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Updated: Mar 8, 2026
05:46
Rapid Screening of HIV Reverse Transcriptase and Integrase Inhibitors
Published on: April 9, 2014
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Different Pathways Leading to Integrase Inhibitors Resistance
Eloïse Thierry1, Eric Deprez1, Olivier Delelis1
1Laboratoire de Biologie et Pharmacologie Appliquée, CNRS UMR8113, Ecole Normale Supérieure de Cachan, Université Paris-Saclay Cachan, France.
Frontiers in Microbiology
|January 27, 2017
Summary
Integrase strand-transfer inhibitors (INSTIs) are vital HIV drugs. New research explores how HIV might resist dolutegravir (DTG) without typical mutations, possibly through unintegrated viral DNA.
Area of Science:
- Virology
- Molecular Biology
- Immunology
Background:
- Integrase strand-transfer inhibitors (INSTIs) are key antiretroviral drugs for HIV treatment, inhibiting viral DNA integration into host cells.
- While resistance pathways for raltegravir (RAL) are understood, recent cases show treatment failure with dolutegravir (DTG) lacking clear integrase mutations.
Purpose of the Study:
- To investigate alternative mechanisms of INSTI resistance, particularly for dolutegravir (DTG), in HIV-infected patients.
- To explore the role of unintegrated viral DNA in the development of HIV treatment resistance.
Main Methods:
- Analysis of clinical data from patients experiencing DTG treatment failure without identified integrase resistance mutations.
- Investigation of the biological pathways involving unintegrated viral DNA, including 2-long terminal repeat circles and viral DNA expression.
Main Results:
- Accumulation of unintegrated circular viral DNA forms is a consequence of INSTI action.
- Two potential resistance mechanisms involving unintegrated viral DNA were identified: integration of 2-long terminal repeat circles and expression of viral DNA leading to particle production.
Conclusions:
- Unintegrated viral DNA may play a significant role in INSTI resistance, offering new targets for therapeutic strategies.
- Further research is needed to fully elucidate these novel resistance mechanisms and their clinical implications for HIV management.
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