusion remained elevated and sBAT-VA normalized during reheating. Regardless of temperature condition during the Cooling-reheating protocol, sBAT-FF could predict the cold-induced sBAT-MRglu. The FF decreases observed after reheating were mainly due to lipid consumption, but could potentially be underestimated due to intracellular lipid replenishment. The influence of perfusion and VA, on the changes in FF observed during cold exposure, could not be ruled out.
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Picatoste B, Yammine L, Leahey RA, Soares D, Johnson EF, Cohen P, McGraw TE. Defective insulin-stimulated GLUT4 translocation in brown adipocytes induces systemic glucose homeostasis dysregulation independent of thermogenesis in female mice. Mol Metab 2021; 53:101305. [PMID: 34303022 PMCID: PMC8363886 DOI: 10.1016/j.molmet.2021.101305] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 06/24/2021] [Accepted: 07/14/2021] [Indexed: 01/02/2023] Open
Abstract
OBJECTIVE Recent studies indicate that brown adipose tissue, in addition to its role in thermogenesis, has a role in the regulation of whole-body metabolism. Here we characterize the metabolic effects of deleting Rab10, a protein key for insulin stimulation of glucose uptake into white adipocytes, solely from brown adipocytes. METHODS We used a murine brown adipocyte cell line and stromal vascular fraction-derived in vitro differentiated brown adipocytes to study the role of Rab10 in insulin-stimulated GLUT4 translocation to the plasma membrane and insulin-stimulated glucose uptake. We generated a brown adipocyte-specific Rab10 knockout for in vivo studies of metabolism and thermoregulation. RESULTS We demonstrate that deletion of Rab10 from brown adipocytes results in a two-fold reduction of insulin-stimulated glucose transport by reducing translocation of the GLUT4 glucose transporter to the plasma membrane, an effect linked to whole-body glucose intolerance and insulin resistance in female mice. This effect on metabolism is independent of the thermogenic function of brown adipocytes, thereby revealing a metabolism-specific role for brown adipocytes in female mice. The reduced glucose uptake induced by Rab10 deletion disrupts ChREBP regulation of de novo lipogenesis (DNL) genes, providing a potential link between DNL in brown adipocytes and whole-body metabolic regulation in female mice. However, deletion of Rab10 from male mice does not induce systemic insulin resistance, although ChREBP regulation is disrupted. CONCLUSIONS Our studies of Rab10 reveal the role of insulin-regulated glucose transport into brown adipocytes in whole-body metabolic homeostasis of female mice. Importantly, the contribution of brown adipocytes to whole-body metabolic regulation is independent of its role in thermogenesis. It is unclear whether the whole-body metabolic sexual dimorphism is because female mice are permissive to the effects of Rab10 deletion from brown adipocytes or because male mice are resistant to the effect.
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Affiliation(s)
- Belén Picatoste
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, 10065, USA
| | - Lucie Yammine
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, 10065, USA
| | - Rosemary A. Leahey
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, 10065, USA
| | - David Soares
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, 10065, USA
| | - Emma F. Johnson
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, 10065, USA
| | - Paul Cohen
- Laboratory of Molecular Metabolism, The Rockefeller University, New York, NY, 10065, USA
| | - Timothy E. McGraw
- Department of Biochemistry, Weill Cornell Medical College, New York, NY, 10065, USA,Department of Cardiothoracic Surgery, Weill Cornell Medical College, New York, NY, 10065, USA,Corresponding author. Department of Biochemistry, Weill Cornell Medical College, New York, NY, 10065, USA.
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167
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Induced Beige Adipocytes Improved Fat Graft Retention by Promoting Adipogenesis and Angiogenesis. Plast Reconstr Surg 2021; 148:549-558. [PMID: 34292915 DOI: 10.1097/prs.0000000000008227] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Fat grafting is commonly used in treating soft-tissue defects. However, the basic biology behind fat grafting is still not fully understood. Evidence of adipose browning into beige adipose tissue after fat grafting was revealed, but its role in fat grafting remains unclear. METHODS Induced beige adipocytes and adipose-derived stem cells were obtained from human lipoaspirates and labeled with green fluorescent protein. Nude mice were each injected with 300 mg of human lipoaspirate containing green fluorescent protein-labeled adipose-derived stem cells, green fluorescent protein-labeled induced beige adipocytes, or phosphate-buffered saline. Grafted fat was harvested after 1, 4, 8, and 12 weeks for immunohistochemistry and histologic examination. Graft retention, vascularization, and adipogenic gene expression were compared. RESULTS After 7 days' induction, adipocytes achieved browning with multilocular lipid droplets, increased mitochondria, and up-regulated browning gene expression. Fat graft retention rates at week 12 were significantly higher after injection of induced beige adipocytes than after injection of phosphate-buffered saline (46.0 ± 4.9 percent versus 31.0 ± 3.6 percent; p = 0.01), but were similar after injection of induced beige adipocytes and adipose-derived stem cells (p > 0.05). Induced beige adipocytes underwent rewhitening into white adipocytes and showed up-regulation of peroxisome proliferator-activated receptor-γ expression. Induced beige adipocytes enhanced angiogenesis, but were not active in forming vessel structures. CONCLUSIONS Induced beige adipocytes and adipose-derived stem cells were comparable in improving fat graft retention rates. Induced beige adipocytes promote angiogenesis in a paracrine manner and are prone to rewhitening after fat grafting.
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168
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Calvo E, Keiran N, Núñez-Roa C, Maymó-Masip E, Ejarque M, Sabadell-Basallote J, Del Mar Rodríguez-Peña M, Ceperuelo-Mallafré V, Seco J, Benaiges E, Michalopoulou T, Jorba R, Vendrell J, Fernández-Veledo S. Effects of stem cells from inducible brown adipose tissue on diet-induced obesity in mice. Sci Rep 2021; 11:13923. [PMID: 34230537 PMCID: PMC8260805 DOI: 10.1038/s41598-021-93224-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/16/2021] [Indexed: 11/11/2022] Open
Abstract
Adipose-derived mesenchymal stem cells (ASCs) are a promising option for the treatment of obesity and its metabolic co-morbidities. Despite the recent identification of brown adipose tissue (BAT) as a potential target in the management of obesity, the use of ASCs isolated from BAT as a therapy for patients with obesity has not yet been explored. Metabolic activation of BAT has been shown to have not only thermogenic effects, but it also triggers the secretion of factors that confer protection against obesity. Herein, we isolated and characterized ASCs from the visceral adipose tissue surrounding a pheochromocytoma (IB-hASCs), a model of inducible BAT in humans. We then compared the anti-obesity properties of IB-hASCs and human ASCs isolated from visceral white adipose tissue (W-hASCs) in a murine model of diet-induced obesity. We found that both ASC therapies mitigated the metabolic abnormalities of obesity to a similar extent, including reducing weight gain and improving glucose tolerance. However, infusion of IB-hASCs was superior to W-hASCs in suppressing lipogenic and inflammatory markers, as well as preserving insulin secretion. Our findings provide evidence for the metabolic benefits of visceral ASC infusion and support further studies on IB-hASCs as a therapeutic option for obesity-related comorbidities.
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Affiliation(s)
- Enrique Calvo
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
| | - Noelia Keiran
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
- Universitat Rovira I Virgili, Tarragona, Spain
| | - Catalina Núñez-Roa
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
| | - Elsa Maymó-Masip
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
| | - Miriam Ejarque
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
| | - Joan Sabadell-Basallote
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
- Universitat Rovira I Virgili, Tarragona, Spain
| | - María Del Mar Rodríguez-Peña
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
| | - Victòria Ceperuelo-Mallafré
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
- Universitat Rovira I Virgili, Tarragona, Spain
| | - Jesús Seco
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
| | - Ester Benaiges
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain
- Universitat Rovira I Virgili, Tarragona, Spain
| | - Theodora Michalopoulou
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain
| | - Rosa Jorba
- Servei de Cirurgia General I de L'Aparell Digestiu, Hospital Universitari Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), Tarragona, Spain
| | - Joan Vendrell
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain.
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain.
- Universitat Rovira I Virgili, Tarragona, Spain.
| | - Sonia Fernández-Veledo
- Servei D'Endocrinologia I Nutrició I Unitat de Recerca, Hospital Universitari de Tarragona Joan XXIII, Institut D'Investigació Sanitària Pere Virgili (IISPV), c/ Dr. Mallafré Guasch 4, 43007, Tarragona, Spain.
- CIBER de Diabetes Y Enfermedades Metabólicas Asociadas (CIBERDEM) - Instituto de Salud Carlos III, Madrid, Spain.
