Résumé
INTRODUCTION: Snake envenomings are a health problem in rural areas of tropical and subtropical countries, but little is known regarding the immune response presented by bitten individuals. The IgM production of patients bitten by Bothrops erythromelas snake was analyzed to identify the effectiveness of treatment in this type of envenomation. METHODS: Bothrops erythromelas venom was submitted to electrophoresis and transferred to a nitrocellulose sheet, following incubation with patients' sera. RESULTS: A 38 KDa protein was detected before and 24 h after therapy. CONCLUSIONS: The result suggests that this protein could be used as a marker for individuals envenomed by Bothrops. erythromelas.
INTRODUÇÃO: Envenenamentos ofídicos consistem problema de saúde pública em áreas rurais de países tropicais e subtropicais, mas pouco sabe-se sobre a resposta imune apresentada pelos indivíduos picados, por isso a avaliação da produção de IgM por pacientes picados por Bothrops erythromelas identificando a eficácia do tratamento nesse tipo de envenenamento. MÉTODOS: O veneno de Bothrops erythromelas foi submetido a eletroforese e transferido para nitrocelulose, seguindo incubação com soro de pacientes. RESULTADOS: Foi observada proteína de 38KDa antes e 24 horas após o tratamento. CONCLUSÕES: Os resultados sugerem que essa proteína poderia ser utilizada como marcador para indivíduos envenenados pela serpente Bothrops erythromelas.
Sujets)
Animaux , Humains , Sérums antivenimeux/immunologie , Bothrops , Venins de crotalidé/immunologie , Immunité humorale/immunologie , Immunoglobuline M/biosynthèse , Morsures de serpent/immunologie , Sérums antivenimeux/administration et posologie , Technique de Western , Morsures de serpent/traitement médicamenteux , Facteurs tempsRésumé
Specific IgG and IgM responses to soluble egg antigen (SEA) and keyhole limpet haemocyanin (KLH) were measured by ELISA in patients with acute and chronic schistosomiasis. The tests based upon IgM and IgG antibodies responses to KLH presented the best diagnostic discrimination, and can be used in conjunction with clinical and epidemiological data to the differential diagnosis of acute schistosomiasis.
Sujets)
Humains , Animaux , Antigènes d'helminthe , Schistosoma mansoni , Schistosomiase à Schistosoma mansoni , Maladie aigüe , Anticorps antihelminthe , Marqueurs biologiques , Maladie chronique , Test ELISA , Immunoglobuline G , Immunoglobuline M , Sensibilité et spécificitéRésumé
Sm8 is a major tegumental antigen of Schistosoma mansoni. The partial cDNA was isolated and analyzed. Sequence analysis revealed transmembrane compatible hydrophobic domains and a putative leucine zipper pattern. The mRNA and the protein are predominantly expressed in adult worms
Sujets)
Animaux , Antigènes d'helminthe , Protéines d'helminthes , Schistosoma mansoni , Séquence d'acides aminés , Antigènes d'helminthe , Séquence nucléotidique , Technique de Western , ADN complémentaire , Données de séquences moléculaires , ARN des helminthesRésumé
Sm15 and Sm13 are recognized by antibodies from mice protectely vaccinated with tegumental membranes, suggesting a potencial role in protective immunity. In order to raise antibodies for immunochemical investigations, the genes for these antigens were expressed in pGEX and pMAL vectors so that comparisons could be made among different expression systems and different genes. The fusion proteins corresponding to several parts of the gene for the precursor of Sm15 failed in producing antibodies recognizing the parasite counterpart. On the other hand, antibodies raised against Sm13 MBP-fusion proteins recognized the 13 kDa tegumental protein. Thus the peculiarities of the gene of interest are important and the choice of the expression system must sometimes be decided on an impirical basis.