Abstract
N6-methyladenosine (m6A) modification of RNA is an important area in studying viral replication, cellular responses, and host immunity. HIV-1 RNA contains multiple m6A modifications that regulate viral replication and gene expression. HIV-1 infection of CD4+ T-cells or HIV-1 envelope protein treatment upregulates m6A levels of cellular RNA. Changes in the m6A modification of cellular transcripts in response to HIV-1 infection provide new insights into the mechanisms of posttranscriptional gene regulation in the host cell. To better investigate the functions of m6A modification in HIV-1 infection and innate immune responses, it is helpful to standardize basic protocols. Here, we describe a method for the selective enrichment of m6A-modified RNA from HIV-1-infected primary CD4+ T-cells based on immunoprecipitation. The enriched RNA with m6A modifications can be used in a variety of downstream applications to determine the methylation status of viral or cellular RNA at resolution from transcript level down to single nucleotide.
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