3.Polymorphism of Escherichia coli Isolated from the Fecal
Mei-Ling ZHANG ; Zhi-Hua ZHOU ; Li-Ping ZHAO ;
Microbiology 1992;0(02):-
In this study, three methods for identification of E.coli were compared. The conventional method was employed to select and identify the suspicious E.coli isolates from a fecal sample. PCR based ARDRA analysis was then carried out to distinguish these E.coli isolates, E.coli MG1655 and other bacterial species. All the potential E.coli isolates and E.coli MG1655 had the identical ARDRA banding pattern while the other bacterial species showed the different patterns.The result indicated that the ARDRA analysis was consistent with the traditional method for identification of E.coli and could be the practical method for distinguishing E.coli from other intestinal bacterial species. The ERIC-PCR analysis provided abundant polymorphism between different E.coli isolates, and might be a powerful approach for elucidating the genetic diversity among isolates of the same species.
4.The Optimal Condition of Producing Celluase by Trichoderma aureoviride
Zhi-Wei LIN ; Dong-Mei SUN ; Hong-Mei ZHANG ; Jin-Ling ZHAO ;
Microbiology 1992;0(01):-
Producing cellulase conditions such as different temperature,inoculum size,liquid level and pH level by Trichoderma aureoviride in the shaking bottle were studied by orthogonal design method. The results showed that the main factor affecting the producing cellulase was temperature among the orthogonal conditions.The optimum conditions were as follows:cultivating solution initial pH was 6, cultivating temperature was 28℃,inoculation size was 8%,liquid level was 40 mL in 150 mL triangle bottle,rotation speed was 170 r/min.
5.Effect of bushen tiaojing recipe on the quality of the oocytes and reproductive hormones in the follicular fluid in IVF-ET patients.
Ying LIANG ; Hui-Lan DU ; Xiu-Feng CHANG ; Sheng-Nan ZHAO ; Ling-Mei LEI
Chinese Journal of Integrated Traditional and Western Medicine 2014;34(8):911-916
OBJECTIVETo explore the effect of Bushen Tiaojing Recipe (BTR) on the quality of oocytes, reproductive hormones, and the expression of bone morphogenetic protein-15 (BMP15) of in vitro fertilization-embryo transfer (IVF-ET) patients.
METHODSSixty infertility patients who prepared for IVF-ET were assigned to two groups according to the treatment order, the treatment group [20 cases, treated with BTR + controlled ovarian hyperstimulation (COH)] and the control group (treated with COH alone, 40 cases). Age, the time limit for infertility, basal follicle-stimulating hormone (bFSH) concentration, usage days and the dosage of gonadotropins (Gn), serum levels of estradiol (E2), luteotropic hormone (LH), and progesterone (P) on the HCG injection day, the number of retrieved occytes, the fertilization rate, the number of embryos, the high quality embryo rate, and the clinical pregnancy rate were compared. Concentrations of follicle-stimulating hormone (FSH), LH, E2, testosterone (T), and P in the follicular fluid were detected via chemiluminescence microparticle immunoassay. The mRNA and protein expression of BMP-15 in mature granulosa cells was detected by real-time fluorescent PCR and Western blot.
RESULTSThirty-two patients were pregnant and the total pregnancy rate was 53.3%. Of them, 19 were pregnant and the total pregnancy rate was 47.5% in the control group, while 20 were pregnant and the total pregnancy rate was 65.0% in the treatment group. But there was no statistical difference between the two groups (P > 0.05). Compared with the control group, the Gn dosage was lower and the high quality embryo rate was higher in the treatment group, showing statistical difference (P < 0.05). There was no statistical difference in serum concentrations of E2, LH, or P on the HCG injection day, the number of retrieved oocytes, or the fertilization rate (P > 0.05). Compared with the control group, FSH concentrations in the follicular fluid were significantly lower and LH concentrations were significantly higher in the treatment group (P < 0.05). The LH concentrations in the follicular fluid were significantly higher in pregnant patients than non-pregnant patients, showing statistical difference (P < 0.05).There was no statistical difference in E2, T, or P concentrations (P > 0.05). The mRNA and protein expression of BMP-15 in granulosa cells was higher in the treatment group than in the control group (P < 0.05). It was also higher in pregnant patients than non-pregnant patients, showing statistical difference (P < 0.05).
CONCLUSIONDuring the IVF-ET process, BTR could elevate the quality of oocytes, and increase the sensitivity of ovarian follicles to exogenous Gn, which was correlated with the mRNA and protein expression of BMP-15 in granulosa cells, and changing concentrations of FSH and LH.
