A Phase 1 interventional study of TCRαβ+/CD19+ depleted Hematopoietic stem cell (HSC) graft and CliniMACS® System in Blood Disease, sponsored by University of Wisconsin, Madison. Recruiting at 1 site in United States. Open to participants aged 3 Months to 25 Years. Per ClinicalTrials.gov, last updated 2026-10-29.
Sponsored by University of Wisconsin, Madison · Phase 1, Interventional, and Treatment
This study is being done to see if the investigators can take peripheral blood stem cells from either an adult family member or a closely matched unrelated donor, and run them through a special lab instrument to remove alpha/beta T cells and B cells and then give them to the patient to treat disease. This is an experimental way of doing a hematopoietic stem cell transplant (HSCT). The investigators want to see if the new stem cells will grow without bad graft vs. host disease (GVHD). This treatment approach is experimental in the United States.
This single institution, phase I clinical trial will determine the safety and feasibility of employing T-cell receptor (TCR) αβ+ and CD19+ (Cluster of Differentiation) depleted hematopoietic stem cell transplantation (HSCT) using peripheral blood stem cells (PBMC) from closely matched unrelated donors or haploidentical donors to treat non-malignant hematologic diseases in children and young adults. Allogeneic hematopoietic stem cell transplantation has become a curative option for children and adolescents with a variety of otherwise fatal conditions. To reduce the incidence and severity of graft-versus-host disease (GVHD) associated with allogeneic hematopoietic stem cell transplantation, donor grafts are depleted of T cells, either using CD34+ selection or CD3+/CD19+ depletion of grafts. However, these selection processes also deplete the graft of protective cell subsets, such as γδ T cells, natural killer (NK) cells, monocytes and dendritic cells, which play important roles in the immune response to infectious agents. Moreover, the presence of NK cells and γδ T cells in donor grafts is associated with more rapid immune reconstitution after HSCT transplantation. In order to retain these protective immune cell subsets, this trial will use a novel, highly selective graft engineering process using the Miltenyi CliniMACS system that selectively depletes αβ-T cells and B cells that are responsible for GVHD and Epstein Barr Virus (EBV)-related post-transplantation lymphoproliferative disorder, respectively. Prior to transplantation, patients will be treated with a conditioning regimen, specific for the original disorder.
The primary objective of this study is evaluation of the safety and feasibility of HSCT using TCRαβ+/CD19+ depleted hematopoietic stem cells to treat non-malignant hematologic diseases. This will be assessed by evaluating the incidence of graft failure, grade III-IV acute GVHD and chronic GVHD and TRM.
Secondary objectives include the evaluation of immune reconstitution and incidence of post-transplant infections, adverse events, serious adverse events, overall and disease-free survival and the efficiency of graft processing by the CliniMACS System.
609 studies on the registry are indexed under Hematologic Diseases; 108 are open to participants now.
This study's planned enrollment of 12 is below the median of 50 across 410 interventional studies indexed under Hematologic Diseases.
Browse Hematologic Diseases studies →University of Wisconsin, Madison is the lead sponsor of 1,188 studies on the registry; 181 are open to participants now.
Of its 157 completed or terminated interventional studies of FDA-regulated products, 118 (75%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Patient must be diagnosed with one of the following diseases or disorders:
Hemoglobinopathies
Acquired Bone Marrow Failure Syndromes
Inherited Bone Marrow Failure Syndromes
Inborn Errors of Immunity (IEI) or Primary Immune Regulatory Disorders (PIRD)
Organ Function Requirements
Renal Function
Liver Function
Cardiac Function
Pulmonary Function
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
A 0–100 scale of how well someone can carry out everyday activities. 100 is no complaints and no signs of illness; 70 is able to look after yourself but not to work or keep up normal activity; 50 is needing considerable help and frequent medical care.
Studies often ask for 60 or 70 and above. Your doctor gives the score.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Able to have children. For women this usually means from the first period until menopause, unless permanently unable to through surgery; for men, unless permanently sterile. Read who the line is about — participants, women, men, or their partners.
Criteria about it usually ask for contraception during the study and for a time after it.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Allogeneic and autologous transplant
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Life expectancy
The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Karnofsky performance status (KPS)
A 0–100 scale of how well someone can carry out everyday activities. 100 is no complaints and no signs of illness; 70 is able to look after yourself but not to work or keep up normal activity; 50 is needing considerable help and frequent medical care.
Studies often ask for 60 or 70 and above. Your doctor gives the score.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
GFR and eGFR (kidney filtering)
GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².
Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
LVEF (left ventricular ejection fraction)
The share of blood the heart’s main pumping chamber (the left ventricle) pushes out with each beat, measured by an echocardiogram (heart ultrasound) or a MUGA scan. About 50–70% is normal.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Reproductive potential
Able to have children. For women this usually means from the first period until menopause, unless permanently unable to through surgery; for men, unless permanently sterile. Read who the line is about — participants, women, men, or their partners.
Criteria about it usually ask for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will undergo a conditioning regimen, specific for the original disease, After that peripheral blood stem cell transplant from a haploidentical donor or closely matched unrelated donor, depleted of TCRαβ+ and CD19+ cells using the CliniMACS TCR α/β-biotin and CD19 Systems will be administered intravenously on Day 0 to all participants.
