Human Transcriptome Array Analysis Identifies CDR2 as a Novel Suppressed Gene for Kawasaki Disease

Area of Science:

• Pediatric Rheumatology
• Immunology
• Genetics

Background:

• Kawasaki disease (KD) is a critical childhood vasculitis affecting coronary arteries.
• Previous research primarily focused on activated genes during the acute phase of KD.
• Understanding suppressed genes offers new avenues for KD research and potential prognostic markers.

Purpose of the Study:

• To identify suppressed genes in the acute stage of Kawasaki disease.
• To investigate the clinical significance and prognostic value of these suppressed genes.
• To explore the role of specific genes, like DDX24, in the development of coronary artery lesions (CAL).

Main Methods:

• Human transcriptome array (HTA) 2.0 analysis was performed on patients with KD, healthy controls (HC), and febrile controls (FC).
• Gene expression was validated using quantitative reverse transcription PCR (qRT-PCR).
• Analysis included 18 KD patients and 18 HC for HTA, and 31 KD patients and 39 controls for qRT-PCR.

Main Results:

• HTA 2.0 identified 461 upregulated and 99 suppressed genes in KD patients.
• BCL11B, DUSP2, DDX24, and CDR2 were the most downregulated genes, with expression increasing after IVIG treatment.
• CDR2 mRNA expression correlated well with HTA 2.0 results, and higher DDX24 mRNA was observed in KD patients with CAL post-IVIG.

Conclusions:

• This study highlights novel suppressed genes, particularly CDR2, in Kawasaki disease.
• DDX24 gene expression is associated with the formation of coronary artery lesions (CAL) in KD patients.
• These findings contribute to a deeper understanding of KD pathogenesis and may offer prognostic value.