1.STUDDZS OF SCREENING MICROORGANISMS DEGRADING LINEAR SODIUM ALKYLBENZENESULFONATE (LAS) AND ITS DEGRADINGCHARACTERISTICS
Qi-Feng YING ; Chang-Song XIAO ; Shu-Lan JI ;
Microbiology 1992;0(01):-
A bacterium which can effectively degrade LAS (Linear Sodium Alkylbenzenesulfonate) was isolated from washing powder manufacturing effluent and was preliminarily identified as Corynebacterium jeikeium GZ6. The bacterium can degrade LAS up to till 700 mg/L, and the optimum pH, temperature and concentration of LAS are 7.0, 30℃ and 400 mg/L, respectively. The biodegradation rate can reach 98.7% after 24 hours'cultivation in the suitable conditions. Experiments also showed that some heavy metal ions such as Hg2+ , Co2+ , Cd2+ can differently inhibit the degradation of LAS.
2.Comparison of clinical efficacy of intra-articular ropivacaine mixed with dexmedetomidine or morphine for postoperative analgesia after arthroscopic knee surgery
Qingren LIU ; Ying XIAO ; Xuewei ZHANG ; Yunhui ZHANG ; Yong JI
Clinical Medicine of China 2016;32(8):694-697
Objective To compare the efficacy of intra?articular dexmedetomidine or morphine mixed with ropivacaine for postoperative analgesia after arthroscopic knee surgery?Methods Sixty ASA physical status I or II patients scheduled for elective arthroscopic knee surgery were randomly assigned into 3 equal groups using a random number table?The group R received 0?25% ropivacaine, and the group RD received 1 μg/kg dexmedetomidine and 0?25% ropivacaine,and the group RM received 2 mg morphine and 0?25% ropivacaine intraarticularly in a total volume of 20 ml?Visual analogue scales( VAS) scores when the patients actively flexed the operated knee to 90° were recorded at 2, 4, 8, 12, 18 and 24 h after surgery?The analgesic duration and consumption of fentanyl at 24 h after surgery were recorded?The complications such as bradycardia,hypotension, nausea,vomit,cutaneous pruritus and uroschesis were followed up?Results At 8 and 12 h after surgery,VAS scores were significantly lower in group RD ( ( 3?23 ± 0?45 ) points, ( 3?18 ± 0?47 ) points ) and RM ( ( 3?20 ±0?46) points,(3?13±0?45) points) than in group R((4?01±0?74) points,(3?93±0?71) points),and at 18 and 24 h after surgery,they were significantly higher in group R((3?85±0?62) points,(3?72±0?57) points) and RD((3?83±0?57) points,(3?71±0?55) points) than in group RM((3?07±0?43) points,(3?02±0?41) points),and there was significant difference(F between groups=124?65,P=0?021,F inner grouP=11?65,P=0?004,F across groups=67?65,P=0?024)?The analgesic duration was significantly different in three groups (F=45?78,P<0?001),and in group RD((668?3±133?4) min) and RM((1 412?8±275?67) min) was significantly longer than in group R(402?3±81?5) min,P<0?05),and the group RM was longer than the group RD( P<0?05)?The consumption of fentanyl at 24 h after surgery was significantly different in three groups ( F=34?47,P<0?001),and it was significantly lower in group RD((32?6±7?3) μg) and RM((12?8±3?7) μg) than in group R((151?3±28?5) μg,P<0?05),and the group RM was lower than the group RD(P<0?05)?No significant side effects were found?Conclusion Intra?articular dexmedetomidine or morphine all can improve the efficacy of ropivacaine for postoperative analgesia after arthroscopic knee surgery,while morphine is superior to dexmedetomidine.
3.Quality control of Maca (Lepidium meyenii).
Ji-cheng SHU ; Hang-qing CUI ; Ying-zheng HUANG ; Xiao-ying HUANG ; Ming YANG
China Journal of Chinese Materia Medica 2015;40(23):4536-4540
To control the quality of Maca, the quality standard was established in this study. According to the methods recorded in the Appendix of Chinese Pharmacopoeia (2010 Edition), the water, extract, total ash, acid insoluble substance, and heavy metals inspections in Lepidium meyenii were carried out. N-benzyl-9Z, 12Z-octadecadienamide in L. meyenii was identified by TLC, and it was determined by HPLC. The results showed that the N-benzyl-9Z, 12Z-octadecadienamide identification of TLC was a strong mark and specificity. In content determination experiment, the linearity of N-benzyl-9Z, 12Z-octadecadienamide was in the range of 0.01-2 microg (r = 0.9998), and the average recovery (n=9) was 99.27% (RSD 2.0%). The methods were simple, accurate, with good reproducibility. It is suitable for quality control L. meyenii.
