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Nucleoside analog reverse-transcriptase inhibitors (NARTIs or NRTIs) compose the first class of antiretroviral drugs developed. In order to be incorporated into the viral DNA, NRTIs must be activated in the cell by the addition of three phosphate groups to their deoxyribose moiety, to form NRTI triphosphates.
The first nucleoside reverse-transcriptase inhibitor with in vitro anti-HIV activity was zidovudine. [6] Since zidovudine was approved in 1987, six nucleosides and one nucleotide reverse-transcriptase inhibitor (NRTI) have been approved by FDA. [6]
There is a large family of nucleoside analogue reverse transcriptase inhibitors, because DNA production by reverse transcriptase is very different from normal human DNA replication, so it is possible to design nucleoside analogues that are preferentially incorporated by the former. Some nucleoside analogues, however, can function both as NRTIs ...
ZDV is of the nucleoside analog reverse-transcriptase inhibitor (NRTI) class. [6] It works by inhibiting the enzyme reverse transcriptase that HIV uses to make DNA and therefore decreases replication of the virus. [6] Zidovudine was first described in 1964. [7] It was resynthesized from a public-domain formula by Burroughs Wellcome. [8]
Nucleoside reverse-transcriptase inhibitors (NRTI) and nucleotide reverse-transcriptase inhibitors (NtRTI) are nucleoside and nucleotide analogues which inhibit reverse transcription. 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.
Reverse transcriptase (RT) is an enzyme that controls the replication of the genetic material of HIV and other retroviruses. [1] The enzyme has two enzymatic functions. Firstly it acts as a polymerase where it transcribes the single-stranded RNA genome into single-stranded DNA and subsequently builds a complementary strand o
Lamivudine is a nucleoside reverse transcriptase inhibitor and works by blocking the HIV reverse transcriptase and hepatitis B virus polymerase. [1] Lamivudine was patented in 1995 and approved for use in the United States in 1995. [8] [9] It is on the World Health Organization's List of Essential Medicines. [10] It is available as a generic ...
Zalcitabine (2′-3′-dideoxycytidine, ddC), also called dideoxycytidine, is a nucleoside analog reverse-transcriptase inhibitor (NRTI) sold under the trade name Hivid. Zalcitabine was the third antiretroviral to be approved by the Food and Drug Administration (FDA) for the treatment of HIV/AIDS. It is used as part of a combination regimen.