This phase I trial studies the process by which sotrovimab is absorbed, distributed, metabolized, and eliminated by the body (pharmacokinetics) in hematopoietic stem cell transplant recipients. Sotrovimab is a monoclonal antibody that may target and bind to a specific protein on SARS-CoV-2 and block its viral attachment and entry into human cells. This may slow the progression of the disease and accelerate recovery, and may potentially provide temporary protection against infection with SARS-CoV-2 in hematopoietic stem cell transplant recipients.
Study sponsor and potential other locations can be found on ClinicalTrials.gov for NCT05135650.
PRIMARY OBJECTIVE:
I. To determine the levels of sotrovimab (VIR-7831) monoclonal antibody (mAb) post-transplant in serum over time.
SECONDARY OBJECTIVES:
I. To compare the half-life of VIR-7831 in autologous versus (vs.) allogeneic transplant, cord vs. non-cord allogeneic transplant, matched vs mismatched donors, in patients with and without graft-versus-host disease (GVHD), and in patients with and without diarrhea.
II. To monitor the frequency of breakthrough SARS-CoV-2 acquisition in hematopoietic stem cell transplant (HCT) recipients who have received VIR-7831.
III. To compare antibody levels from serum collected by venipuncture versus self-collected using a TASSO device.
IV. To monitor the development of anti-drug antibodies.
V. To monitor safety.
EXPLORATORY OBJECTIVE:
I. To measure VIR-7831 and SARS-CoV-2 neutralizing antibodies in nasal swabs and SARS-CoV-2 neutralizing antibodies in serum.
OUTLINE:
Patients receive sotrovimab intravenously (IV) over 30 minutes within 1-7 days prior to the start of pre-transplant conditioning. Patients also undergo blood and nasal swab sample collection throughout the trial.
After completion of study treatment, patients are followed up for 24 weeks.
Lead OrganizationFred Hutch/University of Washington/Seattle Children's Cancer Consortium
Principal InvestigatorAlpana Waghmare