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基因,MDR

基因,MDR的相关文献在2000年到2020年内共计115篇,主要集中在肿瘤学、基础医学、神经病学与精神病学 等领域,其中期刊论文115篇、专利文献86763篇;相关期刊54种,包括中国防痨杂志、中国病理生理杂志、国际检验医学杂志等; 基因,MDR的相关文献由483位作者贡献,包括刘长安、刘雅洁、张积仁等。

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论文:86763 占比:99.87%

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基因,MDR

-研究学者

  • 刘长安
  • 刘雅洁
  • 张积仁
  • 杨纯正
  • 王树滨
  • 陈孝平
  • 隋广杰
  • 丁玎
  • 乔淑凯
  • 任惠民
  • 期刊论文
  • 专利文献

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    • 胡志军; 吴希静; 潘晓龙; 崇慧峰; 朱娟娟; 赵哲; 唐吉斌
    • 摘要: 目的 检测临床分离碳青霉烯类耐药大肠埃希菌的耐药基因型,并对其同源性进行分析,研究其流行情况.方法 收集铜陵市人民医院2012年9月至2016年10月临床分离碳青霉烯类耐药大肠埃希菌,采用VITEK-2 Compact全自动微生物鉴定仪进行鉴定,改良Hodge试验检测碳青霉烯酶表型,EDTA双纸片协同试验进行金属酶初筛,聚合酶链反应(PCR)检测碳青霉烯酶基因(blaKPC、blaIMP、blaVIM、blaNDM和blaOXA-48),并对阳性扩增产物进行基因测序;同源性分析采用肠杆菌科基因间重复一致序列聚合酶链反应技术(ERIC-PCR).结果 共收集碳青霉烯类耐药大肠埃希菌25株,8株改良Hodge试验阳性,13株金属酶初筛试验阳性,其中4株携带blaNDM-1基因,1株携带blaIMP-4基因,1株携带blaKPC-2基因;ERIC-PCR检测分为10种型别.结论 碳青霉烯类耐药大肠埃希菌的耐药机制主要是产金属酶,携带NDM-1型碳青霉烯酶大肠埃希菌需重点监测;碳青霉烯类耐药大肠埃希菌未在医院引起克隆流行.
    • 陶春梅; 龚雅利
    • 摘要: 目的 分析临床感染铜绿假单胞菌的基因型别、耐药特点以及对碳青霉烯类抗生素的耐药机制.方法 收集重庆市沙坪坝区陈家桥医院2011年6月至2017年7月共6年分离的280株铜绿假单胞菌,主要来源于呼吸内科和ICU病房的痰液标本,进行ERIC-PCR(肠杆菌基因间保守重复序列聚合酶链式反应)分型及药敏试验分析,并检测12种主要的碳青霉烯酶基因的携带情况.结果 分型结果表明主要存在A、G、H三种优势型别的流行,细菌对抗生素的耐药率普遍低于全国耐药监测数据,对碳青霉烯类抗生素亚胺培南和美罗培南的平均不敏感率分别为10.4%和7.1%.在35株碳青霉烯类抗生素不敏感菌株中,碳青霉烯酶IMP和VIM的携带率分别为8.57%和5.71%.结论 肺部感染以及A、G、H三种优势型别细菌是铜绿假单胞感染防控的重点对象,耐碳青霉烯类抗生素菌株中主要携带IMP和VIM两种常见的碳青霉烯酶基因,但阳性率较低.但碳青霉烯类抗生素耐药率逐年升高,仍应引起重视.
