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Ouyang Y, Fu X, Peng S, Tan D, Fu L. Plasma miR-146a predicts serological conversion of hepatitis B e-antigen (HBeAg) in chronic hepatitis B patients treated with nucleotide analogs. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:449. [PMID: 31700885 DOI: 10.21037/atm.2019.08.72] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background To investigate the association of plasma miR-146a with serological conversion of hepatitis B e-antigen (HBeAg) in patients with chronic hepatitis B (CHB) treated with nucleotide analogs (NAs). Methods This was a retrospective study of 115 HBeAg-positive patients with CHB treated at Xiangya Hospital, Central South University, Changsha, China, between September 2009 and March 2014. Patients were grouped according to whether they had achieved seroconversion of HBeAg by 104 weeks of NAs treatment. We assessed plasma miR-146a using miScript polymerase chain reaction (PCR). Serum alanine transaminase (ALT), hepatitis B virus (HBV) deoxyribonucleic acid (DNA) load, hepatitis B surface antigen (HBsAg) titer, HBeAg titer, and plasma miR-146a were measured at 0, 24, 48, and 104 weeks of treatment. Finally, we also determined ΔmiR-146a24w and ΔmiR-146a48w. Results ΔmiR-146a48w was independently associated with seroconversion of HBeAg at 104 weeks [odds ratio (OR) =1.302; 95% confidence interval (CI), 1.159-1.962; P=0.029]. We obtained an area under the receiver operating characteristic (ROC) curve (AUC) of ΔmiR-14648w of 0.757 for seroconversion of HBeAg (P=0.013). At the optimal cutoff value equivalent to a Youden index of 67.9%, the specificity and sensitivity of ΔmiR-14648w were 63.7% and 88.3%, respectively. Positive (PPV) and negative (NPV) predictive values were 70.87% and 84.48%, respectively. Conclusions ΔmiR-146a48w was independently associated with seroconversion of HBeAg in CHB patients treated with NAs.
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Affiliation(s)
- Yi Ouyang
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha 410008, China.,Hunan Key Laboratory of Viral Hepatitis, Changsha 410008, China
| | - Xiaoyu Fu
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha 410008, China.,Hunan Key Laboratory of Viral Hepatitis, Changsha 410008, China
| | - Shifang Peng
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha 410008, China.,Hunan Key Laboratory of Viral Hepatitis, Changsha 410008, China
| | - Deming Tan
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha 410008, China.,Hunan Key Laboratory of Viral Hepatitis, Changsha 410008, China
| | - Lei Fu
- Department of Infectious Diseases, Xiangya Hospital, Central South University, Changsha 410008, China.,Hunan Key Laboratory of Viral Hepatitis, Changsha 410008, China
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Chen B, Chen L, Cheng C, Zhong M, Shi X, Zhang J, Wang B. Determination of telbivudine in the plasma of chronic hepatitis B patients in long-term treatment by high-performance liquid chromatographic-tandem mass spectrometry. Biomed Chromatogr 2018; 32. [PMID: 29148589 DOI: 10.1002/bmc.4140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 09/22/2017] [Accepted: 11/03/2017] [Indexed: 11/10/2022]
Abstract
Creatine kinase elevation is commonly reported in telbivudine-treated patients. However, little is known about the relationship between this adverse drug reaction and plasma concentration. In this study, a sensitive, rapid and safe quantitative bioanalytical method has been established by using LC-MS/MS for the determination of telbivudine in a clinical study of chronic hepatitis B patients. The assay was linear in a dynamic 10-10,000 ng/mL range (r2 > 0.999) and total analysis time was 6 min in this method. The validated method was applied to quantitatively determine plasma concentration in chronic hepatitis B patients during long-term telbivudine treatment. The results revealed that telbivudine concentration in the creatine kinase-elevated group (707.92-2788.78 ng/mL) was significantly higher than those with normal creatine kinase (412.63-1108.32 ng/mL). This method was adapted for therapeutic drug monitoring.
