Using cyclophosphamide for older patients after stem cell transplant

IIT2022-03-Paquette-GeriBMT: A Phase I Study of De-Escalation of Post-Transplant Cyclophosphamide Dosing in Patients Aged >/= 65 Years Undergoing Conditioning With Fludarabine and Total Body Irradiation 800 cGy

PHASE1 · Cedars-Sinai Medical Center · NCT05849207

This study is testing the best dose of cyclophosphamide for older patients receiving a specific type of stem cell transplant to see how it affects their recovery and health.

Quick facts

PhasePHASE1
Study typeInterventional
Enrollment26 (estimated)
Ages65 Years and up
SexAll
SponsorCedars-Sinai Medical Center (other)
Drugs / interventionscyclophosphamide
Locations1 site (Los Angeles, California)
Trial IDNCT05849207 on ClinicalTrials.gov

What this trial studies

This phase 1 study aims to find the optimal dose of cyclophosphamide, an immune suppressive drug, for patients aged 65 and older who are undergoing haploidentical stem cell transplantation for hematologic malignancies. Participants will receive either a standard or reduced dose of cyclophosphamide following their transplant. The study will include various assessments such as cardiac MRI scans, laboratory tests, and geriatric evaluations to monitor the patients' health and response to treatment. Follow-up visits will occur at specified intervals up to one year post-transplant.

Who should consider this trial

Good fit: Ideal candidates are patients aged 65 years and older who are eligible for allogeneic stem cell transplantation.

Not a fit: Patients with myelofibrosis or those who have undergone prior stem cell transplants may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could improve transplant outcomes and reduce complications for older patients with hematologic malignancies.

How similar studies have performed: Other studies have explored the use of cyclophosphamide in transplant settings, but this specific approach for older patients is novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patient age \>/= 65 years
* Patient and related Donor (if applicable) sign the Informed Consent Form for the study. If donor is unrelated, donor does not sign Informed Consent Form and this will not affect recipient study eligibility.
* Patient meets standard criteria for allogeneic stem cell transplant
* Patient is deemed suitable to receive Flu/TBI 800 conditioning regimen as standard of care transplant
* Donor is willing to donate peripheral blood stem cells

Exclusion Criteria:

* Patient has a diagnosis of myelofibrosis
* Patient has high titer antibodies (\>10,000 mean fluorescent intensity) against one or more donor HLA antigens
* Patient has undergone prior autologous or allogeneic stem cell transplant
* Requiring sedation for cardiac MRIs.
* Prohibited Implants and/or Devices:

  * Mechanical, magnetic or electrical activated implants (i.e. cardiac pacemakers, neurostimulators and infusion pumps)
  * Ferromagnetic implants and ferromagnetic foreign bodies, such as intracranial, aneurysm clips, shrapnel and intraocular metal chips as these could become dislodged.
* Subjects with claustrophobia, problems being in enclosed spaces, or inability to lie supine.

Where this trial is running

Los Angeles, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Hematologic Malignancies, Allogeneic Transplantation

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.