Trial Outcomes & Findings for High-Dose Post-Transplant Cyclophosphamide and Bortezomib (CyBor) for the Prevention of Graft-versus-Host Disease Following Allogeneic Hematopoietic Stem Cell Transplantation (HSCT) (NCT NCT03945591)

NCT ID: NCT03945591

Last Updated: 2026-04-23

Results Overview

Rate of acute GvHD post-transplant. All participants that received a transplant and received any prophylactic treatment will be included in the analysis.

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

23 participants

Primary outcome timeframe

Day 120 Post-Transplant

Results posted on

2026-04-23

Participant Flow

23 participants were consented. 2 of these participants did not initiate the study.

Participant milestones

Participant milestones
Measure
Cyclophosphamide and Bortezomib
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Overall Study
STARTED
21
Overall Study
COMPLETED
16
Overall Study
NOT COMPLETED
5

Reasons for withdrawal

Reasons for withdrawal
Measure
Cyclophosphamide and Bortezomib
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Overall Study
Participant not transplanted
1
Overall Study
Change in treatment plan
3
Overall Study
Adverse Event
1

Baseline Characteristics

High-Dose Post-Transplant Cyclophosphamide and Bortezomib (CyBor) for the Prevention of Graft-versus-Host Disease Following Allogeneic Hematopoietic Stem Cell Transplantation (HSCT)

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Age, Continuous
63 years
n=60 Participants
Sex: Female, Male
Female
7 Participants
n=60 Participants
Sex: Female, Male
Male
9 Participants
n=60 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
2 Participants
n=60 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
14 Participants
n=60 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=60 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=60 Participants
Race (NIH/OMB)
Asian
0 Participants
n=60 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=60 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=60 Participants
Race (NIH/OMB)
White
16 Participants
n=60 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=60 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=60 Participants
Region of Enrollment
United States
16 participants
n=60 Participants

PRIMARY outcome

Timeframe: Day 120 Post-Transplant

Rate of acute GvHD post-transplant. All participants that received a transplant and received any prophylactic treatment will be included in the analysis.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=13 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Percentage of Participants Who Experience Acute GvHD
38.46 percentage of participants
Interval 22.0 to 47.0

PRIMARY outcome

Timeframe: Day 365 Post-Transplant

Rate of chronic GvHD post-transplant. All participants that received a transplant and received any prophylactic treatment will be included in the analysis.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=11 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Percentage of Participants Who Experience Moderate to Severe Chronic GvHD
36.36 percentage of participants
Interval 22.0 to 46.0

SECONDARY outcome

Timeframe: Day 45 Post-Transplant

Incidence of graft failure will be calculated from date of transplant to failure for all patients who receive a transplant and any prophylactic treatment and from date of completion of prophylactic treatment for all participants that completed treatment. Graft failure is defined as failure to achieve neutrophil engraftment by day 28 post-transplant or lack of donor chimerism \> 50% by day 45 post-transplant not due to the underlying malignancy.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Incidence of Primary Graft Failure
0 Percentage of participants

SECONDARY outcome

Timeframe: Day 30 Post-Transplant

Incidence of poor graft function will be calculated from date of transplant to failure for all patients who receive a transplant and any prophylactic treatment and from date of completion of prophylactic treatment for all participants that completed treatment. Poor graft function is defined by at least 2 of the following 3 criteria: Hemoglobin \< 8 g/dL, ANC \< 0.5 109/L, and platelets \< 20 109/L. The cytopenia must be unexplained (such as by disease relapse) and unresponsive to cytokines and must last at least 4 weeks.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Incidence of Poor Graft Function
0 Percentage of participants

SECONDARY outcome

Timeframe: Day 730 Post-Transplant

Incidence of secondary graft failure is evaluated after engraftment is achieved; this outcome is calculated from date of engraftment for all patients with engraftment. Secondary graft failure is defined as poor graft function associated with donor chimerism \< 5%.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Incidence of Secondary Graft Failure
0 Percentage of participants

SECONDARY outcome

Timeframe: Day 730 Post-Transplant

Number of participant deaths not attributable to disease relapse or progression . This outcome is analyzed based on participants that who received a transplant with any prophylactic treatment and for all patients who received a transplant and completed prophylactic treatment.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Treatment Related Mortality (TRM)
1 Participants