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Affiliation(s)
- Bicui Chen
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Li Chen
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Cai Cheng
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Mingkang Zhong
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Xiaojin Shi
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiming Zhang
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
| | - Bin Wang
- Department of Pharmacy, Huashan Hospital, Fudan University, Shanghai, China
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Lin MT, Yen YH, Tsai MC, Tseng PL, Chang KC, Wu CK, Hu TH. Comparison of the Efficacies and Safety of Combined Therapy between Telbivudine Plus Adefovir and Lamivudine Plus Adefovir in Patients with Hepatitis B Virus Infection in Real-World Practice. PLoS One 2016; 11:e0165416. [PMID: 27806120 PMCID: PMC5091898 DOI: 10.1371/journal.pone.0165416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 10/11/2016] [Indexed: 01/10/2023] Open
Abstract
Background and Aim Chronic hepatitis B infection remains a significant health issue worldwide. This study evaluated the efficacy and safety of combined therapy using lamivudine plus adefovir (LAM+ADV) versus telbivudine plus adefovir (LdT+ADV) and the corresponding renal function change and safety. Methods This study enrolled a total of 171 patients (110 patients received LAM+ADV and 60 patients received LdT+ADV). We analyzed the changes in renal function using the estimated glomerular filtration rate (eGFR). The DNA undetectable rate, hepatitis B e antigen (HBeAg) seroconversion rate, and alanine aminotransferase (ALT) normalization rate were analyzed. We checked the serum uric acid, phosphate and creatine kinase, and lactic acid levels to analyze safety. We observed these patients for 48 to 240 weeks and checked their serum profile every 6 months. Results There was no statistically significant difference between the two groups in anti-hepatitis B virus (HBV) efficacy in terms of DNA undetectable rate, ALT normalization rate, and HBeAg seroconversion rate. Both the LAM+ADV and LdT+ADV groups had stable or improved renal function. However, a higher eGFR was found in the LdT+ADV group with continuous serum fluctuation during 3 years of combined therapy as well as a higher serum creatine kinase level. Conclusions Long-term LdT+ADV combined therapy and LAM+ADV combined therapy were both associated with stable or improved renal function. The clinical efficacy was similar between the two groups, but the LdT group had a higher serum creatine kinase level. We need to monitor the data regularly in clinical practice.
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Affiliation(s)
- Ming-Tsung Lin
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan
| | - Yi-Hao Yen
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan
| | - Ming-Chao Tsai
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan
| | - Po-Lin Tseng
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan
| | - Kuo-Chin Chang
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan
| | - Cheng-Kun Wu
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan
| | - Tsung-Hui Hu
- Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taiwan
- * E-mail:
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Chen L, Cheng C, Chen B, Zhao Y, Zhang J, Wang B. Cumulative incidence and risk factors of creatine kinase elevation associated with telbivudine. Eur J Clin Pharmacol 2015; 72:235-41. [PMID: 26566799 DOI: 10.1007/s00228-015-1978-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 11/03/2015] [Indexed: 12/18/2022]
Abstract
PURPOSE An increasing number of studies are reporting a high frequency of creatine kinase (CK) elevation during telbivudine therapy; however, few reports have focused on the cumulative incidence and risk factors of CK elevation. This study was performed to investigate the cumulative incidence and risk factors of CK elevation in Chinese patients treated with telbivudine. METHODS In this observational study, patients with chronic hepatitis B receiving telbivudine therapy between July 2008 and December 2013 were enrolled. The cumulative incidence of CK elevation was analyzed using the Kaplan-Meier method combined with the log rank test. Risk factors were determined using Cox proportional hazards regression models. RESULTS A total of 207 eligible patients were analyzed. The cumulative incidence of CK elevation at 12, 24, 36, 48, 60, and 72 months was 51.2 %, 68.9 %, 75.1 %, 78.1 %, 78.1 %, and 78.1 %, respectively. Multivariate analysis revealed that male and lower baseline estimated glomerular filtration rate (eGFR) were significant risk factors for CK elevation. CONCLUSIONS The cumulative incidence of CK elevation after long-term telbivudine use is quite high, and gender and baseline eGFR may be useful predictors. However, when combined with regular monitoring of CK levels, especially for patients with lower eGFR, telbivudine is a relatively safe nucleoside analog treatment for chronic hepatitis B.
