Article

Association of toll-like receptor 2 polymorphisms with National Institute of Health Stroke Scale scores of ischemic stroke patients.

Kohwang Medical Research Institute, School of Medicine, Kyung Hee University, Seoul, South Korea.
Journal of Molecular Neuroscience (impact factor: 2.5). 09/2011; 46(3):536-40. DOI:10.1007/s12031-011-9640-1
Source: PubMed

ABSTRACT Toll-like receptor 2 (TLR2) has been shown to have an important role in the postischemic inflammatory response and to contribute to ischemic brain damage. In this study, we investigated whether coding region single nucleotide polymorphisms (SNPs) of the TLR2 gene were associated with ischemic stroke (IS) and with clinical phenotypes in IS patients. We genotyped two SNPs (rs3804099 [Asn199Asn] and rs3804100 [Ser450Ser]) using direct sequencing in 202 IS patients and 291 control subjects. No SNPs of the TLR2 gene were found to be associated with IS. However, in analysis of clinical phenotypes, we found that rs3804099 was associated with the National Institute of Health Stroke Scale (NIHSS) scores of IS patients in codominant (TC vs. TT, p = 0.0005; CC vs. TT, p = 0.0007) and dominant models (TC/CC vs. TT, p = 0.0001). Also, rs3804100 revealed significant association in codominant (TC vs. TT, p = 0.0002; CC vs. TT, p = 0.008) and dominant models (TC/CC vs. TT, p < 0.0001). In allele frequency analysis, we also found that the C alleles of rs3804099 and rs3804100 were associated with higher NIHSS scores (p = 0.0003 in rs3804099; p = 0.0001 in rs3804100). Our results suggest that TLR2 may be related to severe IS.

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  • Article: Association between ABCB1 Polymorphisms and Ischemic Stroke in Korean Population.
    Young-Ock Kim, Seung-Yu Kim, Dong Hwan Yun, Sang-Won Lee
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    ABSTRACT: Neuronal expression of ATP-binding cassette, sub-family B (MDR/TAP), member 1 (ABCB1) has been demonstrated after brain ischemia. To investigate whether ABCB1 polymorphisms are associated with the development, risk factors (hypertension, dyslipidemia, and diabetes mellitus), severity (National Institutes of Health Stroke Scale, NIHSS), and sequelae (Modified Barthel Index, MBI) of ischemic stroke (IS), four single nucleotide polymorphisms (SNPs) of the ABCB1 gene [rs4148727, promoter, -154T>C; rs3213619, 5'-untranslation region (5'UTR), -129T>C); rs1128503, synonymous, Gly412 (C>T); rs3842, 3'UTR, A>G] were analyzed in 121 IS patients and 291 control subjects. SNPStats and SPSS 18.0 were used to obtain odds ratios (OR), 95% confidence intervals (CI), and p values. Multiple logistic regression models (codominant1, codominant2, dominant, recessive, and log-additive models) were applied to analyze the genetic data. The rs3842 SNP was weakly associated with the development of IS (p=0.020 in codominant1 model and p=0.028 in dominant model). In the analysis of clinical phenotypes, ABCB1 polymorphisms were nominally associated with hypertension (rs3213619 and rs3842, p<0.05), dyslipidemia (rs1128503, p<0.05), diabetes (rs3842, p<0.05), and NIHSS (rs4148727, p<0.05). Interestingly, rs3842 showed statistically strong association between IS with hypertension and IS without hypertension (Fisher's exact p=0.003, OR=0.11, 95% CI=0.03-0.51 in recessive model). These results suggest that the ABCB1 gene may be associated with the development and clinical phenotypes of IS in Korean population.
    Experimental neurobiology. 12/2012; 21(4):164-71.
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Keywords

allele frequency analysis
 
C alleles
 
CC
 
clinical phenotypes
 
coding region single nucleotide polymorphisms
 
codominant
 
direct sequencing
 
dominant models
 
Health Stroke Scale
 
higher NIHSS scores
 
ischemic brain damage
 
National Institute
 
NIHSS
 
patients
 
postischemic inflammatory response
 
TC
 
TC/CC
 
TLR2
 
TLR2 gene
 
Toll-like receptor 2
 

Hae-Jeong Park