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Single-Cell Transcriptome Reveals Potential Mechanisms for Coronary Artery Lesions in Kawasaki Disease
Yeshi Chen1, Minna Yang1, Mingming Zhang2
1Capital Institute of Pediatrics-Peking University Teaching Hospital, Beijing, China (Y.C., M.Y., R.S., X.L.).
Insights
Kawasaki disease (KD) with coronary artery lesions (CALs) involves immune cell shifts and cytokine storms, particularly involving monocytes and megakaryocytes. This research identifies potential therapeutic targets for KD complications.
Area of Science:
- Immunology
- Pediatrics
- Genomics
Background:
- Coronary artery lesions (CALs) are a major complication of Kawasaki disease (KD).
- The immunological mechanisms driving CAL development in KD are not fully understood.
Purpose of the Study:
- To elucidate the immunologic mechanisms underlying CAL development in Kawasaki disease.
- To identify immune cell profiles and molecular pathways associated with CALs in KD patients.
Main Methods:
- Single-cell transcriptome analysis of peripheral blood mononuclear cells from 16 children (KD with CALs, KD without CALs, healthy controls, febrile controls).
Main Results:
- KD alters peripheral blood mononuclear cell proportions, showing increased inflammatory cells (megakaryocytes, monocytes) and decreased lymphocytes, suggesting lymphopenia.
- Patients with KD and CALs exhibit an inflammatory cytokine storm driven by TNFSF13B, CXCL16, TNFSF10, and IL1RN, primarily from monocytes and megakaryocytes.
- Myeloid cells, especially in KD with CALs, contribute to vascular injury and immune cell recruitment, with unique immune profiles including activated complement and cytotoxic CD8+ T cells.
Conclusions:
- This study offers a comprehensive view of immune cell roles and cytokine storms in KD-associated CAL development.
- Identifies potential novel therapeutic targets for managing CALs in Kawasaki disease.
Background:
Coronary artery lesions (CALs) are the most common and major complication of Kawasaki disease (KD) in developed countries. However, the underlying immunologic mechanisms of CAL development in KD remain unclear.
Methods:
Here, we conducted single-cell transcriptome analyses of 212 210 peripheral blood mononuclear cells collected from a cross-sectional cohort of 16 children, including 4 patients with KD with CALs, 5 patients with KD without CALs, 4 healthy controls, and 3 febrile controls.
Results:
KD altered the proportion of peripheral blood mononuclear cells, including an increasing trend in inflammatory cells (megakaryocytes and monocytes) and a decreasing trend in lymphocytes (eg, CD4+ T, CD8+ T, mucosal-associated invariant T, natural killer, and γδ T cells), highlighting the potential presence of lymphopenia phenomenon in KD. Our data indicated the presence of inflammatory cytokine storm in patients with KD with CALs, caused by systemic upregulation of TNFSF13B (tumor necrosis factor superfamily member 13b), CXCL16 (C-X-C motif chemokine ligand 16), TNFSF10 (tumor necrosis factor superfamily member 10), and IL1RN (interleukin 1 receptor antagonist), mainly produced by monocytes (especially for the Mono_CD14-CD16 cluster) and megakaryocytes. We also found that myeloid cells of patients with KD, particularly in those with CALs, might play a role in vascular injury (eg, increased MMP [matrix metalloproteinase] 9, MMP17, and MMP25) and immune cell recruitment. The immune landscape of patients with KD with CALs was featured by lower exhaustion levels in natural killer cells, a high cytotoxic state in the CD8_Pro cluster, and activation of the complement system in monocytes. Additionally, the activation of B cells was more pronounced in the early stage of KD.
Conclusions:
Collectively, this study provides a comprehensive understanding of the roles of various immune cells and inflammatory cytokine storms in the development of CALs in KD and offers a valuable resource for identifying novel therapeutic targets for patients with KD with CALs.
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