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Zhao J, Tao C, Chen C, Wang Y, Liu T. Formation of thermogenic adipocytes: What we have learned from pigs. FUNDAMENTAL RESEARCH 2021. [DOI: 10.1016/j.fmre.2021.05.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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170
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Sanchez-Delgado G, Martinez-Tellez B, Acosta FM, Virtue S, Vidal-Puig A, Gil A, Llamas-Elvira JM, Ruiz JR. Brown Adipose Tissue Volume and Fat Content Are Positively Associated With Whole-Body Adiposity in Young Men-Not in Women. Diabetes 2021; 70:1473-1485. [PMID: 33858825 DOI: 10.2337/db21-0011] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 04/05/2021] [Indexed: 11/13/2022]
Abstract
Human brown adipose tissue (BAT) volume has consistently been claimed to be inversely associated with whole-body adiposity. However, recent advances in the assessment of human BAT suggest that previously reported associations may have been biased. The present cross-sectional study investigates the association of BAT volume, mean radiodensity, and 18F-fluorodeoxyglucose (18F-FDG) uptake (assessed via a static positron emission tomography [PET]-computed tomography [CT] scan after a 2-h personalized cold exposure) with whole-body adiposity (measured by DXA) in 126 young adults (42 men and 84 women; mean ± SD BMI 24.9 ± 4.7 kg/m2). BAT volume, but not 18F-FDG uptake, was positively associated with BMI, fat mass, and visceral adipose tissue (VAT) mass in men but not in women. These associations were independent of the date when the PET-CT was performed, insulin sensitivity, and body surface area. BAT mean radiodensity, an inverse proxy of BAT fat content, was negatively associated with BMI, fat mass, and VAT mass in men and in women. These results refute the widely held belief that human BAT volume is reduced in obese persons, at least in young adults, and suggest that it might even be the opposite in young men.
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Affiliation(s)
- Guillermo Sanchez-Delgado
- PROFITH "PROmoting FITness and Health through Physical Activity" Research Group, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Pennington Biomedical Research Center, Baton Rouge, LA
| | - Borja Martinez-Tellez
- PROFITH "PROmoting FITness and Health through Physical Activity" Research Group, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain
- Department of Medicine, Division of Endocrinology, Leiden University Medical Center, Leiden, the Netherlands
| | - Francisco M Acosta
- PROFITH "PROmoting FITness and Health through Physical Activity" Research Group, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain
| | - Samuel Virtue
- The University of Cambridge Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, U.K
| | - Antonio Vidal-Puig
- The University of Cambridge Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, U.K
- Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, U.K
| | - Angel Gil
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology, Centre for Biomedical Research, University of Granada, Granada, Spain
- CIBEROBN, Carlos III Health Institute, Madrid, Spain
| | - Jose M Llamas-Elvira
- Nuclear Medicine Services, "Virgen de las Nieves" University Hospital, Granada, Spain
- Biohealth Research Institute in Granada (ibs.GRANADA), Granada, Spain
| | - Jonatan R Ruiz
- PROFITH "PROmoting FITness and Health through Physical Activity" Research Group, Sport and Health University Research Institute (iMUDS), Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain
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Samms RJ, Christe ME, Collins KA, Pirro V, Droz BA, Holland AK, Friedrich JL, Wojnicki S, Konkol DL, Cosgrove R, Furber EPC, Ruan X, O'Farrell LS, Long AM, Dogra M, Willency JA, Lin Y, Ding L, Cheng CC, Cabrera O, Briere DA, Alsina-Fernandez J, Gimeno RE, Moyers JS, Coskun T, Coghlan MP, Sloop KW, Roell WC. GIPR agonism mediates weight-independent insulin sensitization by tirzepatide in obese mice. J Clin Invest 2021; 131:146353. [PMID: 34003802 DOI: 10.1172/jci146353] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 05/05/2021] [Indexed: 01/01/2023] Open
Abstract
Tirzepatide (LY3298176), a dual GIP and GLP-1 receptor (GLP-1R) agonist, delivered superior glycemic control and weight loss compared with GLP-1R agonism in patients with type 2 diabetes. However, the mechanism by which tirzepatide improves efficacy and how GIP receptor (GIPR) agonism contributes is not fully understood. Here, we show that tirzepatide is an effective insulin sensitizer, improving insulin sensitivity in obese mice to a greater extent than GLP-1R agonism. To determine whether GIPR agonism contributes, we compared the effect of tirzepatide in obese WT and Glp-1r-null mice. In the absence of GLP-1R-induced weight loss, tirzepatide improved insulin sensitivity by enhancing glucose disposal in white adipose tissue (WAT). In support of this, a long-acting GIPR agonist (LAGIPRA) was found to enhance insulin sensitivity by augmenting glucose disposal in WAT. Interestingly, the effect of tirzepatide and LAGIPRA on insulin sensitivity was associated with reduced branched-chain amino acids (BCAAs) and ketoacids in the circulation. Insulin sensitization was associated with upregulation of genes associated with the catabolism of glucose, lipid, and BCAAs in brown adipose tissue. Together, our studies show that tirzepatide improved insulin sensitivity in a weight-dependent and -independent manner. These results highlight how GIPR agonism contributes to the therapeutic profile of dual-receptor agonism, offering mechanistic insights into the clinical efficacy of tirzepatide.
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172
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The Hormetic Effect of Metformin: "Less Is More"? Int J Mol Sci 2021; 22:ijms22126297. [PMID: 34208371 PMCID: PMC8231127 DOI: 10.3390/ijms22126297] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/06/2021] [Accepted: 06/10/2021] [Indexed: 02/06/2023] Open
Abstract
Metformin (MTF) is the first-line therapy for type 2 diabetes (T2DM). The euglycemic effect of MTF is due to the inhibition of hepatic glucose production. Literature reports that the principal molecular mechanism of MTF is the activation of 5′-AMP-activated protein kinase (AMPK) due to the decrement of ATP intracellular content consequent to the inhibition of Complex I, although this effect is obtained only at millimolar concentrations. Conversely, micromolar MTF seems to activate the mitochondrial electron transport chain, increasing ATP production and limiting oxidative stress. This evidence sustains the idea that MTF exerts a hormetic effect based on its concentration in the target tissue. Therefore, in this review we describe the effects of MTF on T2DM on the principal target organs, such as liver, gut, adipose tissue, endothelium, heart, and skeletal muscle. In particular, data indicate that all organs, except the gut, accumulate MTF in the micromolar range when administered in therapeutic doses, unmasking molecular mechanisms that do not depend on Complex I inhibition.
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173
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Gallardo-Montejano VI, Yang C, Hahner L, McAfee JL, Johnson JA, Holland WL, Fernandez-Valdivia R, Bickel PE. Perilipin 5 links mitochondrial uncoupled respiration in brown fat to healthy white fat remodeling and systemic glucose tolerance. Nat Commun 2021; 12:3320. [PMID: 34083525 PMCID: PMC8175597 DOI: 10.1038/s41467-021-23601-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/28/2021] [Indexed: 02/06/2023] Open
Abstract
Exposure of mice or humans to cold promotes significant changes in brown adipose tissue (BAT) with respect to histology, lipid content, gene expression, and mitochondrial mass and function. Herein we report that the lipid droplet coat protein Perilipin 5 (PLIN5) increases markedly in BAT during exposure of mice to cold. To understand the functional significance of cold-induced PLIN5, we created and characterized gain- and loss-of-function mouse models. Enforcing PLIN5 expression in mouse BAT mimics the effects of cold with respect to mitochondrial cristae packing and uncoupled substrate-driven respiration. PLIN5 is necessary for the maintenance of mitochondrial cristae structure and respiratory function during cold stress. We further show that promoting PLIN5 function in BAT is associated with healthy remodeling of subcutaneous white adipose tissue and improvements in systemic glucose tolerance and diet-induced hepatic steatosis. These observations will inform future strategies that seek to exploit thermogenic adipose tissue as a therapeutic target for type 2 diabetes, obesity, and nonalcoholic fatty liver disease. Perilipin 5 is a lipid droplet protein that interacts with PGC1α in the nucleus to regulate mitochondrial metabolism. Here the authors use genetically engineered mouse models to determine the physiologic role of Perilipin 5, and show that it regulates mitochondrial adaptations to cold, as well as systemic energy metabolism.
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Affiliation(s)
- Violeta I Gallardo-Montejano
- Division of Endocrinology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Chaofeng Yang
- Division of Endocrinology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Lisa Hahner
- Division of Endocrinology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - John L McAfee
- Division of Endocrinology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA.,Pathology and Laboratory Medicine Institute, Cleveland, OH, USA
| | - Joshua A Johnson
- Touchstone Diabetes Center, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - William L Holland
- Touchstone Diabetes Center, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of Nutrition and Integrative Physiology and the Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
| | | | - Perry E Bickel
- Division of Endocrinology, Department of Internal Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA.
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174
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Li BH, Zhang M, Duan YN, Shuai L, Jiang HW, Li J, Nan FJ, Li JY. Pyrazolone derivative C29 protects against HFD-induced obesity in mice via activation of AMPK in adipose tissue. Acta Pharmacol Sin 2021; 42:964-974. [PMID: 32934347 PMCID: PMC8149820 DOI: 10.1038/s41401-020-00524-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 08/27/2020] [Indexed: 12/31/2022] Open
Abstract
Beige adipocytes have been considered as a potential strategy in anti-obesity therapy because of its thermogenic capacity. AMP-activated protein kinase (AMPK) plays important roles in regulating adipose tissue function. C29 is a novel pyrazolone derivative with AMPK activity. In the current study, we investigated the role of C29 in the regulation of thermogenesis using differentiated adipocytes and diet-induced obese mice, and explored the mechanisms that might be involved in energy expenditure via adipocyte AMPK activation. We showed that treatment with C29 (2.5-10 μM) concentration-dependently increased thermogenesis in differentiated preadipocytes separated from inguinal white adipose tissue (iWAT), evidenced by increased expression levels of thermogenesis markers such as Ucp1, Pgc-1α, Dio2, Prdm16, Cox7a1, Cox8b, Elovl3, and Cidea, fatty acid oxidation (FAO) genes including Cpt1a, Lcad and Pparα, as well as beige-selective genes such as Cd137, Tmem26, Slc27a1, and Tbx1. In high-fat diet (HFD)-fed mice, oral administration of C29 (30 mg·kg-1·day-1) for 9 weeks alleviated HFD-induced obesity, promoted energy expenditure and modulated iWAT browning. However, these effects were not observed in adipose-specific AMPKα1/α2 knockout (AKO) mice following C29 administration. Together, this study demonstrates that C29 regulates energy balance via adipocyte AMPK. Our findings show that the discovery of AMPK activators that specifically target adipose tissue may have therapeutic potential for treating obesity-related metabolic diseases.