Chromatography, High Pressure Liquid
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methods
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Chromatography, Thin Layer
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methods
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Lepidium
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chemistry
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Plant Extracts
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chemistry
4.Study on the use of model life tables methodology in birth defect's life expectancy estimation:the case of Down's syndrome
Ying JI ; Gong CHEN ; Xiao-Ying ZHENG
Chinese Journal of Epidemiology 2008;29(4):396-400
Using Brass-Logit model and life tables for general population and Down's syndrome patients in U.S.A and lire tables for general population in China,we estimated the life table of Down's syndrome patients in China.Through comparing with data from other countries,we suggested that BrassLogit Model Life Table could be adopted were minimum data of birth defects survival was available and systematic data was handy in another areas.
5.Comparison of 99Tcm-DMSA renal cortical scintigraphy and ultrasonography in diagnosing acute pyelonephritis in children
Yi-wei, LI ; Qiang-ying, QIAN ; Rui-fang, ZHAO ; Zhi-ying, JI ; Xiao-mei, L(U) ; Ha, WU ; Xian-ying, CHENG ; Fan-lei, GU ; Xiao-fei, ZHAO
Chinese Journal of Nuclear Medicine 2010;30(5):336-338
Objective To compare the diagnostic value of renal ultrasound scan (RUS) and 99Tcmdimercaptosuccinic acid (DMSA) renal scintigraphy in children with acute pyelonephritis (APN). Methods In all, 165 children with initial clinical diagnosis of APN, aged from 1.5 months to 11 yrs ( median 20 months), were included in the study, all of which were examined with RUS and DMSA renal scientigraphy. The diagnosis with DMSA renal scientigraphy results was taken as the standard reference to evaluate the diagnostic sensitivity and specificity of RUS. Results Of 99 out of all 330 kidneys that were found abnormal on DMSA renal scientigraphy, 31 were abnormal on RUS. Of the rest normal kidneys on DMSA scans renal scientigraphy, 4 were abnormal on RUS. Thus diagnostic sensitivity of RUS for APN was 31.3%(31/99) and specificity was 98.3% (227/231). Conclusions Although RUS provides with high diagnostic specificity for children with APN, its low sensitivity may underestimate the clinical evaluation of APN.More often than not, 99Tcm-DMSA renal scientigraphy is a clinical necesscity for the definite RUS diagnosis.
6.Investigation of plasmacytoid dendritic cell reconstitution and its relationship with cGVHD and relapse after haploidentical hematopoietic stem cell transplantation.
Journal of Experimental Hematology 2007;15(2):342-347
To investigate the characteristics and significance of reconstitution of peripheral blood plasmacytoid dendritic cell (PDC) precursors after allogeneic human leukocyte antigen mismatched/haploidentical hematopoietic stem cell transplantation, and its relationship with chronic graft versus host disease (cGVHD) and relapse, 19 patients with leukemia were enrolled for this study. Peripheral blood dendritic cell (DC) subsets of patients and healthy controls were detected by flow cytometry, and the correlations between reconstitution of DC and cGVHD, relapse were analyzed. The results showed that compared with healthy subjects, patients with leukemia had a significantly decreased proportion and absolute number of myeloid dendritic cell (MDC), MDC1, DC and the ratio of MDC/PDC (P<0.05). There were not statistically different in MDC2 and PDC between patients and healthy subjects. After transplant, all the proportion of WBC and absolute numbers of DC reached to healthy controls levels at 9 months (P>0.05), besides the proportion of PDC which reached to healthy controls levels at 1 year (P=0.494). Compared with levels before relapse, the proportions of MDC1, MDC, DC and the ratio of MDC/PDC were lower, but proportions of MDC2 and PDC were slightly higher after relapse. Patients with a 'high' PDC recovery profile had an improved cumulative incidence of cGVHD in contrast to patients with a 'low' PDC recovery profile on day 120 after transplantation (P=0.007). It is concluded that compared with healthy subjects, de novo leukemia patients have a significantly decreased proportion and absolute number of DC and the ratio of MDC/PDC before haploidentical hematopoietic stem cell transplantation; while ratio of MDC/PDC can be normalized with relative rapidity, the proportions of all DC subsets reached to normal levels on the whole at 9 months after transplantation, and also recovery level of DCs is correlated with occurrence of cGVHD and relapse.