SECONDARY outcome

Timeframe: Day 730 Post-Transplant

Percentage of participants in whom the disease for which transplant is performed is evident by methods of disease detection after transplant. This outcome is analyzed for all patients who received a transplant and for all transplanted patients that completed treatment.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Relapse Rate (RR)
12.50 Percentage of participants

SECONDARY outcome

Timeframe: Day 730 Post-Transplant

Percentage of participants who are without reported GvHD III-IV acute GvHD, chronic GvHD requiring systemic therapy and have not experienced relapse or death after transplant.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Graft Versus Host Disease Relapse Free Survival (GRFS)
62.50 Percentage of participants

SECONDARY outcome

Timeframe: Day 730 Post-Transplant

Percentage of participants alive at the end of the study's evaluation period.

Outcome measures

Outcome measures
Measure
Cyclophosphamide and Bortezomib
n=16 Participants
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Overall Survival (OS)
87.50 Percentage of participants

Adverse Events

Cyclophosphamide and Bortezomib

Serious events: 7 serious events
Other events: 10 other events
Deaths: 2 deaths

Serious adverse events

Serious adverse events
Measure
Cyclophosphamide and Bortezomib
n=16 participants at risk
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Gastrointestinal disorders
Abdominal Pain
18.8%
3/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Blood and lymphatic system disorders
Anemia
25.0%
4/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Metabolism and nutrition disorders
Anorexia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Ascites
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Investigations
Blood Bilirubin Increased
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Psychiatric disorders
Confusion
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Cytomegalovirus Infection Reactivation
18.8%
3/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
General disorders
Death
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Injury, poisoning and procedural complications
Fall
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
General disorders
Fever
25.0%
4/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Metabolism and nutrition disorders
Hyponatremia
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Vascular disorders
Hypotension
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
COVID Infection
18.8%
3/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
BK Viremia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Adenovirus
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Blood and lymphatic system disorders
Methemoglobinemia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Sepsis
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Nervous system disorders
Syncope
25.0%
4/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.

Other adverse events

Other adverse events
Measure
Cyclophosphamide and Bortezomib
n=16 participants at risk
Bortezomib: 1.3 mg/m2 IV 6 hours after graft infusion and 72 hours thereafter. Cyclophosphamide: 50 mg/kg IV over 2 hours on Day +3 and +4
Psychiatric disorders
Agitation
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Investigations
Alanine Aminotransferase Increased
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Investigations
Alkaline Phosphatase Increased
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Investigations
Aspartate Aminotransferase Increased
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Cardiac disorders
Atrial Fibrillation
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Bacteremia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Bloating
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Constipation
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Diarrhea
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Nervous system disorders
Dizziness
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Dysphagia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Respiratory, thoracic and mediastinal disorders
Dyspnea
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Epstein-Barr virus infection reactivation
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Blood and lymphatic system disorders
Febrile Neutropenia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Gastric Hemorrhage
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Nervous system disorders
Headache
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Renal and urinary disorders
Hematuria
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Vascular disorders
Hypertension
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Metabolism and nutrition disorders
Hypokalemia
18.8%
3/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Metabolism and nutrition disorders
Hypomagnesemia
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Hypoxia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
C. Difficile
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Mucositis Oral
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Nausea
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
General disorders
Pain
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Investigations
Platelet Count Decreased
25.0%
4/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Skin and subcutaneous tissue disorders
Pruritus
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Skin and subcutaneous tissue disorders
Rash maculo-papular
12.5%
2/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Respiratory, thoracic and mediastinal disorders
Secretions
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Cardiac disorders
Sinus Tachycardia
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Skin and subcutaneous tissue disorders
Skin Ulceration
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Respiratory, thoracic and mediastinal disorders
Sore Throat
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Upper Gastrointestinal Hemorrhage
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Urinary Tract Infection
18.8%
3/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Infections and infestations
Viremia
18.8%
3/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.
Gastrointestinal disorders
Vomiting
6.2%
1/16 • Adverse events assessed from the start of the conditioning regimen for a minimum of 30 days after the last treatment dose (41 days total). All-cause mortality assessed through day 730 Post-Transplant.
Investigator assessment at each study visit.

Additional Information

Ahmad Al-Homsi

NYU Langone Health

Phone: 6465017621

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place