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Zhang H, Li Y, Ibáñez CF, Xie M. Perirenal adipose tissue contains a subpopulation of cold-inducible adipocytes derived from brown-to-white conversion. eLife 2024; 13:RP93151. [PMID: 38470102 DOI: 10.7554/elife.93151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024] Open
Abstract
Perirenal adipose tissue (PRAT) is a unique visceral depot that contains a mixture of brown and white adipocytes. The origin and plasticity of such cellular heterogeneity remains unknown. Here, we combine single-nucleus RNA sequencing with genetic lineage tracing to reveal the existence of a distinct subpopulation of Ucp1-&Cidea+ adipocytes that arises from brown-to-white conversion during postnatal life in the periureter region of mouse PRAT. Cold exposure restores Ucp1 expression and a thermogenic phenotype in this subpopulation. These cells have a transcriptome that is distinct from subcutaneous beige adipocytes and may represent a unique type of cold-recruitable adipocytes. These results pave the way for studies of PRAT physiology and mechanisms controlling the plasticity of brown/white adipocyte phenotypes.
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Affiliation(s)
- Houyu Zhang
- Chinese Institute for Brain Research, Zhongguancun Life Science Park, Beijing, China
- Peking University Academy for Advanced Interdisciplinary Studies, Beijing, China
| | - Yan Li
- Chinese Institute for Brain Research, Zhongguancun Life Science Park, Beijing, China
- Peking University Academy for Advanced Interdisciplinary Studies, Beijing, China
| | - Carlos F Ibáñez
- Chinese Institute for Brain Research, Zhongguancun Life Science Park, Beijing, China
- Peking University School of Life Sciences, Peking-Tsinghua Center for Life Sciences, Beijing, China
- PKU-IDG/McGovern Institute for Brain Research, Beijing, China
- Department of Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Meng Xie
- PKU-IDG/McGovern Institute for Brain Research, Beijing, China
- Peking University School of Psychological and Cognitive Sciences, Beijing Key Laboratory of Behavior and Mental Health, Beijing, China
- Department of Biosciences and Nutrition, Karolinska Institute, Flemingsberg, Sweden
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2
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Mancini C, Gohlke S, Garcia-Carrizo F, Zagoriy V, Stephanowitz H, Schulz TJ. Identification of biomarkers of brown adipose tissue aging highlights the role of dysfunctional energy and nucleotide metabolism pathways. Sci Rep 2021; 11:19928. [PMID: 34620947 PMCID: PMC8497523 DOI: 10.1038/s41598-021-99362-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 09/23/2021] [Indexed: 12/25/2022] Open
Abstract
Brown adipose tissue function declines during aging and may contribute to the onset of metabolic disorders such as diabetes and obesity. Only limited understanding of the mechanisms leading to the metabolic impairment of brown adipocytes during aging exists. To this end, interscapular brown adipose tissue samples were collected from young and aged mice for quantification of differential gene expression and metabolite levels. To identify potential processes involved in brown adipocyte dysfunction, metabolite concentrations were correlated to aging and significantly changed candidates were subsequently integrated with a non-targeted proteomic dataset and gene expression analyses. Our results include novel age-dependent correlations of polar intermediates in brown adipose tissue. Identified metabolites clustered around three biochemical processes, specifically energy metabolism, nucleotide metabolism and vitamin metabolism. One mechanism of brown adipose tissue dysfunction may be linked to mast cell activity, and we identify increased histamine levels in aged brown fat as a potential biomarker. In addition, alterations of genes involved in synthesis and degradation of many metabolites were mainly observed in the mature brown adipocyte fraction as opposed to the stromal vascular fraction. These findings may provide novel insights on the molecular mechanisms contributing to the impaired thermogenesis of brown adipocytes during aging.
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Affiliation(s)
- Carola Mancini
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, 114-116 Arthur-Scheunert-Allee, 14558, Nuthetal, Germany.,German Center for Diabetes Research (DZD), München-Neuherberg, Germany
| | - Sabrina Gohlke
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, 114-116 Arthur-Scheunert-Allee, 14558, Nuthetal, Germany
| | - Francisco Garcia-Carrizo
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, 114-116 Arthur-Scheunert-Allee, 14558, Nuthetal, Germany
| | | | - Heike Stephanowitz
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Berlin, Germany
| | - Tim J Schulz
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, 114-116 Arthur-Scheunert-Allee, 14558, Nuthetal, Germany. .,German Center for Diabetes Research (DZD), München-Neuherberg, Germany. .,Institute of Nutritional Science, University of Potsdam, Potsdam-Rehbrücke, Nuthetal, Germany.
