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A reverse transcriptase (RT) is an enzyme used to convert RNA genome to DNA, a process termed reverse transcription.Reverse transcriptases are used by viruses such as HIV, COVID-19, and hepatitis B to replicate their genomes, by retrotransposon mobile genetic elements to proliferate within the host genome, and by eukaryotic cells to extend the telomeres at the ends of their linear chromosomes.
HIV-1 RT does not have proof-reading activity. This, combined with selective pressure from the drug, leads to mutations in reverse transcriptase that make the virus less susceptible to NRTIs and NNRTIs. Aspartate residues 110, 185, and 186 in the reverse transcriptase polymerase domain are important in the binding and incorporation of nucleotides.
HIV is an RNA virus, so it can not be integrated into the DNA in the nucleus of the human cell unless it is first "reverse" transcribed into DNA. Since the conversion of RNA to DNA is not naturally done in the mammalian cell, it is performed by a viral protein, reverse transcriptase, which makes it a selective target for inhibition. NRTIs are ...
Reverse-transcriptase inhibitor: Clinical data ... is indicated for the treatment of human immunodeficiency ... above 12 years of age weighing at least 40 ...
An improved knowledge of the action of reverse transcriptase has led to better nucleoside analogues to treat HIV infections. One of these drugs, lamivudine, has been approved to treat hepatitis B, which uses reverse transcriptase as part of its replication process. Researchers have gone further and developed inhibitors that do not look like ...
Reverse transcriptase is an enzyme that retroviruses, including HIV, utilize to replicate themselves. Secondary testing was performed in mouse cells infected with the retroviruses Friend virus or Harvey sarcoma virus, as the Wellcome group did not have a viable in-house HIV antiviral assay in place at that time, and these other retroviruses ...
It is safe for people over three months of age and can be used during pregnancy. [1] The medication can be taken with or without food. [1] Lamivudine is a nucleoside reverse transcriptase inhibitor and works by blocking the HIV reverse transcriptase and hepatitis B virus polymerase. [1]
[40] In 2019, Gilead Sciences challenged the validity of patents granted to the United States after 2015 for using the drug combination for HIV PrEP and post-exposure prophylaxis (PEP). [ 41 ] [ 42 ] [ 43 ] In July 2024, The Biden administration appealed the jury finding that ruled in favor of Gilead Sciences verdict that the U.S. government's ...