1.A Cognition Survey of Basic Doctors on Essential Drugs in Lu-oping County, Yunnan Province
Zhou QIAN ; Bo LI ; Qi TANG ; Daying FENG ; Yajuan CHEN
Journal of Kunming Medical University 2013;(11):76-79
Objective To investigate the cognition of basic doctors on essential drugs in Luo County. Methods The random sampling was used to investigate the basic doctors in Luoping County, and 200 copies questionnaire were distributed. Results The questionnaire response rate was 98%. The survey results indicated that the cognition on essential drugs among basic doctors was poor, but most basic doctors have positive attitudes and behaviors in essential drugs. Conclusion It is necessary to improve the awareness of essential drugs among basic doctors in Luo County.
2.Hepatic failure patient's serum before and after plasmapheresis induces the differentiation of umbilical cord mesenchymal stem cells into hepatic cells
Jingbo WANG ; Daying GENG ; Xiaoying LI ; Li CHEN ; Feng XU ; Zhaozhang SHI
Chinese Journal of Tissue Engineering Research 2017;21(17):2659-2664
BACKGROUND: Umbilical cord mesenchymal stem cells (UC-MSCs) have made certain curative effect on hepatic failure, but little is reported on the effect of hepatic failure patient's serum microenvironment on UC-MSCs differentiation ability. OBJECTIVE: To investigate the effect of hepatic failure patient's serum on the differentiation of umbilical cord mesenchymal stem cells into hepatic cells. METHODS: UC-MSCs were isolated by tissue adherent method and the cell morphology and phenotype identified by microscope and flow cytometry. Alpha-MEM media with serum before/after plasmapheresis were used to culture the hirdgeneration of UC-MSCs, and regular fetal bovine serum culture medium acted as control group. Inverted microscope was used to observe the cell morphology in three groups. Immunohistochemical method was used to measure expression level of alpha fetoprotein, albumin and cytokeratin 18. RESULTS AND CONCLUSION: A great amount of high-purity UC-MSCs could be obtained using tissue adherent method, which highly expressed CD44, CD73, CD90, CD10, but did not express CD45. Hepatic failure patient's serum could change the morphology of UC-MSCs and induce UC-MSCs to express alpha fetoprotein, albumin and cytokeratin 18. The positive expression of alpha fetoprotein, albumin and cytokeratin 18 was significantly increased after plasmapheresis (P < 0.05). To conclude, hepatic failure patient's serum after plasmapheresis exert more benefits to induce UC-MSCs to differentiate into hepatic cells than that before plasmapheresis.
3.Comparison on real-time RT-PCR and ELISA methods in detection of severe fever with thrombocytopenia syndrome(SFTS) cases
Li WANG ; Jingwen LIU ; Zhaolei FENG ; Daying GENG ; Guangying YUAN
Chinese Journal of Experimental and Clinical Virology 2015;29(4):351-353
Objective To compare the difference of the positive rates between real-time RT-PCR and ELISA-IgM methods in diagnosis of severe fever with thrombocytopenia syndrome (SFTS) cases.Method 138 serum samples from 78 suspected acute SFTS patients were collected continuously in our hospital,2014.And 91 serum samples from 49 confirmed cases were detected by real-time RT-PCR and ELISA-IgM,simultaneously.The results were analyzed by Software SPSS17.0.Result 138 serum samples were detected by the real-time RT-PCR and ELISA-IgM methods,and the positive rate was 51.45%,43.48% respectively.There was significant difference between their positive rates (P < 0.05).The courses of disease influenced the positive rates notablely in 49 confirmed cases between the real-time RT-PCR and ELISA-IgM assays.When the serum samples were collected within 8 days onset of illness to be detected,the positive rate of real-time RT-PCR method was higher than that of ELISA-IgM method.While the positive rate of ELISA-IgM showed a rising tendency along with the course extension.Conclusion Real-time RT-PCR would be the first choice for the early diagnosis of suspected SFTS cases.While ELISA-IgM methods could be the necessary supplemental assay and it would be the important diagnostic method as the extension of the course of SFTS.
4.Evaluation of a new ultrafast real-time fluorescence polymerase chain reaction and common assays in the detection of novel Bunya virus
Jingwen LIU ; Ye SUN ; Li WANG ; Daying GENG ; Zhaolei FENG ; Guangying YUAN
Chinese Journal of Infectious Diseases 2020;38(2):99-104
Objective:To investigate the specificity and sensitivity of four methods including ultrafastreal-time fluorescence polymerase chain reaction (PCR), real-time fluorescence (RT)-PCR, enzyme-linked immunosorbent assay (ELISA) and gold immunochromatography assay (GICA) for the detection of novel Bunya virus, so as to provide experimental basis for the early diagnosis of severe fever with thrombocytopenia syndrome (SFTS).Methods:Serum samples from 86 clinically diagnosis SFTS patients admitted to the Jinan Infectious Diseases Hospital Affiliated to Shandoug University were tested by ultrafast real-time fluorescence PCR, RT-PCR, ELISA and GICA during June 1 to September 30, 2017. Chi-square test was used for statistical analysis.Results:Among 86 serum samples, the positive rate of novel Bunya virus of ultrafast real-time fluorescence PCR, RT-PCR, IgM-ELISA, IgG-ELISA, IgM-GICA and IgG-GICA were 82(95.34%), 79(91.86%), 41(47.67%), 8(9.3%), 19(22.09%) and 3(3.49%), respectively. The specificity of ultrafast real-time fluorescence PCR was 100%, and the sensitivity was 1×10 3 copies/mL.Repeated amplification test showed that the variation coefficient of the computed tomography value was <2%.During phases one, two and three, the positive rates of ultrafast real-time fluorescence PCR were 41(97.62%), 34(94.44%) and 7(87.50%), and RT-PCR were 39(92.86%), 33(91.67%) and 7(87.50%), respectively. During phases one and two, the positive rate of ultrafast real-time fluorescence PCR was slightly higher. The positive rate of anti-novel Bunya virus antibody (IgM) tested by ELISA had a significant increase from phase one (28.57%)to phase three (87.50%). There were statistical differences between phase two and phase, as well as between phase three and phase one ( χ2=8.347 and 7.561, respectively, both P<0.01). IgM-GICA also had an increase from phase one (14.29%) to phase two (33.33%)( χ2=3.962, P<0.01), while it was still lower than the other tests.In phase one, the positive rate of RT-PCR was higher than those of ELISA(both IgM and IgG)and GICA(both IgM and IgG)( χ2=33.740, 55.080, 49.010 and 64.340, respectively, all P<0.01). In phase two, the positive rate of RT-PCR was higher than those of ELISA(both IgM and IgG)and GICA(both IgM and IgG) ( χ2=7.700, 46.720, 23.700 and 50.630, respectively, all P<0.01). In phase three, the positive rates of ultrafast real-time fluorescence PCR, RT-PCR and IgM-ELISA were equivalent, which were all higher than those of IgG-ELISA and GICA (both IgM and IgG). The positive rates of RT-PCR and IgG-ELISA, IgM-GICA and IgG-GICA were significantly different (all χ2=6.250, all P<0.05). Conclusion:In the early detection of novel Bunya virus, ultrafast real-time fluorescence PCR has higher sensitivity, specificity, good repeatability and high stability, which greatly reduces the amplification time compared with the traditional RT-PCR, and is of great value in the early and rapid diagnosis of SFTS.