751
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Nicu C, Pople J, Bonsell L, Bhogal R, Ansell DM, Paus R. A guide to studying human dermal adipocytes in situ. Exp Dermatol 2018; 27:589-602. [DOI: 10.1111/exd.13549] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Carina Nicu
- Centre for Dermatology Research; The University of Manchester; Manchester UK
- NIHR Manchester Biomedical Research Centre; Manchester Academic Health Science Centre; Manchester UK
| | | | - Laura Bonsell
- Centre for Dermatology Research; The University of Manchester; Manchester UK
- NIHR Manchester Biomedical Research Centre; Manchester Academic Health Science Centre; Manchester UK
| | | | - David M. Ansell
- Centre for Dermatology Research; The University of Manchester; Manchester UK
- NIHR Manchester Biomedical Research Centre; Manchester Academic Health Science Centre; Manchester UK
| | - Ralf Paus
- Centre for Dermatology Research; The University of Manchester; Manchester UK
- NIHR Manchester Biomedical Research Centre; Manchester Academic Health Science Centre; Manchester UK
- Department of Dermatology and Cutaneous Surgery; Miller School of Medicine; University of Miami; Miami FL USA
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752
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Cao Y, Wang H, Wang Q, Han X, Zeng W. Three-dimensional volume fluorescence-imaging of vascular plasticity in adipose tissues. Mol Metab 2018; 14:71-81. [PMID: 29914852 PMCID: PMC6034070 DOI: 10.1016/j.molmet.2018.06.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/16/2018] [Accepted: 06/02/2018] [Indexed: 01/16/2023] Open
Abstract
Objective The vascular system is central to sustaining tissue survival and homeostasis. Blood vessels are densely present in adipose tissues and exert essential roles in their metabolism. However, conventional immunohistochemistry methods have intrinsic limitations in examining the 3D vascular network in adipose tissues as well as other organs in general. Methods We established a 3D volume fluorescence-imaging technique to visualize the vasculatures in mouse adipose tissues by combining the optimized steps of whole-mount immunolabeling, tissue optical clearing, and lightsheet volume fluorescence-imaging. To demonstrate the strength of this novel imaging procedure, we comprehensively assessed the intra-adipose vasculatures under obese conditions or in response to a cold challenge. Results We show the entirety of the vascular network in mouse adipose tissues on the whole-tissue level at a single-capillary resolution for the first time in the field. We accurately quantify the pathological changes of vasculatures in adipose tissues in wild-type or obese mice (ob/ob, db/db, or diet-induced obesity). In addition, we identify significant and reversible changes of the intra-adipose vasculatures in the mice subjected to cold challenge (i.e., 4°). Furthermore, we demonstrate that the cold-induced vascular plasticity depends on the sympathetic-derived catecholamine signal and is involved in the beiging process of white adipose tissues. Conclusions We report a 3D volume fluorescence-imaging procedure that is compatible with many areas of vascular research and is poised to serve the field in future investigations of the vascular system in adipose tissues or other research scenarios. 3D vascular network in adipose tissues is visualized at single-capillary resolution. Pathological remodeling of vasculatures is characterized under the obese conditions. Vascular plasticity during cold challenge is involved in the beiging process of WAT. Sympathetic-derived catecholamine signal regulates the vascular plasticity in WAT.
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Affiliation(s)
- Ying Cao
- Center for Life Sciences, Tsinghua University, Beijing, 100084, China; Academy for Advanced Interdisciplinary Studies, Peking University, 100871, Beijing, China
| | - Huanhuan Wang
- School of Life Sciences, Peking University, Beijing, 100871, China
| | - Qi Wang
- Center for Life Sciences, Tsinghua University, Beijing, 100084, China; Academy for Advanced Interdisciplinary Studies, Peking University, 100871, Beijing, China
| | - Xiangli Han
- School of Life Sciences, Peking University, Beijing, 100871, China
| | - Wenwen Zeng
- Center for Life Sciences, Tsinghua University, Beijing, 100084, China; Institute for Immunology and School of Medicine, Tsinghua University, Beijing, 100084, China; Beijing Key Laboratory for Immunological Research on Chronic Diseases, Beijing, 100084, China.
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753
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Celiberto LS, Graef FA, Healey GR, Bosman ES, Jacobson K, Sly LM, Vallance BA. Inflammatory bowel disease and immunonutrition: novel therapeutic approaches through modulation of diet and the gut microbiome. Immunology 2018; 155:36-52. [PMID: 29693729 DOI: 10.1111/imm.12939] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/28/2018] [Accepted: 04/18/2018] [Indexed: 12/11/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a chronic inflammatory condition of the gastrointestinal tract, thought to at least in part reflect an aberrant immune response to gut bacteria. IBD is increasing in incidence, particularly in populations that have recently immigrated to western countries. This suggests that environmental factors are involved in its pathogenesis. We hypothesize that the increase in IBD rates might reflect the consumption of an unhealthy Western diet, containing excess calories and lacking in key nutritional factors, such as fibre and vitamin D. Several recent studies have determined that dietary factors can dramatically influence the activation of immune cells and the mediators they release through a process called immunonutrition. Moreover, dietary changes can profoundly affect the balance of beneficial versus pathogenic bacteria in the gut. This microbial imbalance can alter levels of microbiota-derived metabolites that in turn can influence innate and adaptive intestinal immune responses. If the diet-gut microbiome disease axis does indeed underpin much of the 'western' influence on the onset and progression of IBD, then tremendous opportunity exists for therapeutic changes in lifestyle, to modulate the gut microbiome and to correct immune imbalances in individuals with IBD. This review highlights four such therapeutic strategies - probiotics, prebiotics, vitamin D and caloric restriction - that have the potential to improve and add to current IBD treatment regimens.
