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Cuciureanu M, Caratașu CC, Gabrielian L, Frăsinariu OE, Checheriță LE, Trandafir LM, Stanciu GD, Szilagyi A, Pogonea I, Bordeianu G, Soroceanu RP, Andrițoiu CV, Anghel MM, Munteanu D, Cernescu IT, Tamba BI. 360-Degree Perspectives on Obesity. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1119. [PMID: 37374323 DOI: 10.3390/medicina59061119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 05/29/2023] [Accepted: 06/02/2023] [Indexed: 06/29/2023]
Abstract
Alarming statistics show that the number of people affected by excessive weight has surpassed 2 billion, representing approximately 30% of the world's population. The aim of this review is to provide a comprehensive overview of one of the most serious public health problems, considering that obesity requires an integrative approach that takes into account its complex etiology, including genetic, environmental, and lifestyle factors. Only an understanding of the connections between the many contributors to obesity and the synergy between treatment interventions can ensure satisfactory outcomes in reducing obesity. Mechanisms such as oxidative stress, chronic inflammation, and dysbiosis play a crucial role in the pathogenesis of obesity and its associated complications. Compounding factors such as the deleterious effects of stress, the novel challenge posed by the obesogenic digital (food) environment, and the stigma associated with obesity should not be overlooked. Preclinical research in animal models has been instrumental in elucidating these mechanisms, and translation into clinical practice has provided promising therapeutic options, including epigenetic approaches, pharmacotherapy, and bariatric surgery. However, more studies are necessary to discover new compounds that target key metabolic pathways, innovative ways to deliver the drugs, the optimal combinations of lifestyle interventions with allopathic treatments, and, last but not least, emerging biological markers for effective monitoring. With each passing day, the obesity crisis tightens its grip, threatening not only individual lives but also burdening healthcare systems and societies at large. It is high time we took action as we confront the urgent imperative to address this escalating global health challenge head-on.
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Affiliation(s)
- Magdalena Cuciureanu
- Department of Pharmacology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Cătălin-Cezar Caratașu
- Department of Pharmacology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Levon Gabrielian
- Department of Anatomy and Pathology, The University of Adelaide, Adelaide 5000, Australia
| | - Otilia Elena Frăsinariu
- Department of Mother and Child, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Laura Elisabeta Checheriță
- 2nd Dental Medicine Department, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Laura Mihaela Trandafir
- Department of Mother and Child, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Gabriela Dumitrița Stanciu
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Andrei Szilagyi
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Ina Pogonea
- Department of Pharmacology and Clinical Pharmacology, "Nicolae Testemiţanu" State University of Medicine and Pharmacy, 2004 Chisinau, Moldova
| | - Gabriela Bordeianu
- Department of Biochemistry, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Radu Petru Soroceanu
- Department of Surgery, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Călin Vasile Andrițoiu
- Specialization of Nutrition and Dietetics, "Vasile Goldis" Western University of Arad, 310025 Arad, Romania
| | - Maria Mihalache Anghel
- Department of Pharmacology and Clinical Pharmacology, "Nicolae Testemiţanu" State University of Medicine and Pharmacy, 2004 Chisinau, Moldova
| | - Diana Munteanu
- Institute of Mother and Child, "Nicolae Testemiţanu" State University of Medicine and Pharmacy, 2062 Chisinau, Moldova
| | - Irina Teodora Cernescu
- Department of Pharmacology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Bogdan Ionel Tamba
- Department of Pharmacology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
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Casimiro I, Stull ND, Tersey SA, Mirmira RG. Phenotypic sexual dimorphism in response to dietary fat manipulation in C57BL/6J mice. J Diabetes Complications 2021; 35:107795. [PMID: 33308894 PMCID: PMC7856196 DOI: 10.1016/j.jdiacomp.2020.107795] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/17/2020] [Accepted: 11/07/2020] [Indexed: 01/23/2023]
Abstract
