Journal Detail Information

1

Cite

Share

Correlations of plasma eotaxin-2, sTNFR Ⅱ and other cytokines levels with the status of metabolic syndrome in type 2 diabetic nephropathy patients treated with maintenance hemodialysis

Ping LU ; Huaxi XU ; Zhaoliang SU

Chinese Journal of Clinical Laboratory Science.2017;35(7):507-510. doi:10.13602/j.cnki.jcls.2017.07.07

Objective To investigate the correlations of plasma eotaxin-2,soluble tumor necrosis factor receptor(sTNFR) Ⅱ and other cytokines levels with the status of metabolic syndrome(MS) in type 2 diabetic nephropathy (DN) patients treated with maintenance hemodialysis(MHD).Methods Thirty type 2 DN patients with stable pathogenetic conditions and MHD treatment for more than 3 months,thirty newly diagnosed and untreated type 2 diabetes(T2D) patients and thirty healthy volunteers were enrolled in the study.The MS related markers,including blood pressure,waist circumference,body mass index,triglyceride(TG),high density lipoprotein cholesterol(HDL-C),fasting blood glucose (FBG),total cholesterol(TC),low density lipoprotein cholesterol(LDL-C) and C reactive protein(CRP),were determined.The expression levels of 40 cytokines were detected with the AAH-INF-G3 antibody microarray,and their correlations with MS related markers were analyzed by the Pearson method.Results The incidence rates of MS in DN patients with MHD and T2D patients were 88.89％ and 33.33％,respectively.Compared with T2D patients and healthy controls,the DN patients had more MS related markers,higher waist circumference and lower body mass index,and their plasma eotaxin-2,I-309 and sTNFR Ⅰ / Ⅱ levels increased significantly.Pearson correlation analysis showed that plasma eotaxin-2 and I-309 levels were positively related to MS risk factors such as TG,FBG and diastolic blood pressure(DBP) levels.Plasma sTNFR Ⅱ and I-309 levels were significantly positively correlated with plasma CRP levels.Conclusion A micro inflammatory state exists in type 2 DN patients with MHD.Abnormal glycolipid metabolism may influence on the immunologic and physiological state of human body,and then form the micro inflammatory state.Eotaxin-2 and I-309 may participate in this chronic and persistent process and further induce renal damage by upregulating sTNFR Ⅰ / Ⅱ levels,which may result in the formation of MS state in type 2 DN patients with MHD.

2

Cite

Share

Diagnostic value of serum PLA2R antibody detection for idiopathic membranous nephropathy: A meta-analysis

Mingjian LIAN ; Rong LU ; Jiaqin ZHANG ; Guolin HONG

Chinese Journal of Clinical Laboratory Science.2017;35(7):545-549. doi:10.13602/j.cnki.jcls.2017.07.18

Objective To evaluate the diagnostic value of serum M-type phospholipase A2 receptor(PLA2R) antibody detection for the diagnosis of idiopathic membranous nephropathy(IMN) by meta analysis.Methods By searching the databases of PubMed,Emabse,Wanfang and CNKI from inception to May,2017,all the literatures referred to serum PLA2R antibody for the diagnosis of IMN in both English and Chinese were reviewed and selected according to the inclusion and exclusion criteria.QUADAS was used to assess the quality of eligible studies.Meta-disc 1.4 was used to analyze heterogeneity and pooled effectsize and Stata 12.0 was used to analyze publication bias.Results A total of 20 studies with high quality were included.Heterogeneity test indicated there was no threshold effect.The pooled sensitivity was 0.69 (95 ％ CI:0.67 to 0.72),the pooled specificity was 0.97 (95 ％ CI:0.96 to 0.98) and the summary area under curve was 0.880.Sensitivity analysis indicated that the result was stable.Deek's funnel plot indicated there was no publication bias.Conclusion The sensitivity of detection of serum PLA2R antibody was acceptable for the diagnosis of IMN with high specificity,so more attention on PLA2R antibody should be paid in the clinical practice.

