- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03810352
Association of Platelet Parameters With Bleeding Severity in Children With ITP (ITP-APPS)
Association of Platelet Parameters Identified by the Sysmex XN-1000 and Flow Cytometry With Concurrent and Subsequent Bleeding Severity in Children With Immune Thrombocytopenia (ITP): A Multicenter Study
Study Overview
Status
Conditions
Detailed Description
Many children with severe immune thrombocytopenia (ITP) present with mild symptoms and their disease spontaneously resolves within 3 to 6 months. However, a subset of pediatric ITP patients experience severe bleeds and their symptoms persist for more than 6 to 12 months. Both patient populations present with similarly low platelet counts, making it difficult to predict the disease course and to decide on a treatment plan. The current American Society of Hematology treatment guidelines advise that most cases of ITP may be managed through close observation, while pharmacological interventions that may result in treatment-related toxicities may be used in patients with more severe bleeding symptoms. In order to improve the care and management of pediatric patients with ITP, it is necessary to develop a better predictor of bleeding events and disease severity than the patient's platelet count.
In a previous single-center study, investigators studied the association of different platelet parameters with patient bleeding severity. Using whole blood from patients diagnosed with severe ITP, investigators measured the immature platelet fraction (IPF) and absolute immature platelet count (IPC) through a hematology analyzer (Sysmex XN-1000). Investigators performed functional tests on the platelets and analyzed them through flow cytometry. In this study, the investigators found that the IPF and IPC is associated with patient bleeding severity, independent of platelet count. It was also determined that functional activation markers such as P-selectin and glycoprotein (GP) IIb-IIIa are significantly associated with subsequent bleeding severity in children, independent of platelet count. The results of these proposed studies in ITP patients may suggest clinically relevant uses of these assays.
To confirm these findings, this trial will repeat the previous study in a multi-center patient population, including a greater number of patients with severe bleeding and low platelet counts.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Contact
- Name: Andrew L. Frelinger, PhD
- Phone Number: 617-919-2537
- Email: andrew.frelinger@childrens.harvard.edu
Study Contact Backup
- Name: Micaela Hayton
- Phone Number: 617-355-3748
- Email: Micaela.Hayton@childrens.harvard.edu
Study Locations
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Colorado
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Aurora, Colorado, United States, 80045
- Children's Hospital Colorado
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Massachusetts
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Boston, Massachusetts, United States, 02115
- Boston Children's Hospital
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New York
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New York, New York, United States, 10032
- Columbia University Medical Center
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North Carolina
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Durham, North Carolina, United States, 27710
- Duke University Medical Center
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Pennsylvania
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Philadelphia, Pennsylvania, United States, 19104
- Children's Hospital of Philadelphia
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Texas
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Houston, Texas, United States, 77030
- Baylor College of Medicine
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- Diagnosed with primary or secondary immune thrombocytopenia.
- Platelet count of < 50 x 10^9/L
Exclusion Criteria:
- May not have received aspirin 10 days prior to study entry.
- May not have received nonsteroidal anti-inflammatory drugs (NSAIDs) 3 days prior to study entry.
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Cross-Sectional
Cohorts and Interventions
Group / Cohort |
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Patients with ITP
Patients with primary or secondary immune thrombocytopenia
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Association of IPF with concurrent, subsequent and worst-ever bleeding in children with ITP.
Time Frame: February 2019-August 2022
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Evaluate in a multi-center study the association, independent of platelet count, of IPF measured by the Sysmex XN-1000 with concurrent, subsequent, and worst-ever bleeding in children with ITP.
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February 2019-August 2022
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Association of IPC with concurrent, subsequent, and worst-ever bleeding in children with ITP
Time Frame: February 2019-August 2022
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Evaluate in a multi-center study the association, independent of platelet count, of immature platelet parameters measured by the Sysmex XN-1000 (IPC, Plt-F, and FSC and other research parameters as applicable) with concurrent, subsequent, and worst-ever bleeding in children with ITP.
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February 2019-August 2022
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Association of platelet function markers with concurrent, subsequent, and worst-ever bleeding in children with ITP.
Time Frame: February 2019-August 2022
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Evaluate in a multi-center study the association, independent of platelet count, off circulating andd agonist-stimulated platelet surface P-selectin and activated GPIIb-IIIa with concurrent, subsequent, and worst-ever bleeding in children with ITP.
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February 2019-August 2022
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Collaborators and Investigators
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Pathologic Processes
- Immune System Diseases
- Autoimmune Diseases
- Hematologic Diseases
- Hemorrhage
- Hemorrhagic Disorders
- Blood Coagulation Disorders
- Skin Manifestations
- Blood Platelet Disorders
- Thrombotic Microangiopathies
- Purpura, Thrombocytopenic
- Purpura
- Cytopenia
- Purpura, Thrombocytopenic, Idiopathic
- Thrombocytopenia
Other Study ID Numbers
- P00030227
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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