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Study to Assess the Effect of Sodium Zirconium Cyclosilicate on the Pharmacokinetics of Tacrolimus and Cyclosporin in Healthy Subjects

A Two-Cohort, Randomised Sequence, Cross-over, Open-label Study to Assess the Effect of a Single Dose of Sodium Zirconium Cyclosilicate (SZC) on the Pharmacokinetics of Tacrolimus and Cyclosporin in Healthy Subjects

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04788641
Enrollment
62
Registered
2021-03-09
Start date
2021-03-30
Completion date
2021-09-16
Last updated
2024-04-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Hyperkalaemia

Keywords

Pharmacokinetics, Sodium Zirconium Cyclosilicate, Tacrolimus, Cyclosporin, Drug-drug interaction study

Brief summary

This study will be an open-label, randomised sequence, 2-period, 2-cohort, 2-treatment in each cohort, cross-over study in healthy subjects (males and females of non-childbearing potential), performed at a single study centre.

Detailed description

The study will comprise: * A screening period of maximum 28 days; * Two treatment periods: * Treatment Period 1 starts with admission to the Clinical Unit on Day -1, followed by dosing on Day 1 with the assigned treatment (A, B, C, or D) as per assigned cohort and treatment sequence, followed by a washout period of at least 14 days. * Treatment Period 2 starts with admission to Clinical Unit on Day -1, followed by dosing on Day 1 with cross-over treatment as per assigned cohort, followed by a follow-up period of 7 to 10 days. * A follow-up visit/early termination visit at 7 to 10 days after the last investigation medicinal product (IMP) administration. Subjects will be assigned to either Cohort 1 (tacrolimus) or to Cohort 2 (cyclosporin). Each cohort will have 2 treatment periods. Subjects in each cohort will be randomly assigned to one of 2 treatment sequences (AB\|BA or CD\|DC) where, * Treatment A: Tacrolimus * Treatment B: Tacrolimus + SZC * Treatment C: Cyclosporin * Treatment D: Cyclosporin + SZC

Interventions

DRUGTacrolimus

Each subject in this cohort will receive a single dose of oral capsules of tacrolimus on 2 occasions, once alone and once in combination with oral suspension of SZC. Drug administrations will occur after a 12 hour overnight fast.

Each subject will receive a single dose of oral capsules of cyclosporin on 2 occasions, once alone and once in combination with oral suspension of SZC. Drug administrations will occur after a 12 hour overnight fast.

Each subject will receive single oral doses of SZC with tacrolimus (cohort 1) or cyclosporin (cohort 2) under fasted conditions. The doses will be administered after an overnight fast of at least 12 hours.

Sponsors

Parexel
CollaboratorINDUSTRY
AstraZeneca
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 50 Years
Healthy volunteers
Yes

Inclusion criteria

• Healthy male and female subjects aged 18 to 50 years (both inclusive)

Exclusion criteria

* History of any clinically significant disease or disorder which, in the opinion of the Investigator, may either put the volunteer at risk because of participation in the study, or influence the results or the volunteer's ability to participate in the study. * History or presence of gastrointestinal, hepatic or renal disease, or any other condition known to interfere with absorption, distribution, metabolism, or excretion of drugs. * Any clinically important abnormalities in rhythm, conduction or morphology of the 12-lead safety electrocardiogram (ECG), at screening visit and/or admission to the Clinical Unit. * Has received another new chemical entity (defined as a compound which has not been approved for marketing) within 3 months of the first administration of IMP in this study. * History of severe allergy/hypersensitivity or ongoing allergy/hypersensitivity, as judged by the Investigator or history of hypersensitivity to drugs with a similar chemical structure or class to SZC, tacrolimus, or cyclosporin. * Subjects who have previously received SZC.

Design outcomes

Primary

MeasureTime frameDescription
Maximum Observed Concentration (Cmax)Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporinEffect of co-administered SZC on the Cmax of tacrolimus and cyclosporin in healthy participants was determined.
Area Under Concentration-time Curve From Time Zero to Infinity (AUCinf)Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporinEffect of co-administered SZC on the AUCinf of tacrolimus and cyclosporin in healthy participants was determined.

Secondary

MeasureTime frameDescription
Area Under the Concentration-time Curve From Time Zero to Time of Last Quantifiable Concentration (AUClast)Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporinEffect of co-administered SZC on the AUClast of tacrolimus and cyclosporin in healthy participants was determined.
Time to Reach Maximum Observed Concentration Following Drug Administration (Tmax)Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporinEffect of co-administered SZC on the tmax of tacrolimus and cyclosporin in healthy participants was determined.
Half-life Associated With Terminal Slope (λz) of a Semi-logarithmic Concentration-time Curve (t½λz)Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporinEffect of co-administered SZC on the t½λz of tacrolimus and cyclosporin in healthy participants was determined.
Number of Participants With Adverse Events (AEs) and Serious AEsFrom the time of IMP administration (Day 1) to Follow-up/Early Termination Visit (7-10 days after last IMP administration) [up to 4 weeks]Safety and tolerability of co-administration of SZC and tacrolimus/cyclosporin as compared to tacrolimus/cyclosporin alone was assessed.

