Aberrant methylation of N-methyl-D-aspartate receptor type 2B (NMDAR2B) in non-small cell carcinoma

Hajime Tamura, Makoto Suzuki, Yasumitsu Moriya, Hidehisa Hoshino, Tatsuro Okamoto, Shigetoshi Yoshida, Ichiro Yoshino

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Background: N-methyl-D-aspartate receptors (NMDAR) act as tumor suppressors of digestive malignancies. The expression and genetic methylation patterns of NMDAR2B in non-small cell lung cancer (NSCLC) are unknown.Methods: The relationship between gene methylation and expression of NMDAR2B was analyzed in NSCLC cell lines (N = 9) and clinical tissues (N = 216). The cell lines were studied using RT-PCR and 5-aza-2'-deoxycytidine treatment, while the clinical tissues were examined by methylation specific real-time quantitative PCR and immunohistochemistry. Retrospective investigation of patient records was used to determine the clinical significance of NMDAR2B methylation.Results: NMDAR2B was silenced in five of the nine cell lines; 5-aza-2'-deoxycytidine treatment restored expression, and was inversely correlated with methylation. Aberrant methylation of NMDAR2B, detected in 61% (131/216) of clinical NSCLC tissues, was inversely correlated with the status of protein expression in 20 randomly examined tumors. Aberrant methylation was not associated with clinical factors such as gender, age, histological type, or TNM stage. However, aberrant methylation was an independent prognostic factor in squamous cell carcinoma cases.Conclusions: Aberrant methylation of the NMDAR2B gene is a common event in NSCLC. The prognosis was significantly better for cases of squamous cell carcinoma in which NMDAR2B was methylated. It may have different roles in different histological types.

Original languageEnglish
Article number220
JournalBMC Cancer
Volume11
DOIs
Publication statusPublished - Jun 5 2011

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N-Methyl-D-Aspartate Receptors
Methylation
Carcinoma
decitabine
Non-Small Cell Lung Carcinoma
Cell Line
Squamous Cell Carcinoma
Neoplasms
Real-Time Polymerase Chain Reaction
Immunohistochemistry
Gene Expression
Polymerase Chain Reaction
Therapeutics
Genes

All Science Journal Classification (ASJC) codes

  • Genetics
  • Oncology
  • Cancer Research

Cite this

Tamura, H., Suzuki, M., Moriya, Y., Hoshino, H., Okamoto, T., Yoshida, S., & Yoshino, I. (2011). Aberrant methylation of N-methyl-D-aspartate receptor type 2B (NMDAR2B) in non-small cell carcinoma. BMC Cancer, 11, [220]. https://doi.org/10.1186/1471-2407-11-220

Aberrant methylation of N-methyl-D-aspartate receptor type 2B (NMDAR2B) in non-small cell carcinoma. / Tamura, Hajime; Suzuki, Makoto; Moriya, Yasumitsu; Hoshino, Hidehisa; Okamoto, Tatsuro; Yoshida, Shigetoshi; Yoshino, Ichiro.

In: BMC Cancer, Vol. 11, 220, 05.06.2011.

Research output: Contribution to journalArticle

Tamura, H, Suzuki, M, Moriya, Y, Hoshino, H, Okamoto, T, Yoshida, S & Yoshino, I 2011, 'Aberrant methylation of N-methyl-D-aspartate receptor type 2B (NMDAR2B) in non-small cell carcinoma', BMC Cancer, vol. 11, 220. https://doi.org/10.1186/1471-2407-11-220
Tamura, Hajime ; Suzuki, Makoto ; Moriya, Yasumitsu ; Hoshino, Hidehisa ; Okamoto, Tatsuro ; Yoshida, Shigetoshi ; Yoshino, Ichiro. / Aberrant methylation of N-methyl-D-aspartate receptor type 2B (NMDAR2B) in non-small cell carcinoma. In: BMC Cancer. 2011 ; Vol. 11.
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