1
|
Serano M, Paolini C, Michelucci A, Pietrangelo L, Guarnier FA, Protasi F. High-Fat Diet Impairs Muscle Function and Increases the Risk of Environmental Heatstroke in Mice. Int J Mol Sci 2022; 23:5286. [PMID: 35563676 PMCID: PMC9104075 DOI: 10.3390/ijms23095286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/04/2022] [Accepted: 05/06/2022] [Indexed: 02/06/2023] Open
Abstract
Environmental heat-stroke (HS) is a life-threatening response often triggered by hot and humid weather. Several lines of evidence indicate that HS is caused by excessive heat production in skeletal muscle, which in turn is the result of abnormal Ca2+ leak from the sarcoplasmic reticulum (SR) and excessive production of oxidative species of oxygen and nitrogen. As a high fat diet is known to increase oxidative stress, the objective of the present study was to investigate the effects of 3 months of high-fat diet (HFD) on the HS susceptibility of wild type (WT) mice. HS susceptibility was tested in an environmental chamber where 4 months old WT mice were exposed to heat stress (41 °C for 1 h). In comparison with mice fed with a regular diet, mice fed with HFD showed: (a) increased body weight and accumulation of adipose tissue; (b) elevated oxidative stress in skeletal muscles; (c) increased heat generation and oxygen consumption during exposure to heat stress; and finally, (d) enhanced sensitivity to both temperature and caffeine of isolated muscles during in-vitro contracture test. These data (a) suggest that HFD predisposes WT mice to heat stress and (b) could have implications for guidelines regarding food intake during periods of intense environmental heat.
Collapse
Affiliation(s)
- Matteo Serano
- CAST, Center for Advanced Studies and Technology, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (C.P.); (A.M.); (L.P.)
- DMSI, Department of Medicine and Aging Sciences, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Cecilia Paolini
- CAST, Center for Advanced Studies and Technology, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (C.P.); (A.M.); (L.P.)
- DNICS, Department of Neuroscience and Clinical Sciences, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Antonio Michelucci
- CAST, Center for Advanced Studies and Technology, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (C.P.); (A.M.); (L.P.)
| | - Laura Pietrangelo
- CAST, Center for Advanced Studies and Technology, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (C.P.); (A.M.); (L.P.)
- DMSI, Department of Medicine and Aging Sciences, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| | - Flavia A. Guarnier
- Department of General Pathology, Londrina State University, Londrina 86057-970, Brazil;
| | - Feliciano Protasi
- CAST, Center for Advanced Studies and Technology, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (C.P.); (A.M.); (L.P.)
- DMSI, Department of Medicine and Aging Sciences, University G. D’Annunzio of Chieti-Pescara, 66100 Chieti, Italy
| |
Collapse
|
2
|
Wang L, Liu X, Liu S, Niu Y, Fu L. Sestrin2 ablation attenuates the exercise-induced browning of white adipose tissue in C57BL/6J mice. Acta Physiol (Oxf) 2022; 234:e13785. [PMID: 34995401 DOI: 10.1111/apha.13785] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 12/29/2021] [Accepted: 01/03/2022] [Indexed: 01/11/2023]
Abstract
AIM With exercise, white adipose tissues (WAT) are readily convertible to a "brown-like" state, altering from lipid-storing to energy-catabolizing function, which counteracts obesity and increases insulin sensitivity. Sestrin2 (SESN2) is a stress-inducible protein that can regulate the cold-induced increase of uncoupling protein 1 (UCP1), which is paramount for the thermogenic capacity of brown-like WAT. This study aimed to elucidate the necessity of SESN2 in mediating exercise-induced browning of WAT. METHODS We used 8-week, male wild-type and SESN2 knockout C57BL/6J mice to explore the potential role of SESN2 in the exercise-induced WAT browning process. Over a 3-week intervention (sedentary versus treadmill exercise, normal chow versus 60% high-fat diet), we examined the exercise-induced alterations of the browning phenotype in different depots of white fat. In vitro, 3T3-L1 pre-adipocytes and primary adipocytes were used to determine the potential mechanism. RESULTS Our data revealed that SESN2 was required for the exercise-induced subcutaneous WAT (scWAT) browning. This may be mediated by higher fibronectin type III domain containing 5 (FNDC5) contents in scWAT locally, rather than skeletal muscle FNDC5 expression and circulating serum irisin levels. SESN2 ablation significantly impaired the exercise-improved glucose metabolism, where browning of scWAT may serve as an essential pathway. Moreover, SESN2 ablation significantly attenuated the exercise-promoted respiratory exchange ratio and indexes of energy metabolism (oxygen uptake and energy expenditure). CONCLUSION Taken together, our results provided evidence that SESN2 is a key integrating factor in driving the diverse metabolic benefits conferred by aerobic exercise.
