non-nucleoside reverse transcriptase inhibitor
Definition
Noun A class of antiretroviral medication used in the treatment of HIV infection. It works by binding directly to and inhibiting the enzyme reverse transcriptase, which is essential for the virus to convert its RNA into DNA, a critical step in its replication cycle. This type of drug is typically used in combination with other antiretroviral agents.
Usage
A non-nucleoside reverse transcriptase inhibitor is prescribed as part of a combination therapy regimen for HIV-1. It is not active against HIV-2. * The doctor added a non-nucleoside reverse transcriptase inhibitor to her existing drug cocktail. * Treatment guidelines recommend several non-nucleoside reverse transcriptase inhibitors as first-line options.
Advanced Usage
- Acronym: The term is commonly abbreviated as NNRTI (pronounced "N-N-R-T-I" or "non-nuke").
- Efavirenz is a well-known NNRTI.
- Mechanism of Action: It is described as a non-competitive or allosteric inhibitor, meaning it binds to a site on the enzyme different from the active site, changing the enzyme's shape and disabling it.
Variants and Related Words
- NNRTI: The standard acronym.
- Reverse Transcriptase Inhibitor (RTI): The broader drug class, which includes both nucleoside/nucleotide analogues (NRTIs) and non-nucleoside inhibitors (NNRTIs).
- Allosteric Inhibitor: A technical term describing its binding mechanism.
Synonyms
- NNRTI (the direct acronymic synonym).
- Non-nucleoside inhibitor (a common shortened form in medical contexts).
Related Terms and Phrases
- Combination Antiretroviral Therapy (cART) / Highly Active Antiretroviral Therapy (HAART): The treatment strategies where an NNRTI is used alongside other drugs.
- Drug resistance: A significant concern with NNRTIs; viral mutations can reduce their effectiveness.
- First-line regimen: A standard initial treatment protocol which often includes an NNRTI.
Noun
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an antiviral drug used against HIV; binds directly to reverse transcriptase and prevents RNA conversion to DNA; often used in combination with other drugs
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