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3
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Age and Sex: Impact on adipose tissue metabolism and inflammation. Mech Ageing Dev 2021; 199:111563. [PMID: 34474078 DOI: 10.1016/j.mad.2021.111563] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 08/19/2021] [Accepted: 08/26/2021] [Indexed: 02/08/2023]
Abstract
Age associated chronic inflammation is a major contributor to diseases with advancing age. Adipose tissue function is at the nexus of processes contributing to age-related metabolic disease and mediating longevity. Hormonal fluctuations in aging potentially regulate age-associated visceral adiposity and metabolic dysfunction. Visceral adiposity in aging is linked to aberrant adipogenesis, insulin resistance, lipotoxicity and altered adipokine secretion. Age-related inflammatory phenomena depict sex differences in macrophage polarization, changes in T and B cell numbers, and types of dendritic cells. Sex differences are also observed in adipose tissue remodeling and cellular senescence suggesting a role for sex steroid hormones in the regulation of the adipose tissue microenvironment. It is crucial to investigate sex differences in aging clinical outcomes to identify and better understand physiology in at-risk individuals. Early interventions aimed at targets involved in adipose tissue adipogenesis, remodeling and inflammation in aging could facilitate a profound impact on health span and overcome age-related functional decline.
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4
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Frasca D, Blomberg BB. Adipose tissue, immune aging, and cellular senescence. Semin Immunopathol 2020; 42:573-587. [PMID: 32785750 DOI: 10.1007/s00281-020-00812-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/28/2020] [Indexed: 12/14/2022]
Abstract
Obesity represents a serious health problem as it is rapidly increasing worldwide. Obesity is associated with reduced healthspan and lifespan, decreased responses to infections and vaccination, and increased frequency of inflammatory conditions typical of old age. Obesity is characterized by increased fat mass and remodeling of the adipose tissue (AT). In this review, we summarize published data on the different types of AT present in mice and humans, and their roles as fat storage as well as endocrine and immune tissues. We review the age-induced changes, including those in the distribution of fat in the body, in abundance and function of adipocytes and their precursors, and in the infiltration of immune cells from the peripheral blood. We also show that cells with a senescent-associated secretory phenotype accumulate in the AT of mice and humans with age, where they secrete several factors involved in the establishment and maintenance of local inflammation, oxidative stress, cell death, tissue remodeling, and infiltration of pro-inflammatory immune cells. Not only adipocytes and pre-adipocytes but also immune cells show a senescent phenotype in the AT. With the increase in human lifespan, it is crucial to identify strategies of intervention and target senescent cells in the AT to reduce local and systemic inflammation and the development of age-associated diseases. Several studies have indeed shown that senescent cells can be effectively targeted in the AT by selectively removing them or by inhibiting the pathways that lead to the secretion of pro-inflammatory factors.
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Affiliation(s)
- Daniela Frasca
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA. .,Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - Bonnie B Blomberg
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA.,Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
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5
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Bandyopadhayaya S, Ford B, Mandal CC. Cold-hearted: A case for cold stress in cancer risk. J Therm Biol 2020; 91:102608. [PMID: 32716858 DOI: 10.1016/j.jtherbio.2020.102608] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/25/2020] [Accepted: 04/25/2020] [Indexed: 02/07/2023]
Abstract
A negative correlation exists between environmental temperature and cancer risk based on both epidemiological and statistical analyses. Previously, cold stress was reported to be an effective cause of tumorigenesis. Several studies have demonstrated that cold temperature serves as a potential risk factor in cancer development. Most recently, a link was demonstrated between the effects of extreme cold climate on cancer incidence, pinpointing its impact on tumour suppressor genes by causing mutation. The underlying mechanism behind cold stress and its association with tumorigenesis is not well understood. Hence, this review intends to shed light on the role of associated factors, genetic and/or non-genetic, which are modulated by cold temperature, and eventually influence tumorigenic potential. While scrutinizing the effect of cold exposure on the body, the expression of certain genes, e.g. uncoupled proteins and heat-shock proteins, were elevated. Biological chemicals such as norepinephrine, thyroxine, and cholesterol were also elevated. Brown adipose tissue, which plays an essential role in thermogenesis, displayed enhanced activity upon cold exposure. Adaptive measures are utilized by the body to tolerate the cold, and in doing so, invites both epigenetic and genetic changes. Unknowingly, these adaptive strategies give rise to a lethal outcome i.e., genesis of cancer. Concisely, this review attempts to draw a link between cold stress, genetic and epigenetic changes, and tumorigenesis and aspires to ascertain the mechanism behind cold temperature-mediated cancer risk.
