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MIS-C Comparative Effectiveness Study

Multisystem Inflammatory Syndrome Therapies in Children (MISTIC) Comparative Effectiveness Study

Status
Completed
Phases
Phase 2Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04898231
Acronym
MISTIC
Enrollment
73
Registered
2021-05-24
Start date
2020-12-22
Completion date
2024-04-25
Last updated
2025-11-04

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

Conditions

Multisystem Inflammatory Syndrome-Children

Brief summary

In March 2020, children exposed to the virus that causes the COVID-19 illness, SARS-CoV-2, presented with fever and significant inflammation about a month after exposure to the virus. Some children were sick enough to require care in the intensive care unit for what came to be known as Multisystem Inflammatory Syndrome-Children (MIS-C).The clinical presentation shared many features with Kawasaki disease (KD), a self-limited inflammation that can cause ballooning of the arteries of the heart. Thus, physicians reached for many of the therapies used to treat children with KD. Despite the surge of COVID-19 cases and children continuing to present with MIS-C, there are no data that guide the choice of therapy. Thus, the investigators have designed a study to determine which combination of therapies is most effective in helping children with MIS-C recover quickly.

Detailed description

This study is a multi-site, randomized, pragmatic, comparative effectiveness study of children with MIS-C. The current standard of care is that all MIS-C patients are initially treated with IVIG and receive additional therapy if they are severely ill or do not improve clinically. This study design will randomize subjects who have received IVIG but clinically warrant further anti-inflammatory therapy to one of three treatment arms (infliximab, steroids or anakinra) and allow for re-randomization to one of the two remaining arms if clinically warranted.

Interventions

DRUGInfliximab

Infliximab will be administered as a single IV dose of 10 mg/kg over 2 hours.

DRUGAnakinra

Anakinra will be administered at a dose of 8 mg/kg/day IV or SQ with 100 mg every 6 hours as the max dose. This is discontinued with a taper during the hospitalization over 2-4 days once a patient is stable with significantly improved clinical course and laboratory profile.

DRUGMethylprednisolone

Methylprednisilone (steroids) will be administered as 2 mg/kg IV or orally divided every 12 hours. At the time of hospital discharge the patient will be given a steroid taper that will take at least 3 weeks to complete.

Sponsors

Children's Hospital of Michigan
CollaboratorOTHER
University of California, San Diego
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

This is a randomized trial of 3 treatment arms

Eligibility

Sex/Gender
ALL
Age
No minimum to 20 Years
Healthy volunteers
No

Inclusion criteria

1. An individual aged \<21 years presenting with 1. Fever (\>38.0°C for ≥24 hours; may be by subjective report) AND 2. Two or more of the following (from two different systems; e.g. one from cardiac and one from mucocutaneous): Cardiac * Hypotension * Shock * Arrhythmia * Tachycardia * Left ventricular ejection fraction \<55% * Valvulitis * Coronary artery enlargement (LAD or RCA Z-score ≥ 2.5) * Pericardial effusion Gastrointestinal * Diarrhea * Nausea/vomiting * Significant abdominal pain Immunologic * Lymphadenopathy (unilateral cervical or diffuse) Mucocutaneous * Bilateral conjunctival injection * Extremity swelling or erythema * Rash * Lip erythema/Strawberry tongue Neurologic * Altered mental status * Focal neurological deficits * Headache * Meningismus 3. Laboratory evidence of inflammation, including but not limited to, an elevated C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), fibrinogen, procalcitonin, D-dimer, ferritin, lactic acid dehydrogenase (LDH), neutrophilia, lymphopenia or hypoalbuminemia AND 4. No alternative plausible diagnoses based on clinical judgement AND 5. Positive for current or recent SARS-CoV-2 infection by RT-PCR, serology, or antigen test; or suspected COVID-19 exposure AND 6. Parent or legal guardian (or self if at least 18 years old) able and willing to provide informed consent and subject willing and able to provide assent when appropriate.

Exclusion criteria

1. Known immunodeficiency 2. Pre-existing medical condition that precludes receiving one or more of the study medications (e.g. TB, drug allergy to study medication).

