Abstract:
PURPOSE:Recently, it was reported that expression of transglutaminase 2 plays an important role in doxorubicin/cisplatin resistance in breast and ovarian cancer. The aims of this study were to verify the role of transglutaminase 2 in cisplatin response in non-small cell lung cancer (NSCLC) and to study if transglutaminase 2 gene (TGM2) methylation can be a molecular marker for good response to cisplatin. METHODS:TGM2 promoter methylation was analyzed by sodium bisulfite sequencing. Cisplatin sensitivity was analyzed by treatment of cisplatin in NSCLC cell lines with/without TGM2 or TGM2 siRNA transfection. RESULTS:In one-third of NSCLC cell lines, TGase 2 gene (TGM2) was silenced by promoter methylation. The TGM2 promoter-methylated cell lines (HCC-95 and HCC-1588) showed relatively higher sensitivity to cisplatin than the TGM2-expressing cell lines (NCI-H1299 and HCC-1195). Down-regulation and over-expression of TGM2 in those NSCLC cells also suggested a positive correlation of cisplatin sensitivity and TGM2 inhibition. With doxorubicin, the relationship was quite similar. CONCLUSIONS:We showed that good responders of cisplatin in NSCLC could be identified by the promoter methylation of TGM2 and that TGase 2 inhibition appears to be an effective cisplatin-sensitizing modality in NSCLC.
journal_name
J Cancer Res Clin Oncoljournal_title
Journal of cancer research and clinical oncologyauthors
Park KS,Kim HK,Lee JH,Choi YB,Park SY,Yang SH,Kim SY,Hong KMdoi
10.1007/s00432-009-0681-6subject
Has Abstractpub_date
2010-04-01 00:00:00pages
493-502issue
4eissn
0171-5216issn
1432-1335journal_volume
136pub_type
杂志文章abstract:PURPOSE:We examined the influence of OGG1 c.977C>G (rs1052133), APEX1 c.444T>G (rs1130409), XRCC1 c.-77T>C (rs3213245), c.580C>T (rs1799782), c.839G>A (rs25489) and c.1196G>A (rs25487) single-nucleotide polymorphisms (SNPs), involved in base-excision repair (BER) pathway, on oropharyngeal squamous cell carcinoma (OPSCC...
journal_title:Journal of cancer research and clinical oncology
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journal_title:Journal of cancer research and clinical oncology
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journal_title:Journal of cancer research and clinical oncology
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journal_title:Journal of cancer research and clinical oncology
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