    • 陈盛植
    • 摘要: [目的]探讨氟桂利嗪治疗小儿癫痫的疗效及其对多药耐药基因(MDR1) mRNA表达的影响.[方法]选取本院2013年1月至2015年12月收治的小儿癫痫100例作为研究对象,随机分为对照组与观察组,每组各50例.对照组采取常规抗癫痫药物治疗,观察组在对照组基础上联合氟桂利嗪干预,比较两组临床疗效、不同时间点癫痫发作频率、治疗前后脑电图评价情况及外周血MDR1 mRNA表达水平.[结果]观察组治疗总有效率82.00%显著高于对照组的62.00% (P<0.05);两组治疗前后脑电图改善情况比较差异均无统计学意义(P>0.05);观察组治疗1个月、3个月癫痫发作频率,治疗3个月后外周血MDR1 mRNA水平较治疗前均明显下降,差异有统计学意义(P<0.05),且观察组上述指标均明显优于对照组同时间点对应指标(P<0.05).[结论]氟桂利嗪辅助治疗小儿癫痫疗效较好,能显著减少癫痫发作频率,同时能有效逆转MDR1 mRNA表达.
    • 徐凯进; 嵇仲康; 胡海洋; 毕晟; 胡飞枢; 郑琳; 金秀媛; 徐文杰; 王淑婷
    • 摘要: Objective To analyze the epidemiological characteristics of Mycobacterium strains and drugresistance gene characteristics in Mycobacterium tuberculosis strains from 12 counties in Zhejiang Province,China.Methods From January,2012,to June,2016,a total of 2803 sputum positive samples (positive staining that confirmed growth of acid-fast bacilli) were collected from patients newly diagnosed with TB in Zhejiang Province.Mycobacteria Identification Array Kits and M.tuberculosis Drug Resistance Detection Array Kits were used to further identify and characterize the strains in each sample.Results We identified 2598 of the 2803 strains (92.7%),as Mycobacterium tuberculosis and 205 strains (7.3 %) as NTM.NTM strains were further identified as follows:Mycobacterium intracellulare,101 isolates;Mycobacterium kansasii,50 isolates;Turtle/Mycobacterium abscessus,24 isolates;Mycobacterium avium,16 isolates;Mycobacterium fortuitum,4 isolates;light yellow Mycobacte rium,1 isolate.Among the 2598 M.tuberculosis strains there were 326 (12.5%) INH-resistant strains,254 (9.8%) RFP-resistant strains,and 173 (6.7%) MDR TB strains.Among the drug-resistant strains of M.tuberculosis,81.1% (279/344) of the INH-resistant mutations were related to katG315,and 84 (60.0%) of 140 RFP-resistant mutations were associated with rpoB531.Conclusion Among the 2803 strains collected from patients in 12 counties of Zhejiang Province,378 (13.5%) were designated as either MDR TB or NTM.In addition,katG315 was the main point mutation associated with INH resistance in M.tuberculosis strains,and rpoB531 was the main point mutation for RFP resistance.Mycobacterium strain identification and drug-resistance testing are important in enhancing regulation and prevention of TB in basic medical institutions.%目的 了解浙江省12个区(县)分枝杆菌菌种流行情况及结核分枝杆菌的INH、RFP耐药相关基因特征.方法 收集2012年1月至2016年6月浙江省12个区(县)初诊为菌阳肺结核患者的2803株临床分离菌株标本,运用基因芯片技术进行菌种鉴定和INH、RFP耐药检测.结果 2803份菌株中,NTM占7.3% (205株),前6位菌种为:胞内分枝杆菌101株,堪萨斯分枝杆菌50株,龟-脓肿分枝杆菌24株,鸟分枝杆菌16株,偶然分枝杆菌4株,浅黄色分枝杆菌1株;2598株MTB中耐INH者占12.5%(326株),耐RFP者占9.8%(254株),MDR占6.7%(173株).425株MTB耐药突变位点结果中,katG 315位点占INH耐药突变的81.1% (279/344),rpoB 531位点占RFP耐药突变的56.6% (155/274).结论 通过涂片诊断肺结核患者中有13.5% (378/2803)为NTM和MDR感染,INH耐药的主要突变位点是katG 315,RFP耐药的主要突变位点是rpoB 531,在基层医疗机构积极推行分枝杆菌菌种鉴定技术和耐药检测技术将有利于加快我国结核病疫情控制.
