Correlation of tumor necrosis factor receptor superfamily 13B variation with sporadic intracranial aneurysm and clinical characteristics in Han Chinese populations

BACKGROUND： Inflammatory reaction correlates with sporadic intracranial aneurysm （IA）. Variation of tumor necrosis factor receptor superfamily 13B （TNFRSF13B）, an inflammatory mediator receptor, may associate with IA. OBJECTIVE： To explore the relationship between TNFRSF13B gene and sporadic IA, as well as the clinical characteristics of sporadic IA. DESIGN, TIME AND SETTING： Case-control study of genetic association was performed at the Experimental Technology Center of China Medical University from November 2006 to January 2008. PARTICIPANTS： A total of 367 patients with IA, confirmed by three-dimensional computed tomography angiography, magnetic resonance angiography, digital subtraction angiography, and neuro surgery, were admitted to the Department of Neurosurgery, First Affiliated Hospital of China Medical University from 2006 to 2007, and were selected as the case group. All patients were Han, with no family history of IA. In addition, a total of 396 non-lA patients were selected as control subjects. METHODS： Peripheral vein blood was harvested to extract whole blood genomic DNA. Genotyping and TNFRSF13B single nucleotide polymorphism （SNP） rs11078355 G〉A allele polymorphisms were determined by polymerase chain reaction-restriction fragment length polymorphism. The relationship of TNFRSF13B SNP rs11078355 G〉A polymorphisms to IA and IA clinical characteristics were analyzed using the chi-square and two-sided test. MAIN OUTCOME MEASURES： TNFRSF13B SNP rs11078355 G〉A genotype distribution. RESULTS： In the IA patients, TNFRSF13B SNP rs11078355 G〉A genotype frequency was significantly increased （X2 = 16.306, odds ratio = 1.881,95% confidence interval = 1.382 2.560, P 〈 0.001）. In IA patients aged 〉 65 years, the frequency of TNFRSF13B SNP rs11078355 GA ＋ AA genotype was significantly greater than the GG genotype （X2 = 26.604, odds ratio = 5.248, 95% confidence interval = 2.662 10.345, P 〈 0.001）. CONCLUSION： The TNFRSF13B gene may associate with sporadic IA in Han Chinese populations In elderly patients, allele A may be an independent risk factor for IA, in addition to senile diseases, such as hypertension and diabetes mellitus.

The relationship between tumor necrosis factor-a gene polymorphisms and acute severe pancreatitis

Objective To investigate the relationship between the presence of the TNF2 allele and plasma concentrations of tumor necrosis factor-α (TNFα) and soluble TNF receptor (sTNF-R) with the development of acute severe pancreatitis (ASP) and severe sepsis.Methods Genomic DNA was prepared from peripheral blood leukocytes. The TNF1 and TNF2 biallelic polymorphisms were identified by analyzing Ncol-digested DNA fragments obtained from PCR products. Plasma levels of TNFa and sTNF-R were measured by EASIA.Results The overall TNF2 allele frequency in ASP patients was comparable to that found in healthy volunteers (29. 2% vs. 29. 3% , P>0. 05). Severe sepsis occurred in 26 of 72 patients. Patients with severe sepsis showed a significantly higher prevalence of TNF2 than those without (46. 2% vs. 19.6%, P<0. 05). Plasma TNFα, sTNF-R Ⅰ, and sTNF-R Ⅱ levels were (36± 31) pg/ml, (5. 4± 3.5) ng/ml, and (11.2±7.8) ng/ml, respectively, in patients with severe sepsis, and (31 ±25) pg/ml, (4.6±3.8) ng/ml, and (8.8 ±6.6) ng/ml in non-severe sepsis subjects. Differences in TNF levels were not statistically significant between patients with ASP and control group (P > 0. 05). Moreover, there was no correlation between TNF2 allele frequency and TNFa levels [ (37 ±31) pg/ml vs. (31±25) pg/ml in TNF2 group and TNF, group, respectively, P>0. 05].Conclusions Our results suggest that there is no relationship between ASP and the TNF2 allele, but that the TNF2 allele is associated with a susceptibility to severe sepsis as a result of ASP.