Susceptibility for ischemic stroke in four constitution medicine is associated with polymorphisms of FCGR2A and IL1RN genes.

OBJECTIVES: To determine the association between Four Constitutional classification and Fc fragment of IgG, low affinity of IIa, receptor (FCGR2A) and interleukin 1 receptor antagonist (IL1RN) in Korean ischemic stroke patients.
METHODS: We classified the Four Constitutional types in ischemic stroke patients (n=162) and healthy control subjects (n=135), and genotyped FCGR2A and IL1RN polymorphisms using direct DNA sequencing and polymerase chain reaction (PCR) methods.
RESULTS: In the IL1RN polymorphisms, the IL1RN*1/IL1RN*2 genotype (OR=5.80, p=0.0142), and in the FCGR2A polymorphisms, the rs7535475 (OR=0.58, p=0.0218) and rs7512140 (OR=0.09, p=0.0335), were significantly associated with ischemic stroke. The prevalence of IL1RN*1/IL1RN*2 genotype of IL1RN and rs7535475 of FCGR2A in greater Yin person ischemic stroke patients were different from greater Yin person healthy controls (OR=18.97, p=0.0063; OR=0.38, p=0.0045). DISCUSSION: These results suggest that IL1RN*1/IL1RN*2 genotype in greater Yin person might be associated with increased risk of ischemic stroke, and rs7535475 of FCGR2A might be associated with decreased risk of ischemic stroke. Furthermore, this relationship could provide the basis for a new approach in investigating the etiology of ischemic stroke.