Collapse
Affiliation(s)
- Lu Wang
- Department of Rehabilitation School of Medical Technology Tianjin Medical University Tianjin China
| | - Xinmeng Liu
- Department of Rehabilitation School of Medical Technology Tianjin Medical University Tianjin China
| | - Sujuan Liu
- Department of Anatomy and Histology School of Basic Medical Science Tianjin Medical University Tianjin China
| | - Yanmei Niu
- Department of Rehabilitation School of Medical Technology Tianjin Medical University Tianjin China
| | - Li Fu
- Department of Rehabilitation School of Medical Technology Tianjin Medical University Tianjin China
- Department of Physiology and Pathophysiology School of Basic Medical Science Tianjin Medical University Tianjin China
| |
Collapse
|
3
|
Sun Q, Yang Y, Wang Z, Yang X, Gao Y, Zhao Y, Ge W, Liu J, Xu X, Guan W, Weng D, Wang S, Wang J, Zhang J. PER1 interaction with GPX1 regulates metabolic homeostasis under oxidative stress. Redox Biol 2020; 37:101694. [PMID: 32896721 PMCID: PMC7484554 DOI: 10.1016/j.redox.2020.101694] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/29/2020] [Accepted: 08/15/2020] [Indexed: 02/07/2023] Open
Abstract
Metabolism serves mammalian feeding and active behavior, and is controlled by circadian clock. The molecular mechanism by which clock factors regulate metabolic homeostasis under oxidative stress is unclear. Here, we have characterized that the daily oxygen consumption rhythm was deregulated in Per1 deficient mice. Per1 deficiency impaired daily mitochondrial dynamics and deregulated cellular GPx-related ROS fluctuations in the peripheral organs. We identified that PER1 enhanced GPx activity through PER1/GPX1 interaction in cytoplasm, consequently improving the oxidative phosphorylation efficiency of mitochondria. Per1 expression was specifically elevated in the fasting peripheral organs for protecting mitochondrial from oxidation stress. These observations reveal that Per1-driven mitochondrial dynamics is a critical effector mechanism for the regulation of mitochondrial function in response to oxidation stress. PER1 regulates daily metabolic rhythm uncoupled from feeding oscillations. Per1 deficiency impairs mitochondrial dynamics and deregulates ROS fluctuations. PER1 interactions with GPX1 and increases mitochondrial ROS clearance. Fasting elevates Per1 expression to protect mitochondrial from oxidation stress.
Collapse
Affiliation(s)
- Qi Sun
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China; Key Laboratory of Cardiovascular and Cerebrovascular Diseases, Bengbu Medical College, Bengbu, 233030, China
| | - Yunxia Yang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Zhongqiu Wang
- Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, 210029, China
| | - Xiao Yang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Yan Gao
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Yang Zhao
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Wenhao Ge
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Junhao Liu
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Xi Xu
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Wei Guan
- The Second Hospital of Nanjing, Nanjing Medical University, Nanjing, 210003, China
| | - Dan Weng
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Shiming Wang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Junsong Wang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China
| | - Jianfa Zhang
- Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing, 210094, China.
| |
Collapse
|
4
|
Tourki B, Kain V, Shaikh SR, Leroy X, Serhan CN, Halade GV. Deficit of resolution receptor magnifies inflammatory leukocyte directed cardiorenal and endothelial dysfunction with signs of cardiomyopathy of obesity. FASEB J 2020; 34:10560-10573. [PMID: 32543720 DOI: 10.1096/fj.202000495rr] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 05/22/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022]
Abstract
Chronic unresolved inflammation is the primary determinant of cardiovascular disease. Precise mechanisms that define the genesis of unresolved inflammation in heart failure with preserved ejection fraction (HFpEF) are of interest due to the obesity epidemic. To examine the obesity phenotype and its direct/indirect consequences, multiple approaches were employed using the lipoxin receptor (abbreviated as ALX) dysfunction mouse model. Indirect calorimetry analyses revealed that the deletion of ALX dysregulated energy metabolism driving toward age-related obesity. Heart function data suggest that obesity-prone ALX deficient mice had impaired myocardium strain. Comprehensive measurement of chemokines, extracellular matrix, and arrhythmogenic arrays confirmed the dysregulation of multiple ion channels gene expression with amplified inflammatory chemokines and cytokines response at the age of 4 months compared with WT counterparts. Quantitative analyses of leukocytes demonstrated an increase of proinflammatory Ly6Chi CCR2+ macrophages in the spleen and heart at a steady-state resulting in an inflamed splenocardiac axis. Signs of subtle inflammation were marked with cardiorenal, endothelial defects with decreased CD31 and eNOS and an increased iNOS and COX2 expression. Thus, ALX receptor deficiency serves as an experimental model that defines multiple cellular and molecular mechanisms in HFpEF that could be a target for the development of HFpEF therapy in cardiovascular medicine.
