目的应用液体蛋白芯片飞行时间质谱系统分析2型糖尿病性视网膜病变的血清蛋白质表达谱,寻找具有潜在诊断意义的血清标志物,以便于糖尿病视网膜病变的早期诊断。方法收集2型糖尿病但不伴糖尿病视网膜病变的患者24例,2型糖尿病合并糖尿病...目的应用液体蛋白芯片飞行时间质谱系统分析2型糖尿病性视网膜病变的血清蛋白质表达谱,寻找具有潜在诊断意义的血清标志物,以便于糖尿病视网膜病变的早期诊断。方法收集2型糖尿病但不伴糖尿病视网膜病变的患者24例,2型糖尿病合并糖尿病视网膜病变的患者21例血清样本,通过Clin Prot磁珠纯化、飞行时间质谱分析、Clin Pro Tools生物信息学方法研究糖尿病视网膜病变的血清蛋白表达谱。结果质荷比(m/z)为1945.53的蛋白峰能较好地鉴别糖尿病性视网膜病变。其识别率和预测能力分别为88.57%和82.08%。结论以液体蛋白芯片飞行时间质谱系统工具研究蛋白表达谱,筛选得到的质荷比为1945.53的蛋白可能为潜在的2型糖尿病性视网膜病变的血清标志物。展开更多
Background：We investigated possible biomarkers for endometriosis （EM） using the ClinProt technique and proteomics methods.Methods：We enrolled 50 patients with EM,34 with benign ovarian neoplasms and 40 healthy vol...Background：We investigated possible biomarkers for endometriosis （EM） using the ClinProt technique and proteomics methods.Methods：We enrolled 50 patients with EM,34 with benign ovarian neoplasms and 40 healthy volunteers in this study.Serum proteomic spectra were generated by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry （MS） combined with weak cationic exchange （WCX） magnetic beads.Possible biomarkers were analyzed by a random and repeat pattern model-validation method that we designed,and ClinProtools software,results were refined using online liquid chromatography-tandem MS.Results：We found a cluster of 5 peptides （4210,5264,2660,5635,and 5904 Da）,using 3 peptides （4210,5904,2660 Da） to discriminate EM patients from healthy volunteers,with 96.67％ sensitivity and 100％ specificity.We selected 4210 and 5904 m/z,which differed most between patients with EM and controls,and identified them as fragments of ATP1B4,and the fibrinogen alpha （FGA） isoform 1/2 of the FGA chain precursor,respectively.Conclusions：ClinProt can identify EM biomarkers,which-most notably-distinguish even early-stage or minimal disease.We found 5 stable peaks at 4210,5264,2660,5635,and 5904 Da as potential EM biomarkers,the strongest of which were associated with ATP1B4 （4210 Da） and FGA （5904 Da）; this indicates that ATP1B4 and FGA are associated with EM pathogenesis.展开更多
文摘目的应用液体蛋白芯片飞行时间质谱系统分析2型糖尿病性视网膜病变的血清蛋白质表达谱,寻找具有潜在诊断意义的血清标志物,以便于糖尿病视网膜病变的早期诊断。方法收集2型糖尿病但不伴糖尿病视网膜病变的患者24例,2型糖尿病合并糖尿病视网膜病变的患者21例血清样本,通过Clin Prot磁珠纯化、飞行时间质谱分析、Clin Pro Tools生物信息学方法研究糖尿病视网膜病变的血清蛋白表达谱。结果质荷比(m/z)为1945.53的蛋白峰能较好地鉴别糖尿病性视网膜病变。其识别率和预测能力分别为88.57%和82.08%。结论以液体蛋白芯片飞行时间质谱系统工具研究蛋白表达谱,筛选得到的质荷比为1945.53的蛋白可能为潜在的2型糖尿病性视网膜病变的血清标志物。
基金grants from the National Natural Science Foundation of China，supported by Peking University People＇s Hospital Research and Development Funds
文摘Background：We investigated possible biomarkers for endometriosis （EM） using the ClinProt technique and proteomics methods.Methods：We enrolled 50 patients with EM,34 with benign ovarian neoplasms and 40 healthy volunteers in this study.Serum proteomic spectra were generated by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry （MS） combined with weak cationic exchange （WCX） magnetic beads.Possible biomarkers were analyzed by a random and repeat pattern model-validation method that we designed,and ClinProtools software,results were refined using online liquid chromatography-tandem MS.Results：We found a cluster of 5 peptides （4210,5264,2660,5635,and 5904 Da）,using 3 peptides （4210,5904,2660 Da） to discriminate EM patients from healthy volunteers,with 96.67％ sensitivity and 100％ specificity.We selected 4210 and 5904 m/z,which differed most between patients with EM and controls,and identified them as fragments of ATP1B4,and the fibrinogen alpha （FGA） isoform 1/2 of the FGA chain precursor,respectively.Conclusions：ClinProt can identify EM biomarkers,which-most notably-distinguish even early-stage or minimal disease.We found 5 stable peaks at 4210,5264,2660,5635,and 5904 Da as potential EM biomarkers,the strongest of which were associated with ATP1B4 （4210 Da） and FGA （5904 Da）; this indicates that ATP1B4 and FGA are associated with EM pathogenesis.
