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Journal Article | Research Support, Non-U.S. Gov't

Identification of a T-helper cell epitope on the rotavirus VP6 protein.

D M Baños, S Lopez, C F Arias, F R Esquivel
D M Baños
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S Lopez
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C F Arias
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F R Esquivel
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ABSTRACT

In this work, we have studied the T-helper (Th)-cell response against rotavirus, in a mouse model. Adult BALB/c mice were inoculated parenterally with porcine rotavirus YM, and the Th-cell response from spleen cells against the virus and two overlapping fragments of the major capsid protein VP6 (VP6(1-192) and VP6(171-397)) were evaluated in vitro. The Th cells recognized the YM virus and the two protein fragments, suggesting that there are at least two Th-cell epitopes on the VP6 molecule. To study the specificity of Th cells against VP6 at the clonal level, we established two Th-cell hybridomas cross-reactive for the VP6 protein of rotavirus strains YM and SA11. Both hybridomas recognized the VP6(171-397) polypeptide, and a synthetic peptide comprising the amino acids 289 to 302 (RLSFQLVRPPNMTP) of YM VP6 in the context of the major histocompatibility complex class II IEd molecule. The Th-cell hybridomas recognized rotavirus VP6 in a highly cross-reactive fashion, since they could be stimulated by eight different strains of rotavirus, including the murine rotavirus EDIM, that represent five G serotypes and at least two subgroups. The amino acid sequence of the VP6 epitope is highly conserved in most group A rotavirus strains sequenced so far. On the other hand, it was found that Th cells specific for the VP6 epitope may constitute an important proportion of the total polyclonal Th-cell response against rotavirus YM in spleen cells. These results demonstrate that VP6 can be a target for highly cross-reactive Th cells.

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Identification of a T-helper cell epitope on the rotavirus VP6 protein.
D M Baños, S Lopez, C F Arias, F R Esquivel
Journal of Virology Jan 1997, 71 (1) 419-426; DOI:

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Identification of a T-helper cell epitope on the rotavirus VP6 protein.
D M Baños, S Lopez, C F Arias, F R Esquivel
Journal of Virology Jan 1997, 71 (1) 419-426; DOI:
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