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Antiviral Efficacy of Switching to ETV Plus TDF

30 januari 2014 uppdaterad av: Sang Hoon Ahn, Yonsei University

A Randomized, Multicenter, Prospective Study to Compare Antiviral Efficacy and Safety of Switching to ETV Plus TDF Versus Maintaining LAM/LDT Plus ADF Combination in CHC With PVR to LAM/LDF Plus ADF Combination Rescue Therapy for YMDD Mutation

Switching to Entecavir(ETV) plus Tenofovir Disoproxil Fumarate(TDF) combination will result in faster and greater antiviral activity and lower rates of resistance emergence over maintaining Lamivudine(LAM)/Telbivudine(LdT)+Adefovir(ADV) combination in partial responders to LAM/LdT+ADV rescue therapy.

Earlier switching to combination with the most potent regimen will be more effective to achieve virologic response(VR) and prevent further resistance emergence.

All subjects will orally take assigned drugs once daily for 48 weeks. All subjects will be assessed at baseline and every three months thereafter. Evaluations at each visit will include vital signs, physical examinations, laboratory tests, HBV DNA levels and adverse events. At baseline and every six months thereafter, serum will be assayed for HBV serology. Genotypic analysis will be performed at baseline and 48 weeks.

Studieöversikt

Status

Okänd

Betingelser

Intervention / Behandling

Detaljerad beskrivning

  1. As TDF has not been approved yet in Korea, current KASL practice guideline generally recommends to add ADV in LAM-resistant or LdT-resistant patients.
  2. However, several local literatures reported a substantial proportion of patients treated with LAM plus ADV combination therapy showed a persistently inadequate or partial virologic response('VR') and YMDDm still maintained in spite of under rescue combination therapy.
  3. Due to the unavailability of TDF in Korea, ETV plus ADV combination has being considered a better salvage therapy with non-overlapping cross-resistance profiles in pts who fail to LAM plus ADV rescue therapy and local report demonstrated that the rate of VR was significantly higher with ETV+ADV switching group than LAM+ADV continuation group in partial responder to LAM plus ADV combination rescue therapy for LAM resistance.
  4. Hence, more earlier combination therapy with the most potent Nucleoside and Nucleotide analogue would be a promising salvage treatment for previous NA treatment failures but comparative prospective trials are limited.
  5. Therefore, this study will investigate the greater effectiveness and safety of switching to the most potent combination versus maintaining LAM(or LdT) plus ADV and also compare the rate of VR based on the HBV DNA cut-off level at switching - more than and less than 20,000 IU/mL.

All subjects will orally take assigned drugs once daily for 48 weeks. All subjects will be assessed at baseline and every three months thereafter. Evaluations at each visit will include vital signs, physical examinations, laboratory tests, HBV DNA levels and adverse events. At baseline and every six months thereafter, serum will be assayed for HBV serology. Genotypic analysis will be performed at baseline and 48 weeks.

Studietyp

Interventionell

Inskrivning (Förväntat)

104

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

20 år och äldre (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  1. ≥ 20 years of age
  2. History of HBsAg positive for more than 6 months
  3. History of genotypic resistance to LAM or LdT (YMDDm)
  4. Partial responder (HBV DNA ≥ 60 IU/mL) currently receiving antiviral combination rescue therapy for at least 24 weeks of treatment with LAM+ADV or LdT+ADV
  5. Hepatitis B e Antigen(HBeAg)-positive and -negative
  6. Compensated liver disease (Child-Pugh A)
  7. Signed written informed consent after being instructed about the objective and procedure of the clinical study

Exclusion Criteria:

  1. History of genotypic resistance to ADV
  2. Most previous treatment of other than LAM+ADV and LdT+ADV
  3. Subjects with Alanine Aminotransferase(ALT) > 10xUpper Limit of normal(ULN)
  4. Co-infected with hepatitis C virus(HCV) or HIV
  5. Pregnant or lactating woman
  6. Subject who needs long-term administration of drugs including immunosuppressive agents, agents related to high risk in the hepatic/renal toxicity, agents influencing renal excretion
  7. History of liver transplantation or planned for liver transplantation
  8. Subject who was diagnosed malignant tumor and has been receiving chemotherapy
  9. Subject who has HCC history or who shows potential hepatocellular carcinoma (HCC) finding such as suspicious region in the radiologic exam(abdominal US or CT) or serum Alpha Feto Protein(AFP) elevation
  10. Renal Insufficiency (CLcr < 50ml/min based on Cockcroft-Gault equation considering weight, ages and serum creatinine)
  11. Subject who has a liver disease other than chronic hepatitis B (e.g. hemochromatosis, Wilson's disease, alcoholic liver disease, nonalcoholic fatty liver disease, alpha 1-antitrypsin deficiency etc.)
  12. Subject who has a history of hypersensitivity to study drug or its ingredients
  13. Subject who is involved in other clinical trial within 60 days prior to study entry
  14. Subject who the investigator deems inappropriate to participate in this study

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: Group A:
Maintaining LAM/LdT+ADV combination Lamivudine 100mg / Telbivudine 600mg +Adefovir 10mg
Läkemedel: Group A (Zeffix, Sebivo, Hepsera)
Maintaining LAM/LdT+ADV combination Lamivudine 100mg / Telbivudine 600mg +Adefovir 10mg
Andra namn:
  • Hepsera
  • Sebivo
  • Zeffix
Experimentell: Group B
Switching to ETV plus TDF combination Entecavir 1.0mg + Tenofovir 300mg
Läkemedel: Group B (Baraclude, Viread)
Switching to ETV plus TDF combination Entecavir 1.0mg + Tenofovir 300mg
Andra namn:
  • Viread
  • Baraclude

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
The proportion of subjects who achieve virologic response(HBV DNA < 60 IU/mL, approximately 300 copies/mL) by real-time PCR at Week 48
Tidsram: at Week 48
To compare the proportion of subjects who achieve virologic response(HBV DNA < 60 IU/mL, approximately 300 copies/mL) in switching group(Entecavir plus Tenofovir) with that in maintaining group(Lamivudine/Telbivudine plus Adefovir) by real-time Polymerase chain reaction(PCR) at Week 48
at Week 48

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Virologic efficacy
Tidsram: Week 12, 24, 36, and 48
To compare virologic response in switching group(Entecavir plus Tenofovir) with those in maintaining group (Lamivudine/Telbivudine plus Adefovir) at Week 48
Week 12, 24, 36, and 48
serologic efficacy
Tidsram: Week 12, 24, 36, and 48
To compare serologic response in switching group(Entecavir plus Tenofovir) with those in maintaining group (Lamivudine/Telbivudine plus Adefovir) at Week 48
Week 12, 24, 36, and 48
biochemical efficacy
Tidsram: Week 12, 24, 36, and 48
To compare biochemical response in switching group(Entecavir plus Tenofovir) with those in maintaining group (Lamivudine/Telbivudine plus Adefovir) at Week 48
Week 12, 24, 36, and 48
Safety issue
Tidsram: Week 12, 24, 36, and 48
To compare safety issue in switching group(Entecavir plus Tenofovir) with those in maintaining group (Lamivudine/Telbivudine plus Adefovir) at Week 48 - severity of adverse event
Week 12, 24, 36, and 48

Samarbetspartners och utredare

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

Sponsor

Yonsei University

Samarbetspartners

Bristol-Myers Squibb
Chonbuk National University Hospital
Seoul St. Mary's Hospital
Pusan National University Hospital
Kyungpook National University Hospital
The Catholic University of Korea
Soonchunhyang University Hospital
Hallym University Medical Center

Utredare

  • Huvudutredare: Sang Hoon Ahn, MD, PhD, Yonsei University

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

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

1 augusti 2012

Primärt slutförande (Förväntat)

1 maj 2014

Avslutad studie (Förväntat)

1 maj 2014

Studieregistreringsdatum

Först inskickad

8 maj 2012

Först inskickad som uppfyllde QC-kriterierna

14 maj 2012

Första postat (Uppskatta)

15 maj 2012

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

31 januari 2014

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

30 januari 2014

Senast verifierad

1 januari 2014

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • AI463-274

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