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High prevalence of multidrug-resistance in Acinetobacter baumannii and dissemination of carbapenemase-encoding genes bla_(OXA-23-like),bla_(OXA-24-like)and bla_(NDM-1) in Algiers hospitals 被引量:20
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作者 Khadidja Khorsi Yamina Messai +2 位作者 Moufida Hamidi Houria Ammari Rabah Bakour 《Asian Pacific Journal of Tropical Medicine》 SCIE CAS 2015年第6期439-447,共9页
Objective:To assess and characterize antibiotic resistance in Acinetobacter baumannii strains recovered from 5 health-care facilities in Algiers.Methods:Antibiotic susceptibility testing was performed by agar diffusio... Objective:To assess and characterize antibiotic resistance in Acinetobacter baumannii strains recovered from 5 health-care facilities in Algiers.Methods:Antibiotic susceptibility testing was performed by agar diffusion and agar dilution methods,resistance genes were identified by PCR and sequencing,and molecular typing of isolates was carried out by enterobacterial repetitive intergenic consensus-PCR(ERIC-PCR).Results:Among 125 tested isolates,117(93.6% ) were multidrug-resistant.of which 94(75.2% ) were imipenem resistant.The bla_(ADC)and bla_(OXA-51-like) genes were detected in all isolates,in association with ISAba I sequence in 84% and 8% (imipenem resistant) of isolates,respectively.The bla_(OXA-23-like) and bla_(OXA-24-like)carbapenemase genes were delected in 67.02% and 20.21% of imipenem-resistant isolates,respectively.The bla_(OXA-23-like) gene is linked to ISAba1 or ISAba4 elements.The metallo-β-lactamase NDM-1 gene was found in 10(10.6% ) imipenem-resisianl strains from three hospitals,it is linked to ISAba125 clement in nine strains.Extended spectrum β-lactamases production was not detected.Imipenem and cefotaxime resistance phenolypes could not be transferred to Escherichia coli by conjugation.Outer membrane protein CarO gene was not delected in four imipenem-resisianl isolates.The aac(6')-1b.sul1,sul2,tetA and tetB genes were present in 5.31% .36.17% .77.65% .1.06% and 65.92% of strains,respectively.Class 1 integrons were detected in 23.4% strains.KRIC-PCR typing showed a genetic diversity among bla_(OXA-23-like) and bla_(OXA-24-like) positive strains,while clonality was observed among bla_(NDM-1)positives.Conclusions:This study highlighted the high prevalence of imipenem resistance in Acinetobacter baumannii in Algiers hospitals mediated mainly by bla_(OXA-23-like),bla_(OXA-24-like),and bla_(NDM-1) genes. 展开更多
关键词 Acinetobacter baumannii multidrug-resistance CARBAPENEMASE bla_(OXA-23-like) bla_(OXA 24 like) bla_(NDM-1) carO Hospital Algiers
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基于MDR模型的喹诺酮类抗生素对蛋白核小球藻联合毒性作用评估 被引量:1
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作者 闫嘉宁 孟庆俊 +2 位作者 魏海生 李琳 郝研宁 《环境科学研究》 CAS CSCD 北大核心 2024年第8期1846-1857,共12页
为考察新污染物中喹诺酮类抗生素混合物的联合毒性效应,以常见的氧氟沙星(Ofloxacin,OFXL)、环丙沙星(Ciprofloxacin,CIP)、诺氟沙星(Norfloxacin,NFXL)3种喹诺酮类抗生素为供试品,通过96 h急性毒性试验测定3种抗生素对蛋白核小球藻(Chl... 为考察新污染物中喹诺酮类抗生素混合物的联合毒性效应,以常见的氧氟沙星(Ofloxacin,OFXL)、环丙沙星(Ciprofloxacin,CIP)、诺氟沙星(Norfloxacin,NFXL)3种喹诺酮类抗生素为供试品,通过96 h急性毒性试验测定3种抗生素对蛋白核小球藻(Chlorella pyrenoidosa)生长抑制的单一毒性及二元和三元混合体系(共计20组)的联合毒性,通过等效线图法、浓度加和模型(CA)、独立作用模型(IA)、模型偏移率(MDR)和组合指数法评价二元和三元混合体系抗生素的相互作用类型。结果表明:①3种喹诺酮类抗生素对蛋白核小球藻在96 h均呈现明显的生长抑制,以半数效应浓度EC_(50)的负对数(pEC_(50))作为判断毒性大小的指标,毒性呈NFXL(pEC_(50)=-2.02)>CIP(pEC_(50)=-2.12)>OFXL(pEC_(50)=-2.23)的特征。②混合体系毒性相互作用类型以协同作用为主,毒性相互作用类型与混合体系组分浓度比、毒性效应区域和污染物浓度范围有关。混合体系中混合物组分浓度比最接近1∶1时,协同作用最强,毒性最大。③混合体系在低浓度范围(0%~30%)时,毒性相互作用类型以加和作用为主;在中高浓度范围(30%~100%)时,毒性相互作用随混合体系的不同而呈现出不同类型。研究显示,环境水体中喹诺酮类抗生素对蛋白核小球藻有一定的毒性效应,且抗生素二元、三元混合体系的协同毒性效应呈毒性增大的趋势。 展开更多
关键词 喹诺酮类抗生素 联合毒性效应 浓度加和模型 模型偏移率(mdr)
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Expression of multidrug-resistance associated proteins in human retinoblastoma treated by primary enucleation 被引量:3