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Affiliation(s)
- Bo-Han Li
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mei Zhang
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Ya-Nan Duan
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Lin Shuai
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Hao-Wen Jiang
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Jia Li
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fa-Jun Nan
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
| | - Jing-Ya Li
- State Key Laboratory of Drug Research, the National Drug Screening Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
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175
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Félix-Soriano E, Sáinz N, Gil-Iturbe E, Collantes M, Fernández-Galilea M, Castilla-Madrigal R, Ly L, Dalli J, Moreno-Aliaga MJ. Changes in brown adipose tissue lipid mediator signatures with aging, obesity, and DHA supplementation in female mice. FASEB J 2021; 35:e21592. [PMID: 33960028 DOI: 10.1096/fj.202002531r] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 03/12/2021] [Accepted: 03/26/2021] [Indexed: 12/11/2022]
Abstract
Brown adipose tissue (BAT) dysfunction in aging and obesity has been related to chronic unresolved inflammation, which could be mediated by an impaired production of specialized proresolving lipid mediators (SPMs), such as Lipoxins-LXs, Resolvins-Rvs, Protectins-PDs, and Maresins-MaRs. Our aim was to characterize the changes in BAT SPMs signatures and their association with BAT dysfunction during aging, especially under obesogenic conditions, and their modulation by a docosahexaenoic acid (DHA)-rich diet. Lipidomic, functional, and molecular studies were performed in BAT of 2- and 18-month-old lean (CT) female mice and in 18-month-old diet-induced obese (DIO) mice fed with a high-fat diet (HFD), or a DHA-enriched HFD. Aging downregulated Prdm16 and UCP1 levels, especially in DIO mice, while DHA partially restored them. Arachidonic acid (AA)-derived LXs and DHA-derived MaRs and PDs were the most abundant SPMs in BAT of young CT mice. Interestingly, the sum of LXs and of PDs were significantly lower in aged DIO mice compared to young CT mice. Some of the SPMs most significantly reduced in obese-aged mice included LXB4 , MaR2, 4S,14S-diHDHA, 10S,17S-diHDHA (a.k.a. PDX), and RvD6. In contrast, DHA increased DHA-derived SPMs, without modifying LXs. However, MicroPET studies showed that DHA was not able to counteract the impaired cold exposure response in BAT of obese-aged mice. Our data suggest that a defective SPMs production could underlie the decrease of BAT activity observed in obese-aged mice, and highlight the relevance to further characterize the physiological role and therapeutic potential of specific SPMs on BAT development and function.
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Affiliation(s)
- Elisa Félix-Soriano
- Center for Nutrition Research, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Department of Nutrition, Food Science and Physiology, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
| | - Neira Sáinz
- Center for Nutrition Research, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Department of Nutrition, Food Science and Physiology, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
| | - Eva Gil-Iturbe
- Center for Nutrition Research, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Department of Nutrition, Food Science and Physiology, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
| | - María Collantes
- Radiopharmacy, Radionanopharmacology and Translational Molecular Imaging Research Group, Clínica Universidad de Navarra, Pamplona, Spain
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Marta Fernández-Galilea
- Center for Nutrition Research, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Department of Nutrition, Food Science and Physiology, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Rosa Castilla-Madrigal
- Center for Nutrition Research, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Department of Nutrition, Food Science and Physiology, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
| | - Lucy Ly
- William Harvey Research Institute, Queen Mary University of London, London, UK
| | - Jesmond Dalli
- William Harvey Research Institute, Queen Mary University of London, London, UK
- Center for Inflammation and Therapeutic Innovation, Queen Mary University of London, London, UK
| | - María J Moreno-Aliaga
- Center for Nutrition Research, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Department of Nutrition, Food Science and Physiology, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
- CIBER Physiopathology of Obesity and Nutrition (CIBERobn), Instituto de Salud Carlos III (ISCIII), Madrid, Spain
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Cohen P, Kajimura S. The cellular and functional complexity of thermogenic fat. Nat Rev Mol Cell Biol 2021; 22:393-409. [PMID: 33758402 PMCID: PMC8159882 DOI: 10.1038/s41580-021-00350-0] [Citation(s) in RCA: 208] [Impact Index Per Article: 69.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/08/2021] [Indexed: 02/01/2023]
Abstract
Brown and beige adipocytes are mitochondria-enriched cells capable of dissipating energy in the form of heat. These thermogenic fat cells were originally considered to function solely in heat generation through the action of the mitochondrial protein uncoupling protein 1 (UCP1). In recent years, significant advances have been made in our understanding of the ontogeny, bioenergetics and physiological functions of thermogenic fat. Distinct subtypes of thermogenic adipocytes have been identified with unique developmental origins, which have been increasingly dissected in cellular and molecular detail. Moreover, several UCP1-independent thermogenic mechanisms have been described, expanding the role of these cells in energy homeostasis. Recent studies have also delineated roles for these cells beyond the regulation of thermogenesis, including as dynamic secretory cells and as a metabolic sink. This Review presents our current understanding of thermogenic adipocytes with an emphasis on their development, biological functions and roles in systemic physiology.
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Affiliation(s)
- Paul Cohen
- Laboratory of Molecular Metabolism, The Rockefeller University, New York, NY, USA.
| | - Shingo Kajimura
- Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
- Department of Cell and Tissue Biology, UCSF Diabetes Center, University of California, San Francisco, San Francisco, CA, USA.
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177
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Singh P, Reza MI, Syed AA, Husain A, Katekar R, Gayen JR. Pancreastatin mediated regulation of UCP-1 and energy expenditure in high fructose fed perimenopausal rats. Life Sci 2021; 279:119677. [PMID: 34081990 DOI: 10.1016/j.lfs.2021.119677] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/19/2021] [Accepted: 05/27/2021] [Indexed: 12/13/2022]
Abstract
AIMS Pancreastatin (PST) is a crucial bioactive peptide derived from chromogranin A (CHGA) proprotein that exhibits an anti-insulin effect on adipocytes. Herein, we investigated the effects of PST on brown adipose tissues (BAT) and white adipose tissue (WAT) in connection with uncoupling protein-1 (UCP-1) regulated energy expenditure in high fructose diet (HFrD) fed and vinylcyclohexenediepoxide (VCD) induced perimenopausal rats. MATERIAL AND METHODS We administered VCD in rats for 17 consecutive days and fed HFrd for 12 weeks. After 12 weeks estradiol and progesterone levels were detected. Furthermore, detection of glucose tolerance, insulin sensitivity, and body composition revealed impaired glucose homeostasis and enhanced PST levels. Effects of enhanced PST on UCP-1 level in BAT and WAT of perimenopausal rats were further investigated. KEY FINDINGS Reduced serum estradiol, progesterone, and attenuated insulin response confirmed perimenopausal model development. Furthermore, enhanced PST serum level and its increased expression in BAT and WAT downregulated the UCP-1 expression. Subsequently, impaired ATP level, NADP/NADPH ratio, citrate synthase activity, enhanced mitochondrial reactive oxygen species (ROS) generation and perturbed mitochondrial membrane potential, further exacerbated mitochondrial dysfunction, cellular ROS production, and promoted apoptosis. Interestingly, PST inhibition by PST inhibitor peptide-8 (PSTi8) displayed a favorable impact on UCP-1 and energy expenditure. SIGNIFICANCE The aforementioned outcomes indicated the substantial role of PST in altering the UCP-1 expression and associated energy homeostasis. Hence our results corroborate novel avenues to unravel the quest deciphering PST's role in energy homeostasis and its association with perimenopause.
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Affiliation(s)
- Pragati Singh
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Mohammad Irshad Reza
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Anees A Syed
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Athar Husain
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Roshan Katekar
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jiaur R Gayen
- Pharmaceutics & Pharmacokinetics Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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178
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Zekri Y, Flamant F, Gauthier K. Central vs. Peripheral Action of Thyroid Hormone in Adaptive Thermogenesis: A Burning Topic. Cells 2021; 10:1327. [PMID: 34071979 PMCID: PMC8229489 DOI: 10.3390/cells10061327] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/18/2021] [Accepted: 05/25/2021] [Indexed: 12/12/2022] Open
Abstract
Thyroid hormones (TH) contribute to the control of adaptive thermogenesis, which is associated with both higher energy expenditure and lower body mass index. While it was clearly established that TH act directly in the target tissues to fulfill its metabolic activities, some studies have rather suggested that TH act in the hypothalamus to control these processes. This paradigm shift has subjected the topic to intense debates. This review aims to recapitulate how TH control adaptive thermogenesis and to what extent the brain is involved in this process. This is of crucial importance for the design of new pharmacological agents that would take advantage of the TH metabolic properties.
