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Phase 3 study of Posoleucel cell therapy for the treatment of adenovirus infection in children and adults receiving standard of care following transplantation of hematopoietic cells (cells responsible for the production of mature blood cells in bone marrow).

Phase 3, Randomized, Double-Blind, Placebo-Controlled Trial, with Cross-Over, of Posoleucel (ALVR105) for the Treatment of Adenovirus Infection in Pediatric and Adult Participants Receiving Standard of Care Following Allogeneic Hematopoietic Cell Transplantation

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2021-003450-22-ES
Enrollment
80
Registered
2021-12-22
Start date
2022-02-11
Completion date
Unknown
Last updated
2024-02-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

AdV infection in pediatric and adult allo HCT recipients receiving standard of care MedDRA version: 21.1 Level: PT Classification code 10060931 Term: Adenovirus infection System Organ Class: 10021881 - Infections and infestations

Interventions

Product Name: Posoleucel Product Code: ALVR105 Pharmaceutical Form: Dispersion for infusion INN or Proposed INN: Posoleucel Current Sponsor code: Viralym-M (ALVR105) Other descriptive name: Allogeneic

Sponsors

AlloVir, Inc.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Male or female >1 year of age. 2. Has undergone allogeneic (including umbilical cord) cell transplantation =21 days prior to randomization and has demonstrated engraftment with an absolute neutrophil count >500/mm3, AND has one of the following: a. AdV viremia DNA =10,000 copies/mL at screening, OR b. Two consecutive and rising AdV viremia DNA results of =1,000 copies/mL at screening, AND i. has absolute lymphocyte count =65 years) yes F.1.3.1 Number of subjects for this age range 4

Exclusion criteria

Exclusion criteria: 1. Grade >2 acute GVHD (see Appendix 6 for information on acute GVHD grading and severity). 2. Ongoing therapy with high-dose systemic corticosteroids (ie, prednisone dose >0.5 mg/kg/day or equivalent). 3. Has either of the following laboratory parameters at screening: a. Aspartate aminotransferase and alanine aminotransferase serum levels =5 times the upper limit of normal (ULN), OR b. Direct bilirubin serum levels =3 times the ULN. 4. Relapse of primary malignancy, or any other active malignancy, except for non-melanoma skin cancer. 5. Grade 4 diarrhea (ie, life-threatening consequences with urgent intervention indicated) regardless of attribution ongoing or within 7 days prior to randomization. 6. Uncontrolled viral (other than AdV), bacterial, or fungal infection(s) leading to hemodynamic instability or radiologic or laboratory evidence attributable to worsening disease. 7. Requirement for fraction of inspired oxygen >0.5 to maintain arterial oxygen saturation >90% (via pulse oximetry) or need for mechanical ventilation. 8. Prior therapy with anti-thymocyte globulin, alemtuzumab (Campath®), or other immunosuppressive T cell monoclonal antibodies within 28 days prior to randomization. 9. Prior donor lymphocyte infusion or CD34+ stem cell infusion within 21 days prior to randomization. Other protocol-defined criteria apply.

Design outcomes

Primary

MeasureTime frame
Main Objective: To compare the percent of participants who have clearance of AdV viremia at Day 29 in participants receiving posoleucel and SoC to that in participants receiving placebo and SoC.;Secondary Objective: 1) To determine the percent of participants who develop target organ AdV disease or whose target organ disease progresses by Day 29. 2) To evaluate the effect of posoleucel on AdV viremia over a 28-day period. 3) To determine the percent of participants who develop target organ AdV disease or whose target organ disease progresses during the study. 4) To determine the percentage of participants who achieve AdV viremia <400 copies/mL AdV DNA. 5) To assess the effect of posoleucel on time to clearance of AdV viremia. 6) To evaluate the proportion of participants who have recurrence of viremia (=10,000 copies/mL AdV DNA) and/or target organ disease during the study 7) To evaluate the proportion of participants who are target organ disease-free at Day 29 and at the end of the study.;Primary end point(s): Proportion of participants with undetectable viremia (less than lower limit of quantitation [LLOQ]) at Day 29.;Timepoint(s) of evaluation of this end point: baseline, Day 29

Secondary

MeasureTime frame
Secondary end point(s): 1) Proportion of participants with disease progression or non-relapse mortality by Day 29. 2) Proportion of participants with undetectable viremia (less than LLOQ) at Day 29 in participants without AdV disease at screening. 3) Proportion of participants with undetectable viremia (less than LLOQ) at Day 29 in participants with AdV disease at screening. 4) Time-averaged area under the concentration-time curve (AAUC) for plasma AdV viremia (log10 copies/mL AdV DNA) as assayed by quantitative polymerase chain reaction (qPCR) through Day 29 for all participants. 5) AAUC for plasma AdV viremia (log10 copies/mL AdV DNA) as assayed by qPCR through Day 29 for participants with no target organ disease at screening. 6) Proportion of participants with disease progression or non-relapse mortality during the study. 7) Proportion of participants who achieve AdV viremia <400 copies/mL AdV DNA at Day 29. 8) Time to undetectable AdV viremia (less than LLOQ). 9) Proportion of participants with AdV disease recurrence during the study among participants who had clearance of AdV viremia (prior to any cross-over) 10) Proportion of participants who are target organ disease-free at Day 29 and at the end of the study.;Timepoint(s) of evaluation of this end point: 1) continuous, Day 29 2,3) baseline, Day 29 4,5) Day 29 6) continuous / end of study 7) Day 29 8,9) weekly 10) baseline, Day 29, EoT

Countries

Italy, Spain, Sweden

Contacts

Public ContactClinical Trials Information Line

AlloVir, Inc.

ClinicalTrials@allovir.com

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026