Dataset Information

Replication of the association of a MET variant with autism in a Chinese Han population.

ABSTRACT: Autism is a common, severe and highly heritable neurodevelopmental disorder in children, affecting up to 100 children per 10,000. The MET gene has been regarded as a promising candidate gene for this disorder because it is located within a replicated linkage interval, is involved in pathways affecting the development of the cerebral cortex and cerebellum in ways relevant to autism patients, and has shown significant association signals in previous studies.Here, we present new ASD patient and control samples from Heilongjiang, China and use them in a case-control and family-based replication study of two MET variants. One SNP, rs38845, was successfully replicated in a case-control association study, but failed to replicate in a family-based study, possibly due to small sample size. The other SNP, rs1858830, failed to replicate in both case-control and family-based studies.This is the first attempt to replicate associations in Chinese autism samples, and our result provides evidence that MET variants may be relevant to autism susceptibility in the Chinese Han population.

SUBMITTER: Zhou X

PROVIDER: S-EPMC3217055 | biostudies-literature | 2011

REPOSITORIES: biostudies-literature

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Replication of the association of a MET variant with autism in a Chinese Han population.

Zhou Xue X Xu Yang Y Wang Jia J Zhou Hongbo H Liu Xian X Ayub Qasim Q Wang Xuelai X Tyler-Smith Chris C Wu Lijie L Xue Yali Y

PloS one 20111108 11

<h4>Background</h4>Autism is a common, severe and highly heritable neurodevelopmental disorder in children, affecting up to 100 children per 10,000. The MET gene has been regarded as a promising candidate gene for this disorder because it is located within a replicated linkage interval, is involved in pathways affecting the development of the cerebral cortex and cerebellum in ways relevant to autism patients, and has shown significant association signals in previous studies.<h4>Principal finding ...[more]

PMID: 22110649

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Project description:BackgroundAutism is a neurodevelopmental disorder with a high estimated heritability. ATP2B2, located on human chromosome 3p25.3, encodes the plasma membrane calcium-transporting ATPase 2 which extrudes Ca(2+) from cytosol into extracellular space. Recent studies reported association between ATP2B2 and autism in samples from Autism Genetic Resource Exchange (AGRE) and Italy. In this study, we investigated whether ATP2B2 polymorphisms were associated with autism in Chinese Han population.MethodsWe performed a family based association study between five SNPs (rs35678 in exon, rs241509, rs3774180, rs3774179, and rs2278556 in introns) in ATP2B2 and autism in 427 autism trios of Han Chinese descent. All SNPs were genotyped using the Sequenom genotyping platform. The family-based association test (FBAT) program was used to perform association test for SNPs and haplotype analyses.ResultsThis study demonstrated a preferential transmission of T allele of rs3774179 to affected offsprings under an additive model (T>C, Z?=?2.482, p?=?0.013). While C allele of rs3774179 showed an undertransmission from parents to affected children under an additive and a dominant model, respectively (Z?=?-2.482, p?=?0.013; Z?=?-2.591, p?=?0.0096). Haplotype analyses revealed that three haplotypes were significantly associated with autism. The haplotype C-C (rs3774180-rs3774179) showed a significant undertransmission from parents to affected offsprings both in specific and global haplotype FBAT (Z?=?-2.037, p?=?0.042; Global p?=?0.03). As for the haplotype constructed by rs3774179 and rs2278556, C-A might be a protective haplotype (Z?=?-2.206, p?=?0.027; Global p?=?0.04), while T-A demonstrated an excess transmission from parents to affected offsprings (Z?=?2.143, p?=?0.032). These results were still significant after using the permutation method to obtain empirical p values.ConclusionsOur research suggested that ATP2B2 might play a role in the etiology of autism in Chinese Han population.

Project description:Chromosome 6p21-p22.1, spanning the extended major histocompatibility complex (MHC) region, is a highly polymorphic, gene-dense region. It has been identified as a susceptibility locus of schizophrenia in Europeans, Japanese, and Chinese. In our previous two-stage genome-wide association study (GWAS), polymorphisms of zinc finger with KRAB and SCAN domains 4 (ZKSCAN4), nuclear factor-?B-activating protein-like (NKAPL), and piggyBac transposable element derived 1 (PGBD1), localized to chromosome 6p21-p22.1, were strongly associated with schizophrenia. To further investigate the association between polymorphisms at this locus and schizophrenia in the Chinese Han population, we selected eight other single-nucleotide polymorphisms (SNPs) distributed in or near these genes for a case-control association study in an independent sample of 902 cases and 1,091 healthy controls in an attempt to replicate the GWAS results. Four of these eight SNPs (rs12214383, rs1150724, rs3800324, and rs1997660) displayed a nominal difference in allele frequencies between the case and control groups. The association between two of these SNPs and schizophrenia were significant even after Bonferroni correction (rs12000: allele A>G, P = 2.50E-04, odds ratio [OR] = 1.27, 95% confidence interval [CI] = 1.12-1.45; rs1150722: allele C>T, P = 4.28E-05, OR = 0.55, 95% CI = 0.41-0.73). Haplotype ATTGACGC, comprising these eight SNPs (rs2235359, rs2185955, rs12214383, rs12000, rs1150724, rs1150722, rs3800324, and rs1997660), was significantly associated with schizophrenia (P = 6.60E-05). We also performed a combined study of this replication sample and the first-stage GWAS sample. The combined study revealed that rs12000 and rs1150722 were still strongly associated with schizophrenia (rs12000: allele G>A, P(combined) = 0.0019, OR = 0.81; rs1150722: allele G>A, P(combined) = 3.00E-04, OR = 0.61). These results support our findings that locus 6p21-p22.1 is significantly associated with schizophrenia in the Chinese Han population and encourage further studies of the functions of these genetic factors.

Dataset Information

Replication of the association of a MET variant with autism in a Chinese Han population.

Publications

Replication of the association of a MET variant with autism in a Chinese Han population.

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