| Autor: |
Soong CJ; Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio., Torian BE, Abd-Alla MD, Jackson TF, Gatharim V, Ravdin JI |
| Jazyk: |
angličtina |
| Zdroj: |
Infection and immunity [Infect Immun] 1995 Feb; Vol. 63 (2), pp. 472-7. |
| DOI: |
10.1128/iai.63.2.472-477.1995 |
| Abstrakt: |
The goal of our study was to obtain a highly conserved Entamoeba histolytica recombinant antigen for study as a subunit amebiasis vaccine. We screened a Uni-Zap cDNA library of E. histolytica (strain HM1:IMSS) with human immune sera and isolated a dominant 804-bp cDNA clone. A 33-kDa fusion protein expressed from the cDNA clone was determined by monoclonal antibody binding, DNA hybridization, and nucleotide sequence to be the complete E. histolytica 29-kDa antigen. Serum antibodies to the recombinant protein were detected by enzyme-linked immunosorbent assay in 80% of subjects from Egypt and South Africa with amebic liver abscess. Similar results were found with the native 29-kDa protein. Native and recombinant 29-kDa antigens induced proliferation of lymphocytes harvested from patients with amebic liver abscess (P < 0.01 compared with controls). Intraperitoneal immunization of gerbils with the recombinant fusion protein (10 micrograms) with Titermax adjuvant elicited an antigen-specific serum immunoglobulin G antibody response and was partially protective (54%) against intrahepatic challenge with 5 x 10(5) virulent axenic trophozoites (strain HM1:IMSS). In summary, the recombinant form of the E. histolytica 29-kDa antigen demonstrated serologic specificity for amebic liver abscess, exhibited conserved T-cell epitopes, and was effective as a subunit vaccine in an experimental animal model of amebic liver abscess. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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