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ACTIVE NOT RECRUITING
NCT05357482
PHASE1/PHASE2

Addition of JSP191 (C-kit Antibody) to Nonmyeloablative Hematopoietic Cell Transplantation for Sickle Cell Disease and Beta-Thalassemia

Sponsor: National Heart, Lung, and Blood Institute (NHLBI)

View on ClinicalTrials.gov

Summary

Background: Sickle cell disease (SCD) is an inherited disorder of the blood. It can damage a person s organs and cause serious illness and death. A blood stem cell transplant is the only potential cure for SCD. Treatments that improve survival rates are needed. Objective: To find out if a new antibody drug (briquilimab, JSP191) improves the success of a blood stem cell transplant Eligibility: People aged 13 or older who are eligible for a blood stem cell transplant to treat SCD. Healthy family members over age 13 who are matched to transplant recipients are also needed to donate blood. Design: Participants receiving transplants will undergo screening. They will have blood drawn. They will have tests of their breathing and heart function. They may have chest x-rays. A sample of marrow will be collected from a pelvic bone. Participants will remain in the hospital about 30 days for the transplant and recovery. They will have a large intravenous line inserted into the upper arm or chest. The line will remain in place for the entire transplant and recovery period. The line will be used to draw blood as needed. It will also be used to administer the transplant stem cells as well as various drugs and blood transfusions. Participants will also receive some drugs by mouth. Participants must remain within 1 hour of the NIH for 3 months after transplant. During that time, they will visit the clinic up to 2 times a week. Follow-up visits will include tests to evaluate participants mental functions. They will have MRI scans of their brain and heart.

Official title: Addition of JSP191 (C-kit Antibody) to Non-myeloablative Hematopoietic Cell Transplantation For Sickle Cell Disease and Beta-Thalassemia

Key Details

Gender

All

Age Range

4 Years - 100 Years

Study Type

INTERVENTIONAL

Enrollment

40

Start Date

2022-05-12

Completion Date

2027-01-31

Last Updated

2026-03-12

Healthy Volunteers

No

Interventions

RADIATION

TBI

300 cGy total body irradiation (TBI, day -2)

DRUG

Hydroxyurea

Optimized 4-12 weeks prior to planned transplant date

BIOLOGICAL

briquilimab

briquilimab, anti-CD117 monoclonal antibody at 0.6mg/kg at day -11 prior to infusion of allogeneic HSCs

DRUG

Filgrastim (G-CSF)

May be used to minimize the days of neutropenia, and may be administered beginning near day 10 post stem cell infusion at 5 mcg/kg (rounding to the nearest vial) at the discretion of investigator.

DRUG

Sirolimus

For immune suppression (day -1)

BIOLOGICAL

Alemtuzumab

Alemtuzumab 1 mg/kg of alemtuzumab divided over 5 days (-7 through -3),

DRUG

Plerixafor

For autologous HSC collection; dose of plerixafor at 240 mcg/kg (capped at 20mg)

Locations (1)

National Institutes of Health Clinical Center

Bethesda, Maryland, United States