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Arısoy M, Saydam M, Dolaksız YE, Demirbaş Ö, Talay Ç, Sağlam O, Demiray G, Kurtoğlu ED, Oktay AN. Evaluation of Pharmacokinetics of a BCS Class III Drug with Two Different Study Designs: Tenofovir Alafenamide Monofumarate Film-coated Tablet. AAPS PharmSciTech 2024; 25:123. [PMID: 38816624 DOI: 10.1208/s12249-024-02835-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 05/08/2024] [Indexed: 06/01/2024] Open
Abstract
Tenofovir alafenamide (TAF) is a BCS Class III compound and an oral pro-drug of Tenofovir (TFV) with limited oral bioavailability. The bioavailability of the oral intake increases with food as a result of the low stability of the active substance in the stomach. The reference drug is "Vemlidy® 25 mg Film Tablet", which contains 25 mg of TAF in "hemifumarate" form, is under patent protection until 15.08.2032 by Gilead, and so the "monofumarate" form was used in the present study. At first, a pilot study was conducted involving 12 subjects under fed conditions. The results of the pilot study revealed the test and reference products were not bioequivalent, as a result of insufficient statistical power and high inter-subject variability. Secondly, a physiologically based pharmacokinetic (PBPK) simulation was performed based on the pilot study results and literature data. Finally, the power of the design was increased and the pivotal study design was optimized into a four-period, full-replicated, cross-over study with 34 subjects under fed conditions and it was concluded that the test and reference products were bioequivalent. In conclusion, the present study proved the importance of a correct study design with higher statistical power for a BCS Class III compound with high variability, to present the pharmacokinetics.
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Affiliation(s)
- Mustafa Arısoy
- Drogsan Pharmaceuticals, 1370 St. No:7, Oğuzlar District, Balgat, Ankara, 06520, Türkiye
| | - Mehtap Saydam
- Drogsan Pharmaceuticals, 1370 St. No:7, Oğuzlar District, Balgat, Ankara, 06520, Türkiye.
| | - Yasemin Ekin Dolaksız
- Drogsan Pharmaceuticals, 1370 St. No:7, Oğuzlar District, Balgat, Ankara, 06520, Türkiye
| | - Özge Demirbaş
- Drogsan Pharmaceuticals, 1370 St. No:7, Oğuzlar District, Balgat, Ankara, 06520, Türkiye
| | - Çağrı Talay
- Drogsan Pharmaceuticals, 1370 St. No:7, Oğuzlar District, Balgat, Ankara, 06520, Türkiye
| | - Onursal Sağlam
- Novagenix Bioanalytical Drug R&D Centre, Balıkhisar, Özal Av. No:664, Akyurt, Ankara, 06970, Türkiye
| | - Gökçe Demiray
- Novagenix Bioanalytical Drug R&D Centre, Balıkhisar, Özal Av. No:664, Akyurt, Ankara, 06970, Türkiye
| | - Emel Doğan Kurtoğlu
- Novagenix Bioanalytical Drug R&D Centre, Balıkhisar, Özal Av. No:664, Akyurt, Ankara, 06970, Türkiye
| | - Ayşe Nur Oktay
- University of Heath Science, Faculty of Pharmacy, EmrahEtlik, Keçiören, Ankara, 06018, Türkiye
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De Clercq E. A scientific career from the early 1960s till 2023: A tale of the various protagonists. Biochem Pharmacol 2024:116248. [PMID: 38701868 DOI: 10.1016/j.bcp.2024.116248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/18/2024] [Accepted: 04/29/2024] [Indexed: 05/05/2024]
Abstract
In this era spanning more than 60 years (from the early 1960s till today (2023), a broad variety of actors played a decisive role: Piet De Somer, Tom C. Merigan, Paul A. Janssen, Maurice Hilleman, and Georges Smets. Two protagonists (Antonín Holý and John C. Martin) formed with me a unique triangle (the Holý Trinity). Walter Fiers' group (with the help of Jean Content) contributed to the cloning of human β-interferon, and Piet Herdewijn accomplished the chemical synthesis of an array of anti-HIV 2',3'-dideoxynucleoside analogues. Rudi Pauwels, Masanori Baba, Dominique Schols, Johan Neyts, Lieve Naesens, Anita Van Lierde, Graciela Andrei, Robert Snoeck and Dirk Daelemans, as members of my team, helped me in achieving the intended goal, the development of a selective therapy for virus infections. The collaboration with "Lowie" (Guangdi Li) generated a new dimension for the future.
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Affiliation(s)
- Erik De Clercq
- KU Leuven, Rega Institute for Medical Research, Herestraat 49, B-3000 Leuven, Belgium.
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Ugwu EO, Eleje GU, Ugwu AO, Nwagha UI, Ikechebelu JI, Umeh UA, Okafor HU. Antivirals for prevention of hepatitis B virus mother-to-child transmission in human immunodeficiency virus positive pregnant women co-infected with hepatitis B virus. Cochrane Database Syst Rev 2023; 6:CD013653. [PMID: 37306558 PMCID: PMC10259198 DOI: 10.1002/14651858.cd013653.pub2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
BACKGROUND Hepatitis B virus (HBV)-human Immunodeficiency virus (HIV) co-infection promotes an aggressive disease course of HBV infection. In the only available non-Cochrane systematic review on antiviral therapy during pregnancy for prevention of mother-to-child transmission of HBV, none of the women studied had HBV-HIV co-infection but were either HBV- or HIV-seropositive. Treatment of HBV alone may develop HIV-strains that are resistant to non-nucleoside reverse transcriptase inhibitors. Accordingly, co-treatment of the HIV infection is recommended. OBJECTIVES To evaluate the benefits and harms of tenofovir-based antiviral combination regimens versus placebo, tenofovir alone, or non-tenofovir-based antiviral regimen either alone or in combination with HBV for the prevention of mother-to-child transmission of HBV in HIV-positive pregnant women co-infected with HBV. SEARCH METHODS We searched the Cochrane Hepato-Biliary Group Controlled Trials Register, Cochrane Central Register of Controlled Trials, MEDLINE Ovid, Embase Ovid, LILACS (Bireme), Science Citation Index Expanded (Web of Science), and Conference Proceedings Citation Index-Science (Web of Science) on 30 January 2023. We manually searched the reference lists of included trials, searched on-line trial registries, and contacted experts in the field and pharmaceutical companies for any further potential trials. SELECTION CRITERIA We aimed to include randomised clinical trials comparing tenofovir-based antiviral combination regimens (anti-HIV regimen with lopinavir-ritonavir therapy, or any other antiviral therapy, and two drugs with activity against HBV, specifically, tenofovir alafenamide (TAF) or tenofovir disoproxil fumarate (TDF), plus lamivudine or emtricitabine) with placebo alone, or tenofovir alone, or non-tenofovir-based antiviral regimen (zidovudine, lamivudine, telbivudine, emtricitabine, entecavir, lopinavir-ritonavir, or any other antiviral therapy) either alone or in combination with at least two other antivirals. DATA COLLECTION AND ANALYSIS We used standard methodological procedures expected by Cochrane. Primary outcomes included all-cause infant mortality, proportion of infants with serious adverse events, proportion of infants with HBV mother-to-child transmission, all-cause maternal mortality, and proportion of mothers with serious adverse events. Secondary outcomes included proportion of infants with adverse events not considered serious, proportion of mothers with detectable HBV DNA (deoxyribonucleic acid) (before delivery), maternal hepatitis B e antigen (HBeAg) to HBe-antibody seroconversion (before delivery) and maternal adverse events not considered serious. We used RevMan Web to carry out analyses and presented results, where feasible, using a random-effects model and risk ratios (RR) with 95% confidence intervals (CIs). We performed sensitivity analysis. We assessed risk of bias using predefined domains, assessed the certainty of the evidence using GRADE, controlled risk of random errors with Trial Sequential Analysis, and presented outcome results in a summary of findings table. MAIN RESULTS Five completed trials were included, of which four trials contributed data to one or more of the outcomes. They included a total of 533 participants randomised to tenofovir-based antiviral combination regimens (196 participants) versus control (337 participants). The control groups received non-tenofovir-based antiviral regimens either as zidovudine alone (three trials) or as a combination of zidovudine, lamivudine and lopinavir-ritonavir (five trials). None of the trials used placebo or tenofovir alone. All trials were at unclear risk of bias. Four trials used intention-to-treat analyses. In the remaining trial, two participants in the intervention group and two in the control group were lost to follow-up. However, the outcomes of these four participants were not described. Tenofovir-based antiviral combination regimen versus control We are very uncertain about the effect of a tenofovir-based antiviral combination regimen versus control on all-cause infant mortality (RR 2.24, 95% CI 0.72 to 6.96; participants = 132; trials = 1; very low-certainty evidence); proportion of infants with serious adverse events (RR 1.76, 95% CI 1.27 to 2.43; participants = 132; trials = 1; very low-certainty evidence), and proportion of mothers with serious adverse events (RR 0.90, 95% CI 0.62 to 1.32; participants = 262; trials = 2; very low-certainty evidence). No trial reported data on the proportion of infants with HBV mother-to-child transmission and all-cause maternal mortality. We are also very uncertain about the effect of tenofovir-based antiviral combination regimens versus control on the proportion of infants with adverse events not considered serious (RR 0.94, 95% CI 0.06 to 13.68; participants = 31; trials = 1; very low-certainty evidence), and proportion of mothers with detectable HBV DNA (before delivery) (RR 0.66, 95% CI 0.42 to 1.02; participants = 169; trials = 2; very low-certainty evidence). No trial reported data on maternal hepatitis B e antigen (HBeAg) to HBe-antibody seroconversion (before delivery) and maternal adverse events not considered serious. All trials received support from industry. AUTHORS' CONCLUSIONS We do not know what the effects of tenofovir-based antiviral combination regimens are on all-cause infant mortality, proportion of infants with serious adverse events and proportion of mothers with serious adverse events, proportion of infants with adverse events not considered serious, and proportion of mothers with detectable HBV DNA before delivery because the certainty of evidence was very low. Only one or two trials, with insufficient power, contributed data for analyses. We lack randomised clinical trials at low risk of systematic and random errors, and fully reporting all-cause infant mortality, serious adverse events and reporting on clinical and laboratory outcomes, such as infants with HBV mother-to-child transmission, all-cause maternal mortality, maternal hepatitis B e antigen (HBeAg) to HBe-antibody seroconversion before delivery and maternal adverse events not considered serious.
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Affiliation(s)
- Emmanuel O Ugwu
- Department of Obstetrics and Gynaecology, Faculty of Medical Sciences, College of Medicine, University of Nigeria Nsukka/University of Nigeria Teaching Hospital Ituku-Ozalla, Enugu State, Enugu, Nigeria
| | - George U Eleje
- Effective Care Research Unit, Department of Obstetrics and Gynaecology, Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Nnewi Campus, PMB 5001, Nnewi, Nigeria
| | - Angela O Ugwu
- Department of Haematology and Immunolology, College of Medicine, University of Nigeria Nsukka/University of Nigeria Teaching Hospital Ituku Ozalla, Enugu State, Enugu, Nigeria
| | - Uchenna I Nwagha
- Department of Haematology and Immunology, Faculty of Medical Sciences, College of Medicine, University of Nigeria Nsukka/University of Nigeria Teaching Hospital Ituku-Ozalla, Enugu State, Enugu, Nigeria
| | - Joseph I Ikechebelu
- Department of Obstetrics and Gynaecology, Nnamdi Azikiwe University Teaching Hospital, Nnewi, Nigeria
| | - Uchenna A Umeh
- Department of Obstetrics and Gynaecology, Faculty of Medical Science, College of Medicine, University of Nigeria Enugu Campus/University of Nigeria Teaching Hospital Ituku-Ozalla, Enugu State, Enugu, Nigeria
| | - Henrietta U Okafor
- Department of Paediatrics, Faculty of Medical Sciences, College of Medicine, University of Nigeria Enugu Campus/University of Nigeria Teaching Hospital Ituku-Ozalla, Enugu State, Enugu, Nigeria
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Han G, Zhou G, Sun T, Luo X, Xu J, Chen C, Xu W, Jiang S, Wang C. Tenofovir alafenamide in blocking mother-to-child transmission of hepatitis B virus: a multi-center, prospective study. J Matern Fetal Neonatal Med 2022; 35:10551-10558. [PMID: 36253882 DOI: 10.1080/14767058.2022.2134771] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Data of tenofovir alafenamide (TAF) in preventing mother-to-child transmission (MTCT) of hepatitis B virus (HBV) are limited. This study aimed to evaluate the effectiveness and safety of TAF for preventing MTCT. METHODS Pregnant women with chronic HBV infection, positive for HBeAg and high-level HBV DNA, received oral TAF from gestational weeks 24-28 until postpartum week 4. All infants received HBV immunoprophylaxis. All mothers and infants were followed up until postpartum seven month. The primary outcome was the rate of MTCT at seven month. RESULTS Eighty-nine mothers delivered and 91 infants were born. All were followed up to postpartum seven month. TAF was initiated at a mean gestational age of 25.0 (±1.0) weeks with the mean treatment duration of 14.3 (±1.2) weeks before delivery; 92.1% (82/89) mothers discontinued TAF, the median [IQR] time was 5.9 [4.7] weeks postpartum. The HBsAg positive rate was 0% at seven months in 91 infants, no growth retardation and congenital defects. All mothers were tolerated during TAF treatment. At delivery, 82.02% (73/89) mothers achieved HBV DNA < 200,000 IU/ml, 21.35% (19/89) achieved HBV DNA < 500 IU/ml. No significant changes on the mean (±SD) serum phosphate between baseline (1.20 ± 0.10 mmol/L) and at delivery (1.21 ± 0.13 mmol/L, p > .05). Serum creatinine at delivery (52.23 ± 8.50 µmol/L) was higher than baseline (45.97 ± 5.60 µmol/L, p < .05), but within normal range. Nine of 82 mothers stopped TAF treatment after delivery had mild ALT elevation. CONCLUSION TAF therapy initiated during the second trimester was effective in preventing MTCT with no safety concerns for mothers and infants (ClinicalTrials.gov number, NCT04065230).
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Affiliation(s)
- Guorong Han
- Department of Obstetrics and Gynecology, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, China
| | - Guanlun Zhou
- Department of Obstetrics and Gynecology, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, China
| | - Tong Sun
- Department of Hepatology, The Fifth People's Hospital of Wuxi, Wuxi, China
| | - Xiucui Luo
- Department of Obstetrics and Gynecology, The Maternal and Child Health Hospital of Lianyungang, Lianyungang, China
| | - Jinxia Xu
- Department of Obstetrics and Gynecology, The Maternal and Child Health Hospital of Huai'an, Huai'an, China
| | - Chao Chen
- Department of Obstetrics and Gynecology, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wen Xu
- Department of Obstetrics and Gynecology, The Maternal and Child Health Hospital of Lianyungang, Lianyungang, China
| | - Su'e Jiang
- Department of Obstetrics and Gynecology, The Maternal and Child Health Hospital of Huai'an, Huai'an, China
| | - Chenxu Wang
- Department of Obstetrics and Gynecology, The Second Hospital of Nanjing, Medical School of Nanjing University, Nanjing, China
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Clercq ED. Reflections on the Rega Institute for Medical Research, at the fiftieth anniversary of the Rega Stichting vzw (Rega Instituut vzw, Rega Foundation). Antivir Chem Chemother 2022; 30:20402066221129979. [PMID: 36305032 PMCID: PMC9618749 DOI: 10.1177/20402066221129979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The idea to start the Rega Foundation was conceived in 1971 at an informal meeting organized by Prof. Piet De Somer (where Prof. Alfons Billiau, Prof. André Vlerick and I were also present), before the Foundation was formally created in 1972. From the early years some antiviral compounds, such as BVDU and the aminoacyl esters of acyclovir (from which ultimately valacyclovir evolved) originated. The advent of AIDS in 1981 and the discovery of the etiologic agent (HIV) thereof in 1983 have led to the identification of an avalanche of anti-HIV compounds in which the Rega Institute has played a primordial role. Foremost among these compounds was tenofovir, discovered in collaboration with Antonín Holý from the IOCB (Institute of Organic Chemistry and Biochemistry) in Prague. Tenofovir laid the basis for the treatment of HIV (AIDS) and hepatitis B virus (HBV) infections, and in combination with emtricitabine it was the first chemical ever approved by the US FDA (Food and Drug Administration) for the prophylaxis of HIV infections.
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Affiliation(s)
- Erik De Clercq
- Department of Microbiology, Immunology & Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Leuven, Belgium,Erik De Clercq, Department of Microbiology, Immunology & Transplantation, Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Leuven, Belgium.
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De Clercq E. FV-100 for the Treatment of Varicella-Virus (VZV) Infections: Quo Vadis? Viruses 2022; 14:v14040770. [PMID: 35458500 PMCID: PMC9028626 DOI: 10.3390/v14040770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/04/2022] [Accepted: 04/05/2022] [Indexed: 01/15/2023] Open
Abstract
The bicyclic nucleoside analogue (BCNA) Cf1743 and its orally bioavailable prodrug FV-100 have unique potential as varicella-zoster virus (VZV) inhibitors to treat herpes zoster (shingles) and the therewith associated pain, including post-herpetic neuralgia (PHN). The anti-VZV activity of Cf1743 depends on a specific phosphorylation by the VZV-encoded thymidine kinase (TK). The target of antiviral action is assumed to be the viral DNA polymerase (or DNA synthesis in the virus-infected cells).
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Affiliation(s)
- Erik De Clercq
- Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, 3000 Leuven, Belgium
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Li G, Wang Y, De Clercq E. Approved HIV reverse transcriptase inhibitors in the past decade. Acta Pharm Sin B 2022; 12:1567-1590. [PMID: 35847492 PMCID: PMC9279714 DOI: 10.1016/j.apsb.2021.11.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/13/2021] [Accepted: 11/08/2021] [Indexed: 01/09/2023] Open
Abstract
HIV reverse transcriptase (RT) inhibitors are the important components of highly active antiretroviral therapies (HAARTs) for anti-HIV treatment and pre-exposure prophylaxis in clinical practice. Many RT inhibitors and their combination regimens have been approved in the past ten years, but a review on their drug discovery, pharmacology, and clinical efficacy is lacking. Here, we provide a comprehensive review of RT inhibitors (tenofovir alafenamide, rilpivirine, doravirine, dapivirine, azvudine and elsulfavirine) approved in the past decade, regarding their drug discovery, pharmacology, and clinical efficacy in randomized controlled trials. Novel RT inhibitors such as islatravir, MK-8504, MK-8507, MK8583, IQP-0528, and MIV-150 will be also highlighted. Future development may focus on the new generation of novel antiretroviral inhibitors with higher bioavailability, longer elimination half-life, more favorable side-effect profiles, fewer drug-drug interactions, and higher activities against circulating drug-resistant strains.