BACKGROUND Obesity and the metabolic syndrome are increasingly prevalent in society and their complications and response to treatment exhibit sexual dimorphism. Mouse models of high fat diet-induced obesity are commonly used for both mechanistic and therapeutic studies of metabolic disease and diabetes. However, the inclusion of female mammals in obesity research has not been a common practice, and has resulted in a paucity of data regarding the effect of sex on metabolic parameters and its applicability to humans. METHODS Here we analyzed male and female C57BL/6 J mice beginning at 4 weeks of age that were placed on a low-fat diet (LFD, 10% calories from fat), a Western Diet (WD, 45% calories from fat), or a high fat diet (HFD, 60% calories from fat). Assessments of body composition, glucose homeostasis, insulin production, and energy metabolism, as well as histological analyses of pancreata were performed. RESULTS Both male and female C57BL/6 J mice had similar increases in total percent body weight gain with both WD and HFD compared to LFD, however, male mice gained weight earlier upon HFD or WD feeding compared to female mice. Male mice maintained their caloric food intake while reducing their locomotor activity with either WD or HFD compared to LFD, whereas female mice increased their caloric food intake with WD feeding. Locomotor activity of female mice did not significantly change upon WD or HFD feeding, yet female mice exhibited increased energy expenditure compared to WD or HFD fed male mice. Glucose tolerance tests performed at 4, 12 and 20 weeks of dietary intervention revealed impaired glucose tolerance that was worse in male mice compared to females. Furthermore, male mice exhibited an increase in pancreatic β cell area as well as reduced insulin sensitivity after HFD feeding compared to WD or LFD, whereas female mice did not. CONCLUSIONS Male and female C57BL/6 J mice exhibited strikingly different responses in weight, food consumption, locomotor activity, energy expenditure and β cell adaptation upon dietary manipulation, with the latter exhibiting less striking phenotypic changes. We conclude that the nature of these responses emphasizes the need to contextualize studies of obesity pathophysiology and treatment with respect to sex.
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Affiliation(s)
- Isabel Casimiro
- Department of Medicine, Section of Endocrinology, Diabetes & Metabolism, University of Chicago, Chicago, IL 60637, United States of America
| | - Natalie D Stull
- Indiana Biosciences Research Institute, Indianapolis, IN 46202, United States of America
| | - Sarah A Tersey
- Department of Medicine, Section of Endocrinology, Diabetes & Metabolism, University of Chicago, Chicago, IL 60637, United States of America.
| | - Raghavendra G Mirmira
- Department of Medicine, Section of Endocrinology, Diabetes & Metabolism, University of Chicago, Chicago, IL 60637, United States of America.
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Liu Y, Xu XY, Shen Y, Ye CF, Hu N, Yao Q, Lv XZ, Long SL, Ren C, Lang YY, Liu YL. Ghrelin protects against obesity-induced myocardial injury by regulating the lncRNA H19/miR-29a/IGF-1 signalling axis. Exp Mol Pathol 2020; 114:104405. [PMID: 32084395 DOI: 10.1016/j.yexmp.2020.104405] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 01/10/2020] [Accepted: 02/15/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Obesity is associated with the impairment of cardiac fitness and consequent ventricular dysfunction and heart failure. Ghrelin has been largely documented to be cardioprotective against ischaemia/reperfusion injury. However, the role of ghrelin in obesity-induced myocardial injury is largely unknown. This study sought to determine the cardiac effect of ghrelin against obesity-induced injury and the underlying mechanisms. METHODS The effect of ghrelin was evaluated in a mouse model of obesity and a palmitic acid (PA)-treated cardiomyocyte cell line with or without ghrelin transfection. Gene and protein expression levels were determined by real-time PCR and western blot, respectively. Cell apoptosis was measured by flow cytometry analysis. RESULTS In the present study, we found that both a high-fat diet (HFD) and PA treatment caused myocardial injury by increasing apoptosis and the expression of inflammatory cytokines. Overexpression of ghrelin reversed the effects induced by HFD or PA treatment. Knockdown of lncRNA H19 or overexpression of miR-29a abrogated the cardioprotective effects of ghrelin against apoptosis and inflammation. We also found that IGF-1 was a target gene of miR-29a and that H19 regulated IGF-1 expression via miR-29a. Overexpression of IGF-1 partially reversed the apoptosis and inflammation promoting effects of miR-29a. CONCLUSIONS Our findings suggested that ghrelin protected against obesity-induced myocardial injury by regulating the H19/miR-29a/IGF-1 signalling axis, providing further evidence for the clinical application of ghrelin.