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Affiliation(s)
- Larissa S Celiberto
- Department of Paediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Franziska A Graef
- Department of Paediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Genelle R Healey
- Department of Paediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Else S Bosman
- Department of Paediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Kevan Jacobson
- Department of Paediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Laura M Sly
- Department of Paediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Bruce A Vallance
- Department of Paediatrics, BC Children's Hospital, University of British Columbia, Vancouver, BC, Canada
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754
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Mikkola TM, von Bonsdorff MB, Salonen MK, Simonen M, Pohjolainen P, Osmond C, Perälä MM, Rantanen T, Kajantie E, Eriksson JG. Body composition as a predictor of physical performance in older age: A ten-year follow-up of the Helsinki Birth Cohort Study. Arch Gerontol Geriatr 2018; 77:163-168. [PMID: 29783137 DOI: 10.1016/j.archger.2018.05.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 05/08/2018] [Accepted: 05/10/2018] [Indexed: 12/26/2022]
Abstract
BACKGROUND This study assessed how different measures of body composition predict physical performance ten years later among older adults. METHODS The participants were 1076 men and women aged 57 to 70 years. Body mass index (BMI), waist circumference, and body composition (bioelectrical impedance analysis) were measured at baseline and physical performance (Senior Fitness Test) ten years later. Linear regression analyses were adjusted for age, education, smoking, duration of the follow-up and physical activity. RESULTS Greater BMI, waist circumference, fat mass, and percent body fat were associated with poorer physical performance in both sexes (standardized regression coefficient [β] from -0.32 to -0.40, p < 0.001). Lean mass to BMI ratio was positively associated with later physical performance (β = 0.31 in men, β = 0.30 in women, p < 0.001). Fat-free mass index (lean mass/height2) in both sexes and lean mass in women were negatively associated with later physical performance. Lean mass residual after accounting for the effect of height and fat mass was not associated with physical performance. CONCLUSIONS Among older adults, higher measures of adiposity predicted poorer physical performance ten years later whereas lean mass was associated with physical performance in a counterintuitive manner. The results can be used when appraising usefulness of body composition indicators for definition of sarcopenic obesity.
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Affiliation(s)
| | - Mikaela B von Bonsdorff
- Folkhälsan Research Center, Helsinki, Finland; Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyvaskyla, Jyvaskyla, Finland
| | - Minna K Salonen
- Folkhälsan Research Center, Helsinki, Finland; Chronic Disease Prevention Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - Mika Simonen
- Centre of Excellence in Research on Intersubjectivity in Interaction, University of Helsinki, Helsinki, Finland
| | | | - Clive Osmond
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, United Kingdom
| | - Mia-Maria Perälä
- Folkhälsan Research Center, Helsinki, Finland; Chronic Disease Prevention Unit, National Institute for Health and Welfare, Helsinki, Finland
| | - Taina Rantanen
- Gerontology Research Center, Faculty of Sport and Health Sciences, University of Jyvaskyla, Jyvaskyla, Finland
| | - Eero Kajantie
- Chronic Disease Prevention Unit, National Institute for Health and Welfare, Helsinki, Finland; Children's Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland; PEDEGO Research Unit, MRC Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - Johan G Eriksson
- Folkhälsan Research Center, Helsinki, Finland; Chronic Disease Prevention Unit, National Institute for Health and Welfare, Helsinki, Finland; Department of General Practice and Primary Health Care, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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755
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Carbone F, Nulli Migliola E, Bonaventura A, Vecchié A, De Vuono S, Ricci MA, Vaudo G, Boni M, Dallegri F, Montecucco F, Lupattelli G. High serum levels of C-reactive protein (CRP) predict beneficial decrease of visceral fat in obese females after sleeve gastrectomy. Nutr Metab Cardiovasc Dis 2018; 28:494-500. [PMID: 29502925 DOI: 10.1016/j.numecd.2018.01.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/10/2018] [Accepted: 01/25/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND & AIMS Gender-related differences represent an emerging investigation field to better understand obesity heterogeneity and paradoxically associated cardiovascular (CV) risk. Here, we investigated if high-sensitivity C-reactive protein (hs-CRP) might differently affect adiposity and predict the clinical response to bariatric surgery in obese males and females. METHODS AND RESULTS In 110 morbidly obese patients undergoing laparoscopic sleeve gastrectomy, hs-CRP as well as anthropometric assessment of adiposity, completed by electric bioimpedance and ultrasonography quantification of visceral fat area (VFA), were measured before and one year after surgery. As compared to males, obese female showed less severe overweight and prevalent subcutaneous fat deposition, but higher circulating hs-CRP. In obese females, hs-CRP was associated with VFA at baseline, independently of body mass index (BMI) and visceral adiposity index (OR 1.022 [95% CI 1.001-1.044]; p = 0.039). Based on decreases and increases in hs-CRP levels after surgery, two distinct subgroups of females were identified. Post-surgery decreases in hs-CRP was predominantly observed in patients with higher baseline levels of hs-CRP and associated with greater reduction of weight, BMI, fat and lean mass, VFA and visceral to subcutaneous fat ratio. Finally, we observed that high baseline values of hs-CRP were able to predict VFA reduction one-year after surgery, independently of BMI and visceral adiposity index (VAI) loss (OR 1.031 [95% CI 1.009-1.053]; p = 0.005). CONCLUSION In obese females, hs-CRP levels might be a promising biomarker of visceral fat amount and dysfunction, in addition to predict the effectiveness of bariatric surgery in terms of loss of VFA one-year after surgery.
