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New data and an old puzzle: the negative association between schizophrenia and rheumatoid arthritis

Lee, S Hong, Byrne, Enda M, Hultman, Christina M, Kähler, Anna, Vinkhuyzen, Anna AE, Ripke, Stephan, Andreassen, Ole A, Frisell, Thomas, Gusev, Alexander, Hu, Xinli, Karlsson, Robert, Mantzioris, Vasilis X, McGrath, John J, Mehta, Divya, Stahl, Eli A, Zhao, Qiongyi, Kendler, Kenneth S, Sullivan, Patrick F, Price, Alkes L, O'Donovan, Michael Conlon, Okada, Yukinori, Mowry, Bryan J, Raychaudhuri, Soumya, Wray, Naomi R, Byerley, William, Cahn, Wiepke, Cantor, Rita M, Cichon, Sven, Cormican, Paul, Curtis, David, Djurovic, Srdjan, Escott-Price, Valentina, Gejman, Pablo V, Georgieva, Lyudmila, Giegling, Ina, Hansen, Thomas F, Ingason, Andrés, Kim, Yunjung, Konte, Bettina, Lee, Phil H, McIntosh, Andrew, McQuillin, Andrew, Morris, Derek W, Nöthen, Markus M, O'Dushlaine, Colm, Olincy, Ann, Olsen, Line, Pato, Carlos N, Pato, Michele T, Pickard, Benjamin S, Posthuma, Danielle, Rasmussen, Henrik B, Rietschel, Marcella, Rujescu, Dan, Schulze, Thomas G, Silverman, Jeremy M, Thirumalai, Srinivasa, Werge, Thomas, Agartz, Ingrid, Amin, Farooq, Azevedo, Maria H, Bass, Nicholas, Black, Donald W, Blackwood, Douglas H R, Bruggeman, Richard, Buccola, Nancy G, Choudhury, Khalid, Cloninger, Robert C, Corvin, Aiden, Craddock, Nicholas John, Daly, Mark J, Datta, Susmita, Donohoe, Gary J, Duan, Jubao, Dudbridge, Frank, Fanous, Ayman, Freedman, Robert, Freimer, Nelson B, Friedl, Marion, Gill, Michael, Gurling, Hugh, De Haan, Lieuwe, Hamshere, Marian Lindsay, Hartmann, Annette M, Holmans, Peter Alan, Kahn, René S, Keller, Matthew C, Kenny, Elaine, Kirov, George, Krabbendam, Lydia, Krasucki, Robert, Lawrence, Jacob, Lencz, Todd, Levinson, Douglas F, Lieberman, Jeffrey A, Lin, Dan-Yu, Linszen, Don H, Magnusson, Patrik KE, Maier, Wolfgang, Malhotra, Anil K, Mattheisen, Manuel, Mattingsdal, Morten, McCarroll, Steven A, Medeiros, Helena, Melle, Ingrid, Milanova, Vihra, Myin-Germeys, Inez, Neale, Benjamin M, Ophoff, Roel A, Owen, Michael John, Pimm, Jonathan, Purcell, Shaun M, Puri, Vinay, Quested, Digby J, Rossin, Lizzy, Ruderfer, Douglas, Sanders, Alan R, Shi, Jianxin, Sklar, Pamela, St. Clair, David, Scott Stroup, T, Van Os, Jim, Visscher, Peter M, Wiersma, Durk, Zammit, Stanley, Louis Bridges, S, Choi, Hyon K, Coenen, Marieke JH, de Vries, Niek, Dieud, Philippe, Greenberg, Jeffrey D, Huizinga, Tom WJ, Padyukov, Leonid, Siminovitch, Katherine A, Tak, Paul P, Worthington, Jane, De Jager, Philip L, Denny, Joshua C, Gregersen, Peter K, Klareskog, Lars, Mariette, Xavier, Plenge, Robert M, van Laar, Mart and van Riel, Piet 2015. New data and an old puzzle: the negative association between schizophrenia and rheumatoid arthritis. International Journal of Epidemiology , pii: dyv136. 10.1093/ije/dyv136

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Abstract

Background: A long-standing epidemiological puzzle is the reduced rate of rheumatoid arthritis (RA) in those with schizophrenia (SZ) and vice versa. Traditional epidemiological approaches to determine if this negative association is underpinned by genetic factors would test for reduced rates of one disorder in relatives of the other, but sufficiently powered data sets are difficult to achieve. The genomics era presents an alternative paradigm for investigating the genetic relationship between two uncommon disorders. Methods: We use genome-wide common single nucleotide polymorphism (SNP) data from independently collected SZ and RA case-control cohorts to estimate the SNP correlation between the disorders. We test a genotype X environment (GxE) hypothesis for SZ with environment defined as winter- vs summer-born. Results: We estimate a small but significant negative SNP-genetic correlation between SZ and RA (−0.046, s.e. 0.026, P = 0.036). The negative correlation was stronger for the SNP set attributed to coding or regulatory regions (−0.174, s.e. 0.071, P = 0.0075). Our analyses led us to hypothesize a gene-environment interaction for SZ in the form of immune challenge. We used month of birth as a proxy for environmental immune challenge and estimated the genetic correlation between winter-born and non-winter born SZ to be significantly less than 1 for coding/regulatory region SNPs (0.56, s.e. 0.14, P  = 0.00090). Conclusions: Our results are consistent with epidemiological observations of a negative relationship between SZ and RA reflecting, at least in part, genetic factors. Results of the month of birth analysis are consistent with pleiotropic effects of genetic variants dependent on environmental context.

Item Type: Article
Date Type: Publication
Status: Published
Schools: MRC Centre for Neuropsychiatric Genetics and Genomics
Medicine
Neuroscience and Mental Health Research Institute (NMHRI)
Subjects: R Medicine > R Medicine (General)
Publisher: Oxford University Press
ISSN: 0300-5771
Last Modified: 30 Oct 2017 12:21
URI: http://orca.cf.ac.uk/id/eprint/80947

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