iciHHV-6 in a Patient With Multisystem Inflammatory Syndrome in Children

Area of Science:

• Virology
• Immunology
• Pediatrics

Background:

• Multisystem inflammatory syndrome in children (MIS-C) is a severe, multi-organ condition following COVID-19, with unknown pathogenesis.
• Human herpesvirus 6 (HHV-6) is a common virus that can reactivate during inflammation and is linked to various organ diseases.
• Inherited chromosomally integrated HHV-6 (iciHHV-6) is present in germ cells and can be reactivated, potentially influencing immune responses.

Observation:

• A case of MIS-C was identified with an initial high viral load detected by HHV-6 DNA polymerase chain reaction.
• Further testing in this patient revealed the presence of inherited chromosomally integrated HHV-6 (iciHHV-6).

Findings:

• This case presents a potential association between iciHHV-6 and MIS-C.
• The findings suggest that iciHHV-6 reactivation might play a role in the pathogenesis of MIS-C.

Implications:

• Further research is needed to determine the prevalence of iciHHV-6 in MIS-C patients.
• Investigating the role of iciHHV-6 could offer new insights into MIS-C development and potential therapeutic targets.