Study to Evaluate the Pharmacokinetics of Tenofovir Alafenamide (TAF) in Adults With Normal Hepatic Function and Adults With Severe Hepatic Impairment

Sponsor
Gilead Sciences (Industry)
Overall Status
Completed
CT.gov ID
NCT02296853
Collaborator
(none)
20
5
2
3.8
4
1

Study Details

Study Description

Brief Summary

The primary objective of this study is to evaluate the single-dose pharmacokinetics of tenofovir alafenamide (TAF) and its metabolite tenofovir (TFV) in participants with normal hepatic function and in participants with severe hepatic impairment.

Condition or Disease Intervention/Treatment Phase
Phase 1

Study Design

Study Type:
Interventional
Actual Enrollment :
20 participants
Allocation:
Non-Randomized
Intervention Model:
Parallel Assignment
Masking:
None (Open Label)
Primary Purpose:
Treatment
Official Title:
A Phase 1, Open-Label, Parallel-Group, Single Dose Study to Evaluate the Pharmacokinetics of Tenofovir Alafenamide (TAF) in Subjects With Normal Hepatic Function and Subjects With Severe Hepatic Impairment
Actual Study Start Date :
Dec 22, 2014
Actual Primary Completion Date :
Apr 17, 2015
Actual Study Completion Date :
Apr 17, 2015

Arms and Interventions

Arm Intervention/Treatment
Experimental: Severe Hepatic Impairment Group

Participants with severe hepatic impairment will receive a single oral dose of TAF 25 mg on Day 1.

Drug: TAF
25 mg tablet administered orally

Active Comparator: Matched Normal Hepatic Function Group

Participants with normal hepatic function will receive a single oral dose of TAF 25 mg on Day 1.

Drug: TAF
25 mg tablet administered orally

Outcome Measures

Primary Outcome Measures

  1. Pharmacokinetic (PK) Parameter: AUCinf of Tenofovir Alafenamide (TAF), Its Metabolite Tenofovir (TFV) and Free (Unbound) TAF [Predose (≤5 minutes), 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 5, 8, 12, 24, 36, 48, 60, 72, 96, 120, and 144 hours postdose on Day 1]

    AUCinf is defined as the concentration of drug extrapolated to infinite time.

  2. PK Parameter: Cmax of TAF, Its Metabolite TFV and Free (Unbound) TAF [Predose (≤5 minutes), 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 5, 8, 12, 24, 36, 48, 60, 72, 96, 120, and 144 hours postdose on Day 1]

    Cmax is defined as the maximum concentration of drug.

  3. PK Parameter: AUClast of TAF, Its Metabolite TFV and Free (Unbound) TAF [Predose (≤5 minutes), 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 5, 8, 12, 24, 36, 48, 60, 72, 96, 120, and 144 hours postdose on Day 1]

    AUClast is defined as the concentration of drug from time zero to the last observable concentration.

Secondary Outcome Measures

  1. Percentage of Participants Experiencing Treatment-Emergent Adverse Events (TEAEs) [Day 1 plus 30 days]

    TEAEs are events that meet one of the following criteria: any AEs with onset date of on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug or any AEs leading to premature discontinuation of study drug.

  2. Percentage of Participants Experiencing Treatment Emergent Laboratory Abnormalities [Day 1 plus 30 days]

    Treatment-emergent laboratory abnormalities were defined as values that increase at least one toxicity grade from baseline. These were graded as Grade 1: mild, Grade 2: moderate, Grade 3: severe, Grade 4: life-threatening. The most severe graded abnormality from all tests was counted for each participant.

Eligibility Criteria

Criteria

Ages Eligible for Study:
18 Years to 70 Years
Sexes Eligible for Study:
All
Accepts Healthy Volunteers:
Yes
Key Inclusion Criteria:
  • Screening laboratory parameters within defined thresholds

  • Creatinine clearance must be ≥ 60 mL/min

Key Exclusion Criteria:
  • Females who are pregnant or nursing or males who have a pregnant partner

  • Infection with hepatitis B virus (HBV) or HIV

  • History of clinically significant illness (including psychiatric or cardiac) or any other medical disorder that may interfere with participant treatment and/or adherence to the protocol

NOTE: Other protocol defined Inclusion/ Exclusion criteria may apply.