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Affiliation(s)
- Li Chen
- Department of Pharmacy, HuaShan Hospital, Fudan University, No. 12 Middle Wu Lu Mu Qi Road, Shanghai, 200040, China
| | - Cai Cheng
- College of Pharmacy, Fudan University, Shanghai, China
| | - Bicui Chen
- Department of Pharmacy, HuaShan Hospital, Fudan University, No. 12 Middle Wu Lu Mu Qi Road, Shanghai, 200040, China
| | - Yue Zhao
- Department of Pharmacy, HuaShan Hospital, Fudan University, No. 12 Middle Wu Lu Mu Qi Road, Shanghai, 200040, China
| | - Jiming Zhang
- Department of Infectious Diseases, HuaShan Hospital, Fudan University, No. 12 Middle Wu Lu Mu Qi Road, Shanghai, 200040, China.
| | - Bin Wang
- Department of Pharmacy, HuaShan Hospital, Fudan University, No. 12 Middle Wu Lu Mu Qi Road, Shanghai, 200040, China.
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Yapali S, Turan I, Ozutemiz O, Tekesin O. A severe case of esophageal ulcer causing a tight stricture despite long-term D-penicillamine treatment. Wien Klin Wochenschr 2014; 126:789-91. [DOI: 10.1007/s00508-014-0610-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Accepted: 08/29/2014] [Indexed: 10/24/2022]
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Lui YYN, Chan HLY. Treatment of chronic hepatitis B: focus on telbivudine. Expert Rev Anti Infect Ther 2014; 7:259-68. [DOI: 10.1586/eri.09.6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Tortorici MA, Cutler D, Zhang L, Pfister M. Design, conduct, analysis, and interpretation of clinical studies in patients with impaired kidney function. J Clin Pharmacol 2012; 52:109S-18S. [PMID: 22232746 DOI: 10.1177/0091270011416364] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Chronic kidney disease has been shown to alter the pharmacokinetics of drugs that are eliminated not only via the renal pathway but also by metabolism or nonrenal transport. Guidance documents from regulatory agencies on the pharmacokinetics of drugs in patients with impaired kidney function provide a framework for facilitating study design, conduct, data analysis, and the generation of dosing recommendations. Design considerations include establishment of appropriate enrollment criteria, selection of appropriate matched control group(s), and staging of impaired kidney function by estimated glomerular filtration rate or creatinine clearance. When studies in hemodialysis patients are conducted, optimizing the timing of characterization of the pharmacokinetics profile based on the schedule of hemodialysis sessions will allow for a robust assessment in these patients. In addition to traditional noncompartmental approaches, the use of pharmacometric approaches can integrate data from multiple clinical studies and provide a quantitative rationale for dose selection in patients with impaired kidney function. This article addresses the challenges and opportunities associated with the design, conduct, analysis, and interpretation of clinical studies to allow for their future facilitation and for the establishment of safe and efficacious dosing in patients with impaired kidney function.
