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Adipose Tissue-Derived Signatures for Obesity and Type 2 Diabetes: Adipokines, Batokines and MicroRNAs. J Clin Med 2019; 8:jcm8060854. [PMID: 31208019 PMCID: PMC6617388 DOI: 10.3390/jcm8060854] [Citation(s) in RCA: 100] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/07/2019] [Accepted: 06/11/2019] [Indexed: 12/13/2022] Open
Abstract
: Obesity is one of the main risk factors for type 2 diabetes mellitus (T2DM). It is closely related to metabolic disturbances in the adipose tissue that primarily functions as a fat reservoir. For this reason, adipose tissue is considered as the primary site for initiation and aggravation of obesity and T2DM. As a key endocrine organ, the adipose tissue communicates with other organs, such as the brain, liver, muscle, and pancreas, for the maintenance of energy homeostasis. Two different types of adipose tissues-the white adipose tissue (WAT) and brown adipose tissue (BAT)-secrete bioactive peptides and proteins, known as "adipokines" and "batokines," respectively. Some of them have beneficial anti-inflammatory effects, while others have harmful inflammatory effects. Recently, "exosomal microRNAs (miRNAs)" were identified as novel adipokines, as adipose tissue-derived exosomal miRNAs can affect other organs. In the present review, we discuss the role of adipose-derived secretory factors-adipokines, batokines, and exosomal miRNA-in obesity and T2DM. It will provide new insights into the pathophysiological mechanisms involved in disturbances of adipose-derived factors and will support the development of adipose-derived factors as potential therapeutic targets for obesity and T2DM.
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D'Elia L, Manfredi M, Perna L, Iacone R, Russo O, Strazzullo P, Galletti F. Circulating leptin levels predict the decline in renal function with age in a sample of adult men (The Olivetti Heart Study). Intern Emerg Med 2019; 14:507-513. [PMID: 30117101 DOI: 10.1007/s11739-018-1924-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 08/03/2018] [Indexed: 02/08/2023]
Abstract
Leptin (LPT) is associated with a number of cardiovascular risk factors, such as high blood pressure (BP), insulin resistance and excess in body weight. Some studies find an unfavorable cross-sectional association between LPT and renal disease, in particular in patients with already known kidney dysfunction. There are few data on the relationship between LPT and changes in renal function over time in subjects without evidence of kidney dysfunction. Hence, the aim of this study is to estimate the predictive role of LPT on the decline in renal function occurring in an 8-year follow-up observation of a sample of adult apparently healthy men (The Olivetti Heart Study). The study includes 319 untreated normotensive and nondiabetic men without clinical evidence of renal dysfunction (creatinine clearance-CrCl > 60 mL/min/1.73 m2) at baseline. At baseline, LPT is significantly and positively associated with BMI, abdominal circumference, BP and Homa index, no relationship is found with CrCl. At the end of the 8-year follow-up, a significant association is detected between baseline LPT and changes occurring in BP. Moreover, an inverse correlation with changes in CrCl is found (r = - 0.12). This unfavorable relationship between baseline LPT and decline in renal function is also confirmed in the multivariate analyses, after adjustment for all potential confounders (R2 = 0.42, p < 0.01). The results of this prospective investigation suggest a predictive role of circulating LPT levels on decline in renal function over time, independently of main potential confounders, in normotensive and nondiabetic men with normal renal function at baseline.
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Affiliation(s)
- Lanfranco D'Elia
- Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, "Federico II" University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy
| | - Martina Manfredi
- Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, "Federico II" University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy
| | - Ludovica Perna
- Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, "Federico II" University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy
| | - Roberto Iacone
- Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, "Federico II" University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy
| | - Ornella Russo
- Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, "Federico II" University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy
| | - Pasquale Strazzullo
- Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, "Federico II" University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy
| | - Ferruccio Galletti
- Department of Clinical Medicine and Surgery, ESH Excellence Center of Hypertension, "Federico II" University of Naples Medical School, Via S. Pansini, 5, 80131, Naples, Italy.
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103
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Monteiro L, Pereira JADS, Palhinha L, Moraes‐Vieira PMM. Leptin in the regulation of the immunometabolism of adipose tissue‐macrophages. J Leukoc Biol 2019; 106:703-716. [DOI: 10.1002/jlb.mr1218-478r] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/19/2019] [Accepted: 04/26/2019] [Indexed: 12/13/2022] Open
Affiliation(s)
- Lauar Monteiro
- Laboratory of ImmunometabolismDepartment of Genetics, Evolution, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas Sao Paulo Brazil
| | - Jéssica Aparecida da Silva Pereira
- Laboratory of ImmunometabolismDepartment of Genetics, Evolution, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas Sao Paulo Brazil
- Department of ImmunologyInstitute of Biomedical SciencesUniversity of Sao Paulo Sao Paulo Brazil
| | - Lohanna Palhinha
- Laboratory of ImmunopharmacologyOswaldo Cruz InstituteOswaldo Cruz Foundation (FIOCRUZ) Rio de Janeiro Rio de Janeiro Brazil
| | - Pedro Manoel M. Moraes‐Vieira
- Laboratory of ImmunometabolismDepartment of Genetics, Evolution, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas Sao Paulo Brazil
- Department of ImmunologyInstitute of Biomedical SciencesUniversity of Sao Paulo Sao Paulo Brazil
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104
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105
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In vitro effect of leptin on human cardiac contractility. J Nutr Sci 2019; 8:e12. [PMID: 31019683 PMCID: PMC6465679 DOI: 10.1017/jns.2019.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 02/13/2019] [Accepted: 02/18/2019] [Indexed: 11/12/2022] Open
Abstract
Leptin, a hormone produced by adipose tissue, has been linked to many regulatory pathways. Its role in the complex relationship between obesity and CVD is not yet clear. The aim of the present study was to evaluate whether leptin interferes directly with cardiac function regulation, altering its contractile force character, and hence contributing to different pathological processes. Muscle samples were obtained from human atrial myocardium. Each trial included two samples from the same patient. They were simultaneously electrically stimulated under sustained perfusion to perform isometric contractions. One sample was treated with a high concentration of human recombinant leptin (1 µg/ml). The other was treated with placebo and served as a control. The exhibited contraction forces (CF) and the contraction duration (CD) after 20 min of treatment were normalised by dividing them by the values before the treatment and reported as a percentage. A total of ten successful trials were conducted. Exposure to leptin did not yield a statistically significant variation in both CF and CF. In the treatment group, CF% measured 108 (95 % CI 91, 125) % and CD% measured 95 (95 % CI 90, 101) % after 20 min. In the control group, CF% measured 105 (90 % CI 84, 126) % and CD% measured 92 (95 % CI 80, 105) % after 20 min. We concluded that leptin does not alter the contractile character of human atrial tissues, even in supraphysiological dosage. These results suggest that leptin does not play a role in short-term cardiac regulation.
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106
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Njunge JM, Gwela A, Kibinge NK, Ngari M, Nyamako L, Nyatichi E, Thitiri J, Gonzales GB, Bandsma RHJ, Walson JL, Gitau EN, Berkley JA. Biomarkers of post-discharge mortality among children with complicated severe acute malnutrition. Sci Rep 2019; 9:5981. [PMID: 30979939 PMCID: PMC6461700 DOI: 10.1038/s41598-019-42436-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Accepted: 04/01/2019] [Indexed: 12/22/2022] Open
Abstract
High mortality after discharge from hospital following acute illness has been observed among children with Severe Acute Malnutrition (SAM). However, mechanisms that may be amenable to intervention to reduce risk are unknown. We performed a nested case-control study among HIV-uninfected children aged 2-59 months treated for complicated SAM according to WHO recommendations at four Kenyan hospitals. Blood was drawn from 1778 children when clinically judged stable before discharge from hospital. Cases were children who died within 60 days. Controls were randomly selected children who survived for one year without readmission to hospital. Untargeted proteomics, total protein, cytokines and chemokines, and leptin were assayed in plasma and corresponding biological processes determined. Among 121 cases and 120 controls, increased levels of calprotectin, von Willebrand factor, angiotensinogen, IL8, IL15, IP10, TNFα, and decreased levels of leptin, heparin cofactor 2, and serum paraoxonase were associated with mortality after adjusting for possible confounders. Acute phase responses, cellular responses to lipopolysaccharide, neutrophil responses to bacteria, and endothelial responses were enriched among cases. Among apparently clinically stable children with SAM, a sepsis-like profile is associated with subsequent death. This may be due to ongoing bacterial infection, translocated bacterial products or deranged immune response during nutritional recovery.
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Affiliation(s)
- James M Njunge
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya.
- KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya.
| | - Agnes Gwela
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
- KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya
| | | | - Moses Ngari
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
- KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya
| | - Lydia Nyamako
- KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya
| | - Emily Nyatichi
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
- KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya
| | - Johnstone Thitiri
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
- KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya
| | - Gerard Bryan Gonzales
- Department of Gastroenterology, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
- Inflammation Research Centre, Flemish Institute for Biotechnology, Ghent, Belgium
| | - Robert H J Bandsma
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
- Centre for Global Child Health, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Judd L Walson
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
- Departments of Global Health, Medicine, Paediatrics and Epidemiology, University of Washington, Seattle, Washington, USA
| | - Evelyn N Gitau
- African Population and Health Research Centre, Nairobi, Kenya
| | - James A Berkley
- The Childhood Acute Illness & Nutrition (CHAIN) Network, Nairobi, Kenya
- KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya
- Centre for Tropical Medicine & Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
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Dalle H, Garcia M, Antoine B, Boehm V, Do TTH, Buyse M, Ledent T, Lamazière A, Magnan C, Postic C, Denis RG, Luquet S, Fève B, Moldes M. Adipocyte Glucocorticoid Receptor Deficiency Promotes Adipose Tissue Expandability and Improves the Metabolic Profile Under Corticosterone Exposure. Diabetes 2019; 68:305-317. [PMID: 30455377 DOI: 10.2337/db17-1577] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 11/07/2018] [Indexed: 01/20/2023]
Abstract
Widely used for their anti-inflammatory and immunosuppressive properties, glucocorticoids are nonetheless responsible for the development of diabetes and lipodystrophy. Despite an increasing number of studies focused on the adipocyte glucocorticoid receptor (GR), its precise role in the molecular mechanisms of these complications has not been elucidated. In keeping with this goal, we generated a conditional adipocyte-specific murine model of GR invalidation (AdipoGR knockout [KO] mice). Interestingly, when administered a corticosterone treatment to mimic hypercorticism conditions, AdipoGR-KO mice exhibited an improved glucose tolerance and insulin sensitivity. This was related to the adipose-specific activation of the insulin-signaling pathway, which contributed to fat mass expansion, as well as a shift toward an anti-inflammatory macrophage polarization in adipose tissue of AdipoGR-KO animals. Moreover, these mice were protected against ectopic lipid accumulation in the liver and displayed an improved lipid profile, contributing to their overall healthier phenotype. Altogether, our results indicate that adipocyte GR is a key factor of adipose tissue expansion and glucose and lipid metabolism control, which should be taken into account in the further design of adipocyte GR-selective modulators.
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Affiliation(s)
- Héloïse Dalle
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Marie Garcia
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Bénédicte Antoine
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Vanessa Boehm
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Thi Thu Huong Do
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
| | - Marion Buyse
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
- Pharmacy Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine Hospital, Paris, France
| | - Tatiana Ledent
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
| | - Antonin Lamazière
- INSERM, CNRS UMR 70203, Laboratoire des Biomolécules, Assistance Publique-Hôpitaux de Paris, École Normale Supérieure, Sorbonne University, Paris, France
| | - Christophe Magnan
- Biologie Fonctionelle & Adaptative, CNRS UMR 8251, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Catherine Postic
- INSERM, U1016, Cochin Institute, Paris, France
- CNRS UMR 8104, Paris, France
- Paris Descartes University, Sorbonne Paris Cité, Paris, France
| | - Raphaël George Denis
- Biologie Fonctionelle & Adaptative, CNRS UMR 8251, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Serge Luquet
- Biologie Fonctionelle & Adaptative, CNRS UMR 8251, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Bruno Fève
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
- Endocrinology Department, Assistance Publique-Hôpitaux de Paris, Saint-Antoine Hospital, Paris, France
| | - Marthe Moldes
- INSERM, Saint-Antoine Research Center, Sorbonne University, Paris, France
- Hospital-Universitary Institute, Institute of Cardiometabolism and Nutrition, Paris, France
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108
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Daryabor G, Kabelitz D, Kalantar K. An update on immune dysregulation in obesity-related insulin resistance. Scand J Immunol 2019; 89:e12747. [PMID: 30593678 DOI: 10.1111/sji.12747] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/22/2018] [Accepted: 12/25/2018] [Indexed: 12/29/2022]
Abstract
Obesity is associated with chronic low-grade inflammation of the adipose tissue (AT) that might develop into systemic inflammation, insulin resistance (IR) and an increased risk of type 2 diabetes mellitus (T2DM) in severe obese rodents and humans. In the lean state, small normal adipocytes and AT macrophages interact with each other to maintain metabolic homeostasis but during obesity, enlarged adipocytes secrete inflammatory mediators and express immune receptors to recruit immune cells and aggravate the inflammation. The better understanding of the obesity-related inflammatory milieu and the sequential events leading to IR could be helpful in designing new preventive and therapeutic strategies. The present review will discuss the cellular and molecular abnormalities participating in the pathogenesis of obesity in obese individuals as well as high-fat diet (HFD)-fed mice, a mouse model of obesity.
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Affiliation(s)
- Gholamreza Daryabor
- Department of Immunology, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | | | - Kurosh Kalantar
- Department of Immunology, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
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109
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Gonzalez-Gil AM, Peschard-Franco M, Castillo EC, Gutierrez-DelBosque G, Treviño V, Silva-Platas C, Perez-Villarreal L, Garcia-Rivas G, Elizondo-Montemayor L. Myokine-adipokine cross-talk: potential mechanisms for the association between plasma irisin and adipokines and cardiometabolic risk factors in Mexican children with obesity and the metabolic syndrome. Diabetol Metab Syndr 2019; 11:63. [PMID: 31404407 PMCID: PMC6683550 DOI: 10.1186/s13098-019-0458-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 07/25/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Adipokines and the myokine irisin, involved in mechanisms associated with obesity and metabolic syndrome (MS), are understudied in the pediatric population. OBJECTIVE To investigate the relationship between irisin, and leptin, resistin, adiponectin, adipsin, anthropometric and cardiovascular risk factors in Mexican children. METHODS A cross-sample of 126 Mexican children aged 6-12 years old were classified as normal weight (n = 46), obese (n = 40), and MS (n = 40) according to CDC's and Cook's age-modified criteria for obesity and MS. Anthropometric parameters and blood pressure were determined and percentiles calculated for age and gender. Irisin, leptin, adiponectin, adipsin, resistin, triglycerides, glucose, high-density lipoprotein cholesterol (HDL-c) levels, and physical activity were determined. Statistical tests for differences between groups, correlation, and multiple regression analyses were performed. RESULTS Irisin plasma levels were significantly lower in the obese (6.08 [4.68-6.65]) and MS groups (6.46 [5.74-7.02]) compared with the normal-weight group (8.05 [7.24-8.94]) (p < 0.001). Irisin levels were not influenced by age or gender, but significant dispersion was observed in obese girls (95% CI median [2.29-6.30]). Leptin, resistin, and adipsin levels were significantly increased in the obese and MS groups. Lean-fat ratio was significantly higher in the NW group. Irisin correlated negatively with leptin (- 0.310), resistin (- 0.389), adipsin (- 0.362), BMI% (-0.472), WC% (- 0.453), BMI z-score (- 0.496), fat free mass (- 0.257), fat percentage (- 0.532), fat mass (- 0.515), triglycerides (- 0.291), the number of cardiometabolic risk factors (- 0.443) (p < 0.001); positively with lean-fat ratio (0.489) and HDL-c (0.328) (p < 0.001) and none with physical activity (p < 0.001). Following stepwise multiple linear regression analysis, the lean-fat ratio was the only determinant of irisin levels (B = 1.168, p < 0.001). CONCLUSIONS Lean-fat ratio, more than the absolute amount of muscle or fat mass, as well as potential myokine-adipokine cross-talk mechanisms may explain the lower irisin levels in children with obesity and MS, through blunted compensatory responses interfering with tissue-dependent irisin secretion, contributing to a continuous deleterious effect cycle.
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Affiliation(s)
- Adrian M. Gonzalez-Gil
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Center for Research in Clinical Nutrition and Obesity, Tecnologico de Monterrey, Ave. Morones Prieto 300, 64710 Monterrey, N.L. Mexico
| | - Mariana Peschard-Franco
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Center for Research in Clinical Nutrition and Obesity, Tecnologico de Monterrey, Ave. Morones Prieto 300, 64710 Monterrey, N.L. Mexico
| | - Elena C. Castillo
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Cardiovascular and Metabolomics Research Group, Hospital Zambrano Hellion, Tecnologico de Monterrey, 66278 San Pedro Garza Garcia, P.C. Mexico
| | - Gustavo Gutierrez-DelBosque
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Center for Research in Clinical Nutrition and Obesity, Tecnologico de Monterrey, Ave. Morones Prieto 300, 64710 Monterrey, N.L. Mexico
| | - Victor Treviño
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
| | - Christian Silva-Platas
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Cardiovascular and Metabolomics Research Group, Hospital Zambrano Hellion, Tecnologico de Monterrey, 66278 San Pedro Garza Garcia, P.C. Mexico
| | - Luisa Perez-Villarreal
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Center for Research in Clinical Nutrition and Obesity, Tecnologico de Monterrey, Ave. Morones Prieto 300, 64710 Monterrey, N.L. Mexico
| | - Gerardo Garcia-Rivas
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Cardiovascular and Metabolomics Research Group, Hospital Zambrano Hellion, Tecnologico de Monterrey, 66278 San Pedro Garza Garcia, P.C. Mexico
| | - Leticia Elizondo-Montemayor
- Escuela de Medicina y Ciencias de la Salud, Tecnologico de Monterrey, Ave. Morones Prieto 3000, 64710 Monterrey, N.L. Mexico
- Center for Research in Clinical Nutrition and Obesity, Tecnologico de Monterrey, Ave. Morones Prieto 300, 64710 Monterrey, N.L. Mexico
- Cardiovascular and Metabolomics Research Group, Hospital Zambrano Hellion, Tecnologico de Monterrey, 66278 San Pedro Garza Garcia, P.C. Mexico
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The Role of Inflammation in the Development of GDM and the Use of Markers of Inflammation in GDM Screening. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1134:217-242. [PMID: 30919340 DOI: 10.1007/978-3-030-12668-1_12] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Gestational diabetes mellitus is a hyperglycaemic state first recognised in pregnancy. GDM affects both mother and child. Women with GDM and their new-borns are at risk of developing type 2 diabetes in the future. The screening and diagnostic criteria for GDM are inconsistent and thus novel biomarkers of GDM are required to strengthen the screening and diagnostic processes in GDM. Chronic low-grade inflammation is linked to the majority of the well-established risk factors of GDM such as old age, obesity and PCOS. This review provides an overview of the present knowledge on the pathology of GDM, the screening criteria applied, the role of inflammation in the development of GDM and the use of markers of inflammation namely cytokines, oxidative stress markers, lipids, amino acids and iron markers in screening and diagnosis of GDM.
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111
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Maurya R, Bhattacharya P, Dey R, Nakhasi HL. Leptin Functions in Infectious Diseases. Front Immunol 2018; 9:2741. [PMID: 30534129 PMCID: PMC6275238 DOI: 10.3389/fimmu.2018.02741] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 11/07/2018] [Indexed: 01/26/2023] Open
Abstract
Leptin, a pleiotropic protein has long been recognized to play an important role in the regulation of energy homeostasis, metabolism, neuroendocrine function, and other physiological functions through its effects on the central nervous system (CNS) and peripheral tissues. Leptin is secreted by adipose tissue and encoded by the obese (ob) gene. Leptin acts as a central mediator which regulates immunity as well as nutrition. Importantly, leptin can modulate both innate and adaptive immune responses. Leptin deficiency/resistance is associated with dysregulation of cytokine production, increased susceptibility toward infectious diseases, autoimmune disorders, malnutrition and inflammatory responses. Malnutrition induces a state of immunodeficiency and an inclination to death from communicable diseases. Infectious diseases are the disease of poor who invariably suffer from malnutrition that could result from reduced serum leptin levels. Thus, leptin has been placed at the center of many interrelated functions in various pathogenic conditions, such as bacterial, viruses and parasitic infections. We review herein, the recent advances on the role of leptin in malnutrition in pathogenesis of infectious diseases with a particular emphasis on parasitic diseases such as Leishmaniasis, Trypanosomiasis, Amoebiasis, and Malaria.
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Affiliation(s)
- Radheshyam Maurya
- Department of Animal Biology, School of Life Science, University of Hyderabad, Hyderabad, India
| | - Parna Bhattacharya
- Division of Emerging and Transfusion Transmitted Diseases, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, United States
| | - Ranadhir Dey
- Division of Emerging and Transfusion Transmitted Diseases, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, United States
| | - Hira L. Nakhasi
- Division of Emerging and Transfusion Transmitted Diseases, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD, United States
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112
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Adipocytokines in Rheumatoid Arthritis: The Hidden Link between Inflammation and Cardiometabolic Comorbidities. J Immunol Res 2018; 2018:8410182. [PMID: 30584543 PMCID: PMC6280248 DOI: 10.1155/2018/8410182] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/19/2018] [Accepted: 10/11/2018] [Indexed: 02/07/2023] Open
Abstract
Rheumatoid arthritis is a chronic autoimmune disease affecting typically synovial joints and leading to progressive articular damage, disability, and reduced quality of life. Despite better recent therapeutic strategies improving long-term outcomes, RA is associated with a high rate of comorbidities, infections, malignancies, and cardiovascular disease (CVD). Remarkably, some well-known pathogenic proinflammatory mediators in RA, such as interleukin-1β (IL-1β) and tumor necrosis factor (TNF), may play a pivotal role in the development of CVD. Interestingly, different preclinical and clinical studies have suggested that biologic agents commonly used to treat RA patients may be effective in improving CVD. In this context, the contribution of adipocytokines has been suggested. Adipocytokines are pleiotropic molecules, mainly released by white adipose tissue and immune cells. Adipocytokines modulate the function of different tissues and cells, and in addition to energy homeostasis and metabolism, amplify inflammation, immune response, and tissue damage. Adipocytokines may contribute to the proinflammatory state in RA patients and development of bone damage. Furthermore, they could be associated with the occurrence of CVD. In this study, we reviewed available evidence about adipocytokines in RA, because of their involvement in disease activity, associated CVD, and possible biomarkers of prognosis and treatment outcome and because of their potential as a possible new therapeutic target.
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Żelechowska P, Kozłowska E, Pastwińska J, Agier J, Brzezińska-Błaszczyk E. Adipocytokine Involvement in Innate Immune Mechanisms. J Interferon Cytokine Res 2018; 38:527-538. [PMID: 30431386 DOI: 10.1089/jir.2018.0102] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The innate immune response is defined as an immensely complex and sophisticated process aimed at defending the organism against any disturbance in the body homeostasis, including invading pathogens. It requires a close cooperation of a vast amount of different cell types, recognized as inflammatory migrating cells, as well as stationary cells that form tissues. Moreover, innate immune mechanisms require an efficient functioning of various humoral components that exert a significant impact on physiological and pathological processes. Apart from commonly mentioned humoral factors, this group also includes a family of proteins known as adipocytokines that may act as pro- or anti-inflammatory agents or act both ways. Leptin, predominantly characterized as a proinflammatory adipokine, plays a crucial role in endothelium remodeling and regulation, as well as in cell survival and production of numerous cytokines. Adiponectin, similar to leptin, acts on the endothelial cells and the phagocytic properties of immune cells; however, it exerts an anti-inflammatory impact. Resistin has a documented role in the control of angiogenesis and stimulation of proinflammatory mediator generation and release. Furthermore, there are adipokines, ie, visfatin and chemerin, whose participation in the inflammatory processes is ambiguous. This review focuses on the current knowledge on the extensive role of selected adipokines in innate immune response.