Collapse
Affiliation(s)
- Bochra Tourki
- Division of Cardiovascular Sciences, Department of Medicine, University of South Florida, Tampa, FL, USA
| | - Vasundhara Kain
- Division of Cardiovascular Sciences, Department of Medicine, University of South Florida, Tampa, FL, USA
| | - Saame Raza Shaikh
- Department of Nutrition, Gillings School of Global Public Health and School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | | | - Charles N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ganesh V Halade
- Division of Cardiovascular Sciences, Department of Medicine, University of South Florida, Tampa, FL, USA
| |
Collapse
|
5
|
Diurnal influences of fasted and non-fasted brisk walking on gastric emptying rate, metabolic responses, and appetite in healthy males. Appetite 2019; 143:104411. [DOI: 10.1016/j.appet.2019.104411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 08/07/2019] [Accepted: 08/19/2019] [Indexed: 01/21/2023]
|
6
|
Ali Abulmeaty MM, Almajwal AM, ElSadek MF, Berika MY, Razak S. Metabolic Effects of Testosterone Hormone Therapy in Normal and Orchiectomized Male Rats: From Indirect Calorimetry to Lipolytic Enzymes. Int J Endocrinol 2019; 2019:7546385. [PMID: 31871453 PMCID: PMC6906878 DOI: 10.1155/2019/7546385] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/02/2019] [Accepted: 10/10/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND AND AIM Changes in total energy expenditure (TEE) and substrate metabolism may help explain the metabolic actions of testosterone (T). This study measured respiratory quotient (RQ), TEE, ghrelin, insulin, and key lipolysis enzyme concentrations in relation to body weight (wt) and food intake (FI) in both normal and bilaterally orchiectomized rats with/without T treatment. METHODS In total, thirty-two male Wistar rats (300-400 g) were divided into four groups (n = 8/group), including (a) sham-operated and vehicle-injected group (Sham), (b) T-treated sham group (T-Sham) for which sham-operated rats were injected with IM testosterone undecanoate (100 mg/kg, for one week), (c) orchiectomy and vehicle-injected group (Orch), and (d) T-replaced orchiectomy group (T-Orch). After one week, FI and wt were automatically recorded, indirect calorimetry parameters were measured, and blood samples were collected to measure T, ghrelin, insulin, growth hormone (GH), glucose, hormone-sensitive lipase (HSL), adipocyte triglyceride lipase (ATGL), free fatty acids (FFA), and lipid profiles. RESULTS Orchiectomy decreased ghrelin, GH, and insulin levels, increased TEE and RQ, and lowered FI and wt. The T-Orch group exhibited increased levels of ghrelin (3-fold), insulin, GH, blood levels of lipolysis products, TEE, and FI in addition to reduced glucose levels (P < 0.05). This group demonstrated no significant changes in wt. In the T-Sham group, T increased ghrelin and insulin levels (P < 0.05) with strong positive correlations (r = 0.663 and 0.644, respectively, P < 0.05), increased ATGL levels, RQ toward carbohydrate utilization ranges, and TEE, and reduced HSL levels (P < 0.05) with insignificant changes in FI or wt. CONCLUSIONS T administration in orchiectomized rats significantly increased orexigenic mediators such as ghrelin and insulin without inducing any significant changes in wt. The mechanism for this finding might be the increased TEE and the stimulation of lipolysis through the ATGL enzyme. The associated rise of GH might help in interference with accumulation of lipid in adipose tissue. Apart from the effect on GH, T-Sham showed similar effects of T supplementation.
