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・ Discovery and development of non-nucleoside reverse-transcriptase inhibitors
Discovery and development of nucleoside and nucleotide reverse-transcriptase inhibitors
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Discovery and development of nucleoside and nucleotide reverse-transcriptase inhibitors : ウィキペディア英語版
Discovery and development of nucleoside and nucleotide reverse-transcriptase inhibitors
Discovery and development of nucleoside and nucleotide reverse-transcriptase inhibitors (NRTIs and NtRTIs) began in the 1980s when the AIDS epidemic hit Western societies. NRTIs inhibit the reverse transcriptase (RT), an enzyme that controls the replication of the genetic material of the human immunodeficiency virus (HIV). The first NRTI was zidovudine, approved by the U.S. Food and Drug Administration (FDA) in 1987, which was the first step towards treatment of HIV. Six NRTI agents and one NtRTI have followed. The NRTIs and the NtRTI are analogues of endogenous 2´-deoxy-nucleoside and nucleotide. Drug-resistant viruses are an inevitable consequence of prolonged exposure of HIV-1 to anti-HIV drugs.
== History ==
In the summer of 1981 the acquired immunodeficiency syndrome (AIDS) was first reported. Two years later the etiological link to AIDS, the human immunodeficiency virus (HIV) was identified. Since the identification of HIV the development of effective antiretroviral drugs and the scientific achievements in HIV research has been enormous.〔 Antiretroviral drugs for the treatment of HIV infections belong to six categories: Nucleoside and nucleotide reverse-transcriptase inhibitors, Non-nucleoside reverse-transcriptase inhibitors, protease inhibitors, entry inhibitors, co-receptor inhibitors and integrase inhibitors.〔 The reverse transcriptase of HIV-1 has been the main foundation for the development of anti-HIV drugs. The first nucleoside reverse-transcriptase inhibitor with in vitro anti-HIV activity was zidovudine. Since zidovudine was approved in 1987, six nucleosides and one nucleotide reverse-transcriptase inhibitor (NRTI) have been approved by FDA.〔 NRTIs approved by the FDA are zidovudine, didanosine, zalcitabine, stavudine, lamivudine, abacavir and emtricitabine and the only nucleotide reverse-transcriptase inhibitor (NtRTI) approved is tenofovir (see table 4).〔〔

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