scholarly journals Mechanism of Inhibition of HIV-1 Reverse Transcriptase by 4′-Ethynyl-2-fluoro-2′-deoxyadenosine Triphosphate, a Translocation-defective Reverse Transcriptase Inhibitor

2009 ◽  
Vol 284 (51) ◽  
pp. 35681-35691 ◽  
Author(s):  
Eleftherios Michailidis ◽  
Bruno Marchand ◽  
Eiichi N. Kodama ◽  
Kamlendra Singh ◽  
Masao Matsuoka ◽  
...  
Keyword(s):  
Reverse Transcriptase ◽  
Transcriptase Inhibitor ◽  
Mechanism Of Inhibition ◽  
Deoxyadenosine Triphosphate ◽  
Reverse Transcriptase Inhibitor ◽  
Hiv 1

scholarly journals Impact of long-term antiretroviral therapy on gut and oral microbiotas in HIV-1-infected patients

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mayumi Imahashi ◽  
Hirotaka Ode ◽  
Ayumi Kobayashi ◽  
Michiko Nemoto ◽  
Masakazu Matsuda ◽  
...  
Keyword(s):  
Antiretroviral Therapy ◽  
Reverse Transcriptase ◽  
Transcriptase Inhibitor ◽  
Strand Transfer ◽  
Intestinal Dysbiosis ◽  
Α Diversity ◽  
Reverse Transcriptase Inhibitor ◽  
Hiv 1 ◽  
Over Time

AbstractIn HIV-1-infected patients, antiretroviral therapy (ART) is a key factor that may impact commensal microbiota and cause the emergence of side effects. However, it is not fully understood how long-term ART regimens have diverse impacts on the microbial compositions over time. Here, we performed 16S ribosomal RNA gene sequencing of the fecal and salivary microbiomes in patients under different long-term ART. We found that ART, especially conventional nucleotide/nucleoside reverse transcriptase inhibitor (NRTI)-based ART, has remarkable impacts on fecal microbial diversity: decreased α-diversity and increased ß-diversity over time. In contrast, dynamic diversity changes in the salivary microbiome were not observed. Comparative analysis of bacterial genus compositions showed a propensity for Prevotella-enriched and Bacteroides-poor gut microbiotas in patients with ART over time. In addition, we observed a gradual reduction in Bacteroides but drastic increases in Succinivibrio and/or Megasphaera under conventional ART. These results suggest that ART, especially NRTI-based ART, has more suppressive impacts on microbiota composition and diversity in the gut than in the mouth, which potentially causes intestinal dysbiosis in patients. Therefore, NRTI-sparing ART, especially integrase strand transfer inhibitor (INSTI)- and/or non-nucleotide reverse transcriptase inhibitor (NNRTI)-containing regimens, might alleviate the burden of intestinal dysbiosis in HIV-1-infected patients under long-term ART.

Conformational Study of the HIV-1 Reverse Transcriptase Inhibitor 1-[(2-Hydroxyethoxy)methyl]-6-(phenylthio)thymine (HEPT)

1999 ◽  
Vol 380 (2) ◽  
Author(s):  
L. Lawtrakul ◽  
S. Hannongbua ◽  
A. Beyer ◽  
P. Wolschann
Keyword(s):  
Reverse Transcriptase ◽  
Transcriptase Inhibitor ◽  
Conformational Study ◽  
Reverse Transcriptase Inhibitor ◽  
Hiv 1

AbstractThe conformations of the HIV-1 reverse transcriptase inhibitor 1-[(2-hydroxyethoxy)methyl]-6-(phenylthio)-thymine (HEPT) are calculated by semiempirical and mainly by

Practical Asymmetric Synthesis of Efavirenz (DMP 266), an HIV-1 Reverse Transcriptase Inhibitor

1998 ◽  
Vol 63 (23) ◽  
pp. 8536-8543 ◽  
Author(s):  
Michael E. Pierce ◽  
Rodney L. Parsons ◽  
Lilian A. Radesca ◽  
Young S. Lo ◽  
Stuart Silverman ◽  
...  
Keyword(s):  
Reverse Transcriptase ◽  
Asymmetric Synthesis ◽  
Transcriptase Inhibitor ◽  
Reverse Transcriptase Inhibitor ◽  
Hiv 1

scholarly journals HIV-1 Phenotypic Reverse Transcriptase Inhibitor Drug Resistance Test Interpretation Is Not Dependent on the Subtype of the Virus Backbone

PLoS ONE ◽  
2012 ◽  
Vol 7 (4) ◽  
pp. e34708 ◽  
Author(s):  
Michelle Bronze ◽  
Kim Steegen ◽  
Carole L. Wallis ◽  
Hans De Wolf ◽  
Maria A. Papathanasopoulos ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Reverse Transcriptase ◽  
Transcriptase Inhibitor ◽  
Resistance Test ◽  
Test Interpretation ◽  
Inhibitor Drug ◽  
Reverse Transcriptase Inhibitor ◽  
Hiv 1

Diversity of HIV-1 subtypes and transmitted drug-resistance mutations among minority HIV-1 variants in a Turkish cohort

2021 ◽  
Vol 19 ◽  
Author(s):  
Rabia Can Sarinoglu ◽  
Uluhan Sili ◽  
Ufuk Hasdemir ◽  
Burak Aksu ◽  
Guner Soyletir ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Reverse Transcriptase ◽  
Transcriptase Inhibitor ◽  
Transmitted Drug Resistance ◽  
Resistance Mutations ◽  
Drug Resistance Mutations ◽  
Subtype B ◽  
Treatment Naïve ◽  
Reverse Transcriptase Inhibitor ◽  
Hiv 1

Background: The World Health Organization (WHO) recommends the surveillance of transmitted drug resistance mutations (TDRMs) to ensure the effectiveness and sustainability of HIV treatment programs. Objective: Our aim was to determine the TDRMs and evaluate the distribution of HIV-1 subtypes using and compared next-generation sequencing (NGS) and Sanger-based sequencing (SBS) in a cohort of 44 antiretroviral treatment-naïve patients. Methods: All samples that were referred to the microbiology laboratory for HIV drug resistance analysis between December 2016 and February 2018 were included in the study. After exclusions, 44 treatment-naive adult patients with a viral load of >1000 copies/mL were analyzed. DNA sequencing for reverse transcriptase and protease regions was performed using both DeepChek ABL single round kit and Sanger-based ViroSeq HIV-1 Genotyping System. The mutations and HIV-1 subtypes were analyzed using the Stanford HIVdb version 8.6.1 Genotypic Resistance software, and TDRMs were assessed using the WHO surveillance drug-resistance mutation database. HIV-1 subtypes were confirmed by constructing a maximum-likelihood phylogenetic tree using Los Alamos IQ-Tree software. Results: NGS identified nucleos(t)ide reverse transcriptase inhibitor (NRTI)-TDRMs in 9.1% of the patients, non-nucleos(t)ide reverse transcriptase inhibitor (NNRTI)-TDRMs in 6.8% of the patients, and protease inhibitor (PI)-TDRMs in 18.2% of the patients at a detection threshold of ≥1%. Using SBS, 2.3% and 6.8% of the patients were found to have NRTI- and NNRTI-TDRMs, respectively, but no major PI mutations were detected. M41L, L74I, K65R, M184V, and M184I related to NRTI, K103N to NNRTI, and N83D, M46I, I84V, V82A, L24I, L90M, I54V to the PI sites were identified using NGS. Most mutations were found in low-abundance (frequency range: 1.0% - 4.7%) HIV-1 variants, except M41L and K103N. The subtypes of the isolates were found as follows; 61.4% subtype B, 18.2% subtype B/CRF02_AG recombinant, 13.6% subtype A, 4.5% CRF43_02G, and 2.3% CRF02_AG. All TDRMs, except K65R, were detected in HIV-1 subtype B isolates.. Conclusion: The high diversity of protease site TDRMs in the minority HIV-1 variants and prevalence of CRFs were remarkable in this study. All minority HIV-1 variants were missed by conventional sequencing. TDRM prevalence among minority variants appears to be decreasing over time at our center.

Immunologic effects of combined protease inhibitor and reverse transcriptase inhibitor therapy in previously treated chronic HIV-1 infection

AIDS ◽  
1998 ◽  
Vol 12 (14) ◽  
pp. 1833-1844 ◽  
Author(s):  
Janis V. Giorgi ◽  
Martin A. Majchrowicz ◽  
Timothy D. Johnson ◽  
Patricia Hultin ◽  
Jose Matud ◽  
...  
Keyword(s):  
Protease Inhibitor ◽  
Reverse Transcriptase ◽  
Transcriptase Inhibitor ◽  
Inhibitor Therapy ◽  
Previously Treated ◽  
Reverse Transcriptase Inhibitor ◽  
Hiv 1
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