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Affiliation(s)
- F Carbone
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa School of Medicine, 6 viale Benedetto XV, 16132, Genoa, Italy.
| | - E Nulli Migliola
- Internal Medicine Department, "Santa Maria della Misericordia" Hospital, University of Perugia, Piazzale Menghini, Sant'Andrea delle Fratte, 06132, Perugia, Italy
| | - A Bonaventura
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa School of Medicine, 6 viale Benedetto XV, 16132, Genoa, Italy
| | - A Vecchié
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa School of Medicine, 6 viale Benedetto XV, 16132, Genoa, Italy
| | - S De Vuono
- Internal Medicine Department, "Santa Maria della Misericordia" Hospital, University of Perugia, Piazzale Menghini, Sant'Andrea delle Fratte, 06132, Perugia, Italy
| | - M A Ricci
- Internal Medicine Department, "Santa Maria della Misericordia" Hospital, University of Perugia, Piazzale Menghini, Sant'Andrea delle Fratte, 06132, Perugia, Italy
| | - G Vaudo
- Internal Medicine Department, "Santa Maria della Misericordia" Hospital, University of Perugia, Piazzale Menghini, Sant'Andrea delle Fratte, 06132, Perugia, Italy
| | - M Boni
- Surgery Department, San Giovanni Battista Hospital, Via Massimo Arcamone, 06034, Foligno, Italy
| | - F Dallegri
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa School of Medicine, 6 viale Benedetto XV, 16132, Genoa, Italy; Ospedale Policlinico San Martino, 10 Largo Benzi, 16132, Genoa, Italy
| | - F Montecucco
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa School of Medicine, 6 viale Benedetto XV, 16132, Genoa, Italy; Ospedale Policlinico San Martino, 10 Largo Benzi, 16132, Genoa, Italy; Centre of Excellence for Biomedical Research (CEBR), University of Genoa, 9 viale Benedetto XV, 16132, Genoa, Italy
| | - G Lupattelli
- Internal Medicine Department, "Santa Maria della Misericordia" Hospital, University of Perugia, Piazzale Menghini, Sant'Andrea delle Fratte, 06132, Perugia, Italy
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756
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Villarroya F, Cereijo R, Villarroya J, Gavaldà-Navarro A, Giralt M. Toward an Understanding of How Immune Cells Control Brown and Beige Adipobiology. Cell Metab 2018; 27:954-961. [PMID: 29719233 DOI: 10.1016/j.cmet.2018.04.006] [Citation(s) in RCA: 139] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/13/2018] [Accepted: 04/03/2018] [Indexed: 12/19/2022]
Abstract
Immune cells were recently found to have an unexpected involvement in controlling the thermogenic activity of brown and beige adipose tissue. Here, we review how macrophages, eosinophils, type 2 innate lymphoid cells, and T lymphocytes are linked to this process. In particular, the recruitment of alternatively activated macrophages and eosinophils is associated with brown fat activation and white fat browning. Conversely, pro-inflammatory immune cell recruitment represses the thermogenic activity of brown and beige adipose tissues via cytokines that inhibit noradrenergic signaling. Macrophages also influence the noradrenergic tone by degrading norepinephrine locally and by inhibiting sympathetic innervation over time.
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Affiliation(s)
- Francesc Villarroya
- Departament de Bioquímica i Biomedicina Molecular, Universitat de Barcelona, Barcelona, Catalonia, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Barcelona, Catalonia, Spain.
| | - Rubén Cereijo
- Departament de Bioquímica i Biomedicina Molecular, Universitat de Barcelona, Barcelona, Catalonia, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Barcelona, Catalonia, Spain
| | - Joan Villarroya
- Departament de Bioquímica i Biomedicina Molecular, Universitat de Barcelona, Barcelona, Catalonia, Spain; Hospital de la Santa Creu i Sant Pau, Barcelona, Catalonia, Spain
| | - Aleix Gavaldà-Navarro
- Departament de Bioquímica i Biomedicina Molecular, Universitat de Barcelona, Barcelona, Catalonia, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Barcelona, Catalonia, Spain
| | - Marta Giralt
- Departament de Bioquímica i Biomedicina Molecular, Universitat de Barcelona, Barcelona, Catalonia, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Barcelona, Catalonia, Spain
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757
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Peterson KR, Cottam MA, Kennedy AJ, Hasty AH. Macrophage-Targeted Therapeutics for Metabolic Disease. Trends Pharmacol Sci 2018; 39:536-546. [PMID: 29628274 DOI: 10.1016/j.tips.2018.03.001] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/01/2018] [Accepted: 03/08/2018] [Indexed: 01/22/2023]
Abstract
Macrophages are cells of the innate immune system that are resident in all tissues, including metabolic organs such as the liver and adipose tissue (AT). Because of their phenotypic flexibility, they play beneficial roles in tissue homeostasis, but they also contribute to the progression of metabolic disease. Thus, they are ideal therapeutic targets for diseases such as insulin resistance (IR), nonalcoholic fatty liver disease (NAFLD), and atherosclerosis. Recently, discoveries in the area of drug delivery have facilitated phenotype-specific targeting of macrophages. In this review we discuss advances in potential therapeutics for metabolic diseases via macrophage-specific delivery. We highlight micro- and nanoparticles, liposomes, and oligopeptide complexes, and how they can be used to alter macrophage phenotype for a more metabolically favorable tissue environment.
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Affiliation(s)
- Kristin R Peterson
- Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, TN, USA; These authors contributed equally to this work
| | - Matthew A Cottam
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, USA; These authors contributed equally to this work
| | - Arion J Kennedy
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Alyssa H Hasty
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN, USA; VA Tennessee Valley Healthcare System, Nashville, TN 37212, USA.
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758
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Abstract
Ghrelin, a gastric-derived acylated peptide, regulates energy homeostasis by transmitting information about peripheral nutritional status to the brain, and is essential for protecting organisms against famine. Ghrelin operates brain circuits to regulate homeostatic and hedonic feeding. Recent research advances have shed new light on ghrelin's multifaceted roles in cellular homeostasis, which could maintain the internal environment and overcome metaflammation in metabolic organs. Here, we highlight our current understanding of the regulatory mechanisms of the ghrelin system in energy metabolism and cellular homeostasis and its clinical trials. Future studies of ghrelin will further elucidate how the stomach regulates systemic homeostasis.