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Affiliation(s)
| | - Bridget Ford
- Department of Biology, University of the Incarnate Word, San Antonio, TX, 78209, USA
| | - Chandi C Mandal
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, 305817, India.
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6
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Tajima K, Ikeda K, Chang HY, Chang CH, Yoneshiro T, Oguri Y, Jun H, Wu J, Ishihama Y, Kajimura S. Mitochondrial lipoylation integrates age-associated decline in brown fat thermogenesis. Nat Metab 2019; 1:886-898. [PMID: 32313871 PMCID: PMC7169975 DOI: 10.1038/s42255-019-0106-z] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Thermogenesis in brown adipose tissue (BAT) declines with age; however, what regulates this process remains poorly understood. Here, we identify mitochondria lipoylation as a previously unappreciated molecular hallmark of aged BAT in mice. Using mitochondrial proteomics, we show that mitochondrial lipoylation is disproportionally reduced in aged BAT through a post-transcriptional decrease in the iron-sulfur (Fe-S) cluster formation pathway. A defect in the Fe-S cluster formation by the fat-specific deletion of Bola3 significantly reduces mitochondrial lipoylation and fuel oxidation in BAT, leading to glucose intolerance and obesity. In turn, enhanced mitochondrial lipoylation by α-lipoic acid supplementation effectively restores BAT function in old mice, thereby preventing age-associated obesity and glucose intolerance. The effect of α-lipoic acids requires mitochondrial lipoylation via the Bola3 pathway and does not depend on the anti-oxidant activity of α-lipoic acid. These results open up the possibility to alleviate the age-associated decline in energy expenditure by enhancing the mitochondrial lipoylation pathway.
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Affiliation(s)
- Kazuki Tajima
- University of California, San Francisco Diabetes Center, San Francisco, CA, USA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA, USA
- Department of Cell and Tissue Biology, University of California, San Francisco, CA, USA
| | - Kenji Ikeda
- University of California, San Francisco Diabetes Center, San Francisco, CA, USA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA, USA
- Department of Cell and Tissue Biology, University of California, San Francisco, CA, USA
- Department of Molecular Endocrionology and Metabolism, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hsin-Yi Chang
- Department of Molecular and Cellular Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
- Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei, Taiwan
| | - Chih-Hsiang Chang
- Department of Molecular and Cellular Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Takeshi Yoneshiro
- University of California, San Francisco Diabetes Center, San Francisco, CA, USA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA, USA
- Department of Cell and Tissue Biology, University of California, San Francisco, CA, USA
| | - Yasuo Oguri
- University of California, San Francisco Diabetes Center, San Francisco, CA, USA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA, USA
- Department of Cell and Tissue Biology, University of California, San Francisco, CA, USA
| | - Heejin Jun
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jun Wu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Molecular & Integrative Physiology, Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Yasushi Ishihama
- Department of Molecular and Cellular Bioanalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan
| | - Shingo Kajimura
- University of California, San Francisco Diabetes Center, San Francisco, CA, USA.
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA, USA.
- Department of Cell and Tissue Biology, University of California, San Francisco, CA, USA.
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7
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Darcy J, Tseng YH. ComBATing aging-does increased brown adipose tissue activity confer longevity? GeroScience 2019; 41:285-296. [PMID: 31230192 DOI: 10.1007/s11357-019-00076-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 05/30/2019] [Indexed: 12/15/2022] Open
Abstract
Brown and its related beige adipose tissue (BAT) play a definitive role in maintaining body temperature by producing heat through uncoupling protein 1 (UCP1), which acts by dissociating oxidative phosphorylation from ATP production, resulting in the release of heat. Therefore, in order to maintain high thermogenic capacity, BAT must act as a metabolic sink by taking up vast amounts of circulating glucose and lipids for oxidation. This, along with the rediscovery of BAT in adult humans, has fueled the study of BAT as a putative therapeutic approach to manage the growing rates of obesity and metabolic syndromes. Notably, many of the beneficial consequences of BAT activity overlap with metabolic biomarkers of extended lifespan and healthspan. In this review, we provide background about BAT including the thermogenic program, BAT's role as a secretory organ, and differences between BAT in mice and humans. We also provide details on BAT during aging, and perspectives on the potential of targeting BAT to promote lifespan and healthspan.
