Absence of common polymorphisms of toll like receptor 4 (TLR4): Asp299Gly, Thr399Ile in patients with gastroduodenal diseases in Japan

Tomomitsu Tahara, Tomiyasu Arisawa, Tomoyuki Shibata, Ichiro Hirata, Hiroshi Nakano

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26 Citations (Scopus)


Host genetic factors may play a key role in determining the long-term outcome of the Helicobacter pylori (H. pylori) infection. Toll-like receptor 4 (TLR4) mediated recognition of lipo-polysaccharide (LPS) is required for efficient recognition of gram-negative bacterial infections. The aim of this study is to investigate the effects of common polymorphisms of TLR4 Asp299Gly, Thr399Ile in patients with gastroduodenal diseases in Japanese population. The study was performed in 149 gastric cancer (GC) cases (mean age 64.0 ± 12.4, M:F = 109:40) and 94 patients without evidence of GC (mean age 64.1 ± 12.3, M:F = 65:25) as the control group. TLR4 Asp299Gly, Thr399Ile were determined by Polymerase chain reaction-length of polymorphisms (PCR-RFLP) in all the patients. Asp299Gly, Thr399Ile were not detected in all 243 patients enrolled in this study. In conclusion, our data suggest that TLR4 Asp299Gly, Thr399Ile are very rare in Japanese population and thus they may not be a important factor in determining the outcome of H. pylori infected individuals in Japan.

Original languageEnglish
Pages (from-to)62-65
Number of pages4
JournalJournal of Clinical Biochemistry and Nutrition
Issue number1
Publication statusPublished - 01-01-2007


All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Nutrition and Dietetics
  • Clinical Biochemistry

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