title: Mutation of SLC35D3 causes metabolic syndrome by impairing dopamine signaling in striatal D1 neurons.
abstract: Obesity is one of the largest health problems facing the world today. Although twin and family studies suggest about two-thirds of obesity is caused by genetic factors, only a small fraction of this variance has been unraveled. There are still large numbers of genes to be identified that cause variations in body fatness and the associated diseases encompassed in the metabolic syndrome (MetS). A locus near a sequence tagged site (STS) marker D6S1009 has been linked to obesity or body mass index (BMI). However, its genetic entity is unknown. D6S1009 is located in the intergenic region between SLC35D3 and NHEG1. Here we report that the ros mutant mice harboring a recessive mutation in the Slc35d3 gene show obesity and MetS and reduced membrane dopamine receptor D1 (D1R) with impaired dopamine signaling in striatal neurons. SLC35D3 is localized to both endoplasmic reticulum (ER) and early endosomes and interacts with D1R. In ros striatal D1 neurons, lack of SLC35D3 causes the accumulation of D1R on the ER to impair its ER exit. The MetS phenotype is reversible by the administration of D1R agonist to the ros mutant. In addition, we identified two mutations in the SLC35D3 gene in patients with MetS, which alter the subcellular localization of SLC35D3. Our results suggest that the SLC35D3 gene, close to the D6S1009 locus, is a candidate gene for MetS, which is involved in metabolic control in the central nervous system by regulating dopamine signaling.
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China ; Graduate School of Chinese Academy of Sciences, Beijing, China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China ; Graduate School of Chinese Academy of Sciences, Beijing, China ; Reproductive and Genetic Center, National Research Institute for Family Planning, Beijing, China.
authors.forename: Chan-Juan
authors.initials: CJ
authors.lastname: Hao
authors.affiliation: The Affiliated Hospital of Qingdao University Medical College, Qingdao, China.
authors.forename: Chang-Gui
authors.initials: CG
authors.lastname: Li
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
authors.forename: Dong-Jie
authors.initials: DJ
authors.lastname: Zang
authors.affiliation: Model Animal Research Center, Nanjing University, Nanjing, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhao
authors.affiliation: Nanjing Children's Hospital, Nanjing Medical University, Nanjing, China.
authors.forename: Xiao-Nan
authors.initials: XN
authors.lastname: Li
authors.affiliation: Beijing Tongren Hospital, Capital Medical University, Beijing, China.
authors.forename: Ai-Hua
authors.initials: AH
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China ; Graduate School of Chinese Academy of Sciences, Beijing, China.
authors.forename: Zong-Bo
authors.initials: ZB
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
authors.forename: Xin
authors.initials: X
authors.lastname: He
authors.affiliation: Department of Pharmacology, Soochow University College of Pharmaceutical Sciences, Suzhou, China.
authors.forename: Xue-Chu
authors.initials: XC
authors.lastname: Zhen
authors.affiliation: Model Animal Research Center, Nanjing University, Nanjing, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China ; Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, Scotland, United Kingdom.
authors.forename: John R
authors.initials: JR
authors.lastname: Speakman
authors.affiliation: State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
mesh_terms: D000818:Animals; D002490:Central Nervous System / Q000378:metabolism / Q000473:pathology; D004298:Dopamine / Q000235:genetics* / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D024821:Metabolic Syndrome / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D051379:Mice; D009004:Monosaccharide Transport Proteins / Q000235:genetics* / Q000378:metabolism; D009154:Mutation; D009474:Neurons / Q000378:metabolism / Q000473:pathology; D009765:Obesity / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D017447:Receptors, Dopamine D1 / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction; D014793:Visual Cortex / Q000378:metabolism / Q000473:pathology
chemical_list: C583261:Drd1 protein, mouse; D009004:Monosaccharide Transport Proteins; D017447:Receptors, Dopamine D1; C518133:Slc35d3 protein, mouse; D004298:Dopamine