Ignite Creation Date:
2025-12-25 @ 12:38 AM
Ignite Modification Date:
2026-03-14 @ 4:05 AM
Study NCT ID:
NCT00531167
Status:
COMPLETED
Last Update Posted:
2012-10-22
First Post:
2007-09-17
Is Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Adding Adefovir Dipivoxil Versus Switching to Entecavir in Patients With Lamivudine-resistant Chronic Hepatitis B
Sponsor:
Korea University
Organization:
Study Overview
Official Title:
Prospective Randomized Study for the Comparison of Adding Adefovir Dipivoxil and Switching to Entecavir in Patients With Lamivudine-resistant Chronic Hepatitis B
Status:
COMPLETED
Status Verified Date:
2012-10
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Antiviral resistance mutations limit the efficacy of therapy for chronic hepatitis B. At year 2, resistance to adefovir may occur as high as 25% in patients with history of lamivudine resistance. Resistance to entecavir is reported to be 10% in lamivudine refractory patients during the same period. However, combination of lamivudine and adefovir decreased the adefovir resistance rate as low as 0% in the recent studies. By overcoming the antiviral resistance, the efficacy of therapy will be maximized. This study is intended to compare the efficacy of two strategies, combination of lamivudine and adefovir vs. entecavir monotherapy in patients with lamivudine resistance.
Detailed Description:
Recently, published data showed combination of lamivudine and adefovir lead to PCR negativity (\<1000 copies/mL) up to 80% in the treatment of lamivudine-resistant chronic hepatitis B at year 2 \[Rapti et al. Hepatology 2007 Feb;45(2):307-13.\]. Other studies also showed 76% and 69% PCR negativity in mostly HBeAg negative subjects \[Lampertico et al. Hepatology 2006 Oct;44(4) Suppl 1:556A-557A, Lampertico et al. Hepatology 2006 Oct;44(4) Suppl 1:693A-694A\].
In the study for the treatment of lamivudine-resistant chronic hepatitis B patients which included HBeAg positive subjects more predominantly, entecavir monotherapy showed 34% of PCR negativity (\<300 copies/mL) at year 2 \[Tenney DJ, et al. Antimicrob Agents Chemother. 2007 Mar;51(3):902-11\].
Although it is assumed that combination of lamivudine and adefovir would be more effective than entecavir monotherapy for lamivudine resistant patients, we cannot verify the assumption, because there is no data directly comparing these two strategies until now.
The aim of this study is to determine the most effective therapy for the patients with lamivudine resistant chronic hepatitis B. We will compare the PCR negativity (\<60 IU/ml) of HBV DNA at year 2 in patients receiving 'the combination of lamivudine and adefovir' and 'entecavir monotherapy'.
Since we are planning to include lamivudine-resistant chronic hepatitis B patients regardless of HBeAg status, we assumed the PCR negativity (\<300 copies/mL or \<60 IU/mL) in adefovir-lamivudine combination and entecavir monotherapy group as 55% and 34%, respectively, considering HBeAg status and lower detection limit of PCR.
The result of this study will be able to clearly demonstrate the superiority of combination therapy with lamivudine and adefovir to entecavir monotherapy, which provide us the guide to rescue therapy for patients with lamivudine resistant HBV.
In the study for the treatment of lamivudine-resistant chronic hepatitis B patients which included HBeAg positive subjects more predominantly, entecavir monotherapy showed 34% of PCR negativity (\<300 copies/mL) at year 2 \[Tenney DJ, et al. Antimicrob Agents Chemother. 2007 Mar;51(3):902-11\].
Although it is assumed that combination of lamivudine and adefovir would be more effective than entecavir monotherapy for lamivudine resistant patients, we cannot verify the assumption, because there is no data directly comparing these two strategies until now.
The aim of this study is to determine the most effective therapy for the patients with lamivudine resistant chronic hepatitis B. We will compare the PCR negativity (\<60 IU/ml) of HBV DNA at year 2 in patients receiving 'the combination of lamivudine and adefovir' and 'entecavir monotherapy'.
Since we are planning to include lamivudine-resistant chronic hepatitis B patients regardless of HBeAg status, we assumed the PCR negativity (\<300 copies/mL or \<60 IU/mL) in adefovir-lamivudine combination and entecavir monotherapy group as 55% and 34%, respectively, considering HBeAg status and lower detection limit of PCR.
The result of this study will be able to clearly demonstrate the superiority of combination therapy with lamivudine and adefovir to entecavir monotherapy, which provide us the guide to rescue therapy for patients with lamivudine resistant HBV.
Study Oversight
Has Oversight DMC:
True
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?: