Downregulation of exhausted cytotoxic T cells in gene expression networks of multisystem inflammatory syndrome in children
Research article published in Nature communications (2021)
Abstract
Multisystem inflammatory syndrome in children (MIS-C) presents with fever, inflammation and pathology of multiple organs in individuals under 21 years of age in the weeks following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Although an autoimmune pathogenesis has been proposed, the genes, pathways and cell types causal to this new disease remain unknown. Here we perform RNA sequencing of blood from patients with MIS-C and controls to find disease-associated genes clustered in a co-expression module annotated to CD56dimCD57+ natural killer (NK) cells and exhausted CD8+ T cells. A similar transcriptome signature is replicated in an independent cohort of Kawasaki disease (KD), the related condition after which MIS-C was initially named. Probing a probabilistic causal network previously constructed from over 1,000 blood transcriptomes both validates the structure of this module and reveals nine key regulators, including TBX21, a central coordinator of exhausted CD8+ T cell differentiation. Together, this unbiased, transcriptome-wide survey implicates downregulation of NK cells and cytotoxic T cell exhaustion in the pathogenesis of MIS-C.
Abstract sourced from PubMed (NCBI) for the cited record. See the original publication for the authoritative version.
Resumen
Multisystem inflammatory syndrome in children (MIS-C) presents with fever, inflammation and pathology of multiple organs in individuals under 21 years of age in the weeks following severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection.
Por qué esto importa para la hirudoterapia
Este estudio realizó secuenciación de ARN en sangre de pacientes con síndrome inflamatorio multisistémico en niños (MIS-C) y controles, identificando un módulo de co-expresión anotado para células NK CD56dimCD57+ y linfocitos T CD8+ exhaustos, con TBX21 como regulador clave. Se encontró una firma transcriptómica similar en la enfermedad de Kawasaki. El estudio implica la regulación a la baja de las células NK y el agotamiento de los linfocitos T citotóxicos en la patogénesis del MIS-C. El artículo no contiene ninguna mención de sanguijuelas, hirudoterapia, hirudina ni de ninguna sustancia derivada de sanguijuela. No existe ninguna conexión defendible con el dominio de la hirudoterapia o del secretoma de la sanguijuela de ASH. El tema —inmunopatología inflamatoria postinfecciosa pediátrica— no está relacionado con la terapia medicinal con sanguijuelas, y este artículo no es relevante para la biblioteca de investigación de ASH.
Citación
Downregulation of exhausted cytotoxic T cells in gene expression networks of multisystem inflammatory syndrome in children
Beckmann ND et al. · Nature communications, 2021
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Añadido a la biblioteca ASH: May 27, 2026 · Última actualización del sitio: 18 de junio de 2026