期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
基于LC-MS/MS技术同时定量分析片仔癀中特征胰酶水解肽
1
作者 李文正 刘文静 +5 位作者 曹妍 李玮 赵晨 刘丛盛 宋青青 宋月林 《中国现代中药》 CAS 2023年第4期880-887,共8页
目的:阐明片仔癀中的蛋白组,定量分析其中的特征胰酶水解肽,以提高片仔癀的质量控制水平。方法:优化总蛋白提取条件,采用二辛可宁酸(BCA)法测定总蛋白含量,利用鸟枪法蛋白组学表征片仔癀的蛋白组,并进一步选择含量较高、稳定性好、长度... 目的:阐明片仔癀中的蛋白组,定量分析其中的特征胰酶水解肽,以提高片仔癀的质量控制水平。方法:优化总蛋白提取条件,采用二辛可宁酸(BCA)法测定总蛋白含量,利用鸟枪法蛋白组学表征片仔癀的蛋白组,并进一步选择含量较高、稳定性好、长度适宜的特征多肽作为目标分析物,采用在线能量分辨质谱法(online ER-MS)优化特征肽的离子对及最佳碰撞能,建立反相液相色谱-选择反应监测(RPLC-SRM)定量分析方法,测定11批片仔癀中目标多肽的含量。结果:利用UniProt数据库从片仔癀中共鉴定了来源于200个蛋白的343个肽段,以酶和骨架蛋白为主;筛选得到ALSSALHER、TLLEGEESR和VAPLGEEFR 3个特征肽,以其作为目标分析物进行定量分析,online ER-MS优化3个特征肽的定量参数离子对分别为m/z 492.3→799.4、517.3→819.4和509.3→637.3,碰撞能分别为25.0、24.4、28.6 eV。方法学验证符合定量要求,3个多肽类成分在各批片仔癀样品中均被检出(ALSSALHER:0.06~0.44μg·g^(–1);TLLEGEESR:0.08~0.26μg·g^(–1);VAPLGEEFR:0.27~1.09μg·g^(–1)),含量差异较小,其中特征肽VAPLGEEFR的含量较高。结论:建立的方法可靠,可为富含蛋白类成分的中药制剂的质量评价提供思路与方法。 展开更多
关键词 片仔癀 酶切特征肽 定量分析 选择反应监测 在线能量分辨质谱
在线阅读 下载PDF
Discussion on the Assessment Method of Wind Energy Resources by Using Regional Meteorological Data 被引量:4
2
作者 HE Jie-yan DAI Yu +3 位作者 JIN Xuan-xi LV Xiao-hua WANG Wei-nong liu cong-sheng 《Meteorological and Environmental Research》 CAS 2011年第2期10-12,17,共4页
The exploitation status of wind energy resources was analyzed, and the distribution of wind energy resources and regional meteorological stations were introduced, and then the assessment method of wind energy resource... The exploitation status of wind energy resources was analyzed, and the distribution of wind energy resources and regional meteorological stations were introduced, and then the assessment method of wind energy resources by using data from regional meteorological station was studied taking Huangjin Regional Meteorological Station in Xinning County in Hunan Province for example, besides, corresponding software was compiled. By means of SQL database and program, the method was used simply and easily and had positive meaning for the development of wind energy resources and excavation of wind farm in inland region. 展开更多
关键词 Regional meteorological station Wind energy resources Assessment method China
在线阅读 下载PDF
Pien Tze Huang Inhibits Migration and Invasion of Hepatocellular Carcinoma Cells by Repressing PDGFRB/YAP/CCN2 Axis Activity 被引量:3
3
作者 LUO Zhi-yi TIAN Qi +12 位作者 CHENG Niang-mei liu Wen-han YANG Ye CHEN Wei ZHANG Xiang-zhi ZHENG Xiao-yuan CHEN Ming-sheng ZHUANG Qiu-yu ZHAO Bi-xing liu cong-sheng liu Xiao-long LI Qin WANG Ying-chao 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2024年第2期115-124,共10页
