13 research outputs found
艾纳香油通过NF-κB非经典信号影响花生四烯酸代谢缓解LPS所致巨噬细胞的炎症反应
目的本文旨在探讨艾纳香油(BBO)通过核转录因子κB(NF-κB)非经典通路影响花生四烯酸(AA)代谢通路发挥抗炎作用。方法采用豚鼠离体回肠法检测BBO对慢反应物质(SRS-A)生成的影响,ELISA法检测BBO对脂多糖(LPS) 诱导巨噬细胞前列腺素E2(PGE2)及白三烯 B4(LTB4)产生的影响,qRT-PCR检测BBO对LPS诱导巨噬细胞COX-2、5-LOX、FLAP和RelB表达的影响,Western blot检测BBO对NF-κB非经典通路蛋白肿瘤坏死因子受体作用因子3(TRAF3)、肿瘤坏死因子受体作用因子2(TRAF2)、NF-κB 诱导激酶(NIK)、p100和RelB浓度的影响。结果在1mg·mL-1的BBO药物浓度下减弱了豚鼠回肠的收缩张力(P<0.001),对SRS-A的生成抑制率达到65.34%;与LPS模型组相比,BBO在40-80 μg· mL-1浓度下降低AA代谢通路中PGE2(P<0.05)和LTB4(P<0.05)的浓度,降低COX-2(P<0.05)、5-LOX(P<0.05)和FLAP(P<0.05)的表达;此外,40-80 μg· mL-1浓度下BBO还降低LPS导致的NF-κB非经典通路中TRAF3(P<0.05)、TRAF2(P<0.05)和NIK(P<0.05)的浓度,进一步抑制p100蛋白的磷酸化(P<0.05),同时抑制转录因子RelB的表达(P<0.05)和RelB蛋白的水平(P<0.05),而BBO自身不引起这些基因与蛋白的变化。结论BBO可能通过抑制NF-κB非经典信号中调节蛋白TRAF3和TRAF2,转录因子RelB的浓度,造成NIK蛋白的诱导激酶作用受到抑制,进一步抑制了p100蛋白的磷酸化及其与转录因子RelB的结合,从而影响到下游AA通路中重要限速酶COX-2、5-LOX和 FLAP的表达与炎症介质PGE2和LTB4的水平发挥抗炎作用
干扰素调节因子5下调PARP-1抑制鼻咽癌细胞的侵袭力
【目的】探讨干扰素调节因子5(IFR5)是否通过下调DNA修复酶PARP-1,进而抑制鼻咽癌细胞的侵
袭能力。【方法】本研究使用的临床标本是经病理确诊的鼻咽癌患者组织标本46例和正常组织51例。免疫组化
检测鼻咽癌组织和正常组织中IRF5和PARP-1的表达。构建IFR5过表达质粒,上调鼻咽癌细胞CNE-2中IFR5
表达,荧光定量PCR(QPCR)和免疫印迹确定建立IRF5过表达细胞。上调IRF5表达后,划痕和transwell实验检
测细胞侵袭能力的改变,QPCR 和免疫印迹检测PARP-1表达量的变化。上调IFR5表达的同时加入PARP-1过
表达质粒,观察PARP-1是否可逆转IFR5对侵袭能力的影响。【结果】免疫组化结果表明IRF5在癌组织中的表达
量低于正常组织,而PARP-1则相反。QPCR和免疫印迹确定建立IRF5 mRNA和蛋白过表达的细胞株CNE-2/
IFR5。细胞划痕实验显示CNE-2/IFR5愈合率较对照组降低(P<0.01),transwell实验表明CNE-2/IFR5细胞穿过
基底膜的数目小于对照组(P<0.01),提示上调 IFR5 可抑制鼻咽癌细胞的侵袭能力。上调 IFR5 后,PARP-1
mRNA和蛋白的表达量降低(P<0.01);上调IFR5表达的同时过表达PARP-1,可逆转单独上调IRF5对细胞侵袭
能力的改变。提示 IFR5 可通过下调 PARP-1 进而抑制鼻咽癌癌细胞的侵袭能力。【结论】IFR5 可通过下调
PARP-1进而抑制鼻咽癌癌细胞的侵袭能力。本研究可能为降低鼻咽癌侵袭能力提供新的靶点
CMOS集成电路用Φ150-200mm外延硅材料
报道了Φ150mm CMOS硅外延材料的研究开发及集成电路应用成果,对Φ200mmP/P~-硅外延材料进行了初步探索研究。Φ150mm P/P~+硅外延片实现了批量生产,并成功应用于集成电路生产线,芯片成品率大于80%。硅外延片的参数指标能满足集成电路制造要求
Physical health care monitoring for people with serious mental illness
Background
Current guidance suggests that we should monitor the physical health of people with serious mental illness and there has been a significant financial investment over recent years to provide this.
Objectives
To assess the effectiveness of physical health monitoring as a means of reducing morbidity, mortality and reduction in quality of life in people with serious mental illness.
Search methods
We searched the Cochrane Schizophrenia Group Trials Register (October 2009) which is based on regular searches of CINAHL, EMBASE, MEDLINE and PsycINFO.
Selection criteria
All randomised or quasi-randomised clinical trials focusing on physical health monitoring versus standard care or comparing i) self monitoring vs monitoring by health care professional; ii) simple vs complex monitoring; iii) specific vs non-specific checks iv) once only vs regular checks or v) comparison of different guidance.
Data collection and analysis
The authors (GT, AC, SM) independently screened search results and identified three studies as possibly fulfilling the review's criteria. On examination, however, all three were subsequently excluded.
Main results
We did not identify any randomised trials which assessed the effectiveness of physical health monitoring in people with serious mental illness.
Authors' conclusions
There is no evidence from randomised trials to support current guidance and practice. Guidance and practice are based on expert consensus, clinical experience and good intentions rather than high quality evidenc
碳离子诱导的DNA双链断裂
DNA双链断裂(DSBs)是电离辐射诱导的最重要的原发损伤,研究DSBs有利于揭示细胞辐射敏感性的机理。用倒转脉冲场凝胶电泳结合荧光扫描进行DNA定量研究75MeV/u12C6+对小鼠B16黑色素瘤细胞DSBs的诱导,结果表明:DSBs产额约为0.74DSBs/100Mbp/Gy;DNA片段分布在两个区域。大片段区分子量约为1.4Mbp~3.2Mbp,分子量小于1.2Mbp的为小片段区;并且随着剂量的增加,大片段区DNA含量逐渐下降,而小片段区的DNA含量显著增加。表明B16DNA分子上可能存在对重离子较为敏感的位点。攀登计划(B)”项目,中国科学院兰州分院基