Collapse
Affiliation(s)
- Mahmoud Mustafa Ali Abulmeaty
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
- Medical Physiology Department, School of Medicine, Zagazig University, Zagazig, Egypt
| | - Ali Madi Almajwal
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed Farouk ElSadek
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
- Nutrition and Food Science Department, Faculty of Home Economics, Helwan University, Helwan, Egypt
| | - Mohamed Y Berika
- Rehabilitation Sciences Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
- Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Suhail Razak
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| |
Collapse
|
7
|
Borck PC, Vettorazzi JF, Branco RCS, Batista TM, Santos-Silva JC, Nakanishi VY, Boschero AC, Ribeiro RA, Carneiro EM. Taurine supplementation induces long-term beneficial effects on glucose homeostasis in ob/ob mice. Amino Acids 2018; 50:765-774. [DOI: 10.1007/s00726-018-2553-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 03/11/2018] [Indexed: 10/17/2022]
|
8
|
Abreu-Vieira G, Xiao C, Gavrilova O, Reitman ML. Integration of body temperature into the analysis of energy expenditure in the mouse. Mol Metab 2015; 4:461-70. [PMID: 26042200 PMCID: PMC4443293 DOI: 10.1016/j.molmet.2015.03.001] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 02/26/2015] [Accepted: 03/03/2015] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVES We quantified the effect of environmental temperature on mouse energy homeostasis and body temperature. METHODS The effect of environmental temperature (4-33 °C) on body temperature, energy expenditure, physical activity, and food intake in various mice (chow diet, high-fat diet, Brs3 (-/y) , lipodystrophic) was measured using continuous monitoring. RESULTS Body temperature depended most on circadian phase and physical activity, but also on environmental temperature. The amounts of energy expenditure due to basal metabolic rate (calculated via a novel method), thermic effect of food, physical activity, and cold-induced thermogenesis were determined as a function of environmental temperature. The measured resting defended body temperature matched that calculated from the energy expenditure using Fourier's law of heat conduction. Mice defended a higher body temperature during physical activity. The cost of the warmer body temperature during the active phase is 4-16% of total daily energy expenditure. Parameters measured in diet-induced obese and Brs3 (-/y) mice were similar to controls. The high post-mortem heat conductance demonstrates that most insulation in mice is via physiological mechanisms. CONCLUSIONS At 22 °C, cold-induced thermogenesis is ∼120% of basal metabolic rate. The higher body temperature during physical activity is due to a higher set point, not simply increased heat generation during exercise. Most insulation in mice is via physiological mechanisms, with little from fur or fat. Our analysis suggests that the definition of the upper limit of the thermoneutral zone should be re-considered. Measuring body temperature informs interpretation of energy expenditure data and improves the predictiveness and utility of the mouse to model human energy homeostasis.
Collapse
Key Words
- BMR, basal metabolic rate
- Basal metabolic rate
- Body temperature
- CIT, cold-induced thermogenesis
- Cold-induced thermogenesis
- EE, energy expenditure
- Energy expenditure
- HFD, high-fat diet
- Heat conductance
- LCT, lower critical temperature
- PAEE, physical activity energy expenditure
- RQ, respiratory quotient
- TEE, total energy expenditure
- TEF, thermic effect of food
- Ta, environmental temperature
- Tb, core body temperature
- Thermoneutrality
- dTb, defended body temperature
Collapse
Affiliation(s)
- Gustavo Abreu-Vieira
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD 20892, USA
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, 106 91 Stockholm, Sweden
| | - Cuiying Xiao
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD 20892, USA
| | - Oksana Gavrilova
- Mouse Metabolism Core, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD 20892, USA
| | - Marc L. Reitman
- Diabetes, Endocrinology, and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD 20892, USA
| |
Collapse
|
9
|
Abstract
In association with sleep-wake and fasting-feeding cycles, organisms experience dramatic oscillations in energetic demands and nutrient supply. It is therefore not surprising that various metabolic parameters, ranging from the activity status of molecular energy sensors to circulating nutrient levels, oscillate in time-of-day-dependent manners. It has become increasingly clear that rhythms in metabolic processes are not simply in response to daily environmental/behavioral influences, but are driven in part by cell autonomous circadian clocks. By synchronizing the cell with its environment, clocks modulate a host of metabolic processes in a temporally appropriate manner. The purpose of this article is to review current understanding of the interplay between circadian clocks and metabolism, in addition to the pathophysiologic consequences of disruption of this molecular mechanism, in terms of cardiometabolic disease development.
