Over 11% of all pregnancies in the US result in preterm birth, greatly contributing to perinatal morbidity and mortality （Goldenberg and Rouse, 1998）. Preterm birth etiologies remain largely unknown, and effective p...Over 11% of all pregnancies in the US result in preterm birth, greatly contributing to perinatal morbidity and mortality （Goldenberg and Rouse, 1998）. Preterm birth etiologies remain largely unknown, and effective prevention methods have yet to be developed. The use of biofluid （e.g., serum or urine） for the analysis of the naturally occurring peptidome （MW 〈 4000） as a source of biomarkers has been reported for different diseases （Villanueva et al., 2006; Ling et al., 2010a, 2010b, 2010c, 2011）. Mass spectrometry-based profiling of naturally occurring peptides can provide an extensive in- ventory of serum peptides derived from either high-abundant endogenous circulating proteins or cell and tissue proteins （Liotta and Petricoin, 2006）.展开更多
目的:筛选胃癌血清差异表达蛋白,寻找胃癌血清标志物.方法:采集胃癌患者血清和正常对照人群血清各45例,所有血清样本去除高丰度血清蛋白质后,采用相对和绝对定量同位素标志(isobaric tags for relative and absolute q u a n t i t a t ...目的:筛选胃癌血清差异表达蛋白,寻找胃癌血清标志物.方法:采集胃癌患者血清和正常对照人群血清各45例,所有血清样本去除高丰度血清蛋白质后,采用相对和绝对定量同位素标志(isobaric tags for relative and absolute q u a n t i t a t i o n,i T R A Q)技术联合二维液相色谱-串联质谱(two-dimensional liquid chromatography/tandem mass spectrometry,2D-LC-MS/MS)分析和鉴定两组间的差异表达蛋白;采用生物信息学对差异蛋白进行分析;用Western blot对蛋白组中的代表性血清差异表达蛋白进行表达验证.结果:iTRAQ标记联合2D-LC-MS/MS分析一共鉴定出10540条独特肽段,对应199个非冗余蛋白,其中符合条件的差异蛋白17个,其中12个蛋白在胃癌患者中表达上调,5个蛋白在胃癌患者中表达下调.17种差异表达蛋白参与10种生物学过程、9种分子作用和2种细胞组分,涉及的5个生物代谢途径.Western blot结果显示,与正常对照人群相比,代表性差异表达蛋白ITIH4在胃癌患者血清中表达量上调,差异具有统计学意义(1.7517±0.247 vs 1±0,P<0.05).结论:ITIH4可能是诊断胃癌新的潜在生物标志物.展开更多
基金supported by the March of Dimes Prematurity Research Center at Stanford University, the Stanford Child Health Research Institutethe Stanford Clinical and Translational Science Award (CTSA) to Spectrum (UL1 TR001085)+1 种基金The CTSA program is led by the National Center for Advancing Translational Sciences (NCATS) at the National Institutes of Health (NIH)supported in part by the National Natural Science Foundation of China (NSFC) to ZT (No. 31201697)
文摘Over 11% of all pregnancies in the US result in preterm birth, greatly contributing to perinatal morbidity and mortality （Goldenberg and Rouse, 1998）. Preterm birth etiologies remain largely unknown, and effective prevention methods have yet to be developed. The use of biofluid （e.g., serum or urine） for the analysis of the naturally occurring peptidome （MW 〈 4000） as a source of biomarkers has been reported for different diseases （Villanueva et al., 2006; Ling et al., 2010a, 2010b, 2010c, 2011）. Mass spectrometry-based profiling of naturally occurring peptides can provide an extensive in- ventory of serum peptides derived from either high-abundant endogenous circulating proteins or cell and tissue proteins （Liotta and Petricoin, 2006）.
文摘目的:筛选胃癌血清差异表达蛋白,寻找胃癌血清标志物.方法:采集胃癌患者血清和正常对照人群血清各45例,所有血清样本去除高丰度血清蛋白质后,采用相对和绝对定量同位素标志(isobaric tags for relative and absolute q u a n t i t a t i o n,i T R A Q)技术联合二维液相色谱-串联质谱(two-dimensional liquid chromatography/tandem mass spectrometry,2D-LC-MS/MS)分析和鉴定两组间的差异表达蛋白;采用生物信息学对差异蛋白进行分析;用Western blot对蛋白组中的代表性血清差异表达蛋白进行表达验证.结果:iTRAQ标记联合2D-LC-MS/MS分析一共鉴定出10540条独特肽段,对应199个非冗余蛋白,其中符合条件的差异蛋白17个,其中12个蛋白在胃癌患者中表达上调,5个蛋白在胃癌患者中表达下调.17种差异表达蛋白参与10种生物学过程、9种分子作用和2种细胞组分,涉及的5个生物代谢途径.Western blot结果显示,与正常对照人群相比,代表性差异表达蛋白ITIH4在胃癌患者血清中表达量上调,差异具有统计学意义(1.7517±0.247 vs 1±0,P<0.05).结论:ITIH4可能是诊断胃癌新的潜在生物标志物.