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作者 Li-Juan Tang Li-Jun Zhou +4 位作者 Wen-Xin Zhang Jian-Yan Lin Yong-Ping Li Hua-Sheng Yang Ping Zhang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2018年第9期1463-1466,共4页
AIM: To reveal the expression of multidrug-resistance associated proteins: glutathione-S-transferase π(GSTπ), P-glycoprotein(P-gp) and vault protein lung resistance protein(LRP) in retinoblastoma(RB) witho... AIM: To reveal the expression of multidrug-resistance associated proteins: glutathione-S-transferase π(GSTπ), P-glycoprotein(P-gp) and vault protein lung resistance protein(LRP) in retinoblastoma(RB) without any conservative treatment before primary enucleation and to correlate this expression with histopathological tumor features. METHODS: A total of 42 specimens of RB undergone primary enucleation were selected for the research. Sections from the formalin-fixed, paraffin-embedded specimens were stained with HE and immunohistochemistry to detect the expression of GSTπ, P-gp and LRP.RESULTS: GSTπ was expressed in 39/42(92.86%) RBs and in 9/9(100%) well-differentiated RBs. P-gp/GSTπ was found in 30(71.42%) of 42 RBs. Totally 9(21.43%) tumors were well differentiated and 33(78.57%) were poorly differentiated. Totally 15(35.71%) eyes had optic nerve(ON) tumor invasion, 36(85.71%) had choroidal tumor invasion, and 14(33.33%) had simultaneous choroidal and ON invasion. There was no statistically significant relationship between P-gp, GSTπ, LRP positivity and the degree of ocular layer tumor invasion and ON tumor invasion(P〉0.05). CONCLUSION: RB intrinsically expresses GSTπ, P-gp and LRP. GSTπ expression is positive in 100% welldifferentiation ones, so in which way it is correlated with differentiation. But the other two proteins expressions are not related to tumor differentiation and to the degree of tumor invasion. GSTπ may be a new target of chemotherapy in RB. 展开更多
关键词 glutathione-S-transferase π P-GLYCOPROTEIN vault protein lung resistance protein RETINOBLASTOMA multidrug-resistance proteins
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High Prevalence of Multidrug-Resistance MRSA and VRSA of Different Infections from AI-Jumhuory Teaching Hospital Patients in Mosul 被引量:1
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作者 Ibrahim H. Yaseen Adeeba Y. Shareef Awwad Sh. Daoud 《Journal of Life Sciences》 2013年第12期1255-1259,共5页
Staphylococcus aureus is major human pathogen causing large variety of infections worldwide. This study carried out to isolate S. aureus from different clinical cases, also detection of MRSA prevalence and VRSA emerge... Staphylococcus aureus is major human pathogen causing large variety of infections worldwide. This study carried out to isolate S. aureus from different clinical cases, also detection of MRSA prevalence and VRSA emergence, in addition to shedding light on strains that have to be multidrug resistance against various antibiotics, The clinical samples were collected from AI-Jumhuory Teaching Hospital patients in Mosul, isolates identification were achieved by conventional procedures including biochemical and physiological tests, and the specific latex agglutination test. The sensitivity pattern achieved by using disk diffusion technique, for MRSA and VRSA detection oxacillin-disk (1 μg) and vancomycin-disk (30 μg) were used respectively. Results revealed, among 17 S. aureus isolates, 7 (41%) were mostly isolated from patients with wound and burn infections. Isolates had high resistance rate against ampicillin (100%) and cefotaxime (81%), and lower resistance rate against several antibiotics. MRSA was 88% of total isolates, 93.3% of MRSA were multidrug resistance to 3-9 of antibiotics. Six isolates (40%) of MRSA were VRSA. It is concluded that antibiotics other than vancomycin can be used as anti-MRSA agents after a sensitivity test to prevent the prevalence of VRSA, the major cause of this chemotherapy problems maybe irrational and indiscriminate use of broad-spectrum antibiotics. 展开更多
关键词 multidrug-resistance MRSA VRSA Mosul.
