RESUMO

OBJECTIVE: The aim of this study was to explore the association between MS and vitamin D levels, as well as Epstein-Barr virus (EBV) seropositivity and smoking history in a Colombian population. METHODS: We conducted a cross-sectional study between 2017 and 2018. We measured vitamin D levels and EBV antibody titers and administered a questionnaire to assess dietary habits, smoking, second-hand smoking and duration of smoking, sunlight exposure, physical activity, and personal and family history in individuals with and without multiple sclerosis during adolescence. A multivariable logistic regression model was then performed to explore the association between vitamin D status and MS. RESULTS: A total of 87 individuals with MS (mean age 40.9 years; 65.52% females) and 87 without MS (mean age 55 years; 65.52% females) were included in the analysis. In the multivariable analysis, after controlling for supplementation vitamin D levels did not differ between both groups and no difference was found regarding tobacco smoke exposure. The proportion of individuals who tested positive for anti-EBV nuclear antigen was significantly higher in individuals with MS (95.4% vs 82.76%, p = 0.028) CONCLUSION: : We did not find a statistically significant association between MS and vitamin D levels while anti-EBV nuclear antigen titers behaved as previously described in the literature. This study provides new evidence of the association between MS and different risk factors in our country, reinforcing the hypothesis that the pathogenesis of MS is multifactorial. Further studies are needed to better define the association between environmental factors and the development of MS in low prevalence areas.

Assuntos

Infecções por Vírus Epstein-Barr/epidemiologia , Antígenos Nucleares do Vírus Epstein-Barr/sangue , Esclerose Múltipla/epidemiologia , Fumar/epidemiologia , Vitamina D/sangue , Adulto , Colômbia/epidemiologia , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Luz Solar

RESUMO

Abstract Background: We depict the experience with the use of thrombolysis for acute ischemic stroke in a tertiary center in South America. Objective: To describe the main outcomes in our population of patients aged less and older than 80 years treated with recombinant tissue plasminogen activator. Materials and Methods: Retrospective observational study. We described the main variables and the difference in outcome accounting for age. Results: 70 patients were included. 51.4% of the patients were women, 22.8% were older than 80 years. The average window time was 70 minutes and the average door-to-needle time was 90 minutes. Hypertension, dyslipidemia and previous stroke were the most common risk factors. Favorable outcome Modified Rankin Scale ≤2 was present in 25% of the patients older than 80 years and 53.7% in the population younger than 80 years (p=0.009). Mortality was present in 31.2% of the patients older than 80 years and in 5.5% of the patients younger than 80 years (p=0.005). Symptomatic intra-cerebral hemorrhage was found in 6.25% of the patients older than 80 years (p=0.65), compared to 3.7% in the younger than 80 years. Conclusions: We found that intravenous thrombolysis still had benefit in people older than 80 years. Significant differences in symptomatic intra-cerebral hemorrhage were not found, however, a greater mortality in patients older than 80 years was. These findings of our experience of recombinant tissue plasminogen activator use in real life are consistent with other latinamerican publications. MÉD.UIS. 2017;30(3):21-30.

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Resumen Introducción: Describimos la experiencia con el uso de trombólisis para el infarto cerebral isquémico agudo en un centro terciario en América del Sur. Objetivos: Describir los principales resultados en nuestra población de pacientes menores y mayores de 80 años tratados con activador recombinante de plasminógeno tisular. Materiales y Métodos: Estudio observacional retrospectivo. Se describieron las principales variables y se determinaron los resultados según la edad. Resultados: Se incluyeron 70 pacientes. Se encontró que 51,4% eran mujeres y 22,8% eran mayores de 80 años. El tiempo de ventana promedio estuvo en 70 minutos, así como el de puerta-aguja de 90 minutos. La hipertensión, dislipidemia y accidente cerebrovascular previo fueron los factores de riesgo más comunes. En el 25% de los pacientes mayores de 80 años y el 53,7% de los menores de 80 años, tuvieron un resultado favorable en la Escala Modificada de Rankin ≤ 2 (p = 0,009). La mortalidad estuvo presente en el 31,2% de los pacientes mayores de 80 años y en el 5,5% de los pacientes menores de 80 años (p = 0,005). La hemorragia intracerebral sintomática fue de 6,25% en los pacientes mayores de 80 años, frente a los menores de 80 años 3,7% (p = 0,65). Conclusiones: Se encontró que la trombólisis todavía presenta beneficio en personas mayores de 80 años. No se encontraron diferencias en cuanto a la hemorragia intra-cerebral sintomática, pero se presentó una mayor mortalidad en los mayores de 80 años. En esta experiencia el uso de rt-PA en la vida real es consistente con otras publicaciones latinoamericanas. MÉD.UIS. 2017;30(3):21-30.

Assuntos

Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Idoso , Idoso de 80 Anos ou mais , Terapia Trombolítica , Acidente Vascular Cerebral , Idoso , Idoso Fragilizado , Ativador de Plasminogênio Tecidual , Dislipidemias , Fibrinolíticos , Hipertensão

RESUMO

OBJECTIVE: The aim of this study was to determine ancestry informative markers, mitochondrial DNA haplogroups, and the association between HLA-DRB1 alleles and multiple sclerosis (MS) in a group of patients from Bogotá, Colombia. METHODS: In this case-control study, genomic DNA was isolated and purified from blood samples. HLA-DRB1 allele genotyping was done using PCR. Mitochondrial hypervariable region 1 was amplified and haplogroups were determined using HaploGrep software. Genomic ancestry was estimated by genotyping a panel of ancestry informative markers. To test the association of HLA polymorphisms and MS, we ran separate multivariate logistic regression models. Bonferroni correction was used to account for multiple regression tests. RESULTS: A total of 100 patients with MS (mean age 40.4 ± 12 years; 70% females) and 200 healthy controls (mean age 37.6 ± 11 years; 83.5% females) were included in the analysis. Ancestry proportions and haplogroup frequencies did not differ between patients and controls. HLA-DRB1*15 was present in 31% of cases and 13.5% of controls, whereas HLA-DRB1*14 was present in 5% of cases and 15.5% of controls. In the multivariate model, HLA-DRB1*15 was significantly associated with MS (odds ratio [OR] = 3.05, p < 0.001), whereas HLA-DRB1*14 was confirmed as a protective factor in our population (OR = 0.16, p = 0.001). CONCLUSIONS: This study provides evidence indicating that HLA-DRB1*15 allele confers susceptibility to MS and HLA-DRB1*14 allele exerts resistance to MS in a highly admixed population. This latter finding could partially explain the low prevalence of MS in Bogotá, Colombia.