Abstract
: The HIV-1 integrase E157Q natural polymorphism has been reported to cause one case of raltegravir (RAL) and dolutegravir (DTG) failure. Six recombinant viruses were constructed containing integrase from clinical HIV-1 isolates found to harbour E157Q as the only integrase strand inhibitor (INSTI) resistance-related mutation. Phenotypic analysis showed that E157Q results in minimal changes in RAL and DTG susceptibility. Together with data retrieved from the Stanford HIV database, our results indicate that E157Q is not a relevant INSTI resistance mutation per se. The previously reported case of E157Q-based resistance must have resulted from combined as yet unidentified integrase polymorphisms.
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