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Einollahi B. Therapy for HBV Infection in Hemodialysis Patients: Is it Possible? HEPATITIS MONTHLY 2012; 12:153-7. [PMID: 22550522 PMCID: PMC3339414 DOI: 10.5812/hepatmon.834] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Revised: 01/12/2012] [Accepted: 01/29/2012] [Indexed: 01/09/2023]
Affiliation(s)
- Behzad Einollahi
- Nephrology and Urology Research Center, Baqiyatallah University of Medical Sciences, Tehran, IR Iran
- Corresponding author: Behzad Einollahi, Nephrology and Urology Research Center, Baqiyatallah University of Medical Sciences, Ground Floorof Baqiyatallah Hospital, Mollasdra Ave., Vanak Sq., Tehran, IR Iran. Tel.: +98-2181262073, Fax: +98-2181262073, E-mail:
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Therapy for HBV Infection in Hemodialysis Patients: Is it Possible? HEPATITIS MONTHLY 2012. [DOI: 10.5812/hepatmon.5081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Abstract
IMPORTANCE OF THE FIELD Successful treatment of chronic hepatitis B (CHB) often requires long-term oral nucleoside/nucleotide agents which can be associated with viral resistance, patient non-compliance and adverse effects. Telbivudine is one of the more potent options available, with a 6.5- to 6.6-log copies/ml hepatitis B DNA reduction at 12 weeks in an early viral kinetic study, a potency comparable to entecavir. It is also one of the few drugs in the treatment of CHB under FDA pregnancy Category B. AREAS COVERED IN THIS REVIEW The efficacy and safety profile of telbivudine in compensated and decompensated CHB patients compared to other agents are discussed. Viral resistance, characteristic adverse effects including elevation in creatine kinase and peripheral neuropathy in telbivudine treatment are reviewed. Infrequent but significant adverse effects of other nucleoside/nucleotide analogs are highlighted. WHAT THE READER WILL GAIN Readers are provided the latest update on the clinical profile of long-term use of telbivudine. TAKE HOME MESSAGE Long-term telbivudine treatment offers effective viral suppression to CHB patients with certain baseline characteristics and on-treatment virologic response. Creatine kinase elevation is not a good predictor of muscle-related adverse effects with nucleoside/nucleotide analogs. But significant myopathy and neuropathy have been reported in a small number of patients receiving telbivudine.
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Affiliation(s)
- David Yiu-Kuen But
- University of Hong Kong, Queen Mary Hospital, Department of Medicine, Pokfulam Road, Hong Kong SAR, China
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Abstract
Telbivudine (Sebivo®; Tyzeka®) is a synthetic nucleoside analogue that inhibits replication of hepatitis B virus (HBV). It is used in the treatment of adults with chronic hepatitis B (CHB) with evidence of viral replication and persistently elevated serum ALT and/or AST levels, and/or histological evidence of active disease. Telbivudine is a potent antiviral that provides effective and sustained viral suppression in patients with compensated CHB. In clinical trials, treatment outcomes were improved significantly more with telbivudine 600 mg once daily than with lamivudine 100 mg or adefovir 10 mg once daily, and telbivudine-treated patients had significantly less viral resistance than lamivudine-treated patients. Increasing rates of hepatitis B e antigen (HBeAg) seroconversion were achieved in HBeAg-positive patients during periods of up to 4 years continuous telbivudine treatment, and seroconversion was durable in most patients throughout a 2-year, off-treatment follow-up, indicating the potential for a finite treatment period in this group of patients. Telbivudine is associated with a medium genetic barrier to resistance and, as patients with undetectable HBV DNA levels have significantly improved outcomes, it is recommended that HBV DNA levels are monitored at week 24 (and 6 monthly thereafter), with the addition of a nucleoside/nucleotide analogue without cross resistance (such as adefovir dipivoxil) if viraemia is present to reduce the risk of resistance (Roadmap concept). Telbivudine was generally well tolerated in clinical trials for periods of up to 4 years, and has a similar tolerability profile to that of lamivudine. A minority of telbivudine-treated patients experience creatinine kinase elevation, usually transient, and myopathy occurs rarely. In modelled cost effectiveness studies in several Asian countries, treatment with telbivudine Roadmap was cost effective in HBeAg-positive patients. Thus, telbivudine provides a valuable treatment option in CHB, particularly when administered using the Roadmap concept in HbeAg-positive patients.