Countries

Germany

Participant flow

Recruitment details

The study was conducted at a single study centre (Berlin, Germany) between 30 March 2021 to 16 September 2021.

Pre-assignment details

Participants who met all the inclusion and none of the exclusion criteria were randomized at single center. The screening period was from Day -28 to Day -2. All participants signed and dated the Informed consent form before any study procedures were performed. All the study assessments were performed as per the schedule of assessment.

Participants by arm

ArmCount
Cohort 1 (Tacrolimus): Treatment A, Then Treatment B
Participants received a single dose of oral capsules of Tacrolimus on 2 occasions once alone (Treatment A: Tacrolimus) in Treatment Period 1 on Day 1 and once in combination with oral suspension of SZC (Treatment B: Tacrolimus+ SZC) in Treatment Period 2 on Day 1 separated by at least 14 days. Participants had a follow-up period of 7 to 10 days.
16
Cohort 1 (Tacrolimus): Treatment B, Then Treatment A
Participants received a single dose of oral capsules of Tacrolimus on 2 occasions once in combination with oral suspension of SZC (Treatment B: Tacrolimus + SZC) in Treatment Period 2 on Day 1 and once alone (Treatment A: Tacrolimus) in Treatment Period 1 on Day 1 and separated by at least 14 days. Participants had a follow-up period of 7 to 10 days.
15
Cohort 2 (Cyclosporin): Treatment C, Then Treatment D
Participants received a single dose of oral capsules of Cyclosporin on 2 occasions once alone (Treatment C: Cyclosporin) in Treatment Period 1 on Day 1 and once in combination with oral suspension of SZC (Treatment D: Cyclosporin + SZC) in Treatment Period 2 on Day 1 separated by at least 14 days. Participants had a follow-up period of 7 to 10 days.
16
Cohort 2 (Cyclosporin): Treatment D, Then Treatment C
Participants received a single dose of oral capsules of Cyclosporin on 2 occasions once in combination with oral suspension of SZC (Treatment D: Cyclosporin + SZC) in Treatment Period 2 on Day 1 and once alone (Treatment C: Cyclosporin) in Treatment Period 1 on Day 1 and separated by at least 14 days. Participants had a follow-up period of 7 to 10 days.
15
Total62

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Treatment Period 2 (4 Days)Adverse Event0010
Treatment Period 2 (4 Days)Participant decided to discontinue further participation1000
Treatment Period 2 (4 Days)Protocol Violation0010

Baseline characteristics

CharacteristicCohort 1 (Tacrolimus): Treatment A, Then Treatment BCohort 1 (Tacrolimus): Treatment B, Then Treatment ATotalCohort 2 (Cyclosporin): Treatment C, Then Treatment DCohort 2 (Cyclosporin): Treatment D, Then Treatment C
Age, Continuous
Cohort 1 (Tacrolimus)
38.3 years
STANDARD_DEVIATION 8.9
37.1 years
STANDARD_DEVIATION 9.6
37.7 years
STANDARD_DEVIATION 9.1
Age, Continuous
Cohort 2 (Cyclosporin)
32.1 years
STANDARD_DEVIATION 8.6
33.2 years
STANDARD_DEVIATION 9
30.9 years
STANDARD_DEVIATION 8.3
Age, Customized
18 - 50 years
16 Participants15 Participants62 Participants16 Participants15 Participants
Age, Customized
51 years and older
0 Participants0 Participants0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
American Indian or Alaska Native
0 Participants0 Participants1 Participants1 Participants0 Participants
Race/Ethnicity, Customized
Asian
1 Participants0 Participants3 Participants1 Participants1 Participants
Race/Ethnicity, Customized
Black or African American
0 Participants0 Participants2 Participants2 Participants0 Participants
Race/Ethnicity, Customized
Hispanic or Latino
0 Participants0 Participants1 Participants1 Participants0 Participants
Race/Ethnicity, Customized
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Not Hispanic or Latino
16 Participants15 Participants61 Participants15 Participants15 Participants
Race/Ethnicity, Customized
Other
1 Participants0 Participants2 Participants0 Participants1 Participants
Race/Ethnicity, Customized
White
14 Participants15 Participants54 Participants12 Participants13 Participants
Sex: Female, Male
Female
1 Participants2 Participants3 Participants0 Participants0 Participants
Sex: Female, Male
Male
15 Participants13 Participants59 Participants16 Participants15 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 310 / 300 / 310 / 29
other
Total, other adverse events
7 / 3113 / 308 / 317 / 29
serious
Total, serious adverse events
0 / 310 / 300 / 310 / 29

Outcome results

Primary

Area Under Concentration-time Curve From Time Zero to Infinity (AUCinf)

Effect of co-administered SZC on the AUCinf of tacrolimus and cyclosporin in healthy participants was determined.

Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporin

Population: The PK analysis set consisted of all participants in the safety analysis set and who had at least 1 quantifiable whole blood concentration post-dose for tacrolimus (Cohort 1) or for cyclosporin (Cohort 2) and who had no major protocol deviations thought to impact on the analysis of the PK data.~Here, overall number of participants analyzed are the participants with available data that were analyzed for the outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Treatment A: Tacrolimus (5 mg)Area Under Concentration-time Curve From Time Zero to Infinity (AUCinf)267900 Picogram.hour/milliliterGeometric Coefficient of Variation 50.2
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Area Under Concentration-time Curve From Time Zero to Infinity (AUCinf)171700 Picogram.hour/milliliterGeometric Coefficient of Variation 48.95
Treatment C: Cyclosporin (100 mg)Area Under Concentration-time Curve From Time Zero to Infinity (AUCinf)1884 Picogram.hour/milliliterGeometric Coefficient of Variation 25.9
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Area Under Concentration-time Curve From Time Zero to Infinity (AUCinf)1810 Picogram.hour/milliliterGeometric Coefficient of Variation 23.91
Comparison: Tacrolimus90% CI: [55.64, 71.13]
Comparison: Cyclosporin90% CI: [92.93, 101.7]
Primary

Maximum Observed Concentration (Cmax)

Effect of co-administered SZC on the Cmax of tacrolimus and cyclosporin in healthy participants was determined.

Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporin

Population: The PK analysis set consisted of all participants in the safety analysis set and who had at least 1 quantifiable whole blood concentration post-dose for tacrolimus (Cohort 1) or for cyclosporin (Cohort 2) and who had no major protocol deviations thought to impact on the analysis of the PK data.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Treatment A: Tacrolimus (5 mg)Maximum Observed Concentration (Cmax)27140 Picogram/milliliter (pg/ml)Geometric Coefficient of Variation 37.61
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Maximum Observed Concentration (Cmax)19350 Picogram/milliliter (pg/ml)Geometric Coefficient of Variation 35.88
Treatment C: Cyclosporin (100 mg)Maximum Observed Concentration (Cmax)593.6 Picogram/milliliter (pg/ml)Geometric Coefficient of Variation 19.54
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Maximum Observed Concentration (Cmax)608.1 Picogram/milliliter (pg/ml)Geometric Coefficient of Variation 25.28
Comparison: Tacrolimus90% CI: [65.44, 77.24]
Comparison: Cyclosporin90% CI: [96.11, 110.1]
Secondary

Area Under the Concentration-time Curve From Time Zero to Time of Last Quantifiable Concentration (AUClast)

Effect of co-administered SZC on the AUClast of tacrolimus and cyclosporin in healthy participants was determined.

Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporin

Population: The PK analysis set consisted of all participants in the safety analysis set and who had at least 1 quantifiable whole blood concentration post-dose for tacrolimus (Cohort 1) or for cyclosporin (Cohort 2) and who had no major protocol deviations thought to impact on the analysis of the PK data.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Treatment A: Tacrolimus (5 mg)Area Under the Concentration-time Curve From Time Zero to Time of Last Quantifiable Concentration (AUClast)240800 Picogram.hour/milliliterGeometric Coefficient of Variation 50.79
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Area Under the Concentration-time Curve From Time Zero to Time of Last Quantifiable Concentration (AUClast)159000 Picogram.hour/milliliterGeometric Coefficient of Variation 51.13
Treatment C: Cyclosporin (100 mg)Area Under the Concentration-time Curve From Time Zero to Time of Last Quantifiable Concentration (AUClast)1792 Picogram.hour/milliliterGeometric Coefficient of Variation 26.46
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Area Under the Concentration-time Curve From Time Zero to Time of Last Quantifiable Concentration (AUClast)1718 Picogram.hour/milliliterGeometric Coefficient of Variation 24.39
Comparison: Tacrolimus90% CI: [58.69, 73.24]
Comparison: Cyclosporin90% CI: [92.7, 101.6]
Secondary

Half-life Associated With Terminal Slope (λz) of a Semi-logarithmic Concentration-time Curve (t½λz)

Effect of co-administered SZC on the t½λz of tacrolimus and cyclosporin in healthy participants was determined.

Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporin

Population: The PK analysis set consisted of all participants in the safety analysis set and who had at least 1 quantifiable whole blood concentration post-dose for tacrolimus (Cohort 1) or for cyclosporin (Cohort 2) and who had no major protocol deviations thought to impact on the analysis of the PK data.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Treatment A: Tacrolimus (5 mg)Half-life Associated With Terminal Slope (λz) of a Semi-logarithmic Concentration-time Curve (t½λz)33.59 hourGeometric Coefficient of Variation 18.72
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Half-life Associated With Terminal Slope (λz) of a Semi-logarithmic Concentration-time Curve (t½λz)33.31 hourGeometric Coefficient of Variation 22.27
Treatment C: Cyclosporin (100 mg)Half-life Associated With Terminal Slope (λz) of a Semi-logarithmic Concentration-time Curve (t½λz)9.223 hourGeometric Coefficient of Variation 32.78
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Half-life Associated With Terminal Slope (λz) of a Semi-logarithmic Concentration-time Curve (t½λz)8.647 hourGeometric Coefficient of Variation 31.12
Comparison: Tacrolimus90% CI: [94.62, 102.4]
Comparison: Cyclosporin90% CI: [85.74, 103.3]
Secondary

Number of Participants With Adverse Events (AEs) and Serious AEs

Safety and tolerability of co-administration of SZC and tacrolimus/cyclosporin as compared to tacrolimus/cyclosporin alone was assessed.

Time frame: From the time of IMP administration (Day 1) to Follow-up/Early Termination Visit (7-10 days after last IMP administration) [up to 4 weeks]

Population: All participants who received at least 1 dose of IMP were included in the safety analysis for the study.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Treatment A: Tacrolimus (5 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to discontinuation of IMP0 Participants
Treatment A: Tacrolimus (5 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE with outcome = death0 Participants
Treatment A: Tacrolimus (5 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to withdrawal from study0 Participants
Treatment A: Tacrolimus (5 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny SAE (including events with outcome = death)0 Participants
Treatment A: Tacrolimus (5 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE7 Participants
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny SAE (including events with outcome = death)0 Participants
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to discontinuation of IMP0 Participants
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to withdrawal from study0 Participants
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE with outcome = death0 Participants
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE13 Participants
Treatment C: Cyclosporin (100 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny SAE (including events with outcome = death)0 Participants
Treatment C: Cyclosporin (100 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE8 Participants
Treatment C: Cyclosporin (100 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE with outcome = death0 Participants
Treatment C: Cyclosporin (100 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to discontinuation of IMP1 Participants
Treatment C: Cyclosporin (100 mg)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to withdrawal from study1 Participants
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to discontinuation of IMP0 Participants
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE with outcome = death0 Participants
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE7 Participants
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny SAE (including events with outcome = death)0 Participants
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Number of Participants With Adverse Events (AEs) and Serious AEsAny AE leading to withdrawal from study0 Participants
Secondary

Time to Reach Maximum Observed Concentration Following Drug Administration (Tmax)

Effect of co-administered SZC on the tmax of tacrolimus and cyclosporin in healthy participants was determined.

Time frame: Pre-dose, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25, 2.5, 3, 4, 6, 8, 10, 12, 16, 24, 36, 48, and 72 hours post-dose of tacrolimus or cyclosporin

Population: The PK analysis set consisted of all participants in the safety analysis set and who had at least 1 quantifiable whole blood concentration post-dose for tacrolimus (Cohort 1) or for cyclosporin (Cohort 2) and who had no major protocol deviations thought to impact on the analysis of the PK data.

ArmMeasureValue (MEDIAN)
Treatment A: Tacrolimus (5 mg)Time to Reach Maximum Observed Concentration Following Drug Administration (Tmax)1.75 hour
Treatment B: Tacrolimus (5 mg) and SZC (15 g)Time to Reach Maximum Observed Concentration Following Drug Administration (Tmax)1.50 hour
Treatment C: Cyclosporin (100 mg)Time to Reach Maximum Observed Concentration Following Drug Administration (Tmax)1.50 hour
Treatment D: Cyclosporin (100 mg) and SZC (15 g)Time to Reach Maximum Observed Concentration Following Drug Administration (Tmax)1.25 hour
Comparison: Tacrolimus90% CI: [73.38, 95.84]
Comparison: Cyclosporin90% CI: [87.16, 109.2]

Source: ClinicalTrials.gov · Data processed: Feb 12, 2026