Vitamin D may influence disease course in PIMS-TS/MIS-C: An observational cohort study

Area of Science:

• Pediatric rheumatology
• Infectious diseases
• Critical care medicine

Background:

• Pediatric multisystem inflammatory syndrome temporally associated with SARS-CoV-2 (PIMS-TS) shares features with Kawasaki disease but has poorly understood biomarker correlations.
• Transient cardiac dysfunction is common in PIMS-TS, necessitating better understanding of disease severity markers.

Purpose of the Study:

• To investigate the relationship between biomarkers, disease severity, and treatment outcomes in pediatric patients with PIMS-TS.
• To evaluate the efficacy of methylprednisolone in managing PIMS-TS and its impact on inflammatory markers.

Main Methods:

• Retrospective review of 63 PIMS-TS patients treated between May 2020 and May 2022.
• Comparison of patients requiring vasoactive medications versus those who did not.
• Analysis of demographic data, clinical features, biochemical markers (including NT-pro-BNP and Vitamin D), treatments, and outcomes.

Main Results:

• Patients needing vasoactive medications showed significantly higher peak NT-pro-BNP and longer hospital stays.
• Lower Vitamin D levels correlated with higher peak C-reactive protein (CRP) and longer duration of vasoactive medication use.
• Methylprednisolone treatment led to a faster reduction in CRP compared to IVIg alone or no immunomodulatory treatment, with no coronary artery aneurysms observed.

Conclusions:

• Early methylprednisolone administration effectively suppressed CRP in PIMS-TS patients without causing coronary aneurysms.
• A significant relationship exists between Vitamin D levels, SARS-CoV-2 antibody titers, inflammatory biomarkers, and the need for vasoactive medications in PIMS-TS.