Defibrotide Prophylaxis of Transplant Associated-Thrombotic Microangiopathy for Neuroblastoma

Neuroblastoma Clinical Trial

Official title:

Defibrotide Prophylaxis of Transplant Associated-Thrombotic Microangiopathy in Patients With High-Risk Neuroblastoma Receiving Tandem Transplants

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT06182410
• Other study ID #: 230822
• Secondary ID: NCI-2023-10277
• Status: Not yet recruiting
• Phase: Phase 2
• Start date: June 1, 2024
• Est. completion date: March 31, 2027

Study information

• Verified date: April 2024
• Source: University of California, San Francisco
• Contact: Kevin Magruder
• Phone: (415) 476-3834
• Email: Kevin.Magruder[@]ucsf.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This phase II trial tests how well defibrotide works in preventing transplant-associated thrombotic microangiopathy (TA-TMA) in patients with high-risk neuroblastoma undergoing tandem transplants (hematopoietic stem cell transplant [HSCT]). TMA is a potential life-threatening complication of stem cell transplant. TMA is a possible side effect of the chemotherapy (conditioning regimen) patients receive to help treat high-risk neuroblastoma, because these medicines can sometimes damage the blood vessel walls in the body. This damage leads to formation of tiny blood clots in organs, especially the kidney. This then causes organ damage and leads to problems with how they function. This study may help researchers learn how defibrotide may help prevent TMA before it starts, or help treat it once it starts among patients with high-risk neuroblastoma undergoing tandem transplants.

Description:

PRIMARY OBJECTIVE:

I. To determine if administration of prophylactic defibrotide sodium (defibrotide) will prevent the development of TA-TMA in participants with high-risk neuroblastoma receiving tandem transplants compared to historic controls.

SECONDARY OBJECTIVES:

I. To evaluate the efficacy of defibrotide in the prevention of severe TA-TMA, as defined by any TA-TMA with one or more of the following complications:

Ia. Renal failure requiring dialysis; Ib. Pleural or pericardial effusion requiring any surgical intervention; Ic. Central nervous system dysfunction, including seizure, posterior reversible encephalopathy syndrome (PRES); Id. Pulmonary hypertension; Ie. Biopsy-proven gastrointestinal involvement with bleeding; If. Death not related to relapse of underlying neuroblastoma; II. To determine the incidence of grade ≥ 3 hemorrhage (per Common Terminology Criteria for Adverse Events (CTCAE) version 5.0) in participants on prophylactic defibrotide (grade 3 hemorrhage = transfusion indicated; invasive intervention indicated; hospitalization).

EXPLORATORY OBJECTIVES:

I. To evaluate the incidence of hepatic sinusoidal obstructive syndrome (SOS) grade >= 2 (per Cairo criteria) with first and second HSCT.

II. To evaluate the percentage of patients who go on to second transplant compared to historic controls.

III. To evaluate median time in days to start of subsequent therapy (radiation and immunotherapy) and percent of patients who have delays compared to historic controls.

OUTLINE:

Participants receive defibrotide intravenously (IV) over 2 hours every 6 hours (Q6H) on days -8 to +21 during their first and second HSCT in the absence of unacceptable toxicity. After completion of study treatment, participants are followed until day +42 after second transplant and then every 2 weeks until 6 months after first HSCT.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 15
• Est. completion date: March 31, 2027
• Est. primary completion date: March 31, 2027
• Accepts healthy volunteers: No
• Gender: All
• Age group: 1 Year to 18 Years

Eligibility

Inclusion Criteria:

1. Age: 1 - < 18 years old.

2. Participants must have high-risk neuroblastoma according to Children's Oncology Group (COG) risk classification at the time of initial diagnosis. Participants who were initially considered low or intermediate risk, but then reclassified as high risk are also eligible.

3. Participants may have had salvage therapies (i.e., meta-iodobenzylguanidine (MIBG), dinutuximab) after induction but cannot have progressive disease at start of 4.

Planned tandem transplants with conditioning with cyclophosphamide-thiotepa and carboplatin-etoposide-melphalan on, or as per, NCT03126916 (ANBL1531) or other tandem-containing COG high-risk neuroblastoma trials.

4. Participants may be enrolled in upfront neuroblastoma protocol, but this is not required.

5. Upfront MIBG or other therapies is not a contraindication.

6. Organ function per institutional standard of care (SOC) guiding clearance for autologous HSCT.

7. Written informed consent (and assent when applicable) obtained from participant or participant's legal representative and ability for subject to comply with the requirements of the study.

Exclusion Criteria:

1. Life expectancy < 6 months.

2. Pregnant, breastfeeding, or unwilling to practice birth control during participation in the study.

3. Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data.

4. Known bleeding diathesis or bleeding risk deemed by the treating physician to be a contraindication to administration of defibrotide or on concomitant therapeutic anticoagulation. Administration of heparin and/or alteplase for central line maintenance is allowed.

Related Conditions & MeSH terms

• High-risk Neuroblastoma
• Neuroblastoma
• Thrombotic Microangiopathies
• Vascular Diseases

Intervention

Drug:
• Defibrotide
Given intravenously (IV)

Locations

Country	Name	City	State
United States	University of California, San Francisco	San Francisco	California

Sponsors (2)

Lead Sponsor	Collaborator
University of California, San Francisco	Jazz Pharmaceuticals

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Cumulative incidence of transplant-associated thrombotic microangiopathy (TA-TMA)	The cumulative incidence of TA-TMA in participants will be compared to historical controls. The historic controls will be participants with high-risk neuroblastoma who underwent planned tandem transplant at University of California San Francisco (UCSF) between 2017 and 2023.	Up to1 year
Secondary	Cumulative incidence of severe TA-TMA	The cumulative incidence of severe TA-TMA in the patients enrolled on study compared to historical controls.	Up to 1 year