RESUMEN
OBJECTIVE: To identify polymorphisms of the serotonin transporter(5-HTT) gene and to find out whether there was relationship between any such polymorphisms and sleep apnea syndrome (SAS). METHODS: For two polymorphisms of 5-HTT target DNA gene was amplified using polymerase chain reaction (PCR) and 6% non-denaturing polyacrylamide gels electrophoresis. The frequencies of the different forms of the genotypes and alleles of 5-HTT gene were analyzed in 104 patients with SAS and 150 healthy controls. RESULTS: The frequencies of the S or L alleles and the S/S, S/L or L/L genotypes in promoter region of 5-HTT gene in SAS group were not significantly different to those in healthy controls (P > 0.05). However, the frequencies of 10/10, 12/10 genotypes of 5-HTT-VNTR in SAS patients were significantly higher than those in healthy control subjects (P < 0.05). Moreover, the frequency of the allele 10 of 5-HTT-VNTR in SAS patients was significantly higher than that in healthy controls (P<0.01). CONCLUSION: The allele 10 of 5-HTT-VNTR might be a susceptible factor in the pathogenesis of SAS.
Asunto(s)
Polimorfismo Genético , Proteínas de Transporte de Serotonina en la Membrana Plasmática/genética , Síndromes de la Apnea del Sueño/genética , Adulto , Anciano , Alelos , Femenino , Frecuencia de los Genes , Predisposición Genética a la Enfermedad/genética , Genotipo , Humanos , Masculino , Persona de Mediana Edad , Repeticiones de Minisatélite/genética , Reacción en Cadena de la Polimerasa , Regiones Promotoras Genéticas/genética , Adulto JovenRESUMEN
OBJECTIVE: To study the status of and the factors contributing to Internet addiction among middle school students in Guangzhou. METHODS: Cluster sampling method was used to recruit an urban middle school, a rural junior middle school and a rural senior high school to conduct the survey with the stressful life event questionnaire, the trait-oriented coping styles questionnaire and the Internet Addiction Test. RESULTS: The majority of respondents were classified as normal users of the Internet (n=1392, 89.2%), with 158 (10.2%) moderately and 10 (0.6%) severely addicted to the Internet. Fifty-eight students had never used the Internet. There were significant differences in gender, the father's education, the 4 dimensions of the stressful life event questionnaire and the coping styles between students with and without Internet addiction. Binary logistic analysis showed that the factors contributing to Internet addiction included passive coping styles, male gender and stressful life event experienced in family and interpersonal communication. CONCLUSIONS: The incidence of Internet addiction is high among middle school students in Guangzhou. Male students with stressful life events in family and interpersonal communication, poor education on the part of the father, and frequent use of negative coping styles are more likely to develop Internet addiction.