Contacts and Locations

Locations

Site City State Country Postal Code
1 Miami Florida United States 33014
2 Orlando Florida United States 32809
3 San Antonio Texas United States 78215
4 Munich Germany D-81241
5 Gratton Auckland New Zealand 1142

Sponsors and Collaborators

  • Gilead Sciences

Investigators

  • Study Director: Gilead Study Director, Gilead Sciences

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.
Responsible Party:
Gilead Sciences
ClinicalTrials.gov Identifier:
NCT02296853
Other Study ID Numbers:
  • GS-US-320-1615
  • 2014-004426-18
First Posted:
Nov 20, 2014
Last Update Posted:
Dec 9, 2020
Last Verified:
Nov 1, 2020
Individual Participant Data (IPD) Sharing Statement:
Yes
Plan to Share IPD:
Yes
Studies a U.S. FDA-regulated Drug Product:
Yes
Studies a U.S. FDA-regulated Device Product:
No
Keywords provided by Gilead Sciences
Additional relevant MeSH terms:

Study Results

Participant Flow

Recruitment Details Participants were enrolled at study sites in Germany, New Zealand, and the United States. The first participant was screened on 22 December 2014. The last study visit occurred on 17 April 2015.
Pre-assignment Detail 28 participants were screened.
Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of tenofovir alafenamide (TAF) 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg on Day 1.
Period Title: Overall Study
STARTED 10 10
COMPLETED 10 10
NOT COMPLETED 0 0

Baseline Characteristics

Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group Total
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of TAF 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg on Day 1. Total of all reporting groups
Overall Participants 10 10 20
Age (years) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [years]
57
(7.3)
55
(9.3)
56
(8.2)
Sex: Female, Male (Count of Participants)
Female
5
50%
5
50%
10
50%
Male
5
50%
5
50%
10
50%
Ethnicity (NIH/OMB) (Count of Participants)
Hispanic or Latino
3
30%
4
40%
7
35%
Not Hispanic or Latino
7
70%
6
60%
13
65%
Unknown or Not Reported
0
0%
0
0%
0
0%
Race (NIH/OMB) (Count of Participants)
American Indian or Alaska Native
0
0%
0
0%
0
0%
Asian
0
0%
0
0%
0
0%
Native Hawaiian or Other Pacific Islander
0
0%
0
0%
0
0%
Black or African American
0
0%
1
10%
1
5%
White
10
100%
9
90%
19
95%
More than one race
0
0%
0
0%
0
0%
Unknown or Not Reported
0
0%
0
0%
0
0%
Region of Enrollment (participants) [Number]
Germany
1
10%
3
30%
4
20%
New Zealand
2
20%
2
20%
4
20%
United States
7
70%
5
50%
12
60%

Outcome Measures

1. Primary Outcome
Title Pharmacokinetic (PK) Parameter: AUCinf of Tenofovir Alafenamide (TAF), Its Metabolite Tenofovir (TFV) and Free (Unbound) TAF
Description AUCinf is defined as the concentration of drug extrapolated to infinite time.
Time Frame Predose (≤5 minutes), 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 5, 8, 12, 24, 36, 48, 60, 72, 96, 120, and 144 hours postdose on Day 1