Collapse
Affiliation(s)
- Shannon M Bailey
- Division of Molecular and Cellular PathologyDepartment of PathologyDivision of Cardiovascular DiseasesDepartment of Medicine, University of Alabama at Birmingham, 703 19th Street South, ZRB 308, Birmingham, Alabama 35294, USA
| | - Uduak S Udoh
- Division of Molecular and Cellular PathologyDepartment of PathologyDivision of Cardiovascular DiseasesDepartment of Medicine, University of Alabama at Birmingham, 703 19th Street South, ZRB 308, Birmingham, Alabama 35294, USA
| | - Martin E Young
- Division of Molecular and Cellular PathologyDepartment of PathologyDivision of Cardiovascular DiseasesDepartment of Medicine, University of Alabama at Birmingham, 703 19th Street South, ZRB 308, Birmingham, Alabama 35294, USA
| |
Collapse
|
10
|
Pauter AM, Olsson P, Asadi A, Herslöf B, Csikasz RI, Zadravec D, Jacobsson A. Elovl2 ablation demonstrates that systemic DHA is endogenously produced and is essential for lipid homeostasis in mice. J Lipid Res 2014; 55:718-28. [PMID: 24489111 PMCID: PMC3966705 DOI: 10.1194/jlr.m046151] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The potential role of endogenously synthesized PUFAs is a highly overlooked area. Elongation of very long-chain fatty acids (ELOVLs) in mammals is catalyzed by the ELOVL enzymes to which the PUFA elongase ELOVL2 belongs. To determine its in vivo function, we have investigated how ablation of ELOVL2, which is highly expressed in liver, affects hepatic lipid composition and function in mice. The Elovl2(-/-) mice displayed substantially decreased levels of 22:6(n-3), DHA, and 22:5(n-6), docosapentaenoic acid (DPA) n-6, and an accumulation of 22:5(n-3) and 22:4(n-6) in both liver and serum, showing that ELOVL2 primarily controls the elongation process of PUFAs with 22 carbons to produce 24-carbon precursors for DHA and DPAn-6 formation in vivo. The impaired PUFA levels positively influenced hepatic levels of the key lipogenic transcriptional regulator sterol-regulatory element binding protein 1c (SREBP-1c), as well as its downstream target genes. Surprisingly, the Elovl2(-/-) mice were resistant to hepatic steatosis and diet-induced weight gain, implying that hepatic DHA synthesis via ELOVL2, in addition to controlling de novo lipogenesis, also regulates lipid storage and fat mass expansion in an SREBP-1c-independent fashion. The changes in fatty acid metabolism were reversed by dietary supplementation with DHA.
Collapse
Affiliation(s)
- Anna M Pauter
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-10691 Stockholm, Sweden; and
| | | | | | | | | | | | | |
Collapse
|
11
|
Pacheco-López G, Giovanoli S, Langhans W, Meyer U. Priming of metabolic dysfunctions by prenatal immune activation in mice: relevance to schizophrenia. Schizophr Bull 2013; 39:319-29. [PMID: 22186136 PMCID: PMC3576156 DOI: 10.1093/schbul/sbr178] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Schizophrenia is associated with increased risk for multiple metabolic abnormalities, including altered glucose homeostasis, type-2 diabetes, obesity, and cardiovascular disease. Some of the metabolic alterations can already exist in psychosis-prone subjects prior to the onset of chronic schizophrenic disease and pharmacotherapy, indicating that they may have a developmental origin. In the present study, we tested the hypothesis that metabolic alterations pertinent to schizophrenic disease can be primed by an environmental risk factor associated with the disorder, namely prenatal exposure to immune challenge. We used a well-established mouse model of prenatal immune challenge induced by maternal gestational treatment with poly(I:C) (="polyriboinosinic-polyribocytidilic acid"), an analog of double-stranded RNA that stimulates a cytokine-associated viral-like acute phase response. Metabolic effects were studied using high-resolution computed tomography and fully automated indirect calorimetry system, along with an oral glucose tolerance test and plasma cytokine and corticosterone measurements. We found that prenatal immune activation caused altered glycemic regulation and abnormal ingestive behavior in periadolescence and led to an adult onset of excess visceral and subcutaneous fat deposition. These effects were accompanied by age-dependent changes in peripheral secretion of proinflammatory (interleukin [IL]-6 and tumor necrosis factor [TNF]-α) and T cell-related (IL-2 and interferon [IFN]-γ) cytokines and by increased release of the stress hormone corticosterone in periadolescence. Our findings show that schizophrenia-relevant metabolic and physiological abnormalities can be primed by prenatal viral-like immune activation, but at the same time, our study emphasizes that this environmental insult is unlikely to precipitate the full spectrum of metabolic and immunological changes pertinent to chronic schizophrenic disease.
Collapse
Affiliation(s)
| | | | | | - Urs Meyer
- To whom correspondence should be addressed; tel: +41-44-655-7403, fax: +41-44-655-7203, e-mail:
| |
Collapse
|
12
|
Virtue S, Feldmann H, Christian M, Tan CY, Masoodi M, Dale M, Lelliott C, Burling K, Campbell M, Eguchi N, Voshol P, Sethi JK, Parker M, Urade Y, Griffin JL, Cannon B, Vidal-Puig A. A new role for lipocalin prostaglandin d synthase in the regulation of brown adipose tissue substrate utilization. Diabetes 2012; 61:3139-47. [PMID: 22923471 PMCID: PMC3501861 DOI: 10.2337/db12-0015] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 06/13/2012] [Indexed: 01/10/2023]
Abstract
In this study, we define a new role for lipocalin prostaglandin D synthase (L-PGDS) in the control of metabolic fuel utilization by brown adipose tissue (BAT). We demonstrate that L-PGDS expression in BAT is positively correlated with BAT activity, upregulated by peroxisome proliferator-activated receptor γ coactivator 1α or 1β and repressed by receptor-interacting protein 140. Under cold-acclimated conditions, mice lacking L-PGDS had elevated reliance on carbohydrate to provide fuel for thermogenesis and had increased expression of genes regulating glycolysis and de novo lipogenesis in BAT. These transcriptional differences were associated with increased lipid content in BAT and a BAT lipid composition enriched with de novo synthesized lipids. Consistent with the concept that lack of L-PGDS increases glucose utilization, mice lacking L-PGDS had improved glucose tolerance after high-fat feeding. The improved glucose tolerance appeared to be independent of changes in insulin sensitivity, as insulin levels during the glucose tolerance test and insulin, leptin, and adiponectin levels were unchanged. Moreover, L-PGDS knockout mice exhibited increased expression of genes involved in thermogenesis and increased norepinephrine-stimulated glucose uptake to BAT, suggesting that sympathetically mediated changes in glucose uptake may have improved glucose tolerance. Taken together, these results suggest that L-PGDS plays an important role in the regulation of glucose utilization in vivo.
