基于同位素标记相对和绝对定量(isobaric tags for relative and absolute quantity,iTRAQ)技术,以采自宁夏中宁的“宁杞1号”枸杞果实为样品,以采自新疆精河、内蒙古乌拉特前旗、甘肃瓜州和青海德令哈的“宁杞1号”枸杞果实为对照,进...基于同位素标记相对和绝对定量(isobaric tags for relative and absolute quantity,iTRAQ)技术,以采自宁夏中宁的“宁杞1号”枸杞果实为样品,以采自新疆精河、内蒙古乌拉特前旗、甘肃瓜州和青海德令哈的“宁杞1号”枸杞果实为对照,进行差异蛋白组学的生物信息学分析。结果表明,新疆/宁夏组、内蒙古/宁夏组、甘肃/宁夏组和青海/宁夏组分别有446,166,966个和1015个差异表达蛋白(DEPs),与枸杞多糖合成代谢相关的DEPs共160个。进一步筛选得到23个与枸杞多糖相关DEPs,包括蔗糖磷酸合成酶、β-葡萄糖苷酶和α-半乳糖苷酶等。推测采自不同产地的枸杞果实的多糖合成代谢差异通路主要包括蔗糖、纤维素、半乳聚糖、半纤维素和果胶合成代谢过程,且这些过程均可通过UDP-葡萄糖链接在一起。通过蛋白组学分析枸杞多糖合成途径上的相关蛋白,为深入研究不同产地同种枸杞多糖调控机制提供理论参考。展开更多
Objective The aim of the study was to investigate the expression of proteins in colonic tissues of mice with ulcerative colitis(UC) by using isobaric tags for relative and absolute quantitation(iTRAQ), probe into the ...Objective The aim of the study was to investigate the expression of proteins in colonic tissues of mice with ulcerative colitis(UC) by using isobaric tags for relative and absolute quantitation(iTRAQ), probe into the pathogenesis of UC, and find potential biomarkers of UC. Methods Forty C57 mice were randomly divided into the control and model groups(20 mice in each group). The mice in the model group were administered dextran sulphate sodium(DSS) for 7 consecutive days ad libitum to induce acute colitis, and the colon tissue was extracted on the 8 th day after the successful establishment of the UC model. Proteins were identified by the i TRAQ and tandem mass spectrometry techniques,and the identified proteins were analyzed by bioinformatics. Results A total of 4019 proteins were identified among the two groups. Among them, 317 significant differentially expressed proteins(DEPs) were detected according to the screening criteria for selecting DEPs, i.e. fold change ratios ≥ 1.5 or ≤ 0.67 and P-values < 0.05, of which 156 were upregulated and 161 were downregulated. In the Gene Ontology(GO) analysis, the DEPs were classified into 48 functional categories, which contained biological process, cellular component, and molecular function. Based on the 317 DEPs, the KEGG pathway analysis identified 160 vital pathways.Conclusion DEPs in colonic tissues of mice with UC were screened using the iTRAQ technique, which laid a foundation for further studies regarding the pathogenesis of UC.展开更多
文摘基于同位素标记相对和绝对定量(isobaric tags for relative and absolute quantity,iTRAQ)技术,以采自宁夏中宁的“宁杞1号”枸杞果实为样品,以采自新疆精河、内蒙古乌拉特前旗、甘肃瓜州和青海德令哈的“宁杞1号”枸杞果实为对照,进行差异蛋白组学的生物信息学分析。结果表明,新疆/宁夏组、内蒙古/宁夏组、甘肃/宁夏组和青海/宁夏组分别有446,166,966个和1015个差异表达蛋白(DEPs),与枸杞多糖合成代谢相关的DEPs共160个。进一步筛选得到23个与枸杞多糖相关DEPs,包括蔗糖磷酸合成酶、β-葡萄糖苷酶和α-半乳糖苷酶等。推测采自不同产地的枸杞果实的多糖合成代谢差异通路主要包括蔗糖、纤维素、半乳聚糖、半纤维素和果胶合成代谢过程,且这些过程均可通过UDP-葡萄糖链接在一起。通过蛋白组学分析枸杞多糖合成途径上的相关蛋白,为深入研究不同产地同种枸杞多糖调控机制提供理论参考。
基金Supported by a grant from the Natural Science Foundation of Hubei Province(No.2011CHB025)
文摘Objective The aim of the study was to investigate the expression of proteins in colonic tissues of mice with ulcerative colitis(UC) by using isobaric tags for relative and absolute quantitation(iTRAQ), probe into the pathogenesis of UC, and find potential biomarkers of UC. Methods Forty C57 mice were randomly divided into the control and model groups(20 mice in each group). The mice in the model group were administered dextran sulphate sodium(DSS) for 7 consecutive days ad libitum to induce acute colitis, and the colon tissue was extracted on the 8 th day after the successful establishment of the UC model. Proteins were identified by the i TRAQ and tandem mass spectrometry techniques,and the identified proteins were analyzed by bioinformatics. Results A total of 4019 proteins were identified among the two groups. Among them, 317 significant differentially expressed proteins(DEPs) were detected according to the screening criteria for selecting DEPs, i.e. fold change ratios ≥ 1.5 or ≤ 0.67 and P-values < 0.05, of which 156 were upregulated and 161 were downregulated. In the Gene Ontology(GO) analysis, the DEPs were classified into 48 functional categories, which contained biological process, cellular component, and molecular function. Based on the 317 DEPs, the KEGG pathway analysis identified 160 vital pathways.Conclusion DEPs in colonic tissues of mice with UC were screened using the iTRAQ technique, which laid a foundation for further studies regarding the pathogenesis of UC.