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Dowling TC, Matzke GR, Murphy JE, Burckart GJ. Evaluation of Renal Drug Dosing: Prescribing Information and Clinical Pharmacist Approaches. Pharmacotherapy 2010; 30:776-86. [DOI: 10.1592/phco.30.8.776] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Poordad F, Zeldin G, Harris SI, Ke J, Xu L, Mayers D, Zhou XJ. Absence of effect of telbivudine on cardiac repolarization: results of a thorough QT/QTc study in healthy participants. J Clin Pharmacol 2009; 49:1436-46. [PMID: 19833860 DOI: 10.1177/0091270009337943] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The effect of telbivudine on cardiac repolarization was evaluated in healthy participants at clinical and supratherapeutic doses. Sixty-two participants were enrolled, stratified by sex, and randomized according to a crossover design among 4 treatment sequences: placebo, a single moxifloxacin 400-mg dose as positive calibrator, and telbivudine 600 and 1800 mg/d for 7 days. Intensive time-matched electrocardiogram measurements and pharmacokinetic sampling were performed at baseline and on day 7 over 24 hours. For telbivudine and moxifloxacin, time-matched, placebo-adjusted change from baseline in QT was calculated and corrected using Fridericia's formula (QTcF). While moxifloxacin produced the expected significant changes in QTcF, none of the changes in QTcF for either doses of telbivudine exceeded 5 ms, and none of the associated upper 1-sided 95% confidence intervals (CI) exceeded the limit of 10 ms. There was no increase in QTcF with increasing plasma telbivudine. The supratherapeutic dose of telbivudine was well tolerated with a safety profile similar to the clinical dose despite a 3-fold increase in plasma exposure. This study therefore met the criteria for a negative thorough QT study. Telbivudine had no adverse effect on cardiac repolarization in healthy participants, even at supratherapeutic exposure, suggesting a broad safety margin.
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Affiliation(s)
- Fred Poordad
- Cedars-Sinai Medical Center, Los Angeles, California, USA
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Osborn MK. Safety and efficacy of telbivudine for the treatment of chronic hepatitis B. Ther Clin Risk Manag 2009; 5:789-98. [PMID: 19851526 PMCID: PMC2762437 DOI: 10.2147/tcrm.s5318] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Telbivudine was recently approved for the treatment of chronic hepatitis B. Phase III studies indicated its antiviral potency with 6- to 6.5-log copies/mL reductions in hepatitis B DNA levels at year 1, comparable to other potent agents such as entecavir or tenofovir. Genotypic resistance rates, however, reached 25% at year 2 in hepatitis B e-antigen positive subjects and 11% in hepatitis B e-antigen negative subjects, preventing it from becoming a preferred first-line drug for hepatitis B. Furthermore, its signature resistance mutation (a change from methionine to isoleucine at position 204 in the reverse transcriptase domain of the hepatitis B polymerase) also confers cross-resistance to entecavir, lamivudine, and emtricitabine. Telbivudine is well tolerated, with elevations in creatine phosphokinase being the most common abnormality observed in clinical trials. Most often, elevations were asymptomatic. Future research in hepatitis B will focus on the best ways to use existing therapies, including telbivudine, sequentially or in combination in order to maximize viral suppression and minimize the development of antiviral resistance.
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Affiliation(s)
- Melissa K Osborn
- Department of Medicine, Emory, University School of Medicine, Atlanta, GA, USA
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Zhou XJ, Ke J, Sallas WM, Farrell C, Mayers DL, Pentikis HS. Population pharmacokinetics of telbivudine and determination of dose adjustment for patients with renal impairment. J Clin Pharmacol 2009; 49:725-34. [PMID: 19395586 DOI: 10.1177/0091270009333555] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Telbivudine is a new nucleoside analog indicated for the treatment of chronic hepatitis B infection. A population pharmacokinetic model was developed based on data pooled from 16 early phase studies in 363 healthy participants and patients. Telbivudine was administered as single and/or multiple doses of 25 to 1800 mg daily for up to 28 days. A 2-compartment model with first-order input and lag time provided the best fit to the data. A final model was built with identified covariates, including creatinine clearance on plasma clearance, dose and race on bioavailability fraction, and body weight on central volume of distribution. The final model was applied to simulate steady-state exposure for patients with impaired renal function for various dosing regimens. Results from these simulation analyses support that in patients with moderate to severe renal impairment or end-stage renal disease, reduced daily doses of telbivudine could be an alternative to interval adjustment to achieve exposure comparable to patients with normal renal function or mild renal impairment treated with the full clinical dose.