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Affiliation(s)
- Justin Darcy
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, One Joslin Place, Boston, MA, 02215, USA
| | - Yu-Hua Tseng
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, One Joslin Place, Boston, MA, 02215, USA. .,Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA.
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8
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Gohlke S, Zagoriy V, Cuadros Inostroza A, Méret M, Mancini C, Japtok L, Schumacher F, Kuhlow D, Graja A, Stephanowitz H, Jähnert M, Krause E, Wernitz A, Petzke KJ, Schürmann A, Kleuser B, Schulz TJ. Identification of functional lipid metabolism biomarkers of brown adipose tissue aging. Mol Metab 2019; 24:1-17. [PMID: 31003944 PMCID: PMC6531832 DOI: 10.1016/j.molmet.2019.03.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/22/2019] [Accepted: 03/28/2019] [Indexed: 12/23/2022] Open
Abstract
OBJECTIVE Aging is accompanied by loss of brown adipocytes and a decline in their thermogenic potential, which may exacerbate the development of adiposity and other metabolic disorders. Presently, only limited evidence exists describing the molecular alterations leading to impaired brown adipogenesis with aging and the contribution of these processes to changes of systemic energy metabolism. METHODS Samples of young and aged murine brown and white adipose tissue were used to compare age-related changes of brown adipogenic gene expression and thermogenesis-related lipid mobilization. To identify potential markers of brown adipose tissue aging, non-targeted proteomic and metabolomic as well as targeted lipid analyses were conducted on young and aged tissue samples. Subsequently, the effects of several candidate lipid classes on brown adipocyte function were examined. RESULTS Corroborating previous reports of reduced expression of uncoupling protein-1, we observe impaired signaling required for lipid mobilization in aged brown fat after adrenergic stimulation. Omics analyses additionally confirm the age-related impairment of lipid homeostasis and reveal the accumulation of specific lipid classes, including certain sphingolipids, ceramides, and dolichols in aged brown fat. While ceramides as well as enzymes of dolichol metabolism inhibit brown adipogenesis, inhibition of sphingosine 1-phosphate receptor 2 induces brown adipocyte differentiation. CONCLUSIONS Our functional analyses show that changes in specific lipid species, as observed during aging, may contribute to reduced thermogenic potential. They thus uncover potential biomarkers of aging as well as molecular mechanisms that could contribute to the degradation of brown adipocytes, thereby providing potential treatment strategies of age-related metabolic conditions.
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Affiliation(s)
- Sabrina Gohlke
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | | | | | | | - Carola Mancini
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Lukasz Japtok
- Department of Toxicology, Institute of Nutritional Science, University of Potsdam, Potsdam-Rehbrücke, Nuthetal, Germany
| | - Fabian Schumacher
- Department of Toxicology, Institute of Nutritional Science, University of Potsdam, Potsdam-Rehbrücke, Nuthetal, Germany; Department of Molecular Biology, University of Duisburg-Essen, Essen, Germany
| | - Doreen Kuhlow
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Antonia Graja
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | | | - Markus Jähnert
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany; German Center for Diabetes Research (DZD), München, Neuherberg, Germany
| | - Eberhard Krause
- Leibniz Institute for Molecular Pharmacology, Berlin, Germany
| | - Andreas Wernitz
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Klaus-Jürgen Petzke
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - Annette Schürmann
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany; German Center for Diabetes Research (DZD), München, Neuherberg, Germany
| | - Burkhard Kleuser
- Department of Toxicology, Institute of Nutritional Science, University of Potsdam, Potsdam-Rehbrücke, Nuthetal, Germany; NutriAct - Competence Cluster Nutrition Research, Berlin, Potsdam, Germany
| | - Tim J Schulz
- Department of Adipocyte Development and Nutrition, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany; German Center for Diabetes Research (DZD), München, Neuherberg, Germany; Institute of Nutritional Science, University of Potsdam, Potsdam-Rehbrücke, Nuthetal, Germany.
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9
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Graja A, Garcia-Carrizo F, Jank AM, Gohlke S, Ambrosi TH, Jonas W, Ussar S, Kern M, Schürmann A, Aleksandrova K, Blüher M, Schulz TJ. Loss of periostin occurs in aging adipose tissue of mice and its genetic ablation impairs adipose tissue lipid metabolism. Aging Cell 2018; 17:e12810. [PMID: 30088333 PMCID: PMC6156450 DOI: 10.1111/acel.12810] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 06/01/2018] [Accepted: 06/10/2018] [Indexed: 12/22/2022] Open
Abstract
Remodeling of the extracellular matrix is a key component of the metabolic adaptations of adipose tissue in response to dietary and physiological challenges. Disruption of its integrity is a well-known aspect of adipose tissue dysfunction, for instance, during aging and obesity. Adipocyte regeneration from a tissue-resident pool of mesenchymal stem cells is part of normal tissue homeostasis. Among the pathophysiological consequences of adipogenic stem cell aging, characteristic changes in the secretory phenotype, which includes matrix-modifying proteins, have been described. Here, we show that the expression of the matricellular protein periostin, a component of the extracellular matrix produced and secreted by adipose tissue-resident interstitial cells, is markedly decreased in aged brown and white adipose tissue depots. Using a mouse model, we demonstrate that the adaptation of adipose tissue to adrenergic stimulation and high-fat diet feeding is impaired in animals with systemic ablation of the gene encoding for periostin. Our data suggest that loss of periostin attenuates lipid metabolism in adipose tissue, thus recapitulating one aspect of age-related metabolic dysfunction. In human white adipose tissue, periostin expression showed an unexpected positive correlation with age of study participants. This correlation, however, was no longer evident after adjusting for BMI or plasma lipid and liver function biomarkers. These findings taken together suggest that age-related alterations of the adipose tissue extracellular matrix may contribute to the development of metabolic disease by negatively affecting nutrient homeostasis.
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Affiliation(s)
- Antonia Graja
- Department of Adipocyte Development and Nutrition; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
- University of Potsdam, Institute of Nutritional Science; Potsdam-Rehbrücke Germany
| | - Francisco Garcia-Carrizo
- Department of Adipocyte Development and Nutrition; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
| | - Anne-Marie Jank
- Department of Adipocyte Development and Nutrition; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
| | - Sabrina Gohlke
- Department of Adipocyte Development and Nutrition; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
| | - Thomas H. Ambrosi
- Department of Adipocyte Development and Nutrition; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
| | - Wenke Jonas
- Department of Experimental Diabetology; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
- German Center for Diabetes Research (DZD); Munich-Neuherberg Germany
| | - Siegfried Ussar
- German Center for Diabetes Research (DZD); Munich-Neuherberg Germany
- JRG Adipocytes and Metabolism; Institute for Diabetes and Obesity; Helmholtz Center Munich; Garching Germany
| | - Matthias Kern
- Department of Medicine; University of Leipzig; Leipzig Germany
| | - Annette Schürmann
- University of Potsdam, Institute of Nutritional Science; Potsdam-Rehbrücke Germany
- Department of Experimental Diabetology; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
- German Center for Diabetes Research (DZD); Munich-Neuherberg Germany
| | - Krasimira Aleksandrova
- University of Potsdam, Institute of Nutritional Science; Potsdam-Rehbrücke Germany
- Nutrition, Immunity and Metabolism Senior Scientist Group; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
| | - Matthias Blüher
- Department of Medicine; University of Leipzig; Leipzig Germany
| | - Tim J. Schulz
- Department of Adipocyte Development and Nutrition; German Institute of Human Nutrition; Potsdam-Rehbrücke Germany
- University of Potsdam, Institute of Nutritional Science; Potsdam-Rehbrücke Germany
- German Center for Diabetes Research (DZD); Munich-Neuherberg Germany
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10
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Ketogenic diet induces expression of the muscle circadian gene Slc25a25 via neural pathway that might be involved in muscle thermogenesis. Sci Rep 2017; 7:2885. [PMID: 28588221 PMCID: PMC5460244 DOI: 10.1038/s41598-017-03119-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 04/24/2017] [Indexed: 12/14/2022] Open
Abstract
We recently found that the mRNA expression of Slc25a25, a Ca2+-sensitive ATP carrier in the inner mitochondrial membrane, fluctuates in a circadian manner in mouse skeletal muscle. We showed here that the circadian expression of muscle Slc25a25 was damped in Clock mutant, muscle-specific Bmal1-deficient, and global Bmal1-deficient mice. Furthermore, a ketogenic diet (KD) that induces time-of-day-dependent hypothermia (torpor), induced Slc25a25 mRNA expression in skeletal muscle. Hypothermia induced by KD did not affect thermogenic genes such as Sarcolipin and Pgc1a in muscles and Ucp1 in adipose tissues. Sciatic denervation abolished circadian and KD-induced Slc25a25 expression, suggesting that the circadian clock regulates muscle Slc25a25 expression via neural pathways. We measured body temperature (Tb) in sciatic denervated mice fed with KD to determine the functional role of KD-induced Slc25a25 expression. Sciatic denervation abolished Slc25a25 expression and augmented KD-induced hypothermia compared with sham-operated mice, but did not affect Tb in mice given a normal diet. These findings suggest that KD feeding induces expression of the muscle circadian gene Slc25a25 via neural pathways, and that SLC25A25 might be involved in muscle thermogenesis under KD-induced hypothermia in mammals.
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11
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Keil G, Cummings E, de Magalhães JP. Being cool: how body temperature influences ageing and longevity. Biogerontology 2015; 16:383-97. [PMID: 25832892 PMCID: PMC4486781 DOI: 10.1007/s10522-015-9571-2] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 03/24/2015] [Indexed: 12/12/2022]
Abstract
Temperature is a basic and essential property of any physical system, including living systems. Even modest variations in temperature can have profound effects on organisms, and it has long been thought that as metabolism increases at higher temperatures so should rates of ageing. Here, we review the literature on how temperature affects longevity, ageing and life history traits. From poikilotherms to homeotherms, there is a clear trend for lower temperature being associated with longer lifespans both in wild populations and in laboratory conditions. Many life-extending manipulations in rodents, such as caloric restriction, also decrease core body temperature. Nonetheless, an inverse relationship between temperature and lifespan can be obscured or reversed, especially when the range of body temperatures is small as in homeotherms. An example is observed in humans: women appear to have a slightly higher body temperature and yet live longer than men. The mechanisms involved in the relationship between temperature and longevity also appear to be less direct than once thought with neuroendocrine processes possibly mediating complex physiological responses to temperature changes. Lastly, we discuss species differences in longevity in mammals and how this relates to body temperature and argue that the low temperature of the long-lived naked mole-rat possibly contributes to its exceptional longevity.
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Affiliation(s)
- Gerald Keil
- Integrative Genomics of Ageing Group, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB UK
| | - Elizabeth Cummings
- Integrative Genomics of Ageing Group, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB UK
| | - João Pedro de Magalhães
- Integrative Genomics of Ageing Group, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB UK
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12
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Heiss EH, Kramer MP, Atanasov AG, Beres H, Schachner D, Dirsch VM. Glycolytic switch in response to betulinic acid in non-cancer cells. PLoS One 2014; 9:e115683. [PMID: 25531780 PMCID: PMC4274109 DOI: 10.1371/journal.pone.0115683] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 12/01/2014] [Indexed: 12/21/2022] Open
Abstract
The naturally occurring triterpenoid betulinic acid (BA) shows pronounced polypharmacology ranging from anti-inflammatory to anti-lipogenic activities. Recent evidence suggests that rather diverse cellular signaling events may be attributed to the same common upstream switch in cellular metabolism. In this study we therefore examined the metabolic changes induced by BA (10 µM) administration, with focus on cellular glucose metabolism. We demonstrate that BA elevates the rates of cellular glucose uptake and aerobic glycolysis in mouse embryonic fibroblasts with concomitant reduction of glucose oxidation. Without eliciting signs of obvious cell death BA leads to compromised mitochondrial function, increased expression of mitochondrial uncoupling proteins (UCP) 1 and 2, and liver kinase B1 (LKB1)-dependent activation AMP-activated protein kinase. AMPK activation accounts for the increased glucose uptake and glycolysis which in turn are indispensable for cell viability upon BA treatment. Overall, we show for the first time a significant impact of BA on cellular bioenergetics which may be a central mediator of the pleiotropic actions of BA.
