title: Comparison of tumor markers using different detection devices.
abstract: BACKGROUND
  With the development of proteomics, tumor markers have attracted increasing attention for the early diagnosis and treatment of lung cancer. As biochip technology and nanotechnology continues to grow, rapid and highly sensitive joint detection of multi-tumor markers has become possible.
  
  
  METHODS
  Eighty-six patients with lung cancer and 42 healthy controls were recruited for this study. Based on analysis of the detection results, we plotted four standard tumor marker graphs, and compared the results of the highly sensitive nanogold probe and protein chip detection with the results of electrochemiluminescence immunoassay and Dickkopf-1 (DKK1) detection used in the clinic. We then analyzed the relationship between the detection results and our clinical data.
  
  
  RESULTS
  Four plotted standard protein graphs all had stages with sound linear relationships. It was found in a correlation analysis of the detection results that overall the two methods showed consistency.
  
  
  CONCLUSIONS
  We developed a detection method for ultra-trace protein that can detect four tumor markers, namely carcinoembryonic antigen, cytokeratin-19 fragments, neuron-specific enolase, and DKK1 in a highly sensitive way within 1.5 hours by magnifying the signal of nanogold deposition based on protein chips and nanogold probes. By comparing the results from the different detection devices, we have developed an experimental basis for detection of tumor markers in the clinic.
authors.affiliation: Nuclear Medicine, Putuo District Center Hospital, Shanghai, People's Republic of China.
authors.forename: Rong
authors.initials: R
authors.lastname: Tao
authors.affiliation: Nuclear Medicine, Putuo District Center Hospital, Shanghai, People's Republic of China.
authors.forename: Shaohua
authors.initials: S
authors.lastname: Tu
authors.affiliation: Nuclear Medicine, Putuo District Center Hospital, Shanghai, People's Republic of China.
authors.forename: Chong
authors.initials: C
authors.lastname: Liu
authors.affiliation: Nuclear Medicine, Putuo District Center Hospital, Shanghai, People's Republic of China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Nuclear Medicine, Putuo District Center Hospital, Shanghai, People's Republic of China.
authors.forename: Min
authors.initials: M
authors.lastname: Zhu
authors.affiliation: Nuclear Medicine, Putuo District Center Hospital, Shanghai, People's Republic of China.
authors.forename: Jiangfan
authors.initials: J
authors.lastname: Shen
keywords: electrochemiluminescence immunoassay; lung cancer; nanotechnology; tumor markers