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EFFECTS OF IN VIVO GENE TRANSDUCTION OF ANTI-MDR1 RIBOZYME IN COMBINATION WITH CHEMOTHERAPY ON MULTIDRUG-RESISTANT HUMAN LYMPHOMA GROWTH IN MICE
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作者 徐东平 王福生 +1 位作者 Ohnuma Takao 金磊 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2003年第2期92-97,共6页
Objective: To study the effect of adenovirus- mediated transfer of anti-MDR1 ribozyme on the reversal of multidrug resistant (MDR) phenotype of P-glycoprotein (P-gp)-positive Daudi human Burkitt lymphoma both in vitro... Objective: To study the effect of adenovirus- mediated transfer of anti-MDR1 ribozyme on the reversal of multidrug resistant (MDR) phenotype of P-glycoprotein (P-gp)-positive Daudi human Burkitt lymphoma both in vitro and in vivo. Methods: A recombinant adenovirus expressing 196Rz (Adv-196Rz) was developed and functionally evaluated. SCID mice inoculated subcutaneously (s.c.) with 5?06 Daudi/MDR20 cells were locally treated with Adv-196Rz or mock virus (Adv-Mock) at the multiplicity of infection (MOI) of 400 PFU once a day for 3 consecutive days. Then the mice were intraperitoneally (i.p.) administrated with vincristine (VCR) 450ng/g for 5 consecutive days. Results: In vitro employment of Adv-196Rz was able to interrupt MDR1 transcription, to inhibit P-gp expression and to restore drug sensitivity to VCR of Daudi/MDR20 cells. In vivo, 87.5% (7/8) of Daudi/MDR20-inoculated mice treated with Adv-Mock+ VCR developed palpable tumor by the 6th week and died or were sacrificed (because of tumor weight > 10% of body weight) by the 11th week. In contrast, among 9 Daudi/MDR20-inoculated mice treated with Adv-196Rz + VCR, only 3 developed tumor by the 11th, 13th and 14th week, respectively. 66.7% of mice survived >120 days in tumor-free. The survival difference between the two groups was very significant (P<0.01). Conclusion: Adenovirus- mediated Transfer of 196Rz can revert drug resistance of MDR tumor cells both in vitro and in vivo. Adv-196Rz may prove useful as an adjuvant in the chemotherapy of P-gp mediated MDR human tumors. 展开更多
关键词 mdr RIBOZYME Cancer Gene therapy
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Smear-Negative Multidrug-Resistant Tuberculosis a Significance Hidden Problem for MDR-TB Control: An Analysis of Real World Data 被引量:1
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作者 Jingming Liu Wei Wang +2 位作者 Jing Xu Mengqiu Gao Chuanyou Li 《Journal of Tuberculosis Research》 2014年第2期90-99,共10页
Purpose: The drug resistance pattern in tuberculosis (TB) is still under investigated. We analyzed the clinical data from the patients with smear positive TB and applied the model to predict the patients with smear-po... Purpose: The drug resistance pattern in tuberculosis (TB) is still under investigated. We analyzed the clinical data from the patients with smear positive TB and applied the model to predict the patients with smear-positive TB. Materials and Methods: Medical records information of 6977 cases was included from 11,950 inpatients from January 2009 to November 2013. The cases data were divided into a training set, test set and prediction set. Logistic regression analysis was applied to the training set data to establish a prediction classification model, the effect of which was then evaluated using the test set by receiver operating characteristic (ROC) analysis. The model was then applied to the prediction set to identify incidence of snMDR-TB. Results: Sixteen factors which correlate with MDR-TB-including frequency of hospitalization, province of origin, anti-TB drugs, and complications, were identified from the comparison between SP-TB and spMDR-TB. The area under the ROC curve (AUC) of the prediction model was 0.752 (sensitivity = 61.3%, specificity = 83.3%). The percentage of all inpatients with snMDR-TB (snMDR-TB/Total) was 28.7% ± 0.02%, while that of all SN-PTB with snMDR-TB (snMDR-TB/SN-PTB) was 26.5% ± 0.03%. The ratio of snMDR-TB to MDR-TB (snMDR-TB/MDR-TB) was 2.09 ± 0.33. Conclusion: snMDR-TB as an important source of MDR-TB is a significant hidden problem for MDR-TB control and can be identified by the prediction model. A kind of vicious circle with a certain delay effect exists between snMDR-TB and MDR-TB. To better control MDR-TB, it is necessary to pay greater attention to snMDR-TB, conduct further research and develop targeted therapeutic strategies. 展开更多
关键词 mdr-TB snmdr-TB SN-PTB Real World DATA
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Role of Na^+/H^+ exchanger isoform-1 in doxorubicin-induced multidrug-resistance HL-60 cell line
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作者 孔佩艳 常城 +5 位作者 陆俊羽 胡川闽 魏立 陈幸华 张怡 刘红 《Journal of Medical Colleges of PLA(China)》 CAS 2004年第2期86-93,共8页
Objective: To explore the roles of intracellular pH value (pHi) and sodium-hydrogen exchanger isoform-1 (NHE-1) in the mechanism of multidrug resistance of leukemia cells. Methods: Multidrug resistant cell line HL-60 ... Objective: To explore the roles of intracellular pH value (pHi) and sodium-hydrogen exchanger isoform-1 (NHE-1) in the mechanism of multidrug resistance of leukemia cells. Methods: Multidrug resistant cell line HL-60 induced by doxorubicin(DOX) (called as HL-60/DOX cells) and their parent cell line HL-60 were employed as experiment group and control group. The proliferation and chemosensitivity of the cells were studied by MTT assay, and the expression of multidrug resistance protein (MRP) was detected by immol/Lunocytochemistry. Meanwhile, pHi was measured by spectrofluorometery with a fluorescence dye BCECF-AM. Based on the pHi recovery curve after intracellular acid loading, the activity of NHE-1 was analyzed. The expression of NHE-1 mRNA and MRP mRNA were determined by semi-quantitative RT-PCR. Cell apoptosis was observed with terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL), and apoptotic DNA was extracted and electrophoresed. Results: ① The IC 50 values for DOX, MTZ, VCR and homoharringtonine(HT), in HL-60/DOX cells were significantly higher than those in HL-60 cells (P<0.01). HL-60/DOX cells expressed abundant MRP, but HL-60 cells did not. ② pHi of HL-60/DOX cells were significantly higher than that of HL-60 cells(P<0.001). The expression and activity of NHE-1 in HL-60/DOX cells were significantly stronger than those of HL-60 cells. ③After administration of the specific NHE-1 inhibitor dimethyl amiloride (DMA) at a certain range of concentrations, compared with HL-60 cells, the rate of growth inhibition of HL-60/DOX cells increased significantly (P<0.05), the drug-sensitivity of HL-60/DOX cells was significantly sensitive (P<0.01), the expression of MRP and MRP mRNA decreased significantly (P<0.01), the apoptosis rate increased significantly (P<0.01). Conclusion: NHE-1 is involved in the drug-resistant mechanisms of multidrug-resistant HL-60 cells induced by DOX. The specific NHE-1 inhibitor DMA can partly reverse the multidrug resistance of HL-60 cells induced by DOX. 展开更多
关键词 multidrug-resistance leukemia cells sodium-hydrogen exchanger isoform-1 intracellular pH value REVERSION
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Reversion of Multidrug-Resistance by Proteasome Inhibitor Bortezomib in K562/DNR Cell Line
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作者 Hui-han Wang Ying-chun Li +4 位作者 Ai-jun Liao Bei-bei Fu Wei Yang Zhuo-gang Liu Xiao-bin Wang 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2011年第1期69-73,共5页
