Peptidome profiling of human serum of uveal melanoma patients based on magnetic bead fractionation and mass spectrometry  

作　　者：Xiang-Yu Shi Qing Li Wen-Bin Wei Li-Ming Tao Xiang-Yu Shi;Qing Li;Wen-Bin Wei;Li-Ming Tao(Department of Ophthalmology,the Second Hospital Affiliated to Anhui Medical University;Beijing Tongren Eye Center,Beijing Tongren Hospital,Capital Medical University,Beijing Ophthalmology & Visual Science Key Laboratory)

机构地区：[1]Department of Ophthalmology, the Second Hospital Affiliated to Anhui Medical University, Hefei 230601, Anhui Province, China [2]Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology ＆ Visual Science Key Laboratory, Beijing 100730, China

出　　处：《International Journal of Ophthalmology(English edition)》2017年第6期939-947,共9页国际眼科杂志（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.81570891;No.81272981);the Beijing Natural Science Foundation(No.7151003);Advanced Health Care Professionals Development Project of Beijing Municipal Health Bureau(No.2014-2-003);Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding Support(No.ZYLX201307)

摘　　要：AIM： To find new biomarkers for uveal melanoma （UM） by analyzing the serum peptidome profile. METHODS： Proteomic spectra in patients with UM before and after operation were analyzed and compared with those of healthy controls. Magnetic affinity beads were used to capture serum peptides and matrix-assisted laser desorption/ionization time-of-flight （MALDI-TOF） mass spectrometer were used to compile serum peptide profiles. RESULTS： A panel of 49 peptides were differentially expressed between UM patients and controls, of which 33 peptides were of higher intensities in patient group and 16 peptides were of higher intensities in control group. Based on combined use of these potential markers, peptides with mean molecular masses of 1467 and 9289.0 Da provide high sensitivity （83.3%）, specificity （100%） and accuracy rate （93.0%） together to differentiate melanoma patients from healthy controls. At the time point of 6mo postoperatively, the levels of many peptides differentially expressed before surgery showed no more statistical difference between the patients and the control group. Fibrinogen o-chain precursors were identified as potential UM markers. CONCLUSION： We have shown that a convenient and fast proteomic technique, affinity bead separation and MALDI- TOF analysis combined with bioinformatic software, facilitates the identification of novel biomarkers for UM.AIM： To find new biomarkers for uveal melanoma （UM） by analyzing the serum peptidome profile. METHODS： Proteomic spectra in patients with UM before and after operation were analyzed and compared with those of healthy controls. Magnetic affinity beads were used to capture serum peptides and matrix-assisted laser desorption/ionization time-of-flight （MALDI-TOF） mass spectrometer were used to compile serum peptide profiles. RESULTS： A panel of 49 peptides were differentially expressed between UM patients and controls, of which 33 peptides were of higher intensities in patient group and 16 peptides were of higher intensities in control group. Based on combined use of these potential markers, peptides with mean molecular masses of 1467 and 9289.0 Da provide high sensitivity （83.3%）, specificity （100%） and accuracy rate （93.0%） together to differentiate melanoma patients from healthy controls. At the time point of 6mo postoperatively, the levels of many peptides differentially expressed before surgery showed no more statistical difference between the patients and the control group. Fibrinogen o-chain precursors were identified as potential UM markers. CONCLUSION： We have shown that a convenient and fast proteomic technique, affinity bead separation and MALDI- TOF analysis combined with bioinformatic software, facilitates the identification of novel biomarkers for UM.

关 键 词：uveal melanoma protein biomarker peptidomeprofile magnetic bead fractionation mass spectrometry 

分 类 号：R739.7[医药卫生—肿瘤]