    • 宋艳华; 高孟秋; 李琦; 马丽萍; 陆宇; 刘荣梅; 付育红; 陈红梅
    • 摘要: 目的 测定结核分枝杆菌(MTB)临床分离株对链霉素(Sm)、卡那霉素(Km)、阿米卡星(Am)、卷曲霉素(Cm)的敏感性,了解其耐药程度和交叉耐药水平,并进一步探讨耐药及交叉耐药与MTB的rrs和rpsL基因突变的关系.方法 采用微量平板Alamar Blue检测(MABA)法,检测64株选自北京胸科医院的MTB临床分离菌株的Sm、Km、Am和Cm的最小抑菌浓度(minimum inhibitory concentration,MIC)值;并且对这些菌株rrs和rpsL基因进行序列测定.结果 64株MTB临床分离株中,52株对Sm耐药,其中有42株(80.8%)发生rpsL基因突变,包括32株(76.2%)为128A→G(Lys43Arg),其MIC值均≥128μg/ml;9株(21.4%)263A→G(Lys88Arg),1株(2.4%)263A→T(Lys88Met),MIC值介于4~64μg/ml.9株菌rrs基因514A→C突变,其中,8株MIC值介于4~8 μg/ml,1株MIC值为2μg/ml.在2株Sm耐药株(MIC值是4μg/ml)中没有发现rpsL基因、rrs基因530区及rrs基因1400区突变.18株菌检测到rrs基因1401A→G突变,均对Km和Am高度耐药.其中,15株为rrs基因1401A→G单突变,3株合并rrs基因其他位点突变.18株菌对Sm、Km、Am均耐药,且对Km和Am均高度耐药.18株rrs基因1401A→G突变菌株中,13株菌对Km、Am、Cm均耐药,且均为Km、Am高度耐药耐合并Cm低度耐药;5株菌对Cm敏感(MIC值均为2.5 μg/ml).64株菌株均有rpsL基因363A→G突变,相应的密码子为121位AAA→AAG突变,其编码的氨基酸均为赖氨酸(Lys).结论 MTB的rpsL基因Lys43Arg、Lys88Arg/Met突变分别可能与Sm高度和中度耐药相关;rrs基因514A→C突变可能与Sm低度耐药相关.rrs基因1401A→G联合514A→C突变,或联合rpsL基因突变可能与Sm、Km、Am均耐药相关.rrs基因1401A→G是Km高度耐药及交叉耐药的分子基础,也可能是Km和Am与Cm部分交叉耐药的分子基础.
    • 高漫; 李蒙; 焦向阳
    • 摘要: 目的:评价耐多药基因检测利福平、异烟肼药物敏感性的可行性。方法收集该院2014年6~12月94例结核病患者标本采用耐多药基因检测仪检测利福平、异烟肼药物敏感性并与BACTEC MGIT 960培养仪检测结果进行比较分析。结果2种方法同时检测利福平、异烟肼药物敏感性符合率为91.5%(86/94),符合率较高。结论耐多药基因检测结核分枝杆菌药物敏感性灵敏度高,特异性强,对结核病患者的早期及菌阴患者的及时、有效治疗具有重要意义。
    • 于云莉; 史梦婷; 楚兰
    • 摘要: 目的:通过对难治性癫痫患者外周血中多药耐药基因1(MDR1)、P 糖蛋白(P - gp)及谷胱甘肽 S 转移酶(GST - pi)的检测探讨难治性癫痫的发病机制;检测在不同发作类型、V - EEG 中癫痫样放电部位及用药方式的患者中此3项指标的水平。方法选取2012年3月—2013年3月贵州医科大学附属医院临床确诊的散发性的难治性癫痫患者31例(难治性癫痫组),另选择同期在本院接受抗癫痫药物控制良好的癫痫患者33例(治疗有效组),荧光定量法检测外周血 MDR1、GST - pi基因相对表达量,采用流式细胞术检测外周血 MDR1的表达产物P - gp的表达。结合临床特点与长程视频脑电图研究癫痫患者的发作类型、异常放电部位及用药方式,比较不同类型癫痫患者以上3项指标的表达情况。结果难治性癫痫组 MDR1、GST - pi基因相对表达量和白细胞P - gp高于治疗有效组,差异均有统计学意义(P ﹤0.01)。无论是治疗有效组还是难治性癫痫组,不同发作类型患者 MDR1、GST - pi基因相对表达量及白细胞P - gp比较,差异均无统计学意义(P ﹥0.05)。不同 V - EEG 异常放电患者 MDR1、GST - pi基因相对表达量及白细胞P - gp比较,差异均无统计学意义(P ﹥0.05)。不同用药方式患者 MDR1基因相对表达量比较,差异无统计学意义(P ﹥0.05);不同用药方式患者GST - pi基因相对表达量和白细胞P - gp比较,差异均有统计学意义(P ﹤0.05),其中2种和3种用药方式GST - pi基因相对表达量均高于1种用药方式,3种用药方式白细胞P - gp高于1种和2种用药方式,差异均有统计学意义(P ﹤0.05)。结论癫痫患者外周血中GST - pi、P - gp或可成为难治性癫痫联合用药的耐药指标之一;癫痫患者外周血中 MDR1、GST - pi及P - gp与癫痫发作类型、癫痫样放电在 V - EEG 中的各种分布情况无明显相关性。