A Phase II Controlled Trial of Allogeneic Mesenchymal Stromal Cells for the Treatment of Refractory Lupus (MiSLE)

NIH Pandemic-Era Grants

Pandemic Era Grants

2024

Document text

Principal Investigator: Gary S Gilkeson
Organization: MEDICAL UNIVERSITY OF SOUTH CAROLINA
Fiscal Year: 2024
Award: $1,225,013
Funding agency: National Institute of Allergy and Infectious Diseases

Abstract
Cellular therapies for the treatment of autoimmune diseases offers a novel treatment option with possible
increased efficacy and decreased toxicity. We are performing the first multi-center double blind placebo
controlled dose escalation trial of mesenchymal stromal cells (MSCs) for standard of care refractory lupus. This
Phase II trial is based on promising data from open label trials in China and our own Phase I trial. Response
rates very from 65-75% in reports from China while we saw an SRI-4 response in 5/6 patients we treated with
umbilical cord derived MSCs. There are nine US centers participating in the MiSLE trial. Due to impact of the
COVID-19 pandemic, we were unable to reach our goal of 81 patients during a previously funded NIAID U01
grant that expired in March, 2023. Sixty two of the 81 patients are either randomized or treated as of now. We
were meeting our benchmarks of 1.98 patients per month until a COVID induced shutdown the trial for months.
We are recruiting patients at this rate again. In the trial to this point, we have had no safety signals, no issues
with infrastructure and patients meeting the primary study endpoint of the SRI-4. This is a critical trial to finish
to definitely show if there is a treatment effect of MSCs in lupus and to delineate the mechanisms by which MSCs
impact disease. In the Phase I trial we found marked impacts on extra follicular derived B cells. We are seeing
similar trends in preliminary analysis of the Phase II trial, though we are blinded as to treatment group. We have
introduced novel methods of multi-parameter statistical analysis to enhance detecting a treatment effect. In
mechanistic studies we will complete the analyses of B and T cell subsets, receptor diversity and epigenetics
over the course of the trial. Based on the development of new technology, we will perform CyTOF on
mononuclear cell populations, Cite Seq single cell analysis and plasma microbiome assays. These assays will
be performed at weeks 0, 4, 8 and 24. We have sufficient stored samples to perform the proposed assays. This
highly impactful trial will provide important insight into changes over time of key immune mediators of lupus,
perhaps allowing pre-treatment identification of patients most likely to respond to MSC treatment.

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Immune Function><Cellular Indexing of Transcriptomes and Epitopes by Sequencing><China><Clinical><Clinical Trials><Coronavirus Infectious Disease 2019><Data><Detection><Development><Disease><Disorder><Dorsum><Dose><Double-Blind Method><Double-Blind Study><Double-Blinded><Double-Masked Method><Double-Masked Study><Drugs><Enrollment><Epigenetic><Epigenetic Change><Epigenetic Mechanism><Epigenetic Process><FDA approved><Funding><Goals><Grant><Hand><Heterogeneity><Immune><Immune Mediators><Immune Mediators/Modulators><Immune Regulators><Immune mediated therapy><Immunes><Immunochemical Immunologic><Immunologic><Immunological><Immunologically><Immunologically Directed Therapy><Immunologics><Immunosuppressants><Immunosuppressive Agents><Immunosuppressive Therapy><Immunosuppressive drug><Immunosuppressive treatment><Immunotherapy><Immuran><Imuran><Imurel><Infrastructure><Intracellular Communication and Signaling><Laboratories><Lupus><Lupus Erythematosus Disseminatus><Mainland 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