CONTEXT AND OBJECTIVE:Several studies have evaluated the role of low 25-hydroxyvitamin D (25OHD3) in the pathogenesis of type 2 diabetes (T2DM) and have presented controversial results. The metabolic processes that culminate in T2DM begin under prediabetic conditions. Our aim was to analyze the association between 25OHD3 and glucose metabolism in individuals who were free from but at elevated risk of diabetes.DESIGN AND SETTING:Cross-sectional study at a tertiary hospital.METHODS:Anthropometric and laboratory profiles were determined in patients with one or more of the following risk factors: hypertension; body mass index (BMI) ≥ 25 kg/m2; waist circumference > 80 cm for women and > 94 cm for men; first-degree relatives with diabetes; women with large-for-gestational-age newborns or with gestational T2DM; HDL-cholesterol (high density lipoprotein) < 35 mg/dl; and triglycerides > 250 mg/dl. The patients were divided into two groups: one with prediabetes (abnormal fasting plasma glucose or oral glucose tolerance test) and the other with normal glucose (euglycemic).RESULTS:There was no statistically significant difference between the prediabetic group (n = 38) and euglycemic group (n = 15) regarding age (66.4 ± 10.6 versus 62.6 ± 9.1 years), gender (52.6 versus 73.3% female) and BMI (30.1 ± 4.61 versus 27.9 ± 4.7 kg/m2). Low serum levels of 25OHD3 were found in both groups, without any statistically significant difference between them (29.1 ± 11.8 versus 26.87 ± 9.2 ng/dl).CONCLUSION:There was no association between 25OHD3 levels and the clinical or laboratorial variables analyzed.
CONTEXTO E OBJETIVO:Vários estudos já avaliaram o papel da 25-hidroxivitamina D (25OHD3) na patogênese do diabetes tipo 2 (DM2) e apresentaram resultados controversos. Os processos metabólicos que culminam no DM2 se iniciam no pré-diabetes. Nosso objetivo foi analisar a associação da 25OHD3 com o metabolismo glicêmico em indivíduos sem diagnóstico mas com alto risco para diabetes.TIPO DE ESTUDO E LOCAL:Estudo transversal em hospital terciário.MÉTODOS:Medidas antropométricas e laboratoriais foram determinadas em pacientes com um ou mais dos fatores de risco: hipertensão; índice de massa corpórea (IMC) ≥ 25 kg/m2; circunferência abdominal > 80 cm no sexo feminino e > 94 cm no sexo masculino; parentes de primeiro grau com diabetes; mulheres com filho nascido grande para idade gestacional ou com DM2 na gravidez; colesterol HDL (high density lipoprotein) < 35 mg/dl e triglicerídeo > 250 mg/dl. Os pacientes foram divididos em dois grupos: um com pré-diabetes (glicemia de jejum ou teste de tolerância oral à glicose alterados) e outro com glicose normal (euglicêmicos).RESULTADOS:Entre pré-diabéticos (n = 38) e euglicêmicos (n = 15) não houve diferença estatística na idade (66,4 ± 10,6 versus 62,6 ± 9,1 anos), gênero (52,6 versus 73,3% feminino) e IMC (30,1 ± 4,61 versus 27,9 ± 4,7 kg/m2). Baixos niveis séricos de 25OHD3 foram encontrados nos dois grupos, sem diferença estatística entre eles (29,1 ± 11,8 versus 26,87 ± 9,2 ng/dl).CONCLUSÃO:Não houve associação entre os níveis de 25OHD3 e as variáveis clínicas e laboratoriais analisadas.
The main purpose of the present study was to investigate the effects of low-level laser therapy (LLLT) used in two different fluencies on injured skeletal muscle after cryolesion by means of histopathological analysis and immunohistochemistry for COX-2. A total of sixty male Wistar rats were randomly distributed into three groups: injured animals without any treatment; 808 nm laser treated group, at 10 J/cm² and 808 nm laser treated group, at 50 J/cm². Each group was divided into two different subgroups (n=10) on days 6 and 13 post-injury. The results showed that the animals irradiated with laser at 10 J/cm² or 50 J/cm² presented the areas with cell infiltrate and pointed out to minor and mild areas with destroyed zones compared with the control group. Also, a COX-2 downregulation was noticed in the groups exposed to laser at two fluences evaluated in this study. Significant statistically differences (p<0.05) were noticed to collagen deposition in the laser treated animals, with the fluence of 50 J/cm² when compared to the other groups on day 13 post-surgery. Taken together, these results suggested that laser therapy could have positive effects on muscle repair in the rats after cryolesion.
OBJECTIVES: To correlate the importance of the ankle-brachial index in terms of cardiovascular morbimortality and the extent of coronary arterial disease amongst elderly patients without clinical manifestations of lower limb peripheral arterial disease. METHODS: We analyzed prospective data from 100 patients over 65 years of age with coronary arterial disease, as confirmed by coronary angiography, and with over 70% stenosis of at least one sub-epicardial coronary artery. We measured the ankle-brachial index immediately after coronary angiography, and a value of <0.9 was used to diagnose peripheral arterial disease. RESULTS: The patients' average age was 77.4 years. The most prevalent risk factor was hypertension (96%), and the median late follow-up appointment was 28.9 months. The ankle-brachial index was <0.9 in 47% of the patients, and a low index was more prevalent in patients with multiarterial coronary disease compared to patients with uniarterial disease in the same group. Using a bivariate analysis, only an ankle-brachial index of <0.9 was a strong predictive factor for cardiovascular events, thereby increasing all-cause deaths and fatal and non-fatal acute myocardial infarctions two- to three-fold. CONCLUSION: In elderly patients with documented coronary disease, a low ankle-brachial index (<0.9) was associated with the severity and extent of coronary arterial disease, and in late follow-up appointments, a low index was correlated with an increase in the occurrence of major cardiovascular events.