Objective MicroRNAs （miRs） are attractive molecules to be considered as one of the blood-based biomarkers for neurodegenerative disorders such as Alzheimer＇s disease （AD）. The goal of this study was to explore th...Objective MicroRNAs （miRs） are attractive molecules to be considered as one of the blood-based biomarkers for neurodegenerative disorders such as Alzheimer＇s disease （AD）. The goal of this study was to explore their potential value as biomarkers for the diagnosis of AD.Methods The expression levels of exosomal miR-135a, -193b, and -384 in the serum from mild cognitive impairment （MCI）, dementia of Alzheimer-type （DAT）, Parkinson＇s disease with dementia （PDD）, and vascular dementia （VaD） patients were measured with a real-time quantitative reverse transcriptase PCR （qRT-PCR） method.Results Both serum exosome miR-135a and miR-384 were up-regulated while miR-193b was down-regulated in serum of AD patients compared with that of normal controls. Exosome miR-384 was the best among the three miRs to discriminate AD, VaD, and PDD. Using the cut-off value could better interpret these laboratory test results than reference intervals in the AD diagnosis. ROC curve showed that the combination of miR-135a, -193b, and -384 was proved to be better than a particular one for early AD diagnosis.Conclusion Our results indicated that the exosomal miRs in the serum were not only potential biomarker of AD early diagnosis, but might also provide novel insights into the screen and prevention of the disease.展开更多
Objective In the present study,the ABCA1 was used as a label to capture specific exosomes,the level of ABCA1-labeled exosomal microRNA-135 a(miR-135 a)was evaluated for the diagnosis of Alzheimer’s disease(AD),especi...Objective In the present study,the ABCA1 was used as a label to capture specific exosomes,the level of ABCA1-labeled exosomal microRNA-135 a(miR-135 a)was evaluated for the diagnosis of Alzheimer’s disease(AD),especially in patients with early stages of AD.Methods This is a preliminary research focused on the levels of ABCA1 in WBCs,RBCs,HT-22 cells,and neuron cells.The diagnostic value of ABCA1-labeled exosomal miR-135 a was examined using the CSF and serum of APP/PS1 double transgenic mice,and 152 patients with SCD,131 patients with MCI,198 patients with DAT,and 30 control subjects.Results The level of ABCA1 exosomes harvested from HT-22 cells and neuron culture medium was significantly higher compared to that of RBCs and WBCs(P<0.05).The levels of ABCA1-labeled exosomal miR-135 a increased in the CSF of MCI and DAT group compared to those of control group(P<0.05),slightly increased(P>0.05)in the serum of SCD patient group,and significantly increased in MCI and DAT patient groups compared to those of the control group(P<0.05).Conclusion This study outlines a method to capture specific exosomes and detect them using immunological methods,which is more efficient for early diagnosis of AD.展开更多
Objective This study aimed to evaluate the genetic diversity,virulence,and antimicrobial resistance of Aeromonas isolates from clinical patients,tap water systems,and food.Methods Ninety Aeromonas isolates were obtain...Objective This study aimed to evaluate the genetic diversity,virulence,and antimicrobial resistance of Aeromonas isolates from clinical patients,tap water systems,and food.Methods Ninety Aeromonas isolates were obtained from Ma’anshan,Anhui province,China,and subjected to multi-locus sequence typing(MLST)with six housekeeping genes.Their taxonomy was investigated using concatenated gyr B-cpn60 sequences,while their resistance to 12 antibiotics was evaluated.Ten putative virulence factors and several resistance genes were identified by PCR and sequencing.Results The 90 Aeromonas isolates were divided into 84 sequence types,80 of which were novel,indicating high genetic diversity.The Aeromonas isolates were classified into eight different species.PCR assays identified virulence genes in the isolates,with the enterotoxin and hemolysin genes act,aer A,alt,and ast found in 47(52.2%),13(14.4%),22(24.4%),and 12(13.3%)of the isolates,respectively.The majority of the isolates(≥90%)were susceptible to aztreonam,imipenem,cefepime,chloramphenicol,gentamicin,tetracycline,and ciprofloxacin.However,several resistance genes were detected in the isolates,as well as a new mcr-3 variant.Conclusions Sequence type,virulence properties,and antibiotic resistance vary in Aeromonas isolates from clinical patients,tap water systems,and food.展开更多
基金supported by the National Key Research and Development Program of China[2016YFC1306300]the National Natural Science Foundation of China[No.81401734]+1 种基金the National Research Foundation for the Doctoral Program of Higher Education of China[No.20121107110001]the National Natural Science Foundation of China[No.81472007]
文摘Objective MicroRNAs （miRs） are attractive molecules to be considered as one of the blood-based biomarkers for neurodegenerative disorders such as Alzheimer＇s disease （AD）. The goal of this study was to explore their potential value as biomarkers for the diagnosis of AD.Methods The expression levels of exosomal miR-135a, -193b, and -384 in the serum from mild cognitive impairment （MCI）, dementia of Alzheimer-type （DAT）, Parkinson＇s disease with dementia （PDD）, and vascular dementia （VaD） patients were measured with a real-time quantitative reverse transcriptase PCR （qRT-PCR） method.Results Both serum exosome miR-135a and miR-384 were up-regulated while miR-193b was down-regulated in serum of AD patients compared with that of normal controls. Exosome miR-384 was the best among the three miRs to discriminate AD, VaD, and PDD. Using the cut-off value could better interpret these laboratory test results than reference intervals in the AD diagnosis. ROC curve showed that the combination of miR-135a, -193b, and -384 was proved to be better than a particular one for early AD diagnosis.Conclusion Our results indicated that the exosomal miRs in the serum were not only potential biomarker of AD early diagnosis, but might also provide novel insights into the screen and prevention of the disease.
基金supported by the National Natural Science Foundation of China[No.81401734,81472007]the National Key Research and Development Program of China[No.2016YFC1306300]。
文摘Objective In the present study,the ABCA1 was used as a label to capture specific exosomes,the level of ABCA1-labeled exosomal microRNA-135 a(miR-135 a)was evaluated for the diagnosis of Alzheimer’s disease(AD),especially in patients with early stages of AD.Methods This is a preliminary research focused on the levels of ABCA1 in WBCs,RBCs,HT-22 cells,and neuron cells.The diagnostic value of ABCA1-labeled exosomal miR-135 a was examined using the CSF and serum of APP/PS1 double transgenic mice,and 152 patients with SCD,131 patients with MCI,198 patients with DAT,and 30 control subjects.Results The level of ABCA1 exosomes harvested from HT-22 cells and neuron culture medium was significantly higher compared to that of RBCs and WBCs(P<0.05).The levels of ABCA1-labeled exosomal miR-135 a increased in the CSF of MCI and DAT group compared to those of control group(P<0.05),slightly increased(P>0.05)in the serum of SCD patient group,and significantly increased in MCI and DAT patient groups compared to those of the control group(P<0.05).Conclusion This study outlines a method to capture specific exosomes and detect them using immunological methods,which is more efficient for early diagnosis of AD.
基金supported by the National Natural Science Foundation of China grant numbers NSFC 81861138053 and NSFC 31761133004。
文摘Objective This study aimed to evaluate the genetic diversity,virulence,and antimicrobial resistance of Aeromonas isolates from clinical patients,tap water systems,and food.Methods Ninety Aeromonas isolates were obtained from Ma’anshan,Anhui province,China,and subjected to multi-locus sequence typing(MLST)with six housekeeping genes.Their taxonomy was investigated using concatenated gyr B-cpn60 sequences,while their resistance to 12 antibiotics was evaluated.Ten putative virulence factors and several resistance genes were identified by PCR and sequencing.Results The 90 Aeromonas isolates were divided into 84 sequence types,80 of which were novel,indicating high genetic diversity.The Aeromonas isolates were classified into eight different species.PCR assays identified virulence genes in the isolates,with the enterotoxin and hemolysin genes act,aer A,alt,and ast found in 47(52.2%),13(14.4%),22(24.4%),and 12(13.3%)of the isolates,respectively.The majority of the isolates(≥90%)were susceptible to aztreonam,imipenem,cefepime,chloramphenicol,gentamicin,tetracycline,and ciprofloxacin.However,several resistance genes were detected in the isolates,as well as a new mcr-3 variant.Conclusions Sequence type,virulence properties,and antibiotic resistance vary in Aeromonas isolates from clinical patients,tap water systems,and food.
