1.Estimation of individual pharmacokinetic parameters using maximum a posteriori Bayesian method with D-optimal sampling strategy.
Junjie DING ; Zheng JIAO ; Yi WANG
Acta Pharmaceutica Sinica 2011;46(12):1493-500
This study was aimed to develop a maximum a posteriori Bayesian (MAPB) estimation method to estimate individual pharmacokinetic parameters based on D-optimal sampling strategy. Meanwhile, the performance of MAPB was compared with the multiple linear regression (MLR) method in terms of accuracy and precision. Pharmacokinetic study of pioglitazone was employed as the example case. The population pharmacokinetics was characterized by nonlinear mixed effects model (NONMEM). The sparse sampling strategy (1-4 points) was identified by D-optimal algorithm using WinPOPT software. The simulated data generated by Monte Carlo method were used to access the performance of MAPB and MLR. As the number of samples per subject decreased, the accuracy and precision of MAPB method tended to get worse. The estimation for CL and Vby MAPB using D-optimal two-point design had less bias with low inter-individual variability, and had more bias and imprecision with high residue variability. The estimation of AUC by MAPB using D-optimal 2 points design had similar accuracy and precision to MLR. However, MAPB estimation was better than MLR while adjusting the sampling time to one hour. Overall, the MAPB method had similar predictive performance as MLR, but MAPB could provide more pharmacokinetic information with higher sampling flexibility.
2.Study on Microsatellite DNA Loss of Heterozygosity in p16 Gene of Psoriatic Keratinocytes
Hongwen LI ; Lei YONG ; Ge GAO ; Yi DING ; Shiqi WANG
Chinese Journal of Dermatology 1995;0(03):-
Objectives To detect the loss of heterozygosity(LOH)frequencies of microsatellite loci D9S171and D9S1604in p16gene of psoriatic keratinocytes,and to study the correlation between mi-crosatellite LOH of p16gene and the development of psoriasis.Methods By the use of polymerase chain reaction(PCR)-denaturing polyacrylamide gel electrophoresis-silver staining,LOH was detected with23sam-ples of keratinocytes from psoriatic lesions and non-lesion skin.Results LOH was identified at loci D9S171and D9S1604in5and10out of23keratinocyte samples from LOH-exhibited psoriatic lesions,and in2and3of keratinocyte samples from psoriatic non-lesion skin,respectively.The frequency of LOH at D9S1604was significantly higher in psoriatic lesion samples than that in psoriatic non-lesion skin(P
3.Design of a Detection System of Leaky Surface Acoustic Wave Biosensor in Liquid Phase and Test of HPV
Yunxia WANG ; Weiling FU ; Ming CHEN ; Yi DING ; Liang CAO
Chinese Journal of Nosocomiology 2005;0(11):-
OBJECTIVE To design the detection system of the leaky surface acoustic wave(LSAW) biosensor in(liquid) phase and detect human papilloma virus(HPV) target sequence with the LSAW biosensor.METHODS A detection delay line and a reference delay line were constructed,the phase of the two delay line changes was(evaluated) in liquid phase,and real time monitoring of HPV reaction was performed by using the LSAW biosensor system.RESULTS The phase of the two delay lines had different changes in liquid phase;HPV could lead to a great change of the phase in the detection delay line,and reference delay line had no change.CONCLUSIONS The(detection) system of the LSAW biosensor in liquid phase is successfully constructed and real time monitoring of(detection) of HPV is realized.
4.Contents of 5-HMF during the Processing of Three Species of Polygonatum by HPLC and GC-MS
Liang CANG ; Zhenzhen CHEN ; Dong WANG ; Yi WU ; Yinping DING
China Pharmacist 2015;(3):387-390
Objective:To establish the determination methods for 5-HMF during the processing of polygonatums by HPLC and GC-MS. Methods:The contents of 5-HMF during the processing of three species of polygonatum were determined by HPLC and GC-MS, and the correlation curve of the processing time and the contents was established to study the change regularity of 5-HMF during the processing. Results:The contents of 5-HMF in the three species of polygonatum processed by steamed and stewed methods reached the peak value in 16h or so. The 5-HMF contents in the three species of polygonatum showed significant difference in the order of Polygo-natum cyrtonema Hua>Polygonatum kingianum Coll. et Hemsl. >Polygonatum. sibiricum Red. After the processing, the content of 5-HMF was increased, and the increase in stewed method was more notable than that in steamed method. Conclusion: The study pro-vides theoretical basis for the further study on the processing of polygonatum.
