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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02214121
Other study ID # D5136C00007
Secondary ID 2014-001006-18
Status Completed
Phase Phase 2
First received
Last updated
Start date September 11, 2014
Est. completion date February 27, 2017

Study information

Verified date November 2018
Source AstraZeneca
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The purpose of this Phase II dose-ranging study is to investigate pharmacokinetic (PK) and pharmacodynamic (PD) properties of various doses of ticagrelor followed by 4 weeks of twice-daily treatment in paediatric patients with sickle cell disease


Description:

This is a multicenter, open-label, dose-ranging study of ticagrelor followed by a double blind, placebo-controlled extension phase in paediatric patients with sickle cell disease (SCD).

Part A: Patients will be randomised 1:1 to receive one of two dosing schedules consisting of two single weight-adjusted doses of ticagrelor. Pharmacokinetic (PK) parameters and pharmacodynamic (PD) measurements will be determined following each dose. Platelet aggregation will be measured using the VerifyNow™ P2Y12 assay.

Following these 2 single doses, all patients will receive open-label one-week treatment with ticagrelor twice daily to determine tolerability prior to randomisation into Part B.

Part B: In this part patients will be randomised (2:1 ratio) to ticagrelor twice daily or placebo for a 4-week treatment phase.

During the study, patients will be followed for the occurrence of vaso-occlusive crisis (VOC) and for other disease manifestations such as daily pain, analgesic use and complications of SCD.


Recruitment information / eligibility

Status Completed
Enrollment 46
Est. completion date February 27, 2017
Est. primary completion date February 27, 2017
Accepts healthy volunteers No
Gender All
Age group 2 Years to 17 Years
Eligibility Inclusion criteria

- Children aged =2 to <18 years of age

- Diagnosed with homozygous sickle cell (HbSS) or sickle beta-zero-thalassaemia (HbS/ß0)

Exclusion criteria

- At risk for haemorrhagic or bradycardic events

- Significant hepatic impairment

- Renal failure requiring dialysis

- Concomitant oral or intravenous therapy with strong CYP3A4 (cytochrome) inhibitors, CYP3A4 substrates with narrow therapeutic indices, or strong CYP3A4 inducers.

- Surgical procedure planned to occur during the study.

- Patients who are currently pregnant or breastfeeding or planning to become pregnant during the study.

- Patients who have known hypersensitivity or contraindication to ticagrelor.

Study Design


Related Conditions & MeSH terms

  • Anemia, Sickle Cell
  • Investigation of Platelet Aggregation in Paediatric Patients With Sickle Cell Disease

Intervention

Drug:
Ticagrelor Dose 1a + Dose 2a
Ticagrelor Dose 1a and ticagrelor Dose 2a single doses + 1 week ticagrelor repeated dosing followed by 4 weeks repeated dosing ticagrelor or placebo.
Ticagrelor Dose 1b + Dose 2b
Ticagrelor Dose 1b and ticagrelor Dose 2b single doses + 1 week ticagrelor repeted dosing followed by 4 weeks repeated dosing ticagrelor or placebo.

Locations

Country Name City State
Canada Research Site Toronto Ontario
Kenya Research Site Kisian
Kenya Research Site Nairobi
Lebanon Research Site Beirut
Lebanon Research Site Beirut
Lebanon Research Site Tripoli
South Africa Research Site Parow
South Africa Research Site Rondebosch
United Kingdom Research Site Cardiff
United Kingdom Research Site London
United Kingdom Research Site London
United Kingdom Research Site Manchester
United States Research Site Charleston South Carolina
United States Research Site Chicago Illinois
United States Research Site Detroit Michigan
United States Research Site Hershey Pennsylvania
United States Research Site Orange California
United States Research Site Philadelphia Pennsylvania

Sponsors (1)

Lead Sponsor Collaborator
AstraZeneca

Countries where clinical trial is conducted

United States,  Canada,  Kenya,  Lebanon,  South Africa,  United Kingdom, 

References & Publications (1)

