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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(1
): 498
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HIV-1-mediated insertional activation of STAT5B and BACH2 trigger viral reservoir
in T regulatory cells
#MMPMID28887441
Cesana D
; Santoni de Sio FR
; Rudilosso L
; Gallina P
; Calabria A
; Beretta S
; Merelli I
; Bruzzesi E
; Passerini L
; Nozza S
; Vicenzi E
; Poli G
; Gregori S
; Tambussi G
; Montini E
Nat Commun
2017[Sep]; 8
(1
): 498
PMID28887441
show ga
HIV-1 insertions targeting BACH2 or MLK2 are enriched and persist for decades in
hematopoietic cells from patients under combination antiretroviral therapy.
However, it is unclear how these insertions provide such selective advantage to
infected cell clones. Here, we show that in 30/87 (34%) patients under
combination antiretroviral therapy, BACH2, and STAT5B are activated by insertions
triggering the formation of mRNAs that contain viral sequences fused by splicing
to their first protein-coding exon. These chimeric mRNAs, predicted to express
full-length proteins, are enriched in T regulatory and T central memory cells,
but not in other T lymphocyte subsets or monocytes. Overexpression of BACH2 or
STAT5B in primary T regulatory cells increases their proliferation and survival
without compromising their function. Hence, we provide evidence that
HIV-1-mediated insertional activation of BACH2 and STAT5B favor the persistence
of a viral reservoir in T regulatory cells in patients under combination
antiretroviral therapy.HIV insertions in hematopoietic cells are enriched in
BACH2 or MLK2 genes, but the selective advantages conferred are unknown. Here,
the authors show that BACH2 and additionally STAT5B are activated by viral
insertions, generating chimeric mRNAs specifically enriched in T regulatory cells
favoring their persistence.