RESUMO
OBJECTIVE: To explore the association between physical activity levels and nutritional biomarkers in hemodialysis patients. METHODS: Eighty-six patients responded to the short version of the International Physical Activity Questionnaire to estimate the metabolic equivalent of tasks (MET) per week. A MET-min per week <600 was considered as sedentary. The nutritional biomarkers (i.e., albumin, globulin, and albumin/globulin ratio) were collected. RESULTS: Sixty-five patients (75.6%) were sedentary. Binary logistic regression showed that patients with low albumin levels had an 89% lower chance to be physically active (p = 0.037), but it was not significant in the adjusted analysis (p = 0.052). Albumin and albumin/globulin ratio levels were correlated with MET-min per week (r = 0.34 and 0.30; both p < 0.05). Additionally, lower median albumin and albumin/globulin ratio levels were found in the sedentary patients (p = 0.021 and p = 0.031), respectively. CONCLUSION: The physical activity levels were associated with albumin and albumin/globulin ratio, surrogates of nutritional status in hemodialysis patients. These nutritional biomarkers were lower in sedentary patients.
Assuntos
Exercício Físico , Diálise Renal , Albuminas , Biomarcadores , Estudos Transversais , Humanos , Estado NutricionalRESUMO
OBJECTIVE: To verify the presence of anti-rotavirus serotype G9P[5] SIgA and the virus neutralization capacity of milk samples from Brazilian women. METHODS: SIgA antibody levels reactive to rotavirus G9 were determined in 30 maternal milk samples by enzyme-linked immunosorbent assay (ELISA) using purified virus suspensions. The samples' capacity to neutralize rotavirus G9P[5] was analyzed using the MA-104 cells neutralization assay. RESULTS: Great individual variations were observed regarding the SIgA levels and neutralization titers, but all samples showed some G9P[5] neutralizing ability. A highly significant positive correlation was observed between antibody levels and neutralization titers. CONCLUSIONS: The high correlation between anti-rotavirus antibody levels and neutralizing capacity of the milk samples suggests a possible protective role of these antibodies against infection. These results also support the encouragement of the breast-feeding practice.
Assuntos
Anticorpos Neutralizantes/fisiologia , Anticorpos Antivirais/imunologia , Imunoglobulina A Secretora/química , Leite Humano/imunologia , Rotavirus/imunologia , Adulto , Aleitamento Materno , Linhagem Celular/virologia , Ensaio de Imunoadsorção Enzimática , Feminino , Humanos , Leite Humano/virologia , Testes de Neutralização/métodos , Rotavirus/classificação , Rotavirus/isolamento & purificação , Sorotipagem , Estatísticas não Paramétricas , Adulto JovemRESUMO
OBJETIVO: Verificar a presença de SIgA anti-rotavírus sorotipo G9P[5] e a capacidade de neutralização do vírus de amostras de leite de mulheres brasileiras. MÉTODOS: Foram determinados os níveis de anticorpos SIgA reativos contra rotavírus G9 em 30 amostras de leite materno por ELISA usando suspensões purificadas do vírus. A capacidade das amostras de neutralizarem o rotavírus G9P[5] foi analisada em ensaio de de Neutralização utilizando células MA-104. RESULTADOS: Foram observadas grandes variações individuais referentes aos níveis de SIgA e títulos de neutralização, mas todas as amostras mostraram certa capacidade de neutralizar o G9P[5]. Verificamos uma correlação positiva altamente significativa entre os níveis de anticorpos e os títulos de neutralização. CONCLUSÕES: A alta correlação entre níveis de anticorpos anti-rotavírus e a capacidade neutralizante das amostras de leite sugere um possível papel protetor desses anticorpos contra a infecção. Esses resultados também apoiam o incentivo à prática do aleitamento materno.
OBJECTIVE: To verify the presence of anti-rotavirus serotype G9P[5] SIgA and the virus neutralization capacity of milk samples from Brazilian women. METHODS: SIgA antibody levels reactive to rotavirus G9 were determined in 30 maternal milk samples by enzyme-linked immunosorbent assay (ELISA) using purified virus suspensions. The samples' capacity to neutralize rotavirus G9P[5] was analyzed using the MA-104 cells neutralization assay. RESULTS: Great individual variations were observed regarding the SIgA levels and neutralization titers, but all samples showed some G9P[5] neutralizing ability. A highly significant positive correlation was observed between antibody levels and neutralization titers. CONCLUSIONS: The high correlation between anti-rotavirus antibody levels and neutralizing capacity of the milk samples suggests a possible protective role of these antibodies against infection. These results also support the encouragement of the breast-feeding practice.