Adolescent
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Adult
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Burkitt Lymphoma
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therapy
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Child
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Dendritic Cells
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cytology
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immunology
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Female
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Graft vs Host Disease
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prevention & control
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Graft vs Leukemia Effect
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HLA Antigens
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immunology
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Haplotypes
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immunology
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Histocompatibility
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Histocompatibility Testing
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Humans
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Leukemia, Myelogenous, Chronic, BCR-ABL Positive
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therapy
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Male
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Middle Aged
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Myeloid Cells
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cytology
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immunology
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Peripheral Blood Stem Cell Transplantation
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adverse effects
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methods
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Plasma Cells
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cytology
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immunology
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Recurrence
7.A simulation on the emerging of birth defects in China with Kriging interpolation method.
Chinese Journal of Epidemiology 2007;28(2):184-188
OBJECTIVETo describe the regional patterns of emerging level on birth defects with simulated map by original studied and reference data.
METHODSBased on geographical information system, Kriging interpolation method was used and some related environmental factors were drawn from geographic information system software.
RESULTSThe Kriging method had drawn continual and smooth map on birth defect emerging level and shown some clues with environmental factors.
CONCLUSIONKriging method and advanced spatial statistical and analytical methods were helpful in public health studies while simulated map suggested the feasibility of sampled data on national disease surveillance and giving some useful clues to etiological analysis.
China ; epidemiology ; Congenital Abnormalities ; epidemiology ; Forecasting ; Geographic Information Systems ; Humans
8.Inhibition of proliferation of retinal microvascular endothelial cells by pericytes through down-regulating KDR/Flk-1 in a co-culture system
Ying-Li, WANG ; Yan-Nian, HUI ; Bin, GUO ; Xiao-Guang, ZHANG ; Xu, HOU ; Ji-Xian, MA
International Eye Science 2006;6(2):255-263
· AIM :To investigate the role of pericytes in growth of retinal microvascular endothelial cells with a co-culture system in order to understand some mechanism of angiogenesis in hypoxia induced retinal neovascular disorders.(RMECs) were isolated by a modified protocol using CD31 coated Dynabeads, and identified by immunocytochemical staining with anti-Factor Ⅷ and CD31 antibodies. Rat retinal pericytes were isolated and characterized by immunofluorescent staining with PDGFR-β; and desmin antibodies. Pericytes and RMECs were cultured in a contact co-culture system both under normoxia and hypoxia by Millicell chamber. RMECs proliferation was evaluated by MTT and cell cycle assay with flow cytometry. RT-PCR was used to detect the alteration of KDR/Flk-1 mRNA level in RMECs under normoxia or hypoxia in the co-culture system.harvested with the modified isolating method. The two cell types were identified by positive Factor Ⅷ, CD31 and PDGFR-β, desmin cytochemical staining respectively.RMECs proliferated significantly under hypoxia from 3 to 9d with a maximal rate on day 6 (24.9%, P < 0.01) by MTT. In the co-culture system, the proliferation of RMECs was inhibited by pericytes. After 6d exposure to hypoxia,the fraction of S-phase RMECs number was greatly increased by 43.9% (P < 0.01). In the co-culture system,RMECs proliferation was inhibited by pericytes through decreasing the fraction of S-phase cell number both under normoxia (3.6%, P<0.05) and under hypoxia (15.1%,P<0.01). KDR/Flk-1 mRNA level in single cultured RMECs was shown to increase approximately 1.3-fold when exposed to hypoxia. Compared with single cultured RMECs, co-culture with pericytes could decrease KDR/Flk-1 mRNA by 45.1% (P<0.05) and 27.7% (P < 0.05) under normoxia and hypoxia condition respectively.pericytes could inhibit proliferation of RMECs under both normoxia and hypoxia. The inhibition effects of pericytes maybe, at least in part, due to downregulation of KDR/Flk-1 of RMECs. These findings confirm that pericytes could be a potential inhibitor in the pathogenesis of retinal neovascularization.
