Involvement of dsRNA virus in the protein composition and growth kinetics of host Trichomonas vaginalis

Archives of Virology
D ProvenzanoJ F Alderete

Abstract

Trichomonas vaginalis harbors a double-stranded (ds)-RNA virus, and the presence of virus is related to upregulated expression and phenotypic variation of a prominent immunogen (Khoshnan A, Alderete JF (1994) J Virol 68: 4035-4038). To further test the influence of virus on T. vaginalis, virus-infected (V+) isolates were compared to virus-free (V-), agar-cloned progeny trichomonads derived from the parental isolates for accumulation of total proteins and cysteine proteinases. Comparative high resolution two dimensional (2D)-SDS-PAGE was performed of trichomonads grown in a chemostat under identical conditions. At least 47 proteins were identified as specifically expressed by representative V+ isolate 347, and approximately 41 spots were specific to the corresponding V- progeny, showing an association between virus and the presence and absence of parasite proteins. Qualitatively and quantitatively dissimilar cysteine proteinase patterns were detected from numerous V+ isolates and the V- progeny. A 2D analysis for isolate 347 showed the appearance of unique proteinase activities for parental parasites and presence of at least one proteinase in the V- progeny. Finally, the V+ T. vaginalis isolate 347, but not the V- isolate 347 pr...Continue Reading

Citations

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