Gag-Protease Sequence Evolution Following Protease Inhibitor Monotherapy Treatment Failure in HIV-1 Viruses Circulating in East Africa.

Sutherland, K.A., Goodall, R.L., McCormick, A.L., Kapaata, A., Lyagoba, F., Kaleebu, P., Thiltgen, G., Gilks, C.F., Spyer, M., Kityo, C., Pillay, D., Dunn, D. and Gupta, R.K. 2015. Gag-Protease Sequence Evolution Following Protease Inhibitor Monotherapy Treatment Failure in HIV-1 Viruses Circulating in East Africa. AIDS Research and Human Retroviruses. 31 (10), pp. 1032-1037.

TitleGag-Protease Sequence Evolution Following Protease Inhibitor Monotherapy Treatment Failure in HIV-1 Viruses Circulating in East Africa.
AuthorsSutherland, K.A., Goodall, R.L., McCormick, A.L., Kapaata, A., Lyagoba, F., Kaleebu, P., Thiltgen, G., Gilks, C.F., Spyer, M., Kityo, C., Pillay, D., Dunn, D. and Gupta, R.K.
Abstract

Around 2.5 million HIV-infected individuals failing first-line therapy qualify for boosted protease inhibitor (bPI)-based second-line therapy globally. Major resistance mutations are rarely present at treatment failure in patients receiving bPI and the determinants of failure in these patients remain unknown. There is evidence that Gag can impact PI susceptibility. Here, we have sequenced Gag-Protease before and following failure in 23 patients in the SARA trial infected with subtypes A, C, and D viruses. Before bPI, significant variation in Protease and Gag was observed at positions previously associated with PI exposure and resistance including Gag mutations L449P, S451N, and L453P and Protease K20I and L63P. Following PI failure, previously described mutations in Protease and Gag were observed, including those at the cleavage sites such as R361K and P453L. However, the emergence of clear genetic determinants of therapy failure across patients was not observed. Larger Gag sequence datasets will be required to comprehensively identify mutational correlates of bPI failure across subtypes.

JournalAIDS Research and Human Retroviruses
Journal citation31 (10), pp. 1032-1037
ISSN0889-2229
Year2015
PublisherMary Ann Liebert
Publisher's versionSutherland_etal_AidsResearch_2015-1.pdf
Digital Object Identifier (DOI)doi:10.1089/aid.2015.0138
Publication dates
Published10 Aug 2015

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