Intermediate-size Expanded Access Program (EAP), Mesenchymal Stromal Cells (MSC) for Multisystem Inflammatory Syndrome in Children (MIS-C) Associated With Coronavirus Disease (COVID-19)
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ClinicalTrials.gov Identifier: NCT04456439 |
Expanded Access Status :
Available
First Posted : July 2, 2020
Last Update Posted : April 20, 2022
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Condition or disease | Intervention/treatment |
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Multisystem Inflammatory Syndrome in Children (MIS-C) Associated With Coronavirus Disease (COVID-19) | Biological: Remestemcel-L Drug: Hydrocortisone Drug: Diphenhydramine |
Study Type : | Expanded Access |
Expanded Access Type : | Intermediate-size Population |
Official Title: | Intermediate-size Expanded Access of Remestemcel-L, Human Mesenchymal Stromal Cells, for Multisystem Inflammatory Syndrome in Children (MIS-C) Associated With Coronavirus Disease (COVID-19) |

- Biological: Remestemcel-L
Participants may receive up to 2 infusions of 2 x 10^6 remestemcel-L within a 5-day period.
- Drug: Hydrocortisone
Participants who are not currently taking a corticosteroid will receive hydrocortisone, 0.5-1 milligram per kilogram (mg/kg), up to 50 mg IV, at least 30 minutes prior to the infusion of remestemcel-L.
- Drug: Diphenhydramine
Participants will receive diphenhydramine, 0.5-1 mg/kg, up to 50 mg IV, at least 30 minutes prior to the infusion of remestemcel-L.Other Name: Benadryl®

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Ages Eligible for Study: | 2 Months to 17 Years (Child) |
Sexes Eligible for Study: | All |
Inclusion Criteria
- 2 months to 17 years of age, inclusive
- Positive for current or recent SARS-CoV-2 (COVID-19) infection by real-time reverse transcription polymerase chain reaction (RT-PCR), serology, or antigen test; or COVID-19 exposure within the 4 weeks prior to the onset of symptoms AND no alternative plausible diagnoses
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Presenting with:
- Fever (>38.0°C or >100.4°F for ≥24 hours) or reporting subjective fever lasting ≥24 hours
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Laboratory evidence of inflammation with high sensitivity C-reactive protein (hsCRP) ≥4.0 milligrams per deciliter (mg/dL) and associated abnormalities of at least one of the following:
- elevated erythrocyte sedimentation rate (ESR)
- elevated fibrinogen
- elevated procalcitonin
- elevated d-dimer
- elevated ferritin
- elevated lactic dehydrogenase (LDH)
- elevated interleukin 6 (IL-6)
- elevated neutrophils
- reduced lymphocytes
- low albumin
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Clinically severe multisystem illness requiring hospitalization with evidence for cardiac involvement plus at least one other organ involvement (renal, respiratory, hematologic, gastrointestinal, dermatologic or neurological)
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Cardiac involvement is defined as reduced left ventricular ejection fraction (<55%) in addition to at least one of the following:
- increased troponin I,
- increased N-terminal pro-B-type natriuretic peptide (NT-proBNP) or BNP and/or
- echocardiographic and/or other imaging evidence of left anterior descending coronary artery (LAD) and/or right coronary artery (RCA) dilation associated with a z-score > 2.5
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- If on mechanical ventilation or ECMO, ≤72 hours post initiation of the respiratory support device
Exclusion Criteria
- Documented other microbial cause for MIS-C including bacterial sepsis, staphylococcal or streptococcal shock syndromes, or infections associated with myocarditis such as enterovirus. Of importance, waiting for results of these investigations should not delay initiation of remestemcel-L therapy.
- Females who are pregnant or lactating
- Body mass index (BMI) ≥40 kilograms per square meter (kg/m^2)
- Known hypersensitivity to dimethyl sulfoxide (DMSO) or to porcine or bovine proteins
- Aspartate aminotransferase/alanine transaminase (AST/ALT) ≥5x upper limit of normal (ULN)
- Creatinine clearance <30 mL/min
- Serum creatinine >2 mg/dL
- Any end-stage organ disease which in the opinion of the treating physician may possibly affect the safety of the remestemcel-L treatment.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04456439
Contact: Elizabeth Burke, ANP-C | 646-315-1725 | elizabeth.burke@mesoblast.com | |
Contact: Kenneth M. Borow, MD | 610-299-7855 | ken.borow@mesoblast.com |
Study Director: | Kenneth M. Borow, MD | Mesoblast, Inc. |
Responsible Party: | Mesoblast International Sàrl |
ClinicalTrials.gov Identifier: | NCT04456439 |
Other Study ID Numbers: |
MSB-MSC-MISC001 |
First Posted: | July 2, 2020 Key Record Dates |
Last Update Posted: | April 20, 2022 |
Last Verified: | April 2022 |
MIS-C COVID-19 MSC remestemcel-L |
Mesoblast mesenchymal cellular therapy cells |
COVID-19 Coronavirus Infections Syndrome Disease Pathologic Processes Respiratory Tract Infections Infections Pneumonia, Viral Pneumonia Virus Diseases Coronaviridae Infections Nidovirales Infections RNA Virus Infections Lung Diseases Respiratory Tract Diseases |
Diphenhydramine Promethazine Remestemcel-l Hydrocortisone Anti-Inflammatory Agents Sleep Aids, Pharmaceutical Hypnotics and Sedatives Central Nervous System Depressants Physiological Effects of Drugs Anesthetics, Local Anesthetics Sensory System Agents Peripheral Nervous System Agents Antiemetics Autonomic Agents |