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Boscutti A, Pigoni A, Delvecchio G, Lazzaretti M, Mandolini GM, Girardi P, Ferro A, Sala M, Abbiati V, Cappucciati M, Bellani M, Perlini C, Rossetti MG, Balestrieri M, Damante G, Bonivento C, Rossi R, Finos L, Serretti A, Brambilla P. The Influence of 5-HTTLPR, BDNF Rs6265 and COMT Rs4680 Polymorphisms on Impulsivity in Bipolar Disorder: The Role of Gender. Genes (Basel) 2022; 13:genes13030482. [PMID: 35328036 PMCID: PMC8954186 DOI: 10.3390/genes13030482] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 02/04/2023] Open
Abstract
Impulsivity has been proposed as an endophenotype for bipolar disorder (BD); moreover, impulsivity levels have been shown to carry prognostic significance and to be quality-of-life predictors. To date, reports about the genetic determinants of impulsivity in mood disorders are limited, with no studies on BD individuals. Individuals with BD and healthy controls (HC) were recruited in the context of an observational, multisite study (GECOBIP). Subjects were genotyped for three candidate single-nucleotide polymorphisms (SNPs) (5-HTTLPR, COMT rs4680, BDNF rs6265); impulsivity was measured through the Italian version of the Barratt Impulsiveness Scale (BIS-11). A mixed-effects regression model was built, with BIS scores as dependent variables, genotypes of the three polymorphisms as fixed effects, and centers of enrollment as random effect. Compared to HC, scores for all BIS factors were higher among subjects with euthymic BD (adjusted β for Total BIS score: 5.35, p < 0.001). No significant interaction effect was evident between disease status (HC vs. BD) and SNP status for any polymorphism. Considering the whole sample, BDNF Met/Met homozygosis was associated with lower BIS scores across all three factors (adjusted β for Total BIS score: −10.2, p < 0.001). A significant 5-HTTLPR x gender interaction was found for the SS genotype, associated with higher BIS scores in females only (adjusted β for Total BIS score: 12.0, p = 0.001). Finally, COMT polymorphism status was not significantly associated with BIS scores. In conclusion, BD diagnosis did not influence the effect on impulsivity scores for any of the three SNPs considered. Only one SNP—the BDNF rs6265 Met/Met homozygosis—was independently associated with lower impulsivity scores. The 5-HTTLPR SS genotype was associated with higher impulsivity scores in females only. Further studies adopting genome-wide screening in larger samples are needed to define the genetic basis of impulsivity in BD.
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Affiliation(s)
- Andrea Boscutti
- Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy;
| | - Alessandro Pigoni
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, 20122 Milan, Italy; (A.P.); (G.D.); (M.L.); (G.M.M.); (A.F.); (M.G.R.)
- Social and Affective Neuroscience Group, MoMiLab, IMT School for Advanced Studies Lucca, 55100 Lucca, Italy
| | - Giuseppe Delvecchio
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, 20122 Milan, Italy; (A.P.); (G.D.); (M.L.); (G.M.M.); (A.F.); (M.G.R.)
| | - Matteo Lazzaretti
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, 20122 Milan, Italy; (A.P.); (G.D.); (M.L.); (G.M.M.); (A.F.); (M.G.R.)
| | - Gian Mario Mandolini
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, 20122 Milan, Italy; (A.P.); (G.D.); (M.L.); (G.M.M.); (A.F.); (M.G.R.)
| | - Paolo Girardi
- Department of Developmental Psychology and Socialization, University of Padua, 35131 Padua, Italy; (P.G.); (L.F.)
| | - Adele Ferro
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, 20122 Milan, Italy; (A.P.); (G.D.); (M.L.); (G.M.M.); (A.F.); (M.G.R.)
| | - Michela Sala
- Mental Health Department, Azienda Sanitaria Locale Alessandria, 15121 Alessandria, Italy;
| | - Vera Abbiati
- Department of Brain and Behavioral Sciences, University of Pavia, 27100 Pavia, Italy;
| | - Marco Cappucciati
- Department of Mental Health and Substance Abuse, Azienda Sanitaria Locale Piacenza, 29121 Piacenza, Italy;
| | - Marcella Bellani
- Section of Psychiatry, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37134 Verona, Italy;
| | - Cinzia Perlini
- Section of Clinical Psychology, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37134 Verona, Italy;
| | - Maria Gloria Rossetti
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, 20122 Milan, Italy; (A.P.); (G.D.); (M.L.); (G.M.M.); (A.F.); (M.G.R.)
- Section of Psychiatry, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37134 Verona, Italy;
| | - Matteo Balestrieri
- Psychiatry Unit, Department of Medicine, University of Udine, 33100 Udine, Italy;
| | - Giuseppe Damante
- Department of Medicine (DAME), University of Udine, 33100 Udine, Italy;
| | - Carolina Bonivento
- IRCCS “E. Medea”, Polo Friuli-Venezia Giulia, San Vito al Tagliamento, 33078 Pordenone, Italy;
| | - Roberta Rossi
- Psychiatry Unit, IRCCS Istituto Centro San Giovanni di Dio FBF, 25125 Brescia, Italy;
| | - Livio Finos
- Department of Developmental Psychology and Socialization, University of Padua, 35131 Padua, Italy; (P.G.); (L.F.)
| | - Alessandro Serretti
- Department of Biomedical and NeuroMotor Sciences, University of Bologna, 40123 Bologna, Italy;
| | - Paolo Brambilla
- Department of Pathophysiology and Transplantation, University of Milan, 20122 Milan, Italy;
- Department of Neurosciences and Mental Health, Fondazione IRCCS Ca’ Granda-Ospedale Maggiore Policlinico, 20122 Milan, Italy; (A.P.); (G.D.); (M.L.); (G.M.M.); (A.F.); (M.G.R.)
- Correspondence:
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