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1.
目的:探讨羟基红花黄色素A(HSYA)对于香烟烟雾提取物(CSE)诱导人胚肺成纤维细胞(MRC-5)炎症因子及TGF-β1表达的影响及HSYA缓解气道重塑的机制。方法:用CSE刺激MRC-5细胞建立损伤模型,细胞分七组:单纯HSYA组、Sham组、CSE模型组、CSE+低剂量HSYA组、CSE+中剂量HSYA组、CSE+高剂量HSYA组、CSE+阳性对照药红霉素组。以Real-time-PCR技术检测TNF-α、IL-1β及IL-6和TGF-β1m RNA的表达水平;蛋白质印迹法(western blot)检测细胞p38MAPK磷酸化的水平。结果:加入CSE刺激12h后,MRC-5细胞的炎症因子TNF-α、IL-1β、IL-6及TGF-β1m RNA水平明显升高,与模型组相比,HSYA能够明显抑制CSE诱发的TNF-α、IL-1β、IL-6及TGF-β1m RNA水平的升高。结论:HSYA可抑制CSE诱导MRC-5的炎症因子及TGF-β1的表达升高。 相似文献
2.
目的:探讨活络祛痹贴膏的抗炎镇痛作用及其机制研究,为其在临床中应用提供实验依据.方法:采用小鼠热板法、小鼠耳肿胀法、大鼠足肿胀法,贴敷给药7天,考察小鼠镇痛抗炎作用,采用Elisa测定足肿胀大鼠血清中白介素-6(IL-6)和抗肿瘤坏死因子(TNF-α)的表达水平.结果:活络祛痹贴膏高剂量组(10g·kg-1)可显著提高热板法小鼠痛阈值,显著减轻小鼠的耳肿胀度和大鼠足肿胀度(P＜0.05).活络祛痹贴膏中剂量组(7.5g·kg-1)可显著降低大鼠血清中IL-6和TNF-α的表达水平(P＜0.05).结论:活络祛痹贴膏具有抗炎、镇痛作用,可能通过影响血清中IL-6和TNF-α含量来实现. 相似文献
3.
目的:探讨氯沙坦对百草枯诱导HK-2细胞损伤的影响及机制。方法:常规培养HK-2细胞,分为空白对照组:未采用任何药物干预培养24h;模型组:以800μmol/L百草枯培养24h;氯沙坦预治疗组:先以75μmol/L氯沙坦培养1h,再以75μmol/L氯沙坦+800μmol/L百草枯培养24h。观察各组细胞TLR-4、NF-?B、TNF-α、IL-6的表达。结果:与空白对照组相比,模型组TLR-4、NF-?B、TNF-α、IL-6表达升高(P0.05);与模型组相比,氯沙坦预治疗组TLR-4、NF-?B、TNF-α、IL-6表达水平显著降低(P0.05)。结论:氯沙坦预处理能够抵抗百草枯诱导的HK-2细胞损伤,其机制可能与抑制TLR-4/NF-?B信号通路活化,减少炎症因子的表达有关。 相似文献
4.
《黑龙江科技信息》2019,(32)
目的:通过对类风湿关节炎(RA)患者外周血IL-10含量的检测,探讨其联合IL-6、类风湿因子(RF)、C反应蛋白(CRP)、血沉(ESR)在诊断类风湿性关节炎中的临床意义。方法:选取2017年11月至2018年11月30在本院确诊并收治为类风湿关节炎的20例患者作为RA组,另选取同一时期在本院体检中心20例健康者作为健康对照组,ELISA法检测外周血血清中IL-10的浓度。对患者和健康者进行比较,并对患者IL-10与各项免疫学指标进行相关性分析。结果:(1)类风湿关节炎患者IL-6、RF、CRP、ESR浓度均高于健康对照组,而IL-10含量低于健康对照组,差异具有统计学意义(p0.05);(2)RA患者组血清IL-10与血清中的C反应蛋白(CRP)、血沉(ESR)、类风湿因子(RF)、IL-6呈负相关(r=-0.5151,p=0.0201;r=-0.462,p=0.0403;r=-0.743,p=0.0002;r=-0.5524,p=0.0115),表明IL-10与类风湿性关节炎病情严重程度密切相关。结论:IL-10在类风湿性关节炎患者血清中显著降低,检测患者外周血IL-10水平有助于RA患者的早期诊断。 相似文献
5.
目的:探讨黄芪甲甙预处理能否减少异氟醚麻醉下大鼠神经细胞的凋亡及其可能的机制。方法:将实验小鼠随机分为5组,每组4只大鼠:A组:未麻醉组,亦即空白组,用0.9%生理盐水处理;B组:异氟醚组;C、D、E组:黄芪甲甙预处理后异氟醚麻醉组。C、D、E组的处理方法为:异氟醚麻醉前,将大鼠分别灌胃黄芪甲甙溶解液20mg/kg,50 mg/kg,80mg/kg,每隔4h一次,共处理72h。接着,通过采用ELISA与Western blot技术测定血清促炎性因子、NF-κB,caspase-3及BCL-2的蛋白表达水平,考察黄芪甲甙预处理对异氟醚麻醉的影响。结果:与B组相比较,C、D、E组的神经元细胞死亡数量明显减少;在对照组,血清和海马CA1的丙二醛(MDA)水平相对较低。异氟醚B组则显著抑制SOD、活性水平,但促进凋亡的iNOS、NO和MDA的水平增高。相比较,C、D、E组显著地抑制了异氟醚引起的MDA、iNOS和NO的产生,而提高了SOD的活性水平;在对照组,促炎性因子的水平,如肿瘤坏死因子α(TNF-α),白细胞介素6(IL-6),and白细胞介素1β(IL-1β)的水平相对较低。在B组,这些因子的水平明显增高。相对的,在,而B、D组(低剂量和高剂量组),显著降低了这些促炎性因子的释放(P0.01)。与B组相比,C、D、E组的NF-κB及促凋亡标记蛋白Caspase-3水平降低,而抗凋亡标记蛋白BCL-2升高。结论:黄芪甲甙对异氟醚麻醉导致的神经元的凋亡有保护作用,可能与黄芪甲甙的抗氧化应激和抗炎性特性有关。 相似文献
6.