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Affiliation(s)
- Paulina Żelechowska
- Department of Experimental Immunology, Medical University of Lodz, Lodz, Poland
| | - Elżbieta Kozłowska
- Department of Experimental Immunology, Medical University of Lodz, Lodz, Poland
| | - Joanna Pastwińska
- Department of Experimental Immunology, Medical University of Lodz, Lodz, Poland
- Laboratory of Cellular Immunology, Institute of Medical Biology, Polish Academy of Sciences, Lodz, Poland
| | - Justyna Agier
- Department of Experimental Immunology, Medical University of Lodz, Lodz, Poland
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Health, pre-disease and critical transition to disease in the psycho-immune-neuroendocrine network: Are there distinct states in the progression from health to major depressive disorder? Physiol Behav 2018; 198:108-119. [PMID: 30393143 DOI: 10.1016/j.physbeh.2018.10.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 10/01/2018] [Accepted: 10/25/2018] [Indexed: 01/03/2023]
Abstract
The psycho-immune-neuroendocrine (PINE) network is a regulatory network of interrelated physiological pathways that have been implicated in major depressive disorder (MDD). A model of disease progression for MDD is presented where the stable, healthy state of the PINE network (PINE physiome) undergoes progressive pathophysiological changes to an unstable but reversible pre-disease state (PINE pre-diseasome) with chronic stress. The PINE network may then undergo critical transition to a stable, possibly irreversible disease state of MDD (PINE pathome). Critical transition to disease is heralded by early warning signs which are detectible by biomarkers specific to the PINE network and may be used as a screening test for MDD. Critical transition to MDD may be different for each individual, as it is reliant on diathesis, which comprises genetic predisposition, intrauterine and developmental factors. Finally, we propose the PINE pre-disease state may form a "universal pre-disease state" for several non-communicable diseases (NCDs), and critical transition of the PINE network may lead to one of several frequently associated disease states (influenced by diathesis), supporting the existence of a common Chronic Illness Risk Network (CIRN). This may provide insight into both the puzzle of multifinality and the growing clinical challenge of multimorbidity.
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Malik M, Suboc TM, Tyagi S, Salzman N, Wang J, Ying R, Tanner MJ, Kakarla M, Baker JE, Widlansky ME. Lactobacillus plantarum 299v Supplementation Improves Vascular Endothelial Function and Reduces Inflammatory Biomarkers in Men With Stable Coronary Artery Disease. Circ Res 2018; 123:1091-1102. [PMID: 30355158 PMCID: PMC6205737 DOI: 10.1161/circresaha.118.313565] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 07/26/2018] [Indexed: 01/16/2023]
Abstract
RATIONALE A strong association has emerged between the gut microbiome and atherosclerotic disease. Our recent data suggest Lactobacillus plantarum 299v (Lp299v) supplementation reduces infarct size in male rats. Limited human data are available on the impact of Lp299v on the vasculature. OBJECTIVE To determine whether oral Lp299v supplementation improves vascular endothelial function and reduces systemic inflammation in humans with stable coronary artery disease (CAD). METHODS AND RESULTS Twenty men with stable CAD consumed a drink containing Lp299v (20 billion CFU) once daily for 6 weeks. After a 4-week washout, subjects were given an option of additionally participating in a 10-day study of oral liquid vancomycin (250 mg QID). Vascular endothelial function was measured by brachial artery flow-mediated dilation. Before and after Lp299v, plasma short-chain fatty acids, trimethylamine oxide, and adipokine levels were measured. Additional plasma samples underwent unbiased metabolomic analyses using liquid chromatography/mass spectroscopy. 16S rRNA sequencing was used to determine changes of the stool microbiome. Arterioles from patients with CAD were obtained, and endothelium-dependent vasodilation was measured by video microscopy after intraluminal incubation with plasma from Lp299v study subjects. Lp299v supplementation improved brachial flow-mediated dilation ( P=0.008) without significant changes in plasma cholesterol profiles, fasting glucose, or body mass index. Vancomycin did not impact flow-mediated dilation. Lp299v supplementation decreased circulating levels of IL (interleukin)-8 ( P=0.01), IL-12 ( P=0.02), and leptin ( P=0.0007) but did not significantly change plasma trimethylamine oxide concentrations ( P=0.27). Plasma propionate ( P=0.004) increased, whereas acetate levels decreased ( P=0.03). Post-Lp299v plasma improved endothelium-dependent vasodilation in resistance arteries from patients with CAD ( P=0.02).16S rRNA analysis showed the Lactobacillus genus was enriched in postprobiotic stool samples without other changes. CONCLUSIONS Lp299v improved vascular endothelial function and decreased systemic inflammation in men with CAD, independent of changes in traditional risk factors and trimethylamine oxide. Circulating gut-derived metabolites likely account for these improvements and merit further study. CLINICAL TRIAL REGISTRATION URL: http://www.clinicaltrials.gov . Unique identifier: NCT01952834.
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Affiliation(s)
- Mobin Malik
- Department of Medicine, Division of Cardiovascular Medicine, Milwaukee, WI, USA
| | - Tisha M. Suboc
- Department of Medicine, Division of Cardiovascular Medicine, Milwaukee, WI, USA
| | - Sudhi Tyagi
- Department of Medicine, Division of Cardiovascular Medicine, Milwaukee, WI, USA
| | - Nita Salzman
- Departments of Pediatrics and Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jingli Wang
- Department of Medicine, Division of Cardiovascular Medicine, Milwaukee, WI, USA
| | - Rong Ying
- Department of Medicine, Division of Cardiovascular Medicine, Milwaukee, WI, USA
| | - Michael J. Tanner
- Department of Medicine, Division of Cardiovascular Medicine, Milwaukee, WI, USA
| | - Mamatha Kakarla
- Department of Medicine, Division of Cardiovascular Medicine, Milwaukee, WI, USA
| | - John E. Baker
- Department of Surgery, Division of Congenital Cardiac Surgery and Department of Pharmacology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Michael E. Widlansky
- Department of Medicine, Division of Cardiovascular Medicine and Department of Pharmacology, Medical College of Wisconsin, Milwaukee, WI, USA
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The asthma-obesity relationship: underlying mechanisms and treatment implications. Curr Opin Pulm Med 2018; 24:42-49. [PMID: 29176481 DOI: 10.1097/mcp.0000000000000446] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE OF REVIEW Obesity is a worldwide epidemic with a prevalence that has tripled in the last two decades. Worldwide, more than 1.5 billion adults are overweight and more than 500 million obese. Obesity has been suggested to be a risk factor for the development of more difficult-to-control asthma. Although the mechanisms underlying the asthma-obesity relationship are not fully understood, several possible explanations have been put forward. These will be reviewed in this manuscript as well as the implications for the treatment of overweight and obese asthma patients. RECENT FINDINGS Insulin resistance is a possible factor contributing to the asthma-obesity relationship and the effect is independent of other components of the metabolic syndrome such as hypertriglyceridemia, hypertension, hyperglycemia, and systemic inflammation. Obesity has important effects on airway geometry, by especially reducing expiratory reserve volume causing obese asthmatics to breathe at low lung volumes. Furthermore, obesity affects the type of inflammation in asthma and is associated with reduced inhaled corticosteroids treatment responsiveness. SUMMARY Obesity induces the development of asthma with a difficult-to-control phenotype. Treatment targeting insulin resistance may be beneficial in obese asthma patients, especially when they have concomitant diabetes. Systemic corticosteroids should be avoided as much as possible as they are not very effective in obese asthma and associated with side-effects like diabetes, weight gain, and osteoporosis.
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Intrauterine Malnutrition Reduced Long Leptin Receptor Isoform Expression and Proinflammatory Cytokine Production in Male Rat Pulmonary Endothelial Cells Stimulated by Lipopolysaccharide. Mediators Inflamm 2018; 2018:8597361. [PMID: 30116155 PMCID: PMC6079436 DOI: 10.1155/2018/8597361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/08/2018] [Accepted: 05/27/2018] [Indexed: 12/26/2022] Open
Abstract
Background/Aims We have previously shown that low birth weight (LBW) rats exposed to intrauterine malnutrition have an impaired lung inflammatory response and reduced levels of inflammatory mediators; however, circulating leptin levels were not increased. We evaluated long leptin receptor isoform (ObRb) expression in lung endothelial cells from low birth weight rats and examined its role in the production of lipid mediators and cytokines. Methods Lung endothelial cells were obtained from normal birth weight (NBW) rats or LBW rats subjected to intrauterine malnutrition. These cells were stimulated with leptin (10 ng/mL), LPS (lipopolysaccharide, 1 μg/mL), or leptin plus LPS. Six hours after stimulation, the production of inflammatory mediators (PGE2, LTB4, IL-1β, and IL-6) was evaluated using commercial ELISA kits, and Western blotting was performed to investigate p38MAPK, NF-κB, and ObRb expression. Results Leptin increased IL-1β levels in only cells from the NBW group, whereas LPS increased PGE2 and LTB4 levels in cells from both groups; leptin addition potentiated lipid mediator production induced by LPS in the NBW group. LPS enhanced the production of IL-1β and IL-6 in only endothelial cells from NBW rats. Leptin receptor expression was decreased (63%) in endothelial cells from LBW rats. None of the stimuli increased NF-κB or p38 signaling pathway expression in cells from LBW rats. Conclusion These results suggest that intrauterine malnutrition compromises leptin receptor expression and cytokine production in pulmonary endothelial cells stimulated by LPS; these effects seem to involve the NF-κB and p38MAPK signaling pathways.
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Crean-Tate KK, Reizes O. Leptin Regulation of Cancer Stem Cells in Breast and Gynecologic Cancer. Endocrinology 2018; 159:3069-3080. [PMID: 29955847 PMCID: PMC6669812 DOI: 10.1210/en.2018-00379] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 06/19/2018] [Indexed: 12/18/2022]
Abstract
It is well established that obesity increases the incidence and worsens the prognosis of women's cancer. For breast cancer, women with obesity exhibit more than a twofold increase in the odds of being diagnosed with cancer, with a greater risk of advanced stage at diagnosis, and ≤40% greater risk of recurrence and death than their normal-weight counterparts. These findings are similar in gynecologic cancers, where women who are obese with a body mass index (BMI) >40 kg/m2 have up to six times greater risk of developing endometrial cancer and a 9.2% increase in mortality with every 10% increase in BMI. Likewise, patients with obesity exhibit a twofold higher risk of premenopausal ovarian cancer, and patients who are obese with advanced stage ovarian cancer have shown a shorter time to recurrence and poorer overall survival. Obesity is accompanied by changes in expression of adipose factors that act on local tissues and systemically. Once obesity was recognized as a factor in cancer incidence and progression, the adipose cytokine (adipokine) leptin became the focus of intense investigation as a putative link, with nearly 3000 publications on the topic. Leptin has been shown to increase cell proliferation, inhibit apoptosis, promote angiogenesis, and increase therapeutic resistance. These characteristics are associated with a subset of cells in both liquid and solid tumors known as cancer stem cells (CSCs), or tumor initiating cells. We will review the literature discussing leptin's role in breast and gynecologic cancer, focusing on its role in CSCs, and consider goals for targeting future therapy in this arena to disrupt tumor initiation and progression in women's cancer.
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Affiliation(s)
- Katie K Crean-Tate
- Department of Obstetrics and Gynecology, Women’s Health Institute, Cleveland Clinic, Cleveland, Ohio
| | - Ofer Reizes
- Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
- Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, Ohio
- Case Comprehensive Cancer Center, Cleveland, Ohio
- Correspondence: Ofer Reizes, PhD, Department of Cellular and Molecular Medicine, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, NC10, Cleveland, Ohio 44195. E-mail:
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Association of inflammatory genes in obstructive sleep apnea and non alcoholic fatty liver disease in Asian Indians residing in north India. PLoS One 2018; 13:e0199599. [PMID: 30001365 PMCID: PMC6042717 DOI: 10.1371/journal.pone.0199599] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 06/11/2018] [Indexed: 01/03/2023] Open
Abstract
Background Previous studies have indicated that variants of the high sensitive C-reactive protein (CRP), Interleukin (IL)-6 and leptin receptor (LEPR) genes are associated with the presence of obstructive sleep apnea (OSA) but not in non-alcoholic fatty liver disease (NAFLD) in Asian Indians. The study was conducted to investigate the association of CRP rs1130864 (1444C/T), IL-6 rs1800795 (-174G/C) and LEPR rs1137101 (Q223R) genes with OSA and NAFLD in Asian Indians residing in North India. Methods 240 overweight/ obese subjects [body mass index (BMI>23kg/m2)], 124 with OSA and with NAFLD (group 1), 47 with OSA without NAFLD (group 2), 44 without OSA and with NAFLD (group 3) and 25 without OSA and without NAFLD (group 4) were recruited in this study. The severity of NAFLD was based on abdomen liver ultrasound and of OSA on overnight polysomnography. Clinical details, anthropometry profile, body composition, biochemical parameters and inflammatory markers were measured. Polymerase chain reaction and restriction fragment length polymorphism of CRP, IL-6 and LEPR gene was performed. The associations of these polymorphisms with clinical, anthropometric and biochemical profiles were investigated. The genotypes were confirmed by DNA sequencing analysis. Results The C, T and R alleles of IL-6, CRP and LEPR genes was more frequent in OSA and NAFLD subjects and significantly correlated with higher protein levels. The prevalence of variant genotypes C/T of CRP, G/C of IL-6 and Q/R of LEPR genes was significantly higher in OSA subjects as compared to non OSA subjects. Further, C/C genotype of IL-6 (G/C), T/T of CRP (C/T) and RR genotype of LEPR (Q/R) was associated with significantly higher BMI, fat mass (kg), % body fat, waist circumference, serum triglycerides, total cholesterol, alkaline phosphate, aspartate transaminase and fasting insulin levels in OSA and NAFLD subjects. Using a multivariate analysis, the combined effect of three polymorphisms of CRP, IL-6 and LEPR gene variants on OSA and NAFLD risk was evaluated. Odds ratio for OSA and NAFLD with the combination of the three gene polymorphisms increased to 2.84 (95% CI: 1.08–6.54; p = 0.04) even when adjusted for sex, age and BMI. Conclusion Polymorphisms of pro-inflammatory cytokine genes were associated with increased risk of OSA and NAFLD in Asian Indians.
