Gene expression profile changes in brain regions following traumatic brain injury at the gene level cannot sufficiently elucidate gene expression time, expression amount, protein post-translational processing or modif...Gene expression profile changes in brain regions following traumatic brain injury at the gene level cannot sufficiently elucidate gene expression time, expression amount, protein post-translational processing or modification. Therefore, it is necessary to quantitatively analyze the gene expression profile using proteomic techniques. In the present study, we established a rat model of closed brain injury using Marmarou＇s weight-drop device, and investigated hippocampal differential protein expression using two-dimensional gel electrophoresis and surface-enhanced laser desorption ionization-time of flight-mass spectrometry. A total of 364 protein peaks were detected on weak cation exchange-2 protein chips, including 37 differential protein peaks. 345 protein peaks were detected on immobilized metal affinity capture arrays-Cu, including 12 differential protein peaks Further examination of these differential proteins revealed that glucose-regulated protein and proteasome subunit alpha type 3 expression were significantly upregulated post-injury. These results indicate that brain injury can alter protein expression in the hippocampus, and that glucose-regulated protein and proteasome subunit alpha type 3 are closely associated with the occurrence and development of traumatic brain injury.展开更多
目的探讨原发性肝癌介入治疗围手术期不同中医证型的血清蛋白差异表达,并分析其意义。方法将154例原发性肝癌患者按中医辨证分为肝郁证(37例)、脾虚证(45例)、湿热证(18例)、血瘀证(28例)及阴虚证(26例),应用表面加强激光解析电离化飞...目的探讨原发性肝癌介入治疗围手术期不同中医证型的血清蛋白差异表达,并分析其意义。方法将154例原发性肝癌患者按中医辨证分为肝郁证(37例)、脾虚证(45例)、湿热证(18例)、血瘀证(28例)及阴虚证(26例),应用表面加强激光解析电离化飞行时间质谱法(surface enhanced laser desorption ionization time of flight mass spectrometry,SELDI-TOF-MS)分析其血清蛋白指纹图谱,并结合中医证候特点,探讨肝癌介入治疗围手术期不同中医证型的血清蛋白差异表达。结果介入前1周,M/Z为3392、4970、5911、6200、8575Da的血清蛋白峰在各证型间的表达比较,差异有统计学意义(P<0.05,P<0.01);上述5个差异蛋白峰同时出现于脾虚证和血瘀证中。介入后1周,阴虚证M/Z为8575Da的血清蛋白峰表达下调,差异有统计学意义(P<0.01)。结论肝癌介入治疗围手术期不同证型间出现血清差异蛋白质峰。展开更多
背景与目的:人卵巢浆液性乳头状腺癌细胞株SKOV3及其在裸鼠体内建立的淋巴结定向高转移亚克隆第二代SKOV3-pm2、第三代SKOV3-pm3细胞株,为卵巢癌转移分子机制的研究提供了细胞模型。本研究应用飞行时间质谱技术结合蛋白芯片分析筛选卵...背景与目的:人卵巢浆液性乳头状腺癌细胞株SKOV3及其在裸鼠体内建立的淋巴结定向高转移亚克隆第二代SKOV3-pm2、第三代SKOV3-pm3细胞株,为卵巢癌转移分子机制的研究提供了细胞模型。本研究应用飞行时间质谱技术结合蛋白芯片分析筛选卵巢癌淋巴结定向高转移与非定向转移细胞株之间的蛋白质表达差异。方法:采用动物实验测定SKOV3、SKOV3-pm2和SKOV3-pm3三种细胞株的淋巴结转移率。应用表面增强激光解吸离子化-飞行时间质谱(surface-enhanced laser desorption and ionization-time of flight-mass spectrometry,SELDI-TOF-MS)技术检测各细胞株提取的胞浆总蛋白和分泌蛋白,每种细胞分别采用CM-10型弱阳离子交换芯片和IMAC-3型固定金属亲和芯片检测。应用Ciphergen Protein Software3.2.0软件和Biomarker Wizard软件对采集3组细胞的蛋白峰进行比较,峰强度相差0.5倍以上者定义为差异蛋白。结果:动物实验显示,细胞株SKOV3及高转移亚克隆SKOV3-pm2、SKOV3-pm3的淋巴结转移率分别为20%、90%和100%,前者与后二者之间的差异有统计学意义(P<0.05)。获得CM-10和IMAC3两种蛋白芯片上SKOV3、SKOV3-pm2、SKOV3-pm3细胞株蛋白质谱图谱,对比发现:质荷比(m/z)为6971、7475、9089、9453、10103、11655的胞浆蛋白及质荷比(m/z)为4746的分泌蛋白在上述三种细胞株中存在不同程度差异表达。结论:应用SELDI-TOF-MS技术结合固定金属亲和芯片和弱阳离子交换芯片,可有效筛选卵巢癌淋巴结定向高转移特性细胞株中的特异性表达蛋白;寻找到的差异蛋白与淋巴结定向高转移潜能密切相关。展开更多
Objectives： To detect the serum proteomic patterns by using SELDI-TOF-MS （surface enhanced laser desorption/ ionization-time of flight-mass spectrometry） technology and CM10 ProteinChip in colorectal cancer （CRC）...Objectives： To detect the serum proteomic patterns by using SELDI-TOF-MS （surface enhanced laser desorption/ ionization-time of flight-mass spectrometry） technology and CM10 ProteinChip in colorectal cancer （CRC） patients, and to evaluate the significance of the proteomic patterns in the tumour staging of colorectal cancer. Methods： SELDI-TOF-MS and CM10 ProteinChip were used to detect the serum proteomic patterns of 76 patients with colorectal cancer, among them, 10 Stage Ⅰ, 19 Stage Ⅱ, 16 Stage Ⅲ and 31 Stage Ⅳ samples. Different stage models were developed and validated by support vector machines, disctiminant analysis and time-sequence analysis. Results： The Model Ⅰ formed by 6 protein peaks （m/z： 2759.58, 2964.66, 2048.01, 4795.90, 4139.77 and 37761.60） could be used to distinguish local CRC patients （Stage Ⅰ and Stage Ⅱ） from regional CRC patients （Stage Ⅲ） with an accuracy of 86.67% （39/45）. The Model Ⅱ formed by 3 protein peaks （m/z： 6885.30, 2058.32 and 8567,75） could be used to distinguish locoregional CRC patients （Stage Ⅰ, Stage Ⅱ and Stage Ⅲ） from systematic CRC patients （Stage IV） With an accuracy of 75.00% （57/76）. The Model Ⅲ could distinguish Stage Ⅰ from Stage Ⅱ with an accuracy of 86.21% （25/29）. The Model Ⅳ could distinguish Stage Ⅰ from Stage Ⅲ with accuracy of 84.62% （22/26）. The Model Ⅴ could distinguish Stage Ⅱ from Stage Ⅲ with accuracy of 85.71% （30/35）. The Model Ⅵ could distinguish Stage Ⅱ from Stage Ⅳ with accuracy of 80.00% （40/50）. The Model Ⅶ could distinguish Stage Ⅲ from Stage Ⅳ with accuracy of 78.72% （37/47）. Different stage groups could be distinguished by the two-dimensional scattered spots figure obviously. Conclusion： This method showed great success in preoperatively determining the colorectal cancer stage of patients.展开更多
目的对三亚市2022年7月15日发生一起食源性暴发事件进行同源性分析,为临床治疗和防控提供科学依据,探讨脉冲场凝胶电泳(Pulsed-field gel electrophoresis,PFGE)技术和基质辅助激光解析电离飞行时间质谱(matrix-assisted laser desorpti...目的对三亚市2022年7月15日发生一起食源性暴发事件进行同源性分析,为临床治疗和防控提供科学依据,探讨脉冲场凝胶电泳(Pulsed-field gel electrophoresis,PFGE)技术和基质辅助激光解析电离飞行时间质谱(matrix-assisted laser desorption/ionization time-of-flight mass spectrometry,MALDI-TOF MS)技术在沙门菌同源分析中的应用可行性。方法通过传统的细菌检验方法、PFGE和MALDI-TOF MS技术与临床症状、流行病特征相结合,准确对食物中毒事件溯源分析。结果本起事件中出现发热、恶心、呕吐等中毒症状共14例,均有在同一餐厅就餐经历,发病过程和临床表现相似,其中1例为该餐厅制蛋炒饭厨师。经病原学培养鉴定显示为猪霍乱沙门菌和鼠伤寒沙门菌共同引起,其中采集患者14例,检出猪霍乱沙门菌5例,鼠伤寒沙门氏菌3例,阳性率为57.14%(8/14)。环境样本检出1份,食品样本2份。PFGE图谱结果显示9种PFGE型,7株菌株同源性为95.0%,4株菌株同源性为94.0%。结论此次食物中毒原因是食用被猪霍乱沙门菌的蛋炒饭和含鼠伤寒沙门菌污染的猪肉肠。今后应加强食品污染和有害因素风险监测,从食品供应源头保证食品安全,严防食源性感染事件发生。同时规范相关人员健康体检,多渠道宣教食源性疾病危害和预防知识也至关重要。展开更多