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Key Words
- 3TC, (−)-2′,3′-dideoxy-3′-thiacytidine (common name, lamivudine)
- ABC, abacavir
- ATV, atazanavir
- AZT, 3′-azido-3′-deoxy-thymidine (common name, zidovudine)
- BIC, bictegravir
- CAB, cabotegravir
- CC50, the 50% cytotoxic concentration
- COBI, cobicistat
- Clinical efficacy
- DOR, doravirine
- DPV, dapivirine
- DRV, darunavir
- DTG, dolutegravir
- EACS, European AIDS Clinical Society
- EC50, half maximal effective concentration
- EFV, efavirenz
- ESV, elsulfavirine
- EVG, elvitegravir
- F, bioavailability
- FDA, US Food and Drug Administration
- FTC, (−)-2′,3′-dideoxy-5-fluoro-3′-thiacytidine (common name, emtricitabine)
- HAART
- HAART, highly active antiretroviral therapy
- HIV treatment
- HIV, human immunodeficiency virus
- IAS-USA, International Antiviral Society-USA
- IC50, half maximal inhibitory concentration
- MSM, men who have sex with men
- NNRTI
- NNRTI, non-nucleoside reverse transcriptase inhibitor
- NRTI
- NRTI, nucleoside/nucleotide reverse transcriptase inhibitor
- RPV, rilpivirine
- TAF, tenofovir alafenamide
- TDF, tenofovir disoproxil fumarate
- t1/2, elimination half-life
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Affiliation(s)
- Guangdi Li
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha 410078, China
| | - Yali Wang
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha 410078, China
| | - Erik De Clercq
- Rega Institute for Medical Research, Department of Microbiology, Immunology and Transplantation, KU Leuven, Leuven B-3000, Belgium
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Schinazi RF, Patel D, Ehteshami M. The best backbone for HIV prevention, treatment, and elimination: Emtricitabine+tenofovir. Antivir Ther 2022; 27:13596535211067599. [PMID: 35491570 DOI: 10.1177/13596535211067599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The advent of antiretroviral combination therapy has significantly impacted the HIV/AIDS epidemic. No longer a death sentence, HIV infection can be controlled and suppressed using cocktail therapies that contain two or more small molecule drugs. This review aims to highlight the discovery, development, and impact of one such molecule, namely, emtricitabine (FTC, emtriva), which is one of the most successful drugs in the fight against HIV/AIDS and has been taken by over 94% of individuals infected with HIV in the USA. We also pay tribute to Dr. John C. Martin, former CEO and Chairman of Gilead Sciences, who unexpectedly passed away in 2021. A true visionary, he was instrumental in delivering FTC, as part of combination therapy with TDF (tenofovir, viread) to the global stage. As the fight to eradicate HIV marches on, we honor Dr. Martin's legacy of collaboration, achievement, and hope.
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Affiliation(s)
- Raymond F Schinazi
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, 1371Emory University School of Medicine and Children Healthcare of Atlanta, Atlanta, GA, USA
| | - Dharmeshkumar Patel
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, 1371Emory University School of Medicine and Children Healthcare of Atlanta, Atlanta, GA, USA
| | - Maryam Ehteshami
- Center for AIDS Research, Laboratory of Biochemical Pharmacology, Department of Pediatrics, 1371Emory University School of Medicine and Children Healthcare of Atlanta, Atlanta, GA, USA
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Bi X, Liu F, Zhang X, Wang H, Ye Z, Yun K, Huang X, Ding H, Geng W, Xu J. Vitamin D and Calcium Supplementation Reverses Tenofovir-Caused Bone Mineral Density Loss in People Taking ART or PrEP: A Systematic Review and Meta-Analysis. Front Nutr 2022; 9:749948. [PMID: 35433788 PMCID: PMC9008884 DOI: 10.3389/fnut.2022.749948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 01/27/2022] [Indexed: 11/18/2022] Open
Abstract
Background The decrease of bone mineral density (BMD) after the intake of Tenofovir disoproxil fumarate (TDF)-based drugs in people living with HIV/AIDS (PLWHA) and HIV-negative key populations under pre-exposure prophylaxis (PrEP) regimen raised concerns. Previous findings on the effects of vitamin D (VD) and calcium supplements and the recovery of BMD loss were inconclusive. The optimal doses of VD and calcium and its supplementary duration remained unknown. Therefore, we conducted a systematic review and meta-analysis to synthesize current evidence on VD and calcium supplements to inform clinical practice. Methods We searched PubMed, Web of Science, Cochrane library, and EMBASE databases for all placebo-controlled trials and prospective cohort studies published before March 5, 2021 that investigated VD and calcium supplements in participants taking TDF-based drugs. The keywords calcium, vitamin D, Tenofovir, and BMD were used for the searches. The primary outcome was changes of spine and hip BMD. A subgroup analysis was performed to determine the factors that were related to the effects of VD supplements on BMD. Locally weighted regression (loess) was used to determine the relationships of VD supplements, supplementary duration, and changes of BMD. This study was registered at PROSPERO (No. 42021231000). Findings Seven eligible studies including 703 participants were included in the analyses. The meta-analysis found that VD and calcium supplementation was related to a significant increase of BMD in the spine and hip [standardized mean difference (SMD) 0.43; 95% CI, 0.25 to 0.61, p = 0.009]. Moreover, positive dose-response relationships were demonstrated between doses of VD and calcium supplements, supplementary duration, and BMD recovery. Patients who took VD with the dose level of 4,000 IU/D obtained the highest BMD improvement (SMD 0.59, 95% CI, 0.43 to 0.74). No side effects were reported on VD and calcium supplementation. Interpretation We found the VD and calcium supplementation was associated with increases of BMD in participants taking TDF-based drugs. An optimal supplementary dose of 4,000 IU/D for VD was suggested for clinicians. The findings could be used in clinical practice to improve the BMD outcomes in people who were taking TDF-based drugs.Systematic Review Registration: https://www.crd.york.ac.uk/PROSPERO/.
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Affiliation(s)
- Xiaoyan Bi
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
| | - Fan Liu
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
| | - Xiangjun Zhang
- School of Public Health, The University of Tennessee, Knoxville, Knoxville, TN, United States
| | - Hongyi Wang
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
| | - Zehao Ye
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
| | - Ke Yun
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
| | - Xiaojie Huang
- Department of Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, China
| | - Haibo Ding
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
| | - Wenqing Geng
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
| | - Junjie Xu
- National Health Commission (NHC) Key Laboratory of Acquired Immunodeficiency Syndrome (AIDS) Immunology, National Clinical Research Center for Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, China
- Key Laboratory of AIDS Immunology, Chinese Academy of Medical Sciences, Shenyang, China
- Key Laboratory of AIDS Immunology of Liaoning Province, Shenyang, China
- Clinical Research Academy, Peking University Shenzhen Hospital, Peking University, Shenzhen, China
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10
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Chang ML, Liaw YF. Hepatitis B Flare in Hepatitis B e Antigen-Negative Patients: A Complicated Cascade of Innate and Adaptive Immune Responses. Int J Mol Sci 2022; 23:ijms23031552. [PMID: 35163476 PMCID: PMC8836007 DOI: 10.3390/ijms23031552] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/19/2022] [Accepted: 01/26/2022] [Indexed: 12/11/2022] Open
Abstract
Chronic hepatitis B virus (HBV) infection is a dynamic process involving interactions among HBV, hepatocytes, and the host immune system. The natural course of chronic hepatitis B (CHB) is divided into four chronological phases, including the hepatitis B e antigen (HBeAg)-positive and HBeAg-negative phases. During HBV flare, alanine aminotransferase (ALT) levels abruptly rise to >5× the upper limit of normal; this is thought to occur due to the immune response against an upsurge in serum HBV DNA and antigen levels. Hepatitis flares may occur spontaneously, during or after antiviral therapy, or upon immunosuppression or chemotherapy in both HBeAg-positive and HBeAg-negative patients. The clinical spectrum of HBV flares varies from asymptomatic to hepatic decompensation or failure. HBeAg seroconversion with ≥ 1 year of consolidation therapy is accepted as an endpoint of oral antiviral therapy in HBeAg-positive patients, but recommendations for treating HBeAg-negative patients differ. Thus, the management of HBeAg-negative patients has attracted increasing interest. In the current review, we summarize various types of HBV flares and the associated complex cascade of innate and adaptive immune responses, with a focus on HBeAg-negative CHB patients. Hopefully, this review will provide insight into immunopathogenesis to improve the management of HBV flares in HBeAg-negative CHB patients.
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Affiliation(s)
- Ming-Ling Chang
- College of Medicine, Chang Gung University, Taoyuan 333323, Taiwan;
- Division of Hepatology, Department of Hepatogastroenterology, Chang Gung Memorial Hospital, Taoyuan 333423, Taiwan
- Correspondence: ; Tel.: +886-3-3281200 (ext. 8107); Fax: +886-3-3272236
| | - Yun-Fan Liaw
- College of Medicine, Chang Gung University, Taoyuan 333323, Taiwan;
- Division of Hepatology, Department of Hepatogastroenterology, Chang Gung Memorial Hospital, Taoyuan 333423, Taiwan
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11
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Gengiah TN, Abdool Karim Q, Harkoo I, Mansoor L, Zuma NY, Radebe P, Samsunder N, Baxter C, Maharaj B, Baum MM, Moss JA, Pozzetto B, Hankins C, Abdool Karim S. CAPRISA 018: a phase I/II clinical trial study protocol to assess the safety, acceptability, tolerability and pharmacokinetics of a sustained-release tenofovir alafenamide subdermal implant for HIV prevention in women. BMJ Open 2022; 12:e052880. [PMID: 34992111 PMCID: PMC8739430 DOI: 10.1136/bmjopen-2021-052880] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION Young African women bear a disproportionately high risk for HIV acquisition. HIV technologies that empower women to protect themselves are needed. Safe, potent antiretroviral agents such as tenofovir alafenamide (TAF), formulated as long-acting subdermal implants, offer an innovative solution. METHODS AND ANALYSIS CAPRISA 018 is a phase I/II trial to evaluate the safety, acceptability, tolerability and pharmacokinetics (PKs) of a TAF free base subdermal silicone implant containing 110 mg of TAF with an anticipated 0.25 mg/day release rate.The phase I trial (n=60) will assess the safety of one implant inserted in six participants (Group 1), followed by dose escalation components (Groups 2 and 3) assessing the safety, tolerability and PK of one to four TAF 110 mg implants releasing between 0.25 mg and 1 mg daily in 54 healthy women at low risk for HIV infection. Data from this phase I trial will be used to determine the dosing, implant location and implant replacement interval for the phase II trial.The phase II component (Group 4) will assess extended safety, PK, tolerability and acceptability of the implant in 490 at risk women, randomised in a 1:1 ratio to the TAF implant and placebo tablet or to the placebo implant and an oral pre-exposure prophylaxis tablet. Safety will be assessed by calculating the percentage change in creatinine clearance from baseline at weeks 4, 12, 24, 36, 72, 96 and 120, compared with the percentage change in the control group. ETHICS AND DISSEMINATION The South African Health Products Regulatory Authority and the University of KwaZulu-Natal's Biomedical Research Ethics Committee have approved the trial. Results will be disseminated through open access peer reviewed publications, conference presentations, public stakeholder engagement and upload of data into the clinical trials registry. TRIAL REGISTRATION NUMBER PACTR201809520959443.