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Affiliation(s)
- Yang Liu
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Xin-Yue Xu
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Yang Shen
- Molecular medicine laboratory, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Chun-Feng Ye
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Na Hu
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Qing Yao
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Xiu-Zi Lv
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Sheng-Lan Long
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Chao Ren
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China
| | - Yuan-Yuan Lang
- Medical Imaging Center, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China.
| | - Yan-Ling Liu
- Department of Pediatrics, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, PR China.
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Vercalsteren E, Vranckx C, Frederix L, Lox M, Lijnen HR, Scroyen I, Hemmeryckx B. Advanced-age C57BL/6JRj mice do not develop obesity upon western-type diet exposure. Adipocyte 2019; 8:105-113. [PMID: 30860940 PMCID: PMC6768272 DOI: 10.1080/21623945.2019.1590893] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 02/06/2019] [Accepted: 02/13/2019] [Indexed: 12/16/2022] Open
Abstract
Obesity has become a global health-threat for every age group. It is well known that young mice (10-12 weeks of age) fed a western-type diet (WD) become obese and develop higher cholesterol levels and liver steatosis whereas insulin sensitivity is reduced. Less is known, however, about the effect of a WD on advanced-age mice. Therefore, 10 week-old (young) and 22 month-old (advanced-age), male C57BL/6JRj mice were kept on either a WD or a control diet (SFD) for 15 weeks. In contrast to young mice, advanced-age mice on WD did not show a higher body weight or adipose tissue (AT)-masses, suggesting a protection against diet-induced obesity. Furthermore, plasma adiponectin and leptin levels were not affected upon WD-feeding. A WD, however, did induce more hepatic lipid accumulation as well as increased hepatic expression of the macrophage marker F4/80, in advanced-age mice. There were no significant differences in mRNA levels of uncoupling protein-1 or F4/80 in brown AT (BAT) or of several intestinal integrity markers in colon suggesting that the protection against obesity is not due to excessive BAT or to impaired intestinal absorption of fat. Thus, advanced-age mice, in contrast to their younger counterparts, appeared to be protected against diet-induced obesity.
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Affiliation(s)
- Ellen Vercalsteren
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Christine Vranckx
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Liesbeth Frederix
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Marleen Lox
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - H. Roger Lijnen
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Ilse Scroyen
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Bianca Hemmeryckx
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
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Singh H, Pragasam SJ, Venkatesan V. Emerging Therapeutic Targets for Metabolic Syndrome: Lessons from Animal Models. Endocr Metab Immune Disord Drug Targets 2019; 19:481-489. [DOI: 10.2174/1871530319666181130142642] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 08/26/2018] [Accepted: 10/30/2018] [Indexed: 01/01/2023]
Abstract
Background:
Metabolic syndrome is a cluster of medical conditions that synergistically
increase the risk of heart diseases and diabetes. The current treatment strategy for metabolic syndrome
focuses on treating its individual components. A highly effective agent for metabolic syndrome has yet
to be developed. To develop a target for metabolic syndrome, the mechanism encompassing different
organs - nervous system, pancreas, skeletal muscle, liver and adipose tissue - needs to be understood.
Many animal models have been developed to understand the pathophysiology of metabolic syndrome.