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Affiliation(s)
- Elke H. Heiss
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Matthias P. Kramer
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Atanas G. Atanasov
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Hortenzia Beres
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Daniel Schachner
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
| | - Verena M. Dirsch
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, 1090, Vienna, Austria
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13
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Terrien J, Zizzari P, Bluet-Pajot MT, Henry PY, Perret M, Epelbaum J, Aujard F. Effects of age on thermoregulatory responses during cold exposure in a nonhuman primate, Microcebus murinus. Am J Physiol Regul Integr Comp Physiol 2008; 295:R696-703. [DOI: 10.1152/ajpregu.00629.2007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cold resistance appears altered with aging. Among existing hypotheses, the impaired capacity in response to cold could be related to an altered regulation of plasma IGF-1 concentration. The combined effects of age and cold exposure were studied in a short-living primate, the gray mouse lemur ( Microcebus murinus), which adjusts its energy balance using a daily torpor phase, to avoid high energy cost of normothermia maintenance. Changes in body mass, core temperature, locomotor activity, and caloric intake were monitored under 9-day exposures to 25°C and 12°C in captive animals in winter conditions. Short-term (after 2 days) and long-term (after 9 days) cold-induced changes in IGF-1 levels were also evaluated. In thermoneutral conditions (25°C), general characteristics of the daily rhythm of core temperature were preserved with age. At 12°C, age-related changes were mainly characterized by a deeper hypothermia and an increased frequency of torpor phases, associated with a loss of body mass. A short-term cold-induced decrease in plasma IGF-1 levels was observed. IGF-1 levels returned to basal values after 9 days of cold exposure. No significant effect of age could be evidenced on IGF-1 response. However, IGF-1 levels of cold-exposed aged animals were negatively correlated with the frequency of daily torpor. Responses exhibited by aged mouse lemurs exposed to cold revealed difficulties in the maintenance of normothermia and energy balance and might involve modulations of IGF-1 levels.
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Abstract
The function of brown adipose tissue is to transfer energy from food into heat; physiologically, both the heat produced and the resulting decrease in metabolic efficiency can be of significance. Both the acute activity of the tissue, i.e., the heat production, and the recruitment process in the tissue (that results in a higher thermogenic capacity) are under the control of norepinephrine released from sympathetic nerves. In thermoregulatory thermogenesis, brown adipose tissue is essential for classical nonshivering thermogenesis (this phenomenon does not exist in the absence of functional brown adipose tissue), as well as for the cold acclimation-recruited norepinephrine-induced thermogenesis. Heat production from brown adipose tissue is activated whenever the organism is in need of extra heat, e.g., postnatally, during entry into a febrile state, and during arousal from hibernation, and the rate of thermogenesis is centrally controlled via a pathway initiated in the hypothalamus. Feeding as such also results in activation of brown adipose tissue; a series of diets, apparently all characterized by being low in protein, result in a leptin-dependent recruitment of the tissue; this metaboloregulatory thermogenesis is also under hypothalamic control. When the tissue is active, high amounts of lipids and glucose are combusted in the tissue. The development of brown adipose tissue with its characteristic protein, uncoupling protein-1 (UCP1), was probably determinative for the evolutionary success of mammals, as its thermogenesis enhances neonatal survival and allows for active life even in cold surroundings.
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Affiliation(s)
- Barbara Cannon
- The Wenner-Gren Institute, The Arrhenius Laboratories F3, Stockholm University, Stockholm, Sweden
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15
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Buchanan JB, Peloso E, Satinoff E. Thermoregulatory and metabolic changes during fever in young and old rats. Am J Physiol Regul Integr Comp Physiol 2003; 285:R1165-9. [PMID: 12893653 DOI: 10.1152/ajpregu.00238.2003] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We injected old and young rats with lipopolysaccharide (LPS; 50 microg/kg ip) at two ambient temperatures (Ta; 21 and 31 degrees C). Young rats mounted equivalent fevers at both Tas [peak body temperatures (Tb) of 38.3 and 38.7 degrees C, respectively]. The Tb of old rats was not different from baseline (37.3 degrees C) after LPS at Ta 21 degrees C, whereas, at 31 degrees C, their Tb rose to a mean peak of 38.4 degrees C. We also measured the associated thermoregulatory responses by use of calorimetry. At 21 degrees C, young rats developed a fever by increasing both O2 consumption and heat conservation. Old rats did not become febrile, and O2 consumption fell by 15%. Heat loss was the same in old and young rats. At 31 degrees C, young and old rats developed similar fevers with similar increases in heat production and conservation. Our results suggest that the lack of LPS fever in old rats at 21 degrees C is due mainly to the lowered metabolic rate.
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