Collapse
Affiliation(s)
- Sam Virtue
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| | - Helena Feldmann
- Wenner-Gren Institute, University of Stockholm, Stockholm, Sweden
| | - Mark Christian
- Molecular Endocrinology Laboratory, Institute of Reproductive and Developmental Biology, Imperial College London, London, U.K
| | - Chong Yew Tan
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| | - Mojgan Masoodi
- Human Nutrition Research and the Department of Biochemistry, Medical Research Council, Cambridge, U.K
| | - Martin Dale
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| | - Chris Lelliott
- Department of Research and Development, AstraZeneca, Mölndal, Sweden
| | - Keith Burling
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| | - Mark Campbell
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| | | | - Peter Voshol
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| | - Jaswinder K. Sethi
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| | - Malcolm Parker
- Molecular Endocrinology Laboratory, Institute of Reproductive and Developmental Biology, Imperial College London, London, U.K
| | | | - Julian L. Griffin
- Human Nutrition Research and the Department of Biochemistry, Medical Research Council, Cambridge, U.K
| | - Barbara Cannon
- Wenner-Gren Institute, University of Stockholm, Stockholm, Sweden
| | - Antonio Vidal-Puig
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke’s Treatment Centre, Addenbrooke’s Hospital, Cambridge, U.K
| |
Collapse
|
13
|
Virtue S, Masoodi M, Velagapudi V, Tan CY, Dale M, Suorti T, Slawik M, Blount M, Burling K, Campbell M, Eguchi N, Medina-Gomez G, Sethi JK, Orešič M, Urade Y, Griffin JL, Vidal-Puig A. Lipocalin prostaglandin D synthase and PPARγ2 coordinate to regulate carbohydrate and lipid metabolism in vivo. PLoS One 2012; 7:e39512. [PMID: 22792179 PMCID: PMC3390315 DOI: 10.1371/journal.pone.0039512] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Accepted: 05/22/2012] [Indexed: 12/15/2022] Open
Abstract
Mice lacking Peroxisome Proliferator-Activated Receptor γ2 (PPARγ2) have unexpectedly normal glucose tolerance and mild insulin resistance. Mice lacking PPARγ2 were found to have elevated levels of Lipocalin prostaglandin D synthase (L-PGDS) expression in BAT and subcutaneous white adipose tissue (WAT). To determine if induction of L-PGDS was compensating for a lack of PPARγ2, we crossed L-PGDS KO mice to PPARγ2 KO mice to generate Double Knock Out mice (DKO). Using DKO mice we demonstrated a requirement of L-PGDS for maintenance of subcutaneous WAT (scWAT) function. In scWAT, DKO mice had reduced expression of thermogenic genes, the de novo lipogenic program and the lipases ATGL and HSL. Despite the reduction in markers of lipolysis in scWAT, DKO mice had a normal metabolic rate and elevated serum FFA levels compared to L-PGDS KO alone. Analysis of intra-abdominal white adipose tissue (epididymal WAT) showed elevated expression of mRNA and protein markers of lipolysis in DKO mice, suggesting that DKO mice may become more reliant on intra-abdominal WAT to supply lipid for oxidation. This switch in depot utilisation from subcutaneous to epididymal white adipose tissue was associated with a worsening of whole organism metabolic function, with DKO mice being glucose intolerant, and having elevated serum triglyceride levels compared to any other genotype. Overall, L-PGDS and PPARγ2 coordinate to regulate carbohydrate and lipid metabolism.
