1.In vitro experimental study on removing low density lipoprotein with HB-H-8 resin adsorption
Yichen LI ; Liqun LUO ; Tao LI
International Journal of Biomedical Engineering 2012;35(2):121-124
ObjectiveCurrently,adsorption materials applied to remove low density lipoprotein (LDL) still remain defects.HB-H-8 resin has not been put in use in removing LDL.This study focused on primary evaluation of adsorption capability of HB-H-8 resin.MethodsHB-H-8 resin was used in the adsorption of LDL of patient that was higher than the normal range of blood sample in dynamic test and static test in vitro.ResultsThe time of adsorption saturation was two hours,and the optimum temperature was 37℃.The results of adsorption in vitro showed that the average adsorption rates of LDL and high density lipoprotein (HDL) were 63.2% and 1.9%,respectively.ConclusionHB-H-8 resin has LDL higher adsorption capability,thus made it to be a potential blood purification material for the removal of LDL.
2.A review of the therapy of aged lung cancer
Yichen XU ; Shijie ZHU ; Peiwen LI
Cancer Research and Clinic 2009;21(1):1-3
The article briefly reviews the aged lung cancer in epidemiology, physical and pathologic traits, and treatments. It includes the matters needing attention of operation with elder lung cancer patients; matters about the radiotherapy; choice of chemotherapeutics or dosage; situation of targeted drug and treatment of Chinese Medicine. Goals of treatment with elder lung cancer patients are prolonging lifetime, improving quality of life. Patients should be treated individually according to their state of illness and constitutions.
3.A Sutdy on the Relationship among the Severity of Coronary Disease,CRP and Mild Renal Dysfunction
Li SHEN ; Yichen WANG ; Jun YIN
Journal of Chinese Physician 2001;0(09):-
Objective To explore the relationship among the severity of coronary disease, c-reaction protein (CRP) and mild renal dysfunction. Methods 64 patients underwent coronary angiography were divided into two groups according to their serum creatinine (cr) levels: normal renal function(cr
4.Deep neck abscesses accompanied by multiple underlying diseases: 2 case reports.
Yichen WAN ; Yan YAN ; Li WANG
Journal of Clinical Otorhinolaryngology Head and Neck Surgery 2012;26(19):906-907
Patients who complained of pain, tenderness mass in neck, fever, limitation of mouth opening, pharyngalgia,dysphagia,with lab showing increased Neu, remarkably decreased PLT, upsurging Glu, urine-Glu, ALT, T-Bil, AFP, were finally diagnosed to suffer from deep neck abscesses after CT scanning. What was worth mentioning was that diabetes, hepatitis C, thrombocytopenia, and fungus infection added to the complexity of the treatment.
Abscess
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complications
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Adult
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Aged
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Blood Coagulation Disorders
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complications
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Diabetes Complications
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Hepatitis C
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complications
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Humans
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Male
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Mycoses
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complications
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Neck
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pathology
5.17β-Estradiol and fulvestrant inhibit glomerular mesangial cell fibrogenesis downstream of protein kinase C activation
Yichen LI ; Chuanlin SHI ; Xuansheng DING
Journal of China Pharmaceutical University 2017;48(2):208-213
To investigate the effect of estrogen receptor (ER) agonist 17β-estradiol and G protein-coupled estrogen receptor 1 (GPER) agonist fulvestrant on masangial cell fibrogenesis under protein kinase C (PKC),we quantified type Ⅳ collagen (COL4A1),fibronectin (FN1),connective tissue growth factor (CTGF) and transforming growth factor-β1 (TGFβ1) gene transcription and semi-quantified phosphorylation of Akt signal upon Phorbol 12-myristate 13-acetate stimulation (which increased COL4A1,FN1,CTGF and TGFβ1 gene transcription to 2.5-0.5,1.4 ±0.2,26 ± 11 and 1.9 ±0.3 times compared with baseline,P <0.05) when incubated with the two drugs.It was found that 17β-estradiol and fulvestrant down-regulated COL4A1,FN1,CTGF and TGFβ1 genes transcription (P <0.05) and Akt signaling under PKC activation via ER and GPER.ER and GPER agonists are beneficial in protecting the mesangial cells from fibrogenic stimuli by inhibiting PKC signaling and excessive extracellular matrix production.
6.Effects and possible mechanisms of nerve growth factor on serum levels of VEGF and SDF-1 protein expression in rats with focal cerebral ischemia
Xiaoqiang LI ; Li LING ; Chuqiao LI ; Wenbin MA ; Yichen YIN
The Journal of Practical Medicine 2017;33(7):1021-1024
Objective To investigate the effects and the possible mechanisms of nerve growth factor (NGF) on serum levels of vascular endothelial growth factor (VEGF) and stromal cell-derived factor 1 (SDF-1) protein expression in rats with focal cerebral ischemia.Methods Male Sprague-Dawley rats weighting 200 ~ 250 g were subjected to middle cerebral occlusion (MCAO).MCAO rats were randomly divided into NGF group,saline control group and NGF+PI3K antagonist group (n =12).The neurological function was evaluated on the 4th,7th day after MCAO,and the serum levels of VEGF and SDF-1 protein were measured by ELISA.Results The neurological function was better in rats of the NGF group than those of the saline control group and NGF+PI3K antagonist on the 4th,7th day after MCAO (P < 0.05).The serum levels of VEGF and SDF-1 protein of the NGF group was significantly higher than that of the saline control group and NGF+PI3K antagonist group on the 4th day after MCAO (P < 0.05).Conclusions Treatment with NGF may improve neurological function of rats with focal cerebral ischemia,and upregulate serum levels of VEGF and SDF-1 protein expression.PI3K/AKT signal pathway may have attended the above regulation.