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Affiliation(s)
- Yanis Zekri
- Institut de Génomique Fonctionnelle de Lyon, Univ Lyon, CNRS UMR 5242, INRAE USC 1370 École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, 46 allée d’Italie, 69007 Lyon, France; (F.F.); (K.G.)
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179
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Kuroiwa M, Hamaoka-Fuse S, Sugimoto M, Kurosawa Y, Aita Y, Tomita A, Anjo M, Tanaka R, Endo T, Kime R, Hamaoka T. Correlation of Plasma Amino Acid and Anthropometric Profiles with Brown Adipose Tissue Density in Humans. J Clin Med 2021; 10:jcm10112339. [PMID: 34071816 PMCID: PMC8199240 DOI: 10.3390/jcm10112339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/19/2021] [Accepted: 05/24/2021] [Indexed: 12/14/2022] Open
Abstract
This study examined the relationship between plasma amino acid (AA) concentrations, including branched-chain AAs, and brown adipose tissue density (BAT-d). One hundred and seventy-three subjects (69 men, 104 women) aged 22-68 years were recruited during the winter season. AAs were comprehensively quantified using liquid chromatography-time-of-flight-mass spectrometry. The total hemoglobin concentration in the supraclavicular region ([total-Hb]sup), an indicator of BAT-d, was assessed using near-infrared time-resolved spectroscopy. Anthropometric parameters, including age, percentage of body fat, and visceral fat, were evaluated. Factors associated with higher (≥74 µM) or lower (<74 µM) [total-Hb]sup were investigated by multiple logistic regression models that included AA concentrations alone (model 1) or AA concentrations and anthropometric parameters (model 2) as independent variables. When adjusted for the false discovery rate, [total-Hb]sup was positively correlated with glycine and asparagine levels in men and with the serine level in both men and women and was negatively correlated with the branched-chain AA concentration in men. Models 1 and 2 correlated with higher or lower BAT-d for men (r = 0.73, p = 0.015) and women (r = 0.58, p = 0.079) and for men (r = 0.82, p = 0.0070) and women (r = 0.70, p = 0.020), respectively. A combination of anthropometric parameters and plasma AA concentrations could be a reliable biomarker for higher and lower BAT-d.
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Affiliation(s)
- Miyuki Kuroiwa
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
| | - Sayuri Hamaoka-Fuse
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
| | - Masahiro Sugimoto
- Research and Development Center for Minimally Invasive Therapies, Institute of Medical Science, Tokyo Medical University, Tokyo 160-8402, Japan; (M.S.); (Y.A.); (A.T.)
| | - Yuko Kurosawa
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
| | - Yasuko Aita
- Research and Development Center for Minimally Invasive Therapies, Institute of Medical Science, Tokyo Medical University, Tokyo 160-8402, Japan; (M.S.); (Y.A.); (A.T.)
| | - Atsumi Tomita
- Research and Development Center for Minimally Invasive Therapies, Institute of Medical Science, Tokyo Medical University, Tokyo 160-8402, Japan; (M.S.); (Y.A.); (A.T.)
| | - Mikiko Anjo
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
| | - Riki Tanaka
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
| | - Tasuki Endo
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
| | - Ryotaro Kime
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
| | - Takafumi Hamaoka
- Department of Sports Medicine for Health Promotion, Tokyo Medical University, Tokyo 160-8402, Japan; (M.K.); (S.H.-F.); (Y.K.); (M.A.); (R.T.); (T.E.); (R.K.)
- Correspondence:
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180
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Nazeri A, Crandall JP, Fraum TJ, Wahl RL. Repeatability of Radiomic Features of Brown Adipose Tissue. J Nucl Med 2021; 62:700-706. [PMID: 33037091 DOI: 10.2967/jnumed.120.248674] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 09/09/2020] [Indexed: 12/21/2022] Open
Abstract
The aim of this study was to assess the repeatability of activated brown adipose tissue (BAT) radiomic features. To decipher radiomic features that may provide useful information on BAT, the impact of reconstruction methods and imaging modality choice was also evaluated. Methods: Twenty-seven healthy adults enrolled in this study. After a cooling procedure to activate BAT, volunteers underwent 18F-FDG imaging. Participants underwent repeat imaging using the same imaging protocols and a similar 18F-FDG dose within 14 d. Active BAT was segmented using the BARCIST 1.0 methods. Radiomic features were extracted from each region of interest on high-definition PET (HD PET), non-HD PET, and CT images. Lin's concordance correlation coefficient was used to estimate the repeatability of the extracted radiomic features. To determine whether BAT radiomic feature repeatability correlates with BAT SUVmax repeatability, participants were stratified based on the relative difference in SUVmax between sessions. Non-HD PET repeatable features were clustered together using hierarchical clustering, and the normalized dynamic range of each feature was computed to identify the most informative feature within each cluster. Results: Eighteen of the 27 volunteers had sufficient BAT activity for radiomic analysis. Sixty-six HD PET, 66 non-HD PET, and 6 CT features showed high repeatability (concordance correlation coefficient ≥ 0.80). Feature repeatability was significantly higher for PET than for CT, but there was no statistically significant difference between HD and non-HD PET in radiomic feature repeatability. The repeatability of radiomic features extracted from each modality and reconstruction method type followed the trend in SUVmax, as participants with lower relative differences in SUVmax between initial and repeated imaging sessions had higher radiomic feature repeatability. Hierarchical clustering of the high-repeatability PET features resulted in 10 highly correlated clusters (R 2 ≥ 0.95). Seven features, including SUVmax, did not cluster with any other features. Conclusion: Several clusters of highly repeatable BAT radiomic features derived from 18F-FDG PET/CT appear to provide information regarding BAT activity distinct from SUVmax These features might be explored as quantitative imaging biomarkers of BAT activity in future studies.
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Affiliation(s)
- Aria Nazeri
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - John P Crandall
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Tyler J Fraum
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Richard L Wahl
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri
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181
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Maternal Brown Fat Thermogenesis Programs Glucose Tolerance in the Male Offspring. Cell Rep 2021; 33:108351. [PMID: 33147454 DOI: 10.1016/j.celrep.2020.108351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 08/07/2020] [Accepted: 10/14/2020] [Indexed: 12/17/2022] Open
Abstract
Environmental temperature is a driving factor in evolution, and it is commonly assumed that metabolic adaptations to cold climates are the result of transgenerational selection. Here, we show in mice that even minor changes in maternal thermogenesis alter the metabolic phenotype already in the next generation. Male offspring of mothers genetically lacking brown adipose tissue (BAT) thermogenesis display increased lean mass and improved glucose tolerance as adults, while females are unaffected. The phenotype is replicated in offspring of mothers kept at thermoneutrality; conversely, mothers with higher gestational BAT thermogenesis produce male offspring with reduced lean mass and impaired glucose tolerance. Running-wheel exercise reverses the offspring's metabolic impairments, pointing to the muscle as target of these fetal programming effects. Our data demonstrate that gestational BAT activation negatively affects metabolic health of the male offspring; however, these unfavorable fetal programming effects may be negated by active lifestyle.
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182
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Le Y, Zhang Z, Wang C, Lu D. Ferroptotic Cell Death: New Regulatory Mechanisms for Metabolic Diseases. Endocr Metab Immune Disord Drug Targets 2021; 21:785-800. [DOI: 10.2174/1871530320666200731175328] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 11/22/2022]
Abstract
Background:
Cell death is a fundamental biological phenomenon that contributes to the
pathogenesis of various diseases. Regulation of iron and iron metabolism has received considerable
research interests especially concerning the progression of metabolic diseases.
Discussion:
Emerging evidence shows that ferroptosis, a non-apoptotic programmed cell death induced by iron-dependent
lipid peroxidation, contributes to the development of complex diseases such as non-alcoholic steatohepatitis, cardiomyopathy, renal ischemia-reperfusion, and neurodegenerative diseases. Therefore, inhibiting ferroptosis can improve the pathophysiology of associated metabolic diseases. This review describes the vital role of ferroptosis in mediating the development
of certain metabolic diseases. Besides, the potential risk of iron and ferroptosis in atherosclerosis and cardiovascular diseases is also described. Iron overload and ferroptosis are potential secondary causes of death in metabolic diseases. Moreover,
this review also provides potential novel approaches against ferroptosis based on recent research advances.
Conclusion:
Several controversies exist concerning mechanisms underlying ferroptotic cell death in metabolic diseases, particularly in atherosclerosis. Since ferroptosis participates in the progression of metabolic diseases such as non-alcoholic steatohepatitis (NASH), there is a need to develop new drugs targeting ferroptosis to alleviate such diseases.
