Bone Marrow Transplantation Using CD34-Selected Stem Cells From Related or Unrelated Donors in Treating Participants With Cancer or Other Disorders

December 29, 2025 updated by: Eneida Nemecek, OHSU Knight Cancer Institute

Institutional Protocol of Bone Marrow Transplantation Using CD34-Selected Peripheral Blood Stem Cells From Related Haploidentical or Unrelated Donors for Treatment of Malignant and Nonmalignant Disorders

This expanded access protocol studies bone marrow transplantation using CD34-selected stem cells from related or unrelated donors in treating participants with cancer or other disorders. Stem cells collected from the donor will be processed using a new device called CliniMACS CD34 Reagent System which marks the blood cells collected from the donor with a special protein called "antibody" that tags only the donor stem cells, sorting out other cells of the blood and immune system. This is done to remove, at least partially, some of the T cells. T cells are the cells in the blood that work as scavengers of the immune system deciding what belongs and what does not. These cells can sometimes cause rejection of the donor graft or a condition called graft-versus host disease (GVHD), where the donor cells can attack the body of the recipient. A bone marrow transplantation using CD34-selected stem cells may reduce the risk of these unwanted side effects of transplant as much as possible.

Study Overview

Status

Available

Conditions

Intervention / Treatment

Detailed Description

PRIMARY OBJECTIVES:

I. To provide a source of CD34-selected stem cells for patients with malignant and nonmalignant disorders undergoing bone marrow transplantation from haploidentical (human leukocyte antigen [HLA]-mismatched) related donors or HLA-compatible unrelated donors

SECONDARY OBJECTIVES:

I. Monitoring the safety of the CD34-selected stem cells for the recipient, as measured by adverse events related to stem cell infusion, incidence of engraftment of neutrophils and platelets, incidence of acute and chronic GVHD, and one year overall survival, disease-free survival, and primary disease recurrence.

OUTLINE:

Donor stem cells undergo CD34 selection ex vivo using the CliniMACS CD34 Reagent System using standard operating procedures (SOPs) from the manufacturer. Recipients undergo standard of care preparative regimen, bone marrow transplantation with CD34-selected peripheral blood stem cells via infusion over 1 to 2 hours on day 0, and then receive standard of care GVHD prophylaxis.

After completion of study treatment, recipients are followed up at least once weekly while inpatient until transplant day 100, every 1-3 months for the first year and yearly thereafter.

Study Type

Expanded Access

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Oregon
      • Portland, Oregon, United States, 97239
        • Available
        • OHSU Knight Cancer Institute

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

No older than 70 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients with malignant or nonmalignant diseases that can benefit from alternative stem cell transplantation according to institutional standard practice guidelines

  • Patients lacking a healthy human leukocyte antigen (HLA)-identical related donor and having one of the following alternative donor sources:

    • HLA-haploidentical related (HLA antigen genotypic match >= 4/8 and <= 7/8) or
    • Unrelated donor that is HLA matched at >= 7/8 HLA antigen loci

  • The selected donor must also be:

    • Able to receive granulocyte colony-stimulating factor (G-CSF, filgrastim) and undergo apheresis either through placement of peripheral or temporary central venous catheter, based on institutional guidelines for peripheral blood stem cell collection
    • Meet all institutional standard criteria for clearance for peripheral stem cell collection

  • Recipients must meet institutional treatment standards based on pre-transplant evaluations including:

    • Adequate major organ functions
    • Free of major systemic infections
    • Not pregnant, if female of childbearing age (post-pubertal)
  • Recipient (if >= 18 years) or their parent/legal guardian (if < 18 years) must be able to sign the informed consent form for the treatment plan; assent will be obtained from recipients 7-17 years of age, in accordance to our institutional guidelines

Exclusion Criteria:

  • Patients not meeting clearance criteria for bone marrow transplantation (BMT) based on standard institutional guidelines
  • Presence of anti-HLA antibodies against donor antigens in a recipient or anti-HLA antibodies against recipient antigens in a donor
  • Known allergy to murine (mouse) protein or iron-dextran

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

OHSU Knight Cancer Institute

Collaborators

Oregon Health and Science University

Investigators

  • Principal Investigator: Eneida Nemecek, MD, OHSU Knight Cancer Institute

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Registration Dates

First Submitted

June 27, 2018

First Submitted That Met QC Criteria

August 7, 2018

First Posted (Actual)

August 13, 2018

Study Record Updates

Last Update Posted (Estimated)

January 2, 2026

Last Update Submitted That Met QC Criteria

December 29, 2025

Last Verified

December 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRB00010804 (Other Identifier: OHSU Knight Cancer Institute)
  • NCI-2018-00556 (Registry Identifier: CTRP (Clinical Trial Reporting Program))
  • NCI-2020-02357 (Registry Identifier: CTRP (Clinical Trial Reporting Program))

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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