Hsu LL, Sarnaik S, Williams S, Amilon C, Wissmar J, Berggren A; HESTIA1 Investigators. A dose-ranging study of ticagrelor in children aged 3-17 years with sickle cell disease: A 2-part phase 2 study. Am J Hematol. 2018 Dec;93(12):1493-1500. doi: 10.1002/ajh.25273. Epub 2018 Oct 2. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Other Haemorrhagic Events - Part A From randomisation to Part A (week 0) through Visit 4 (week 2)
Other Haemorrhagic Events - Part B During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Primary P2Y12 Reaction Units (PRU) - Part A PRU measurements are taken in conjunction with single doses at Visit 2 (Day 0) and Visit 3 (Day 7) and after repeated dosing at Visit 4 (Day 14). Up to 8 hours post-dose (6 hours following protocol amendment) Visit 2 and 3, and up to 2 hours Visit 4.
Primary P2Y12 Reaction Units (PRU) - Part B PRU measurements are taken after 4 weeks of double blind treatment at the end of Part B.
Primary Maximum Plasma Concentration (Cmax) - Part A PK measurements (up to 8 hours post-dose) are taken in conjunction with single doses at Visit 2 (Day 0) and Visit 3 (Day 7) and after repeated dosing at Visit 4 (Day 14).
Primary Maximum Plasma Concentration (Cmax) - Part B PK measurements (up to 4 hours post-dose) are taken after 4 weeks of double blind treatment at the end of Part B.
Primary Area Under the Plasma Concentration Time Curve (AUC) - Part A The PK parameter presented was derived using a model based analysis and not from a non-compartmental (NCA) analysis. PK measurements (up to 8 hours post-dose) are taken in conjunction with single doses at Visit 2 (Day 0) and Visit 3 (Day 7) and after repeated dosing at Visit 4 (Day 14).
Primary Area Under the Plasma Concentration Time Curve (AUC) - Part B The PK parameter presented was derived using a model based analysis and not from a non-compartmental (NCA) analysis. PK measurements (up to 4 hours post-dose) are taken after 4 weeks of double blind treatment at the end of Part B.
Secondary Assessment of Ticagrelor Concentration - Part A In conjunction with single doses at Visit 2 (Day 0) and Visit 3 (Day 7), after repeated dosing at Visit 4 (Day 14). Up to 8h post-dose (6h following protocol amendment, no pre-dose) Visit 2 and 3, up to 2h Visit 4 (pre-dose, 1h added following amendment)
Secondary Assessment of Ticagrelor Concentration - Part B PK measurements (up to 4 hours post-dose) are taken after 4 weeks of double blind treatment at the end of Part B.
Secondary Assessment of AR-C124910XX Concentration - Part A AR-C124910XX is the active metabolite of Ticagrelor In conjunction with single doses at Visit 2 (Day 0) and Visit 3 (Day 7), after repeated dosing at Visit 4 (Day 14). Up to 8h post-dose (6h following protocol amendment, no pre-dose) Visit 2 and 3, up to 2h Visit 4 (pre-dose, 1h added following amendment)
Secondary Assessment of AR-C124910XX Concentration - Part B AR-C124910XX is the active metabolite of Ticagrelor PK measurements (up to 4 hours post-dose) are taken after 4 weeks of double blind treatment at the end of Part B.
Secondary Oral Clearance (CL/F) - Part A The PK parameter presented were derived using a model based analysis and not from a non-compartmental (NCA) analysis. PK measurements (up to 8 hours post-dose) are taken in conjunction with single doses at Visit 2 (Day 0) and Visit 3 (Day 7) and after repeated dosing at Visit 4 (Day 14).
Secondary Oral Clearance (CL/F) - Part B The PK parameter presented was derived using a model based analysis and not from a non-compartmental (NCA) analysis. PK measurements (up to 4 hours post-dose) are taken after 4 weeks of double blind treatment at the end of Part B.
Secondary Number of Vaso-occlusive Crises - Part B During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Secondary Number of Vaso-occlusive Crises Requiring Hospitalization or Emergency Department Visits - Part B During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Secondary Percentage of Days Hospitalized for Vaso-occlusice Crisis or Other Complications of Sickle Cell Disease - Part B During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Secondary Percentage of Days With Pain (Age >=4) - Part B Pain measured using the Faces Pain Scale, range 0-10 (0, 2, 4, 6, 8, 10), where 0 is no pain During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Secondary Mean Intensity of Pain (Age >=4) - Part B Pain measured using the Faces Pain Scale, range 0-10 (0, 2, 4, 6, 8, 10), where 0 is no pain During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Secondary Percentage of Days of Analgesic Use (Age >= 4) - Part B During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Secondary Percentage of Days of Opioid Analgesic Use (Age >=4) - Part B During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).
Secondary Percentage of Days of Absence From School or Work (Age >=6) - Part B During 4 weeks of study treatment starting from randomization in Part B (week 2) up to 4 weeks (week 6).