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Affiliation(s)
| | - Quarraisha Abdool Karim
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York, USA
| | - Ishana Harkoo
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
| | - Leila Mansoor
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
| | | | - Precious Radebe
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
| | - Natasha Samsunder
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
| | - Cheryl Baxter
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
| | - B Maharaj
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
| | - Marc M Baum
- Oak Crest Institute of Science, Monrovia, California, USA
| | - John A Moss
- Oak Crest Institute of Science, Monrovia, California, USA
| | - Bruno Pozzetto
- GIMAP(EA3064), Faculty of Medicine Jacques Lisfranc, University Jean Monnet, Saint-Etienne, France
| | - Catherine Hankins
- Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
| | - Salim Abdool Karim
- Centre for the Aids Programme of Research in South Africa, Durban, South Africa
- Department of Epidemiology, Columbia University Mailman School of Public Health, New York, New York, USA
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12
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Wang Z, Yang L. Broad-spectrum prodrugs with anti-SARS-CoV-2 activities: Strategies, benefits, and challenges. J Med Virol 2021; 94:1373-1390. [PMID: 34897729 DOI: 10.1002/jmv.27517] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 01/18/2023]
Abstract
In this era, broad-spectrum prodrugs with anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) activities are gaining considerable attention owing to their potential clinical benefits and role in combating the fast-spreading coronavirus disease 2019 (COVID-19) pandemic. The last 2 years have seen a surge of reports on various broad-spectrum prodrugs against SARS-CoV-2, and in in vitro studies, animal models, and clinical practice. Currently, only remdesivir (with many controversies and limitations) has been approved by the U.S. FDA for the treatment of SARS-CoV-2 infection, and additional potent anti-SARS-CoV-2 drugs are urgently required to enrich the defense arsenals. The world has ubiquitously grappled with the COVID-19 pandemic, and the availability of broad-spectrum prodrugs provides great hope for us to subdue this global threat. This article reviews promising treatment strategies, antiviral mechanisms, potential benefits, and daunting clinical challenges of anti-SARS-CoV-2 agents to provide some important guidance for future clinical treatment.
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Affiliation(s)
- Zhonglei Wang
- Key Laboratory of Green Natural Products and Pharmaceutical Intermediates in Colleges and Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong, P. R. China.,Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Tsinghua University, Beijing, P. R. China
| | - Liyan Yang
- Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong, P. R. China
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13
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Tribute to John C. Martin at the Twentieth Anniversary of the Breakthrough of Tenofovir in the Treatment of HIV Infections. Viruses 2021; 13:v13122410. [PMID: 34960679 PMCID: PMC8705530 DOI: 10.3390/v13122410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 01/05/2023] Open
Abstract
At Bristol-Myers (BM) (1985–1990), John C. Martin started his HIV career with directing the clinical development of didanosine (ddI) and stavudine (d4T). During this period, he became aware of the acyclic nucleoside phosphonates (ANPs), such as (S)-HPMPA and PMEA, as potential antiviral drugs. Under his impulse, BM got involved in the evaluation of these ANPs, but the merger of BM with Squibb (to become BMS) incited John to leave BM and join Gilead Sciences, and the portfolio of the ANPs followed the transition. At Gilead, John succeeded in obtaining the approval from the US FDA for the use of cidofovir in the treatment of cytomegalovirus (CMV) retinitis in AIDS patients, which was reminiscent of John’s first experience with ganciclovir (at Syntex) as an anti-CMV agent. At Gilead, John would then engineer the development of tenofovir, first as TDF (tenofovir disoproxil fumarate) and then as TAF (tenofovir alafenamide) and various combinations thereof, for the treatment of HIV infections (i), TDF and TAF for the treatment of hepatitis B (HBV) infections (ii), and TDF and TAF in combination with emtricitabine for the prophylaxis of HIV infections (iii).
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14
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Higuera-de-la-Tijera F, Castro-Narro GE, Velarde-Ruiz Velasco JA, Cerda-Reyes E, Moreno-Alcántar R, Aiza-Haddad I, Castillo-Barradas M, Cisneros-Garza LE, Dehesa-Violante M, Flores-Calderón J, González-Huezo MS, Márquez-Guillén E, Muñóz-Espinosa LE, Pérez-Hernández JL, Ramos-Gómez MV, Sierra-Madero J, Sánchez-Ávila JF, Torre-Delgadillo A, Torres R, Marín-López ER, Kershenobich D, Wolpert-Barraza E. Asociación Mexicana de Hepatología A.C. Clinical guideline on hepatitis B. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2021; 86:403-432. [PMID: 34483073 DOI: 10.1016/j.rgmxen.2021.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/14/2021] [Indexed: 12/24/2022]
Abstract
Hepatitis B virus (HBV) infection continues to be a worldwide public health problem. In Mexico, at least three million adults are estimated to have acquired hepatitis B (total hepatitis B core antibody [anti-HBc]-positive), and of those, 300,000 active carriers (hepatitis B surface antigen [HBsAg]-positive) could require treatment. Because HBV is preventable through vaccination, its universal application should be emphasized. HBV infection is a major risk factor for developing hepatocellular carcinoma. Semi-annual liver ultrasound and serum alpha-fetoprotein testing favor early detection of that cancer and should be carried out in all patients with chronic HBV infection, regardless of the presence of advanced fibrosis or cirrhosis. Currently, nucleoside/nucleotide analogues that have a high barrier to resistance are the first-line therapies.
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Affiliation(s)
- F Higuera-de-la-Tijera
- Departamento de Gastroenterología, Hospital General de México "Dr. Eduardo Liceaga", Mexico City, Mexico
| | - G E Castro-Narro
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico.
| | - J A Velarde-Ruiz Velasco
- Departamento de Gastroenterología, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Guadalajara, Jalisco, Mexico
| | - E Cerda-Reyes
- Departamento de Gastroenterología, Hospital Central Militar, Mexico City, Mexico
| | - R Moreno-Alcántar
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, IMSS, Mexico City, Mexico
| | - I Aiza-Haddad
- Clínica de Enfermedades Hepáticas, Hospital Ángeles Lomas, Mexico City, Mexico
| | - M Castillo-Barradas
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional "La Raza", IMSS, Mexico City, Mexico
| | - L E Cisneros-Garza
- Centro de Enfermedades Hepáticas, Hospital San José, Nuevo León, Monterrey, Mexico
| | - M Dehesa-Violante
- Fundación Mexicana para la Salud Hepática A.C. (FUNDHEPA), Mexico City, Mexico
| | - J Flores-Calderón
- Departamento de Gastroenterología, Hospital de Pediatría del Centro Médico Nacional Siglo XXI, IMSS, Mexico City, Mexico
| | - M S González-Huezo
- Servicio de Gastroenterología y Endoscopia Gastrointestinal, ISSSEMYM, Metepec, Estado de México, Mexico
| | - E Márquez-Guillén
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - L E Muñóz-Espinosa
- Clínica de Hígado, Departamento de Medicina Interna, Hospital Universitario "Dr. José E. González", Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, Mexico
| | - J L Pérez-Hernández
- Departamento de Gastroenterología, Hospital General de México "Dr. Eduardo Liceaga", Mexico City, Mexico
| | - M V Ramos-Gómez
- Departamento de Gastroenterología, Centro Médico Nacional "20 de Noviembre", ISSSTE, Mexico City, Mexico
| | - J Sierra-Madero
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - J F Sánchez-Ávila
- Tecnológico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Mexico City, Mexico
| | - A Torre-Delgadillo
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
| | - R Torres
- Hospital de Infectología del Centro Médico Nacional "La Raza", IMSS, Mexico City, Mexico
| | | | - D Kershenobich
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición "Salvador Zubirán", Mexico City, Mexico
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15
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Higuera-de-la-Tijera F, Castro-Narro GE, Velarde-Ruiz Velasco JA, Cerda-Reyes E, Moreno-Alcántar R, Aiza-Haddad I, Castillo-Barradas M, Cisneros-Garza LE, Dehesa-Violante M, Flores-Calderón J, González-Huezo MS, Márquez-Guillén E, Muñóz-Espinosa LE, Pérez-Hernández JL, Ramos-Gómez MV, Sierra-Madero J, Sánchez-Ávila JF, Torre-Delgadillo A, Torres R, Marín-López ER, Kershenobich D, Wolpert-Barraza E. Asociación Mexicana de Hepatología A.C. Clinical guideline on hepatitis B. REVISTA DE GASTROENTEROLOGIA DE MEXICO (ENGLISH) 2021; 86:S0375-0906(21)00061-6. [PMID: 34384668 DOI: 10.1016/j.rgmx.2021.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 04/11/2021] [Accepted: 04/14/2021] [Indexed: 02/07/2023]
Abstract
Hepatitis B virus (HBV) infection continues to be a worldwide public health problem. In Mexico, at least three million adults are estimated to have acquired hepatitis B (total hepatitis B core antibody [anti-HBc]-positive), and of those, 300,000 active carriers (hepatitis B surface antigen [HBsAg]-positive) could require treatment. Because HBV is preventable through vaccination, its universal application should be emphasized. HBV infection is a major risk factor for developing hepatocellular carcinoma. Semi-annual liver ultrasound and serum alpha-fetoprotein testing favor early detection of that cancer and should be carried out in all patients with chronic HBV infection, regardless of the presence of advanced fibrosis or cirrhosis. Currently, nucleoside/nucleotide analogues that have a high barrier to resistance are the first-line therapies.