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Affiliation(s)
- Shigehisa Yanagi
- Divisions of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Kiyotake, Miyazaki 889-1692, Japan
| | - Takahiro Sato
- Molecular Genetics, Institute of Life Science, Kurume University, Kurume 839-0864, Japan
| | - Kenji Kangawa
- Department of Biochemistry, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka 565-8565, Japan
| | - Masamitsu Nakazato
- Divisions of Neurology, Respirology, Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Miyazaki, Kiyotake, Miyazaki 889-1692, Japan; AMED-CREST, Japan Agency for Medical Research and Development, Chiyoda-ku, Tokyo 100-0004, Japan.
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759
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Milner JJ, Goldrath AW. Transcriptional programming of tissue-resident memory CD8 + T cells. Curr Opin Immunol 2018; 51:162-169. [PMID: 29621697 PMCID: PMC5943164 DOI: 10.1016/j.coi.2018.03.017] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 03/18/2018] [Indexed: 01/28/2023]
Abstract
Tissue-resident memory CD8+ T cells (TRM) are localized in non-lymphoid tissues throughout the body where they mediate long-lived protective immunity at common sites of pathogen exposure. As the signals controlling TRM differentiation are uncovered, it is becoming apparent that the dynamic activities of numerous transcription factors are intricately involved in TRM formation. Here, we highlight known transcriptional regulators of TRM differentiation and discuss how understanding the transcriptional programming of CD8+ T cell residency in non-lymphoid tissues can be leveraged to prevent or treat disease.
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Affiliation(s)
- J Justin Milner
- Division of Biological Sciences, University of California, San Diego , La Jolla, CA, USA
| | - Ananda W Goldrath
- Division of Biological Sciences, University of California, San Diego , La Jolla, CA, USA.
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760
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Rakotoarivelo V, Lacraz G, Mayhue M, Brown C, Rottembourg D, Fradette J, Ilangumaran S, Menendez A, Langlois MF, Ramanathan S. Inflammatory Cytokine Profiles in Visceral and Subcutaneous Adipose Tissues of Obese Patients Undergoing Bariatric Surgery Reveal Lack of Correlation With Obesity or Diabetes. EBioMedicine 2018; 30:237-247. [PMID: 29548899 PMCID: PMC5952229 DOI: 10.1016/j.ebiom.2018.03.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/28/2018] [Accepted: 03/06/2018] [Indexed: 02/07/2023] Open
Abstract
Population studies have linked insulin resistance to systemic low-grade chronic inflammation and have reported elevated levels of inflammatory cytokines such as TNFα, IL-1β and IL-6, individually or in certain combinations, in adipose tissues or in the serum. We undertook this comprehensive study to simultaneously evaluate the expression of several pro-inflammatory and anti-inflammatory cytokines in serum and in the visceral and subcutaneous adipose tissues from obese patients undergoing bariatric surgery. We observed that several inflammatory cytokines implicated in obesity-associated inflammation showed no significant difference in protein or gene expression between obese patients with or without diabetes and control groups. IL1B gene expression was significantly elevated in the visceral adipose tissues of obese patients, but did not correlate with their diabetes status. Despite the significant increase in IL1B expression in the obese group, a significant proportion of obese patients did not express TNFA, IL1B or IL6 in visceral adipose tissues. Certain inflammatory cytokines showed correlation with the chemokine CCL2 and VEGF-A in visceral adipose tissues. Our findings suggest that the inflammatory cytokine profile in metabolic syndrome is more complex than what is currently perceived and that chronic inflammation in obese patients likely results from incremental contribution from different cytokines and possibly other inflammatory mediators from within and outside the adipose tissues. It is possible that this obesity associated chronic inflammation is not predicted by a single mediator, but rather includes a large spectrum of possible profiles. Visceral and subcutaneous adipose tissues do not express similar pattern of cytokines. VAT and SAT tissues from 30% of the obese patients do not express TNFA, IL6 or IL1B. Protein levels and gene expression do not necessarily correlate in VAT or SAT. The expression pattern of inflammatory mediators may present a larger spectrum than predicted from animal models.
Obesity, type 2 diabetes and cardiometabolic diseases are associated with a low-grade chronic inflammation. Various inflammatory mediators have been shown to mediate this inflammation. In this study we analyzed the expression of many of these inflammatory mediators in the visceral and subcutaneous adipose tissues obtained from patients undergoing bariatric surgery. Our results suggest that the profile of inflammatory mediators expressed in adipose tissue is diverse and varies from one patient to another.
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Affiliation(s)
- Volatiana Rakotoarivelo
- Department of Pediatrics, Division of Immunology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Gregory Lacraz
- Department of Pediatrics, Division of Immunology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Marian Mayhue
- Department of Pediatrics, Division of Immunology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Christine Brown
- Centre de Recherche, Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), Sherbrooke, QC, Canada
| | - Diane Rottembourg
- Department of Pediatrics, Division of Immunology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada; Department of Medicine, Division of Endocrinology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada; Centre de Recherche, Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), Sherbrooke, QC, Canada
| | - Julie Fradette
- Department of Surgery, Université laval, CRCHU de Québec-Université Laval, Québec, QC, Canada
| | - Subburaj Ilangumaran
- Department of Pediatrics, Division of Immunology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada; Centre de Recherche, Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), Sherbrooke, QC, Canada
| | - Alfredo Menendez
- Department of Microbiology and Infectious diseases, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada; Centre de Recherche, Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), Sherbrooke, QC, Canada
| | - Marie-France Langlois
- Department of Medicine, Division of Endocrinology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada; Centre de Recherche, Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), Sherbrooke, QC, Canada
| | - Sheela Ramanathan
- Department of Pediatrics, Division of Immunology, Faculty of Medicine and Heath Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada; Centre de Recherche, Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), Sherbrooke, QC, Canada.
