RESUMO
It has been recently proposed that exposure to polychlorinated biphenyls (PCBs) is a risk factor to type 2 diabetes mellitus (DM2). We investigated this hypothesis using long-term in vivo PCB126 exposure to rats addressing metabolic, cellular and proteomic parameters. Male Wistar rats were exposed to PCB126 (0.1, 1 or 10 µg/kg of body weight/day; for 15 days) or vehicle by intranasal instillation. Systemic alterations were quantified by body weight, insulin and glucose tolerance, and blood biochemical profile. Pancreatic toxicity was measured by inflammatory parameters, cell viability and cycle, free radical generation, and proteomic profile on islets of Langerhans. In vivo PCB126 exposure enhanced the body weight gain, impaired insulin sensitivity, reduced adipose tissue deposit, and elevated serum triglycerides, cholesterol, and insulin levels. Inflammatory parameters in the pancreas and cell morphology, viability and cycle were not altered in islets of Langerhans. Nevertheless, in vivo PCB126 exposure increased free radical generation and modified the expression of proteins related to oxidative stress on islets of Langerhans, which are indicative of early ß-cell failure. Data herein obtained show that long-term in vivo PCB126 exposure through intranasal route induced alterations on islets of Langerhans related to early end points of DM2.
Assuntos
Ilhotas Pancreáticas/efeitos dos fármacos , Estresse Oxidativo/efeitos dos fármacos , Bifenilos Policlorados/toxicidade , Proteoma/efeitos dos fármacos , Tecido Adiposo/metabolismo , Administração Intranasal , Animais , Peso Corporal/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Colesterol/sangue , Glucose/metabolismo , Insulina/sangue , Ilhotas Pancreáticas/citologia , Ilhotas Pancreáticas/metabolismo , Rim/efeitos dos fármacos , Rim/metabolismo , Metabolismo dos Lipídeos/efeitos dos fármacos , Fígado/efeitos dos fármacos , Fígado/metabolismo , Masculino , Óxido Nítrico/metabolismo , Ratos , Ratos Wistar , Triglicerídeos/sangue , Regulação para Cima/efeitos dos fármacosRESUMO
OBJECTIVE: To assess the impact of multiple sclerosis (MS) on the professional life of Brazilian patients. METHOD: One hundred MS patients were randomly selected from the database of the Brazilian Multiple Sclerosis Association (ABEM). An individual interview was carried out by telephone by a member of ABEM, who collected data on the patients' clinical status, educational level and professional lives. RESULTS: Complete data were obtained from 96 patients (27 males and 69 females) aged 55.0±14.1 years, with average disease duration of 4.6±4.0 years). Eighty percent had eleven or more years of schooling. Among the whole group, 66 percent did not present limitations on walking. The longer the disease duration and the older the patient were, the higher the chances were that the patient was retired or receiving workers' compensation benefits. However, even among patients with MS for less than five years, the rate of non-participation in the workforce was 47.7 percent. Fatigue, paresthesia, cognitive dysfunction and pain were often cited as the motives for not working. CONCLUSION: MS patients presented high levels of unemployment, retirement and receipt of workers' compensation benefits, despite their high schooling levels. Age, disease duration and disability influenced these results for the whole group. However, even among younger patients with shorter disease duration and low disability, this finding remained.
OBJETIVO: Avaliar o impacto da esclerose múltipla (EM) na vida profissional de pacientes brasileiros. MÉTODO: Cem pacientes com EM foram aleatoriamente selecionados da base de dados da Associação Brasileira de Esclerose Múltipla (ABEM). Uma entrevista individual por telefone foi realizada por um membro da ABEM que obteve dados sobre a condição clínica e a vida educacional e profissional dos pacientes. RESULTADOS: Dados completos foram obtidos de 96 pacientes (27 homens, 69 mulheres; idade 55,0±14,1 anos com um tempo médio de doença de 4,6±4,0 anos). Oitenta por cento deles tinham onze ou mais anos de estudo. Do grupo total, 66 por cento não apresentavam limitações para deambular. Quanto maior o tempo de doença e quanto mais velho o paciente, maior a chance que estivesse aposentado ou recebendo auxílio financeiro por afastamento. No entanto, mesmo os pacientes com menos de cinco anos de EM tinham um índice de ausência da força de trabalho de 47,7 por cento. Fadiga, parestesias, alterações cognitivas e dor foram frequentemente citadas como causas para não estar trabalhando. CONCLUSÃO: Pacientes com EM têm um alto índice de desemprego, aposentadoria e afastamento do trabalho apesar da alta escolaridade. Idade, duração da doença e incapacidade influenciaram estes achados. No entanto, estes resultados se mantiveram mesmo em pacientes mais jovens com menor tempo de doença e pouca incapacidade.
Assuntos
Adolescente , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Absenteísmo , Esclerose Múltipla/complicações , Qualidade de Vida , Brasil , Doença Crônica , Escolaridade , Entrevistas como Assunto , Esclerose Múltipla/psicologiaRESUMO
OBJECTIVE: To assess the impact of multiple sclerosis (MS) on the professional life of Brazilian patients. METHOD: One hundred MS patients were randomly selected from the database of the Brazilian Multiple Sclerosis Association (ABEM). An individual interview was carried out by telephone by a member of ABEM, who collected data on the patients' clinical status, educational level and professional lives. RESULTS: Complete data were obtained from 96 patients (27 males and 69 females) aged 55.0±14.1 years, with average disease duration of 4.6±4.0 years). Eighty percent had eleven or more years of schooling. Among the whole group, 66% did not present limitations on walking. The longer the disease duration and the older the patient were, the higher the chances were that the patient was retired or receiving workers' compensation benefits. However, even among patients with MS for less than five years, the rate of non-participation in the workforce was 47.7%. Fatigue, paresthesia, cognitive dysfunction and pain were often cited as the motives for not working. CONCLUSION: MS patients presented high levels of unemployment, retirement and receipt of workers' compensation benefits, despite their high schooling levels. Age, disease duration and disability influenced these results for the whole group. However, even among younger patients with shorter disease duration and low disability, this finding remained.