9.Alpha-fetoprotein and des-gamma-carboxyprothrombin in the differential diagnosis of hepatocellular carcinoma from other liver tumors
Wenbin JI ; Nianjun XIAO ; Ying LUO ; Zhe LIU ; Ning ZHANG ; Zhe KONG ; Shichun LU
Chinese Journal of Hepatobiliary Surgery 2016;22(3):145-149
Objective To compare the clinical utility of alpha-fetoprotein (AFP) and des-gammacarboxyprothrombin (DCP) in diagnosing hepatocellular carcinoma (HCC) in patients with a hepatic mass.Methods From January 2015 to May 2015,141 patients were diagnosed to have a liver tumor after imaging examinations in the Hepatobiliary Surgical General Hospital of PLA,Beijing,China.Preoperative AFP and DCP were measured using commercial assay kits.The reference standard was either pathologic or clinical diagnosis of HCC.The performance of AFP and DCP in diagnosing HCC was determined using receiver operating characteristic curve analysis.Results Of 141 patients,98 were diagnosed to have HCC and 43 without.The levels of AFP were significantly higher in patients with HCC than those without [80.0(3.9-1 375.0) μg/L vs.2.1 (1.6-3.2) μg/L,Z =6.98,P < 0.01].Similar results were observed in the levels of DCP [141.5 (24.0-978.0) AU/L vs.19.0 (14.0-25.5) AU/L,Z =5.18,P < 0.01].Receiver operating curves (ROC) indicated the cut-off value with the best sensitivity and specificity was 3.6 μg/L for AFP and 35 AU/L for DCP.The difference in the area under ROC between AFP and DCP was not statistically significant (0.87 vs.0.78,Z =1.72,P =0.085).The sensitivity and specificity for detection of HCC in patients with a hepatic mass were 56.1% and 95.4% for AFP > or =20 μg/L,69.4% and 83.7% for DCP > or =40 AU/L,respectively.The level of AFP was associated with DCP in patients with HCC (x2 =9.12,P < 0.01,r =0.292) and parallel testing of AFP and DCP gave an optimal sensitivity of 79.6% with a specificity of 81.4% in diagnosing HCC.Conclusions DCP is a useful biomarker and it gave an equal performance as AFP in diagnosing HCC in patients with a liver mass in this study.Parallel testing of AFP and DCP effectively increased the diagnostic sensitivity.Although the biomarkers only marginally improved the diagnostic results,it could be useful in diagnosing HCC in individuals who had atypical imaging results.
10.Effects of Vitaimin D on Insulin Sensitivity and the Adipokine Factors APN,Visfatin, RBP4,TNF-αin Patients with Gestational Dellitus Mellitus
Liming ZHANG ; Ling GAO ; Hongxia SHUAI ; Ying YANG ; Chenxin DENG ; Yuan TIAN ; Ji MA ; Jing XIAO
Herald of Medicine 2014;(5):593-596,597
Objective To investigate the relationship and mechanism of the serum vitamin D levels with insulin sensitivity and adipokines APN,RBP4,visfatin and TNF-α in patients with gestational diabetes mellitus(GDM). Methods A total of 101 patients with gestational diabetes( GDM group) and 50 pregnant women with normal blood sugar( control group) were recruited to detect the serum levels of correlative biochemical indexes,APN,RBP4,visfatin,TNF-α and 25OHD3 using an HPLC method. Twenty-four patients in the GDM group diagnosed with vitamin D deficiency(<25 nmol·L-1 ) were randomized to receive either 1,25(OH) 2D3(0. 25 μg·d-1) orally or no treatment. Serum levels of correlative biochemical indexes were detected after 1 month. Results GDM patients had 25OHD3 levels significantly lower than the control group(P<0. 05),APN levels lower than the control group,and RBP4,visfatin,TNF-α levels significantly higher than the control group(all P<0. 05). After 1 month of 1,25(OH) 2D3 treatment,HOMA-IR increased,while HOMA-β decreased. APN levels was positively correlated(r= 0. 526) with 25OHD3;RBP4,visfatin,TNF-α decreased and were negatively correlated with 25OHD3( r values were -0. 272,-0. 153,-0. 072). Conclusion Vitamin D can reduce the adipokines RBP4,visfatin,TNF-α,increase APN,and thus play a protective role for gestational diabetes.