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761
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Muir LA, Kiridena S, Griffin C, DelProposto JB, Geletka L, Martinez-Santibañez G, Zamarron BF, Lucas H, Singer K, O' Rourke RW, Lumeng CN. Frontline Science: Rapid adipose tissue expansion triggers unique proliferation and lipid accumulation profiles in adipose tissue macrophages. J Leukoc Biol 2018; 103:615-628. [PMID: 29493813 DOI: 10.1002/jlb.3hi1017-422r] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/04/2018] [Accepted: 01/10/2018] [Indexed: 12/22/2022] Open
Abstract
Obesity-related changes in adipose tissue leukocytes, in particular adipose tissue macrophages (ATMs) and dendritic cells (ATDCs), are implicated in metabolic inflammation, insulin resistance, and altered regulation of adipocyte function. We evaluated stromal cell and white adipose tissue (WAT) expansion dynamics with high fat diet (HFD) feeding for 3-56 days, quantifying ATMs, ATDCs, endothelial cells (ECs), and preadipocytes (PAs) in visceral epididymal WAT and subcutaneous inguinal WAT. To better understand mechanisms of the early response to obesity, we evaluated ATM proliferation and lipid accumulation. ATMs, ATDCs, and ECs increased with rapid WAT expansion, with ATMs derived primarily from a CCR2-independent resident population. WAT expansion stimulated proliferation in resident ATMs and ECs, but not CD11c+ ATMs or ATDCs. ATM proliferation was unperturbed in Csf2- and Rag1-deficient mice with WAT expansion. Additionally, ATM apoptosis decreased with WAT expansion, and proliferation and apoptosis reverted to baseline with weight loss. Adipocytes reached maximal hypertrophy at 28 days of HFD, coinciding with a plateau in resident ATM accumulation and the appearance of lipid-laden CD11c+ ATMs in visceral epididymal WAT. ATM increases were proportional to tissue expansion and adipocyte hypertrophy, supporting adipocyte-mediated regulation of resident ATMs. The appearance of lipid-laden CD11c+ ATMs at peak adipocyte size supports a role in responding to ectopic lipid accumulation within adipose tissue. In contrast, ATDCs increase independently of proliferation and may be derived from circulating precursors. These changes precede and establish the setting in which large-scale adipose tissue infiltration of CD11c+ ATMs, inflammation, and adipose tissue dysfunction contributes to insulin resistance.
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Affiliation(s)
- Lindsey A Muir
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Samadhi Kiridena
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, Michigan, USA
| | - Cameron Griffin
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Jennifer B DelProposto
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Lynn Geletka
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Gabriel Martinez-Santibañez
- Cellular and Molecular Biology Graduate Program, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Brian F Zamarron
- Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Hannah Lucas
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, Michigan, USA
| | - Kanakadurga Singer
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Robert W O' Rourke
- Department of Surgery, University of Michigan Medical School, Ann Arbor, Michigan, USA.,Department of Surgery, Ann Arbor Veterans Administration Hospital, Ann Arbor, Michigan, USA
| | - Carey N Lumeng
- Department of Pediatrics and Communicable Diseases, University of Michigan Medical School, Ann Arbor, Michigan, USA.,Cellular and Molecular Biology Graduate Program, University of Michigan Medical School, Ann Arbor, Michigan, USA.,Graduate Program in Immunology, University of Michigan Medical School, Ann Arbor, Michigan, USA
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762
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Langefeld CD, Comeau ME, Sharma NK, Bowden DW, Freedman BI, Das SK. Transcriptional Regulatory Mechanisms in Adipose and Muscle Tissue Associated with Composite Glucometabolic Phenotypes. Obesity (Silver Spring) 2018; 26:559-569. [PMID: 29377571 PMCID: PMC5821540 DOI: 10.1002/oby.22113] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 10/27/2017] [Accepted: 12/08/2017] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Tissue-specific gene expression is associated with individual metabolic measures. However, these measures may not reflect the true but latent underlying biological phenotype. This study reports gene expression associations with multidimensional glucometabolic characterizations of obesity, glucose homeostasis, and lipid traits. METHODS Factor analysis was computed by using orthogonal rotation to construct composite phenotypes (CPs) from 23 traits in 256 African Americans without diabetes. Genome-wide transcript expression data from adipose and muscle were tested for association with CPs, and expression quantitative trait loci (eQTLs) were identified by associations between cis-acting single-nucleotide polymorphisms (SNPs) and gene expression. RESULTS The factor analysis identified six CPs. CPs 1 through 6 individually explained 34%, 12%, 9%, 8%, 6%, and 5% of the variation in 23 glucometabolic traits studied. There were 3,994 and 929 CP-associated transcripts identified in adipose and muscle tissue, respectively; CP2 had the largest number of associated transcripts. Pathway analysis identified multiple canonical pathways from the CP-associated transcripts. In adipose and muscle, significant cis-eQTLs were identified for 558 and 164 CP-associated transcripts (q-value < 0.01), respectively. CONCLUSIONS Adipose and muscle transcripts comprehensively define pathways involved in regulating glucometabolic disorders. Cis-eQTLs for CP-associated genes may act as primary causal determinants of glucometabolic phenotypes by regulating transcription of key genes.
