RESUMO
The gene encoding RhoA guanine nucleotide exchange factor 10(ARHGEF10) has been reported to be a risk factor for atherothrombotic stroke (AS) in Japanese. The single-nucleotide polymorphism (SNP) rs4376531 in intron 16 on ARHGEF10 is associated with AS and may play a role in the disease pathology. In order to explore the nature of this association in greater detail and in a new ethnic group, we carried out a case-control study to determine whether the rs4376531 polymorphism in ARHGEF10 is a risk factor of AS in Han Chinese people. This study was carried out to assay the frequency of genotypes and alleles of SNP rs4376531 in ARHGEF10 in patients with ischemic stroke and healthy controls using the polymerase chain reaction and the restriction fragment length polymorphism (PCR-RFLP) technique. A total of 383 individuals with AS in West China Hospital and 214 unrelated healthy controls were recruited. The frequencies of the G allele and GG genotype of the rs4376531 polymorphism were higher in the patients with AS than in control individuals: frequency of G, 91.0% vs 83.4%, P<0.001; GG, 82.2% vs 67.8%, P<0.001. After adjusting for sex, age, and multiple cardiovascular risk factors, the homozygous GG genotype for this variant was associated with a higher risk of AS, with an adjusted odds ratio of 4.99 (95% CI, 2.55-7.81, P< 0.001). Our findings suggest that the rs4376531 polymorphism in the ARHGEF10 gene is a risk factor for AS in the Han Chinese population.
Assuntos
Aterosclerose/epidemiologia , Aterosclerose/genética , Fatores de Troca do Nucleotídeo Guanina/genética , Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/genética , Trombose/epidemiologia , Trombose/genética , Adulto , Idoso , Alelos , Povo Asiático , DNA/genética , Interpretação Estatística de Dados , Feminino , Genótipo , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Fatores de Troca de Nucleotídeo Guanina Rho , Fatores de RiscoRESUMO
BACKGROUND: Previous association studies examining the relationship between the APOC1 polymorphism and susceptibility to Alzheimer's disease (AD) have shown conflicting results, and it is not clear if an APOC1 variant acts as a genetic risk factor in AD etiology across multiple populations. METHODS: To confirm the risk association between APOC1 and AD, we designed a case-control study and also performed a meta-analysis of previously published studies. RESULTS: Seventy-nine patients with AD and one hundred fifty-six unrelated controls were included in case-control study. No association was found between the variation of APOC1 and AD in stage 1 of our study. However, our meta-analysis pooled a total of 2092 AD patients and 2685 controls. The APOC1 rs11568822 polymorphism was associated with increased AD risk in Caucasians, Asians and Caribbean Hispanics, but not in African Americans. APOE ε4 carriers harboring the APOC1 insertion allele, were more prevalent in AD patients than controls (χ(2)â=â119.46, ORâ=â2.79, 95% CIâ=â2.31-3.36, P<0.01). CONCLUSIONS: The APOC1 insertion allele, in combination with APOE ε4, likely serves as a potential risk factor for developing AD.