Cédric F. Invernizzi

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We propose that a nucleotide template-based mechanism facilitates the acquisition of the K65R mutation in subtype C human immunodeficiency virus type 1 (HIV-1). Different patterns of DNA synthesis were observed using DNA templates from viruses of subtype B or C origin. When subtype C reverse transcriptase (RT) was employed to synthesize DNA from subtype C(More)
The HIV-1 Rev protein mediates nuclear export of unspliced and partially spliced viral RNA through interaction with the Rev response element (RRE) by means of an arginine rich motif that is similar to the one found in Tat. Since Tat is known to be asymmetrically arginine dimethylated by protein arginine methyltransferase 6 (PRMT6) in its arginine rich(More)
Recently, we described a novel nucleotide template-based mechanism that may be the basis for the facilitated acquisition of the K65R resistance mutation in subtype C versus subtype B human immunodeficiency virus type 1 (HIV-1). In this article, we evaluated the effects of subtype C-specific silent polymorphisms in cell culture drug-selection experiments(More)
Arginine methylation has been shown to regulate signal transduction, protein subcellular localization, gene transcription, and protein-protein interactions that ultimately alter gene expression. Although the role of cellular protein arginine methyltransferases (PRMT) in viral gene expression is largely unknown, we recently showed that the Tat protein of(More)
BACKGROUND We have shown that the K65R resistance mutation in HIV type-1 (HIV-1) reverse transcriptase (RT) is selected more rapidly in subtype C than subtype B HIV-1 in biochemical, cell culture and clinical studies. Template-usage experiments demonstrated that subtype C nucleotide coding sequences caused RT to preferentially pause, leading to K65R(More)
Numerous studies have suggested that the K65R reverse transcriptase (RT) mutation develops more readily in subtype C than subtype B HIV-1. We recently showed that this discrepancy lies partly in the subtype C template coding sequence that predisposes RT to pause at the site of K65R mutagenesis. However, the mechanism underlying this observation and the(More)
OBJECTIVE The HIV-1 nucleocapsid protein (NC) is involved in transfer RNA3 annealing to the primer binding site of viral genomic RNA by means of two basic regions that are similar to the N-terminal portion of the arginine-rich motif (ARM) of Tat. As Tat is known to be asymmetrically arginine dimethylated by protein arginine methyltransferase 6 (PRMT6) in(More)
OBJECTIVES To determine the underlying biochemical mechanisms responsible for the diminished viral replicative capacity associated with K65R/M184V-containing viruses. METHODS We studied the efficiency of (-)ssDNA synthesis by recombinant wild-type and mutated HIV-1 reverse transcriptases in cell-free assays. In addition, we determined susceptibility(More)
OBJECTIVES We recently reported the preferential selection of the K65R resistance mutation in subtype C HIV-1 compared with subtype B and showed the underlying mechanism to be dependent on subtype C-specific silent nucleotide polymorphisms, i.e. genomic mutations that change the genotype but not the phenotype. The number of clinical reports demonstrating(More)
OBJECTIVE a) To assess the suitability of the curriculum content and didactical quality of information delivered to educate journalists in the J2J program in HIV/AIDS (process evaluation) and b) to explore the effects of such programs on journalists' reporting of HIV/AIDS related information (outcome evaluation). DESIGN Descriptive study. METHODS For(More)