Objective:To observe the reversion of multi-drug resistance by proteasome inhibitor bortezomib in K562/DNR cell line and to analyze the possible mechanism of reversion of multidrug-resistance.Methods:MTT method was ... Objective:To observe the reversion of multi-drug resistance by proteasome inhibitor bortezomib in K562/DNR cell line and to analyze the possible mechanism of reversion of multidrug-resistance.Methods:MTT method was used to determine the drug resistance of K562/DNR cells and the cellular toxicity of bortezomib.K562/DNR cells were cultured for 12 hours,24 hours and 36 hours with 100 μg/ml DNR only or plus 4 μg/L bortezomib.The expressions of NF-κB,IκB and P-gp of K562/DNR were detected with Western blot method,the activity of NF-κB was tested by ELISA method and the apoptosis rate was observed in each group respectively.Results:The IC50 of DNR on cells of K562/S and K562/DNR groups were 1.16 μg/ml and 50.43 μg/mL,respectively.The drug-resistant fold was 43.47.The IC10 of PS-341 on Cell strain K562/DNR was 4 μg/L.Therefore,4 μg/L was selected as the concentration for PS-341 to reverse drug-resistance in this study.DNR induced down-regulation of IκB expression,up-regulation of NF-κB and P-gp expression.After treatment with PS-341,a proteasome inhibitor,the IκB degradation was inhibited,IκB expression increased,NF-κB and P-gp expression decreased in a time dependent manner.Compared to DNR group,the NF-κB p65 activity of DNR+PS-341 group was decreased.Compared to corresponding DNR group,DNR induced apoptosis rate increases after addition of PS-341 in a time dependent manner.Conclusion:Proteasome inhibitor bortezomib can convert the leukemia cell drug resistance.The mechanism may be that bortezomib decreases the degradation of IκB and the expression of NF-κB and P-gp,therefore induces the apoptosis of multi-drug resistant cells. 展开更多
关键词 BORTEZOMIB NF-ΚB Multi-drug resistance mdr1 gene P-GP K562 cells
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Identification, Synthesis, Isolation and Spectral Characterization of Multidrug-Resistant Tuberculosis (MDR-TB) Related Substances
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作者 Sureshbabu Jayachandra Madhuresh Kumar Sethi +4 位作者 Vipin Kumar Kaushik Vijayakrishna Ravi Saiprasad Kottolla Vikas Chandra Dev Purbita Chakraborty 《Green and Sustainable Chemistry》 2018年第2期190-207,共18页
Several related substances were detected at trace level in (2R)-2,3-dihydro-2-methyl-6-nitro-2-[[4-[4-[4-(trifluoromethoxy)phenoxy]-1-piperidinyl] phenoxy] methyl]imidazo[2, 1-b]oxazole drug substance by a newly devel... Several related substances were detected at trace level in (2R)-2,3-dihydro-2-methyl-6-nitro-2-[[4-[4-[4-(trifluoromethoxy)phenoxy]-1-piperidinyl] phenoxy] methyl]imidazo[2, 1-b]oxazole drug substance by a newly developed high-performance liquid chromatography method. All related substances were characterized rapidly but some impurities were found to be intermediates. Proposed structures were further confirmed by characterization using NMR, FT-IR, and HRMS techniques. Based on the spectroscopic data;unknown related sub-stances were characterized as 1-(Methylsulfonyl)-4-[4-(trifluoromethoxy) phenoxy]piperidine;4-{4-[4-(Tri-fluoromethoxy)-phenoxy]piperidin-1-yl}phenol and 4-{4-[4-(trifluoromethoxy)phenoxy]piperidin-1-yl}phenyl methane sulfonate;4-Bromophenyl methane sulfonate, Ethyl 3,6-dihydro-1(2H)-pyridine carboxylate, (2S)-3-(4-Bromophenoxy)-2-hydroxy-2-methylpropyl methane sulfonate, (2S)-3-(4-Bromophenoxy)-2-methylpropane-1,2-diyldimethane-sulfonate, (2S)-2-Methyl-3-(4-{4-[4-(trifluoromethoxy) phenoxy]-piperidin-1-yl} phenoxy)-propane-1,2-diyldimethane sulfonate, (S)-3-(4-Bromophenoxy)-2-methyl-propane-1,2-diol and corresponding Enantiomer, (2R)-2-[(4-Bromo-phenoxy)methyl]-2-methyloxirane and (2R)-2-[(4-bromophenoxy)methyl]-2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b][1,3]oxazole. A possible mechanism for the formation of these related substances is also proposed. 展开更多
关键词 Asymmetric SYNTHESIS TUBERCULOSIS (TB) Human Immunodeficiency Virus (HIV) MYCOBACTERIUM TUBERCULOSIS MYCOBACTERIUM africanus MYCOBACTERIUM BOVIS Directly Observed Treatment Short (DOTS) High Prevalence of Multi-Drug-Resistant (mdr) and Extensively Drug Resistant (XDR)
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国际EPC热轧工程中MDR的应用
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作者 王震 赵晓辉 +2 位作者 余慧敏 柴佐华 王家兴 《一重技术》 2024年第4期73-74,35,28,共4页
以国际EPC热轧工程项目为例,详细介绍项目进度计划管理中MDR的实际应用,重点探讨在大型项目设计阶段进度计划管理实施方面的一些方法和经验;指出国际项目必须精细化、精准化、可量化管理,为类似国际工程项目提供经验,以进一步提高企业... 以国际EPC热轧工程项目为例,详细介绍项目进度计划管理中MDR的实际应用,重点探讨在大型项目设计阶段进度计划管理实施方面的一些方法和经验;指出国际项目必须精细化、精准化、可量化管理,为类似国际工程项目提供经验,以进一步提高企业的国际竞争力。 展开更多
关键词 EPC 热轧 进度计划管理 mdr
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南京机场2015-2018年MDRS重要天气概率预报情况统计分析
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作者 张舒阳 《中国民航飞行学院学报》 2024年第5期57-61,共5页
本文对南京机场2015至2018年MDRS启动及重要天气概率预报情况进行了统计。南京机场的复杂天气以大雾和雷暴强降水为主,1月份也会出现较强的冰雪天气影响航班运行。就评估结果而言,预报命中的天气中,不准确率(预报误差超过4h)低于20%,预... 本文对南京机场2015至2018年MDRS启动及重要天气概率预报情况进行了统计。南京机场的复杂天气以大雾和雷暴强降水为主,1月份也会出现较强的冰雪天气影响航班运行。就评估结果而言,预报命中的天气中,不准确率(预报误差超过4h)低于20%,预报效果较好,此外大雾天气预报的漏报率最高,而冰雪天气预报的准确率最高。 展开更多
关键词 mdrS 概率预报 准确率
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CYP3A7与MDR1基因多态性与镇痛效应的关系研究
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作者 邓乾 唐艳平 +2 位作者 谭国芳 刘江洪 李国宏 《中国现代药物应用》 2024年第5期35-38,共4页
目的 分析CYP3A7、MDR1基因多态性与镇痛效应之间的关系。方法 回顾性分析87例行腹部手术患者的一般临床资料,术后均采用舒芬太尼镇痛,对影响患者术后镇痛效应的相关因素进行分析。结果 87例行腹部手术的患者中,术后轻度疼痛(轻度疼痛组... 目的 分析CYP3A7、MDR1基因多态性与镇痛效应之间的关系。方法 回顾性分析87例行腹部手术患者的一般临床资料,术后均采用舒芬太尼镇痛,对影响患者术后镇痛效应的相关因素进行分析。结果 87例行腹部手术的患者中,术后轻度疼痛(轻度疼痛组)45例、术后中重度疼痛(中重度疼痛组)42例。两组的年龄、性别、美国麻醉医师协会(ASA)分级以及CYP3A7基因多态性比较差异无统计学意义(P>0.05);两组MDR1 2677G>T/A基因多态性比较差异有统计学意义(P<0.05)。将轻度疼痛组与中重度疼痛组患者具有统计学意义的单因素纳入Logistic回归模型进行多因素分析,结果表明MDR1 2677G>T/A GG、GA、TA、AA为术后镇痛效应的影响因素(OR=0.998、1.078、1.044、1.038,P<0.05)。结论 MDR1基因多态性对患者术后镇痛效应可产生影响,临床在制定镇痛方案时应该综合考虑患者基因型等相关因素制定个体化的镇痛治疗方案。 展开更多
关键词 基因多态性 CYP3A7 mdr1 镇痛效应
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Multidrug-Resistant of Escherichia coli and Salmonella spp. Strains in Chicken Feces Intended for Consumption in Open Spaces of Ouagadougou, Burkina Faso
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作者 Stéphanie Lynseh Carine Sita Bénao Dabiré Amana Métuor +7 位作者 Abdoul Karim Ouattara Rahimatou Yasmine Wendkouni Tiemtoré Nicolas Ouédraogo Blandine Ouédraogo Rhaina Olivia Badini Lionel Eliada Benoit Bambara Serge Sougué Jacques Simporé 《Open Journal of Applied Sciences》 2024年第4期881-892,共12页
Resistant bacteria can be transmitted to humans through feces or contaminated meat from local chickens. Bacterial strains were isolated from the intestinal contents of 400 local chicken samples from various sales site... Resistant bacteria can be transmitted to humans through feces or contaminated meat from local chickens. Bacterial strains were isolated from the intestinal contents of 400 local chicken samples from various sales sites. These strains were then characterized using bacteriological and biochemical methods to identify resistant strains. In a study conducted in Ouagadougou, we systematically collected chicken fecal samples from 20 locations across the city, followed by isolation and identification of Salmonella spp. using specific enrichment and culture methods, as well as Escherichia coli. Bacterial strains were characterized using antibiotic resistance profiles were determined through agar diffusion tests, revealing sensitivity or resistance to a range of antibiotics based on established scientific criteria. The results showed that out of the 400 samples collected, 81.25% and 63.5% were contaminated by Escherichia coli and Salmonella spp., respectively. Among these, 86.15% of identified Escherichia coli and 50.78% of Salmonella spp. displayed resistance to at least one tested antibiotic. Among 280 Escherichia coli isolates identified resistant to at least one antibiotic, 31.07% were resistant to cefotaxime (CTX), 20.35% to ceftazidime (CAZ), 21.07% to ceftriaxone (CTR), 75% to amoxicillin clavulanic acid (AMC), 23.57% aztreoname (ATM) and 27.14% were resistant to imipenem (IMP). In the case of the 129 Salmonella spp. isolates resistant to at least one tested antibiotic, 34.88% were resistant to CTX;41.08% to CAZ;35.65% to CTR, 92% to AMC, 39.53% to ATM and finally 47.28% were resistant to IMP. Our study revealed high prevalence of resistance in bacterial strains isolated from local chickens sold outdoors in Ouagadougou. These findings raise significant public health concerns, due to the possible transmission of these resistant strains to humans through the consumption of contaminated meat, thus complicating the treatment of bacterial infections. 展开更多