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Francisco V, Pino J, Campos-Cabaleiro V, Ruiz-Fernández C, Mera A, Gonzalez-Gay MA, Gómez R, Gualillo O. Obesity, Fat Mass and Immune System: Role for Leptin. Front Physiol 2018; 9:640. [PMID: 29910742 PMCID: PMC5992476 DOI: 10.3389/fphys.2018.00640] [Citation(s) in RCA: 240] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 05/11/2018] [Indexed: 12/13/2022] Open
Abstract
Obesity is an epidemic disease characterized by chronic low-grade inflammation associated with a dysfunctional fat mass. Adipose tissue is now considered an extremely active endocrine organ that secretes cytokine-like hormones, called adipokines, either pro- or anti-inflammatory factors bridging metabolism to the immune system. Leptin is historically one of most relevant adipokines, with important physiological roles in the central control of energy metabolism and in the regulation of metabolism-immune system interplay, being a cornerstone of the emerging field of immunometabolism. Indeed, leptin receptor is expressed throughout the immune system and leptin has been shown to regulate both innate and adaptive immune responses. This review discusses the latest data regarding the role of leptin as a mediator of immune system and metabolism, with particular emphasis on its effects on obesity-associated metabolic disorders and autoimmune and/or inflammatory rheumatic diseases.
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Affiliation(s)
- Vera Francisco
- The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Servizo Galego de Saude and Instituto de Investigación Sanitaria de Santiago, Santiago University Clinical Hospital, Santiago de Compostela, Spain
| | - Jesús Pino
- The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Servizo Galego de Saude and Instituto de Investigación Sanitaria de Santiago, Santiago University Clinical Hospital, Santiago de Compostela, Spain
| | - Victor Campos-Cabaleiro
- The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Servizo Galego de Saude and Instituto de Investigación Sanitaria de Santiago, Santiago University Clinical Hospital, Santiago de Compostela, Spain
| | - Clara Ruiz-Fernández
- The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Servizo Galego de Saude and Instituto de Investigación Sanitaria de Santiago, Santiago University Clinical Hospital, Santiago de Compostela, Spain
| | - Antonio Mera
- Servizo Galego de Saude, Division of Rheumatology, Santiago University Clinical Hospital, Santiago de Compostela, Spain
| | - Miguel A Gonzalez-Gay
- Epidemiology, Genetics and Atherosclerosis Research Group on Systemic Inflammatory Diseases, Hospital Universitario Marqués de Valdecilla, Universidad de Cantabria and IDIVAL, Santander, Spain
| | - Rodolfo Gómez
- Musculoskeletal Pathology Group, Servizo Galego de Saude and Instituto de Investigación Sanitaria de Santiago, Santiago University Clinical Hospital, Santiago de Compostela, Spain
| | - Oreste Gualillo
- The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Servizo Galego de Saude and Instituto de Investigación Sanitaria de Santiago, Santiago University Clinical Hospital, Santiago de Compostela, Spain
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Alti D, Sambamurthy C, Kalangi SK. Emergence of Leptin in Infection and Immunity: Scope and Challenges in Vaccines Formulation. Front Cell Infect Microbiol 2018; 8:147. [PMID: 29868503 PMCID: PMC5954041 DOI: 10.3389/fcimb.2018.00147] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 04/20/2018] [Indexed: 01/01/2023] Open
Abstract
Deficiency of leptin (ob/ob) and/or desensitization of leptin signaling (db/db) and elevated expression of suppressor of cytokine signaling-3 (SOCS3) reported in obesity are also reported in a variety of pathologies including hypertriglyceridemia, insulin resistance, and malnutrition as the risk factors in host defense system. Viral infections cause the elevated SOCS3 expression, which inhibits leptin signaling. It results in immunosuppression by T-regulatory cells (Tregs). The host immunity becomes incompetent to manage pathogens' attack and invasion, which results in the accelerated infections and diminished vaccine-specific antibody response. Leptin was successfully used as mucosal vaccine adjuvant against Rhodococcus equi. Leptin induced the antibody response to Helicobacter pylori vaccination in mice. An integral leptin signaling in mucosal gut epithelial cells offered resistance against Clostridium difficile and Entameoba histolytica infections. We present in this review, the intervention of leptin in lethal diseases caused by microbial infections and propose the possible scope and challenges of leptin as an adjuvant tool in the development of effective vaccines.
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Affiliation(s)
- Dayakar Alti
- School of Life Sciences, University of Hyderabad, Hyderabad, India
| | | | - Suresh K Kalangi
- School of Life Sciences, University of Hyderabad, Hyderabad, India
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La Cava A. Leptin in inflammation and autoimmunity. Cytokine 2018; 98:51-58. [PMID: 27916613 DOI: 10.1016/j.cyto.2016.10.011] [Citation(s) in RCA: 204] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 10/18/2016] [Accepted: 10/19/2016] [Indexed: 12/11/2022]
Abstract
After its discovery as a key controller of metabolic function, leptin has been later extensively implicated in additional functions including important modulatory activities on the innate and adaptive immune response. This review analyzes the known implications of leptin in multiple inflammatory conditions, including autoimmune diseases, and how this knowledge could be instrumental in the design of leptin-based manipulation strategies to help restoration of abnormal immune responses.
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Affiliation(s)
- Antonio La Cava
- Department of Medicine, University of California Los Angeles, 1000 Veteran Ave. 32-59, Los Angeles, CA 90095, United States.
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Abstract
The frequency of prediabetes is increasing as the prevalence of obesity rises worldwide. In prediabetes, hyperglycemia, insulin resistance, and inflammation and metabolic derangements associated with concomitant obesity cause endothelial vasodilator and fibrinolytic dysfunction, leading to increased risk of cardiovascular and renal disease. Importantly, the microvasculature affects insulin sensitivity by affecting the delivery of insulin and glucose to skeletal muscle; thus, endothelial dysfunction and extracellular matrix remodeling promote the progression from prediabetes to diabetes mellitus. Weight loss is the mainstay of treatment in prediabetes, but therapies that improved endothelial function and vasodilation may not only prevent cardiovascular disease but also slow progression to diabetes mellitus.
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Affiliation(s)
- David H Wasserman
- From the Departments of Molecular Physiology and Biophysics (D.H.W.) and Medicine (T.J.W., N.J.B.), Vanderbilt University Medical Center, Nashville, TN
| | - Thomas J Wang
- From the Departments of Molecular Physiology and Biophysics (D.H.W.) and Medicine (T.J.W., N.J.B.), Vanderbilt University Medical Center, Nashville, TN
| | - Nancy J Brown
- From the Departments of Molecular Physiology and Biophysics (D.H.W.) and Medicine (T.J.W., N.J.B.), Vanderbilt University Medical Center, Nashville, TN.
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Methylglyoxal-bis-guanylhydrazone inhibits osteopontin expression and differentiation in cultured human monocytes. PLoS One 2018. [PMID: 29538412 PMCID: PMC5851547 DOI: 10.1371/journal.pone.0192680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Monocyte activation and polarization play essential roles in many chronic inflammatory diseases. An imbalance of M1 and M2 macrophage activation (pro-inflammatory and alternatively activated, respectively) is believed to be a key aspect in the etiology of these diseases, thus a therapeutic approach that regulates macrophage activation could be of broad clinical relevance. Methylglyoxal-bis-guanylhydrazone (MGBG), a regulator of polyamine metabolism, has recently been shown to be concentrated in monocytes and macrophages, and interfere with HIV integration into the DNA of these cells in vitro. RNA expression analysis of monocytes from HIV+ and control donors with or without MGBG treatment revealed the only gene to be consistently down regulated by MGBG to be osteopontin (OPN). The elevated expression of this pro-inflammatory cytokine and monocyte chemoattractant is associated with various chronic inflammatory diseases. We demonstrate that MGBG is a potent inhibitor of secreted OPN (sOPN) in cultured monocytes with 50% inhibition achieved at 0.1 μM of the drug. Furthermore, inhibition of OPN RNA transcription in monocyte cultures occurs at similar concentrations of the drug. During differentiation of monocytes into macrophages in vitro, monocytes express cell surface CD16 and the cells undergo limited DNA synthesis as measured by uptake of BrdU. MGBG inhibited both activities at similar doses to those regulating OPN expression. In addition, monocyte treatment with MGBG inhibited differentiation into both M1 and M2 classes of macrophages at non-toxic doses. The inhibition of differentiation and anti-OPN effects of MGBG were specific for monocytes in that differentiated macrophages were nearly resistant to MGBG activities. Thus MGBG may have potential therapeutic utility in reducing or normalizing OPN levels and regulating monocyte activation in diseases that involve chronic inflammation.
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Lo CW, Chen CS, Chen YC, Hsu YA, Huang CC, Chang CY, Lin CJ, Lin CW, Lin HJ, Liu FT, Wan L. Allyl Isothiocyanate Ameliorates Obesity by Inhibiting Galectin-12. Mol Nutr Food Res 2018; 62:e1700616. [PMID: 29345776 DOI: 10.1002/mnfr.201700616] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 01/06/2018] [Indexed: 11/11/2022]
Abstract
SCOPE The aim of this study is to investigate the signaling pathways by which allyl isothiocyanate (AITC) reduces adipocyte differentiation and the efficacy of AITC in suppressing galectin-12 levels as a therapeutic for high fat diet (HFD)-induced obesity. METHODS AND RESULTS AITC presents anti-adipogenic effects on 3T3-L1 cells by decreasing lipid droplet accumulation in a dose-dependent manner. AITC suppresses 3T3-L1 differentiation into adipocytes by decreasing galectin-12 expression and by downregulating key adipogenic transcription factors. AITC influences the expression of 3T3-L1 pre-adipocytes by modulating adipokine expression (leptin and resistin) and by regulating the protein kinase B (PKB/Akt)/cAMP response element-binding protein (CREB) pathway. In HFD-fed mice, oral administration of AITC reduces the body weight, accumulation of lipid droplets in the liver, and white adipocyte size. CONCLUSION In summary, the results indicate that AITC inhibits adipocyte differentiation by suppressing galectin-12 levels in 3T3L1 cells and has antiobesity effects in HFD-fed mice.
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Affiliation(s)
- Chia-Wen Lo
- School of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Chih-Sheng Chen
- Graduate Institute of Chinese Medicine, China Medical University, Taichung, Taiwan.,Division of Chinese Traumatology, China Medical University Hospital, Taichung, Taiwan.,Division of Chinese Medicine, Asia University Hospital, Taichung, Taiwan
| | - Ying-Chi Chen
- Department of Biomedical Science, Bonn-Rhein-Sieg University of Applied Science, Rheinbach, Germany
| | - Yu-An Hsu
- School of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Chi-Chun Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Ching-Yao Chang
- Department of Biotechnology, Asia University, Taichung, Taiwan
| | - Chao-Jen Lin
- Department of Pediatrics, Changhua Christian Children's Hospital, Changhua, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan
| | - Hui-Ju Lin
- Department of Ophthalmology, China Medical University Hospital, Taichung, Taiwan.,Department of Dermatology, University of California, Davis, School of Medicine, Sacramento, California
| | - Fu-Tong Liu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Department of Dermatology, University of California, Davis, School of Medicine, Sacramento, California
| | - Lei Wan
- School of Chinese Medicine, China Medical University, Taichung, Taiwan.,Department of Biotechnology, Asia University, Taichung, Taiwan.,Department of Obstetrics and Gynecology, China Medical University Hospital, Taichung, Taiwan.,Research Center for Chinese Medicine & Acupuncture, China Medical University, Taichung, Taiwan
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Collins KH, Herzog W, MacDonald GZ, Reimer RA, Rios JL, Smith IC, Zernicke RF, Hart DA. Obesity, Metabolic Syndrome, and Musculoskeletal Disease: Common Inflammatory Pathways Suggest a Central Role for Loss of Muscle Integrity. Front Physiol 2018; 9:112. [PMID: 29527173 PMCID: PMC5829464 DOI: 10.3389/fphys.2018.00112] [Citation(s) in RCA: 153] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/05/2018] [Indexed: 01/14/2023] Open
Abstract
Inflammation can arise in response to a variety of stimuli, including infectious agents, tissue injury, autoimmune diseases, and obesity. Some of these responses are acute and resolve, while others become chronic and exert a sustained impact on the host, systemically, or locally. Obesity is now recognized as a chronic low-grade, systemic inflammatory state that predisposes to other chronic conditions including metabolic syndrome (MetS). Although obesity has received considerable attention regarding its pathophysiological link to chronic cardiovascular conditions and type 2 diabetes, the musculoskeletal (MSK) complications (i.e., muscle, bone, tendon, and joints) that result from obesity-associated metabolic disturbances are less frequently interrogated. As musculoskeletal diseases can lead to the worsening of MetS, this underscores the imminent need to understand the cause and effect relations between the two, and the convergence between inflammatory pathways that contribute to MSK damage. Muscle mass is a key predictor of longevity in older adults, and obesity-induced sarcopenia is a significant risk factor for adverse health outcomes. Muscle is highly plastic, undergoes regular remodeling, and is responsible for the majority of total body glucose utilization, which when impaired leads to insulin resistance. Furthermore, impaired muscle integrity, defined as persistent muscle loss, intramuscular lipid accumulation, or connective tissue deposition, is a hallmark of metabolic dysfunction. In fact, many common inflammatory pathways have been implicated in the pathogenesis of the interrelated tissues of the musculoskeletal system (e.g., tendinopathy, osteoporosis, and osteoarthritis). Despite these similarities, these diseases are rarely evaluated in a comprehensive manner. The aim of this review is to summarize the common pathways that lead to musculoskeletal damage and disease that result from and contribute to MetS. We propose the overarching hypothesis that there is a central role for muscle damage with chronic exposure to an obesity-inducing diet. The inflammatory consequence of diet and muscle dysregulation can result in dysregulated tissue repair and an imbalance toward negative adaptation, resulting in regulatory failure and other musculoskeletal tissue damage. The commonalities support the conclusion that musculoskeletal pathology with MetS should be evaluated in a comprehensive and integrated manner to understand risk for other MSK-related conditions. Implications for conservative management strategies to regulate MetS are discussed, as are future research opportunities.
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Affiliation(s)
- Kelsey H. Collins
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Walter Herzog
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
| | - Graham Z. MacDonald
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Raylene A. Reimer
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, AB, Canada
| | - Jaqueline L. Rios
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
- CAPES Foundation, Brasilia, Brazil
| | - Ian C. Smith
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
| | - Ronald F. Zernicke
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- Departments of Orthopaedic Surgery and Biomedical Engineering, School of Kinesiology, University of Michigan, Ann Arbor, MI, United States
- Department of Surgery, Department of Physiology and Pharmacology, University of Calgary, Calgary, AB, Canada
| | - David A. Hart
- Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, AB, Canada
- Department of Family Practice, The Centre for Hip Health and Mobility, University of British Columbia, Vancouver, BC, Canada
- Alberta Health Services Bone and Joint Health Strategic Clinical Network, Calgary, AB, Canada
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127
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Pérez‐Pérez A, Toro A, Vilariño‐García T, Maymó J, Guadix P, Dueñas JL, Fernández‐Sánchez M, Varone C, Sánchez‐Margalet V. Leptin action in normal and pathological pregnancies. J Cell Mol Med 2018; 22:716-727. [PMID: 29160594 PMCID: PMC5783877 DOI: 10.1111/jcmm.13369] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 07/10/2017] [Indexed: 12/11/2022] Open
Abstract
Leptin is now considered an important signalling molecule of the reproductive system, as it regulates the production of gonadotrophins, the blastocyst formation and implantation, the normal placentation, as well as the foeto-placental communication. Leptin is a peptide hormone secreted mainly by adipose tissue, and the placenta is the second leptin-producing tissue in humans. Placental leptin is an important cytokine which regulates placental functions in an autocrine or paracrine manner. Leptin seems to play a crucial role during the first stages of pregnancy as it modulates critical processes such as proliferation, protein synthesis, invasion and apoptosis in placental cells. Furthermore, deregulation of leptin levels has been correlated with the pathogenesis of various disorders associated with reproduction and gestation, including polycystic ovary syndrome, recurrent miscarriage, gestational diabetes mellitus, pre-eclampsia and intrauterine growth restriction. Due to the relevant incidence of the mentioned diseases and the importance of leptin, we decided to review the latest information available about leptin action in normal and pathological pregnancies to support the idea of leptin as an important factor and/or predictor of diverse disorders associated with reproduction and pregnancy.
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Affiliation(s)
- Antonio Pérez‐Pérez
- Department of Medical Biochemistry and Molecular BiologyVirgen Macarena University HospitalUniversity of SevilleSevilleSpain
| | - Ayelén Toro
- Laboratory of Placental Molecular PhysiologyDepartment of Biological ChemistrySchool of SciencesUniversity of Buenos AiresIQUIBICEN‐CONICETBuenos AiresArgentina
| | - Teresa Vilariño‐García
- Department of Medical Biochemistry and Molecular BiologyVirgen Macarena University HospitalUniversity of SevilleSevilleSpain
| | - Julieta Maymó
- Laboratory of Placental Molecular PhysiologyDepartment of Biological ChemistrySchool of SciencesUniversity of Buenos AiresIQUIBICEN‐CONICETBuenos AiresArgentina
| | - Pilar Guadix
- Department of Obstetrics and GynecologyVirgen Macarena University HospitalUniversity of SevilleSevilleSpain
| | - José L. Dueñas
- Department of Obstetrics and GynecologyVirgen Macarena University HospitalUniversity of SevilleSevilleSpain
| | | | - Cecilia Varone
- Laboratory of Placental Molecular PhysiologyDepartment of Biological ChemistrySchool of SciencesUniversity of Buenos AiresIQUIBICEN‐CONICETBuenos AiresArgentina
| | - Víctor Sánchez‐Margalet
- Department of Medical Biochemistry and Molecular BiologyVirgen Macarena University HospitalUniversity of SevilleSevilleSpain
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128
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Alexandrakis MG, Passam FH, Sfiridaki A, Pappa CA, Moschandrea JA, Kandidakis E, Tsirakis G, Kyriakou DS. Serum Levels of Leptin in Multiple Myeloma Patients and Its Relation to Angiogenic and Inflammatory Cytokines. Int J Biol Markers 2018; 19:52-7. [PMID: 15077927 DOI: 10.1177/172460080401900107] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background Leptin, apart from the regulation of food intake, has been implicated in hematopoiesis, the immune response and angiogenesis. Leptin has been found to be decreased in various hematological malignancies. In the present study leptin was measured in multiple myeloma (MM) patients before and after treatment and correlated with other angiogenic molecules and markers of disease activity. Methods Serum leptin, vascular endothelial growth factor (VEGF), basic fibroblast growth factor (b-FGF), interleukin-1 beta (IL-1β), beta 2 microglobulin (β2M) and C-reactive protein (CRP) were measured in 62 newly diagnosed MM patients, 22 of whom obtaining disease stabilization after treatment. The same parameters were measured in 20 healthy controls. Disease stage was defined according to the Durie-Salmon criteria. Results Leptin, VEGF, b-FGF, IL-1β, and β2M were significantly higher in newly diagnosed MM patients than in controls (p<0.05). VEGF, b-FGF, IL-1β, β2M, CRP but not leptin increased with advancing stage of disease (p<0.01). All parameters decreased significantly following treatment (p<0.001). Although IL-1β correlated positively with VEGF, β2M, b-FGF and CRP, leptin did not correlate with any of the measured parameters. Conclusion Leptin serum levels do not reflect disease severity in MM. However, there seems to be a decrease in leptin following treatment, which may be associated with an alteration in the metabolic state or the chemokine milieu.
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Affiliation(s)
- M G Alexandrakis
- Division of Medicine, University Hospital of Heraklion, Medical School of Crete, Greece
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129
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Li HM, Zhang TP, Leng RX, Li XP, Li XM, Liu HR, Ye DQ, Pan HF. Emerging role of adipokines in systemic lupus erythematosus. Immunol Res 2017; 64:820-30. [PMID: 27314594 DOI: 10.1007/s12026-016-8808-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Systemic lupus erythematosus (SLE) is a chronic autoimmune disorder characterized by multisystem organ involvement and unclear pathogenesis. Several adipokines synthesized in the adipose tissue, including leptin, adiponectin, resistin, and chemerin, have been explored in autoimmune rheumatic diseases, especially SLE, and results suggest that these mediators may be implicated in the pathogenesis of SLE. However, the current results are controversial. In this review, we will briefly discuss the expression and possible pathogenic role of several important adipokines, including leptin, adiponectin, resistin, and chemerin in SLE.
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Affiliation(s)
- Hong-Miao Li
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China.,Anhui Provincial Laboratory of Population Health and Major Disease Screening and Diagnosis, Hefei, People's Republic of China
| | - Tian-Ping Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China.,Anhui Provincial Laboratory of Population Health and Major Disease Screening and Diagnosis, Hefei, People's Republic of China
| | - Rui-Xue Leng
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China.,Anhui Provincial Laboratory of Population Health and Major Disease Screening and Diagnosis, Hefei, People's Republic of China
| | - Xiang-Pei Li
- Department of Rheumatology, Anhui Provincial Hospital, Hefei, People's Republic of China
| | - Xiao-Mei Li
- Department of Rheumatology, Anhui Provincial Hospital, Hefei, People's Republic of China
| | - Hai-Rong Liu
- Graduate School, Wannan Medical College, West of Wenchang Road, University Park, Wuhu, 241002, Anhui, People's Republic of China
| | - Dong-Qing Ye
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China.,Anhui Provincial Laboratory of Population Health and Major Disease Screening and Diagnosis, Hefei, People's Republic of China
| | - Hai-Feng Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China. .,Anhui Provincial Laboratory of Population Health and Major Disease Screening and Diagnosis, Hefei, People's Republic of China.
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130
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Integrated Immunomodulatory Mechanisms through which Long-Chain n-3 Polyunsaturated Fatty Acids Attenuate Obese Adipose Tissue Dysfunction. Nutrients 2017; 9:nu9121289. [PMID: 29186929 PMCID: PMC5748740 DOI: 10.3390/nu9121289] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/14/2017] [Accepted: 11/16/2017] [Indexed: 12/13/2022] Open
Abstract
Obesity is a global health concern with rising prevalence that increases the risk of developing other chronic diseases. A causal link connecting overnutrition, the development of obesity and obesity-associated co-morbidities is visceral adipose tissue (AT) dysfunction, characterized by changes in the cellularity of various immune cell populations, altered production of inflammatory adipokines that sustain a chronic state of low-grade inflammation and, ultimately, dysregulated AT metabolic function. Therefore, dietary intervention strategies aimed to halt the progression of obese AT dysfunction through any of the aforementioned processes represent an important active area of research. In this connection, fish oil-derived dietary long-chain n-3 polyunsaturated fatty acids (PUFA) in the form of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) have been demonstrated to attenuate obese AT dysfunction through multiple mechanisms, ultimately affecting AT immune cellularity and function, adipokine production, and metabolic signaling pathways, all of which will be discussed herein.
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131
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Graßmann S, Wirsching J, Eichelmann F, Aleksandrova K. Association Between Peripheral Adipokines and Inflammation Markers: A Systematic Review and Meta-Analysis. Obesity (Silver Spring) 2017; 25:1776-1785. [PMID: 28834421 DOI: 10.1002/oby.21945] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 06/21/2017] [Accepted: 06/22/2017] [Indexed: 01/13/2023]
Abstract
OBJECTIVE Obesity-induced inflammation potentially promotes a variety of chronic conditions. This study aimed to summarize cross-sectional associations between adipose tissue-derived hormones (leptin and adiponectin) and inflammatory biomarkers (C-reactive protein [CRP], interleukin [IL]-6, and tumor necrosis factor [TNF]-α) by means of meta-analysis. METHODS A systematic search of the databases EMBASE and MEDLINE (PubMed) up to January 2017 was conducted. Data were independently extracted and evaluated by two reviewers. Pooled effect sizes and 95% confidence intervals were calculated using random-effects models. RESULTS After the initial search, 5,907 publications were retrieved; of these, an overall 60 studies with 45,210 participants were deemed eligible for inclusion in the meta-analysis. Positive correlations with inflammatory biomarkers were observed for leptin (pooled Rho = 0.35, 0.20, and 0.20 for CRP, IL-6, and TNF-α, respectively), whereas the respective correlations with adiponectin were negative (pooled Rho = -0.18, -0.14, and -0.12 for CRP, IL-6, and TNF-α, respectively). Stratification by age showed that the observed correlations tended to be weaker with the increasing age of participants. No apparent differences were observed by sex and adiposity status. CONCLUSIONS This is the first quantitative synthesis of human studies on the association between circulating adipokines and inflammation biomarkers. Potential influence of age on these associations requires further evaluation.
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Affiliation(s)
- Sophie Graßmann
- Nutrition, Immunity and Metabolism Start-up Lab, Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Jan Wirsching
- Nutrition, Immunity and Metabolism Start-up Lab, Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Fabian Eichelmann
- Nutrition, Immunity and Metabolism Start-up Lab, Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
| | - Krasimira Aleksandrova
- Nutrition, Immunity and Metabolism Start-up Lab, Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
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132
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Becker M, Levings MK, Daniel C. Adipose-tissue regulatory T cells: Critical players in adipose-immune crosstalk. Eur J Immunol 2017; 47:1867-1874. [PMID: 28849586 DOI: 10.1002/eji.201646739] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/13/2017] [Accepted: 08/24/2017] [Indexed: 12/19/2022]
Abstract
Obesity and type-2 diabetes (T2D) are associated with metabolic defects and inflammatory processes in fat depots. FoxP3+ regulatory T cells (Tregs) control immune tolerance, and have an important role in controlling tissue-specific inflammation. In this mini-review we will discuss current insights into how cross-talk between T cells and adipose tissue shapes the inflammatory environment in obesity-associated metabolic diseases, focusing on the role of CD4+ T cells and Tregs. We will also highlight potential opportunities for how the immunoregulatory properties of Tregs could be harnessed to control inflammation in obesity and T2D and emphasize the critical need for more research on humans to establish mechanisms that are conserved in both mice and humans.
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Affiliation(s)
- Maike Becker
- Institute for Diabetes Research, Research Group Immune Tolerance in Diabetes, Helmholtz Diabetes Center at Helmholtz Zentrum München, Munich, Germany.,Deutsches Zentrum für Diabetesforschung (DZD), Munich, Germany
| | - Megan K Levings
- Department of Surgery University of British Columbia and BC Children's Hospital Research Institute, Vancouver, B.C. Canada
| | - Carolin Daniel
- Institute for Diabetes Research, Research Group Immune Tolerance in Diabetes, Helmholtz Diabetes Center at Helmholtz Zentrum München, Munich, Germany.,Deutsches Zentrum für Diabetesforschung (DZD), Munich, Germany
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133
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Frasca D, Blomberg BB. Adipose Tissue Inflammation Induces B Cell Inflammation and Decreases B Cell Function in Aging. Front Immunol 2017; 8:1003. [PMID: 28894445 PMCID: PMC5581329 DOI: 10.3389/fimmu.2017.01003] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 08/04/2017] [Indexed: 12/22/2022] Open
Abstract
Aging is the greatest risk factor for developing chronic diseases. Inflamm-aging, the age-related increase in low-grade chronic inflammation, may be a common link in age-related diseases. This review summarizes recent published data on potential cellular and molecular mechanisms of the age-related increase in inflammation, and how these contribute to decreased humoral immune responses in aged mice and humans. Briefly, we cover how aging and related inflammation decrease antibody responses in mice and humans, and how obesity contributes to the mechanisms for aging through increased inflammation. We also report data in the literature showing adipose tissue infiltration with immune cells and how these cells are recruited and contribute to local and systemic inflammation. We show that several types of immune cells infiltrate the adipose tissue and these include macrophages, neutrophils, NK cells, innate lymphoid cells, eosinophils, T cells, B1, and B2 cells. Our main focus is how the adipose tissue affects immune responses, in particular B cell responses and antibody production. The role of leptin in generating inflammation and decreased B cell responses is also discussed. We report data published by us and by other groups showing that the adipose tissue generates pro-inflammatory B cell subsets which induce pro-inflammatory T cells, promote insulin resistance, and secrete pathogenic autoimmune antibodies.
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Affiliation(s)
- Daniela Frasca
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Bonnie B Blomberg
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, United States
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134
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Caputo T, Gilardi F, Desvergne B. From chronic overnutrition to metaflammation and insulin resistance: adipose tissue and liver contributions. FEBS Lett 2017; 591:3061-3088. [DOI: 10.1002/1873-3468.12742] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 06/28/2017] [Accepted: 07/02/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Tiziana Caputo
- Center for Integrative Genomics; Lausanne Faculty of Biology and Medicine; University of Lausanne; Switzerland
| | - Federica Gilardi
- Center for Integrative Genomics; Lausanne Faculty of Biology and Medicine; University of Lausanne; Switzerland
| | - Béatrice Desvergne
- Center for Integrative Genomics; Lausanne Faculty of Biology and Medicine; University of Lausanne; Switzerland
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135
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Sobrinho Santos EM, Guimarães TA, Santos HO, Cangussu LMB, de Jesus SF, Fraga CADC, Cardoso CM, Santos SHS, de Paula AMB, Gomez RS, Guimarães ALS, Farias LC. Leptin acts on neoplastic behavior and expression levels of genes related to hypoxia, angiogenesis, and invasiveness in oral squamous cell carcinoma. Tumour Biol 2017; 39:1010428317699130. [PMID: 28459203 DOI: 10.1177/1010428317699130] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Leptin, one of the main hormones controlling energy homeostasis, has been associated with different cancer types. In oral cancer, its effect is not well understood. We investigated, through in vitro and in vivo assays, whether leptin can affect the neoplastic behavior of oral squamous cell carcinoma. Expression of genes possibly linked to the leptin pathway was assessed in leptin-treated oral squamous cell carcinoma cells and also in tissue samples of oral squamous cell carcinoma and oral mucosa, including leptin, leptin receptor, hypoxia-inducible factor 1-alpha, E-cadherin, matrix metalloproteinase-2, matrix metalloproteinase-9, Col1A1, Ki67, and mir-210. Leptin treatment favored higher rates of cell proliferation and migration, and reduced apoptosis. Accordingly, leptin-treated oral squamous cell carcinoma cells show decreased messenger RNA caspase-3 expression, and increased levels of E-cadherin, Col1A1, matrix metalloproteinase-2, matrix metalloproteinase-9, and mir-210. In tissue samples, hypoxia-inducible factor 1-alpha messenger RNA and protein expression of leptin and leptin receptor were high in oral squamous cell carcinoma cases. Serum leptin levels were increased in first clinical stages of the disease. In animal model, oral squamous cell carcinoma-induced mice show higher leptin receptor expression, and serum leptin level was increased in dysplasia group. Our findings suggest that leptin seems to exert an effect on oral squamous cell carcinoma cells behavior and also on molecular markers related to cell proliferation, migration, and tumor angiogenesis.
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Affiliation(s)
- Eliane Macedo Sobrinho Santos
- 1 Department of Dentistry, Universidade Estadual de Montes Claros, Montes Claros, Brazil.,2 Instituto Federal do Norte de Minas Gerais-Campus Araçuaí, Montes Claros, Brazil
| | | | | | | | | | | | | | - Sérgio Henrique Souza Santos
- 4 Institute of Agricultural Sciences, Food Engineering College, Universidade Federal de Minas Gerais (UFMG), Montes Claros, Minas Gerais, Brazil
| | | | - Ricardo Santiago Gomez
- 5 Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, Brazil
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Weiss L, Melchardt T, Egle A, Hopfinger G, Hackl H, Greil R, Barth J, Rummel M. Influence of body mass index on survival in indolent and mantle cell lymphomas: analysis of the StiL NHL1 trial. Ann Hematol 2017; 96:1155-1162. [PMID: 28456850 PMCID: PMC5486799 DOI: 10.1007/s00277-017-3003-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 04/10/2017] [Indexed: 11/25/2022]
Abstract
Obesity is a well-known risk factor for the development of cancer, but its influence on the course of disease is still controversial. We investigated the influence of body mass index (BMI) on overall survival (OS) in 502 patients with indolent non-Hodgkin’s lymphoma or mantle cell lymphoma in a subgroup analysis of the StiL (Study Group Indolent Lymphomas) NHL1 trial. We defined a cut-off of 22.55 kg/m2 by ROC calculation and Youden Index analysis and stratified patients into “low BMI” and “high BMI”. Five-year OS was significantly longer in the high BMI group (82.2%) when compared to that of the low BMI group (66.2%) (HR 0.597; 95%CI 0.370–0.963; p = 0.034). BMI was also an independent prognostic factor for OS in multivariate analysis (HR 0.541; 95%CI 0.332–0.883; p = 0.014). Of note, patients had a significantly lower BMI in the presence than patients in the absence of B-symptoms (p = 0.025). BMI significantly impacts on OS in indolent non-Hodgkin’s lymphoma and mantle cell lymphoma, which may be influenced by the effect of B-symptoms on BMI.
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Affiliation(s)
- Lukas Weiss
- Salzburg Cancer Research Institute, Department of Internal Medicine III, Salzburg Cancer Research Institute, Cancer Cluster Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria
| | - Thomas Melchardt
- Salzburg Cancer Research Institute, Department of Internal Medicine III, Salzburg Cancer Research Institute, Cancer Cluster Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria
| | - Alexander Egle
- Salzburg Cancer Research Institute, Department of Internal Medicine III, Salzburg Cancer Research Institute, Cancer Cluster Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria
| | - Georg Hopfinger
- Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - Hubert Hackl
- Division of Bioinformatics, Medical University of Innsbruck, Innsbruck, Austria
| | - Richard Greil
- Salzburg Cancer Research Institute, Department of Internal Medicine III, Salzburg Cancer Research Institute, Cancer Cluster Salzburg, Paracelsus Medical University, Muellner Hauptstrasse 48, 5020 Salzburg, Austria
| | - Juergen Barth
- Medizinische Klinik IV, Hospital of the Justus-Liebig-University, Giessen, Germany
| | - Mathias Rummel
- Medizinische Klinik IV, Hospital of the Justus-Liebig-University, Giessen, Germany
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137
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Fuster JJ, Ouchi N, Gokce N, Walsh K. Obesity-Induced Changes in Adipose Tissue Microenvironment and Their Impact on Cardiovascular Disease. Circ Res 2017; 118:1786-807. [PMID: 27230642 DOI: 10.1161/circresaha.115.306885] [Citation(s) in RCA: 400] [Impact Index Per Article: 57.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 02/16/2016] [Indexed: 02/07/2023]
Abstract
Obesity is causally linked with the development of cardiovascular disorders. Accumulating evidence indicates that cardiovascular disease is the collateral damage of obesity-driven adipose tissue dysfunction that promotes a chronic inflammatory state within the organism. Adipose tissues secrete bioactive substances, referred to as adipokines, which largely function as modulators of inflammation. The microenvironment of adipose tissue will affect the adipokine secretome, having actions on remote tissues. Obesity typically leads to the upregulation of proinflammatory adipokines and the downregulation of anti-inflammatory adipokines, thereby contributing to the pathogenesis of cardiovascular diseases. In this review, we focus on the microenvironment of adipose tissue and how it influences cardiovascular disorders, including atherosclerosis and ischemic heart diseases, through the systemic actions of adipokines.
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Affiliation(s)
- José J Fuster
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.).
| | - Noriyuki Ouchi
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.)
| | - Noyan Gokce
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.)
| | - Kenneth Walsh
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.).
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Abstract
Obesity provokes an imbalance in the immune system, including an aberrant type I interferon response during some viral infections and after TLR stimulation. SOCS3 overexpression and altered systemic leptin levels could be responsible for the reduced type I interferon production in people with obesity and, eventually, significantly increase the risk of viral infection. The aim of this study was to determine whether SOCS3- and leptin-induced tolerance are responsible for the reduced type I interferon production in people with obesity. SOCS3 overexpression in PBMCs from people with obesity was inhibited with the small interfering RNA (siRNA) assay, and leptin-induced tolerance was evaluated in PBMCs from non-obese volunte\ers and U937 cells treated with TLR ligands. SOCS3, but not SOCS1, gene silencing via siRNA increased the type I interferon response in PBMCs obtained from people with obesity. On the other hand, leptin induced SOCS3 expression and inhibited type I interferons in PBMCs from healthy donors and in U937 monocytes stimulated with TLR ligands. Taken together, these results demonstrate that reduced type I interferon production in obesity is caused by SOCS3 overexpression as well as tolerance induced by leptin. Here, we demonstrate a key role of leptin and SOCS3 in inhibiting the type I interferon response during obesity.