Promising molecular targets have emerged while characterizing these animals. Modulating these targets
is expected to treat some components of metabolic syndrome.
Objective:
o discuss the emerging molecular targets in an animal model of metabolic syndrome.
Methods:
A literature search was performed for the retrieval of relevant articles.
Conclusion:
Multiple genes/pathways that play important role in the development of Metabolic Syndrome
are discussed.
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Affiliation(s)
- Himadri Singh
- Stem Cell Research/Biochemistry, National Institute of Nutrition, Hyderabad-500007, India
| | - Samuel Joshua Pragasam
- Stem Cell Research/Biochemistry, National Institute of Nutrition, Hyderabad-500007, India
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Vercalsteren E, Vranckx C, Lijnen HR, Hemmeryckx B, Scroyen I. Adiposity and metabolic health in mice deficient in intestinal alkaline phosphatase. Adipocyte 2018; 7:149-155. [PMID: 30064292 DOI: 10.1080/21623945.2018.1493899] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Intestinal alkaline phosphatase 3 (AKP3) is an enzyme that was reported to play a role in lipid metabolism and to prevent high fat diet-induced metabolic syndrome in mice. To investigate a potential functional role of AKP3 in diet-induced adiposity and metabolic health, we have kept male and female wild-type or AKP3 deficient mice on a high fat diet for 15 weeks to induce obesity and compared those with mice kept on standard fat diet. Body weight as well as adipose tissue mass were statistically significantly higher upon high fat diet feeding for mice of both genders and genotypes. Female mice of either genotype kept on high fat diet gained less weight, resulting in smaller adipose tissue depots with smaller adipocytes. However, AKP3 deficiency had no significant effect on body weight gain or adipose tissue mass and did not affect adipocyte size or density. Gene expression analysis revealed no effect of the genotype on inflammatory parameters in adipose tissue, except for tumor necrosis factor alpha, which was higher in mesenteric adipose tissue of female obese mice. Plasma glucose and insulin levels were also not affected in obese AKP3 deficient mice. Overall, our data do not support a functional role of AKP3 in adipose tissue development, or insulin sensitivity.
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Affiliation(s)
| | - Christine Vranckx
- Center for Molecular and Vascular Biology, KU Leuven, Leuven, Belgium
| | - H. Roger Lijnen
- Center for Molecular and Vascular Biology, KU Leuven, Leuven, Belgium
| | - Bianca Hemmeryckx
- Center for Molecular and Vascular Biology, KU Leuven, Leuven, Belgium
| | - Ilse Scroyen
- Center for Molecular and Vascular Biology, KU Leuven, Leuven, Belgium
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Alessi MC, Wojta J. Obesity and vascular disease: From bench to bedside. Thromb Haemost 2017; 110:632-3. [DOI: 10.1160/th13-08-0685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 08/20/2013] [Indexed: 11/05/2022]
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Morris JL, Bridson TL, Alim MA, Rush CM, Rudd DM, Govan BL, Ketheesan N. Development of a diet-induced murine model of diabetes featuring cardinal metabolic and pathophysiological abnormalities of type 2 diabetes. Biol Open 2016; 5:1149-62. [PMID: 27402965 PMCID: PMC5004603 DOI: 10.1242/bio.016790] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The persistent rise in global incidence of type 2 diabetes (T2D) continues to have significant public health and economic implications. The availability of relevant animal models of T2D is critical to elucidating the complexity of the pathogenic mechanisms underlying this disease and the implications this has on susceptibility to T2D complications. Whilst many high-fat diet-induced rodent models of obesity and diabetes exist, growing appreciation of the contribution of high glycaemic index diets on the development of hyperglycaemia and insulin resistance highlight the requirement for animal models that more closely represent global dietary patterns reflective of modern society. To that end, we sought to develop and validate a murine model of T2D based on consumption of an energy-dense diet containing moderate levels of fat and a high glycaemic index to better reflect the aetiopathogenesis of T2D. Male C57BL/6 mice were fed an energy-dense (ED) diet and the development of pathological features used in the clinical diagnosis of T2D was assessed over a 30-week period. Compared with control mice, 87% of mice fed an ED diet developed pathognomonic signs of T2D including glucose intolerance, hyperglycaemia, glycosylated haemoglobin (HbA1c) and glycosuria within 30 weeks. Furthermore, dyslipidaemia, chronic inflammation, alterations in circulating leucocytes and renal impairment were also evident in ED diet-fed mice compared with mice receiving standard rodent chow. Longitudinal profiling of metabolic and biochemical parameters provide support of an aetiologically and clinically relevant model of T2D that will serve as a valuable tool for mechanistic and therapeutic studies investigating the pathogenic complications of T2D.