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Affiliation(s)
- Yifei Le
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhijie Zhang
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Cui Wang
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Dezhao Lu
- College of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
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183
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McNeill BT, Suchacki KJ, Stimson RH. MECHANISMS IN ENDOCRINOLOGY: Human brown adipose tissue as a therapeutic target: warming up or cooling down? Eur J Endocrinol 2021; 184:R243-R259. [PMID: 33729178 PMCID: PMC8111330 DOI: 10.1530/eje-20-1439] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/10/2021] [Indexed: 12/12/2022]
Abstract
Excessive accumulation of white adipose tissue leads to obesity and its associated metabolic health consequences such as type 2 diabetes and cardiovascular disease. Several approaches to treat or prevent obesity including public health interventions, surgical weight loss, and pharmacological approaches to reduce caloric intake have failed to substantially modify the increasing prevalence of obesity. The (re-)discovery of active brown adipose tissue (BAT) in adult humans approximately 15 years ago led to a resurgence in research into whether BAT activation could be a novel therapy for the treatment of obesity. Upon cold stimulus, BAT activates and generates heat to maintain body temperature, thus increasing energy expenditure. Activation of BAT may provide a unique opportunity to increase energy expenditure without the need for exercise. However, much of the underlying mechanisms surrounding BAT activation are still being elucidated and the effectiveness of BAT as a therapeutic target has not been realised. Research is ongoing to determine how best to expand BAT mass and activate existing BAT; approaches include cold exposure, pharmacological stimulation using sympathomimetics, browning agents that induce formation of thermogenic beige adipocytes in white adipose depots, and the identification of factors secreted by BAT with therapeutic potential. In this review, we discuss the caloric capacity and other metabolic benefits from BAT activation in humans and the role of metabolic tissues such as skeletal muscle in increasing energy expenditure. We discuss the potential of current approaches and the challenges of BAT activation as a novel strategy to treat obesity and metabolic disorders.
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Affiliation(s)
- Ben T McNeill
- University/BHF Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
| | - Karla J Suchacki
- University/BHF Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
| | - Roland H Stimson
- University/BHF Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
- Correspondence should be addressed to R H Stimson Email
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Mori H, Dugan CE, Nishii A, Benchamana A, Li Z, Cadenhead TS, Das AK, Evans CR, Overmyer KA, Romanelli SM, Peterson SK, Bagchi DP, Corsa CA, Hardij J, Learman BS, El Azzouny M, Coon JJ, Inoki K, MacDougald OA. The molecular and metabolic program by which white adipocytes adapt to cool physiologic temperatures. PLoS Biol 2021; 19:e3000988. [PMID: 33979328 PMCID: PMC8143427 DOI: 10.1371/journal.pbio.3000988] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 05/24/2021] [Accepted: 04/14/2021] [Indexed: 02/07/2023] Open
Abstract
Although visceral adipocytes located within the body's central core are maintained at approximately 37°C, adipocytes within bone marrow, subcutaneous, and dermal depots are found primarily within the peripheral shell and generally exist at cooler temperatures. Responses of brown and beige/brite adipocytes to cold stress are well studied; however, comparatively little is known about mechanisms by which white adipocytes adapt to temperatures below 37°C. Here, we report that adaptation of cultured adipocytes to 31°C, the temperature at which distal marrow adipose tissues and subcutaneous adipose tissues often reside, increases anabolic and catabolic lipid metabolism, and elevates oxygen consumption. Cool adipocytes rely less on glucose and more on pyruvate, glutamine, and, especially, fatty acids as energy sources. Exposure of cultured adipocytes and gluteal white adipose tissue (WAT) to cool temperatures activates a shared program of gene expression. Cool temperatures induce stearoyl-CoA desaturase-1 (SCD1) expression and monounsaturated lipid levels in cultured adipocytes and distal bone marrow adipose tissues (BMATs), and SCD1 activity is required for acquisition of maximal oxygen consumption at 31°C.
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Affiliation(s)
- Hiroyuki Mori
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Colleen E. Dugan
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Akira Nishii
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Ameena Benchamana
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Ziru Li
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Thomas S. Cadenhead
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Arun K. Das
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Charles R. Evans
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Katherine A. Overmyer
- Morgridge Institute for Research, Madison, Wisconsin, United States of America
- National Center for Quantitative Biology of Complex Systems, Madison, Wisconsin, United States of America
| | - Steven M. Romanelli
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Sydney K. Peterson
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Devika P. Bagchi
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Callie A. Corsa
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Julie Hardij
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Brian S. Learman
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Mahmoud El Azzouny
- Agilent Technologies, Inc., Santa Clara, California, United States of America
| | - Joshua J. Coon
- Morgridge Institute for Research, Madison, Wisconsin, United States of America
- National Center for Quantitative Biology of Complex Systems, Madison, Wisconsin, United States of America
- Department of Biomolecular Chemistry, University of Wisconsin, Madison, Wisconsin, United States of America
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Ken Inoki
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Ormond A. MacDougald
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
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185
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Von Bank H, Kirsh C, Simcox J. Aging adipose: Depot location dictates age-associated expansion and dysfunction. Ageing Res Rev 2021; 67:101259. [PMID: 33515751 PMCID: PMC8379680 DOI: 10.1016/j.arr.2021.101259] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/09/2020] [Accepted: 01/18/2021] [Indexed: 02/08/2023]
Abstract
Adipose tissue has a variety of diverse functions that maintain energy homeostasis. In conditions of excess energy availability, adipose tissue increases its lipid storage and communicates the nutritional abundance to various organs in the body. In conditions of energy depletion, such as fasting, cold exposure, or prolonged exercise, triglycerides stored in adipose tissue are released as free fatty acids to support the shift to catabolic metabolism. These diverse functions of storage, communication, and energy homeostasis are shared between numerous adipose depots including subcutaneous, visceral, brown, beige, intramuscular, marrow, and dermal adipose tissue. As organisms age, the cellular composition of these depots shifts to facilitate increased inflammatory cell infiltration, decreased vasculature, and increased adipocyte quantity and lipid droplet size. The purpose of this review is to give a comprehensive overview of the molecular and cellular changes that occur in various aged adipose depots and discuss their impact on physiology. The molecular signature of aged adipose leads to higher prevalence of metabolic disease in aged populations including type 2 diabetes, cardiovascular disease, Alzheimer's disease, and certain types of cancer.
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Affiliation(s)
- Helaina Von Bank
- Department of Biochemistry, University of Wisconsin Madison, USA.
| | - Charlie Kirsh
- Department of Biochemistry, University of Wisconsin Madison, USA.
| | - Judith Simcox
- Department of Biochemistry, University of Wisconsin Madison, USA.
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Overexpression of translationally controlled tumor protein ameliorates metabolic imbalance and increases energy expenditure in mice. Int J Obes (Lond) 2021; 45:1576-1587. [PMID: 33931746 PMCID: PMC8236403 DOI: 10.1038/s41366-021-00821-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 02/07/2021] [Accepted: 04/08/2021] [Indexed: 12/16/2022]
Abstract
Background/Objectives Translationally controlled tumor protein (TCTP) exhibits numerous biological functions. It has been shown to be involved in the regulation of glucose. However, its specific role in metabolism has not yet been clearly elucidated. Here, we aimed to assess the effect of TCTP overexpression on metabolic tissues and systemic energy metabolism. Subjects/Methods We investigated whether TCTP can ameliorate the metabolic imbalance that causes obesity using TCTP-overexpressing transgenic (TCTP TG) mice. The mice were subjected to biochemical, morphological, physiological and protein expression studies to define the role of TCTP in metabolic regulation in response to normal chow diet (NCD) compared to high-fat diet (HFD) conditions, and cold environment. Results We found that TCTP TG mice show improved metabolic homeostasis under both of NCD and HFD conditions with simultaneous enhancements in glucose tolerance and insulin sensitivity. In particular, we found coincident increases in energy expenditure with significant upregulation of uncoupling protein 1 (UCP1) in the brown adipose tissue (BAT). Moreover, TCTP overexpressing mice exhibit significantly enhanced adaptive thermogenesis of BAT in response to cold exposure. Conclusions Overexpression of TCTP ameliorated systemic metabolic homeostasis by stimulating UCP1-mediated thermogenesis in the BAT. This suggests that TCTP may function as a modulator of energy expenditure. This study suggests TCTP may serve as a therapeutic target for obesity and obesity-associated metabolic disorders including type 2 diabetes.
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Verduci E, Calcaterra V, Di Profio E, Fiore G, Rey F, Magenes VC, Todisco CF, Carelli S, Zuccotti GV. Brown Adipose Tissue: New Challenges for Prevention of Childhood Obesity. A Narrative Review. Nutrients 2021; 13:nu13051450. [PMID: 33923364 PMCID: PMC8145569 DOI: 10.3390/nu13051450] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/14/2021] [Accepted: 04/21/2021] [Indexed: 02/06/2023] Open
Abstract
Pediatric obesity remains a challenge in modern society. Recently, research has focused on the role of the brown adipose tissue (BAT) as a potential target of intervention. In this review, we revised preclinical and clinical works on factors that may promote BAT or browning of white adipose tissue (WAT) from fetal age to adolescence. Maternal lifestyle, type of breastfeeding and healthy microbiota can affect the thermogenic activity of BAT. Environmental factors such as exposure to cold or physical activity also play a role in promoting and activating BAT. Most of the evidence is preclinical, although in clinic there is some evidence on the role of omega-3 PUFAs (EPA and DHA) supplementation on BAT activation. Clinical studies are needed to dissect the early factors and their modulation to allow proper BAT development and functions and to prevent onset of childhood obesity.
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Affiliation(s)
- Elvira Verduci
- Department of Health Sciences, University of Milan, 20146 Milan, Italy
- Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy; (V.C.); (E.D.P.); (G.F.); (V.C.M.); (C.F.T.); (G.V.Z.)
- Correspondence: (E.V.); (S.C.)
| | - Valeria Calcaterra
- Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy; (V.C.); (E.D.P.); (G.F.); (V.C.M.); (C.F.T.); (G.V.Z.)
