1.Impacts of the lump-sum prepayment practice of medical insurance and the countermeasures
Chenyang YAN ; Xingdong ZHENG ; Jianfei CAI ; Yiyong LIU ; Yonghai BAI
Chinese Journal of Hospital Administration 2011;27(3):161-163
The paper analyzed the impact of the trial for "lump-sum prepayment practice of medical insurance" on tertiary hospitals in Shanghai initiated by Shanghai Medical Insurance Bureau since 2009. Based on the analysis, the authors recommended that the hospitals should adapt to the changes by raising quality of care, improving cost accounting, informationizing and refining medical insurance information management, as well as controlling expenses on a rational basis. These approaches will help them adapt to and promote the ongoing health reform in China.
2.DNA methylation of glioma related gene and its significance
Xiaoguang YAN ; Dingchao HUA ; Geng GUO ; Chenyang LU
Journal of International Oncology 2015;(10):762-765
DNA methylation is closely related to the genesis and development of glioma.The CpG islands hypermethylation in promoter region of DNA repair genes,cell cycle controlling genes,apoptosis related genes,tumor suppressor genes and invasion related genes are found in glioma.Finding the specific methylation profile and molecular marker of glioma is helpful for the pathology class,early diagnosis and prognostic evalua-tion.Meanwhile,DNA methylation has the characteristic of reversibility,which may provide new ways for the treatment of glioma.
3.MicroRNAs and atherosclerosis
Dingchao HUA ; Xiaoguang YAN ; Geng GUO ; Chenyang LU
International Journal of Cerebrovascular Diseases 2015;(8):637-640
Atherosclerosis is the most important cause of ischemic stroke. microRNAs can play an important role in the lipid metabolism, vascular inflammatory response, angiogenesis, as wel as smooth muscle cel proliferation and phenotypic conversion, etc. by regulating the functions of vascular endothelial cel s, vascular smooth muscle cel s, and mononuclear macrophages. It is closely associated with the occurrence and development of atherosclerosis. This article mainly reviews the regulatory effect of microRNAs on lipid metabolism and vascular inflammatory response in pathogenesis of atherosclerosis.
4.Study on HPLC Characteristic Fingerprints of Lavandula Angustifolia
Chenyang LI ; Wei TAN ; Yan CHEN ; Jun ZHAO ; Fang XU
Chinese Journal of Information on Traditional Chinese Medicine 2015;(4):87-90,91
Objective To establish the fingerprints of 20 batches of Lavandula Angustifolia by HPLC. Methods The determination was performed on a Phenomenex ODS-A column (250 mm× 4.6 mm, 5 μm). The mobile phase was in gradient elute mode with a mixture consisting of acetonitrile and 0.036 mol/L phosphate acid solution. The flow rate was 1.0 mL/min. The temperature was 30 °C. The determine wavelength was 350 nm. The fingerprints of 20 batches of Lavandula Angustifolia were compared and classified by similarity evaluation, cluster analysis, and principal composition analysis. Results Totally 10 chromatographic peaks were extracted as the common peaks of Lavandula Angustifolia, and 2 peaks were identified. The similarity degrees of the 20 batches of Lavandula Angustifolia were above 0.9. All the batches of Lavandula Angustifolia were classified into 3 categories. Conclusion The method is simple and reproducible, and can be used for the standardization and quality control of Lavandula Angustifolia.
5.CT perfusion imaging on the disturbance of regional cerebral microcirculation in a pre-infarction period : an experimental study
Peiyi GAO ; Chenyang LIANG ; Yan LIN ; Fang YUAN ; Ling HU
Chinese Journal of Radiology 2001;0(08):-
Objective To investigate the CT perfusion imaging and the pathological features on the disturbance of regional cerebral microcirculation in a pre-infarction period, and to evaluate the relationship between the astrocytes and regional cerebral microcirculation. Methods Dynamic CT perfusion imaging of the models with regional cerebral hypoperfusion and astrocytic swelling in rats was performed to assess the presence or absence of the disturbance of regional cerebral microcirculation. Then, the histopathologic examination was made for both models, respectively. The ratios of side-to-side were measured at hypoperfusion areas in the models of regional cerebral ischemia. Results Regional hypoperfusion was revealed by regional cerebral blood flow (rCBF) and mean transit time (MTT) maps in the group of hypoperfusion for 6 hours. Regional cerebral blood volume (rCBV) and time-to-peak (TTP) maps were normal in that group. The ratios of rCBF, rCBV, MTT and TTP were 0 39-0 55, 0 92-1 00, 1 20-1 50 and 1 00-1 00 respectively. Astrocytic swelling pressing the capillary wall was obvious and subtle neuronal reversible degeneration was occasionally found. TTC stain was normal. In the tACPD group of astrocytic swelling, the abnormal hemodynamic regions on rCBF and MTT maps were found. The rCBV maps of 3 rats in the tACPD group showed the area of reduced rCBV. In 2 rats of tACPD group, the areas of delayed TTP were also found. The ratios of rCBF, rCBV, MTT and TTP were 0 25-0 44, 0 70-1 01, 1 20-2 00 and 1 02-1 45 respectively. TTC stain was negative. Electron microscope study revealed remarkable swelling of astrocytes, especially endfoot processes of astrocytes around capillaries. The abnormal hemodynamic region on rCBF and MTT maps matched with abnormal extent on histopathologic examination. The rCBV and TTP maps appeared normal. Conclusion The astrocytes can react in a way faster than the neurons in the pre-infarction period, viz. astrocytic swelling. The swelling of astrocytic foot, which pressed capillary vessel, induced the disturbance of regional cerebral microcirculation, and then aggravated hypoxic ischemic state in regional brain parenchyma. Perfusion CT and its parameters' analysis may play an increasing role to delineate the reversible hypoperfusion areas in pre-infarction period. Analyzing the relationship of rCBF and rCBV is very helpful to know the status of the capillary vessels in regional cerebral hypoperfusion area.
