Association of mannose-binding lectin gene polymorphisms with Kawasaki disease in the Japanese
Satoshi Sato1, Hisashi Kawashima, Yasuyo Kashiwagi
1Department of Pediatrics, Tokyo Medical University, Tokyo, Japan. sato115@tokyo-med.ac.jp
Insights
Mutations in the mannose-binding lectin (MBL) gene, particularly at codon 54, may be linked to Kawasaki disease (KD) in children. This suggests a potential role for MBL gene variations in KD pathogenesis.
Area of Science:
- Immunology
- Genetics
- Pediatrics
Background:
- Kawasaki disease (KD) is a childhood systemic vasculitis with unknown etiology.
- Infections are suspected to play a role in KD pathogenesis.
- Human mannose-binding lectin (MBL) is crucial for the innate immune system in children.
Purpose of the Study:
- To investigate the association between MBL gene polymorphisms and Kawasaki disease occurrence.
- To analyze MBL gene variants in the Japanese population.
Main Methods:
- Genotyping of MBL gene mutations (codons 52, 54, 57) and promoter variants.
- Analysis of MBL genotype frequencies in 45 KD patients and a control group.
Main Results:
- Significantly higher frequencies of MBL codon-54 heterozygote (GGC/GAC) and promoter variants were observed in KD patients compared to controls (P < 0.05).
- No significant differences in codon 52 or 57 polymorphisms were found between groups.
Conclusions:
- MBL gene mutations, especially at codon 54, may be associated with the trigger of Kawasaki disease pathogenesis.
- Further research into MBL gene variations could elucidate KD etiology.
Objective:
Kawasaki disease (KD) is a systemic vasculitis in childhood; its etiology is unknown. The possibility that KD is an infectious disease has been discussed and investigated for decades, in light of the implication that infections are involved in the pathogenesis of KD. Young children rely on their innate immune system for protection against virus and micro-organisms. Human mannose binding lectin (MBL) is a C-type serum lectin synthesized by the liver as an acute phase protein and it plays an important role in the innate immune system. Here, we investigate the relationship between the MBL gene polymorphisms and the occurrence of KD in the Japanese population.
Method:
The frequencies of the genotypes, defined as mutations in codons 52, 54 and 57, and the functional promoter variants of the MBL were determined in 45 patients with KD.
Results:
The MBL codon-54 polymorphism frequency of heterozygote (GGC/GAC) and promoter variants were significantly higher in the KD group than that in the control group (P < 0.05). Neither group showed codon 52 nor 57 polymorphisms.
Conclusion:
It is possible that mutations of the MBL gene might be related to the trigger of the pathogenesis of Kawasaki disease.
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