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Affiliation(s)
- Carl D. Langefeld
- Department of Biostatistical Sciences, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC 27157
| | - Mary E. Comeau
- Department of Biostatistical Sciences, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC 27157
| | - Neeraj K. Sharma
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157
| | - Donald W. Bowden
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, NC 27157
| | - Barry I. Freedman
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157
| | - Swapan K. Das
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157
- Corresponding author and person to whom reprint requests should be addressed: Swapan K. Das, Ph.D., Section on Endocrinology and Metabolism, Department of Internal Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157, , Telephone: 336-713-6057; Fax: 336-713-7200
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763
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Yang M, Su L, Tao Q, Zhang C, Wu Y, Liu J. Depletion of Regulatory T Cells in Visceral Adipose Tissues Contributes to Insulin Resistance in Hashimoto's Thyroiditis. Front Physiol 2018. [PMID: 29541033 PMCID: PMC5835527 DOI: 10.3389/fphys.2018.00136] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Hashimoto's Thyroiditis (HT) is a common organ-specific autoimmune disorder associated with a high incidence, and insulin resistance is highly related to autoimmune. Here, we examined the insulin sensitivity in HT patients and found decreased insulin sensitivity occurred in HT patients. To explore the relationship between impaired insulin sensitivity and immune status, we established HT model mice which showed similar pathological features and immune features to HT patients. In HT model mice, reinfusion of regulatory T cells (Tregs) from peripheral blood of normal mice could improve insulin sensitivity and decrease the inflammation. Anti-CD25 antibodies blocked beneficial effects from reinfusion of Tregs, but delayed administration of anti-CD25 antibodies could not abolished the effect from Tregs. Delayed administration of anti-CD25 antibodies abolished exogenous Tregs in peripheral blood, but there were increased exogenous Tregs located to visceral adipose tissues (VATs) which modulated the expression of cytokines in VATs. These findings suggest that insulin resistance exists in HT patients and it associates with the decreased Tregs and increased inflammation in the VATs.
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Affiliation(s)
- Min Yang
- Department of Endocrinology, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Li Su
- Testing and Analysis Center, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Qin Tao
- Department of Endocrinology, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Chenxi Zhang
- Testing and Analysis Center, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Yueyue Wu
- Department of Endocrinology, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Jun Liu
- Department of Endocrinology, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
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764
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Trim W, Turner JE, Thompson D. Parallels in Immunometabolic Adipose Tissue Dysfunction with Ageing and Obesity. Front Immunol 2018; 9:169. [PMID: 29479350 PMCID: PMC5811473 DOI: 10.3389/fimmu.2018.00169] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/19/2018] [Indexed: 12/12/2022] Open
Abstract
Ageing, like obesity, is often associated with alterations in metabolic and inflammatory processes resulting in morbidity from diseases characterised by poor metabolic control, insulin insensitivity, and inflammation. Ageing populations also exhibit a decline in immune competence referred to as immunosenescence, which contributes to, or might be driven by chronic, low-grade inflammation termed "inflammageing". In recent years, animal and human studies have started to uncover a role for immune cells within the stromal fraction of adipose tissue in driving the health complications that come with obesity, but relatively little work has been conducted in the context of immunometabolic adipose function in ageing. It is now clear that aberrant immune function within adipose tissue in obesity-including an accumulation of pro-inflammatory immune cell populations-plays a major role in the development of systemic chronic, low-grade inflammation, and limiting the function of adipocytes leading to an impaired fat handling capacity. As a consequence, these changes increase the chance of multiorgan dysfunction and disease onset. Considering the important role of the immune system in obesity-associated metabolic and inflammatory diseases, it is critically important to further understand the interplay between immunological processes and adipose tissue function, establishing whether this interaction contributes to age-associated immunometabolic dysfunction and inflammation. Therefore, the aim of this article is to summarise how the interaction between adipose tissue and the immune system changes with ageing, likely contributing to the age-associated increase in inflammatory activity and loss of metabolic control. To understand the potential mechanisms involved, parallels will be drawn to the current knowledge derived from investigations in obesity. We also highlight gaps in research and propose potential future directions based on the current evidence.
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Affiliation(s)
- William Trim
- Department for Health, University of Bath, Bath, United Kingdom
| | - James E Turner
- Department for Health, University of Bath, Bath, United Kingdom
| | - Dylan Thompson
- Department for Health, University of Bath, Bath, United Kingdom
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765
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Zhao P, Wong KI, Sun X, Reilly SM, Uhm M, Liao Z, Skorobogatko Y, Saltiel AR. TBK1 at the Crossroads of Inflammation and Energy Homeostasis in Adipose Tissue. Cell 2018; 172:731-743.e12. [PMID: 29425491 PMCID: PMC5808582 DOI: 10.1016/j.cell.2018.01.007] [Citation(s) in RCA: 178] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 11/17/2017] [Accepted: 01/04/2018] [Indexed: 12/22/2022]
Abstract
The noncanonical IKK family member TANK-binding kinase 1 (TBK1) is activated by pro-inflammatory cytokines, but its role in controlling metabolism remains unclear. Here, we report that the kinase uniquely controls energy metabolism. Tbk1 expression is increased in adipocytes of HFD-fed mice. Adipocyte-specific TBK1 knockout (ATKO) attenuates HFD-induced obesity by increasing energy expenditure; further studies show that TBK1 directly inhibits AMPK to repress respiration and increase energy storage. Conversely, activation of AMPK under catabolic conditions can increase TBK1 activity through phosphorylation, mediated by AMPK's downstream target ULK1. Surprisingly, ATKO also exaggerates adipose tissue inflammation and insulin resistance. TBK1 suppresses inflammation by phosphorylating and inducing the degradation of the IKK kinase NIK, thus attenuating NF-κB activity. Moreover, TBK1 mediates the negative impact of AMPK activity on NF-κB activation. These data implicate a unique role for TBK1 in mediating bidirectional crosstalk between energy sensing and inflammatory signaling pathways in both over- and undernutrition.
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Affiliation(s)
- Peng Zhao
- Division of Metabolism and Endocrinology, Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Kai In Wong
- Division of Metabolism and Endocrinology, Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA
| | - Xiaoli Sun
- Division of Metabolism and Endocrinology, Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA
| | - Shannon M Reilly
- Division of Metabolism and Endocrinology, Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Maeran Uhm
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Zhongji Liao
- Division of Metabolism and Endocrinology, Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA
| | - Yuliya Skorobogatko
- Division of Metabolism and Endocrinology, Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Alan R Saltiel
- Division of Metabolism and Endocrinology, Department of Medicine, University of California-San Diego, La Jolla, CA 92093, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA.