基金the National Natural Science Foundation of China,No. 30471934
文摘Gene expression profile changes in brain regions following traumatic brain injury at the gene level cannot sufficiently elucidate gene expression time, expression amount, protein post-translational processing or modification. Therefore, it is necessary to quantitatively analyze the gene expression profile using proteomic techniques. In the present study, we established a rat model of closed brain injury using Marmarou＇s weight-drop device, and investigated hippocampal differential protein expression using two-dimensional gel electrophoresis and surface-enhanced laser desorption ionization-time of flight-mass spectrometry. A total of 364 protein peaks were detected on weak cation exchange-2 protein chips, including 37 differential protein peaks. 345 protein peaks were detected on immobilized metal affinity capture arrays-Cu, including 12 differential protein peaks Further examination of these differential proteins revealed that glucose-regulated protein and proteasome subunit alpha type 3 expression were significantly upregulated post-injury. These results indicate that brain injury can alter protein expression in the hippocampus, and that glucose-regulated protein and proteasome subunit alpha type 3 are closely associated with the occurrence and development of traumatic brain injury.
文摘目的探讨原发性肝癌介入治疗围手术期不同中医证型的血清蛋白差异表达,并分析其意义。方法将154例原发性肝癌患者按中医辨证分为肝郁证(37例)、脾虚证(45例)、湿热证(18例)、血瘀证(28例)及阴虚证(26例),应用表面加强激光解析电离化飞行时间质谱法(surface enhanced laser desorption ionization time of flight mass spectrometry,SELDI-TOF-MS)分析其血清蛋白指纹图谱,并结合中医证候特点,探讨肝癌介入治疗围手术期不同中医证型的血清蛋白差异表达。结果介入前1周,M/Z为3392、4970、5911、6200、8575Da的血清蛋白峰在各证型间的表达比较,差异有统计学意义(P<0.05,P<0.01);上述5个差异蛋白峰同时出现于脾虚证和血瘀证中。介入后1周,阴虚证M/Z为8575Da的血清蛋白峰表达下调,差异有统计学意义(P<0.01)。结论肝癌介入治疗围手术期不同证型间出现血清差异蛋白质峰。
文摘背景与目的:人卵巢浆液性乳头状腺癌细胞株SKOV3及其在裸鼠体内建立的淋巴结定向高转移亚克隆第二代SKOV3-pm2、第三代SKOV3-pm3细胞株,为卵巢癌转移分子机制的研究提供了细胞模型。本研究应用飞行时间质谱技术结合蛋白芯片分析筛选卵巢癌淋巴结定向高转移与非定向转移细胞株之间的蛋白质表达差异。方法:采用动物实验测定SKOV3、SKOV3-pm2和SKOV3-pm3三种细胞株的淋巴结转移率。应用表面增强激光解吸离子化-飞行时间质谱(surface-enhanced laser desorption and ionization-time of flight-mass spectrometry,SELDI-TOF-MS)技术检测各细胞株提取的胞浆总蛋白和分泌蛋白,每种细胞分别采用CM-10型弱阳离子交换芯片和IMAC-3型固定金属亲和芯片检测。应用Ciphergen Protein Software3.2.0软件和Biomarker Wizard软件对采集3组细胞的蛋白峰进行比较,峰强度相差0.5倍以上者定义为差异蛋白。结果:动物实验显示,细胞株SKOV3及高转移亚克隆SKOV3-pm2、SKOV3-pm3的淋巴结转移率分别为20%、90%和100%,前者与后二者之间的差异有统计学意义(P<0.05)。获得CM-10和IMAC3两种蛋白芯片上SKOV3、SKOV3-pm2、SKOV3-pm3细胞株蛋白质谱图谱,对比发现:质荷比(m/z)为6971、7475、9089、9453、10103、11655的胞浆蛋白及质荷比(m/z)为4746的分泌蛋白在上述三种细胞株中存在不同程度差异表达。结论:应用SELDI-TOF-MS技术结合固定金属亲和芯片和弱阳离子交换芯片,可有效筛选卵巢癌淋巴结定向高转移特性细胞株中的特异性表达蛋白;寻找到的差异蛋白与淋巴结定向高转移潜能密切相关。
基金Project (No. 30471987) supported by the National Natural ScienceFoundation of China
文摘Objectives： To detect the serum proteomic patterns by using SELDI-TOF-MS （surface enhanced laser desorption/ ionization-time of flight-mass spectrometry） technology and CM10 ProteinChip in colorectal cancer （CRC） patients, and to evaluate the significance of the proteomic patterns in the tumour staging of colorectal cancer. Methods： SELDI-TOF-MS and CM10 ProteinChip were used to detect the serum proteomic patterns of 76 patients with colorectal cancer, among them, 10 Stage Ⅰ, 19 Stage Ⅱ, 16 Stage Ⅲ and 31 Stage Ⅳ samples. Different stage models were developed and validated by support vector machines, disctiminant analysis and time-sequence analysis. Results： The Model Ⅰ formed by 6 protein peaks （m/z： 2759.58, 2964.66, 2048.01, 4795.90, 4139.77 and 37761.60） could be used to distinguish local CRC patients （Stage Ⅰ and Stage Ⅱ） from regional CRC patients （Stage Ⅲ） with an accuracy of 86.67% （39/45）. The Model Ⅱ formed by 3 protein peaks （m/z： 6885.30, 2058.32 and 8567,75） could be used to distinguish locoregional CRC patients （Stage Ⅰ, Stage Ⅱ and Stage Ⅲ） from systematic CRC patients （Stage IV） With an accuracy of 75.00% （57/76）. The Model Ⅲ could distinguish Stage Ⅰ from Stage Ⅱ with an accuracy of 86.21% （25/29）. The Model Ⅳ could distinguish Stage Ⅰ from Stage Ⅲ with accuracy of 84.62% （22/26）. The Model Ⅴ could distinguish Stage Ⅱ from Stage Ⅲ with accuracy of 85.71% （30/35）. The Model Ⅵ could distinguish Stage Ⅱ from Stage Ⅳ with accuracy of 80.00% （40/50）. The Model Ⅶ could distinguish Stage Ⅲ from Stage Ⅳ with accuracy of 78.72% （37/47）. Different stage groups could be distinguished by the two-dimensional scattered spots figure obviously. Conclusion： This method showed great success in preoperatively determining the colorectal cancer stage of patients.
文摘目的对三亚市2022年7月15日发生一起食源性暴发事件进行同源性分析,为临床治疗和防控提供科学依据,探讨脉冲场凝胶电泳(Pulsed-field gel electrophoresis,PFGE)技术和基质辅助激光解析电离飞行时间质谱(matrix-assisted laser desorption/ionization time-of-flight mass spectrometry,MALDI-TOF MS)技术在沙门菌同源分析中的应用可行性。方法通过传统的细菌检验方法、PFGE和MALDI-TOF MS技术与临床症状、流行病特征相结合,准确对食物中毒事件溯源分析。结果本起事件中出现发热、恶心、呕吐等中毒症状共14例,均有在同一餐厅就餐经历,发病过程和临床表现相似,其中1例为该餐厅制蛋炒饭厨师。经病原学培养鉴定显示为猪霍乱沙门菌和鼠伤寒沙门菌共同引起,其中采集患者14例,检出猪霍乱沙门菌5例,鼠伤寒沙门氏菌3例,阳性率为57.14%(8/14)。环境样本检出1份,食品样本2份。PFGE图谱结果显示9种PFGE型,7株菌株同源性为95.0%,4株菌株同源性为94.0%。结论此次食物中毒原因是食用被猪霍乱沙门菌的蛋炒饭和含鼠伤寒沙门菌污染的猪肉肠。今后应加强食品污染和有害因素风险监测,从食品供应源头保证食品安全,严防食源性感染事件发生。同时规范相关人员健康体检,多渠道宣教食源性疾病危害和预防知识也至关重要。
