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Phase 1 Study To Evaluate Antiviral Activity Of Small Molecule Direct Antiviral Agent At Multiple Doses In Subjects With Chronically Infected Hepatitis C Virus.

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00671671
First Posted: May 5, 2008
Last Update Posted: January 14, 2014
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Pfizer
  Purpose
Phase 1 study in HVC (Hepatitis C Virus) infected subjects to determine pharmacokinetics, safety and efficacy in subjects with no or inadequate response to prior treatment.

Condition Intervention Phase
Hepatitis, Chronic Hepatitis C Virus Drug: Small Molecule Agent (PF-868554) Phase 1

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase 1, Non- Randomized, Open Label, Sequential Group, Multicenter Study To Evaluate The Antiviral Activity Of Multiple Doses Of A Small Molecule Direct Antiviral Agent In Chronically Infected Hepatitis C Subjects.

Resource links provided by NLM:


Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Change From Baseline in Plasma Log10 Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at Day 11 (Cohort A): Full Analysis Set [ Time Frame: Baseline, Day 11 ]
    Plasma HCV RNA levels were quantified using the Abbott RealTime HCV assay (lower limit of quantification [LLOQ] = 12 international unit per milliliter [IU/mL]). Baseline value calculated as an average of screening, Day 0 and Day 1 (0 hour) measurements. Change from baseline in plasma log10 HCV RNA was calculated for all participants after the last day of dosing (Day 11 for Cohort A).

  • Change From Baseline in Plasma Log10 Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at Day 11 (Cohort A): Modified Analysis Set [ Time Frame: Baseline, Day 11 ]
    Plasma HCV RNA levels were quantified using the Abbott RealTime HCV assay (LLOQ = 12 IU/mL). Baseline value calculated as an average of screening, Day 0 and Day 1 (0 hour) measurements. Change from baseline in plasma log10 HCV RNA was calculated for all participants after the last day of dosing (Day 11 for Cohort A).

  • Change From Baseline in Plasma Log10 Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at Day 4 (Cohort B): Full Analysis Set [ Time Frame: Baseline, Day 4 ]
    Plasma HCV RNA levels were quantified using the Abbott RealTime HCV assay (LLOQ = 12 IU/mL). Baseline value calculated as an average of screening, Day 0 and Day 1 (0 hour) measurements. Change from baseline in plasma log10 HCV RNA was calculated for all participants after the last day of dosing (Day 4 for Cohort B).

  • Change From Baseline in Plasma Log10 Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at Day 4 (Cohort B): Modified Analysis Set [ Time Frame: Baseline, Day 4 ]
    Plasma HCV RNA levels were quantified using the Abbott RealTime HCV assay (LLOQ = 12 IU/mL). Baseline value calculated as the average of screening, Day 0 and Day 1 (0 hour) measurements. Change from baseline in plasma log10 HCV RNA was calculated for all participants after the last day of dosing (Day 4 for Cohort B).

  • Change From Baseline in Plasma Log10 Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at Nadir: Full Analysis Set [ Time Frame: Baseline, Nadir (lowest HCV RNA level), assessed up to Day 11 for Cohort A and Day 4 for Cohort B ]
    Plasma HCV RNA levels were quantified using the Abbott RealTime HCV assay (LLOQ = 12 IU/mL). Change from baseline in plasma Log10 HCV RNA at nadir signified the maximum change observed during the study.

  • Change From Baseline in Plasma Log10 Hepatitis C Virus (HCV) Ribonucleic Acid (RNA) at Nadir: Modified Analysis Set [ Time Frame: Baseline, Nadir (lowest HCV RNA level), assessed up to Day 11 for Cohort A and Day 4 for Cohort B ]
    Plasma HCV RNA levels were quantified using the Abbott RealTime HCV assay (LLOQ = 12 IU/mL). Change from baseline in plasma Log10 HCV RNA at nadir signified the maximum change observed during the study.


Secondary Outcome Measures:
  • Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) [ Time Frame: Predose, 0.5, 1, 2, 6, 8, 12 hours (hrs) postdose on Day 1 for Cohort A and B, pre-evening dose, 0.5, 1, 2, 4, 6, 8, 12 hrs post-evening dose on Day 3 for Cohort B, predose, 0.5, 1, 2, 4, 8, 12 hrs postdose on Day 10 for Cohort A ]
    Area under the concentration curve from time 0 to end of dosing interval (AUCtau), where dosing interval was 12 hours. AUCtau was evaluated at first dose on Day 1 for Cohort A and B, and at last dose for Cohort A (Day 10) and Cohort B (Day 3).

  • Area Under the Curve From Time Zero to Last Quantifiable Concentration (AUClast) [ Time Frame: Predose, 0.5, 1, 2, 6, 8, 12, 14 hrs postdose on Day 1 for Cohort A, B, pre-morning dose, pre-evening dose, 0.5, 1, 2, 4, 6, 8, 12, 24, 48 hrs post-evening dose on Day 3 for Cohort B, predose,0.5, 1, 2, 4, 8, 12, 24, 48 hrs postdose on Day 10 for Cohort A ]
    Area under the serum concentration time-curve from zero to the last measured concentration (AUClast). AUClast was evaluated at first dose on Day 1 for Cohort A and B, and at last dose for Cohort A (Day 10) and Cohort B (Day 3).