%Objective To investigate the pathogenesis of refractory epilepsy by detecting the expression of MDR1, P - gp and GST - pi in peripheral blood of patients with refractory epilepsy and to detect the expression levels of the three indexes in patients with different types of epilepsy seizure,different epileptic discharge areas shown by V - EEG and different types of medication. Methods We enrolled 31 patients who were definitely diagnosed with sporadic refractory epilepsy in the Affiliated Hospital of Guizhou Medical University from March 2012 to March 2013 as the refractory group. Another 33 epilepsy patients who were treated well by antiepileptic drug in the same period were also enrolled as the effective group. Fluorescent quantitation method was employed to detect the change of relative gene expression of MDR1 and GST - pi in peripheral blood,and flow cytometry was employed to detect the expression of P - gp,an expression product of MDR1 in peripheral blood. Comparison was made in the expression of the three indexes among patients with different types of epilepsy in combination with clinical features,types of epilepsy seizure and abnormal discharge areas shown by long - term video EEG and different medications. Results Refractory group was higher(P ﹤ 0. 01)than effective group in the gene relative expression of MDR1 and GST - pi and P - gp level of white cells. The patients with different epilepsy seizure types in two groups were no significantly different( P ﹥ 0. 05) in the gene relative expression of MDR1 and GST - pi and P - gp level of white cells. Patients with different abnormal discharge areas shown by V - EEG were not significantly different(P ﹥ 0. 05)in the gene relative expression of MDR1 and GST - pi and P - gp level of white cells. Patients with different medications were not significantly different( P ﹥ 0. 05) in the gene relative expression of MDR1;patients with different medications were significantly different( P ﹤ 0. 05) in the gene relative expression of GST - pi and P - gp level of white cells,with patients taking 2 or 3 kinds of medicine higher(P ﹤ 0. 05)than patients taking 1 kind of medicine in the gene relative expression of GST - pi and patients taking 3 kinds of medicine higher( P ﹤ 0. 05) than patients taking 1 or 2 kinds of medicine in expression of P - gp of white cells. Conclusion GST - pi and P - gp in the peripheral blood of epilepsy patients may have the potential to become drug resistance indexes of the combined drug therapy for refractory epilepsy;the levels of MDR1,GST - pi and P - gp in the peripheral blood of epilepsy patients have no obvious relevancy with the type of epilepsy seizure and the various distribution of epilepsy discharge areas shown by V - EEG.
