Is mRNA and protein level of CD46 altered in measles virus vaccine strain S191-infected cells?

Biochemical and Biophysical Research Communications
Chunling HuXi Chen

Abstract

Previous research showed that the expression of measles virus receptor CD46 was downregulated after expression of measles virus hemagglutinin protein on the surface of the virus infected cell or triggered by infected cell-to-cell contact. We reported here that the mRNA level of CD46 in MV infected cells was not changed which was tested by real-time quantitative PCR. To further analyse the surface expression alteration of CD46 after MV infection, flow cytometric analysis and indirect immunofluorescence were used to detect the protein level of CD46. Altogether, our results provided a demonstration that the expression of CD46 was not downregulated by the infection of MV strain S191 both on mRNA level and cellular surface protein level. Previous results reported that the "downregulation" of CD46 expression on the cell surface may take place because H protein masks the antibody recognition site on CD46 which results in "downregulation" of the expression of CD46.

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