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Affiliation(s)
- Jodie L Morris
- Australian Institute of Tropical Health and Medicine, Division of Tropical Health and Medicine, James Cook University, Townsville, Queensland 4811, Australia
| | - Tahnee L Bridson
- Australian Institute of Tropical Health and Medicine, Division of Tropical Health and Medicine, James Cook University, Townsville, Queensland 4811, Australia
| | - Md Abdul Alim
- Australian Institute of Tropical Health and Medicine, Division of Tropical Health and Medicine, James Cook University, Townsville, Queensland 4811, Australia
| | - Catherine M Rush
- Australian Institute of Tropical Health and Medicine, Division of Tropical Health and Medicine, James Cook University, Townsville, Queensland 4811, Australia
| | - Donna M Rudd
- Australian Institute of Tropical Health and Medicine, Division of Tropical Health and Medicine, James Cook University, Townsville, Queensland 4811, Australia
| | - Brenda L Govan
- Australian Institute of Tropical Health and Medicine, Division of Tropical Health and Medicine, James Cook University, Townsville, Queensland 4811, Australia
| | - Natkunam Ketheesan
- Australian Institute of Tropical Health and Medicine, Division of Tropical Health and Medicine, James Cook University, Townsville, Queensland 4811, Australia
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Huttala O, Mysore R, Sarkanen JR, Heinonen T, Olkkonen VM, Ylikomi T. Differentiation of human adipose stromal cells in vitro into insulin-sensitive adipocytes. Cell Tissue Res 2016; 366:63-74. [DOI: 10.1007/s00441-016-2409-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 04/05/2016] [Indexed: 12/28/2022]
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Abstract
The upper part of subcutaneous white adipose tissue (SWAT) is closely associated with the reticular dermis, surrounds hair follicles and is of great importance for a range of skin functions. In this issue of Experimental Dermatology, Driskell and colleagues propose a nomenclature in which the upper SWAT layer is renamed dermal WAT (DWAT), and its cells intradermal adipocytes. Some pros and cons are discussed below.