  • Area Under the Curve From Time Zero to Extrapolated Infinite Time [AUC (0 - ∞)] [ Time Frame: Pre-morning dose, pre-evening dose, 0.5, 1, 2, 4, 6, 8, 12, 24, 48 hrs post-evening dose on Day 3 for Cohort B, predose,0.5, 1, 2, 4, 8, 12, 24, 48 hrs postdose on Day 10 for Cohort A ]
    AUC (0 - ∞) = Area under the plasma concentration versus time curve (AUC) from time zero (pre-dose) to extrapolated infinite time (0 - ∞). It is obtained from AUC (0 - t) plus AUC (t - ∞). AUC (0 - ∞) was evaluated at last dose for Cohort A (Day 10) and Cohort B (Day 3).

  • Plasma Concentration at The End of Dosing Interval (Ctau) [ Time Frame: Predose, 0.5, 1, 2, 6, 8, 12 hours (hrs) postdose on Day 1 for Cohort A and B, pre-evening dose, 0.5, 1, 2, 4, 6, 8, 12 hrs post-evening dose on Day 3 for Cohort B, predose, 0.5, 1, 2, 4, 8, 12 hrs postdose on Day 10 for Cohort A ]
    Ctau was evaluated at first dose on Day 1 for Cohort A and B, and at last dose for Cohort A (Day 10) and Cohort B (Day 3).

  • Maximum Observed Plasma Concentration (Cmax) [ Time Frame: Predose, 0.5, 1, 2, 6, 8, 12, 14 hrs postdose on Day 1 for Cohort A, B, pre-morning dose, pre-evening dose, 0.5, 1, 2, 4, 6, 8, 12, 24, 48 hrs post-evening dose on Day 3 for Cohort B, predose,0.5, 1, 2, 4, 8, 12, 24, 48 hrs postdose on Day 10 for Cohort A ]
    Cmax was evaluated at first dose on Day 1 for Cohort A and B, and at last dose for Cohort A (Day 10) and Cohort B (Day 3).

  • Time to Reach Maximum Observed Plasma Concentration (Tmax) [ Time Frame: Predose, 0.5, 1, 2, 6, 8, 12, 14 hrs postdose on Day 1 for Cohort A, B, pre-morning dose, pre-evening dose, 0.5, 1, 2, 4, 6, 8, 12, 24, 48 hrs post-evening dose on Day 3 for Cohort B, predose,0.5, 1, 2, 4, 8, 12, 24, 48 hrs postdose on Day 10 for Cohort A ]
    Tmax was evaluated at first dose on Day 1 for Cohort A and B, and at last dose for Cohort A (Day 10) and Cohort B (Day 3).

  • Plasma Decay Half-Life (t1/2) [ Time Frame: Pre-morning dose, pre-evening dose, 0.5, 1, 2, 4, 6, 8, 12, 24, 48 hrs post-evening dose on Day 3 for Cohort B, predose,0.5, 1, 2, 4, 8, 12, 24, 48 hrs postdose on Day 10 for Cohort A ]
    Plasma decay half-life is the time measured for the plasma concentration to decrease by one half. Half-life was evaluated at last dose for Cohort A (Day 10) and Cohort B (Day 3).


Enrollment: 20
Study Start Date: April 2008
Study Completion Date: December 2008
Primary Completion Date: December 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Cohort B Drug: Small Molecule Agent (PF-868554)
Study drug will be administered 700mg BID in the fed state for three days.
Experimental: Cohort A
Dose study drug in subjects who have previously failed to respond to interferon based therapies
Drug: Small Molecule Agent (PF-868554)
Study drug will be given 450mg BID for a duration of 10 days.

  Eligibility

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

HCV Positive With HCV RNA>100,000 iu/ml Genotype 1; COHORT A- non responders or partial

Exclusion Criteria:

HIV HBV co-infection Decompensated liver disease Liver disease due to causes other than HCV, AFP>200ng/ml

  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00671671


Locations
United States, Florida
Pfizer Investigational Site
Gainesville, Florida, United States, 32608
Sponsors and Collaborators
Pfizer
Investigators
Study Director: Pfizer CT.gov Call Center Pfizer
  More Information

Additional Information:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Pfizer
ClinicalTrials.gov Identifier: NCT00671671     History of Changes
Other Study ID Numbers: A8121006
First Submitted: April 25, 2008
First Posted: May 5, 2008
Results First Submitted: November 25, 2013
Results First Posted: January 14, 2014
Last Update Posted: January 14, 2014
Last Verified: November 2013

Additional relevant MeSH terms:
Hepatitis
Hepatitis A
Hepatitis C
Hepatitis, Chronic
Liver Diseases
Digestive System Diseases
Hepatitis, Viral, Human
Virus Diseases
Enterovirus Infections
Picornaviridae Infections
RNA Virus Infections
Flaviviridae Infections
Antiviral Agents
Anti-Infective Agents