Impact of Acute ITTP Therapies on Long Term Neurologic and Cognitive Outcomes in ITTP Survivors

NCT ID: NCT06358703

Last Updated: 2024-11-13

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Total Enrollment: 116 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2024-12-31
• Study Completion Date: 2028-05-31

Brief Summary

1. We expect to find that the silent cerebral infarct (SCI) rate is two fold higher in patients treated without caplacizumab. We also expect to find that the rate of mild and major cognitive impairment in patients treated with caplacizumab within 3 days of starting plasma exchange will be lower than patients treated without caplacizumab.

2. We expect that the differences in cognitive impairment in cases (caplacizumab) versus controls (no caplacizumab) will persist on serial evaluation 1 year later. We also expect that there will be differences in these groups even after adjusting for time since episode and severity of presentation.

3. We expect to find that SCI and cognitive impairment is associated with worse scores on the health related quality of life instrument (SF-36)

4. Based on studies in non-TTP populations, we expect to find that the rate of incident stroke over the period of follow up is at least 2 fold higher in patients that have SCI compared with patients who do not have SCI

Conditions

Immune Thrombotic Thrombocytopenia

Study Design

• Observational Model Type: CASE_CONTROL
• Study Time Perspective: PROSPECTIVE

Study Groups

Cases

Caplacizumab

Intervention Type: DRUG

Early Caplacizumab use

Controls

No interventions assigned to this group

Interventions

Caplacizumab

Early Caplacizumab use

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

1. Age >= 18 years

2. Confirmed iTTP based on ADAMS13 activity < 10 % (or 10-20% with positive inhibitor or antibody) during an acute iTTP episode

3. Only 1 episode of iTTP that was treated with plasma exchange and caplacizumab started within 3 days of diagnosis (or if more than 1 episode, then all episodes treated with plasma exchange and caplacizumab started within 3 days of diagnosis)

Exclusion Criteria

1. Any contraindication for MRI (metallic implants, shrapnel, MRI incompatible stents, etc)

2. Unable to speak, read or understand instructions in English (for NIH ToolBox)

3. Combination of iTTP episodes treated without caplacizumab or with caplacizumab.

4. Caplacizumab started at >= 4 days from diagnosis or for refractory iTTP

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

US Thrombotic Microangiopathy Alliance

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

USTMA

Groveport, Ohio, United States

Countries

United States

Facility Contacts

Clare Martin

Role: primary

Clare@ustma.org

6149994900

Other Identifiers

P400

Identifier Type: -

Identifier Source: org_study_id