    • 李勇; 檀碧波; 范立侨; 赵群; 王冬; 刘羽; 刘庆伟
    • 摘要: Objective To test the expression of miR-185 in gastric cancer tissues and cell lines and to investigate the mechanism of miR-185 on the MDR of gastric cancer. Methods Samples of gastric cancer and para -cancer tissues were obtained from 20 patients who accepted gastric cancer resection operation in the Fourth Hospital of Hebei Medical University from March to May in 2014. The expressions of miR-185 in gastric cancer tissues,para-cancer tissues,SGC7901,ADR resistant cell line SGC7901/ADR,gastric epithelial cell line GES -1 were tested with fluorescent quantitation PCR. Then SGC7901/ADR was transfected by miR -185 mimics or irrelevant control sequence, and sensitivity of transfected SGC7901/ADR to chemotherapeutic drugs( ADR,5-FU,L-OHP)was measured. The expressions of mRNA and their protein in MDR related genes MDR1/P-gp,MRP-1,GST-π,LRP were determined by PCR and Western blotting. Results Relative expressions of miR-185 was(0. 910 ± 0. 142) in para-cancer tissues,and(0. 243 ± 0. 045) in cancer tissue,which showed significant difference(t=20. 025,P<0. 001). Relative expressions of miR -185 in GES -1,SGC7901,SGC7901/ADR cells were (0. 903 ± 0. 117),(0. 630 ± 0. 101),(0. 191 ± 0. 030) respectively,which also showed significant difference( F=46. 850, P<0. 001). Among these cell lines,relative expressions of miR-185 in SGC7901,SGC7901/ADR were lower than that in GES-1,and expressions of miR -185 in SGC7901/ADR was lower than that in SGC7901(P <0. 05). Inhibition rates of ADR,5-FU and L -OHP to SGC7901/ADR cells obviously varied with different transfecting methods ( P <0. 05 ). The inhibitions rate of ADR,5 -FU and L -OHP to SGC7901/ADR transfected by miR -185 mimic were higher than those to SGC7901/ADR transfected by irrelevant control sequence or without transfection. By different transfecting methods,the mRNA and protein expression levels of MDR1/P - gp, MRP -1 and GST - π in SGC7901/ADR were significantly different( P <0. 05 ). The mRNA and protein expression levels of MDR1/P-gp,MRP-1 and GST-πin SGC7901/ADR transfected by miR-185 mimic were lower than those in SGC7901/ADR transfected by irrelevant control sequence or without transfection. Conclusion miR-185 is down-regulated in gastric cancr cells,and upregulating miR-185 can enhance sensitivity of gastric cancer cells to chemotherapeutic drugs. The mechanism may be that miR -185 could regulate the expression of some MDR genes.%目的:检测miR-185在胃癌组织及细胞株中的表达,探讨miR-185在胃癌多药耐药性( MDR)发生机制中的作用。方法选取2014年3—5月于河北医科大学第四医院行胃癌切除术的20例患者胃癌及癌旁组织标本,荧光定量PCR技术检测胃癌及癌旁组织和人胃腺癌细胞株SGC7901、正常胃上皮细胞株GES-1、耐阿霉素( ADR)的胃癌MDR细胞株 SGC7901/ADR 的 miR -185表达水平。采用 miR -185模拟物或无关对照序列转染细胞株SGC7901/ADR,检测其对化疗药物ADR、5-氟尿嘧啶(5-FU)、草酸铂( L-OHP)的敏感性,荧光定量 PCR和Western blotting技术检测多药耐药基因MDR1/P-gp、MRP-1、GST-π、LRP的mRNA及蛋白表达水平。