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Study Comparing the Safety of Switching From Lamivudine to Adefovir Dipivoxil Versus Overlapping Lamivudine and Adefovir Before Adefovir Dipivoxil Monotherapy in Patients With Chronic Hepatitis B

5 november 2021 uppdaterad av: Thomas Jefferson University

A Single Center Open-Label, Randomized Study Comparing the Safety of Immediately Switching From Lamivudine to Adefovir Dipivoxil Versus Overlapping Lamivudine and Adefovir for 12 Weeks Before Instituting Adefovir Dipivoxil Monotherapy in Patients With Chronic Hepatitis B

In earlier clinical studies, when patients who have been on lamivudine (LAM) were switched to adefovir dipivoxil (ADV), some patients developed ALT flares with an elevation of ALT > 10 x the upper limits of normal (ULN).

There were no cases of hepatic decompensation with the flares, however. The transition methods were varied among physicians from no overlapping to overlapping for 1 to 3 months with LAM and ADV. There is still some uncertainty about the optimal approach to switching from LAM to ADV.

This study will compare the safety of directly switching to ADV to a protocolled switch after a period of overlap of 12 weeks. This will facilitate pro-active switching in patients on LAM and will also highlight genotypic resistance ahead of phenotypic resistance as a reason to switch patients. Data to date have only been presented as part of a controlled study in patients with clinically evident LAM-resistance. This study will enroll patients who still have serum hepatitis B virus (HBV) DNA suppression whilst receiving LAM.

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Chronic HBV infection is an important worldwide cause of morbidity, mortality and source of potential new infections. There are an estimated 350 million carriers of HBV in the world. In China, Southeast Asia and sub-Saharan Africa, as many as 10-15% of the population are chronically infected. In North America and Northern Europe, infection and carrier rates are much lower, usually below 1%. Intermediate carrier rates of 1-5% are found in Southern Europe (e.g., Italy, Greece and Spain), parts of South and Central America, the Middle East and Japan. Persistent infection develops in over 90% of perinatally infected children and in 3-10% of people who become infected after the age of 6 years. Worldwide, it has been estimated that more than one million people die annually due to HBV-related end stage diseases such as cirrhosis and hepatocellular carcinoma.

The goal of antiviral therapy for hepatitis B is to reduce a patient's risks for progressive liver disease through prolonged suppression or eradication of HBV infection and to arrest or ameliorate HBV-related liver damage.

Studietyp

Interventionell

Inskrivning (Faktisk)

40

Fas

  • Fas 4

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år och äldre (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  • Males and females ≥ 18 years of age with chronic hepatitis B
  • Hepatitis B surface antigen (HBsAg)(+) for a minimum of 6 months prior to entry
  • Hepatitis B envelope antigen (HBeAg)(+) or (-) at baseline
  • Patients having previously received LAM for at least 24 weeks
  • Patients with compensated liver function (Child-Pugh score ≤ 6)

Exclusion Criteria:

  • Any serious or active medical or psychiatric illness which, in the opinion of the investigator, would interfere with patient treatment, assessment or compliance with the protocol.
  • Received immunoglobulins, interferon or other immune or cytokine-based therapies with possible activity in hepatitis B disease within 6 months prior to study screening.
  • Organ or bone marrow transplant recipients.
  • Evidence of active liver disease due to other causes (e.g., Wilson's disease, hemochromatosis, autoimmune hepatitis, hepatitis C or hepatitis D co-infection)
  • Patients taking parenteral (intravenous or intramuscular or subcutaneous) or oral steroids, immuno-suppressant therapies or chemotherapeutic agents within 2 months of study screening or expected to receive these agents during the course of the study.
  • Previous participation in an investigational trial involving administration of any investigational compound within 2 months prior to the study screening or those who received anti-HBV therapy other than lamivudine within the previous 3 months (e.g. anabolic steroids, ketaconazole, itraconazole, isoniazid, rifampin, rifabutin, simvastatin, lovastatin)
  • Clinically relevant alcohol or drug use or history of alcohol or drug use considered by the investigator to be sufficient to hinder compliance with treatment, follow up procedures or evaluation of adverse events
  • Lactating females or females with a positive serum pregnancy test.
  • Females of childbearing potential (post-puberty) unwilling or unable to have pregnancy testing at any study visit
  • Therapy with nephrotoxic drugs (e.g. aminoglycosides, amphotericin B, vancomycin, cidofovir, foscarnet, cisplatin pentamidine, tacrolimus, cyclosporine) or competitors of renal excretion (e.g. probenecid) within 2 months prior to study screening or the expectation that subject will receive these during the course of the study.
  • The use of antiviral therapy with agents demonstrating potential anti-HBV activity other than lamivudine within the previous 3 months (e.g. famciclovir, lobucavir, emtricitabine, DAPD, L-FMAU, entecavir, ganciclovir or others).
  • History of hypersensitivity to nucleoside and/or nucleotide analogues.
  • Clinical, ultrasonographic or radiologic evidence of hepatic mass suggestive of hepatocellular carcinoma.
  • Serum alphafetoprotein (AFP) > 50 ng/mL at the first screening visit. However, if the AFP level is > 50 ng/mL at the first screening visit, but has remained stable or decreased over the 6 months preceding the first screening visit, and if there is no radiologic or ultrasonic evidence of hepatic mass(es) suggestive of hepatocellular carcinoma, the patient will be allowed to enroll.
  • Inability to comply with study requirements.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Aktiv komparator: Direct switch to Adefovir Dipivoxil from Lamivudine
Aktiv komparator: Overlapping Lamivudine and Adefovir Dipivoxil for 3 months followed by ADV monotherapy

Vad mäter studien?

Primära resultatmått

Resultatmått
Tidsram
Observe the proportion of patients with ALT elevations (> 10 x ULN) at any time over the course of the switch
Tidsram: baseline, 3, 6, 9, and 12 months
baseline, 3, 6, 9, and 12 months
Study serum HBV DNA levels over time
Tidsram: baseline, 3, 6, 9, and 12 months
baseline, 3, 6, 9, and 12 months
Study serum ALT levels over time
Tidsram: baseline, 3, 6, 9, and 12 months
baseline, 3, 6, 9, and 12 months
Study the proportion of patients with YMDD variants at entry
Tidsram: baseline, 3, 6, 9, and 12 months
baseline, 3, 6, 9, and 12 months
Study the safety during the switching period
Tidsram: baseline, 3, 6, 9, and 12 months
baseline, 3, 6, 9, and 12 months

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Utredare

  • Huvudutredare: Hie-Won Hann, M.D., Thomas Jefferson University

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

17 juni 2005

Primärt slutförande (Faktisk)

1 februari 2009

Avslutad studie (Faktisk)

5 februari 2009

Studieregistreringsdatum

Först inskickad

24 mars 2006

Först inskickad som uppfyllde QC-kriterierna

24 mars 2006

Första postat (Uppskatta)

27 mars 2006

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

12 november 2021

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

5 november 2021

Senast verifierad

1 november 2021

Mer information

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

Kliniska prövningar på Kronisk hepatit B

Kliniska prövningar på Adefovirdipivoxil

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Prenumerera