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139
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Jasinski-Bergner S, Radetzki AL, Jahn J, Wohlrab D, Kielstein H. Impact of the body mass index on perioperative immunological disturbances in patients with hip and knee arthroplasty. J Orthop Surg Res 2017; 12:58. [PMID: 28390430 PMCID: PMC5385075 DOI: 10.1186/s13018-017-0557-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 03/25/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Obesity increases the risk for knee and hip joint implantation and negatively contributes to wound healing. In this study, in 52 patients undergoing hip and knee arthroplasty the amount of peripheral immune effector cells pre- and post-operative, as well as the expression of certain soluble factors affecting the functions of immune effector cells were investigated. METHODS The peripheral immune cells and the expression of the soluble factors were determined by flow cytometry and correlated to each other in dependency of the BMI, the sex, and the kind of arthroplasty. RESULTS The pre-operative amounts of peripheral NK cells and cytotoxic T cells significantly decreased with increasing BMI. Furthermore, the expression of the immunomodulatory adipokine leptin nicely correlated to the BMI. These effects were stronger in males than in females. Furthermore, the correlation of the activation marker sTNF-R and peripheral T cells strongly decreased with increasing BMI. While IL-6, CD40L, and MPO were significantly induced after surgery, there were no correlations to the BMI. CONCLUSIONS The known wound-healing problems in obese patients and the osteoarthritis per se can be linked to the BMI. While obese patients exerted reduced peripheral NK cells and cytotoxic T cells (CTLs), IL-6 showed no involvement. However, the adipokine leptin strongly increased with the BMI strengthening its role as immunomodulatory molecule negatively interfering the functions of immune effector cells.
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Affiliation(s)
- Simon Jasinski-Bergner
- Department of Anatomy and Cell Biology, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany
| | - Anna-Luise Radetzki
- Department of Anatomy and Cell Biology, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany
| | - Janine Jahn
- Department of Anatomy and Cell Biology, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany
| | - David Wohlrab
- Department for Orthopedics, Trauma and Reconstructive Surgery, University Hospital of Halle (Saale), Halle (Saale), Germany
| | - Heike Kielstein
- Department of Anatomy and Cell Biology, Faculty of Medicine, Martin Luther University Halle-Wittenberg, Grosse Steinstrasse 52, 06108 Halle (Saale), Germany
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Pérez-Pérez A, Vilariño-García T, Fernández-Riejos P, Martín-González J, Segura-Egea JJ, Sánchez-Margalet V. Role of leptin as a link between metabolism and the immune system. Cytokine Growth Factor Rev 2017; 35:71-84. [PMID: 28285098 DOI: 10.1016/j.cytogfr.2017.03.001] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 03/01/2017] [Accepted: 03/02/2017] [Indexed: 12/24/2022]
Abstract
Leptin is an adipocyte-derived hormone not only with an important role in the central control of energy metabolism, but also with many pleiotropic effects in different physiological systems. One of these peripheral functions of leptin is a regulatory role in the interplay between energy metabolism and the immune system, being a cornerstone of the new field of immunometabolism. Leptin receptor is expressed throughout the immune system and the regulatory effects of leptin include cells from both the innate and adaptive immune system. Leptin is one of the adipokines responsible for the inflammatory state found in obesity that predisposes not only to type 2 diabetes, metabolic syndrome and cardiovascular disease, but also to autoimmune and allergic diseases. Leptin is an important mediator of the immunosuppressive state in undernutrition status. Placenta is the second source of leptin and it may play a role in the immunomodulation during pregnancy. Finally, recent work has pointed to the participation of leptin and leptin receptor in the pathophysiology of inflammation in oral biology. Therefore, leptin and leptin receptor should be considered for investigation as a marker of inflammation and immune activation in the frontier of innate-adaptive system, and as possible targets for intervention in the immunometabolic mediated pathophysiology.
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Affiliation(s)
- Antonio Pérez-Pérez
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain
| | - Teresa Vilariño-García
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain
| | - Patricia Fernández-Riejos
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain
| | - Jenifer Martín-González
- Department of Stomatology (Endodontics Section), School of Dentistry, University of Seville, Seville, Spain
| | - Juan José Segura-Egea
- Department of Stomatology (Endodontics Section), School of Dentistry, University of Seville, Seville, Spain
| | - Víctor Sánchez-Margalet
- Department of Medical Biochemistry and Molecular Biology and Immunology, Medical School and Department of Clinical Biochemistry, Virgen Macarena University Hospital, University of Seville, Spain.
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Exercise Training Attenuates the Dysregulated Expression of Adipokines and Oxidative Stress in White Adipose Tissue. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9410954. [PMID: 28168013 PMCID: PMC5266865 DOI: 10.1155/2017/9410954] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 12/25/2016] [Indexed: 12/15/2022]
Abstract
Obesity-induced inflammatory changes in white adipose tissue (WAT), which caused dysregulated expression of inflammation-related adipokines involving tumor necrosis factor-α and monocyte chemoattractant protein-1, contribute to the development of insulin resistance. Moreover, current literature reports state that WAT generates reactive oxygen species (ROS), and the enhanced production of ROS in obese WAT has been closely associated with the dysregulated expression of adipokines in WAT. Therefore, the reduction in excess WAT and oxidative stress that results from obesity is thought to be one of the important strategies in preventing and improving lifestyle-related diseases. Exercise training (TR) not only brings about a decrease in WAT mass but also attenuates obesity-induced dysregulated expression of the adipokines in WAT. Furthermore, some reports indicate that TR affects the generation of oxidative stress in WAT. This review outlines the impact of TR on the expression of inflammation-related adipokines and oxidative stress in WAT.
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142
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Abella V, Scotece M, Conde J, Pino J, Gonzalez-Gay MA, Gómez-Reino JJ, Mera A, Lago F, Gómez R, Gualillo O. Leptin in the interplay of inflammation, metabolism and immune system disorders. Nat Rev Rheumatol 2017; 13:100-109. [PMID: 28053336 DOI: 10.1038/nrrheum.2016.209] [Citation(s) in RCA: 323] [Impact Index Per Article: 46.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Leptin is one of the most relevant factors secreted by adipose tissue and the forerunner of a class of molecules collectively called adipokines. Initially discovered in 1994, its crucial role as a central regulator in energy homeostasis has been largely described during the past 20 years. Once secreted into the circulation, leptin reaches the central and peripheral nervous systems and acts by binding and activating the long form of leptin receptor (LEPR), regulating appetite and food intake, bone mass, basal metabolism, reproductive function and insulin secretion, among other processes. Research on the regulation of different adipose tissues has provided important insights into the intricate network that links nutrition, metabolism and immune homeostasis. The neuroendocrine and immune systems communicate bi-directionally through common ligands and receptors during stress responses and inflammation, and control cellular immune responses in several pathological situations including immune-inflammatory rheumatic diseases. This Review discusses the latest findings regarding the role of leptin in the immune system and metabolism, with particular emphasis on its effect on autoimmune and/or inflammatory rheumatic diseases, such as rheumatoid arthritis and osteoarthritis.
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Affiliation(s)
- Vanessa Abella
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Santiago University Clinical Hospital, Building C, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Morena Scotece
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Santiago University Clinical Hospital, Building C, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Javier Conde
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Santiago University Clinical Hospital, Building C, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Jesús Pino
- SERGAS (Servizo Galego de Saude), Santiago University Clinical Hospital, Division of Orthopaedic Surgery and Traumatology, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Miguel Angel Gonzalez-Gay
- Epidemiology, Genetics and Atherosclerosis Research Group on Systemic Inflammatory Diseases, Universidad de Cantabria and IDIVAL, Hospital Universitario Marqués de Valdecilla, Av. Valdecilla, Santander 39008, Spain
| | - Juan J Gómez-Reino
- SERGAS (Servizo Galego de Saude), Santiago University Clinical Hospital, Division of Rheumatology, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Antonio Mera
- SERGAS (Servizo Galego de Saude), Santiago University Clinical Hospital, Division of Rheumatology, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Francisca Lago
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), Department of Cellular and Molecular Cardiology, CIBERCV (Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares), Building C, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Rodolfo Gómez
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Santiago University Clinical Hospital, Building C, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
| | - Oreste Gualillo
- SERGAS (Servizo Galego de Saude) and IDIS (Instituto de Investigación Sanitaria de Santiago), The NEIRID Group (Neuroendocrine Interactions in Rheumatology and Inflammatory Diseases), Santiago University Clinical Hospital, Building C, Travesía da Choupana S/N, Santiago de Compostela 15706, Spain
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Procaccini C, La Rocca C, Carbone F, De Rosa V, Galgani M, Matarese G. Leptin as immune mediator: Interaction between neuroendocrine and immune system. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2017; 66:120-129. [PMID: 27288847 DOI: 10.1016/j.dci.2016.06.006] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 05/27/2016] [Accepted: 06/07/2016] [Indexed: 06/06/2023]
Abstract
Leptin is an adipocyte-derived hormone/cytokine that links nutritional status with neuroendocrine and immune functions. Initially described as an anti-obesity hormone, leptin has subsequently been shown to exert pleiotropic effects, being also able to influence haematopoiesis, thermogenesis, reproduction, angiogenesis, and more importantly immune homeostasis. As a cytokine, leptin can affect both innate and adaptive immunity, by inducing a pro-inflammatory response and thus playing a key role in the regulation of the pathogenesis of several autoimmune/inflammatory diseases. In this review, we discuss the most recent advances on the role of leptin as immune-modulator in mammals and we also provide an overview on its main functions in non-mammalian vertebrates.
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Affiliation(s)
- Claudio Procaccini
- Laboratorio di Immunologia, Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (IEOS-CNR), c/o Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131 Napoli, Italy
| | - Claudia La Rocca
- Laboratorio di Immunologia, Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (IEOS-CNR), c/o Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131 Napoli, Italy
| | - Fortunata Carbone
- Laboratorio di Immunologia, Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (IEOS-CNR), c/o Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131 Napoli, Italy
| | - Veronica De Rosa
- Laboratorio di Immunologia, Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (IEOS-CNR), c/o Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131 Napoli, Italy; Unità di NeuroImmunologia, Fondazione Santa Lucia, 00143 Roma, Italy
| | - Mario Galgani
- Laboratorio di Immunologia, Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (IEOS-CNR), c/o Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131 Napoli, Italy
| | - Giuseppe Matarese
- Laboratorio di Immunologia, Istituto di Endocrinologia e Oncologia Sperimentale, Consiglio Nazionale delle Ricerche (IEOS-CNR), c/o Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131 Napoli, Italy; Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli "Federico II", 80131 Napoli, Italy.
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144
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Deck CA, Honeycutt JL, Cheung E, Reynolds HM, Borski RJ. Assessing the Functional Role of Leptin in Energy Homeostasis and the Stress Response in Vertebrates. Front Endocrinol (Lausanne) 2017; 8:63. [PMID: 28439255 PMCID: PMC5384446 DOI: 10.3389/fendo.2017.00063] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 03/23/2017] [Indexed: 12/14/2022] Open
Abstract
Leptin is a pleiotropic hormone that plays a critical role in regulating appetite, energy metabolism, growth, stress, and immune function across vertebrate groups. In mammals, it has been classically described as an adipostat, relaying information regarding energy status to the brain. While retaining poor sequence conservation with mammalian leptins, teleostean leptins elicit a number of similar regulatory properties, although current evidence suggests that it does not function as an adipostat in this group of vertebrates. Teleostean leptin also exhibits functionally divergent properties, however, possibly playing a role in glucoregulation similar to what is observed in lizards. Further, leptin has been recently implicated as a mediator of immune function and the endocrine stress response in teleosts. Here, we provide a review of leptin physiology in vertebrates, with a particular focus on its actions and regulatory properties in the context of stress and the regulation of energy homeostasis.
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Affiliation(s)
- Courtney A. Deck
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
| | - Jamie L. Honeycutt
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
| | - Eugene Cheung
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
| | - Hannah M. Reynolds
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
| | - Russell J. Borski
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, USA
- *Correspondence: Russell J. Borski,
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145
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Oh KJ, Lee DS, Kim WK, Han BS, Lee SC, Bae KH. Metabolic Adaptation in Obesity and Type II Diabetes: Myokines, Adipokines and Hepatokines. Int J Mol Sci 2016; 18:ijms18010008. [PMID: 28025491 PMCID: PMC5297643 DOI: 10.3390/ijms18010008] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/24/2016] [Accepted: 12/12/2016] [Indexed: 12/21/2022] Open
Abstract
Obesity and type II diabetes are characterized by insulin resistance in peripheral tissues. A high caloric intake combined with a sedentary lifestyle is the leading cause of these conditions. Whole-body insulin resistance and its improvement are the result of the combined actions of each insulin-sensitive organ. Among the fundamental molecular mechanisms by which each organ is able to communicate and engage in cross-talk are cytokines or peptides which stem from secretory organs. Recently, it was reported that several cytokines or peptides are secreted from muscle (myokines), adipose tissue (adipokines) and liver (hepatokines) in response to certain nutrition and/or physical activity conditions. Cytokines exert autocrine, paracrine or endocrine effects for the maintenance of energy homeostasis. The present review is focused on the relationship and cross-talk amongst muscle, adipose tissue and the liver as secretory organs in metabolic diseases.