结果癌旁组织和胃癌组织miR-185相对表达水平分别为(0.910±0.142)、(0.243±0.045),差异有统计学意义( t=20.025, P<0.001)。细胞株GES -1、SGC7901、SGC7901/ADR miR -185相对表达水平分别为(0.903±0.117)、(0.630±0.101)和(0.191±0.030),差异有统计学意义(F=46.850,P<0.001)。其中,细胞株SGC7901、SGC7901/ADR miR-185相对表达水平低于GES-1,细胞株SGC7901/ADR miR-185相对表达水平低于SGC7901(P<0.05)。ADR、5-FU和L-OHP对不同转染处理后的细胞株SGC7901/ADR抑制率比较,差异均有统计学意义( P<0.05)。其中, ADR、5-FU和L-OHP对miR-185模拟物转染的细胞株SGC7901/ADR抑制率高于未转染和无关对照序列转染( P<0.05)。经不同转染处理后,细胞株SGC7901/ADR多药耐药基因MDR1/P-gp、MRP-1和GST-π mRNA和蛋白相对表达水平比较,差异有统计学意义( P<0.05)。其中,miR-185模拟物转染的细胞株SGC7901/ADR多药耐药基因MDR1/P-gp、MRP-1和GST-π mRNA和蛋白相对表达水平低于未转染和无关对照序列转染( P<0.05)。结论胃癌细胞miR-185表达下调,通过上调miR-185的表达可提高胃癌细胞对化疗药物的敏感性,其机制可能是miR-185调控部分多药耐药基因的表达。
    • 张玲
    • 摘要: 结核病是严重危害公众健康的全球性公共卫生问题,我国是全球第二大结核病高负担国家。第5次全国流行病学调查显示,我国约5.5亿人口曾感染结核,每年新发生活动性肺结核110万~150万例,其中传染性肺结核65万例。耐药结核仍较严重,耐多药结核(MDR-TB)患者12万例,耐多药(MDR)率6.8%,广泛耐药(XDR)率2.1%。对结核病的早期诊断、规范治疗及控制耐药结核是降低结核发病率的有效措施。由于临床表现不典型、潜伏性结核感染及结核耐药问题导致我国的结核疫情防控形势依然严峻。实验室检查是诊断结核的重要手段,常用的实验室诊断技术包括细菌学检测方法、分子生物学检测方法、免疫学检测方法等。在治疗过程中,需要考虑的重要因素有:早期正确的治疗、督导用药及耐药的尽早发现。对于 MDR-TB患者治疗期间,建议使用痰涂片和培养检查进行治疗监测。对耐药结核患者应及早异烟肼和利福平耐药基因检测及快速结核菌培养药物敏感性试验。%Tuberculosis is a global problem that seriously harms public health.China is the second largest number of high tuberculosis(TB)burden in the world.According to the fifth national TB epidemiological survey,there are about 550 million people who are infected with TB,as well as some 11-15 million new cases,including 6.5 million active TB patients.Drug-resistant TB is still serious,there are 120 thousand multi drug resistant TB(MDR-TB) patients,in which multi drug resistant(MDR)rate is 6.8%,extensively drug resistant(XDR)rate is 2.1%.Early diagnosis,standard treatment and drug-resistant tuberculosis control are the effective measures to reduce the incidence of tuberculosis.The situation of tuberculosis prevention and control is still severe,due to lack of typical clinical manifestations,latent tuberculosis infection and drug resistance.The laboratory examination is the most important approach to TB diagnosis.The laboratory diagnosis technique involved bacteriology,molecular biological,immunological methods,and others.In the course of treatment,consideration includes the factors such as correct early treatment, steering medication,early diagnosing and avoiding drug resistance.During the treatment of patients with MDR-TB,the use of sputum smear and culture examination are suggested for treatment monitoring.For drug-resistant tuberculosis patients should get early detection of isoniazid and rifampicin resistant gene,and they should have rapid bacterial culture and drug sensitive test.
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