Collapse
Affiliation(s)
- Sam Virtue
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| | - Mojgan Masoodi
- Elsie Widdowson Laboratory, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | | | - Chong Yew Tan
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| | - Martin Dale
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| | - Tapani Suorti
- VTT Technical Research Centre of Finland, Espoo, Finland
| | - Marc Slawik
- Department of Medicine Innenstadt, Endocrinology/Diabetes University Hospital, Munich, Germany
| | - Margaret Blount
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| | - Keith Burling
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| | - Mark Campbell
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| | | | - Gema Medina-Gomez
- Departamento de Bioquímica, Fisiología y Genética Molecular, Universidad Rey Juan Carlos, Madrid, Spain
| | - Jaswinder K. Sethi
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| | - Matej Orešič
- VTT Technical Research Centre of Finland, Espoo, Finland
| | | | - Julian L. Griffin
- Department of Biochemistry, Medical Research Council Human Nutrition Research, Cambridge, United Kingdom
| | - Antonio Vidal-Puig
- University of Cambridge Metabolic Research Laboratories, Institute of Metabolic Science, Cambridge, United Kingdom
| |
Collapse
|
14
|
Whittle A, Carobbio S, Martins L, Slawik M, Hondares E, Vázquez M, Morgan D, Csikasz R, Gallego R, Rodriguez-Cuenca S, Dale M, Virtue S, Villarroya F, Cannon B, Rahmouni K, López M, Vidal-Puig A. BMP8B increases brown adipose tissue thermogenesis through both central and peripheral actions. Cell 2012; 149:871-85. [PMID: 22579288 PMCID: PMC3383997 DOI: 10.1016/j.cell.2012.02.066] [Citation(s) in RCA: 444] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 12/06/2011] [Accepted: 02/20/2012] [Indexed: 01/03/2023]
Abstract
Thermogenesis in brown adipose tissue (BAT) is fundamental to energy balance and is also relevant for humans. Bone morphogenetic proteins (BMPs) regulate adipogenesis, and, here, we describe a role for BMP8B in the direct regulation of thermogenesis. BMP8B is induced by nutritional and thermogenic factors in mature BAT, increasing the response to noradrenaline through enhanced p38MAPK/CREB signaling and increased lipase activity. Bmp8b(-/-) mice exhibit impaired thermogenesis and reduced metabolic rate, causing weight gain despite hypophagia. BMP8B is also expressed in the hypothalamus, and Bmp8b(-/-) mice display altered neuropeptide levels and reduced phosphorylation of AMP-activated protein kinase (AMPK), indicating an anorexigenic state. Central BMP8B treatment increased sympathetic activation of BAT, dependent on the status of AMPK in key hypothalamic nuclei. Our results indicate that BMP8B is a thermogenic protein that regulates energy balance in partnership with hypothalamic AMPK. BMP8B may offer a mechanism to specifically increase energy dissipation by BAT.
Collapse
Affiliation(s)
- Andrew J. Whittle
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Stefania Carobbio
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Luís Martins
- Department of Physiology, School of Medicine-CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Marc Slawik
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität, Munich 80336, Germany
| | - Elayne Hondares
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
- Department of Biochemistry and Molecular Biology and Institute of Biomedicine of the University of Barcelona (IBUB), University of Barcelona, Barcelona 08028, Spain
| | - María Jesús Vázquez
- Department of Physiology, School of Medicine-CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Donald Morgan
- Department of Pharmacology, University of Iowa, Iowa City, IA 52242, USA
| | - Robert I. Csikasz
- The Wenner-Gren Institute, Stockholm University, Stockholm SE-106 91, Sweden
| | - Rosalía Gallego
- Department of Morphological Sciences, School of Medicine, University of Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Sergio Rodriguez-Cuenca
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Martin Dale
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Samuel Virtue
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK
| | - Francesc Villarroya
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
- Department of Biochemistry and Molecular Biology and Institute of Biomedicine of the University of Barcelona (IBUB), University of Barcelona, Barcelona 08028, Spain
| | - Barbara Cannon
- The Wenner-Gren Institute, Stockholm University, Stockholm SE-106 91, Sweden
- The Royal Veterinary College, London NW1 0TU, UK
| | - Kamal Rahmouni
- Department of Pharmacology, University of Iowa, Iowa City, IA 52242, USA
- Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Miguel López
- Department of Physiology, School of Medicine-CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Antonio Vidal-Puig
- Metabolic Research Laboratories, Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK
| |
Collapse
|
15
|