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Affiliation(s)
- F Higuera-de-la-Tijera
- Departamento de Gastroenterología, Hospital General de México «Dr. Eduardo Liceaga», Ciudad de México, México
| | - G E Castro-Narro
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México.
| | - J A Velarde-Ruiz Velasco
- Departamento de Gastroenterología, Hospital Civil de Guadalajara «Fray Antonio Alcalde», Guadalajara, Jalisco, México
| | - E Cerda-Reyes
- Departamento de Gastroenterología, Hospital Central Militar, Ciudad de México, México
| | - R Moreno-Alcántar
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional Siglo XXI, IMSS, Ciudad de México, México
| | - I Aiza-Haddad
- Clínica de Enfermedades Hepáticas, Hospital Ángeles Lomas, Ciudad de México, México
| | - M Castillo-Barradas
- Departamento de Gastroenterología, Hospital de Especialidades del Centro Médico Nacional «La Raza», IMSS, Ciudad de México, México
| | - L E Cisneros-Garza
- Centro de Enfermedades Hepáticas, Hospital San José, Nuevo León, Monterrey, México
| | - M Dehesa-Violante
- Fundación Mexicana para la Salud Hepática A.C. (FUNDHEPA), Ciudad de México, México
| | - J Flores-Calderón
- Departamento de Gastroenterología, Hospital de Pediatría del Centro Médico Nacional Siglo XXI, IMSS, Ciudad de México, México
| | - M S González-Huezo
- Servicio de Gastroenterología y Endoscopia Gastrointestinal, ISSSEMYM, Metepec, Estado de México, México
| | - E Márquez-Guillén
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | - L E Muñóz-Espinosa
- Clínica de Hígado, Departamento de Medicina Interna, Hospital Universitario «Dr. José E. González», Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - J L Pérez-Hernández
- Departamento de Gastroenterología, Hospital General de México «Dr. Eduardo Liceaga», Ciudad de México, México
| | - M V Ramos-Gómez
- Departamento de Gastroenterología, Centro Médico Nacional «20 de Noviembre», ISSSTE, Ciudad de México, México
| | - J Sierra-Madero
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | - J F Sánchez-Ávila
- Tecnológico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Ciudad de México, México
| | - A Torre-Delgadillo
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
| | - R Torres
- Hospital de Infectología del Centro Médico Nacional «La Raza», IMSS, Ciudad de México, México
| | | | - D Kershenobich
- Departamento de Gastroenterología, Instituto Nacional de Ciencias Médicas y Nutrición «Salvador Zubirán», Ciudad de México, México
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16
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Scurt FG, Bose K, Canbay A, Mertens PR, Chatzikyrkou C. [Chronic kidney injury in patients with liver diseases - Reappraising pathophysiology and treatment options]. ZEITSCHRIFT FUR GASTROENTEROLOGIE 2021; 59:560-579. [PMID: 33728618 DOI: 10.1055/a-1402-1502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Acute and chronic kidney disease concurs commonly with liver disease and is associated with a wide array of complications including dialysis dependency and increased mortality. Patients with liver disease or liver cirrhosis show a higher prevalence of chronic kidney disease. This is attributed to concomitant comorbidities, such as metabolic syndrome, chronic inflammation, hypercoagulability, hyperfibrinolysis, diabetes mellitus and dyslipidaemias. But chronic progressive kidney disease is not always due to hepatorenal syndrome. Beyond that, other diseases or disease entities should be considered. Among them are diabetic nephropathy, secondary IgA nephropathy, hepatitis C -associated membranoproliferative Glomerulonephritis (MPGN) and hepatitis B-associated membranous nephropathy.Coexisting diseases, similar underlying pathophysiologic mechanisms, or simultaneously concurring pathophysiological processes and overlapping clinical manifestations, impede the etiologic diagnosis and corresponding treatment of chronic kidney disease in the setting of chronic liver disease. In this review, we focus on common and rare pathologies, which can lead to chronic kidney disease in this particular patient group and try to summarize the most recent therapeutic modalities.
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Affiliation(s)
- Florian Gunnar Scurt
- Klinik für Nieren- und Hochdruckerkrankungen, Diabetologie und Endokrinologie, Medizinische Fakultät der Otto-von-Guericke-Universität, Magdeburg, Deutschland.,Health Campus Immunology, Infectiology and Inflammation, Otto von Guericke University, Magdeburg, Germany
| | - Katrin Bose
- Health Campus Immunology, Infectiology and Inflammation, Otto von Guericke University, Magdeburg, Germany.,Universitätsklinik für Gastroenterologie, Hepatologie und Infektiologie, Medizinische Fakultät der Otto-von-Guericke-Universität, Magdeburg, Deutschland
| | - Ali Canbay
- Ruhr-Universität Bochum, Medizinische Klinik, Universitätsklinikum Knappschaftskrankenhaus Bochum GmbH, Bochum, Deutschland
| | - Peter R Mertens
- Klinik für Nieren- und Hochdruckerkrankungen, Diabetologie und Endokrinologie, Medizinische Fakultät der Otto-von-Guericke-Universität, Magdeburg, Deutschland.,Health Campus Immunology, Infectiology and Inflammation, Otto von Guericke University, Magdeburg, Germany
| | - Christos Chatzikyrkou
- Klinik für Nieren- und Hochdruckerkrankungen, Diabetologie und Endokrinologie, Medizinische Fakultät der Otto-von-Guericke-Universität, Magdeburg, Deutschland.,Health Campus Immunology, Infectiology and Inflammation, Otto von Guericke University, Magdeburg, Germany
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17
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Li G, Xu M, Yue T, Gu W, Tan L. Life-long passion for antiviral research and drug development: 80th birthday of Prof. Dr. Erik De Clercq. Biochem Pharmacol 2021; 185:114485. [PMID: 33617841 PMCID: PMC7895689 DOI: 10.1016/j.bcp.2021.114485] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/17/2021] [Accepted: 02/17/2021] [Indexed: 12/15/2022]
Abstract
Since the 1950s, great efforts have been made to develop antiviral agents against many infectious diseases such as human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV), human cytomegalovirus (HCMV), herpes simplex virus (HSV), and varicella-zoster virus (VZV). Among the list of nearly 106 antiviral agents approved in the past five decades, Prof. Erik De Clercq has contributed to the development of 7 antiviral drugs: tenofovir disoproxil fumarate (Viread®) for HIV and HBV treatment, tenofovir alafenamide (Vemlidy®) for HIV and HBV treatment, brivudine (Zostex®) for HSV-1 and VZV treatment, valacyclovir (Valtrex®) for HSV and VZV treatment, adefovir dipivoxil (Hepsera®) for HBV treatment, stavudine (Zerit®) for HIV treatment, and cidofovir (Vistide®) for treating HCMV retinitis in AIDS patients. In addition to the above antiviral drugs, his contributions include two anti-cancer drugs: rabacfosadine (Tanovea®-CA1) for canine lymphoma and plerixafor (Mozobil®) for multiple myeloma and non-Hodgkin's lymphoma. These achievements are driven by his life-long passions for antiviral research and successful collaborations worldwide. To honor the 80th birthday of Prof. Erik De Clercq, this study highlights his scientific achievements and the importance of life-long passions and collaborations in the success of antiviral research and drug development.
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Affiliation(s)
- Guangdi Li
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha 410011, China; Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha 410078, China
| | - Ming Xu
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha 410078, China
| | - Tingting Yue
- Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha 410078, China
| | - Weijie Gu
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, KU Leuven, Leuven 3000, Belgium
| | - Li Tan
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha 410011, China.
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18
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Drug Discovery of Nucleos(t)ide Antiviral Agents: Dedicated to Prof. Dr. Erik De Clercq on Occasion of His 80th Birthday. Molecules 2021; 26:molecules26040923. [PMID: 33572409 PMCID: PMC7916218 DOI: 10.3390/molecules26040923] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/20/2021] [Accepted: 02/05/2021] [Indexed: 02/06/2023] Open
Abstract
Nucleoside and nucleotide analogues are essential antivirals in the treatment of infectious diseases such as human immunodeficiency virus (HIV), hepatitis B virus (HBV), hepatitis C virus (HCV), herpes simplex virus (HSV), varicella-zoster virus (VZV), and human cytomegalovirus (HCMV). To celebrate the 80th birthday of Prof. Dr. Erik De Clercq on 28 March 2021, this review provides an overview of his contributions to eight approved nucleos(t)ide drugs: (i) three adenosine nucleotide analogues, namely tenofovir disoproxil fumarate (Viread®) and tenofovir alafenamide (Vemlidy®) against HIV and HBV infections and adefovir dipivoxil (Hepsera®) against HBV infections; (ii) two thymidine nucleoside analogues, namely brivudine (Zostex®) against HSV-1 and VZV infections and stavudine (Zerit®) against HIV infections; (iii) two guanosine analogues, namely valacyclovir (Valtrex®, Zelitrex®) against HSV and VZV and rabacfosadine (Tanovea®-CA1) for the treatment of lymphoma in dogs; and (iv) one cytidine nucleotide analogue, namely cidofovir (Vistide®) for the treatment of HCMV retinitis in AIDS patients. Although adefovir dipivoxil, stavudine, and cidofovir are virtually discontinued for clinical use, tenofovir disoproxil fumarate and tenofovir alafenamide remain the most important antivirals against HIV and HBV infections worldwide. Overall, the broad-spectrum antiviral potential of nucleos(t)ide analogues supports their development to treat or prevent current and emerging infectious diseases worldwide.