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants Needing Additional Anti-inflammatory Therapy Within the First Week of First Randomization1 weekThe three arms of the study will be compared to see which initial randomization arm (infliximab, anakinra or steroids) has the lowest rate of additional anti-inflammatory therapy within the first week of first randomization.

Secondary

MeasureTime frameDescription
Number of Participants With Adverse Events6 weeksOf the three initial randomization arms (infliximab, steroids or anakinra), the rate of adverse events will be compared. The goal is to determine which arm has the lowest rate of adverse events. The AEs reported in the AE section include: All Cause, SAE and Others.

Countries

United States

Participant flow

Participants by arm

ArmCount
Infliximab
Infliximab will be administered as a single IV dose of 10 mg/kg over 2 hours. Infliximab: Infliximab will be administered as a single IV dose of 10 mg/kg over 2 hours.
25
Methylprednisilone (steroids)
Methylprednisilone (steroids) will be administered as 2 mg/kg IV or orally divided every 12 hours. At the time of hospital discharge the patient will be given a steroid taper that will take at least 3 weeks to complete. Methylprednisolone: Methylprednisilone (steroids) will be administered as 2 mg/kg IV or orally divided every 12 hours. At the time of hospital discharge the patient will be given a steroid taper that will take at least 3 weeks to complete.
24
Anakinra
Anakinra will be administered at a dose of 8 mg/kg/day IV or SQ with 100 mg every 6 hours as the max dose. This is discontinued with a taper during the hospitalization over 2-4 days once a patient is stable with significantly improved clinical course and laboratory profile. Anakinra: Anakinra will be administered at a dose of 8 mg/kg/day IV or SQ with 100 mg every 6 hours as the max dose. This is discontinued with a taper during the hospitalization over 2-4 days once a patient is stable with significantly improved clinical course and laboratory profile.
24
Total73

Baseline characteristics

CharacteristicMethylprednisilone (steroids)AnakinraTotalInfliximab
Age, Categorical
<=18 years
24 Participants24 Participants73 Participants25 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
0 Participants0 Participants0 Participants0 Participants
Age, Continuous7.95 years6.78 years7.64 years7.1 years
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants0 Participants2 Participants2 Participants
Race (NIH/OMB)
Black or African American
1 Participants4 Participants10 Participants5 Participants
Race (NIH/OMB)
More than one race
3 Participants1 Participants6 Participants2 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants1 Participants1 Participants
Race (NIH/OMB)
White
20 Participants19 Participants54 Participants15 Participants
Region of Enrollment
United States
24 participants24 participants73 participants25 participants
Sex: Female, Male
Female
11 Participants9 Participants28 Participants8 Participants
Sex: Female, Male
Male
13 Participants15 Participants45 Participants17 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 250 / 240 / 22
other
Total, other adverse events
0 / 2516 / 241 / 22
serious
Total, serious adverse events
0 / 250 / 240 / 22

Outcome results

Primary

Number of Participants Needing Additional Anti-inflammatory Therapy Within the First Week of First Randomization

The three arms of the study will be compared to see which initial randomization arm (infliximab, anakinra or steroids) has the lowest rate of additional anti-inflammatory therapy within the first week of first randomization.

Time frame: 1 week

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
InfliximabNumber of Participants Needing Additional Anti-inflammatory Therapy Within the First Week of First Randomization10 Participants
Methylprednisilone (steroids)Number of Participants Needing Additional Anti-inflammatory Therapy Within the First Week of First Randomization10 Participants
AnakinraNumber of Participants Needing Additional Anti-inflammatory Therapy Within the First Week of First Randomization14 Participants
Secondary

Number of Participants With Adverse Events

Of the three initial randomization arms (infliximab, steroids or anakinra), the rate of adverse events will be compared. The goal is to determine which arm has the lowest rate of adverse events. The AEs reported in the AE section include: All Cause, SAE and Others.

Time frame: 6 weeks

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
InfliximabNumber of Participants With Adverse Events0 Participants
Methylprednisilone (steroids)Number of Participants With Adverse Events16 Participants
AnakinraNumber of Participants With Adverse Events1 Participants

Source: ClinicalTrials.gov · Data processed: Feb 12, 2026