7.Research progress of sorbent hemoperfusion blood compatibility
Di WU ; Tao LI ; Shuaishuai TIAN ; Yichen LI
International Journal of Biomedical Engineering 2014;37(3):179-182
Hemoperfusion is a kind of medical device which contacts directly with blood.In the application,fully considering the interaction between the blood and the sorbent material,so as to improve the blood compatibility is particularly important.With the development of medical science,chemistry and biomedical engineering,a variety of new materials of hemoperfusion have been studied and the blood compatibility of hemoperfusion sorbent has also been greatly improved,making the range of hemoperfusion clinical applications increasingly wide.This paper,combining related research results in recent years,reviews the research progress of the hemoperfusion adsorbent's blood compatibility in recent years.
8.Study on adsorption specificity of HB-H-6 resin
Shuaishuai TIAN ; Yichen LI ; Di WU ; Hongxing GUO ; Tao LI
International Journal of Biomedical Engineering 2013;36(6):332-335,347
Objective The aim of this article was to deeply study the effects of different molecular weight of proteins and different structures of chemical substances on the adsorption specificity of HB-H-6 resin.Methods HB-H-6 resin was adopted to adsorb 5 different molecular weight proteins and different structural chemical substances including proteins,saccharides,human serum albumin (HAS),dextran and lipid,and then underwent static adsorption experiments in vitro.The adsorption rates of different structural chemical substances were analyzed from two experiments and the results were compared.Results The experiment results of HB-H-6 resin adsorption showed that the average adsorption rates of 5 different molecular weight proteins,myoglobin (Myo,16 700),ovalbumin (OVA,44 000),HAS (66 200),β-gal (130 000) and IgG (150 000),were significantly different:(0.00±0.33)%,(8.02± 1.23)%,(43.19±2.31)%,(34.25±1.07)% and (0.00±0.69)%.In the studies on adsorption of different structural chemical substances,the average adsorption rates of different structural chemical substances proteins,saccharides,lipid were significantly different:the absorption rates of plasma total protein,albumin,globulin,glucose,triglyceride and cholesterol groups were:(11.18±0.72)%,(10.74±0.66)%,(11.74± 1.22)%,(7.17±0.12)%,(1.06± 1.04)%,(3.05± 0.65)%.The absorption rates of HAS and dextran groups were:(43.19±2.31)% and (5.44±1.46)%.Conclusion In conclusion,the proteins' molecular weight of best adsorption condition is from 66 Ku to 130 Ku.The average adsorption rates of different structural chemical substances proteins,saccharides,lipid are significantly different.The average adsorption rates of proteins are higher than that of saccharides and lipid.It shows that HB-H-6 resin has adsorption specificity on different molecular weight proteins and different structural chemical substances.
9.Imaging findings of global choroidal hemangioma
Rongxian ZHOU ; Mingshun ZOU ; Yi LI ; Yichen LI ;
Chinese Journal of Radiology 2001;0(02):-
Objective To describe CT and MRI findings of the global choroidal hemangioma, and to investigate their value in the diagnosis and differentiation. Methods Nine choroidal hemangioma patients proven by surgical pathology( n =3)or clinic information ( n =6) were analyzed. CT scan was performed in 6 cases and MRI in 4 cases. All cases were examined by ultrasound and 3 with fundus fluorescein angiography (FFA). Results Two cases showed slight or crescent like thickening and iso density with respect to the global wall on CT scan. 5 cases on enhanced CT showed a flat or shuttle shaped homogeneous mass with marked enhancement. MRI ( n =3) revealed high signal intensity on T 1WI and low signal intensity on T 2WI with respect to the vitreous. 1 small tumor was found clearly by postcontrast fat suppressed T 1WI. Ultrasound showed homogeneous mass ( n =1) and inhomogeneous mass ( n =8), with retinal detachment in all cases. Conclusion CT + MRI + ultrasound can get most of the diagnostic imaging data for choroidal hemangioma. MRI was superior to CT and ultrasound in the diagnosis of choroidal hemangioma and differential diagnosis from other malignant tumors.
10.Impacts of the essential medicine system on rational drug use in community health service centers
Yuexia GAO ; Yichen LI ; Guoen LIU ; Lei ZONG ; Jing XIAO
Chinese Journal of Hospital Administration 2013;29(7):488-491
Objective To evaluate the impacts of the essential medicine system in Jiangsu Province on rational drug use in community health service centers.Methods 7667 outpatient prescriptions from 6 community health service centers in Nantong were selected by cluster sampling from January 2009 to December 2011,the part of SDUIs(Selected Drug Use Indicators)developed by WHO and the self-design indicators were employed to analyze rational use of drugs.Results After implementation of the essential medicine system,the average types of drugs per prescription decreased from 3.02 to 2.74,the rate of antibiotic drugs usage dropped from 61.43% to 51.2%,the rate of one antibiotic usage reduced from 33.94%to 28.58%,and two types from 20.43%to 15.8%,all with significant differences(P<0.001).The average expenses in single prescription arose from RMB 69.70 to 87.28,the rate of essential medicine usage increased from 81.22%to 85.60%,the injection utilization decreased from 31.14% to 14.13%,while TCM utilization ascended from 16.17%to 21.8%,all with significant differences(P<0.001).Condusion The essential medicine systems has positive impacts on rational drug use,but the expenses of per prescription are higher,and irrational antibiotic drugs are still a serious problem.