Outcome Measure Data

Analysis Population Description
Participants in the PK Analysis Set (consisted of all enrolled participants who received at least 1 dose of the study drug and had at least 1 non-missing PK concentration data for each respective analyte) with available data were analyzed.
Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of TAF 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg on Day 1.
Measure Participants 10 8
TAF
120.6
(33.96)
228.2
(85.30)
TFV
219.9
(118.70)
304.0
(72.45)
Free (unbound) TAF
42.8
(11.76)
46.5
(17.78)
Statistical Analysis 1
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments TAF: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 54.04
Confidence Interval (2-Sided) 90%
41.98 to 69.56
Parameter Dispersion Type:
Value:
Estimation Comments Here, GLSM is geometric least square mean.
Statistical Analysis 2
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments TFV: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 63.06
Confidence Interval (2-Sided) 90%
42.90 to 92.70
Parameter Dispersion Type:
Value:
Estimation Comments
Statistical Analysis 3
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments Free (unbound) TAF: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 94.42
Confidence Interval (2-Sided) 90%
72.48 to 122.99
Parameter Dispersion Type:
Value:
Estimation Comments
2. Primary Outcome
Title PK Parameter: Cmax of TAF, Its Metabolite TFV and Free (Unbound) TAF
Description Cmax is defined as the maximum concentration of drug.
Time Frame Predose (≤5 minutes), 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 5, 8, 12, 24, 36, 48, 60, 72, 96, 120, and 144 hours postdose on Day 1

Outcome Measure Data

Analysis Population Description
Participants in the PK Analysis Set were analyzed.
Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of TAF 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg on Day 1.
Measure Participants 10 10
TAF
79.6
(39.31)
176.0
(79.77)
TFV
7.5
(3.95)
7.6
(1.83)
Free (unbound) TAF
29.9
(17.36)
36.2
(18.38)
Statistical Analysis 1
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments TAF: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 45.10
Confidence Interval (2-Sided) 90%
31.66 to 64.25
Parameter Dispersion Type:
Value:
Estimation Comments
Statistical Analysis 2
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments TFV: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 89.88
Confidence Interval (2-Sided) 90%
64.77 to 124.72
Parameter Dispersion Type:
Value:
Estimation Comments
Statistical Analysis 3
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments Free (unbound) TAF: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 82.16
Confidence Interval (2-Sided) 90%
56.58 to 119.31
Parameter Dispersion Type:
Value:
Estimation Comments
3. Primary Outcome
Title PK Parameter: AUClast of TAF, Its Metabolite TFV and Free (Unbound) TAF
Description AUClast is defined as the concentration of drug from time zero to the last observable concentration.
Time Frame Predose (≤5 minutes), 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 4, 5, 8, 12, 24, 36, 48, 60, 72, 96, 120, and 144 hours postdose on Day 1

Outcome Measure Data

Analysis Population Description
Participants in the PK Analysis Set were analyzed.
Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of TAF 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg on Day 1.
Measure Participants 10 10
TAF
113.1
(30.85)
225.7
(85.09)
TFV
184.2
(99.86)
256.7
(59.91)
Free (unbound) TAF
41.7
(11.17)
46
(17.75)
Statistical Analysis 1
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments TAF: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 51.20
Confidence Interval (2-Sided) 90%
40.11 to 65.36
Parameter Dispersion Type:
Value:
Estimation Comments
Statistical Analysis 2
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments TFV: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 62.04
Confidence Interval (2-Sided) 90%
41.92 to 91.82
Parameter Dispersion Type:
Value:
Estimation Comments
Statistical Analysis 3
Statistical Analysis Overview Comparison Group Selection Severe Hepatic Impairment Group, Matched Normal Hepatic Function Group
Comments Free (unbound) TAF: Severe Hepatic Impairment Group vs. Matched Normal Hepatic Function Group
Type of Statistical Test Equivalence
Comments Sample size calculations were done in Query Advisor 6.0 by using the "Two-group t-test of equal means (equal n's)" module with α (one-sided) = 0.05, upper equivalence limit = ln(2.0) = 0.691, and expected difference = 0.
Statistical Test of Hypothesis p-Value
Comments
Method
Comments
Method of Estimation Estimation Parameter GLSM ratio percentage
Estimated Value 93.28
Confidence Interval (2-Sided) 90%
72.62 to 119.8
Parameter Dispersion Type:
Value:
Estimation Comments
4. Secondary Outcome
Title Percentage of Participants Experiencing Treatment-Emergent Adverse Events (TEAEs)
Description TEAEs are events that meet one of the following criteria: any AEs with onset date of on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug or any AEs leading to premature discontinuation of study drug.
Time Frame Day 1 plus 30 days