关键词 multidrug-resistANT CHICKEN OUAGADOUGOU Escherichia coli Salmonella spp. Antibiotic
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Clinical Efficacy and Safety Analysis of Tigecycline in the Treatment of Acute Exacerbation of Chronic Obstructive Pulmonary Disease Combined with Multidrug-Resistant Acinetobacter baumannii Infection
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作者 Hongbing Wang 《Journal of Clinical and Nursing Research》 2024年第5期194-199,共6页
Objective:To study the clinical efficacy and safety of tigecycline in the treatment of acute exacerbation of chronic obstructive pulmonary disease(COPD)combined with multidrug-resistant Acinetobacter baumannii infecti... Objective:To study the clinical efficacy and safety of tigecycline in the treatment of acute exacerbation of chronic obstructive pulmonary disease(COPD)combined with multidrug-resistant Acinetobacter baumannii infection.Methods:113 patients with acute exacerbation of COPD combined with multidrug-resistant Acinetobacter baumannii infection were recruited between January 2021 and January 2023,and given tigecycline treatment.The total effective rate,lung function indexes,related biochemical index levels,and the incidence rate of adverse reactions were observed after the treatment.Results:After the treatment,100 patients were cured,1 case with apparent effect,2 cases were effective,10 cases were ineffective,and the total effective rate was 91.15%.The post-treatment CRP(21.22±3.35 mg/L),PCT(3.18±1.11 ng/L),CRE(76.36±9.24μmol/L),and ALT(37.76±6.99 U/L)were significantly improved as compared to the pre-treatment(P<0.05).After treatment,10 cases of vomiting(8.85%),13 cases of nausea(11.50%),4 cases of diarrhea(3.53%),1 case of abdominal pain(0.88%),and 2 cases of allergy(1.77%)were observed in 113 patients.Conclusion:Tigecycline therapy for patients with acute exacerbation of COPD combined with multidrug-resistant Acinetobacter baumannii infection not only has significant therapeutic efficacy but also has a high degree of safety. 展开更多
关键词 TIGECYCLINE Chronic obstructive pulmonary disease Acute exacerbation multidrug-resistant Acinetobacter baumannii infection
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川芎嗪对转基因多药耐药细胞K562/MDR耐药性的逆转作用 被引量:13
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作者 马海英 赵瑾瑶 +1 位作者 金伟 孔力 《吉林大学学报(医学版)》 CAS CSCD 北大核心 2009年第4期599-603,共5页
目的:研究川芎嗪(TMP)与环孢菌素A(CsA)单独及联合逆转人红白血病多药耐药细胞K562/MDR的多药耐药性(MDR),并进一步探讨其耐药逆转机制。方法:分别以倍比稀释后不同浓度的TMP(506 400 mg·L^-1)和CsA(0.5256 mg·L^-... 目的:研究川芎嗪(TMP)与环孢菌素A(CsA)单独及联合逆转人红白血病多药耐药细胞K562/MDR的多药耐药性(MDR),并进一步探讨其耐药逆转机制。方法:分别以倍比稀释后不同浓度的TMP(506 400 mg·L^-1)和CsA(0.5256 mg·L^-1)作用于体外培养的K562/MDR细胞72 h,采用MTT法检测细胞生长率,确定TMP和CsA的非细胞毒性剂量;采用非细胞毒性剂量,实验分为5组:G1组(TMP+ADM+K562/MDR)、G2组(CsA+ADM+K562/MDR)、G3组(TMP+CsA+ADM+K562/MDR)、阴性对照组(以K562/S代替K562/MDR)、空白对照组(以1640培养基代替药物),检测各组细胞生长抑制50%的ADM浓度,即IC50,计算耐药倍数和逆转倍数;利用荧光分光光度法检测各组细胞内ADM浓度;流式细胞术检测跨膜糖蛋白P-gp的表达情况。结果:TMP及CsA的非细胞毒性剂量分别为320和2.0 mg·L^-1,K562/MDR细胞的耐药倍数为19.2倍;TMP及CsA均能降低K562/MDR细胞的耐药性,逆转倍数分别为5.2及9.6倍,并且两者联合应用,逆转倍数为15.6倍;TMP和CsA单独及联合应用均能明显增加K562/MDR细胞内ADM浓度;TMP及CsA单独应用均能降低K562/MDR细胞P-gp的表达,并且两者联合应用使K562/MDR细胞P-gp的表达率明显降低,与阴性对照组比较差异有显著性(P〈0.01)。结论:TMP和CsA单独及联合应用可逆转K562/MDR细胞对化疗药物ADM的MDR,且两者具有协同作用。其逆转机制可能为降低P-gp水平,升高细胞内ADM浓度,增强对ADM的敏感性,从而发挥治疗肿瘤的作用。 展开更多
关键词 川芎嗪 环孢菌素A 多药耐药逆转 K562/mdr细胞
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乳腺癌原发灶和淋巴结转移灶MDR1 mRNA表达及与临床指标的相关性分析 被引量:6
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作者 卢列盛 宋科瑛 +3 位作者 王瑞涛 虞佩 柯卫峰 李克 《肿瘤》 CAS CSCD 北大核心 2009年第3期276-279,共4页
目的:通过对乳腺癌原发灶和淋巴结转移灶的多药耐药基因1(multi-drug resistance gene 1,MDR1)mRNA表达差异及与临床指标相关性进行分析,探讨肿瘤多药耐药和侵袭转移之间可能存在的相关性。方法:应用实时荧光定量PCR(real-time fluoresc... 目的:通过对乳腺癌原发灶和淋巴结转移灶的多药耐药基因1(multi-drug resistance gene 1,MDR1)mRNA表达差异及与临床指标相关性进行分析,探讨肿瘤多药耐药和侵袭转移之间可能存在的相关性。方法:应用实时荧光定量PCR(real-time fluorescence quantitative PCR,RFQ-PCR)方法检测21例浸润性乳腺癌患者的原发灶和淋巴结转移灶MDR1 mRNA的表达。结果:MDR1 mRNA在淋巴结转移灶中的表达水平明显高于原发灶(P<0.05),并且在淋巴结转移灶和原发灶中的表达有相关性(r=0.795,P<0.05)。MDR1 mRNA表达与雌激素受体(estrogen receptor,ER)、孕激素受体(progesterone receptor,PR)、CerbB2、肿瘤大小和淋巴结转移个数等临床指标无相关性(P>0.05)。结论:MDR1 mRNA表达可能与肿瘤的侵袭转移有关。 展开更多