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Abstract
Over the past 60 years, more than 100 antiviral drugs or their combinations have been approved for clinical use. Antiviral drugs can be classified according to their chemical nature (e.g., small-molecules, peptides, biologics) or mechanisms of drug actions against specific viral proteins (e.g., polymerase inhibitors, protease inhibitors, glycoprotein inhibitors). This article provides an overview of antiviral classifications in 10 important human viruses: hepatitis B virus (HBV), hepatitis C virus (HCV), human immunodeficiency virus (HIV), human cytomegalovirus (HCMV), herpes simplex virus (HSV), variola virus (human smallpox), varicella zoster virus (VZV), influenza virus, respiratory syncytial virus (RSV), and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
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20
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Rashidi-Alavijeh J, Straub K, Achterfeld A, Wedemeyer H, Willuweit K, Herzer K. Safety and efficacy of tenofovir alafenamide in liver transplant recipients: A single center experience. Transpl Infect Dis 2020; 23:e13522. [PMID: 33217163 DOI: 10.1111/tid.13522] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 10/17/2020] [Accepted: 11/07/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND Tenofovir disoproxil fumarate (TDF) is frequently used for treatment of and prophylaxis against reactivation of hepatitis B virus (HBV) after liver transplant (LT). Because TDF can lead to renal impairment and a decrease in bone mineral density (BMD), the prodrug tenofovir alafenamide (TAF) may be considered a viable alternative with fewer adverse effects. Only limited information is available about the use of TAF for LT recipients. We report a European single-center experience with TAF as treatment for LT patients. METHODS This retrospective analysis involved 29 LT recipients receiving standard immunosuppressants (mainly calcineurin inhibitors). Demographic and clinical data were documented at baseline upon switch to TAF and at various time points thereafter. RESULTS None of the patients experienced HBV reactivation after the switch to TAF. Liver and renal function remained stable. Drug levels of immunosuppressive agents did not change significantly after the switch. After 1 year, 22 patients were still taking TAF; two patients had been lost to follow-up; one patient had died; and four patients had discontinued therapy because of TAF-related adverse effects. No serious adverse effects were reported. CONCLUSIONS Tenofovir alafenamide exhibits high antiviral efficacy and a good safety profile for LT recipients. Still, the safety and tolerability of TAF for organ transplant patients should be evaluated in larger cohorts.
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Affiliation(s)
- Jassin Rashidi-Alavijeh
- Department of Gastroenterology and Hepatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Katja Straub
- Department of Gastroenterology and Hepatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Anne Achterfeld
- Department of Gastroenterology and Hepatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Heiner Wedemeyer
- Department of Gastroenterology and Hepatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Katharina Willuweit
- Department of Gastroenterology and Hepatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Kerstin Herzer
- Department of Gastroenterology and Hepatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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Ugwu EO, Eleje GU, Ugwu AO, Nwagha UI, Ikechebelu JI, Umeh UA, Okafor HU. Antivirals for prevention of hepatitis B virus mother-to-child transmission in human immunodeficiency virus positive pregnant women co-infected with hepatitis B virus. Hippokratia 2020. [DOI: 10.1002/14651858.cd013653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Emmanuel O Ugwu
- Obstetrics and Gynaecology; University of Nigeria Enugu Campus/University of Nigeria Teaching Hospital Ituko-Ozalla; Enugu Nigeria
| | - George U Eleje
- Effective Care Research Unit, Department of Obstetrics and Gynaecology; Faculty of Medicine, College of Health Sciences, Nnamdi Azikiwe University, Nnewi Campus; PMB 5001, Nnewi Nigeria
| | - Angela O Ugwu
- Haematology and Immunolology; University of Nigeria Nsukka/University of Nigeria Teaching Hospital Ituku Ozalla; Enugu Nigeria
| | - Uchenna I Nwagha
- Department of Obstetrics and Gynaecology, Faculty of Medicine; University of Nigeria Enugu Campus/University of Nigeria Teaching Hospital Ituko-Ozalla; Enugu Nigeria
| | - Joseph I Ikechebelu
- Department of Obstetrics/Gynaecology; Nnamdi Azikiwe University Teaching Hospital; Nnewi Nigeria
| | - Uchenna A Umeh
- Department of Obstetrics and Gynaecology, Faculty of Medical Science; College of Medicine, University of Nigeria Enugu Campus/University of Nigeria Teaching Hospital Ituku-Ozalla; Enugu Nigeria
| | - Henrietta U Okafor
- Department of Paediatrics; Faculty of Medical Sciences, College of Medicine, University of Nigeria Enugu Campus/University of Nigeria Teaching Hospital Ituku-Ozalla; Enugu Nigeria
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Massud I, Cong ME, Ruone S, Holder A, Dinh C, Nishiura K, Khalil G, Pan Y, Lipscomb J, Johnson R, Deyounks F, Rooney JF, Babusis D, Park Y, McCallister S, Callebaut C, Heneine W, García-Lerma JG. Efficacy of Oral Tenofovir Alafenamide/Emtricitabine Combination or Single-Agent Tenofovir Alafenamide Against Vaginal Simian Human Immunodeficiency Virus Infection in Macaques. J Infect Dis 2020; 220:1826-1833. [PMID: 31362305 DOI: 10.1093/infdis/jiz383] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/18/2019] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Tenofovir alafenamide (TAF)-based regimens are being evaluated for pre-exposure prophylaxis (PrEP). We used a macaque model of repeated exposures to simian human immunodeficiency virus (SHIV) to investigate whether TAF alone or the combination of TAF and emtricitabine (FTC) can prevent vaginal infection. METHODS Pigtail macaques were exposed vaginally to SHIV162p3 once a week for up to 15 weeks. Animals received clinical doses of FTC/TAF (n = 6) or TAF (n = 9) orally 24 hours before and 2 hours after each weekly virus exposure. Infection was compared with 21 untreated controls. RESULTS Five of the 6 animals in the FTC/TAF and 4 of the 9 animals in the TAF alone group were protected against infection (P = .001 and P = .049, respectively). The calculated efficacy of FTC/TAF and TAF was 91% (95% confidence interval [CI], 34.9%-98.8%) and 57.8% (95% CI, -8.7% to 83.6%), respectively. Infection in FTC/TAF but not TAF-treated macaques was delayed relative to controls (P = .005 and P = .114). Median tenofovir diphosphate (TFV-DP) levels in peripheral blood mononuclear cells (PBMCs) were similar among infected and uninfected macaques receiving TAF PrEP (351 and 143 fmols/106 cells, respectively; P = .921). CONCLUSIONS Emtricitabine/TAF provided a level of protection against vaginal challenge similar to FTC/TFV disoproxil fumarate combination in the macaque model. Our results support the clinical evaluation of FTC/TAF for PrEP in women.
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Affiliation(s)
- Ivana Massud
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Mian-Er Cong
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Susan Ruone
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Angela Holder
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Chuong Dinh
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Kenji Nishiura
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - George Khalil
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Yi Pan
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Jonathan Lipscomb
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Ryan Johnson
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Frank Deyounks
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | | | - Yeojin Park
- Gilead Sciences, Inc., Foster City, California
| | | | | | - Walid Heneine
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - J Gerardo García-Lerma
- Division of HIV/AIDS Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
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23
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Jiang Y, Gao X, Singh ON, Zhang W, Agrahari V, Peet MM, Clark MR, Doncel GF, Banga AK. Pharmacokinetics of a weekly transdermal delivery system of tenofovir alafenamide in hairless rats. Int J Pharm 2020; 582:119342. [PMID: 32315746 DOI: 10.1016/j.ijpharm.2020.119342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 04/06/2020] [Accepted: 04/14/2020] [Indexed: 02/06/2023]
Abstract
Tenofovir alafenamide (TAF) is a potent prodrug of tenofovir (TFV) for HIV prophylaxis, and HIV and HBV treatment. Compared to oral daily doses, transdermal administration of TAF may be more advantageous for long-term adherence by offering sustained drug delivery and reduced dosing frequency. Here, we described the plasma pharmacokinetics (PK) of an optimized once-weekly suspension transdermal delivery system (TDS) for TAF (96 mg/25 cm2 of TDS) in female hairless rats. Over the study period, the TAF TDS delivered an overall low level of TAF (median: 1.43 [0.02-3.28] ng/mL) and a sustained level of the stable metabolite and parent drug, TFV. Relative to the projected exposure corresponding to six-day oral daily doses, a comparable TAF exposure but a substantially lower TFV exposure was resulted from the TAF TDS, suggesting a lower risk of TFV-associated adverse effects. TAF, TFV, and phosphorylated TFVs (TFV-monophosphate and diphosphate) were found distributed in vaginal tissue, the portal of entry for HIV during male-to-female sexual transmission. Skin adhesion and tolerance were acceptable given the animal model used. PK evaluation of the TAF TDS in hairless rats demonstrates the proof of concept that transdermal delivery can be an alternative route for a sustained, once-weekly systemic delivery of TAF.
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Affiliation(s)
- Ying Jiang
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, United States
| | - Xinyi Gao
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, United States
| | - Onkar N Singh
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, United States
| | - Wei Zhang
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, United States
| | - Vivek Agrahari
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, United States
| | - M Melissa Peet
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, United States
| | - Meredith R Clark
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, United States
| | - Gustavo F Doncel
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, United States
| | - Ajay K Banga
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, United States.
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Eke AC, Brooks KM, Gebreyohannes RD, Sheffield JS, Dooley KE, Mirochnick M. Tenofovir alafenamide use in pregnant and lactating women living with HIV. Expert Opin Drug Metab Toxicol 2020; 16:333-342. [PMID: 32125906 DOI: 10.1080/17425255.2020.1738384] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Introduction: Tenofovir alafenamide (TAF)-containing fixed-dose drug combinations (FDCs) are increasingly being used in managing pregnant women living with HIV. However, TAF is not currently recommended during pregnancy due to limited pharmacokinetic and safety data. TAF, a newer nucleotide phosphonamidate prodrug of tenofovir (TFV), achieves high levels of tenofovir-diphosphate in lymphoid cells and hepatocytes, and 90% lower systemic concentrations of TFV compared to tenofovir disoproxil fumarate (TDF), thereby maximizing TAF's antiviral efficacy, potency and clinical safety.Areas covered: This review discusses the currently available information on the pharmacology of TAF in pregnant women living with HIV. Pharmacokinetic studies with TAF during pregnancy have yielded varying results compared to postpartum, but TAF exposures during pregnancy have been within the range of those typically observed in non-pregnant adults. The efficacy and safety of TAF in treatment-naïve pregnant women living with HIV is currently being evaluated in the VESTED study, a phase-III NIH randomized clinical trial.Expert opinion: Initial pregnancy data suggest that TAF-based FDCs have high efficacy and low risk of adverse effects during pregnancy. TAF is likely to become part of first-line regimens for use in pregnant women living with HIV once additional pregnancy data from phase III trials are available.
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Affiliation(s)
- Ahizechukwu C Eke
- Division of Maternal Fetal Medicine & Clinical Pharmacology, Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Doctoral Training Program (Phd), Graduate Training Program in Clinical Investigation (GTPCI), Johns Hopkins University School of Public Health, Baltimore, MD, USA
| | - Kristina M Brooks
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Rahel D Gebreyohannes
- Department of Obstetrics & Gynecology, Addis Ababa University College of Health Science, Addis Ababa, Ethiopia
| | - Jeanne S Sheffield
- Division of Maternal Fetal Medicine & Clinical Pharmacology, Department of Gynecology & Obstetrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kelly E Dooley
- Division of Clinical Pharmacology & Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mark Mirochnick
- Division of Neonatology, Department of Pediatrics, Boston University School of Medicine, Boston, MA, USA
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Abstract
Currently, despite the use of a preventive vaccine for several decades as well as the use of effective and well-tolerated viral suppressive medications since 1998, approximately 250 million people remain infected with the virus that causes hepatitis B worldwide. Hepatitis C virus (HCV) and hepatitis B virus (HBV) are the leading causes of liver cancer and overall mortality globally, surpassing malaria and tuberculosis. Linkage to care is estimated to be very poor both in developing countries and in high-income countries, such as the United States, countries in Western Europe, and Japan. In the United States, by CDC estimates, only one-third of HBV-infected patients or less are aware of their infection. Some reasons for these low rates of surveillance, diagnosis, and treatment include the asymptomatic nature of chronic hepatitis B until the very late stages, a lack of curative therapy with a finite treatment duration, a complex natural history, and a lack of knowledge about the disease by both care providers and patients. In the last 5 years, more attention has been focused on the important topics of HBV screening, diagnosis of HBV infection, and appropriate linkage to care. There have also been rapid clinical developments toward a functional cure of HBV infection, with novel compounds currently being in various phases of progress. Despite this knowledge, many of the professional organizations provide guidelines focused only on specific questions related to the treatment of HBV infection. This focus leaves a gap for care providers on the other HBV-related issues, which include HBV's epidemiological profile, its natural history, how it interacts with other viral hepatitis diseases, treatments, and the areas that still need to be addressed in order to achieve HBV elimination by 2030. Thus, to fill these gaps and provide a more comprehensive and relevant document to regions worldwide, we have taken a global approach by using the findings of global experts on HBV as well as citing major guidelines and their various approaches to addressing HBV and its disease burden.
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Straubinger T, Kay K, Bies R. Modeling HIV Pre-Exposure Prophylaxis. Front Pharmacol 2020; 10:1514. [PMID: 32082142 PMCID: PMC7005100 DOI: 10.3389/fphar.2019.01514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 11/21/2019] [Indexed: 11/26/2022] Open
Abstract
Pre-exposure prophylaxis (PrEP) has emerged as a promising strategy for preventing the transmission of HIV. Although only one formulation is currently approved for PrEP, research into both new compounds and new delivery systems for PrEP regimens offer intriguing challenges from the perspective of pharmacokinetic and pharmacodynamic modeling. This review aims to provide an overview the current modeling landscape for HIV PrEP, focused on PK/PD and QSP models relating to antiretroviral agents. Both current PrEP treatments and new compounds that show promise as PrEP agents are highlighted, as well as models of uncommon administration routes, predictions based on models of mechanism of action and viral dynamics, and issues related to adherence to therapy. The spread of human immunodeficiency virus (HIV) remains one of the foremost global health concerns. In the absence of a vaccine, other prophylactic strategies have been developed to prevent HIV transmission. One approach, known as pre-exposure prophylaxis (PrEP), allows HIV-negative individuals who are at high risk of exposure to the virus, be it through an HIV-positive sexual partner or through the shared use of drug injection equipment, to substantially reduce the risk of developing an HIV infection. PrEP is a relatively recent approach to combating the HIV epidemic, with the only currently approved treatment being Truvada, a daily oral antiretroviral (ARV) therapy initially indicated in the treatment of active HIV-1 infections, but approved for HIV PrEP in 2012. Although PrEP therapy has consistently demonstrated high efficacy in preventing HIV infection, this efficacy is dependent on patient adherence to the prescribed treatment regimen. This can present a significant problem in low- and middle-income countries, which may lack the infrastructure to provide sufficient access to PrEP medication to maintain daily dosing regimens. Furthermore, while the conventional approach has generally been to advocate for continuous administration akin to regimens used for viral suppression in infected patients, there has been some discussion of whether a better treatment paradigm might be to push for PrEP therapy primarily during those known periods of heightened exposure risk, while relying on post-exposure prophylaxis regimens to prevent infection after unanticipated exposures during low-risk periods. These considerations have led to a push for the development of long-duration and on-demand PrEP formulations, including subdermal and subcutaneous implants, slow-release intramuscular depot injections, vaginal and rectal antimicrobial gels, and intravaginal rings and dissolving films. PrEP therapy is a quickly evolving field, with a variety of antiretroviral compounds and formulations under investigation. This review aims to report on notable drugs and formulations from a pharmacokinetic/pharmacodynamic (PK/PD) modeling perspective. Given the nature of PrEP as a preventive therapy designed for long-term use, clinical trials for PrEP therapies can last for months or even years, particularly in the case of long-duration formulations. Furthermore, in contrast to antiretroviral trials in infected patients, pharmacodynamic endpoints in PrEP therapies are difficult to quantify, as the primary endpoint for efficacy is generally the rate of seroconversion. Computational modeling approaches offer flexible and powerful tools to provide insight into drug behavior in clinical settings, and can ultimately reduce the time, expense, and patient burden incurred in the development of PrEP therapies.
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Affiliation(s)
- Thomas Straubinger
- Department of Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, United States
| | - Katherine Kay
- Metrum Research Group, Tariffville, CT, United States
| | - Robert Bies
- Department of Pharmaceutical Sciences, State University of New York at Buffalo, Buffalo, NY, United States
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Pastuch-Gawołek G, Gillner D, Król E, Walczak K, Wandzik I. Selected nucleos(t)ide-based prescribed drugs and their multi-target activity. Eur J Pharmacol 2019; 865:172747. [PMID: 31634460 PMCID: PMC7173238 DOI: 10.1016/j.ejphar.2019.172747] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/16/2019] [Accepted: 10/17/2019] [Indexed: 12/13/2022]
Abstract
Nucleos(t)ide analogues play pivotal roles as antiviral, cytotoxic or immunosuppressive agents. Here, we review recent reports of nucleoside analogues that exhibit broad-spectrum activity towards multiple life-threatening RNA and DNA viruses. We also present a discussion about nucleoside antimetabolites-approved antineoplastic agents-that have recently been shown to have antiviral and/or antibacterial activity. The approved drugs and drug combinations, as well as recently identified candidates for investigation and/or experimentation, are discussed. Several examples of repurposed drugs that have already been approved for use are presented. This strategy can be crucial for the first-line treatment of acute infections or coinfections and for the management of drug-resistant strains.
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Affiliation(s)
- Gabriela Pastuch-Gawołek
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland; Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland
| | - Danuta Gillner
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland; Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland
| | - Ewelina Król
- Department of Recombinant Vaccines, Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
| | - Krzysztof Walczak
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland
| | - Ilona Wandzik
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland; Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland.
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Coudray M, Kiplagat S, Saumell F, Madhivanan P. Sexually transmitted infections among high-risk populations that use treatment as prevention or pre-exposure prophylaxis: a protocol for a systematic review. BMJ Open 2019; 9:e032054. [PMID: 31811008 PMCID: PMC6924850 DOI: 10.1136/bmjopen-2019-032054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Among men who have sex with men, pre-exposure prophylaxis (PrEP) reduces the risk of HIV by 95%. Based on the documented benefits, the Centre for Disease Control and Prevention has recommended PrEP as a prevention method for high-risk groups. Moreover, for those HIV-infected individuals, antiretroviral therapy has been shown to serve as both as a treatment and prevention method for HIV. METHODS AND ANALYSIS This systematic review protocol was reported according to the Preferred Reporting Items for Systematic reviews and Analyses (PRISMA) P framework. Medline (1980-present), Embase (1980-present), CINAHL (1980-present), Cochrane Central Register of Controlled Trials and clinicaltrials.gov will be used to identify relevant articles based on a piloted search strategy. Peer-reviewed observational and experimental studies will be included. A narrative style will be used to describe descriptive data. A meta-analysis will be conducted if heterogeneity is not significant. ETHICS AND DISSEMINATION Recent evidence suggests that there is an increased risk of sexually transmitted infections (STIs) among high-risk persons that use PrEP. Furthermore, there is a paucity of data on the relationship of treatment as prevention and incidence of STIs. The findings of this review will assess this emerging public health phenomenon and serve to inform future public health policy. No formal ethical review is required for this protocol. All findings will be published in a peer reviewed journal. PROTOCOL REGISTRATION NUMBER CRD42019128720.
