Genetic analysis of tumor necrosis factor-α (TNF-α) G-308A and Saitohin Q7R polymorphisms with Alzheimer's disease

Binbin Wang, Sirui Zhou, Ze Yang, Yan chen Xie, Jing Wang, Peng Zhang, Zeping Lv, Chenguang Zheng, Xu Ma

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Neuroinflammation and abnormal phosphorylation of TAU proteins have been implicated in the etiology of Alzheimer's disease (AD). Several studies have suggested the G-308A promoter polymorphism in one of the proinflammatory cytokine genes tumor necrosis factor-α (TNF-α) encoding TNF-α may be associated with AD pathogenesis. Association between the Q7R polymorphism in saitohin (STH), a gene nested within the intron of the Tau gene, has also been reported. To determine whether these two polymorphisms contribute to the risk for late-onset AD (LOAD) in Chinese, we have investigated 207 sporadic LOAD patients and 222 healthy controls. The associations of the AA genotype and A-allele with LOAD (χ2 = 8.74, df = 1, P = 0.0031, and χ2 = 4.47, df = 1, P = 0.035) were found. After stratifying by apolipoprotein E allele 4 (APOE ε4) status, increased LOAD risks associated with the AA genotype and A-allele only in the APOE ε4 non-carriers (χ2 = 9.21, df = 1, P = 0.002; χ2 = 10.02, df = 1, P = 0.0015) were seen. These results suggested that the TNF-α gene G-308A polymorphism might be a risk factor for LOAD and dependent on APOE ε4 status in Chinese. Homozygous Q/Q of STH Q7R polymorphism was the only one genotype found in either LOAD group or controls. No R allele was detected in LOAD and control groups. The extremely rare frequency of the ancestral R allele differs sharply from that observed in studies in the Caucasian population, suggesting obvious ethnic differences.

Original languageEnglish (US)
Pages (from-to)148-151
Number of pages4
JournalJournal of the Neurological Sciences
Volume270
Issue number1-2
DOIs
StatePublished - Jul 15 2008
Externally publishedYes

Keywords

  • APOE ε4;TNF-α
  • Case-control study
  • Chinese
  • Late-onset Alzheimer's disease
  • STH

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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