Expression profile of voltage-gated potassium channel Kv1.3 in aorta of atherosclerosis rats

目的探讨动脉粥样硬化(AS)大鼠主动脉病变局部离子通道kV1.3的表达水平及作用。方法雄性WISTAr大鼠16只,随机分为两组:正常组(8只,予普通饮食+0.9%氯化钠溶液)和AS组(8只,予高脂饮食+维生素d3负荷)。采用组织病理学检查,观察主动脉粥样硬化病变。采用实时定量反转录-聚合酶链反应(rT-PCr)和WESTErn印迹法检测主动脉病变局部kV1.3和白细胞介素(Il)-2、干扰素(Ifn)-γ的表达水平。结果组织病理学检查证实纤维增生性AS斑块。AS组的kV1.3MrnA为(31.48±8.64)x10-3,显著高于正常组的(3.28±0.79)x10-3(P=0.012)。AS组的kV1.3、Il-2、Ifn-γ蛋白表达量分别为0.691±0.067、0.611±0.055、0.759±0.050,均显著高于正常组的0.490±0.052、0.299±0.058、0.273±0.052(P值均<0.01)。结论 kV1.3在主动脉粥样硬化病变局部的表达增高。kV1.3可能在AS的发生和发展过程中发挥着重要的作用。Objective To investigate the expression of voltage-gated potassium channel Kv1.3 in the aorta of a rat model of atherosclerosis and its role in the progress of atherosclerotic plaque formation.Methods A total of 16 male Wistar rats were randomly divided into normal control(normal diet and saline)and atherosclerosis group(high lipid diet+Vitamin D3 overload),with 8 rats in each group.In 16 weeks later,all rats were killed after weighing,and their blood samples and aorta were collected.Pathological changes of the rat aortic artery were observed with HE staining.Real time RT-PCR and Western blotting analysis were used to determine the mRNA and protein expression of Kv1.3 and the protein expressions of interleukin(IL)-2 and interfereron(IFN)-γ.Results Pathological changes showed that fiber proliferative atherosclerotic plaques were found in the aorta of atherosclerosis group,with inflammatory cells infiltrating in the local lesion.Real time RT-PCR analysis showed that the expression of Kv1.3 mRNA in the aorta was increased significantly in the atherosclerosis rats than that in the controls([31.48±8.64]×10-3 vs.[3.28±0.79]×10-3,P<0.05).Western blotting analysis showed that the protein expression of Kv1.3,IL-2 and IFN-γ in the aorta were also increased significantly in the atherosclerotic rats than that in the controls(Kv1.3[0.691±0.067] vs.[0.490±0.052],IL-2 [0.611±0.055] vs.[0.299±0.058],IFN-γ [0.759±0.050] vs.[0.273±0.052],P<0.01 n=8).Conclusion The expression of Kv1.3 potassium channels is increased in the plaques of atherosclerotic rats.Kv1.3 may play an important role in the development and progression of atherosclerosis.国家自然科学基金资助项目(30871045

鲤科鱼类寄生头槽绦虫核糖体dna间隔序列的比较研究

头槽绦虫(Bothriocephalus)隶属于绦虫纲假叶目;广泛寄生于海水及淡水鱼类.传统分类主要依据形态学特征;如头节的形状;节片大小及生殖系统的形态结构等;这些特征在头槽绦虫中往往极不稳定;特别是由于固定方法的不同而极易造成虫体的形态差异;从而造

便携式气相色谱仪薄壳环型加热装置的设计与性能研究

设计了一种用于便携式气相色谱仪的色谱柱均温加热装置，对装置的性能做了考察。该装置是一个外径91mm、内径89．7mm、高50mm的铝筒，内壁贴有两层硅橡胶，两个硅橡胶层之间绕有443gl的电阻丝，最大功耗为109W，可以实现线性程序升温（90℃／min），最高温度180℃。OV-1毛细管柱（9m×0．25mm i．d．×0．3μm）绕在铝筒外侧。用C6-C12正构烷烃作样品，考察了仪器的的性能，分流进样，FID检测。保留时问重复误差≤2．7％（n-5），峰面积重复误差≤11％（n-5）。结果表明，本装置能够用于沸点低于210℃物质的分离分析

便携式气相色谱仪薄壳环型加热装置的设计与性能研究

设计了一种用于便携式气相色谱仪的色谱柱均温加热装置，对装置的性能做了考察。该装置是一个外径91mm、内径89．7mm、高50mm的铝筒，内壁贴有两层硅橡胶，两个硅橡胶层之间绕有443gl的电阻丝，最大功耗为109W，可以实现线性程序升温（90℃／min），最高温度180℃。OV-1毛细管柱（9m×0．25mm i．d．×0．3μm）绕在铝筒外侧。用C6-C12正构烷烃作样品，考察了仪器的的性能，分流进样，FID检测。保留时问重复误差≤2．7％（n-5），峰面积重复误差≤11％（n-5）。结果表明，本装置能够用于沸点低于210℃物质的分离分析

γ-干扰素释放试验和PPD试验在处置学校结核病暴发疫情中的应用分析

近年来,我国各地在校学生结核病的暴发疫情时有发生[1-3],给学生的身心健康造成了极大伤害。在调查处置学校结核病暴发疫情中,γ-干扰素释放试验和PPD试验作为细胞免疫学诊断结核的主要方法之一,分别通过外周血T淋巴细胞释放γ-干扰素和体内T淋巴细胞产生免疫应答来判断个体感染结核菌程度[4],为筛查发现高危密切接触者、及时控制疫情提供了科学依据。为比较γ-干扰素释放试验

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies