Genetic variants associated with response to lithium treatment in bipolar disorder: a genome-wide association study
- PMID: 26806518
- PMCID: PMC4814312
- DOI: 10.1016/S0140-6736(16)00143-4
Genetic variants associated with response to lithium treatment in bipolar disorder: a genome-wide association study
Abstract
Background: Lithium is a first-line treatment in bipolar disorder, but individual response is variable. Previous studies have suggested that lithium response is a heritable trait. However, no genetic markers of treatment response have been reproducibly identified.
Methods: Here, we report the results of a genome-wide association study of lithium response in 2563 patients collected by 22 participating sites from the International Consortium on Lithium Genetics (ConLiGen). Data from common single nucleotide polymorphisms (SNPs) were tested for association with categorical and continuous ratings of lithium response. Lithium response was measured using a well established scale (Alda scale). Genotyped SNPs were used to generate data at more than 6 million sites, using standard genomic imputation methods. Traits were regressed against genotype dosage. Results were combined across two batches by meta-analysis.
Findings: A single locus of four linked SNPs on chromosome 21 met genome-wide significance criteria for association with lithium response (rs79663003, p=1·37 × 10(-8); rs78015114, p=1·31 × 10(-8); rs74795342, p=3·31 × 10(-9); and rs75222709, p=3·50 × 10(-9)). In an independent, prospective study of 73 patients treated with lithium monotherapy for a period of up to 2 years, carriers of the response-associated alleles had a significantly lower rate of relapse than carriers of the alternate alleles (p=0·03268, hazard ratio 3·8, 95% CI 1·1-13·0).
Interpretation: The response-associated region contains two genes for long, non-coding RNAs (lncRNAs), AL157359.3 and AL157359.4. LncRNAs are increasingly appreciated as important regulators of gene expression, particularly in the CNS. Confirmed biomarkers of lithium response would constitute an important step forward in the clinical management of bipolar disorder. Further studies are needed to establish the biological context and potential clinical utility of these findings.
Funding: Deutsche Forschungsgemeinschaft, National Institute of Mental Health Intramural Research Program.
Trial registration: ClinicalTrials.gov NCT00001174.
Copyright © 2016 Elsevier Ltd. All rights reserved.
Conflict of interest statement
Adli M has received a grant from Servier, speaker’s fees from Servier, Lundbecck, Aristo, Parexel, Gilead, ViiV, and Deutsche Bank plus a non-financial support from Lundbeck. Akiyama K has received speaker’s fees from Taisho Toyama Pharmaceutical. Alda M is funded by a grant of the Canadian Institutes of Health Research. Bauer M has received speaker’s fees from Alkermes, Astra Zeneca, BristolMyersSquibb, and Ferrer Internacional. Etain B received non-financial support from Labex Biopsy and Fondation Fondamental. Hashimoto R received grants and speaker honoraria from Dainippon Sumitomo Pharma and Novartis plus speaker honoraria from Eli Lilly Japan, GlaxoSmithKline, Hisamitsu Pharmaceutical, Janssen Pharmaceutical, Nippon Zoki Pharmaceutical, Otsuka Pharmaceutical, Astellas Pharma, Pfizer, and the Yoshitomiyakuhin Corporation. Kato T received a grant from Takeda Pharmaceutical and fees from Kyowa Hakko Kirin, Eli Lilly Japan, Otsuka Pharmaceutical, GlaxoSmithKline, Taisho Toyama Pharmaceutical, Dainippon Sumitomo Pharma, Meiji Seika Pharma, Pfizer Japan, Mochida Pharmaceutical, Shionogi & Co, Janssen Pharmaceutical, Yoshitomiyakuhin Corporation, Agilent Technologies, Astellas Pharma, and Wako Pure Chemical Industries. Kusumi I received grants and fees from Dainippon Sumitomo Pharma, Eisai, Eli Lilly, GlaxoSmithKline, Kyowa Hakko Kirin, Meiji Seika Pharma, MSD, Novartis, Otsuka, Ono Pharmaceutical, Pfizer, Tanabe Mitsubishi Pharma, Takeda Pharmaceutical, Shionogi, and Yoshitomi Pharmaceutical; he received grants from AbbVie GK, Asahi Kasei Pharma, Boehringer Ingelheim, Chugai Pharmaceutical, and Daiichi Sankyo and fees from Astellas Pharma and Janssen Pharmaceutical. McCarthy MJ served as unpaid consultant for Pathway Genomic (San Diego, USA). McElroy received a grant and fees from Naurex and Shire, further grants from Alkermes, Cephalon, Forest, Marriott Foundation, Orexigen Therapeutics, and Takeda Pharmaceutical, he further has served on the advisory boards for Bracket, Hoffmann-La Roche, MedAvante, Sunovion and received fees from Novo Nordisk. Perlis RH received personal fees from RID Ventures, Genomind LLC, Healthrageous, Pfizer, Perfect Health, Proteus and Psybrain. Schofield PR received a grant from NHMRC. Schulze TG received a grant and fees from Roche Pharmaceuticals. Stamm TJ received personal fees from Servier, Lundbeck and BristolMyerSquibb. All above listed interests are outside of the submitted work. All other authors declare no conflict of interests.
Figures
Comment in
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Pharmacogenetics of lithium response: close to clinical practice?Lancet. 2016 Mar 12;387(10023):1034-1036. doi: 10.1016/S0140-6736(16)00147-1. Epub 2016 Jan 22. Lancet. 2016. PMID: 26806517 No abstract available.
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