Outcome Measure Data

Analysis Population Description
The Safety Analysis Set included all enrolled participants who received at least 1 dose of study drug.
Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of TAF 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg on Day 1.
Measure Participants 10 10
Number [percentage of participants]
40.0
400%
30.0
300%
5. Secondary Outcome
Title Percentage of Participants Experiencing Treatment Emergent Laboratory Abnormalities
Description Treatment-emergent laboratory abnormalities were defined as values that increase at least one toxicity grade from baseline. These were graded as Grade 1: mild, Grade 2: moderate, Grade 3: severe, Grade 4: life-threatening. The most severe graded abnormality from all tests was counted for each participant.
Time Frame Day 1 plus 30 days

Outcome Measure Data

Analysis Population Description
Participants in the Safety Analysis Set were analyzed.
Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of TAF 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg on Day 1.
Measure Participants 10 10
Grade 1
40.0
400%
30.0
300%
Grade 2
40.0
400%
30.0
300%
Grade 3
20.0
200%
10.0
100%
Grade 4
0
0%
0
0%

Adverse Events

Time Frame Day 1 plus 30 days
Adverse Event Reporting Description The Safety Analysis Set included all enrolled participants who received at least 1 dose of study drug.
Arm/Group Title Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Arm/Group Description Participants with severe hepatic impairment received a single oral dose of TAF 25 mg on Day 1. Participants with normal hepatic function received a single oral dose of TAF 25 mg of on Day 1.
All Cause Mortality
Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total 0/10 (0%) 0/10 (0%)
Serious Adverse Events
Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total 1/10 (10%) 0/10 (0%)
Hepatobiliary disorders
Hepatic failure 1/10 (10%) 0/10 (0%)
Other (Not Including Serious) Adverse Events
Severe Hepatic Impairment Group Matched Normal Hepatic Function Group
Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total 4/10 (40%) 3/10 (30%)
Gastrointestinal disorders
Abdominal distension 1/10 (10%) 0/10 (0%)
Nausea 0/10 (0%) 2/10 (20%)
Vomiting 0/10 (0%) 1/10 (10%)
General disorders
Fatigue 0/10 (0%) 1/10 (10%)
Musculoskeletal and connective tissue disorders
Musculoskeletal chest pain 1/10 (10%) 0/10 (0%)
Nervous system disorders
Headache 1/10 (10%) 2/10 (20%)
Respiratory, thoracic and mediastinal disorders
Cough 1/10 (10%) 0/10 (0%)
Skin and subcutaneous tissue disorders
Pruritus 1/10 (10%) 0/10 (0%)

Limitations/Caveats

[Not Specified]

More Information

Certain Agreements

Principal Investigators are NOT employed by the organization sponsoring the study.

After conclusion of the study and without prior written approval from Gilead, investigators in this study may communicate, orally present, or publish in scientific journals or other media only after the following conditions have been met: The results of the study in their entirety have been publicly disclosed by or with the consent of Gilead in an abstract, manuscript, or presentation form; or The study has been completed at all study sites for at least 2 years

Results Point of Contact

Name/Title Gilead Clinical Study Information Center
Organization Gilead Sciences
Phone 1-833-445-3230 (GILEAD-0)
Email GileadClinicalTrials@gilead.com
Responsible Party:
Gilead Sciences
ClinicalTrials.gov Identifier:
NCT02296853
Other Study ID Numbers:
  • GS-US-320-1615
  • 2014-004426-18
First Posted:
Nov 20, 2014
Last Update Posted:
Dec 9, 2020
Last Verified:
Nov 1, 2020