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Affiliation(s)
- Makella Coudray
- Epidemiology, Florida International University, Miami, Florida, USA
| | - Sandra Kiplagat
- Epidemiology, Florida International University, Miami, Florida, USA
| | - Franklin Saumell
- Epidemiology, Florida International University, Miami, Florida, USA
| | - Purnima Madhivanan
- Health Promotion Sciences, Mel & Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, United States
- Internal Medicine, Division of Infectious Diseases, College of Medicine, University of Arizona, Tucson, Arizona, United States
- Family & Community Medicine, College of Medicine, University of Arizona, Tucson, Arizona, United States
- Public Health Research Institute of India, Mysore, Karnataka, India
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Puri A, Bhattaccharjee SA, Zhang W, Clark M, Singh O, Doncel GF, Banga AK. Development of a Transdermal Delivery System for Tenofovir Alafenamide, a Prodrug of Tenofovir with Potent Antiviral Activity Against HIV and HBV. Pharmaceutics 2019; 11:pharmaceutics11040173. [PMID: 30970630 PMCID: PMC6523937 DOI: 10.3390/pharmaceutics11040173] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 11/16/2022] Open
Abstract
Tenofovir alafenamide (TAF) is an effective nucleotide reverse transcriptase inhibitor that is used in the treatment of HIV-1 and HBV. Currently, it is being investigated for HIV prophylaxis. Oral TAF regimens require daily intake, which hampers adherence and increases the possibility of viral resistance. Long-acting formulations would significantly reduce this problem. Therefore, the aim of this study was to develop a transdermal patch containing TAF and investigate its performance in vitro through human epidermis. Two types of TAF patches were manufactured. Transparent patches were prepared using acrylate adhesive (DURO-TAK 87-2516), and suspension patches were prepared using silicone (BIO-PSA 7-4301) and polyisobutylene (DURO-TAK 87-6908) adhesives. In vitro permeation studies were performed while using vertical Franz diffusion cells for seven days. An optimized silicone-based patch was characterized for its adhesive properties and tested for skin irritation. The acrylate-based patches, comprising 2% w/w TAF and a combination of chemical enhancers, showed a maximum flux of 0.60 ± 0.09 µg/cm²/h. However, the silicone-based patch comprising of 15% w/w TAF showed the highest permeation (7.24 ± 0.47 μg/cm²/h). This study demonstrates the feasibility of developing silicone-based transdermal patches that can deliver a therapeutically relevant dose of TAF for the control of HIV and HBV infections.
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Affiliation(s)
- Ashana Puri
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA.
| | - Sonalika A Bhattaccharjee
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA.
| | - Wei Zhang
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, USA.
| | - Meredith Clark
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, USA.
| | - Onkar Singh
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, USA.
| | - Gustavo F Doncel
- CONRAD, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Arlington, VA 22209, USA.
| | - Ajay K Banga
- Center for Drug Delivery Research, Department of Pharmaceutical Sciences, College of Pharmacy, Mercer University, Atlanta, GA 30341, USA.
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30
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Brooks KM, Sherman EM, Egelund EF, Brotherton A, Durham S, Badowski ME, Cluck DB. Integrase Inhibitors: After 10 Years of Experience, Is the Best Yet to Come? Pharmacotherapy 2019; 39:576-598. [PMID: 30860610 DOI: 10.1002/phar.2246] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The era of the integrase strand transfer inhibitors (INSTIs) for the treatment of human immunodeficiency virus (HIV) infection began with raltegravir in 2007. Since that time, several other INSTIs have been introduced including elvitegravir, dolutegravir, and, most recently, bictegravir, that have shown great utility as part of antiretroviral regimens in both treatment-naive and treatment-experienced patients. At present, antiretroviral guidelines fully endorse the INSTI class as part of all first-line treatment regimens. After 10 years of experience with INSTIs, newer agents are on the horizon such as cabotegravir and MK-2048 for potential use as either HIV pre-exposure prophylaxis or maintenance therapy. This review provides a brief overview of the INSTI class including agents currently available and those still in development, reviews available data from both completed and ongoing clinical trials, and outlines simplification strategies using INSTIs.
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Affiliation(s)
- Kristina M Brooks
- Department of Pharmaceutical Sciences, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, Colorado
| | - Elizabeth M Sherman
- Department of Pharmacy Practice, Nova Southeastern University, Fort Lauderdale, Florida
| | - Eric F Egelund
- Department of Pharmacotherapy & Translational Research, University of Florida College of Pharmacy, Jacksonville, Florida
| | - Amy Brotherton
- Department of Pharmacy, The Miriam Hospital, Providence, Rhode Island
| | - Spencer Durham
- Department Pharmacy Practice, Auburn University Harrison School of Pharmacy, Auburn, Alabama
| | - Melissa E Badowski
- Department of Pharmacy Practice, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois
| | - David B Cluck
- Department of Pharmacy Practice, East Tennessee State University Gatton College of Pharmacy, Johnson City, Tennessee
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31
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Zhang H, Xie M, Qu G, Chang J. Dynamic Kinetic Resolution of α-Purine Substituted Alkanoic Acids: Access to Chiral Acyclic Purine Nucleosides. Org Lett 2019; 21:120-123. [PMID: 30557022 DOI: 10.1021/acs.orglett.8b03555] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An efficient route to construct chiral acyclic purine nucleoside analogues via dynamic kinetic resolution of α-purine substituted alkanoic acids is reported. Using ( S)-BTM as the catalyst, diverse chiral acyclic purine nucleoside analogues were obtained in moderate to good yields (up to 93%) and high enantioselectivities (up to 98% ee). Chiral acyclic purine nucleosides could be obtained from the esterified products via reduction reaction, which could then be transferred into Tenofovir analogues.
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Affiliation(s)
- Huifang Zhang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Mingsheng Xie
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Guirong Qu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , China
| | - Junbiao Chang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , China
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32
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Abstract
Hepatitis B virus (HBV) and hepatitis C virus (HCV) infections are the major causes of chronic liver disease. HBV and HCV affect nearly 7% of the world's population. Extra-hepatic complications and particularly renal failure have different mechanisms and manifestations. The underlying mechanism, although differing for each disease, mainly involves the immune system and antibody deposits in the kidney, which can lead to tissue damage. Areas covered: We do not cover in this review hepatorenal syndrome. We report on the renal complications of viral hepatitis (HBV, HCV, hepatitis E), autoimmune hepatitis, cirrhosis, and Wilson's disease. The most frequent renal disorders are those related to HBV, and HCV due to their high prevalence worldwide. Expert commentary: Thanks to generalization of vaccination against HBV, prevalence of HBV-related liver diseases will decrease, and thereby its associated renal involvement such as polyarteritis nodosa (an exceptional condition), and glomerulonephritis such as membranous nephropathy. Thanks to direct acting antiviral agents HCV infection will be cured within the next decade. However, HCV-related cryoglobulinemia with or without renal involvement might evolve on its own after the patient has eliminated HCV, necessitating then rituximab therapy. Conversely, orofecal-transmitted hepatitis viruses such as hepatitis A and hepatitis E are still very prevalent in developing countries; however, they are rarely associated with renal manifestations.
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Affiliation(s)
- Johan Noble
- a Service de Néphrologie, Hémodialyse , Aphérèses et Transplantation rénale , Grenoble-Alpes , France.,b Université Joseph Fourier , Grenoble-Alpes , France
| | - Thomas Jouve
- a Service de Néphrologie, Hémodialyse , Aphérèses et Transplantation rénale , Grenoble-Alpes , France.,b Université Joseph Fourier , Grenoble-Alpes , France
| | - Paolo Malvezzi
- a Service de Néphrologie, Hémodialyse , Aphérèses et Transplantation rénale , Grenoble-Alpes , France.,b Université Joseph Fourier , Grenoble-Alpes , France
| | - Lionel Rostaing
- a Service de Néphrologie, Hémodialyse , Aphérèses et Transplantation rénale , Grenoble-Alpes , France.,b Université Joseph Fourier , Grenoble-Alpes , France
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De Clercq E. Tanovea® for the treatment of lymphoma in dogs. Biochem Pharmacol 2018; 154:265-269. [PMID: 29778492 DOI: 10.1016/j.bcp.2018.05.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 05/15/2018] [Indexed: 01/04/2023]
Abstract
Tanovea® (first named GS-9219, then VDC-1101, generic name: rabacfosadine) is a pro-prodrug or "double" prodrug of PMEG [9-(2-phosphonylmethoxyethyl)guanine], which has been conditionally approved by the US FDA (Food and Drug Administration) for the treatment of lymphoma in dogs. Tanovea has been demonstrated to be effective against non-Hodgkin's lymphoma (NHL) in dogs, as well as canine cutaneous T-cell lymphoma, spontaneous canine multiple myeloma, naïve canine multicentric lymphoma and relapsed canine B-cell lymphoma. As a double prodrug of PMEG, GS-9219 is first converted intracellularly by hydrolysis to cPr-PMEDAP, then deaminated to PMEG, which is then phosphorylated twice to its active metabolite PMEGpp, acting at the level of the cellular DNA polymerases.
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Affiliation(s)
- Erik De Clercq
- KU Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Herestraat 49, 3000 Leuven, Belgium.
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