5.Expression of Id2 in Ewing sarcoma of bone and its significance
Yi DING ; Nana ZHANG ; Xiaoqi SUN ; Hua WANG
Chinese Journal of Clinical and Experimental Pathology 2015;(1):32-35
Purpose To study the expression of inhibitor of differentiation 2 (Id2) in Ewing sarcoma of bone as well as the correlation with cell cycle proteins. Methods The expression of Id2, c-Myc, Cyclin D1, p53, p16 and p27 in 45 cases of Ewing sarcoma were detected by immunohistochemical EnVision methods, the relationship between the expression of Id2 and clinicopathologic characteristics and the correlation with cell cycle proteins were analyzed. Results Total expression of Id2 was found in 88. 9% of Ewing sarcoma. Strong expression of Id2 was detected in 33. 3% cases. Higher frequencies of c-Myc and Cyclin D1 immunostaining were observed (66. 7% and 71. 1%, respectively), but lower frequencies of p53, p16 and p27 expression were present (20. 0%, 35. 6% and 28. 9%, respectively). Id2 overexpression displayed a negative relationship with p27 expression (P<0. 05). Among the follow-up of 24 cases, overexpression of Id2 was found more frequency in dead and metastases cases (41. 2%) when compared to that of progres-sion-free survival cases (14. 3%). Conclusions Id2 was extensively expressed in Ewing sarcoma of bone. Overexpression of Id2 and its correlation with p27 expression suggest that this is an important pathway involved in development of Ewing sarcoma. Moreover, Id2 overexpression may predict poor prognosis.
6.The changes and the clinical significance of plasma Apelin in elderly patients with sepsis
Yong WANG ; Yi ZHENG ; Yan FU ; Ning DING
Chinese Journal of Geriatrics 2013;32(8):861-863
Objective To investigate the clinical characteristic and the predicting value of plasma Apelin in elderly patients with sepsis.Methods A retrospective analysis was conducted in 26 sepsis patients aged (72.9±9.7) years in average and 30 healthy controls.Serum Apelin level was measured by ELISA.Body mass index (BMI) and C-reaction protein (CRP) were detected.Patients were divided into survival group (n=18) and death group (n 8).According to acute physiology and chronic health evaluation (APACHE) Ⅱ,patients were divided into subgroup A (n=14,APACHE Ⅱ score≤20) and subgroup B (n=12,APACHE Ⅱ score>20).Results The Apelin concentration was higher in sepsis patients than in healthy controls [(0.38±0.15)ng/L vs.(0.19±0.12)ng/L,t=2.011,P<0.05].The Apelin concentration was lower in survival group than in death group[(0.21 ± 0.29)ng/L vs.(0.49 ± 0.32) ng/L,t =2.094,P<0.05].The Apelin level was increased with APACHE Ⅱ scores increment in sepsis patients (P<0.05).Multivariable logistic analysis showed that when taking survival/death as the dependent variable and Apelin as the independent variable,the ()R value was 4.162 with 95% CI:1.115-15.535(P<0.05).Conclusions Increased serum Apelin level reflects the severity of illness in patients with sepsis,which is a risk factor for death in prognosis of sepsis.
7.Clinical significance of monocyte chemoattractant protein-1, tissue factor in elderly patients with acute exacerbation of chronic obstructive pulmonary disease
Yong WANG ; Ning DING ; Yanling ZHAI ; Fuqiang LIU ; Yi ZHENG
Chinese Journal of Postgraduates of Medicine 2013;(19):1-3
Objective To investigate the levels and clinical significance of monocyte chemoattractant protein (MCP)-1 and tissue factor (TF) in patients with acute exacerbation of chronic obstructive pulmonary disease(AECOPD).Methods Forty-nine elderly patients with AECOPD(AECOPD group) and 30 healthy controls (control group) were selected,and AECOPD group was divided into procalcitonin (PCT) increased group (PCT ≥ 0.5 μ g/L,19 cases) and PCT normal group (PCT < 0.5 μ g/L,30 cases) according to the level of serum PCT.The levels of plasma TF,serum MCP-1 and PCT were determined by enzyme linked immunosorbent assay.Results The levels of plasma TF and serum MCP-1 were (203.6 ± 92.9),(152.8 ±99.9) ng/L in AECOPD group,and (136.9 ±24.3),(87.5 ±41.5) ng/L in control group.There were significant differences in the levels of plasma TF and serum MCP-1 between AECOPD group and control group (P<0.01).The level of plasma TF was positively correlated with serum MCP-1 (r =0.673,P=0.029).The levels of plasma TF and serum MCP-1 were (215.3 ±71.2),(181.1 ±61.6) ng/L in PCT increased group,and (192.4 ±79.7),(137.3 ±74.4) ng/L in PCT normal group.There were significant differences in the levels of plasma TF and serum MCP-1 between PCT increased group and PCT normal group (P<0.05).Conclusions In patients with AECOPD,hypercoagulability state is activated,and it is more severe in the patients with increased PCT.The level of plasma TF is positively correlated with serum MCP-1 in patients with AECOPD.To monitor the levels of plasma TF and serum MCP-1 is particularly important for elderly patients of AECOPD with hypercoagulability state to prevent cardiovascular,lungs and cerebrovascular thrombotic disease.
