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1.
Biology (Basel) ; 11(10)2022 Sep 28.
Article in English | MEDLINE | ID: mdl-36290322

ABSTRACT

Disrupted circadian cycle has been reported in multiple sclerosis (MS). Previous genome-wide association studies (GWAS) singled out over 230 variants associated with MS. A study performed in a Slavic population identified two new single nucleotide polymorphisms (SNPs), rs6811520 (CLOCK) and rs3789327 (ARNTL/BMAL1), associated with MS risk. However, these regions that codify the capital regulators of circadian rhythm had not been linked to the disease before, so replication in independent populations is warranted to ascertain possible geographical differences. Our aim was to replicate the associations reported in the ARNTL/BMAL1 and CLOCK genes in a Spanish cohort with a maximum of 974 MS patients and 626 controls. In this study, 956 MS patients and 612 controls were successfully genotyped for rs6811520 and 943 MS patients and 598 controls for rs3789327.Clinical variables (age at disease onset, EDSS, or relapses) were collected in a maximum of 549 patients. No statistically significant differences were found between cases and controls for the analyzed SNPs, even after stratifications by sex, clinical form, or HLA-DRB1*15:01 status. No influence of the SNPs was found on age at disease onset, EDSS, or annual relapse rate at 5 years after onset. In conclusion, our study does not replicate the associations observed in the previously investigated Slavic population.

2.
Rev. bioméd. (México) ; 9(1): 23-5, ene.-mar. 1998.
Article in Spanish | LILACS | ID: lil-248098

ABSTRACT

Introducción. El cólera es un padecimiento infeccioso, producido por el Vibrio cholerae (V. cholerae), caracterizado por la aparición brusca de diarrea abundante, que puede producir deshidratación, choque hipovolemico y muerte en el transcurso de unas cuantas horas. Aparece en forma brusca o gradual dando lugar a grandes epidemias por su alto grado de infección. Material y método. El objetivo de este trabajo fue determinar la existencia de portadores de V. cholerae en la población de Kuchel municipio de Samahil, tras un brote epidémico registrado en los últimos meses de 1995 en esta localidad. El estudio se realizó con una muestra de 75 personas seleccionadas al azar, a las cuales se les tomó una muestra rectal de heces fecales con la ayuda de un hisopo estéril y se buscó la presencia de V. cholerae en TCBS y pruebas bioquímicas específicas. Resultados y Discusión. De todas las muestras tomadas, en ninguna se aisló V. cholerae. Esto se atribuye a la distribución domiciliaria de doxicilina por parte del Sector Salud del gobierno del Estado


Subject(s)
Humans , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Carrier State/microbiology , Cholera/epidemiology , Feces/microbiology , Vibrio cholerae/isolation & purification , Mexico/epidemiology , Prevalence
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