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Affiliation(s)
- Kyoung-Jin Oh
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.
- Department of Functional Genomics, University of Science and Technology (UST), Daejeon 34141, Korea.
| | - Da Som Lee
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.
| | - Won Kon Kim
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.
- Department of Functional Genomics, University of Science and Technology (UST), Daejeon 34141, Korea.
| | - Baek Soo Han
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.
- Department of Functional Genomics, University of Science and Technology (UST), Daejeon 34141, Korea.
| | - Sang Chul Lee
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.
- Department of Functional Genomics, University of Science and Technology (UST), Daejeon 34141, Korea.
| | - Kwang-Hee Bae
- Metabolic Regulation Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea.
- Department of Functional Genomics, University of Science and Technology (UST), Daejeon 34141, Korea.
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146
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Correlation of crevicular fluid and serum levels of retinol-binding protein 4 and leptin in chronic periodontitis and obesity. Clin Oral Investig 2016; 21:2319-2325. [PMID: 27933445 DOI: 10.1007/s00784-016-2025-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 12/02/2016] [Indexed: 01/26/2023]
Abstract
OBJECTIVE Retinol-binding protein 4 (RBP4) and leptin are both adipokines and involved in the pathophysiology of different vascular and inflammatory diseases and selectively elevated in patients with obesity. The aim of the present study was to determine and correlate the levels of RBP4 and leptin in gingival crevicular fluid (GCF) and serum in patients with chronic periodontitis (CP) and obesity. MATERIALS AND METHODS A total of 70 patients with age group 25 to 45 years were divided into four groups based on gingival index (GI), probing depth (PD), clinical attachment level (CAL), body mass index (BMI) and radiographic evidence of bone loss. The groups were (1) group I (non-obese periodontally healthy), (2) group II (obese periodontally healthy), (3) group III (non-obese with chronic periodontitis) and (4) group IV (obese with chronic periodontitis). The GCF and serum levels of human RBP4 and leptin were quantified using ELISA. RESULTS An increase in RBP4 levels from group I to group IV was found in both GCF and serum. However, GCF leptin levels was found to be greatest in group II, then group I, group IV and group III showing the least while an increase in serum levels from group I to group IV was found. The GCF and serum values of the inflammatory mediator correlated with the evaluated periodontal parameters and with each other (p < 0.05). CONCLUSION RBP4 and leptin can be considered as possible GCF and serum markers of inflammatory activity in CP and obesity, which further longitudinal studies are needed.
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147
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Kurajoh M, Kadoya M, Morimoto A, Naka M, Miyoshi A, Kanzaki A, Kakutani-Hatayama M, Hamamoto K, Shoji T, Moriwaki Y, Yamamoto T, Inaba M, Namba M, Koyama H. Plasma leptin concentration is associated with fatigue severity in patients with cardiovascular risk factors - HSCAA study. Psychoneuroendocrinology 2016; 74:7-12. [PMID: 27567116 DOI: 10.1016/j.psyneuen.2016.08.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/21/2016] [Accepted: 08/15/2016] [Indexed: 02/06/2023]
Abstract
Fatigue induced by complex dysfunctions of the central nervous system is frequently complained by patients with cardiovascular risk factors. Although leptin is considered to regulate the central nervous system, there are no reports regarding its association with fatigue in those patients. This cross-sectional study included 347 patients with cardiovascular risk factors. Fatigue score and plasma leptin concentration were measured. In addition, abdominal fat accumulation, systemic inflammation, sleep condition, and functions of hypothalamus-pituitary axis and autonomic system were estimated. Plasma leptin concentration (natural logarithm transformed) was significantly and positively (r=0.222, p<0.001) associated with fatigue score, and significantly (p<0.001) higher in the moderately-fatigued group (2.32±0.75ng/ml, mean±SD, n=52) than in the normally-fatigued group (1.85±1.02ng/ml, mean±SD, n=295). Multiple logistic regression analysis showed that plasma leptin concentration was significantly and independently associated with a moderately-fatigued condition independent of other factors, including age, gender, presence of diabetes, hypertension, dyslipidemia, alcohol consumption habit, urinary free cortisol, serum high-sensitive CRP concentration, visceral and subcutaneous fat area, apnea/hypopnea index, sleep efficiency, and heart rate variability. Hyperleptinemia may contribute to fatigue severity in patients with cardiovascular risk factors.
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Affiliation(s)
- Masafumi Kurajoh
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan; Department of Endocrinology, Metabolism and Molecular Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan.
| | - Manabu Kadoya
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Akiko Morimoto
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Mariko Naka
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Akio Miyoshi
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Akinori Kanzaki
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Miki Kakutani-Hatayama
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Kae Hamamoto
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Takuhito Shoji
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Yuji Moriwaki
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Tetsuya Yamamoto
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Masaaki Inaba
- Department of Endocrinology, Metabolism and Molecular Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Mitsuyoshi Namba
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
| | - Hidenori Koyama
- Department of Internal Medicine, Division of Diabetes, Endocrinology and Metabolism, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan
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148
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Altered Interleukin-10 Signaling in Skeletal Muscle Regulates Obesity-Mediated Inflammation and Insulin Resistance. Mol Cell Biol 2016; 36:2956-2966. [PMID: 27644327 DOI: 10.1128/mcb.00181-16] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 09/13/2016] [Indexed: 12/20/2022] Open
Abstract
Skeletal muscle insulin resistance is a major characteristic of obesity and type 2 diabetes. Although obesity-mediated inflammation is causally associated with insulin resistance, the underlying mechanism is unclear. Here, we examined the effects of chronic obesity in mice with muscle-specific overexpression of interleukin-10 (MIL10). After 16 weeks of a high-fat diet (HFD), MIL10 mice became markedly obese but showed improved insulin action compared to that of wild-type mice, which was largely due to increased glucose metabolism and reduced inflammation in skeletal muscle. Since leptin regulates inflammation, the beneficial effects of interleukin-10 (IL-10) were further examined in leptin-deficient ob/ob mice. Muscle-specific overexpression of IL-10 in ob/ob mice (MCK-IL10ob/ob) did not affect spontaneous obesity, but MCK-IL10ob/ob mice showed increased glucose turnover compared to that in ob/ob mice. Last, mice with muscle-specific ablation of IL-10 receptor (M-IL10R-/-) were generated to determine whether IL-10 signaling in skeletal muscle is involved in IL-10 effects on glucose metabolism. After an HFD, M-IL10R-/- mice developed insulin resistance with reduced glucose metabolism compared to that in wild-type mice. Overall, these results demonstrate IL-10 effects to attenuate obesity-mediated inflammation and improve insulin sensitivity in skeletal muscle, and our findings implicate a potential therapeutic role of anti-inflammatory cytokines in treating insulin resistance and type 2 diabetes.
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Paulis L, Foulquier S, Namsolleck P, Recarti C, Steckelings UM, Unger T. Combined Angiotensin Receptor Modulation in the Management of Cardio-Metabolic Disorders. Drugs 2016; 76:1-12. [PMID: 26631237 PMCID: PMC4700059 DOI: 10.1007/s40265-015-0509-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Cardiovascular and metabolic disorders, such as hypertension, insulin resistance, dyslipidemia or obesity are linked with chronic low-grade inflammation and dysregulation of the renin–angiotensin system (RAS). Consequently, RAS inhibition by ACE inhibitors or angiotensin AT1 receptor (AT1R) blockers is the evidence-based standard for cardiovascular risk reduction in high-risk patients, including diabetics with albuminuria. In addition, RAS inhibition reduces the new onset of diabetes mellitus. Yet, the high and increasing prevalence of metabolic disorders, and the high residual risk even in properly treated patients, calls for additional means of pharmacological intervention. In the past decade, the stimulation of the angiotensin AT2 receptor (AT2R) has been shown to reduce inflammation, improve cardiac and vascular remodeling, enhance insulin sensitivity and increase adiponectin production. Therefore, a concept of dual AT1R/AT2R modulation emerges as a putative means for risk reduction in cardio-metabolic diseases. The approach employing simultaneous RAS blockade (AT1R) and RAS stimulation (AT2R) is distinct from previous attempts of double intervention in the RAS by dual blockade. Dual blockade abolishes the AT1R-linked RAS almost completely with subsequent risk of hypotension and hypotension-related events, i.e. syncope or renal dysfunction. Such complications might be especially prominent in patients with renal impairment or patients with isolated systolic hypertension and normal-to-low diastolic blood pressure values. In contrast to dual RAS blockade, the add-on of AT2R stimulation does not exert significant blood pressure effects, but it may complement and enhance the anti-inflammatory and antifibrotic/de-stiffening effects of the AT1R blockade and improve the metabolic profile. Further studies will have to investigate these putative effects in particular for settings in which blood pressure reduction is not primarily desired.
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Affiliation(s)
- Ludovit Paulis
- Faculty of Medicine, Institute of Pathological Physiology, Comenius University in Bratislava, Sasinkova 4, 81108, Bratislava, Slovak Republic.,Institute of Normal and Pathological Physiology, Slovak Academy of Sciences, Sienkiewiczova 1, 81371, Bratislava, Slovak Republic
| | - Sébastien Foulquier
- CARIM-School for Cardiovascular Diseases, Maastricht University, PO Box 616, 6200 MD, Maastricht, The Netherlands
| | - Pawel Namsolleck
- CARIM-School for Cardiovascular Diseases, Maastricht University, PO Box 616, 6200 MD, Maastricht, The Netherlands
| | - Chiara Recarti
- CARIM-School for Cardiovascular Diseases, Maastricht University, PO Box 616, 6200 MD, Maastricht, The Netherlands
| | - Ulrike Muscha Steckelings
- Institute of Molecular Medicine-Department of Cardiovascular and Renal Research, University of Southern Denmark, 5000, Odense, Denmark
| | - Thomas Unger
- CARIM-School for Cardiovascular Diseases, Maastricht University, PO Box 616, 6200 MD, Maastricht, The Netherlands.
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Felley LE, Sharma A, Theisen E, Romero-Masters JC, Sauer JD, Gumperz JE. Human Invariant NKT Cells Induce IL-1β Secretion by Peripheral Blood Monocytes via a P2X7-Independent Pathway. THE JOURNAL OF IMMUNOLOGY 2016; 197:2455-64. [PMID: 27534556 DOI: 10.4049/jimmunol.1600790] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 07/19/2016] [Indexed: 01/02/2023]
Abstract
The cytokine IL-1β plays a central role in inflammatory responses that are initiated by microbial challenges, as well as in those that are due to endogenous processes (often called sterile inflammation). IL-1β secretion that occurs independently of microbial stimulation is typically associated with the presence of endogenous alarmins, such as extracellular ATP (an indicator of cytopathic damage). In this study, we show that IL-2-activated human invariant NKT (iNKT) cells stimulate the secretion of IL-1β protein by human peripheral blood monocytes in a manner that requires neither the presence of microbial compounds nor signaling through the extracellular ATP receptor P2X7 Monocyte IL-1β production was specifically induced by iNKT cells, because similarly activated polyclonal autologous T cells did not have this effect. Secretion of IL-1β protein occurred rapidly (within 3-4 h) and required cell contact between the iNKT cells and monocytes. Similar to IL-1β production induced by TLR stimulation, the iNKT-induced pathway appeared to entail a two-step process involving NF-κB signaling and IL1B gene transcription, as well as assembly of the NLRP3 inflammasome and activation of caspase-1. However, in contrast to the classical inflammasome-mediated pathway of IL-1β production, activation of monocytes via P2X7 was dispensable for iNKT-induced IL-1β secretion, and potassium efflux was not required. Moreover, the iNKT-induced effect involved caspase-8 activity, yet it induced little monocyte death. These results suggest that IL-2-activated human iNKT cells induce monocytes to produce IL-1β through a distinctive pathway that does not require the presence of microbial danger signals or alarmins associated with cytopathic damage.
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Affiliation(s)
- Laura E Felley
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - Akshat Sharma
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - Erin Theisen
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - James C Romero-Masters
- Department of Oncology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706
| | - John-Demian Sauer
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
| | - Jenny E Gumperz
- Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706; and
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