8.An experimental study on sterilized barium sulfate (BaSO_4) for vertebroplasty
Long CHEN ; Caifang NI ; Yi DING ; Yijin WANG
Journal of Interventional Radiology 1994;0(03):-
0.05), while the strength and stiffness were significantly different (P
9.Analysis of Clinical Features of Alprostadil Lipid-micro Injection from 159 Hospitals of China
Hui WANG ; Zhengyue LIU ; Yi DING ; Zhangwei YANG
China Pharmacy 2017;28(14):1903-1907
OBJECTIVE:To provide evidence for rational use and clinical monitoring of Alprostadil lipid-micro injection (Li-po-PGE1). METHODS:Adult inpatients receiving Lipo-PGE1 from hospital information system(HIS)of 159 hospitals were select-ed as research subject. Based on frequency statistics,population,clinical diagnosis,and average daily dose of Lipo-PGE1 were all studied. RESULTS:A total of 71687 adult inpatients were included,and the male was more than female,mostly aged 61-75. The hospitalization duration was 8-14 d(45.01%),most of patients were recovered(68.20%). Lipo-PGE1 was wildly used in the clin-ic,and was used for 871 kinds of clinical diseases in total;top 3 diseases were cerebral infarction(9.06%),non-insulin dependent diabetes mellitus (8.65%) and chronic ischemic heart disease (8.08%). The average daily dose of different diseases and different hospitals were significantly different,mostly≤12.5μg. CONCLUSIONS:As adjuvant drug,medical institutions and related super-vision departments should formulate reasonable monitoring index and strengthen medication guidance and evaluation of Lipo-PGE1.
10.Effect of multi-disciplinary team on management of multidrug-resistant organisms
Hong WANG ; Meiling YI ; Weijian DING ; Jun PENG ; Qiuhong TAN
Chinese Journal of Infection Control 2015;(12):846-848
Objective To investigate the detection of multidrug-resistant organisms (MDROs)in a hospital, evaluate the efficacy of multi-disciplinary team(MDT)on management of MDROs,and provide guidance for effective control on MDRO infection.Methods From October 2013 to September 2014,compliance to comprehensive inter-vention measures in clinical departments in different stages as well as detection of MDROs from patients were com-pared respectively.Results Compliance to comprehensive intervention measures showed an overall upward trend from the fourth quarter of 2013 to the first,second,and third quarters of 2014,difference was statistically signifi-cant (all P <0.001 ).From the fourth quarter of 2013 to the third quarter of 2014,the percentage of the major MDRO strains in the same species of bacteria were:methicillin-resistant Staphylococcus aureus (MRSA)52.34%, 45.45%,48.95%,and 26.25% respectively;carbapenem-resistant Acinetobacter baumannii (CRAB)64.42%, 63.07%,59.87%,and 43.09% respectively;multidrug-resistant Pseudomonas aeruginosa (MDRPA)42.11 %, 41 .82%,29.33%,and 17.52% respectively;the detection rate of MRSA,CRAB,and MDRPA showed an overall downward trend,difference among different stages were statistically significant (all P <0.001 ).Detection rates of carbapenem-resistant Enterobacteriaceae (CRE)and vancomycin-resistant Enterococcus (VRE)were both low (<5%),difference among different stages were not statistically significant (all P >0.05).Conclusion MDT on man-agement of MDROs is helpful for reducing the emergence and spread of MDROs.