title: A novel blood plasma analysis technique combining membrane electrophoresis with silver nanoparticle-based SERS spectroscopy for potential applications in noninvasive cancer detection.
abstract: Combining membrane electrophoresis with silver nanoparticle-based surface-enhanced Raman spectroscopy (SERS), we have developed a novel method for blood plasma analysis for cancer detection applications. In this method, total serum proteins are isolated from blood plasma by membrane electrophoresis and mixed with silver nanoparticles to perform SERS spectral analysis. The obtained SERS spectra present information-rich, fingerprint-type signatures of the biochemical constituents of whole proteins. We evaluated the utility of this method by analyzing blood plasma samples from patients with gastric cancer (n=31) and healthy volunteers (n=33). Principal components analysis of the spectra revealed that the data points for the two groups form distinct, completely separated clusters with no overlap. The gastric cancer group can be unambiguously distinguished from the normal group in this initial test-that is, with both diagnostic sensitivity and specificity of 100%. These results are very promising for developing a label-free, noninvasive clinical tool for cancer detection and screening.
authors.affiliation: Key Laboratory of Optoelectronic Science and Technology for Medicine, Ministry of Education, Fujian Normal University, Fuzhou, China.
authors.forename: Juqiang
authors.initials: J
authors.lastname: Lin
authors.forename: Rong
authors.initials: R
authors.lastname: Chen
authors.forename: Shangyuan
authors.initials: S
authors.lastname: Feng
authors.forename: Jianji
authors.initials: J
authors.lastname: Pan
authors.forename: Yongzeng
authors.initials: Y
authors.lastname: Li
authors.forename: Guannan
authors.initials: G
authors.lastname: Chen
authors.forename: Min
authors.initials: M
authors.lastname: Cheng
authors.forename: Zufang
authors.initials: Z
authors.lastname: Huang
authors.forename: Yun
authors.initials: Y
authors.lastname: Yu
authors.forename: Haishan
authors.initials: H
authors.lastname: Zeng
mesh_terms: D000328:Adult; D000368:Aged; D001774:Blood Chemical Analysis / Q000379:methods*; D016022:Case-Control Studies; D004586:Electrophoresis / Q000379:methods*; D006801:Humans; D008565:Membrane Proteins / Q000097:blood*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008875:Middle Aged; D009367:Neoplasm Staging; D012680:Sensitivity and Specificity; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods; D013274:Stomach Neoplasms / Q000097:blood / Q000175:diagnosis* / Q000473:pathology
chemical_list: D008565:Membrane Proteins; D012834:Silver