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Affiliation(s)
- Marlon R Schneider
- Gene Center, Institute of Molecular Animal Breeding and Biotechnology, University of Munich, Munich, Germany
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11
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Vaittinen M, Kolehmainen M, Rydén M, Eskelinen M, Wabitsch M, Pihlajamäki J, Uusitupa M, Pulkkinen L. MFAP5 is related to obesity-associated adipose tissue and extracellular matrix remodeling and inflammation. Obesity (Silver Spring) 2015; 23:1371-8. [PMID: 26054006 DOI: 10.1002/oby.21103] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 03/03/2015] [Indexed: 01/14/2023]
Abstract
OBJECTIVE Low-grade inflammation is involved in adipose tissue (AT) and extracellular matrix (ECM) remodeling and induces deposition of ECM proteins in AT. We have previously shown that MFAP5 (microfibrillar-associated protein 5) expression decreases in AT after weight loss. The aim of this study was to investigate MFAP5 localization in human AT and gene expression in adipocytes and the role of MFAP5 in adipocyte metabolism and inflammation. METHODS MFAP5 protein localization and gene expression were studied with immunohistochemistry and quantitative reverse transcriptase PCR (RT-qPCR) in human subcutaneous AT and cultured Simpson-Golabi-Behmel syndrome (SGBS) adipocytes, respectively. The effect of MFAP5 knock-down by siRNA on gene expression and insulin action was examined with RT-qPCR, western blot, and insulin-stimulated glucose uptake. The effect of different cytokines on MFAP5 gene and protein expression was investigated in cultured human SGBS preadipocytes. RESULTS MFAP5 protein was highly expressed in AT, and gene expression decreased during adipocyte differentiation in SGBS cells. Treatment of preadipocytes with TNFα and TGFβ1 increased MFAP5 gene and protein expression. Furthermore, MFAP5 knock-down decreased the expression of genes involved in inflammation. CONCLUSIONS Our results demonstrate that factors involving low-grade inflammation modulate MFAP5 expression and that the modified expression of MFAP5 may further regulate AT inflammation.
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Affiliation(s)
- Maija Vaittinen
- Department of Clinical Nutrition, University of Eastern Finland, Institute of Public Health and Clinical Nutrition, Kuopio, Finland
| | - Marjukka Kolehmainen
- Department of Clinical Nutrition, University of Eastern Finland, Institute of Public Health and Clinical Nutrition, Kuopio, Finland
| | - Mikael Rydén
- Department of Medicine (H7), Karolinska Institute, Karolinska University Hospital, Huddinge, Stockholm, Sweden
| | - Matti Eskelinen
- Department of Surgery, Kuopio University Hospital, Kuopio, Finland
| | - Martin Wabitsch
- Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, University of Ulm, Ulm, Germany
| | - Jussi Pihlajamäki
- Department of Clinical Nutrition, University of Eastern Finland, Institute of Public Health and Clinical Nutrition, Kuopio, Finland
- Departments of Medicine and Clinical Nutrition, Obesity Center, Kuopio University Hospital, Kuopio, Finland
| | - Matti Uusitupa
- Department of Clinical Nutrition, University of Eastern Finland, Institute of Public Health and Clinical Nutrition, Kuopio, Finland
- Research Unit, Kuopio University Hospital, Kuopio, Finland
| | - Leena Pulkkinen
- Department of Clinical Nutrition, University of Eastern Finland, Institute of Public Health and Clinical Nutrition, Kuopio, Finland
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Wieczorek E, Jablonska E, Wasowicz W, Reszka E. Matrix metalloproteinases and genetic mouse models in cancer research: a mini-review. Tumour Biol 2014; 36:163-75. [PMID: 25352026 PMCID: PMC4315474 DOI: 10.1007/s13277-014-2747-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 10/15/2014] [Indexed: 01/04/2023] Open
Abstract
Carcinogenesis is a multistep and also a multifactorial process that involves agents like genetic and environmental factors. Matrix metalloproteinases (MMPs) are major proteolytic enzymes which are involved in cancer cell migration, invasion, and metastasis. Genetic variations in genes encoding the MMPs were shown in human studies to influence cancer risk and phenotypic features of a tumor. The complex role of MMPs seems to be important in the mechanism of carcinogenesis, but it is not well recognized. Rodent studies concentrated particularly on the better understanding of the biological functions of the MMPs and their impact on the pathological process, also through the modification of Mmp genes. This review presents current knowledge and the existing evidence on the importance of selected MMPs in genetic mouse models of cancer and human genetic association studies. Further, this work can be useful for scientists studying the role of the genetic impact of MMPs in carcinogenesis.