- Pediatric and Adolescent Unit, Department of Internal Medicine, University of Pavia, 27100 Pavia, Italy
| | - Elisabetta Di Profio
- Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy; (V.C.); (E.D.P.); (G.F.); (V.C.M.); (C.F.T.); (G.V.Z.)
- Department of Animal Sciences for Health, Animal Production and Food Safety, University of Milan, 20133 Milan, Italy
| | - Giulia Fiore
- Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy; (V.C.); (E.D.P.); (G.F.); (V.C.M.); (C.F.T.); (G.V.Z.)
| | - Federica Rey
- Department of Biomedical and Clinical Sciences “L. Sacco”, University of Milan, 20157 Milan, Italy;
- Pediatric Clinical Research Center Fondazione Romeo ed Enrica Invernizzi, University of Milan, 20157 Milan, Italy
| | - Vittoria Carlotta Magenes
- Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy; (V.C.); (E.D.P.); (G.F.); (V.C.M.); (C.F.T.); (G.V.Z.)
| | - Carolina Federica Todisco
- Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy; (V.C.); (E.D.P.); (G.F.); (V.C.M.); (C.F.T.); (G.V.Z.)
| | - Stephana Carelli
- Department of Biomedical and Clinical Sciences “L. Sacco”, University of Milan, 20157 Milan, Italy;
- Pediatric Clinical Research Center Fondazione Romeo ed Enrica Invernizzi, University of Milan, 20157 Milan, Italy
- Correspondence: (E.V.); (S.C.)
| | - Gian Vincenzo Zuccotti
- Department of Pediatrics, Vittore Buzzi Children’s Hospital, University of Milan, 20154 Milan, Italy; (V.C.); (E.D.P.); (G.F.); (V.C.M.); (C.F.T.); (G.V.Z.)
- Department of Biomedical and Clinical Sciences “L. Sacco”, University of Milan, 20157 Milan, Italy;
- Pediatric Clinical Research Center Fondazione Romeo ed Enrica Invernizzi, University of Milan, 20157 Milan, Italy
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188
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Shinde AB, Song A, Wang QA. Brown Adipose Tissue Heterogeneity, Energy Metabolism, and Beyond. Front Endocrinol (Lausanne) 2021; 12:651763. [PMID: 33953697 PMCID: PMC8092391 DOI: 10.3389/fendo.2021.651763] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 03/18/2021] [Indexed: 01/19/2023] Open
Abstract
Brown adipocyte in brown adipose tissue (BAT) specializes in expending energy through non-shivering thermogenesis, a process that produces heat either by uncoupling protein 1 (UCP1) dependent uncoupling of mitochondrial respiration or by UCP1 independent mechanisms. Apart from this, there is ample evidence suggesting that BAT has an endocrine function. Studies in rodents point toward its vital roles in glucose and lipid homeostasis, making it an important therapeutic target for treating metabolic disorders related to morbidities such as obesity and type 2 diabetes. The rediscovery of thermogenically active BAT depots in humans by several independent research groups in the last decade has revitalized interest in BAT as an even more promising therapeutic intervention. Over the last few years, there has been overwhelming interest in understanding brown adipocyte's developmental lineages and how brown adipocyte uniquely utilizes energy beyond UCP1 mediated uncoupling respiration. These new discoveries would be leveraged for designing novel therapeutic interventions for metabolic disorders.
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Affiliation(s)
- Abhijit Babaji Shinde
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, United States
| | - Anying Song
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, United States
| | - Qiong A. Wang
- Department of Molecular & Cellular Endocrinology, Arthur Riggs Diabetes and Metabolism Research Institute, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, United States
- Comprehensive Cancer Center, Beckman Research Institute, City of Hope Medical Center, Duarte, CA, United States
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189
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Pace NP, Vassallo J, Calleja-Agius J. Gestational diabetes, environmental temperature and climate factors - From epidemiological evidence to physiological mechanisms. Early Hum Dev 2021; 155:105219. [PMID: 33046275 DOI: 10.1016/j.earlhumdev.2020.105219] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gestational diabetes (GDM) is a common metabolic complication of pregnancy that is generally asymptomatic in its clinical course, although it is potentially associated with a wide range of both maternal and foetal complications. The population prevalence of GDM varies widely, depending on the clinical diagnostic criteria, ethnicity, demographics and background prevalence of type 2 diabetes. Climate variability and environmental temperature have recently come to the forefront as potential direct or indirect determinants of human health. The association between GDM and environmental temperature is complex, and studies have often reported conflicting findings. Epidemiologic studies have shown a direct relation between rising environmental temperature and the risk of both GDM and impaired beta cell function. Seasonal trends in the prevalence of GDM have been reported in several populations, with a higher prevalence in summer months. Multiple mechanisms have been proposed to explain the GDM-temperature correlation. A growing body of evidence supports a link between temperature, energy expenditure and adipose tissue metabolism. Brown adipose tissue thermogenesis, induced by cold temperatures, improves insulin sensitivity. Further biological explanations for the GDM-temperature correlation lie in potential association with low vitamin D levels, which varies according to sunshine exposure. Observational studies are also complicated by lifestyle factors, such as diet and physical activity, that could exhibit seasonal variation. In this review article, we provide a systematic overview of available epidemiological evidence linking environmental temperature and gestational diabetes. Furthermore, the physiological mechanisms that give biological plausibility to association between GDM and temperature are explored. As future climate patterns could drive global changes in GDM prevalence, this knowledge has important implications for both clinicians and researchers.
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Affiliation(s)
- Nikolai Paul Pace
- Department of Anatomy, Faculty of Medicine and Surgery, Biomedical Sciences Building, University of Malta, Msida MSD 2080, Malta.
| | - Josanne Vassallo
- Department of Medicine, Faculty of Medicine and Surgery, Biomedical Sciences Building, University of Malta, Msida MSD 2080, Malta
| | - Jean Calleja-Agius
- Department of Anatomy, Faculty of Medicine and Surgery, Biomedical Sciences Building, University of Malta, Msida MSD 2080, Malta
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190
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Ivanova YM, Blondin DP. Examining the benefits of cold exposure as a therapeutic strategy for obesity and type 2 diabetes. J Appl Physiol (1985) 2021; 130:1448-1459. [PMID: 33764169 DOI: 10.1152/japplphysiol.00934.2020] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The pathogenesis of metabolic diseases such as obesity and type 2 diabetes are characterized by a progressive dysregulation in energy partitioning, often leading to end-organ complications. One emerging approach proposed to target this metabolic dysregulation is the application of mild cold exposure. In healthy individuals, cold exposure can increase energy expenditure and whole body glucose and fatty acid utilization. Repeated exposures can lower fasting glucose and insulin levels and improve dietary fatty acid handling, even in healthy individuals. Despite its apparent therapeutic potential, little is known regarding the effects of cold exposure in populations for which this stimulation could benefit the most. The few studies available have shown that both acute and repeated exposures to the cold can improve insulin sensitivity and reduce fasting glycemia in individuals with type 2 diabetes. However, critical gaps remain in understanding the prolonged effects of repeated cold exposures on glucose regulation and whole body insulin sensitivity in individuals with metabolic syndrome. Much of the metabolic benefits appear to be attributable to the recruitment of shivering skeletal muscles. However, further work is required to determine whether the broader recruitment of skeletal muscles observed during cold exposure can confer metabolic benefits that surpass what has been historically observed from endurance exercise. In addition, although cold exposure offers unique cardiovascular responses for a physiological stimulus that increases energy expenditure, further work is required to determine how acute and repeated cold exposure can impact cardiovascular responses and myocardial function across a broader scope of individuals.
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Affiliation(s)
- Yoanna M Ivanova
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Québec, Canada.,Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Denis P Blondin
- Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Québec, Canada.,Division of Neurology, Department of Medicine, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec, Canada
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191
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Stöhr O, Tao R, Miao J, Copps KD, White MF. FoxO1 suppresses Fgf21 during hepatic insulin resistance to impair peripheral glucose utilization and acute cold tolerance. Cell Rep 2021; 34:108893. [PMID: 33761350 PMCID: PMC8529953 DOI: 10.1016/j.celrep.2021.108893] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/22/2020] [Accepted: 03/02/2021] [Indexed: 12/28/2022] Open
Abstract
Fgf21 (fibroblast growth factor 21) is a regulatory hepatokine that, in pharmacologic form, powerfully promotes weight loss and glucose homeostasis. Although "Fgf21 resistance" is inferred from higher plasma Fgf21 levels in insulin-resistant mice and humans, diminished Fgf21 function is understood primarily via Fgf21 knockout mice. By contrast, we show that modestly reduced Fgf21-owing to cell-autonomous suppression by hepatic FoxO1-contributes to dysregulated metabolism in LDKO mice (Irs1L/L⋅Irs2L/L⋅CreAlb), a model of severe hepatic insulin resistance caused by deletion of hepatic Irs1 (insulin receptor substrate 1) and Irs2. Knockout of hepatic Foxo1 in LDKO mice or direct restoration of Fgf21 by adenoviral infection restored glucose utilization by BAT (brown adipose tissue) and skeletal muscle, normalized thermogenic gene expression in LDKO BAT, and corrected acute cold intolerance of LDKO mice. These studies highlight the Fgf21-dependent plasticity and importance of BAT function to metabolic health during hepatic insulin resistance.
