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Putting pressure on HIV
Type 1 interferons provide early host immune defense against viruses, including HIV-1, by promoting expression of proteins that have direct or indirect antiviral activity. It remains unclear how viruses that persist long term, such as HIV-1, escape type 1 interferon–mediated pressure. Gondim et al. characterize interferon resistance in HIV-1 isolates acquired from HIV-1–infected individuals over several years. The authors found that HIV-1 isolates acquired at the time of initial infection or during interruption of antiretroviral therapy were the most resistant to type 1 interferons. These findings underpin the importance of type 1 interferons in controlling HIV-1 infection in the host.
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