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| Content Provider | PubMed Central |
|---|---|
| Author | Okano, Tetsuya Masahiro, Seike Kuribayashi, Hidehiko Soeno, Chie Ishii, Takeo Kida, Kozui Gemma, Akihiko |
| Copyright Year | 2016 |
| Abstract | To date, a number of potential biomarkers for lung squamous cell cancer (SCC) have been identified; however, sensitive biomarkers are currently lacking to detect early stage SCC due to low sensitivity and specificity. In the present study, we compared the 7 serum proteomic profiles of 11 SCC patients, 7 chronic obstructive pulmonary disease (COPD) patients and 7 healthy smokers as controls to identify potential serum biomarkers associated with SCC and COPD. Two-dimensional difference gel electrophoresis (2D-DIGE) and mass-spectrometric analysis (MS) using an affinity column revealed two candidate proteins, haptoglobin (HP) and apolipoprotein 4, as biomarkers of SCC, and α-1-antichymotrypsin as a marker of COPD. The iTRAQ technique was also used to identify SCC-specific peptides. HP protein expression was significantly higher in SCC patients than in COPD patients. Furthermore, two HP protein peptides showed significantly higher serum levels in SCC patients than in COPD patients. We established novel polyclonal antibodies for the two HP peptides and subsequently a sandwich enzyme-linked immunosorbent assay (ELISA) for the quantification of these specific peptides in patient and control sera. The sensitivity of detection by ELISA of one HP peptide (HP216) was 70% of SCC patients, 40% of COPDs patients and 13% of healthy controls. We also measured CYFRA, a cytokeratin fragment clinically used as an SCC tumor marker, in all the 28 cases and found CYFRA was detected in only seven SCC cases. However, when the measurement of HP216 was combined with that of CYFRA, 100% (10 of 10 patients) of SCC cases were detected. Our proteomic profiling demonstrates that the SCC-specific HP peptide HP216 may potentially be used as a diagnostic biomarker for SCC. |
| Related Links | http://dx.doi.org/10.3892/ijo.2016.3330 |
| Ending Page | 952 |
| Page Count | 8 |
| Starting Page | 945 |
| File Format | |
| ISSN | 17912423 |
| e-ISSN | 17912423 |
| Journal | International Journal of Oncology |
| Issue Number | 3 |
| Volume Number | 48 |
| Language | English |
| Publisher | D.A. Spandidos |
| Publisher Date | 2016-01-11 |
| Access Restriction | Open |
| Rights Holder | D.A. Spandidos |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cancer Research Oncology |
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