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766
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Rattarasarn C. Dysregulated lipid storage and its relationship with insulin resistance and cardiovascular risk factors in non-obese Asian patients with type 2 diabetes. Adipocyte 2018; 7:71-80. [PMID: 29411678 DOI: 10.1080/21623945.2018.1429784] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The prevalence of non-obese type 2 diabetes in Asians is up to 50%. This review aims to summarize the role of regional fat in the development of insulin resistance and cardiovascular risk in non-obese Asian type 2 diabetes as well as the role of intra-pancreatic fat and β-cell dysfunction. The body fat content of non-obese Asian type 2 diabetic patients is not different from that of non-diabetic subjects but the proportion of intra-abdominal and intra-hepatic fat are greater. Visceral fat contributes to insulin resistance and cardiovascular risk in non-obese Asian type 2 diabetes. Intra-hepatic fat and the hypertrophic abdominal subcutaneous adipocytes are associated with insulin resistance and cardiovascular risk in non-obese, non-diabetic Asian subjects. It may be true in non-obese Asian type 2 diabetic patients. The role of intra-myocellular lipid and insulin resistance is uncertain. Intra-pancreatic fat may not be involved in β-cell dysfunction in non-obese Asian type 2 diabetes.
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Affiliation(s)
- Chatchalit Rattarasarn
- Division of Endocrinology & Metabolism, Department of Medicine, Ramathibodi hospital, Mahidol university, Bangkok, Thailand
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767
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Guerra DAP, Paiva AE, Sena IFG, Azevedo PO, Batista ML, Mintz A, Birbrair A. Adipocytes role in the bone marrow niche. Cytometry A 2018; 93:167-171. [PMID: 29236351 PMCID: PMC6067923 DOI: 10.1002/cyto.a.23301] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 11/21/2017] [Accepted: 11/28/2017] [Indexed: 12/19/2022]
Abstract
Adipocyte infiltration in the bone marrow follows chemotherapy or irradiation. Previous studies indicate that bone marrow fat cells inhibit hematopoietic stem cell function. Recently, Zhou et al. (2017) using state-of-the-art techniques, including sophisticated Cre/loxP technologies, confocal microscopy, in vivo lineage-tracing, flow cytometry, and bone marrow transplantation, reveal that adipocytes promote hematopoietic recovery after irradiation. This study challenges the current view of adipocytes as negative regulators of the hematopoietic stem cells niche, and reopens the discussion about adipocytes' roles in the bone marrow. Strikingly, genetic deletion of stem cell factor specifically from adipocytes leads to deficiency in hematopoietic stem cells, and reduces animal survival after myeloablation, The emerging knowledge from this research will be important for the treatment of multiple hematologic disorders. © 2017 International Society for Advancement of Cytometry.
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Affiliation(s)
- Daniel A. P. Guerra
- Department of Pathology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ana E. Paiva
- Department of Pathology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Isadora F. G. Sena
- Department of Pathology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Patrick O. Azevedo
- Department of Pathology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Miguel Luiz Batista
- Laboratory of Adipose Tissue Biology, University of Mogi das Cruzes, Mogi das Cruzes, SP, Brazil
| | - Akiva Mintz
- Department of Radiology, Columbia University Medical Center, New York, NY, USA
| | - Alexander Birbrair
- Department of Pathology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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768
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Pan MH, Wu JC, Ho CT, Lai CS. Antiobesity molecular mechanisms of action: Resveratrol and pterostilbene. Biofactors 2018; 44:50-60. [PMID: 29315906 DOI: 10.1002/biof.1409] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/29/2017] [Accepted: 12/10/2017] [Indexed: 12/25/2022]
Abstract
Obesity is a current global epidemic that has led to a marked increase in metabolic diseases. However, its treatment remains a challenge. Obesity is a multifactorial disease, which involves the dysfunction of neuropeptides, hormones, and inflammatory adipokines from the brain, gut, and adipose tissue. An understanding of the mechanisms and signal interactions in the crosstalk between organs and tissue in the coordination of whole-body energy metabolism would be helpful to provide therapeutic and putative approaches to the treatment and prevention of obesity and related complications. Resveratrol and pterostilbene are well-known stilbenes that provide various potential benefits to human health. In particular, their potential anti-obesity effects have been proven in numerous cell culture and animal studies. Both compounds act to regulate energy intake, adipocyte life cycle and function, white adipose tissue (WAT) inflammation, energy expenditure, and gut microbiota by targeting multiple molecules and signaling pathways as an intervention for obesity. Although the efficacy of both compounds in humans requires further investigation with respect to their oral bioavailability, promising scientific findings have highlighted their potential as candidates for the treatment of obesity and the improvement of obesity-related metabolic diseases. © 2018 BioFactors, 44(1):50-60, 2018.
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Affiliation(s)
- Min-Hsiung Pan
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 40402, Taiwan
- Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan
- Institute of Food Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Jia-Ching Wu
- Department of Environmental and Occupational Health, National Cheng Kung University Medical College, Tainan, Taiwan
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University, New Brunswick, NJ, USA
| | - Ching-Shu Lai
- Department of Seafood Science, National Kaohsiung Marine University, Kaohsiung, Taiwan
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769
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770
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Liu Z, Gan L, Zhang T, Ren Q, Sun C. Melatonin alleviates adipose inflammation through elevating α-ketoglutarate and diverting adipose-derived exosomes to macrophages in mice. J Pineal Res 2018; 64. [PMID: 29149454 DOI: 10.1111/jpi.12455] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/06/2017] [Indexed: 12/21/2022]
Abstract
Obesity is associated with macrophage infiltration and metabolic inflammation, both of which promote metabolic disease progression. Melatonin is reported to possess anti-inflammatory properties by inhibiting inflammatory response of adipocytes and macrophages activation. However, the effects of melatonin on the communication between adipocytes and macrophages during adipose inflammation remain elusive. Here, we demonstrated melatonin alleviated inflammation and elevated α-ketoglutarate (αKG) level in adipose tissue of obese mice. Mitochondrial isocitrate dehydrogenase 2 (Idh2) mRNA level was also elevated by melatonin in adipocytes leading to increase αKG level. Further analysis revealed αKG was the target for melatonin inhibition of adipose inflammation. Moreover, sirtuin 1 (Sirt1) physically interacted with IDH2 and formed a complex to increase the circadian amplitude of Idh2 and αKG content in melatonin-inhibited adipose inflammation. Notably, melatonin promoted exosomes secretion from adipocyte and increased adipose-derived exosomal αKG level. Our results also confirmed that melatonin alleviated adipocyte inflammation and increased ratio of M2 to M1 macrophages by transporting of exosomal αKG to macrophages and promoting TET-mediated DNA demethylation. Furthermore, exosomal αKG attenuated signal transducers and activators of transduction-3 (STAT3)/NF-κB signal by its receptor oxoglutarate receptor 1 (OXGR1) in adipocytes. Melatonin also attenuated adipose inflammation and deceased macrophage number in chronic jet-lag mice. In summary, our results demonstrate melatonin alleviates metabolic inflammation by increasing cellular and exosomal αKG level in adipose tissue. Our data reveal a novel function of melatonin on adipocytes and macrophages communication, suggesting a new potential therapy for melatonin to prevent and treat obesity caused systemic inflammatory disease.
