Feasibility and Efficacy of Modified Donor Lymphocytes Infusion (CD45RA Negative Selected) After Haploidentical Transplantation With Post-transplantation Cyclophosphamide in Patients With Hematological Malignancies (ONC-2016-002).

Not Applicable

Completed

• Conditions: Graft Vs Host Disease; Infection; Hematological Malignancy; Bone Marrow Transplant Infection; Bone Marrow Transplant Complications
• Interventions: Biological: modified donor lymphocytes infusion (mDLI)

• Registration Number: NCT04687982
• Lead Sponsor: Istituto Clinico Humanitas

Brief Summary

Interventional non-randomized trial. The duration of study will be 47 months.

After haploidentical transplantation, patients without complications, mainly a GVHD ≥ grade 2, will receive mDLI. mDLI consists of donor lymphocytes infusion, harvested by apheresis the day before the day planned for infusion (or up to -7 days) as outpatient basis in the Day Hospital using a cell separator.

The mDLIs preparation will be performed using a CliniMACS® (Miltenyi). A CD45RA-depletion Product LineTM from Miltenyi, including disposable reagents and devices, will be used.

The planned number of mDLI is 3.

1. Day +50 (+/- 7 days) from allogenic transplant, 1st mDLI 5x105CD3+/kg of recipient.

2. 4-6 weeks after 1st DLI, 2nd mDLI 1x106CD3+/kg of recipient.

3. 4-6 weeks after 2nd DLI, 3rd mDLI 5x106CD3+/kg of recipient. Day +50 was chosen as the starting time-point because at that time over two thirds of all acute GvHD episodes have already occurred in the absence of DLI (internal data, median +49 after bone marrow, +27 after peripheral stem cells); acute GvHD will thus be less likely a confounding factor. The choice of a maximum number of 3 mDLIs is based on the relatively narrow time interval where outcome improvement is expected, that is mainly in the first 6 months after haplo-HSCT. The planned doses are those mainly used in conventional DLIs during haplo-HSCT setting.

Stopping infusion rules:

If GvHD ≥ Grade 2 or relapse occurs, mDLIs will not be administered at any time and patient will be permanently discontinued from treatment.

If any severe adverse event (SAE) occurs after the first mDLI, the administration of mDLI will be interrupted for a maximum of 6 weeks until event resolution. If the SAE does not resolve after 6 weeks from last mDLI infusion, patient will be permanently discontinued. At any time, the experimental treatment may be stopped according to clinical judgement or patient's willing.

Detailed Description

Not available

Study Timeline

• Study Start: 2018-11-13
• Primary Completion: 2020-01-08
• Study Completion: 2020-01-08
• Status Verified: 2020-12
• Study First Submitted: 2020-12-10
• Study First Submitted QC: 2020-12-24
• Last Update Submitted: 2020-12-24
• Study First Posted: 2020-12-29
• Last Update Posted: 2020-12-29

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 19

Inclusion Criteria

1. Written, signed informed consent;
2. Adult patients aged ≥18 years;
3. Patients who underwent haploidentical transplantation with PT-Cy for haematological diseases since no more than 56 days;
4. Patient who received myeloablative conditioning regimen, reduced intensity conditioning regimens, or non-myeloablative conditioning regimens;
5. Availability of haploidentical donor (defined as those with ≥ 2 differences within one HLA haplotype) who agree to donate peripheral blood cells by leukapheresis and able to donate the day before the day planned for infusion (or up to - 7 days);
6. GVHD/HVG prophylaxis consists in Cyclophosphamide: 50 mg/kg/day, day +3 and +4, Cyclosporine A: 3 mg/kg/day from day +5 to day +100, with tapering in 2 months Mycophenolate mofetil: 45 mg/kg/day, from day +5 to day +35.

Exclusion Criteria

1. Presence of grade 2-4 acute GVHD;
2. Uncontrolled bacterial, viral or fungal infection;
3. Aplasia defined as ANC less than 500/L;
4. Evidence of disease progression after transplantation;
5. Current participation in another clinical study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
mDLI infusion	modified donor lymphocytes infusion (mDLI)	The planned number of mDLI is 3. 1. Day +50 (+/- 7 days) from allogenic transplant, 1st mDLI 5x105CD3+/kg of recipient. 2. 4-6 weeks after 1st DLI, 2nd mDLI 1x106CD3+/kg of recipient. 3. 4-6 weeks after 2nd DLI, 3rd mDLI 5x106CD3+/kg of recipient.

Primary Outcome Measures

Name	Time	Method
to evaluate the efficacy of CD45RA-depleted haplo-DLIs (mDLIs) in the setting of patients receiving haplo-HSCT and PT-Cy, in terms of incidence of viral infections in the post-transplant period	100 days	The primary endpoint is the rate of viral infections at day +100 after haplo-BMT.
to evaluate the impact of the modified DLIs on relapse (graft-versus-tumor effect)	1 year	relapse rate
to evaluate the impact of the modified DLIs on the occurrence of GvHD	1 year	acute and chronic GvHD incidence
to evaluate the impact of the modified DLIs on other types of infections;	100 days	100-day cumulative incidence of other type of infections

Trial Locations

Locations (1)

Istituto Clinico Humanitas; 🇮🇹 Rozzano, MI, Italy