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Affiliation(s)
- Edyta Wieczorek
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Ewa Jablonska
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Wojciech Wasowicz
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Edyta Reszka
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, Lodz, Poland
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13
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Jay FF, Schneider MR. A reporter mouse line with doxycyclin-inducible expression of β-glucosidase. Histochem Cell Biol 2014; 142:721-4. [PMID: 25091595 DOI: 10.1007/s00418-014-1255-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2014] [Indexed: 02/01/2023]
Abstract
Mouse lines allowing the inducible expression of transgenes became essential tools for studying gene function and for developing accurate animal models for human diseases. A key component of this tool is the availability of "reporter" lines, mice expressing transgenes encoding easily detectable enzymes or other proteins normally not associated with eukaryotic tissues. Such lines may be suitable for a number of applications, including lineage tracing, label-retaining experiments, and the identification and monitoring of regulatory elements important for tissue-specific gene expression. However, only a limited number of reporter lines suitable for inducible expression systems are available. Here, we employed pronuclear DNA microinjection to generate a new reporter mouse line that allows the inducible expression of β-glucosidase, a recently reported stable and easily detectable protein, upon administration of doxycyclin to the drinking water. This novel line was established in the widely used inbreed background C57BL/6, and the transgene is transmitted between generations in a Mendelian fashion. When crossed to a K14-rtTA mouse line, activation of β-glucosidase expression in the epidermal basal layer is easily detected in double-transgenic animals receiving doxycyclin, while no expression is seen in double-transgenic mice without doxycyclin treatment or in animals carrying only one transgene. We anticipate that this new mouse line will become a valuable tool for a number of applications in vivo, including label-retaining experiments and testing the appropriate regulation of rtTA cassettes under different promoters in novel transgenic mouse lines.
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Affiliation(s)
- Freya F Jay
- Chair for Molecular Animal Breeding and Biotechnology, Gene Center, LMU Munich, Feodor-Lynen-Str. 25, 81377, Munich, Germany
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Peng Z, Dong Z, Chang Q, Zhan W, Zeng Z, Zhang S, Lu F. Tissue engineering chamber promotes adipose tissue regeneration in adipose tissue engineering models through induced aseptic inflammation. Tissue Eng Part C Methods 2014; 20:875-85. [PMID: 24559078 DOI: 10.1089/ten.tec.2013.0431] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Tissue engineering chamber (TEC) makes it possible to generate significant amounts of mature, vascularized, stable, and transferable adipose tissue. However, little is known about the role of the chamber in tissue engineering. Therefore, to investigate the role of inflammatory response and the change in mechanotransduction started by TEC after implantation, we placed a unique TEC model on the surface of the groin fat pads in rats to study the expression of cytokines and tissue development in the TEC. The number of infiltrating cells was counted, and vascular endothelial growth factor (VEGF) and monocyte chemotactic protein-1 (MCP-1) expression levels in the chamber at multiple time points postimplantation were analyzed by enzyme-linked immunosorbent assay. Tissue samples were collected at various time points and labeled for specific cell populations. The result showed that new adipose tissue formed in the chamber at day 60. Also, the expression of MCP-1 and VEGF in the chamber decreased slightly from an early stage as well as the number of the infiltrating cells. A large number of CD34+/perilipin- perivascular cells could be detected at day 30. Also, the CD34+/perilipin+ adipose precursor cell numbers increased sharply by day 45 and then decreased by day 60. CD34-/perilipin+ mature adipocytes were hard to detect in the chamber content at day 30, but their number increased and then peaked at day 60. Ki67-positive cells could be found near blood vessels and their number decreased sharply over time. Masson's trichrome showed that collagen was the dominant component of the chamber content at early stage and was replaced by newly formed small adipocytes over time. Our findings suggested that the TEC implantation could promote the proliferation of adipose precursor cells derived from local adipose tissue, increase angiogenesis, and finally lead to spontaneous adipogenesis by inducing aseptic inflammation and changing local mechanotransduction.
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Affiliation(s)
- Zhangsong Peng
- Department of Plastic and Cosmetic Surgery, Nanfang Hospital, Southern Medical University , Guang Zhou, P.R. China
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