Deep immunophenotyping reveals biomarkers of multisystemic inflammatory syndrome in children in a Latin American cohort.

BACKGROUND: Multisystemic inflammatory syndrome in children (MIS-C) is a life-threatening disease that occurs 2-5 weeks after severe acute respiratory syndrome coronavirus 2 exposure and is characterized by severe multisystemic inflammation. Early recognition of MIS-C is key to prognosis; therefore, establishing clinical and laboratory biomarkers that predict complications is urgently needed. OBJECTIVE: We characterized the immune response and clinical features of patients with acute MIS-C and determined biomarkers of disease in a cohort of 42 Latin American patients. METHODS: Immune characterization was performed using flow cytometry from peripheral mononuclear cells and severe acute respiratory syndrome coronavirus 2-specific humoral and cellular response was performed using flow cytometry, enzyme-linked immunospot, enzyme-linked immunosorbent assay, and neutralizing antibody assays. RESULTS: MIS-C is characterized by robust T-cell activation and cytokine storm. We uncovered that while C-X-C motif chemokine ligand (CXCL) 9, IL-10, CXCL8, CXCL10, IL-6, and IL-18 are significantly elevated in patients with shock, while CCL5 was increased in milder disease. Monocyte dysregulation was specifically associated with KD-like MIS-C. Interestingly, MIS-C patients show a natural killer cell degranulation defect that is persistent after 6 months of disease presentation, suggesting it could underlie disease susceptibility. Most MIS-C had gastrointestinal involvement, and higher levels of neopterin were identified in their stools, potentially representing a biomarker of intestinal inflammation in MIS-C. Severe acute respiratory syndrome coronavirus 2-specific cellular response and neutralizing antibodies were identifiable in convalescent MIS-C patients, suggesting sustained immunity. CONCLUSION: Clinical characterization and comprehensive immunophenotyping of Chilean MIS-C cohort provide valuable insights in understanding immune dysregulation in MIS-C and identify relevant biomarkers of disease that could be used to predict severity and organ involvement.

[Student patient relationship from the patient's point of view]. / Relación estudiante-enfermo: visión del paciente.

BACKGROUND: Patients are becoming increasingly active in their relationship with medical professionals. Their relationship with medical students needing to learn clinical skills, may be specially problematic if patients are not willing to accept their involvement in the medical team. AIM: To examine patient's perceptions of their relation with medical students and their agreement to let students be part of the treating team. MATERIAL AND METHODS: Qualitative study using taped semi-structured interviews addressed to inpatients from one public and one private hospital in Chile. RESULTS: Both groups of patients acknowledged that students dedicated more time to them, but they expressed their preference to limit student's participation to clinical history taking and physical examination. They also expected them to be observers rather than actors. Patients from the private hospital emphasized that only one student per instructor should participate in their care. Patients from the public hospital were more compliant about student's participation. The right to refuse students' involvement in their care was clearly known by all patients from the private system and by most patients from the public hospital. CONCLUSIONS: Patients in Chilean public and private hospitals were in general positive regarding student's participation in their care. Students' clinical practice ought to strictly respect patients's rights, and patients should be considered volunteers who generously agree to cooperate with the education of medical students.