Mattsson CL, Csikasz RI, Chernogubova E, Yamamoto DL, Hogberg HT, Amri EZ, Hutchinson DS, Bengtsson T. β₁-Adrenergic receptors increase UCP1 in human MADS brown adipocytes and rescue cold-acclimated β₃-adrenergic receptor-knockout mice via nonshivering thermogenesis. Am J Physiol Endocrinol Metab 2011; 301:E1108-18. [PMID: 21878665 DOI: 10.1152/ajpendo.00085.2011] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
With the finding that brown adipose tissue is present and negatively correlated to obesity in adult man, finding the mechanism(s) of how to activate brown adipose tissue in humans could be important in combating obesity, type 2 diabetes, and their complications. In mice, the main regulator of nonshivering thermogenesis in brown adipose tissue is norepinephrine acting predominantly via β(3)-adrenergic receptors. However, vast majorities of β(3)-adrenergic agonists have so far not been able to stimulate human β(3)-adrenergic receptors or brown adipose tissue activity, and it was postulated that human brown adipose tissue could be regulated instead by β(1)-adrenergic receptors. Therefore, we have investigated the signaling pathways, specifically pathways to nonshivering thermogenesis, in mice lacking β(3)-adrenergic receptors. Wild-type and β(3)-knockout mice were either exposed to acute cold (up to 12 h) or acclimated for 7 wk to cold, and parameters related to metabolism and brown adipose tissue function were investigated. β(3)-knockout mice were able to survive both acute and prolonged cold exposure due to activation of β(1)-adrenergic receptors. Thus, in the absence of β(3)-adrenergic receptors, β(1)-adrenergic receptors are effectively able to signal via cAMP to elicit cAMP-mediated responses and to recruit and activate brown adipose tissue. In addition, we found that in human multipotent adipose-derived stem cells differentiated into functional brown adipocytes, activation of either β(1)-adrenergic receptors or β(3)-adrenergic receptors was able to increase UCP1 mRNA and protein levels. Thus, in humans, β(1)-adrenergic receptors could play an important role in regulating nonshivering thermogenesis.
Collapse
MESH Headings
- Acclimatization/genetics
- Acclimatization/physiology
- Adipocytes, Brown/cytology
- Adipocytes, Brown/metabolism
- Animals
- Cell Differentiation/genetics
- Cell Differentiation/physiology
- Cells, Cultured
- Cold Temperature
- Down-Regulation/genetics
- Epistasis, Genetic/physiology
- Female
- Humans
- Ion Channels/genetics
- Ion Channels/metabolism
- Male
- Mice
- Mice, Knockout
- Mitochondrial Proteins/genetics
- Mitochondrial Proteins/metabolism
- Multipotent Stem Cells/cytology
- Multipotent Stem Cells/metabolism
- Receptors, Adrenergic, beta-1/genetics
- Receptors, Adrenergic, beta-1/metabolism
- Receptors, Adrenergic, beta-1/physiology
- Receptors, Adrenergic, beta-3/genetics
- Shivering/genetics
- Shivering/physiology
- Thermogenesis/genetics
- Thermogenesis/physiology
- Uncoupling Protein 1
Collapse
Affiliation(s)
- Charlotte L Mattsson
- Department of Physiology, The Wenner-Gren Institute, Arrhenius Laboratories F3, Stockholm University, Stockholm, Sweden
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Mattsson CL, Csikasz RI, Shabalina IG, Nedergaard J, Cannon B. Caveolin-1-ablated mice survive in cold by nonshivering thermogenesis despite desensitized adrenergic responsiveness. Am J Physiol Endocrinol Metab 2010; 299:E374-83. [PMID: 20530737 DOI: 10.1152/ajpendo.00071.2010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Caveolin-1 (Cav1)-ablated mice display impaired lipolysis in white adipose tissue. They also seem to have an impairment in brown adipose tissue function, implying that Cav1-ablated mice could encounter problems in surviving longer periods in cold temperatures. To investigate this, Cav1-ablated mice and wild-type mice were transferred to cold temperatures for extended periods of time, and parameters related to metabolism and thermogenesis were investigated. Unexpectedly, the Cav1-ablated mice survived in the cold. There were no differences between Cav1-ablated and wild-type mice with regard to food intake, in behavior related to shivering, or in body temperature. The Cav1-ablated mice had a halved total fat content independently of acclimation temperature. There was no difference in brown adipose tissue uncoupling protein-1 (UCP1) protein amount, and isolated brown fat mitochondria were thermogenically competent but displayed 30% higher thermogenic capacity. However, the beta(3)-adrenergic receptor amount was reduced by about one-third in the Cav1-ablated mice at all acclimation temperatures. Principally in accordance with this, a higher than standard dose of norepinephrine was needed to obtain full norepinephrine-induced thermogenesis in the Cav1-ablated mice; the higher dose was also needed for the Cav1-ablated mice to be able to utilize fat as a substrate for thermogenesis. In conclusion, the ablation of Cav1 impairs brown adipose tissue function by a desensitization of the adrenergic response; however, the desensitization is not evident in the animal as it is overcome physiologically, and Cav1-ablated mice can therefore survive in prolonged cold by nonshivering thermogenesis.
Collapse
|