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Solmi M, Gallicchio D, Collantoni E, Correll CU, Clementi M, Pinato C, Forzan M, Cassina M, Fontana F, Giannunzio V, Piva I, Siani R, Salvo P, Santonastaso P, Tenconi E, Veronese N, Favaro A. Serotonin transporter gene polymorphism in eating disorders: Data from a new biobank and META-analysis of previous studies. World J Biol Psychiatry 2016; 17:244-57. [PMID: 26895183 DOI: 10.3109/15622975.2015.1126675] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
UNLABELLED Objectives Growing interest focuses on the association between 5-HTTLPR polymorphism and eating disorders (ED), but published findings have been conflicting. Methods The Italian BIO.VE.D.A. biobank provided 976 samples (735 ED patients and 241 controls) for genotyping. We conducted a literature search of studies published up to 1 April 2015, including studies reporting on 5HTTLPR genotype and allele frequencies in obesity and/or ED. We ran a meta-analysis, including data from BIO.VE.D.A. - comparing low and high-functioning genotype and allele frequencies in ED vs. CONTROLS Results Data from 21 studies, plus BIO.VE.D.A., were extracted providing information from 3,736 patients and 2,707 controls. Neither low- nor high-functioning genotype frequencies in ED patients, with both bi- and tri-allelic models, differed from controls. Furthermore, neither low- nor high-functioning allele frequencies in ED or in BN, in both bi- and triallelic models, differed from control groups. After sensitivity analysis, results were the same in AN vs. CONTROLS Results remained unaltered when investigating recessive and dominant models. Conclusions 5HTTLPR does not seem to be associated with ED in general, or with AN or BN in particular. Future studies in ED should explore the role of ethnicity and psychiatric comorbidity as a possible source of bias.
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Affiliation(s)
- M Solmi
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy ;,g Department of Neuroscience , University of Padova , Italy
| | - D Gallicchio
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy ;,g Department of Neuroscience , University of Padova , Italy
| | - E Collantoni
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy ;,g Department of Neuroscience , University of Padova , Italy
| | - C U Correll
- c The Zucker Hillside Hospital, Psychiatry Research, NorthShore - Long Island Jewish Health System , Glen Oaks , New York , USA ;,d Hofstra North Shore LIJ School of Medicine , Hempstead , New York , USA ;,e The Feinstein Institute for Medical Research , Manhasset , New York , USA ;,f Albert Einstein College of Medicine , Bronx , New York , USA
| | - M Clementi
- h Clinical Genetics Unit, Department of Woman and Child Health , University of Padova
| | - C Pinato
- h Clinical Genetics Unit, Department of Woman and Child Health , University of Padova
| | - M Forzan
- h Clinical Genetics Unit, Department of Woman and Child Health , University of Padova
| | - M Cassina
- h Clinical Genetics Unit, Department of Woman and Child Health , University of Padova
| | - F Fontana
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy
| | - V Giannunzio
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy ;,g Department of Neuroscience , University of Padova , Italy
| | - I Piva
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy
| | - R Siani
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy
| | - P Salvo
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy
| | - P Santonastaso
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy ;,g Department of Neuroscience , University of Padova , Italy ;,i Centro Neuroscience Cognitive (CNC), University of Padova , Italy
| | - E Tenconi
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy ;,g Department of Neuroscience , University of Padova , Italy ;,i Centro Neuroscience Cognitive (CNC), University of Padova , Italy
| | - N Veronese
- b Department of Medicine- DIMED , Geriatrics Section, University of Padova , Italy
| | - A Favaro
- a BIO.VE.D.A. Group (BIObanca VEneta per I Disturbi Dell'alimentazione: Biobank of the Veneto Region Eating Disorders Units) , Veneto Region , Italy ;,g Department of Neuroscience , University of Padova , Italy ;,i Centro Neuroscience Cognitive (CNC), University of Padova , Italy
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Ritze Y, Hengelhaupt C, Bárdos G, Ernst B, Thurnheer M, D'Haese JG, Bischoff SC, Schultes B. Altered intestinal neuroendocrine gene expression in humans with obesity. Obesity (Silver Spring) 2015; 23:2278-85. [PMID: 26381270 DOI: 10.1002/oby.21253] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 07/01/2015] [Accepted: 07/12/2015] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Gastrointestinal hormones are critically involved in the regulation of food intake and body weight. Previous studies support an interplay between gastrointestinal hormones and the serotonergic system. This study explored intestinal neuroendocrine expression patterns in humans with obesity versus nonobese humans. METHODS Jejunum samples were collected from 164 humans with obesity (120 women; BMI (mean ± SD): 43.5 ± 6.6 kg/m(2) ) while they underwent Roux-en-Y gastric bypass surgery and from 18 nonobese humans (7 women; BMI: 23.5 ± 3.0 kg/m(2) ) undergoing distinct intestinal surgeries. mRNA expression of cholecystokinin (CCK), peptide YY3-36 (PYY), nesfatin1, ghrelin, ghrelin O-acyltransferase (GOAT), leptin, leptin receptor (leptinR), glucagon-like-peptide 1 receptor (GLP1R), serotonin transporter (SERT), tryptophan hydroxylase 1 (TPH1), and serotonin receptor 3A (5HT3A R) was determined with qRT-PCR. Ghrelin and GOAT protein expression was quantified using immunohistological stainings. Statistical analyses were performed with SPSS. RESULTS Jejunum samples from humans with obesity showed a higher expression of GOAT (mRNA and protein), TPH1, and SERT mRNA compared with the nonobese humans (all P < 0.05). Positive correlations were observed between TPH1, CCK, PYY, and nesfatin1 in nonobese and GOAT, ghrelin, TPH1, SERT, CCK, and PYY in humans with obesity (all P < 0.01). CONCLUSIONS Our top-down approach substantiates the dysregulation of jejunal neuroendocrine hormones in obesity.
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Affiliation(s)
- Yvonne Ritze
- Department of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | | | - Gyöngyi Bárdos
- Department of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Barbara Ernst
- eSwiss Medical and Surgical Center, Interdisciplinary Obesity Center, St. Gallen, Switzerland
| | - Martin Thurnheer
- eSwiss Medical and Surgical Center, Interdisciplinary Obesity Center, St. Gallen, Switzerland
| | - Jan G D'Haese
- Department of Surgery, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Stephan C Bischoff
- Department of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Bernd Schultes
- eSwiss Medical and Surgical Center, Interdisciplinary Obesity Center, St. Gallen, Switzerland
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Abstract
Food is a potent natural reward and food intake is a complex process. Reward and gratification associated with food consumption leads to dopamine (DA) production, which in turn activates reward and pleasure centers in the brain. An individual will repeatedly eat a particular food to experience this positive feeling of gratification. This type of repetitive behavior of food intake leads to the activation of brain reward pathways that eventually overrides other signals of satiety and hunger. Thus, a gratification habit through a favorable food leads to overeating and morbid obesity. Overeating and obesity stems from many biological factors engaging both central and peripheral systems in a bi-directional manner involving mood and emotions. Emotional eating and altered mood can also lead to altered food choice and intake leading to overeating and obesity. Research findings from human and animal studies support a two-way link between three concepts, mood, food, and obesity. The focus of this article is to provide an overview of complex nature of food intake where various biological factors link mood, food intake, and brain signaling that engages both peripheral and central nervous system signaling pathways in a bi-directional manner in obesity.
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Affiliation(s)
- Minati Singh
- Department of Pediatrics, University of Iowa Iowa City, IA, USA ; Department of Pediatrics, HHMI, University of Iowa Iowa City, IA, USA
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