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Affiliation(s)
- Zhenjiang Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Lu Gan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Tiantian Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Qian Ren
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Chao Sun
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
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771
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Episodic Frequency of Energy-Dense Food Consumption in Women with Excessive Adiposity. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5910174. [PMID: 29270432 PMCID: PMC5705864 DOI: 10.1155/2017/5910174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/23/2017] [Accepted: 10/18/2017] [Indexed: 11/17/2022]
Abstract
Each episode of fatty or sugary food consumption contributes to the pathophysiological alterations found in obesity. The present study estimated episodic frequency of energy-dense food (EDF) consumption in 348 adult women with excessive adiposity. Participants reported in open questions their habitual exercise and EDF consumption per week. Body fat percentage was measured using electric impedance analysis. Variations in EDF consumption by age, fat mass, and exercise levels were examined by factorial analysis of variance. The frequency of consumption of EDF was on average 12 times per week and it did not vary significantly across subgroups. It is argued that, to reduce obesity and its comorbidities, lowering a high episodic frequency of EDF consumption could be recommended in clinical settings.
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772
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Houfflyn S, Matthys C, Soubry A. Male Obesity: Epigenetic Origin and Effects in Sperm and Offspring. CURRENT MOLECULAR BIOLOGY REPORTS 2017; 3:288-296. [PMID: 29387521 PMCID: PMC5768668 DOI: 10.1007/s40610-017-0083-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
PURPOSE OF REVIEW The prevalence of obesity has increased substantially in the current generations of Western countries, and the burden of obesity-related complications has been growing steadily. In men, obesity is not only a major risk factor for serious chronic diseases, concern is growing that the reproductive capacity, and more particularly, their offspring's health may be affected. Obesity-related impaired spermatogenesis is associated with a decrease in microscopic and molecular sperm characteristics and pregnancy success. We hypothesize that epigenetics is an important mediator explaining interactions between an obesogenic environment and sperm/offspring outcomes. RECENT FINDINGS Recent studies have explored inter- and transgenerational epigenetic effects in sperm cells and in offspring. Father-to-child effects have been reported in relation to preconceptional nutritional and life-style related factors. SUMMARY Here, we summarize the current understanding about obesity and molecular or epigenetic underlying mechanisms in sperm. We identify the obesogenic environment of the father before conception as a potential origin of health or disease in the offspring and include it as part of a new concept, the Paternal Origins of Health and Disease (POHaD).
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Affiliation(s)
- Sam Houfflyn
- Epidemiology Research Unit, Department of Public Health and Primary Care, University of Leuven, 3000 Leuven, Belgium
| | - Christophe Matthys
- Clinical and Experimental Endocrinology, Department of Chronic Diseases, Metabolism, and Ageing, KU Leuven University, Leuven, Belgium
| | - Adelheid Soubry
- Epidemiology Research Unit, Department of Public Health and Primary Care, University of Leuven, 3000 Leuven, Belgium
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773
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Moreno-Navarrete JM, Fernández-Real JM. The complement system is dysfunctional in metabolic disease: Evidences in plasma and adipose tissue from obese and insulin resistant subjects. Semin Cell Dev Biol 2017; 85:164-172. [PMID: 29107169 DOI: 10.1016/j.semcdb.2017.10.025] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/20/2017] [Accepted: 10/24/2017] [Indexed: 02/03/2023]
Abstract
The relationship among chronic low-grade inflammation, insulin resistance and other obesity-associated metabolic disturbances is increasingly recognized. The possible mechanisms that trigger these immunologic alterations remain to be fully understood. The complement system is a crucial element of immune defense system, being important in the activation of innate and adaptative immune response, promoting the clearance of apoptotic and damaged endogenous cells and participating in processes of tissue development, degeneration, and regeneration. Circulating components of the complement system appear to be dysregulated in obesity-associated metabolic disturbances. The activation of the complement system is also evident in adipose tissue from obese subjects, in association with subclinical inflammation and alterations in glucose metabolism. The possible contribution of some components of the complement system in the development of insulin resistance and obesity-associated metabolic disturbances, and the possible role of complement system in adipose tissue physiology is reviewed here. The modulation of the complement system could constitute a potential target in the pathophysiology and therapy of obesity and associated metabolic disease.
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Affiliation(s)
- José María Moreno-Navarrete
- Department of Diabetes, Endocrinology and Nutrition, Institut d'Investigació Biomèdica de Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto de Salud Carlos III (ISCIII), Girona, Spain.
| | - José Manuel Fernández-Real
- Department of Diabetes, Endocrinology and Nutrition, Institut d'Investigació Biomèdica de Girona (IdIBGi), CIBEROBN (CB06/03/010) and Instituto de Salud Carlos III (ISCIII), Girona, Spain.
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