Words similar to proviral
Example sentences for: proviral
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Cyclin D 1 is characterized as the major D-type cyclin controlling G 1 -phase progression in kidney cells, both during normal and abnormal proliferation [ 22 23 ] . To determine whether cyclin D 1 may be active in promoting G 1 → S progression in kidneys expressing HIV-1 genes, we utilized a well-characterized HIV-1 transgenic mouse model (Tg26) of HIVAN [ 11 12 13 ] . Secondary to renal expression of the HIV-1 NL4-3 Δ gag-pol proviral transgene, adolescent Tg26 transgenics develop a progressive, proliferative renal disease marked by podocyte and tubular epithelial hyperplasia that is indistinguishable both clinically and histopathologically from human HIVAN.
It is not surprising that proviral latency, in which low levels of transcription or only short HIV transcripts containing TAR are observed, would in large part reflect the absence of these activators.
[ 11 12 13 14 ] . Kidney transplants between normal and transgenic Tg26 siblings suggested that specific HIV-1 proteins within the kidney, and not circulating factors, transform infected renal epithelium [ 13 ] . Indeed, HIV-1 transgenic mice generated with an HIV-1 proviral construct mutated in the Nef "PXXP" SH3-binding motif for Src-family kinases failed to develop nephropathy [ 31 ] , and a recent in vitro analysis of podocytes infected with single gene mutants of HIV-1 further suggest that Nef plays a central role in causing the proliferative phenotype in HIVAN [ 8 ] . Utilizing these same single gene mutant viruses, we showed here that Nef appears to be play a role in the up-regulation of cyclin D 1 by HIV-1 in vitro . Importantly, these single gene mutants do not exclude the possibility that other HIV-1 gene(s) may cooperate with nef to induce cyclin D1, particularly
Infection of cultured podocytes with replication incompetent HIV-1 demonstrated that HIV-1 gene expression leads to the proliferation and dedifferentiation of the infected podocytes [ 6 7 8 ] , recapitulating the phenotypes observed in HIVAN specimens [ 9 10 ] . Similarly, renal expression of replication incompetent HIV-1 proviral transgenes in mice and rats produces a proliferative renal lesion that is indistiguisable both histopathologically and clinically from human HIVAN [ 11 12 13 14 ] . These observations raise the possibility that HIV-1 gene products may interact with mitogenic pathways in infected renal epithelium to cause aberrant cell-cycle engagement.
Data on log 10 proviral load were available from 38 of 46 HTLV-I subjects (mean = -2.
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