Human antibody responses of patients living in endemic areas for schistosomiasis to the tegumental protein Sm29 identified through genomic studies

Cardoso, F. C., Pacífico, R. N. A., Mortara, R. A. and Oliveira, S. C. (2006) Human antibody responses of patients living in endemic areas for schistosomiasis to the tegumental protein Sm29 identified through genomic studies. Clinical and Experimental Immunology, 144 3: 382-391. doi:10.1111/j.1365-2249.2006.03081.x


Author Cardoso, F. C.
Pacífico, R. N. A.
Mortara, R. A.
Oliveira, S. C.
Title Human antibody responses of patients living in endemic areas for schistosomiasis to the tegumental protein Sm29 identified through genomic studies
Journal name Clinical and Experimental Immunology   Check publisher's open access policy
ISSN 0009-9104
1365-2249
Publication date 2006-06-01
Sub-type Article (original research)
DOI 10.1111/j.1365-2249.2006.03081.x
Volume 144
Issue 3
Start page 382
End page 391
Total pages 10
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
Surface proteins of schistosomes are exposed to host tissues and thus present as potential candidate molecules for the development of new intervention strategies. Herein, we have identified a new tegumental protein of Schistosoma mansoni, termed Sm29. In silico analysis revealed a signal peptide, three glycosylation sites and a transmembrane region on Sm29 amino acid sequence. Sm29 transcription in mammalian developmental stages cDNA libraries of S. mansoni was verified by PCR using specific primers for Sm29 nucleotide sequence and it revealed the presence of transcripts in schistosomula and adult worm stages of the parasite. Sm29 (40-169) fragment was produced in Escherichia coli and purified by affinity chromatography to be used in the immunological assays. Confocal microscopy confirmed bioinformatic studies, revealing that Sm29 is a membrane-bound protein localized on the tegument of S. mansoni adult worm. ELISA was performed using rSm29 protein to investigate the antibody isotype profile to Sm29 in sera of patients living in endemic areas for schistosomiasis. IgG1 and IgG3 subclass antibodies to rSm29 were predominant in sera of individuals naturally resistant to infection and resistant to re-infection whereas low levels of IgM, IgA or IgE were measured. Since, IgG1 and IgG3 are involved in parasite killing and in protective immunity the findings reported here suggest the use of Sm29 as a potential candidate vaccine against schistosomiasis.
© 2006 British Society for Immunology.
Keyword Sm29
Immunolocalization
Schistosoma mansoni
Vaccine
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Institute for Molecular Bioscience - Publications
 
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Created: Tue, 22 Mar 2011, 22:28:19 EST by Susan Allen on behalf of Institute for Molecular Bioscience