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Affiliation(s)
- Oliver Stöhr
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02215, USA
| | - Rongya Tao
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02215, USA
| | - Ji Miao
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02215, USA
| | - Kyle D Copps
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02215, USA
| | - Morris F White
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02215, USA.
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192
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Adipose stem cells in obesity: challenges and opportunities. Biosci Rep 2021; 40:225001. [PMID: 32452515 PMCID: PMC7284323 DOI: 10.1042/bsr20194076] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 05/08/2020] [Accepted: 05/22/2020] [Indexed: 02/07/2023] Open
Abstract
Adipose tissue, the storage of excessive energy in the body, secretes various proteins called adipokines, which connect the body’s nutritional status to the regulation of energy balance. Obesity triggers alterations of quantity and quality of various types of cells that reside in adipose tissue, including adipose stem cells (ASCs; referred to as adipose-derived stem/stromal cells in vitro). These alterations in the functionalities and properties of ASCs impair adipose tissue remodeling and adipose tissue function, which induces low-grade systemic inflammation, progressive insulin resistance, and other metabolic disorders. In contrast, the ability of ASCs to recruit new adipocytes when faced with caloric excess leads to healthy adipose tissue expansion, associated with lower amounts of inflammation, fibrosis, and insulin resistance. This review focuses on recent advances in our understanding of the identity of ASCs and their roles in adipose tissue development, homeostasis, expansion, and thermogenesis, and how these roles go awry in obesity. A better understanding of the biology of ASCs and their adipogenesis may lead to novel therapeutic targets for obesity and metabolic disease.
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193
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Finlin BS, Memetimin H, Zhu B, Confides AL, Vekaria HJ, El Khouli RH, Johnson ZR, Westgate PM, Chen J, Morris AJ, Sullivan PG, Dupont-Versteegden EE, Kern PA. Pioglitazone does not synergize with mirabegron to increase beige fat or further improve glucose metabolism. JCI Insight 2021; 6:143650. [PMID: 33571166 PMCID: PMC8026187 DOI: 10.1172/jci.insight.143650] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Accepted: 02/10/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Beige and brown adipose tissue (BAT) are associated with improved metabolic homeostasis. We recently reported that the β3-adrenergic receptor agonist mirabegron induced beige adipose tissue in obese insulin-resistant subjects, and this was accompanied by improved glucose metabolism. Here we evaluated pioglitazone treatment with a combination pioglitazone and mirabegron treatment and compared these with previously published data evaluating mirabegron treatment alone. Both drugs were used at FDA-approved dosages. METHODS We measured BAT by PET CT scans, measured beige adipose tissue by immunohistochemistry, and comprehensively characterized glucose and lipid homeostasis and insulin sensitivity by euglycemic clamp and oral glucose tolerance tests. Subcutaneous white adipose tissue, muscle fiber type composition and capillary density, lipotoxicity, and systemic inflammation were evaluated by immunohistochemistry, gene expression profiling, mass spectroscopy, and ELISAs. RESULTS Treatment with pioglitazone or the combination of pioglitazone and mirabegron increased beige adipose tissue protein marker expression and improved insulin sensitivity and glucose homeostasis, but neither treatment induced BAT in these obese subjects. When the magnitude of the responses to the treatments was evaluated, mirabegron was found to be the most effective at inducing beige adipose tissue. Although monotherapy with either mirabegron or pioglitazone induced adipose beiging, combination treatment resulted in less beiging than either alone. The 3 treatments also had different effects on muscle fiber type switching and capillary density. CONCLUSION The addition of pioglitazone to mirabegron treatment does not enhance beiging or increase BAT in obese insulin-resistant research participants. TRIAL REGISTRATION ClinicalTrials.gov NCT02919176. FUNDING NIH DK112282 and P20GM103527 and Clinical and Translational Science Awards grant UL1TR001998.
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Affiliation(s)
- Brian S Finlin
- Division of Endocrinology, Department of Internal Medicine, College of Medicine.,Barnstable Brown Diabetes and Obesity Center
| | - Hasiyet Memetimin
- Division of Endocrinology, Department of Internal Medicine, College of Medicine.,Barnstable Brown Diabetes and Obesity Center
| | - Beibei Zhu
- Division of Endocrinology, Department of Internal Medicine, College of Medicine.,Barnstable Brown Diabetes and Obesity Center
| | - Amy L Confides
- Department of Physical Therapy and Center for Muscle Biology, College of Health Sciences
| | | | | | - Zachary R Johnson
- Division of Endocrinology, Department of Internal Medicine, College of Medicine
| | | | - Jianzhong Chen
- Division of Cardiovascular Medicine, Department of Internal Medicine, College of Medicine, University of Kentucky, Lexington, Kentucky, USA.,Lexington Veterans Affairs Medical Center, Lexington, Kentucky, USA
| | - Andrew J Morris
- Division of Cardiovascular Medicine, Department of Internal Medicine, College of Medicine, University of Kentucky, Lexington, Kentucky, USA.,Lexington Veterans Affairs Medical Center, Lexington, Kentucky, USA
| | | | | | - Philip A Kern
- Division of Endocrinology, Department of Internal Medicine, College of Medicine.,Barnstable Brown Diabetes and Obesity Center
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194
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Park J, Shin S, Liu L, Jahan I, Ong SG, Xu P, Berry DC, Jiang Y. Progenitor-like characteristics in a subgroup of UCP1+ cells within white adipose tissue. Dev Cell 2021; 56:985-999.e4. [PMID: 33711247 DOI: 10.1016/j.devcel.2021.02.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 12/17/2020] [Accepted: 02/16/2021] [Indexed: 12/19/2022]
Abstract
Thermogenic beige fat found in white adipose tissue is a potential therapeutic target to curb the global obesity and diabetes epidemic. However, these inducible thermogenic beige adipocytes have been thought to be short-lived and to rapidly convert to "white-like" adipocytes after discontinuing stimuli. In this study, using effective labeling techniques and genetic mouse tools, we demonstrate that a subset of UCP1+ cells that exist within white adipose tissue are able to self-divide and contribute to new beige adipocyte recruitment in response to β3 stimuli. When these cells are depleted or their adipogenic capability is blocked, β3-induced beige adipocyte formation is impaired. We also identify a cell-cycle machinery of p21 and CDKN2A as a molecular basis of beige adipocyte regulation. Collectively, our findings provide new insights into the cellular and molecular mechanisms of beige adipocyte regulation and potential therapeutic opportunities to induce the beige phenotype and treat metabolic disease.
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Affiliation(s)
- Jooman Park
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Sunhye Shin
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Lifeng Liu
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Iffat Jahan
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Sang-Ging Ong
- Department of Pharmacology and Regenerative Medicine, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA; Division of Cardiology, Department of Medicine, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Pingwen Xu
- Division of Endocrinology, Department of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Daniel C Berry
- Division of Nutritional Sciences, Cornell University, Ithaca, NY 14853, USA
| | - Yuwei Jiang
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA.
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195
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Remie CME, Moonen MPB, Roumans KHM, Nascimento EBM, Gemmink A, Havekes B, Schaart G, Kornips E, Joris PJ, Schrauwen-Hinderling VB, Hoeks J, Kersten S, Hesselink MKC, Phielix E, Lichtenbelt WDVM, Schrauwen P. Metabolic responses to mild cold acclimation in type 2 diabetes patients. Nat Commun 2021; 12:1516. [PMID: 33750795 PMCID: PMC7943816 DOI: 10.1038/s41467-021-21813-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 01/29/2021] [Indexed: 12/20/2022] Open
Abstract
Mild cold acclimation for 10 days has been previously shown to markedly improve insulin sensitivity in patients with type 2 diabetes. Here we show in a single-arm intervention study (Trialregister.nl ID: NL4469/NTR5711) in nine patients with type 2 diabetes that ten days of mild cold acclimation (16–17 °C) in which observable, overt shivering was prevented, does not result in improved insulin sensitivity, postprandial glucose and lipid metabolism or intrahepatic lipid content and only results in mild effects on overnight fasted fat oxidation, postprandial energy expenditure and aortic augmentation index. The lack of marked metabolic effects in this study is associated with a lack of self-reported shivering and a lack of upregulation of gene expression of muscle activation or muscle contraction pathways in skeletal muscle and suggests that some form of muscle contraction is needed for beneficial effects of mild cold acclimation. Cold acclimation has been shown to have beneficial metabolic effects, including improved insulin sensitivity in patients with type 2 diabetes. Here the authors show that a mild cold acclimation regiment during which overt shivering was prevented did not result in improved insulin sensitivity in a small group of patients with type 2 diabetes.
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Affiliation(s)
- Carlijn M E Remie
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Michiel P B Moonen
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Kay H M Roumans
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Emmani B M Nascimento
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Anne Gemmink
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Bas Havekes
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands.,Department of Internal Medicine, Division of Endocrinology and Metabolic Disease, Maastricht University Medical Center, Maastricht, AZ, The Netherlands
| | - Gert Schaart
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Esther Kornips
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Peter J Joris
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Vera B Schrauwen-Hinderling
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands.,Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, AZ, The Netherlands
| | - Joris Hoeks
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Sander Kersten
- Nutrition, Metabolism and Genomics Group, Division of Human Nutrition and Health, Wageningen University, Wageningen, WE, The Netherlands
| | - Matthijs K C Hesselink
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Esther Phielix
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Wouter D van Marken Lichtenbelt
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands
| | - Patrick Schrauwen
- Department of Nutrition and Movement Sciences, NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, Maastricht, MD, The Netherlands.
