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RNA-directed gene editing specifically eradicates latent and prevents new HIV-1 infection.

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机构: [1]Department of Neuroscience, Center for Neurovirology and The Comprehensive NeuroAIDS Center, Temple University School of Medicine, Philadelphia, PA 19140 [2]Cancer Genome Institute, Fox Chase Cancer Center, Temple University School of Medicine, Philadelphia, PA 19111 [3]Department of Molecular Biology and Microbiology, Case Western Reserve University, Cleveland, OH 44106 [4]Laboratory of Stem Cell Biology, State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, China
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关键词: CRISPR/Cas9 | genome editing | latency | retrovirus | reservoir

摘要:
AIDS remains incurable due to the permanent integration of HIV-1 into the host genome, imparting risk of viral reactivation even after antiretroviral therapy. New strategies are needed to ablate the viral genome from latently infected cells, because current methods are too inefficient and prone to adverse off-target effects. To eliminate the integrated HIV-1 genome, we used the Cas9/guide RNA (gRNA) system, in single and multiplex configurations. We identified highly specific targets within the HIV-1 LTR U3 region that were efficiently edited by Cas9/gRNA, inactivating viral gene expression and replication in latently infected microglial, promonocytic, and T cells. Cas9/gRNAs caused neither genotoxicity nor off-target editing to the host cells, and completely excised a 9,709-bp fragment of integrated proviral DNA that spanned from its 5' to 3' LTRs. Furthermore, the presence of multiplex gRNAs within Cas9-expressing cells prevented HIV-1 infection. Our results suggest that Cas9/gRNA can be engineered to provide a specific, efficacious prophylactic and therapeutic approach against AIDS.

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第一作者机构: [1]Department of Neuroscience, Center for Neurovirology and The Comprehensive NeuroAIDS Center, Temple University School of Medicine, Philadelphia, PA 19140
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