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Affiliation(s)
- Xiao-Jian Zhou
- Idenix Pharmaceuticals, Inc, One Kendall Square, Building 1400, Cambridge, MA 02139, USA.
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Abstract
INTRODUCTION The treatment of chronic hepatitis B virus (HBV) infection has been revolutionized in the past decade by the increased availability of effective antiviral agents. Telbivudine is an L-nucleoside that is structurally related to lamivudine and has recently been approved for use in patients with chronic HBV infection. Telbivudine is highly selective for HBV DNA and inhibits viral DNA synthesis with no effect on human DNA or other viruses. This article reviews the pharmacology, pharmacokinetics, therapeutic efficacy and safety of telbivudine, and discusses its place in the current armamentarium against HBV. METHODS Relevant publications were identified from searches of Medline and PubMed between 2000 and 2008, using the search terms "hepatitis B/HBV," "telbivudine/LdT," "beta-L-thymidine," "pharmacokinetics," "safety," "adverse events," and "resistance." The reference lists of retrieved articles were searched for relevant studies. RESULTS Phase 3 clinical studies demonstrate that telbivudine is superior to lamivudine over a 2-year period in hepatitis B e-antigen (HBeAg)-positive and HBeAg-negative patients. Telbivudine was associated with a statistically significantly greater reduction in HBV DNA, greater proportion of alanine aminotransferase normalization, and greater histological response than lamivudine. Furthermore, telbivudine use resulted in fewer cases of treatment failure and less virological resistance than lamivudine. However, after 2 years of therapy, telbivudine resistance was appreciable (25%) and considerably higher than that seen with other new antivirals such as tenofovir and entecavir. Overall, telbivudine was found to be safe, although grade 3 or 4 adverse events, including elevations in creatine kinase, were more commonly found in patients receiving telbivudine than lamivudine. Telbivudine is not active against lamivudine-resistant HBV. CONCLUSIONS Telbivudine is a new antiviral agent joining the armamentarium against HBV. It is superior to lamivudine in terms of therapeutic response and resistance profile. However, concerns about resistance with long-term use, along with inferior cost-effective analyses, have relegated telbivudine to a second-line agent in the management of chronic HBV infection.
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Tsunoda SM, Hassanein T. Telbivudine for the treatment of hepatitis B disease. Future Virol 2008. [DOI: 10.2217/17460794.3.6.517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chronic hepatitis B affects approximately 350 million individuals worldwide leading to approximately 500,000 deaths annually. Current therapy includes immune modulators such as IFN-α and the oral antiviral agents, nucleoside analogs such as lamivudine and entecavir, and nucleotide analogs such as adefovir and tenofovir. Recently, telbivudine was approved in the USA for treatment of HBV disease. It is a synthetic nucleoside analog of thymidine that requires phosphorylation to convert to the active triphosphate form. Telbivudine is rapidly absorbed with a long half-life allowing for once-daily dosing. Clinical trials have demonstrated superior antiviral efficacy compared with lamivudine. Telbivudine has shown good correlations between antiviral efficacy at 24 weeks and a favorable outcome at 2 years. Telbivudine is well-tolerated, although monitoring for myopathies is recommended. Telbivudine resistance rates were lower compared with lamivudine. Telbivudine is an option for monotherapy in naive patients or for use in combination therapy in the treatment of chronic hepatitis B.
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Affiliation(s)
- Shirley M Tsunoda
- UCSD Skaggs School of Pharmacy & Pharmaceutical Sciences, 9500 Gilman Drive, #0714, La Jolla, CA 92093-0714, USA
| | - Tarek Hassanein
- UCSD School of Medicine, 200 West Arbor Drive, #8707, San Diego, CA 92103-8707, USA
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Lui YYN, Chan HLY. A review of telbivudine for the management of chronic hepatitis B virus infection. Expert Opin Drug Metab Toxicol 2008; 4:1351-61. [DOI: 10.1517/17425255.4.10.1351] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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