Biological: TCRαβ+/CD19+ depleted Hematopoietic stem cell (HSC) graft · Device: CliniMACS® System
After undergoing a disease specific conditioning regimen (standard of care), participants will receive peripheral blood stem cell transplant from a haploidentical donor or closely matched unrelated donor, depleted of TCR αβ+ and CD19+ cells using the CliniMACS TCR α/β-biotin and CD19 Systems.
The CliniMACS Cell Selection System is based on magnetic-activated cell sorting mechanism. The CliniMACS device is a powerful tool for the isolation of many cell types from heterogeneous cell mixtures.
Incidence of grade III-IV acute graft-versus-host disease (GVHD)
Acute GVHD will be assessed and graded according to the Keystone Consensus Criteria for staging and grading of acute graft-versus-host disease.
Time frame: 100 days post transplantation
Incidence of extensive chronic GVHD
Chronic GVHD will be assessed according to the current CIBMTR (Center for International Blood and Marrow Transplant Research) manual reflecting a grading system published by Sullivan KM (Sullivan 1981).
Time frame: up to 2 years
Incidence of graft failure
Graft failure - defined as failure to achieve ANC \> 500 /µL at Day +28 or initial neutrophil engraftment followed by a decline in ANC \< 500 /µL that is unresponsive to growth factor therapy (secondary graft failure).
Time frame: up to 2 years after graft
Incidence of Treatment Related Mortality (TRM)
TRM - defined as death from any cause other than disease progression.
Time frame: Day +100 post-HSCT
Time to neutrophil engraftment
The time to neutrophil engraftment is defined as the post-transplant day that is the first of 3 consecutive days with an absolute neutrophil count (ANC) of \>500/µL as assessed by CBC.
Time frame: up to 28 days following HSCT
Time to platelet engraftment
The time to platelet engraftment is defined as the post-transplant day that is the first of 3 consecutive days with a platelet count ≥ 20,000/µL as assessed by complete blood count (CBC), without platelet support (transfusion) for 7 days.
Time frame: up to 28 days following HSCT
Percentage donor chimerism using Short Tandem Repeat (STR)
Short tandem repeat (STR) analysis will provide the percentage donor chimerism at specific time points post-transplant.
Time frame: up to 12 months following HSCT
Kinetics of lymphocyte reconstitution via immunophenotyping using flow cytometry
Lymphocyte reconstitution will be assessed at specific time points post-HSCT, expressed as the percentage of white blood cells comprised of T, B and NK cell subsets.
Time frame: up to 12 months following HSCT
CliniMACS system efficiency: Percentage of viable CD34+ cells recovered after the TCRαβ+ and CD19+ depletion procedure
Time frame: up to 12 months following HSCT
CliniMACS system efficiency: log depletion value for CD19/CD20+ B cells after the TCRαβ+ and CD19+ depletion procedure
Time frame: Day 0
CliniMACS system efficiency: log depletion value of TCRαβ+ T cells after the TCRαβ+ and CD19+ depletion procedure
Time frame: Day 0
CliniMACS system efficiency: number of viable blood cell subsets after the TCRαβ+ and CD19+ depletion procedure
Number of viable CD34+ blood stem cells, CD20+ B cells, CD3-CD56+ NK cells, TCRαβ+ T cells, and TCRγδ+ T cells in the HSC graft after the TCRαβ+ and CD19+ depletion procedure
Time frame: Day 0
Correlation between GVHD incidence and donor killer-cell immunoglobulin-like receptor (KIR) haplotype content
Time frame: up to 2 years
Correlation between GVHD incidence and killer-cell immunoglobulin-like receptor (KIR)/KIR-ligand mismatch between donor and recipient.
Time frame: up to 2 years
Event free survival
An event is defined as death, graft failure or stable mixed chimerism with disease recurrence.
Time frame: up to 1 years
Overall survival (OS)
Time frame: up to 2 years
Incidence of symptomatic bacterial/fungal and viral reactivation requiring therapy
The incidence of infections (symptomatic bacterial/fungal and viral reactivation requiring therapy) will be used as an additional safety measure
Time frame: up to 1 year
Number of participants with adverse events related to infusion of the HSC graft
Time frame: Day 0
Incidence of serious adverse events
Time frame: up to 2 years
Plan to share: Yes — The Principal Investigator, Sponsor and funding institutions (if applicable) will ensure that all mechanisms used to share data include proper plans and safeguards to protect the rights and privacy of participants who participate in this research.
Supporting information: Study protocol, Statistical analysis plan
No publications or documents are linked to this record.
Start is estimated for Nov 2026; primary completion for Jun 2029, 31 months later.
Of 33 phase 1 interventional studies under Hematologic Diseases, half reached primary completion within 26 months of starting (the median), counting those still running; a quarter within 16 and three quarters within 74. This study's planned 31 months is above that.
Start moved twice since we started tracking on Sep 25, 2026: Sep 2026 → Nov 2026, last on Oct 29, 2026.
Earlier changes are on the record history on ClinicalTrials.gov ↗
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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