3

Cite

Share

Distribution characteristics and virulence gene analysis of intestinal and extraintestinal Aeromonas

Shufei LI ; Xiao CHEN ; Yu CHEN

Chinese Journal of Clinical Laboratory Science.2017;35(7):503-506. doi:10.13602/j.cnki.jcls.2017.07.06

Objective To investigate the species distribution and the difference of virulence gene spectra of Aeromonas isolated from intestinal tract and extraintestinal body fluid,and the correlation of their pathogenicity with infection sites.Methods A total of 156 Aeromonas strains isolated from the fecal specimens of patients with acute diarrhea and extraintestinal specimens were collected during May 2013 and September 2015.Eighteen virulence genes in these strains,including hlyA,aerA,act,alt,ast,aexT,ascV,aopP,ascF-G,gcat,tapA,fla,Ser,exu,ahyB,eprCAl,lip and laf,were detected by polymerase chain reaction(PCR).Last,the differences of virulence gene spectra between intestinal and extraintestinal Aeromonas were analyzed.Results Among 156 Aeromonas strains,79 were from fecal specimens,and 77 from extraintestinal specimens.Aeromonas caviae(A.caviae,51.9％) was the most common species in the intestinal strains,while Aeromonas hydrophila(A.hydrophila,48.1％) and A.caviae(39.0％) were the main pathogens in extraintestinal infections.The most prevalent virulence genes in intestinal and extraintestinal Aeromonas were gcat,act,fla,ahyB,exu and lip (＞ 45.57 ％),while aexT,aopP,ascF-G and ascV were less frequently detected (＜ 20.78％).The detection rates of gcat,ahyB,laf,ast,exu,lip,hlyA and aerA genes in intestinal Aeromonas were significantly lower than those in extraintestinal isolates (P ＜ 0.05).The detection rates of gcat,ahyB,exu,lip,eprCAl and hlyA genes in extraintestinal A.hydrophila were significantly higher than those in intestinal A.hydrophila (P ＜ 0.05).The detection rates of lip and hlyA genes in extraintestinal A.caviae were significantly higher than those in intestinal A.caviae (P ＜ 0.05),while that of aopP gene was just the reverse.There was no significant difference in the detection rates of virulence genes between intestinal and extraintestinal Aeromonas veronii.Conclusion There are significant differences in the species distribution and virulence genes of Aeromonas isolated from intestinal and extraintestinal specimens,indicating that clinicians should treat them differentially.

4

Cite

Share

Application of PCR-reverse dot blot hybridization in the diagnosis of vulvovaginal candidiasis and the detection of Candida albicans drug-resistant genes

Xiuqing LIU ; Gefei WANG ; Zhuocheng LI ; Lei HUANG

Chinese Journal of Clinical Laboratory Science.2017;35(7):495-498. doi:10.13602/j.cnki.jcls.2017.07.04

Objective To evaluate the application value of PCR-reverse dot blot hybridization in the identification of Candida and the detection of Candida albicans drug-resistant genes.Methods The vaginal secretion samples from 285 patients with candidal vaginitis and 50 healthy women were collected.The identification of Candida species and their drug susceptibility were detected by the bioMérieux Yeast identification cards and MIC method(Zhengzhou Antu kit),respectively.The identification of Candida species and the mutation of Candida albicans,drug-resistant genes were also detected by the Shenzheng Yaneng test kit(PCR-reverse dot blot hybridization).The drug-resistant genes were also identified by PCR and nucleic acid sequencing.Based on the culture identification,MIC method and nucleic acid sequencing as the contrast methods,the sensitivity,specificity and accuracy of PCR-reverse dot blot hybridization in the identification of Candida species and the mutation detection of Candida albicans drug-resistant genes were evaluated.Results Compared with the bioMérieux Yeast identification method,the sensitivity,specificity,positive predictive value,negative predictive value and total coincidence rate of PCR-reverse dot blot hybridization for detecting six kinds of Candida species,including Candida albicans,Candida glabrata,Candida tropicalis,Candida parapsilosis,Candida krusei and Candida guilliermondii,were above 95％,96％,96％,98％ and 97％,respectively.There was no significant difference in detecting six kinds of Candida species between the two methods (x2 =0.44,0,0,0,0 and 0,respectively,P ＞ 0.05),and there was good consistency between them (Kappa ＞ 0.9).Compared with the MIC method,the sensitivity,specificity,positive predictive value,negative predictive value and total coincidence rate of PCR-reverse dot blot hybridization for detecting the drug resistance of Candida albicans were 98％,88％,98％,88％ and 96％,respectively.There was no significant difference in detecting the drug resistance of Candida albicans between the two methods (x2 =0.17,P ＞ 0.05),and there was good consistency between them (Kappa ＞ 0.8).The results of PCR-reverse dot blot hybridization in detecting the mutation sites of six kinds of Candida albicans drug-resistant genes were 100％ of coincidence with that of the nucleic acid sequencing method.Conclusion The PCR-reverse dot blot hybridization has high consistency with the culture method and the nucleic acid sequencing method in the identification of Candida species and the mutation detection of Candida albicans drug-resistant genes,which is more early and rapid than the traditional detection methods,and may be applied to the auxiliary diagnosis of vulvovaginal candidiasis (VVC).

5

Cite

Share

Application value of modified rapid Carba NP test for the detection of carbapenemase-producing strains

Hongwei YU ; Jing HE ; Kuo CHENG ; Weili MA ; Zixuan YANG ; Junhua FENG ; Jinyan ZHANG

Chinese Journal of Clinical Laboratory Science.2017;35(7):491-494. doi:10.13602/j.cnki.jcls.2017.07.03

Objective To investigate the feasibility of modified rapid Carba NP test for the detection of carbapenemase,and analyze the differences between the modified method and Carba NP test.Methods A total of 264 strains of gram-negative bacillus,including 164 carbapenem-resistant strains and 100 sensitive strains,were collected,and their carbapenemase were detected by Carba NP test and the modified rapid Carba NP test,respectively.The differences between the two tests were evaluated based on PCR as a reference.Results Among 164 carbapenem-resistant strains,carbapenemase gene was detected in 144 strains by PCR.The carbapenemase gene was negative in 100 sensitive strains.Among 164 carbapenem-resistant strains,135 were positive for the Carba NP test,while 130 for the modified rapid Carba NP test.One hundred of sensitive strains were negative for the two Carba NP tests.Compared with the results of PCR,the sensitivity,specificity and Kappa value of the Carba NP test were 91.7％ (132/144),97.5％ (117/120) and 0.886,respectively,while those of the modified rapid Carba NP test were 89.6％ (129/144),99.2％ (119/120) and 0.879,respectively.There was no significant difference in the positive rates between Carba NP test and the modified rapid Carba NP test (x2 =1.45,P ＞ 0.05).Conclusion The modified rapid Carba NP test which has high consistency with the PCR method,is faster and cheaper than the Carba NP test,and may be applied to epidemiologic survey and the early monitoring of nosocomial infections.

6

Cite

Share

Rapid identification and antifungal susceptibility testing of filamentous fungi

Yang PENG ; Chao XU ; Yuyue WANG ; Caizhen HE ; Xin XU ; Yijie MAO ; Weifeng SHI

Chinese Journal of Clinical Laboratory Science.2017;35(7):486-490. doi:10.13602/j.cnki.jcls.2017.07.02

Objective To evaluate the application of matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) technology in the identification of filamentous fungi,and analyze the susceptibility of filamentous fungi to commonly used antibiotics.Methods A total of 100 strains of filamentous fungi were collected and identified rapidly by MALDI-TOF MS.The obtained results were compared with those from microscopic examination.The susceptibility of filamentous fungi was detected by the Etest method.Results Among 100 strains of filamentous fungi identified by MALDI-TOF MS,61 reached to the species level(score≥2.000),36 to the genus level(score between 1.700 and 1.999),and 3 failed to be identified (score ＜ 1.700).There was inconsistent results for one strain of filamentous fungi between MALDI-TOF MS and microscopic examination.The MIC90 of amphotericin B against Epidermophytonfloccosum was 0.19 μg/mL,while that against Aspergillus flavus was above 32 μg/mL.The MIC90 of itraconazole against Trichophyton tonsurans,Microsporum canis and Epidermophytonfloccosum were all below 0.38 μg/mL,while that against Aspergillus niger was above 32 μg/mL.The MIC90 of fluconazol were above 256 μg/mL for most of strains.The MIC90 of voriconazole and caspofungin against Aspergillus fumigatus,Aspergillus flavus,Aspergillus niger,Trichophyton rubrum,Trichophyton tonsurans and Microsporum canis were ≤0.38 μg/mL and ≤ 1 μg/mL,respectively.Conclusion The MALDI-TOF MS technology may be used to identify the filamentous fungi isolated from clinical specimens quickly,accurately and high-throughput.Voriconazole and caspofungin have effective anti-filamentous fungi activity.

7

Cite

Share

Evolution analysis and trend prediction of neuraminidase gene of influenza A/H1N1(09pdm) virus in China from 2009 to 2016

Yue SONG ; Wenjuan YAN ; Kun FANG ; Xiaoshan LI ; Wei LI ; Pingmin WEI

Chinese Journal of Clinical Laboratory Science.2017;35(7):550-554. doi:10.13602/j.cnki.jcls.2017.07.19

Objective To analyze the evolutionary characteristics and predict the variation trend of neuraminidase (NA) gene of influenza A/H1N1 (09pdm) virus in China from 2009 to 2016 in order to provide the basis of assessment for flu vaccines.Methods A total of 1 141 sequences of NA gene of influenza A/H1N1 (09pdm) virus were screened out from the Global Initiative on Sharing All Influenza Data and National Center for Biotechnology Information.The phylogenetic trees and the mutations of amino acids sequences were constructed and analyzed by biological softwares.The prediction for epidemic trend of influenza was analyzed by Bayesian skyline Plot.Results Compared with the sequence of reference strain,the homology of nucleic acid sequence of NA gene decreased year by year from 2009 to 2016.The phylogenetic analysis showed that NA gene clustered nearly on the identical phylogenetic tree in one year.The positive selection pressure site of NA strain was observed by different models in each year except 2012.The dynamics analysis showed that the popularity of influenza A/H1N1 virus may continue to increase to a peak in 2017.Conclusion The amino acid encoded by NA gene of influenza A/H1N1 virus is varying gradually,so the importance of surveillance for influenza virus should be reinforced for every year.

8

Cite

Share

Establishment and application of external quality assessment system for microbial morphology and detection of special drug-resistance in clinical laboratory

Lianhua WEI ; Fengmei ZOU ; Gang LIU ; Yongqing YANG ; Wanxia WANG ; Ling WU ; Junchun LI ; Xin WANG ; Yuqian CHEN ; Xiaoqing CHEN ; Keke LI ; Haixing SHAO ; Jichao ZHU

Chinese Journal of Clinical Laboratory Science.2017;35(7):538-541. doi:10.13602/j.cnki.jcls.2017.07.16

Objective To investigate the establishment,operation and performance of external quality assessment(EQA) system for microbial morphology and detection of special drug-resistance in clinical laboratory,and explore the value of the developed system in clinical application.Methods The pictures of known bacteria and fungi colony,gram staining and acid-fast staining from clinical microbiology were distributed to the participating laboratories in Gansu province twice a year at regular intervals.The pictures of standard knowledge points from CLSI,such as special drug resistance were distributed simultaneously.All the participating laboratories were required to complete the interpretation for the pictures and report their resuhs in a scheduled time.Then the resuhs were summarized and analyzed as 3 modes:complete consistency,general consistency and non-consistency.Results During the 2 years when the EQA system for microbial morphology and detection of special drug-resistance were performed for 24 times,the rate of annual complete consistency increased year by year and reached to 91.3％ in 2015.Conclusion The EQA system based on the examinations of microbial morphology and CLSI standard knowledge points for clinical laboratory may supervise the staff of clinical microbiology laboratories in the hospitals at second grade or above to master the skills of morphological identification and learn CLSI knowledge points,so their professional skills of clinical microbiology could be comprehensively improved.

9

Cite

Share

Verification for performance of anti-dsDNA antibody quantitative ELISA kit

Hui ZHOU ; Chuwen JIANG ; Wei FANG ; Minwen LIANG ; Jinwei HUANG ; Tieying HOU

Chinese Journal of Clinical Laboratory Science.2017;35(7):533-537. doi:10.13602/j.cnki.jcls.2017.07.15

Objective To explore the verification methods for the performance of quantitative detection kit of anti-dsDNA antibodiy with enzyme-linked immunosorbent assay (ELISA).Methods The precision was verified according to the EP15-A2 document approved by the American Clinical and Laboratory Standards Institute(CLSI).The accuracy was verified by detecting the samples of previous external quality evaluation(EQA),compared with the comparative kits and recovery test.The lower limit of detection(LLD) was calculated by the results of blank samples.The cut-off value was verified according to the C28-A3C document approved by CLSI and CNAS-CL39:Guidance on the Application of Accreditation Criteria for the Medical Laboratory Quality and Competence in the Field of Clinical Qualitative Immunology respectively.The improved Doumas method was used to verify the range of linearity.Results The measured intra-assay and inter-assay coefficients of variation were lower than those announced by the manufacturer or the calculated values according to the EP15-A2 document.The coincidence rates for negative and positive EQA samples between detected and expected values were 98.4％ (63/64) and 100％ (20/20) respectively.The total coincidence rate was 98.8％ (83/84).The coincidence rate for negative and positive samples between the results from candidate and comparative kits were 91.2％ (52/57) and 87.0％ (40/46) respectively.The total coincidence rate was 89.3％ (92/103) and the Kappa value was 0.783 (P =0.062),which implied excellent consistency between the two kits.The mean recovery rate was 99.65％.The measured LLD was 0.5 IU/mL which was lower than 1 IU/mL as claimed by the manufacturer.The measured cut-off value according to the CNAS-CL39 document was 18.51 IU/mL,which was close to 20 IU/mL announced by the manufacturer.Based on the C28-A3C method,the cut-off value could be approved.The linear regression equation was Y =0.978 8X-3.125 4,r2 =0.996 1.There was no statistical difference between the intercept (-3.125 4) and 0 (t =-0.772,P =0.483).The range of linearity was from 1.6 to 212.5 IU/mL,which was consistent with the values declared by the manufacturer.All the verifications of the five performances above-mentioned could be passed.Conclusion The precision,accuracy,LLD,cut-off value and range of linearity of the candidate quantitative ELISA kit for anti-dsDNA antibody were consistent with the statement of the manufacturer,which indicated the performance of the kits may meet the requirements of clinic diagnosis and treatment.A series of methods used in this study provided a simple protocol for verifying the performance of quantitative ELISA kits.

10

Cite

Share

Drug resistant mechanism and homology analysis of carbapenem-resistant Klebsiella pneumoniae isolated from different sites of one patient

Yongmei HU ; Mingxiang ZOU ; Jun LI ; Qingya DOU ; Haichen WANG ; Qun YAN ; Wenen LIU

Chinese Journal of Clinical Laboratory Science.2017;35(7):511-513,517. doi:10.13602/j.cnki.jcls.2017.07.08

Objective To investigate the drug resistant mechanism and homology of three strains of carbapenem-resistant Klebsiella pneumoniae (K.pneumoniae) isolated from different sites of one patient.Methods Three strains of carbapenem-resistant K.pneumoniae were isolated from femoral vein catheter tip,wound secretions and sputum of a patient with severe burns,respectively.Their carbapenemase,metallo-β-lactamase (MBL) and drug resistance genes were detected by modified Hodge test,double-disk synergy test and combination disk diffusion and PCR,respectively,and homology and biological typing were analyzed by enterobacterial repetitive intergenic consensus-PCR (ERIC-PCR) assay and multilocus sequence typing (MLST) technology,respectively.Results The carbapenemase and MBL of three strains of carbapenem-resistant K.pneumoniae were negative and positive,respectively.The blaNDM-1 gene was identified from the three strains,but other drug resistance genes such as blanC,blaGES,blaIMP,blaSPM,blaVIM,blaGIM and blaOXA-48 were not detected.ERIC-PCR showed that three isolates belonged to the same genotype,and MLST showed that they were type ST17.Conclusion Carring blaNDM-1 gene is the main cause leading to the drug resistance of three strains of carbapenem-resistant K.pneumoniae,and they belong to the same genotype.

DISPLAY OPTIONS

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share

Cite

Share