Another potential clinical application of CRISPR/Cas9 is to treat infectious diseases, such as HIV. Although antiretroviral therapy provides an effective treatment for HIV, no cure currently exists due to permanent integration of the virus into the host genome. Hu et al showed the CRISPR/Cas9 system could be used to target HIV-1 genome activity. This inactivated HIV gene expression and replication in a variety of cells which can be latently infected with HIV, without any toxic effects. Furthermore, cells could also be immunised against HIV-1 infection. This is a potential therapeutic advance in overcoming the current problem of how to eliminate HIV from infected individuals. After further refinement, the authors suggest their findings may enable gene therapies or transplantation of genetically altered bone marrow stem cells or inducible pluripotent stem cells to eradicate HIV infection.
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