6.The value of 125iodine implantation combining transcatheter arterial chemoembolization to prevent digestive tract bleeding in patients with portal vein tumor thrombus in primary hepatocellular carcinoma
Li JIANG ; Dongming HAN ; Hongtao HU ; Junli MA ; Yan ZHAO ; Hailiang LI ; Chenyang GUO ; Quanjun YAO
Chinese Journal of Radiology 2016;50(10):784-788
Objective This study was to investigate the value of CT guided 125iodine implantation combining transcatheter arterial chemoembolization(TACE) to prevent digestive tract bleeding in patients with portal vein tumor thrombus in primary hepatocellular carcinoma. Methods Forty patients with portal vein tumor thrombus which were diagnosed to have primary hepatocellular carcinomas by diagnostic criteria of Chinese Anti-Cancer Association were collected prospectively. They were divided into the treatment group and the control group, with 20 patients in each group. The treatment group was treated by TACE for hepatic tumor and 125iodine seed implantation for portal vein tumor thrombus, while the control group was treated by TACE for hepatic tumor and only given β-blockers medicines after treatment. Intraoperative and postoperative surgery-related complications were observed. Three months after surgery, enhanced abdominal CT scanning was performed to evaluate treatment effects which were divided into complete response (CR), partial response (PR), and progressive disease (PD) and stable of disease (SD), and the local tumor control rates were calculated. The bleeding rates and mortality after 3 months, 6 months, 12 months were recorded. Treatment effects of the two groups were compared with continuously correction Chi-square test, bleeding rates were compared with Fisher test, and survival rates were analyzed with Kaplan-Meier survival curve and compared with Log-rank test. Results Overall the 40 patients were treated successfully without serious surgery-related complications. In the treatment group, there were 8 patients with PR, 6 with SD and 6 with PD, and the local control rates were 40% (8/20). In the control group, there were 1 patient with PR, 6 patients with SD and 13 with PD. The difference of the local control rates was statistically significant (χ2=5.161, P=0.023).The bleeding rates at 3, 6 and 12 months were 2, 2 and 3 cases in the treatment group, for control group they were 2, 6 and 10 cases respectively. There was no statistical difference between the 3 months and 6 months bleeding rates (P values were 1.000 and 0.235), but for 12 months bleeding rates, the difference was statistically significant (P=0.041).The 1 year cumulative survival rates of the treatment group and control group were 70% (14/20) and 40% (8/20), and the difference was statistically significant (χ2=4.675, P=0.031). Conclusion The treatment of 125iodine implantation combining transcatheter arterial chemoembolization in patients with portal vein tumor thrombus in primary hepatocellular carcinoma can reduce variceal bleeding rate and improve survival rate.