7.
目的:探究腕踝针治疗难治性癌痛对减少癌性爆发痛(Breakthrough cancer pain,BTcP)次数及改善疼痛介质与炎症因子水平的影响.方法:将2019年1月至2021年2月在广西梧州市中医医院接受治疗的103例难治性癌痛患者视为研究对象,以随机数字表法分为两组,甲组采用癌症三阶梯止痛法治疗,乙组在甲组基础上行腕踝针治疗,对比两组临床疗效、治疗前后不同时间点BTcP次数、视觉模拟量表(visual analogue scale,VAS)评分、炎症因子、疼痛介质指标水平.结果:乙组治疗总有效率高于甲组,治疗第2d、第6d与第10d时的VAS评分、肿瘤坏死因子-α(Tumor necrosis factor-α,TNF-α)、白细胞介素-6(lnterleukin-6,IL-6)、白细胞介素-lβ(lnterleukin-1β,IL-1β)水平、5-羟色胺(5-hydroxytryptamine,5-HT)、P物质(Substance P,SP)、前列腺素E2(Prostaglandin E2,PGE2)水平低于甲组,BTcP次数少于甲组(P＜0.05).结论:腕踝针治疗难治性癌痛能够有效缓解疼痛,减少BTcP次数,改善机体炎症因子水平与疼痛介质. 相似文献
8.
急性高原肺水肿血浆TNF-α、IL-6、ET-1的变化及临床意义 总被引：2，自引：0，他引：2
目的了解急性高原肺水肿患者血浆TNF-α、IL-6、ET-1的变化及临床意义.方法采用放射免疫法测定37例急性高原肺水肿患者和30例对照组血浆TNF-α、IL-6、ET-1的变化,并同时测定白细胞数和体温变化.结果急性高原肺水肿患者血浆TNF-α、IL-6、ET-1水平较明显升高(P＜0.01).而且急性高原肺水肿患者外周血白细胞计数、中性粒细胞分类及体温均明显高于对照组(P＜0.01).结论血浆TNF-α、IL-6、ET-1在急性高原肺水肿患者中明显升高,且外周血白细胞计数、中性粒细胞分类和体温也明显升高,说明急性高原肺水肿可能是一非感染性炎症过程. 相似文献
9.
目的:探讨中药复方海珠益肝化纤方对肝纤维化大鼠α-SMA和TGFβ1表达的影响。方法:将60只Wistar健康大鼠随机分为正常对照组、模型对照组、中药治疗组和阳性对照组,各15只。除正常对照组外,余下三组均采用四氯化碳(CCL4)造模8周制备肝纤维化模型。造模成功后,正常对照组和模型对照组给予0.9%生理盐水溶液,阳性对照组予秋水仙碱混悬液(0.25mg/kg/d),中药治疗组予海珠益肝化纤方混悬液(5m L/100g/d),连续用药治疗6周。观察各组大鼠肝功能(AST、ALT)、肝纤维化指标(HA、PCⅢ、IV-C、LN)、α-SMA和TGFβ1的变化。结果:与模型对照组相相比,阳性对照组、中药治疗组大鼠ALT、AST、HA、PCⅢ、IV-C、LN、α-SMA和TGFβ1水平下降(P0.05);与阳性对照组相比较,中药对照组大鼠ALT、AST、HA、PCⅢ、IV-C、LN、α-SMA和TGFβ1水平显著性降低,差异具有统计学意义(P0.05);海珠益肝化纤方组大鼠肝纤维化程度低于秋水仙碱组大鼠。结论:海珠益肝化纤方可降低CCL4诱导的肝纤维化大鼠α-SMA和TGFβ1的表达,抑制肝纤维化的进展。 相似文献
10.
《大众科技》2020,(5)
目的:探讨猫须草水提物(OSE)对尿酸钠诱导的急性痛风关节炎大鼠的抗炎作用。方法:采用尿酸钠溶液注射关节腔建立急性痛风性关节炎模型后,定期记录大鼠关节肿胀度,并测定大鼠全血的白细胞、中性粒细胞、淋巴细胞以及血清和肿胀组织NO水平。结果:与模型组比较,OSE高、中剂量组大鼠致炎后在不同时间点不同程度减轻关节肿胀程度,OSE高、中剂量组大鼠全血白细胞与淋巴细胞水平明显下降(P0.05),但中性粒细胞的降低无显著性差异;OSE高、中、低剂量组显著升高血清血清NO的水平(P0.01),并显著降低踝关节组织NO水平(P0.01)。结论:OSE对尿酸钠所致急性痛风关节炎大鼠的抗炎机制可能与促进组织NO向血液释放并降低血液中白细胞、中性粒细胞和淋巴细胞水平有关。 相似文献
11.
《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
12.
Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
13.
《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
14.
A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
15.
Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
16.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
17.
Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献
18.
Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
19.
Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 相似文献
20.
Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献