Objective:To investigate the effects of Pien Tze Huang(PZH) on the migration and invasion of HCC cells and underlying molecular mechanism.Methods:Cell counting kit-8(CCK-8) was applied to evaluate the cell viabilities... Objective:To investigate the effects of Pien Tze Huang(PZH) on the migration and invasion of HCC cells and underlying molecular mechanism.Methods:Cell counting kit-8(CCK-8) was applied to evaluate the cell viabilities of SMMC-7721,SK-Hep-1,C3A and HL-7702(6 × 10^(3)cells/well) co-incubated with different concentrations of PZH(0,0.2,0.4,0.6,0.8 mg/mL) for 24 h.Transwell,wound healing assay,CCK-8and Annexin V-FITC/PI staining were conducted to investigate the effects of PZH on the migration,invasion,proliferation and apoptosis of SK-Hep-1 and SMMC-7721 cells(650 μg/mL for SK-Hep-1 cells and 330 μg/mL for SMMC-7721 cells),respectively.In vivo,lung metastasis mouse model constructed by tail vein injection of HCC cells was used for evaluating the anti-metastasis function of PZH.SK-Hep-1 cells(10^(6)cells/200 μL per mice) were injected into B-NDG mice via tail vein.Totally 8 mice were randomly divided into PZH and control groups,4 mice in each group.After 2-d inoculation,mice in the PZH group were administered with PZH(250 mg/kg,daily) and mice in the control group received only vehicle(PBS) from the 2nd day after xenograft to day 17.Transcriptome analysis based on RNA-seq was subsequently used for deciphering anti-tumor mechanism of PZH.Quantitative real-time polymerase chain reaction(qRT-PCR) and Western blot were applied to verify RNA-seq results.Luciferase reporter assay was performed to examine the transcriptional activity of yes-associated protein(YAP).Results:PZH treatment significantly inhibited the migration,invasion,proliferation and promoted the apoptosis of HCC cells in vitro and in vivo(P<0.01).Transcriptome analysis indicated that Hippo signaling pathway was associated with anti-metastasis function of PZH.Mechanical study showed PZH significantly inhibited the expressions of platelet derived growth factor receptor beta(PDGFRB),YAP,connective tissue growth factor(CCN2),N-cadherin,vimentin and matrix metallopeptidase 2(MMP2,P<0.01).Meanwhile,the phosphorylation of YAP was also enhanced by PZH treatment in vitro and in vivo.Furthermore,PZH played roles in inhibiting the transcriptional activity of YAP.Conclusion:PZH restrained migration,invasion and epithelialmesenchymal transition of HCC cells through repressing PDGFRB/YAP/CCN2 axis. 展开更多
关键词 PienTzeHuang hepatocellular carcinoma RNA-SEQ HIPPO yes-associated protein
原文传递
三七化学成分和药理作用研究概况及质量标志物的预测 被引量:66
4
作者 石礼平 张国壮 +3 位作者 刘丛盛 黄志鑫 郑玉清 董林林 《中国中药杂志》 CAS CSCD 北大核心 2023年第8期2059-2067,共9页
三七植物含三萜皂苷、黄酮、氨基酸、多糖、挥发油等活性成分,具有活血、止血、散瘀等功效。该文对三七的本草考证、化学成分和主要药理活性进行总结,并基于中药质量标志物(Q-marker)的理论,从植物亲缘关系、药效、药性、化学成分可测... 三七植物含三萜皂苷、黄酮、氨基酸、多糖、挥发油等活性成分,具有活血、止血、散瘀等功效。该文对三七的本草考证、化学成分和主要药理活性进行总结,并基于中药质量标志物(Q-marker)的理论,从植物亲缘关系、药效、药性、化学成分可测性等方面对三七的质量标志物进行预测分析,推断三七中特定比例的人参皂苷Rg_(1)、Re、Rb_(1),以及人参皂苷Rb2、Rb3、Rc、Rd、Rh2、Rg3和三七皂苷R1、三七素、槲皮素可作为三七潜在的质量标志物,为反映三七功效的质量标准制定提供了参考。 展开更多
关键词 三七 本草考证 化学成分 药理作用 质量标志物
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部