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196
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Gaspar RC, Pauli JR, Shulman GI, Muñoz VR. An update on brown adipose tissue biology: a discussion of recent findings. Am J Physiol Endocrinol Metab 2021; 320:E488-E495. [PMID: 33459179 PMCID: PMC7988785 DOI: 10.1152/ajpendo.00310.2020] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 01/05/2021] [Accepted: 01/07/2021] [Indexed: 12/20/2022]
Abstract
Brown adipose tissue (BAT) has been encouraged as a potential treatment for obesity and comorbidities due to its thermogenic activity capacity and contribution to energy expenditure. Some interventions such as cold and β-adrenergic drugs are able to activate BAT thermogenesis as well as promote differentiation of white adipocytes into brown-like cells (browning), enhancing the thermogenic activity of these cells. In this mini-review, we discuss new mechanisms related to BAT and energy expenditure. In this regard, we will also discuss recent studies that have revealed the existence of important secretory molecules from BAT "batokines" that act in autocrine, paracrine, and endocrine mechanisms, which in turn may explain some of the beneficial roles of BAT on whole body glucose and fat metabolism. Finally, we will discuss new insights related to BAT thermogenesis with an additional focus on the distinct features of BAT metabolism between rodents and humans.
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Affiliation(s)
- Rafael C Gaspar
- Department of Health Sciences, Laboratory of Molecular Biology of Exercise, School of Applied Sciences, University of Campinas, São Paulo, Brazil
- Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut
| | - José R Pauli
- Department of Health Sciences, Laboratory of Molecular Biology of Exercise, School of Applied Sciences, University of Campinas, São Paulo, Brazil
- OCRC-Obesity and Comorbidities Research Center, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Gerald I Shulman
- Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut
- Department of Cellular & Molecular Physiology, Yale School of Medicine, New Haven, Connecticut
| | - Vitor R Muñoz
- Department of Health Sciences, Laboratory of Molecular Biology of Exercise, School of Applied Sciences, University of Campinas, São Paulo, Brazil
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197
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Lee MK, Lee B, Kim CY. Natural Extracts That Stimulate Adipocyte Browning and Their Underlying Mechanisms. Antioxidants (Basel) 2021; 10:antiox10020308. [PMID: 33671335 PMCID: PMC7922619 DOI: 10.3390/antiox10020308] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/05/2021] [Accepted: 02/12/2021] [Indexed: 12/20/2022] Open
Abstract
Despite progress in understanding the developmental lineage and transcriptional factors regulating brown and beige adipocytes, the role of environmental modifiers, such as food components and natural extracts, remains to be elucidated. Furthermore, the undesirable pleiotropic effects produced by synthetic drugs targeting adipose tissue browning and thermogenesis necessitate research into alternative natural sources to combat obesity and related metabolic disorders. The current review, therefore, focused on the effects of various extracts from foods, plants, and marine products on adipose tissue browning and obesity. In particular, the recent findings of food components and marine products on adipose tissue browning will be discussed here.
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Affiliation(s)
- Min-Kyeong Lee
- Department of Food Science and Nutrition, Pukyong National University, Nam-gu, Daeyeon Dong, Busan 608737, Korea;
| | - Bonggi Lee
- Department of Food Science and Nutrition, Pukyong National University, Nam-gu, Daeyeon Dong, Busan 608737, Korea;
- Correspondence: (B.L.); (C.Y.K.); Tel.: +82-51-629-5852 (B.L.); +82-53-810-2871 (C.Y.K.)
| | - Choon Young Kim
- Department of Food and Nutrition, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
- Correspondence: (B.L.); (C.Y.K.); Tel.: +82-51-629-5852 (B.L.); +82-53-810-2871 (C.Y.K.)
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198
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Obesity-induced TRB3 negatively regulates Brown adipose tissue function in mice. Biochem Biophys Res Commun 2021; 547:29-35. [PMID: 33592376 DOI: 10.1016/j.bbrc.2021.01.103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 01/28/2021] [Indexed: 12/26/2022]
Abstract
Brown adipose tissue (BAT) and stimulating adaptive thermogenesis have been implicated as anti-obese and anti-diabetic tissues due to their ability to dissipate energy as heat by the expression of UCP1. We have recently demonstrated that TRB3 impairs differentiation of brown preadipocytes via inhibiting insulin signaling. However, the roles of the protein in BAT function and thermogenesis in vivo have not yet been established. For this study we tested the hypothesis that TRB3 mediates obesity- and diabetes-induced impairments in BAT differentiation and function, and that inhibition of TRB3 improves BAT function. TRB3 expression was increased in BAT from high-fat fed mice and ob/ob mice, which was associated with decreased UCP1 expression. Incubation of brown adipocytes with palmitate increased TRB3 expression and decreased UCP1. Knockout of TRB3 in mice displayed higher UCP1 expression in BAT and cold resistance. Incubation of brown adipocytes with ER stressors increased TRB3 but decreased UCP1 and ER stress markers were elevated in BAT from high-fat fed mice and ob/ob mice. Finally, high-fat feeding in TRB3KO mice were protected from obesity-induced glucose intolerance and displayed cold resistance and higher expression of BAT-specific markers. These data demonstrate that high-fat feeding and obesity increase TRB3 in BAT, resulting in impaired tissue function.
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199
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Beppu LY, Mooli RGR, Qu X, Marrero GJ, Finley CA, Fooks AN, Mullen ZP, Frias AB, Sipula I, Xie B, Helfrich KE, Watkins SC, Poholek AC, Ramakrishnan SK, Jurczak MJ, D’Cruz LM. Tregs facilitate obesity and insulin resistance via a Blimp-1/IL-10 axis. JCI Insight 2021; 6:140644. [PMID: 33351782 PMCID: PMC7934851 DOI: 10.1172/jci.insight.140644] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 12/10/2020] [Indexed: 12/12/2022] Open
Abstract
Interleukin-10 (IL-10) is a critical cytokine used by immune cells to suppress inflammation. Paradoxically, immune cell-derived IL-10 can drive insulin resistance in obesity by suppressing adipocyte energy expenditure and thermogenesis. However, the source of IL-10 necessary for the suppression of adipocyte thermogenesis is unknown. We show here that CD4+Foxp3+ regulatory T cells (Tregs) are a substantial source of IL-10 and that Treg-derived IL-10 can suppress adipocyte beiging. Unexpectedly, Treg-specific loss of IL-10 resulted in increased insulin sensitivity and reduced obesity in high-fat diet-fed male mice. Mechanistically, we determined that Treg-specific loss of the transcription factor Blimp-1, a driver of IL-10 expression by Tregs, phenocopied the Treg-specific IL-10-deficient mice. Loss of Blimp-1 expression in Tregs resulted in reduced ST2+KLRG1+, IL-10-secreting Tregs, particularly in the white adipose tissue. Blimp-1-deficient mice were protected from glucose intolerance, insulin resistance, and diet-induced obesity, through increased white adipose tissue browning. Taken together, our data show that Blimp-1-regulated IL-10 secretion by Tregs represses white adipose tissue beiging to maintain adipose tissue homeostasis.
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Affiliation(s)
| | - Raja Gopal Reddy Mooli
- Divison of Endocrinology, Department of Medicine, and the Center for Metabolism and Mitochondrial Medicine
| | | | | | | | | | | | | | - Ian Sipula
- Divison of Endocrinology, Department of Medicine, and the Center for Metabolism and Mitochondrial Medicine
| | - Bingxian Xie
- Divison of Endocrinology, Department of Medicine, and the Center for Metabolism and Mitochondrial Medicine
| | | | | | - Amanda C. Poholek
- Department of Pediatrics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Sadeesh K. Ramakrishnan
- Divison of Endocrinology, Department of Medicine, and the Center for Metabolism and Mitochondrial Medicine
| | - Michael J. Jurczak
- Divison of Endocrinology, Department of Medicine, and the Center for Metabolism and Mitochondrial Medicine
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200
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Brown Adipose Tissue and Its Role in Insulin and Glucose Homeostasis. Int J Mol Sci 2021; 22:ijms22041530. [PMID: 33546400 PMCID: PMC7913527 DOI: 10.3390/ijms22041530] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/21/2021] [Accepted: 02/01/2021] [Indexed: 12/15/2022] Open
Abstract
The increased worldwide prevalence of obesity, insulin resistance, and their related metabolic complications have prompted the scientific world to search for new possibilities to combat obesity. Brown adipose tissue (BAT), due to its unique protein uncoupling protein 1 (UPC1) in the inner membrane of the mitochondria, has been acknowledged as a promising approach to increase energy expenditure. Activated brown adipocytes dissipate energy, resulting in heat production. In other words, BAT burns fat and increases the metabolic rate, promoting a negative energy balance. Moreover, BAT alleviates metabolic complications like dyslipidemia, impaired insulin secretion, and insulin resistance in type 2 diabetes. The aim of this review is to explore the role of BAT in total energy expenditure, as well as lipid and glucose homeostasis, and to discuss new possible activators of brown adipose tissue in humans to treat obesity and metabolic disorders.
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