关键词 乳腺肿瘤 基因 mdr 肿瘤浸润 肿瘤转移
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RNAi抑制肾癌细胞MDR1基因表达及对顺铂化疗耐药的逆转 被引量:6
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作者 郝怡鑫 贺铮雯 +3 位作者 杜楠 鲁琼 肖文华 沈茜 《肿瘤》 CAS CSCD 北大核心 2010年第2期115-118,共4页
目的:研究RNA干扰(RNA interference,RNAi)对肾癌细胞多药耐药基因1(multidrug resistance,MDR1)表达的抑制作用,并分析干扰前后肾癌细胞对顺铂(cisplatin)敏感度的变化。方法:根据MDR1基因序列设计3条小干扰RNA(small in-terfering RNA... 目的:研究RNA干扰(RNA interference,RNAi)对肾癌细胞多药耐药基因1(multidrug resistance,MDR1)表达的抑制作用,并分析干扰前后肾癌细胞对顺铂(cisplatin)敏感度的变化。方法:根据MDR1基因序列设计3条小干扰RNA(small in-terfering RNA,siRNA),转染肾癌A498细胞;RT-PCR法检测转染前后MDR1 mRNA表达水平的变化,筛选出干扰效率最高的siRNA序列;进而利用慢病毒包装siRNA重组质粒,感染A498细胞,RT-PCR法筛选沉默效果最好的细胞株进行克隆;Western印迹法检测MDR1蛋白表达水平;MTT法检测干扰前后顺铂对半数细胞抑制浓度(half inhibitory concentration,IC50)的变化。结果:3条siRNA序列均能不同程度地抑制细胞MDR1基因的表达,其中siRNA-1序列能更有效地封闭MDR1基因,使MDR1 mRNA表达水平下降67%;筛选得到稳定转染的细胞株与未干扰细胞株相比,MDR1蛋白表达量明显下降(P<0.01),并使顺铂对细胞的IC50值降低约83.37%(P<0.01)。结论:RNAi能有效抑制肾癌A498细胞MDR1基因的表达,并可显著增加其对顺铂的敏感度,从而使肾癌细胞化疗耐药逆转成为可能。 展开更多
关键词 肾肿瘤 RNA 小分子干扰 基因 mdr 顺铂 A498细胞
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MDR基因及MDR基因编码产物在咽喉部恶性黑色素瘤中表达及其意义 被引量:7
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作者 陈曦 季天海 +3 位作者 姚丽青 杨颈松 邓军 张哉根 《中国现代医学杂志》 CAS CSCD 2002年第22期13-15,17,共4页
目的 :研究多药耐药 (mnlti-drugresistance ,MDR)基因胎盘型谷胱甘肽 -S -转移酶 (GST -π)和DNA拓朴酶Ⅱ (TopoⅡ )以及MDR基因编码产物P -糖蛋白 (Pgp)、在咽喉部恶性黑色素瘤中的表达及其意义。方法 :应用链霉素亲生物素 -过氧化物... 目的 :研究多药耐药 (mnlti-drugresistance ,MDR)基因胎盘型谷胱甘肽 -S -转移酶 (GST -π)和DNA拓朴酶Ⅱ (TopoⅡ )以及MDR基因编码产物P -糖蛋白 (Pgp)、在咽喉部恶性黑色素瘤中的表达及其意义。方法 :应用链霉素亲生物素 -过氧化物酶标S -P法检测 2 8例咽喉部恶性黑色素瘤中Pgp、GST -π和TopoⅡ的表达 ,分析MDR基因及MDR基因编码产物阳性表达率与肿瘤主要临床病理特征的关系。结果 :2 8例标本中Pgp、GST -π和TopoⅡ的表达率分别为 35 .7%、5 7.1%和 4 6 .4 % ,相互间差异无显著性 (P >0 .0 5 )。Pgp、GST -π和TopoⅡ的表达与性别、年龄、肿瘤大小无明显相关 (P >0 .0 5 ) ,与AJC分级显著相关 (P <0 .0 5 )。结论 :Pgp、GST -π和TopoⅡ等多因素联合作用是咽喉部恶性黑色素瘤多药耐药的主要作用机理 ,其表达在化疗敏感性预测中具有必要性和可行性。 展开更多
关键词 恶性黑色素瘤 多药耐药 mdr 喉部肿瘤 咽部肿瘤
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复方三根制剂对MDR细胞株K562/ADR和K562/VCR逆转作用的研究 被引量:19
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作者 谢长生 周维顺 +2 位作者 冯正权 郭勇 吴良村 《中国实验方剂学杂志》 CAS 2003年第4期26-30,共5页
目的 :研究复方中药———复方三根制剂对多药耐药 (MDR)细胞株的逆转作用。方法 :应用MTT比色法 ,观察复方三根制剂对MDR细胞的逆转作用。运用流式细胞仪 (FCM) ,测定其对耐药细胞积聚和外排阿霉素 (ADR)的影响 ,以及对耐药株细胞表达p... 目的 :研究复方中药———复方三根制剂对多药耐药 (MDR)细胞株的逆转作用。方法 :应用MTT比色法 ,观察复方三根制剂对MDR细胞的逆转作用。运用流式细胞仪 (FCM) ,测定其对耐药细胞积聚和外排阿霉素 (ADR)的影响 ,以及对耐药株细胞表达p gp的影响。结果 :复方三根制剂可部分恢复K5 6 2 ADR和K5 6 2 VCR耐药细胞对ADR的敏感性 ,而对VCR抗药性的逆转作用不明显 ;可增加K5 6 2 ADR和K5 6 2 VCR耐药细胞内ADR的积聚 ,并对外排ADR有一定影响 ;可部分下调p gp的表达。结论 :复方三根制剂可部分逆转耐药细胞的抗药性。 展开更多
关键词 复方三根制剂 多药耐药(mdr) 逆转P-gp
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耐药相关基因MDR1、MRP、LRP及其表达产物P-gp、MRP、LRP在非小细胞肺癌组织中的表达及意义 被引量:13
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作者 左云 黄建安 +1 位作者 穆传勇 沈冬 《临床肿瘤学杂志》 CAS 2006年第12期921-928,934,共9页
目的:研究探讨非小细胞肺癌(NSCLC)组织和癌旁组织中多药耐药基因1(multidrug resistance gene1,MDR1)、多药耐药相关蛋白(multidrug resistance-related proteins,MRP)、肺耐药蛋白(lung resistance protein,LRP)mRNA及其相应蛋白P-gp... 目的:研究探讨非小细胞肺癌(NSCLC)组织和癌旁组织中多药耐药基因1(multidrug resistance gene1,MDR1)、多药耐药相关蛋白(multidrug resistance-related proteins,MRP)、肺耐药蛋白(lung resistance protein,LRP)mRNA及其相应蛋白P-gp、MRP、LRP的表达情况及临床意义。方法:运用聚合酶链反应(RT-PCR)、免疫组织化学法(IHC)检测43例NSCLC组织及癌旁组织标本中耐药基因MDR1、MRP、LRPmRNA及其蛋白P-gp、MRP、LRP的表达水平。结果:MDR1、MRP和LRP mRNA3种基因在43例肿瘤组织中的表达率分别为79.06%(34/43)、65.17%(28/43)和86.05%(37/43),癌旁组织中的表达率分别为20.00%(3/15)、13.33%(2/15)和13.33%(2/15);P-gp、MRP和LRP3种耐药蛋白在肺癌组织中的表达率分别为74.42%(32/43)、67.44%(29/43)和88.37%(38/43),癌旁组织中的表达率分别为13.33%(2/15)、20.00%(3/15)和6.67%(1/15),上述3种基因及其蛋白在肺癌组织与癌旁组织的表达差异有显著性(P<0.05)。肺癌组织中既存在耐药基因MDR1、MRP和LRP的共表达,也存在耐药蛋白P-gp、MRP和LRP的共表达,3种基因与其相应蛋白表达密切相关。肺腺癌组织中MDR1及其蛋白P-gp、LRPmRNA表达率较高,与其它病理类型相比差异有显著性(P<0.05),MRPmRNA及其蛋白MRP表达与肺癌病理类型、临床分期和组织学分级无关(P>0.05)。结论:NSCLC存在着广泛的原发性多药耐药现象,耐药基因MDR1、MRP和LRPmRNA及其相应蛋白参与了肺癌多药耐药的形成,检测多药耐药基因可为指导临床用药提供一定的理论依据及策略。 展开更多
关键词 非小细胞肺癌 化疗 多药耐药 mdr1 P-GP MRP LRP
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