7.Construction and identification of recombinant adenovirus vectors carrying the human transcription factor PU.1 gene
Chenyang LIU ; Wenjie YAN ; Min WANG ; Wenkui SUN ; Xin SU ; Yi SHI
Journal of Medical Postgraduates 2016;29(5):465-469
Objective PU.1 plays a key role in innate immune function in the alveolar macrophage.This study was to con-struct and identify recombinant adenovirus vectors carrying the human transcription factor PU.1 gene. Methods The recombinant shut-tle plasmid was obtained from the PU.1 gene ( SPI1) and eukaryotic expression vector that digested by restriction enzymes and connected by T4 DNA ligase.The target fragment SPI1-IRES-EGFP was amplified by PCR.The product was cloned into the intermediate pDONR221 and then recombined with the adenovirus backbone plasmid pAd/CMV/V5-DEST to form a recombinant adenovirus vector. The recombinant adenovirus vector was linearized by PacI and then transfected into human embryonic kidney (HEK293) cells to obtain the recombinant adenovirus pAD-SPI1-IRES-EGFP, which was then propagated in HEK293 cells, filtered and purified to obtain high-con-centration adenoviruses.The adenovirus titer was determined by TCID 50 assay.The PU.1 gene expression in the HEK293 cells was con-firmed by fluorescence microscopy and real-time qPCR. Results PCR amplification, restriction digestion and sequencing analysis showed the recombinant adenovirus carried the correct PU.1 gene.The final virus titer, calculated by TCID 50, was 8 ×1011 IU/mL. Green fluorescence was observed under the fluorescence microscope. Real-time qPCR confirmed that the expression of PU.1 mRNA was increased by 2189.93 folds. Conclusion The recombinant adenovirus vector carrying the PU.1 gene was constructed and obtained successfully, which could contribute to further studies of the influence of PU.1 overex-pression on the innate defense against Aspergillus fumigatus.
8.Determination of Nigeglanoside in Seeds of Nigella glandulifera by HPLC
Yujiao ZHAN ; Chenyang LI ; Xu HU ; Yan CHEN ; Jun ZHAO ; Fang XU
Herald of Medicine 2018;37(11):1374-1376
Objective To establish a method for the determination of nigeglanoside in seeds of Nigella glandulifera. Methods The content of nigeglanoside was determined by HPLC.The separation was performed on a C18column ( YMC-Pack ODS-A,250 mm×4.6 mm,5 μm) with a gradient elution system of acetonitrile and 0.017 5 mol·L-1acetic acid solution at the flow rate of 1.0 mL·min-1.The detection wavelength was set at 290 nm,and column temperature was 30 ℃. Results The linear range of nigeglanoside was 0.01-0.30 mg·mL-1(R2=0.9991).The RSDs of precision,stability and repeatability were all less than 2%.The average recovery was 96.66% (RSD=1.25%,n=6). Conclusion The method is accurate and reproducible. It is effective in controlling the quality of seeds of Nigella glandulifera .
9.Construction and application of subject evaluation system in public hospitals
Jing XU ; Chenyang YAN ; Huizhi YANG ; Beibei HE ; Jiechun GAO
Chinese Journal of Hospital Administration 2022;38(12):915-919
Discipline evaluation is an important measure to promote the virtuous circle of discipline construction, and is an indispensable link in the process of discipline development in public hospitals. After becoming a directly affiliated hospital of a " double first-class" university, in order to improve the comprehensive strength and influence, a hospital built and applied a disciplinary evaluation system in four directions: talent construction, clinical medicine, scientific research ability, and teaching work. According to the evaluation results, the hospital′s disciplines were divided into three categories, namely, advantageous disciplines, cultivating disciplines and potential disciplines, and development strategies were established at different levels, providing policy support and financial support, especially in the field of scientific research and teaching, to accelerate to make up for shortcomings. Through exploration and practice, the talent team, scientific research and teaching level, discipline reputation, and comprehensive strength of the hospital had been significantly improved, providing effective support for the high-quality development of the hospital.
10.Log-linear model used in the hybrid design of case-parents triad/control-mother dyad
Weijun PENG ; Heng ZHANG ; Yingxue LI ; Chenyang LI ; Weirong YAN
Chinese Journal of Epidemiology 2016;37(6):886-890
This study introduced the application of a log-linear model in the hybrid design of case-parents triad/control-mother dyad.Data related to the association between cleft lip with palate (CLP) and methylenetetrahydrofolate reductase (MTHFR) gene A1298C diversity was analyzed.Log-linear model based on likelihood ratio tests (LRTs) was used to analyze the relationships between mother,offspring genotypes and CLP.Data from our study noticed that children of mothers carrying the CC genotype presented a lower risk of CLP,comparing with the children of mothers carrying the AA genotype,with S2=0.45 (95%CI:0.26-0.79).Offspring that carrying the AC genotype presented a lower risk of CLP,comparing with the offspring that carrying the AA genotype,with R1 =0.69 (95%CI:0.48-0.97).However,no other types of relationships were found.The power of hybrid design was greater than the case-parents study (0.86>0.78).MTHFR A1298C polymorphism seemed to have played an important role in the etiology on both cleft lip and palate.Data from the hybrid design and the log-linear model could help researchers to explore the effects of genotypes from both mothers and the offspring.This study design would present stronger power than the regular case-parents studies thus suitable for studies on the etiology of diseases in early lives,as birth defects.