This is where the integrase enzyme comes into play. By binding to the active site of the enzyme, the inhibitors prevent the integrase from catalyzing the critical strand transfer reaction, where the viral DNA is joined to the host chromosome.
Mechanism of Action: How Integrase Inhibitors Block Viral DNA Integration
Clinical Impact and Therapeutic Applications In clinical practice, integrase inhibitors are utilized in various combinations to treat both treatment-naive and treatment-experienced patients. The enzyme acts as a molecular pair of scissors and glue, cutting the host DNA and stitching the viral DNA into the cut, creating a stable provirus that can remain dormant or become active immediately.
After the viral reverse transcriptase converts the single-stranded viral RNA into double-stranded DNA, the virus requires a way to permanently embed this genetic material into the host cell's DNA. By preventing this integration step, the virus is effectively neutralized, unable to replicate and establish a productive infection within the host's cellular machinery.
Mechanism of Action: How Integrase Inhibitors Block Viral DNA Integration
However, the biological drive of viruses necessitates an understanding of resistance mechanisms. Specific Targeting of the Catalytic Site Most integrase inhibitors are classified as "integrase strand transfer inhibitors" (INSTIs).
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