Adult ; Bone Morphogenetic Protein 15 ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; Embryo Transfer ; Estradiol ; blood ; metabolism ; Female ; Fertilization in Vitro ; Follicle Stimulating Hormone ; metabolism ; Follicular Fluid ; metabolism ; Humans ; Luteinizing Hormone ; blood ; metabolism ; Oocytes ; drug effects ; Pregnancy ; Progesterone ; blood ; metabolism ; Testosterone ; metabolism ; Young Adult
7.A current investigation on blood- lipid level of Xinjiang pasturing area minority
Ling ZHOU ; Nanfang LI ; Xiaojuan YIN ; Yan SHI ; Mei CAO ; Yongmei ZHAO
Chinese Journal of Tissue Engineering Research 2003;7(9):1406-1407
Aim To study the prevalence of blood- lipid level and abnormal lipdemia in Xinjiang pasturing area minority,and select high risk population.Methods A current investigation of 1 084 Mongol and Kazakan people with the methods of random sample, meanwhile, according to criterion to collect vein blood to measure blood TC,TG,LDL- C , to calculate HDL- C with numeration.Statistical analysis with SPSS software package. To take corresponding statistical methods according to characteristics of the documents.Results (1) Hyper LDL- C,low HDL- C are the key types in this pasturing area, the former prevalence was 51.0% and 32.1% among the male and female; and the later was 50.2% and 29.8% (χ 2=39.50,45.60,P< 0.01), both near average standard in our country.(2)Abnormal lipdemia was related to age and sex,that was more higher in the male group than that in female group, and increased with the age, but the female group was more higher than male group over 60 years old.(3)The general standard tendency of HDL- C in female group was higher than that in male group, but with no statistics difference.(4)Compared with other areas,TC,LDL- C standard on the higher level,but TG,HDL- C on the lower.(5)Compared with the blood- lipid level of the same minority ten years before,TC,TG,LDL- C showed an increasing trend,however,HDL- C which had protection to human body showed a decreasing trend.Conclusion The Mongol and Kazakan people in Xinjiang pasturing areas are the hyper prevalence of the abnormal blood- lipid level.The etiology may be connected with the heredity susceptibility, on the other hand,the dietetic structure and habits can not be ignored.
8.Studies of Temperature Shift Fermentation for Eicosapentaenoic Acid Production by Nitzschia laevis
Xiao-Hong CAO ; Yu-Hua ZHAO ; Mei-Fang LU ; Jing LEI ; Chun-Ling WANG ;
China Biotechnology 2006;0(12):-
Fermentation for Eicosapentaenoic Acid(EPA) production by Nitzschia laevis at various temperature between 10℃ and 30℃ was investigated and the dynamics characteristics during fermentation process were also analyzed.Based on the results,a varying temperature nursing method of two stage control strategy is proposed:During the first stage,which comprises the delay phase and the initial index phase,the temperature is maintained at 25℃;then the temperature is shifted to 20℃ and kept up till the end of the fermentation process.By this method,a EPA content of 6.0% and a yield of 291.60 mg/L have been gained.These are 24.07% and 18.81% higher than that of fixed temperature(25℃) fermentation,respectively.
9.Association of Serum Adiponectin and Metabolic Syndrome in Children with Obesity and Nonalcoholic Fatty Liver Disease
xiao-yuan, ZHAO ; xiu-yuan, DING ; ling-hui, MENG ; mei-xian, ZHANG ; jie, MI
Journal of Applied Clinical Pediatrics 2004;0(07):-
Objective To investigate the relationship between serum adiponectin and metabolic syndrome(MS) in children and adolescents with obesity and nonalcoholic fatty liver disease(NAFLD).Methods Four elementary schools and 4 middle schools were selected from Haidian district in Beijing with representative cluster sampling.Two hundred and eighty obese children(obese group),65 obese children with NAFLD(NAFLD group) and 264 normal weight children(healthy control group) aged 7 to 18 years were recruited from the 8 schools with uncompletely randomized sampling.Data including questionnaire,anthropometric measurements,B type ultrasonographic examination for liver were collected and fasting blood laboratory assay were determined.Variables including triglyceride(TG),adiponectin,alanine aminotransferase(ALT) and aspartate aminotransferase(AST) were skewed distribution and natural logarithmical transformations were performed.Chi-square test for category and multiple binary Logistic regression analysis were used to statistical analysis.Results Body mass index(BMI) and waist circumference(WC) in obese group and NAFLD group were higher than those in healthy control group.All the chi-square tests for trend among the 3 groups were statistically significant(P
10.Pathogen distribution and susceptibility profile of fungal isolates from bloodstream infections during the period from 2013 through 2015
Ling WEI ; Wenying XIA ; Jue WANG ; Yi WEN ; Genyan LIU ; Wangsheng ZHAO ; Yaning MEI
Chinese Journal of Infection and Chemotherapy 2017;17(3):256-259
Objective To investigate the pathogen distribution and susceptibility profile of fungal isolates from bloodstream infections,and valuate the clinical utility of G test in diagnosis of fungal infections for the purpose to improve antifungal therapy.Methods A retrospective analysis was carried out to analyze the fungal pathogens isolated from bloodstream infections in the First Affiliated Hospital of Nanjing Medical University during the period from January 2013 through December 2015 and their antimicrobial susceptibility.Results A total of 114 fungal strains were isolated from bloodstream infections during the 3-year period,most of which were Candida (99/114,86.8%),especially Candida albicans (30.7%).About 41.2% (47/114) of the fungal strains were isolated from Department of Thoracic Surgery (10,5 and 4 strains in 2013,2014 and 2015),Hematology (11 strains in 2014),and ICU (7 strains in 2014).Antimicrobial susceptibility testing showed that all the fungal strains (100%) were susceptible to amphotericin B,but 83.5% susceptible to itraconazole (the lowest).G test was positive before the result of blood culture in 13 of the 54 patients who received G test.Conclusions Candida was the most common fungus in fungal bloodstream infection.Amphotericin B is the most active antifungal agent in vitro.Blood culture combined with serological test can provide clinicians an earlier and reliable diagnosis.