A conditional RNA Pol II mono-promoter drives HIV-inducible, CRISPR-mediated cyclin T1 suppression and HIV inhibition.
A conditional RNA Pol II mono-promoter drives HIV-inducible, CRISPR-mediated cyclin T1 suppression and HIV inhibition.
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DOI:
10.1016/j.omtn.2023.04.011
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发表时间:
2023-06-13
期刊:
影响因子:
--
通讯作者:
Unwalla, Hoshang J.
中科院分区:
文献类型:
--
作者:
Chinnapaiyan, Srinivasan;Santiago, Maria-Jose;Panda, Kingshuk;Rahman, Md. Sohanur;Alluin, Jessica;Rossi, John;Unwalla, Hoshang J.
Gene editing using clustered regularly interspaced short palindromic repeats (CRISPR) targeted to HIV proviral DNA has shown excision of HIV from infected cells. However, CRISPR-based HIV excision is vulnerable to viral escape. Targeting cellular co-factors provides an attractive yet risky alternative to render viral escape irrelevant. Cyclin T1 is a critical modulator of HIV transcription and mediates recruitment of positive transcription elongation factor-b (P-TEFb) kinase for transcriptional elongation. Hence, a CRISPR-mediated cyclin T1 inactivation will silence HIV transcription, locking it in an inactive form in the cell and thereby serving as an effective antiviral and possibly effecting a functional cure. However, cellular genes play important roles, and their uncontrolled inhibition can promote undesirable effects. Here, we demonstrate a conditional inducible RNA polymerase II (RNA Pol II) mono-promoter-based co-expression of a CRISPR system targeting cyclin T1 from a single transcription unit. Co-expression of guide RNA (gRNA) and CRISPR-associated protein (Cas9) is observed only in HIV-infected cells and leads to sustained HIV suppression in stringent chronically infected cell lines as well as in T cell lines. We further show that incorporation of cis-acting ribozymes immediately upstream of the gRNA further enhances HIV silencing. The bulk of the HIV reservoir is transcriptionally active and expresses viral proteins that are responsible for non-AIDS comorbidities in the cART era. Approaches targeting HIV RNA/DNA are largely ineffectual due to escape mutants. CRISPR-based inactivation of critical cellular co-factors only in HIV-infected cells can silence HIV in these reservoirs.
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影响因子:
23.9
作者:
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通讯作者:
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