2.Effect of chemotherapy sensitivity enhancement by RNA interference targeting p21-activated kinase 1 with 5-fluorouracil on human colon cancer cells
Haitao QING ; Wei GONG ; Side LIU
The Journal of Practical Medicine 2015;31(16):2598-2601
Objective To investigate the effect of p21-activated kinase 1 on chemotherapy sensitivity of 5-fluorouracil. Methods Cell proliferation was measured by CCK8 and apoptosis rate by flow cytometry or Hoechst staining; the expression of Bcl-xl, Bcl-2, XIAP were determined by Western Blot. Results 5-FU combined shRNA-Pak1 group (combination group) could be significantly inhibited in terms of proliferation (P <0.05). The percentage of apoptosis rate in combined group was the highest and the difference among groups indicated statistical significance (P < 0.05). The expression of Bcl-xl, Bcl-2, XIAP in combination group was significantly inhibited compared with 5-FU group or shRNA-Pak1 group. Conclusion PAK1 inhibited by RNA interference can enhance chemotherapy sensitivity of 5-Fu on growth inhibition and apoptosis induction in colon cancer significantly.
3.The application of EP14-A3 in the evaluation of endogenous antibodies interference in immunoassay reagent
Juan ZHANG ; Qing WEI ; Junjun LIU
International Journal of Laboratory Medicine 2015;(17):2533-2535
Objective To improve the deficiencies of current methods ,explore a new way to estimate endogenous antibodies in‐terference in immunoassay reagent .Methods According to EP14‐A3 ,RF samples and normal samples were tested at the same time by reference reagents ,reagent A and B respectively .Reagent A and B were to be evaluated .RF samples′location was compared to 95% CI of Deming regression line based on the normal samples .Results In comparison of reagent A vs .reference reagent ,RF sam‐ples exceeded 95% CI upper limit ,which indicated the anti‐interference ability to RF of reagent A was different from the reference reagent statistically .Meanwhile ,all RF samples tested by reagent B fell in 95% CI ,RF samples interfered reagent B hardly ,which indicated the reagent B had similar anti‐interference performance to RF as reference reagent .Conclusion The method from EP14‐A could intuitively reflect the resistance to endogenous antibodies for newly developed immunoassay reagents .
4.Clinical observation of intervention of group B streptococcus infection in gestation period
Wei SHEN ; Qing LIU ; Junzhi ZHANG
Chinese Journal of Postgraduates of Medicine 2012;35(12):12-14
ObjectiveTo observe the effection of different interventions of group B streptococcus (GBS) infection in gestation period.MethodsOne hundred and seventeen cases with GBS infection were obtained from 1885 pregnant women,who were got routine prenatal examination at 34 to 37 weeks of pregnancy,and drug seeitivity test of secretions which were taken from under paragraph 1/3 of vagina,and divided into treatment group (91 cases) and untreatment group (26 cases).The treatment group was divided into treatment group one (47 cases) and treatment group two (44 cases).Treatment group one was treated with oral antibiotics for 7 days after diagnosis,treatment group one and two were treated with postpartum antibiotics intravenous infusion once every 4 hours in labor.Comparison of maternal and fetal outcomes.ResultsThe GBS infection rate was 6.2% (117/1885).The morbidity of premature delivery,premature rupture of membrane and neonatal infection of treatment group [ 5.5% ( 5/91 ),13.2% ( 12/91 ),5.5% (5/91 ) ]were lower than those of untreatment group [ 19.2%(5/26),30.8%(8/26),23.1%(6/26) ](P < 0.05).The morbidity of premature dehvery and premature rupture of membrane of treatment group one[ 0,6.4% (3/47)]were lower than those of treatment group two[ 11.4% (5/44),20.5% (9/44)](P < 0.05).Conclusion Anti-GBS treatment can improve the outcomes of mothers and infants,especially early anti-GBS treatment during the period of pregnancy.
5.Enhancive Effect of TNF-a on Transfection Efficiency of Ad-mediated Multidrug Resistance Gene1 (MDR1) in Mononuclear Cells of Mouse
Wei LIU ; Qing LUO ; Xianqing JIN
Chinese Journal of Clinical Oncology 2010;37(3):138-141
Objective: To investigate the enhancive effect of TNF-α on transfection efficiency of adenovi-rus in mononuclear cells of mouse and the enhancive capability of protection of bone marrow by MDR1. Meth-ods: Before the mononuclear cells of mouse were infected by recombinant adenovirus encoding human MDR1 gene, they had been pretreated by TNF-α. Transfection efficiency of adenovirus was monitored by fluo-rescence microscopy, immunohistochemistry and flow cytometry (FCM). mRNA and protein levels of MDR1 in the mononuclear cells of mouse were detected by reverse transcription-polymerase chain reaction (RT-PCR) and Western blot before and after treatment of TNF-α. Results: After treatment of TNF-α, tansfection rates of adenovirus were obviously increased in the treated group (26.26%) compared with the untreated group (11.96%). mRNA levels and protein levels of MDR1 were obviously increased in the treated group compared with the untreated group. Conclusion: TNF-α could enhance transfection efficiency of adenovirus in mononu-clear cells of mouse and enhance capability of protection of bone marrow by MDR1.
6.Analysis of Chinese medicine on differentiation of symptoms and treatment of 36 cases of Sjāgre's syndrome
Qing LIU ; Wei ZHOU ; Ruifang ZHAO
Chinese Journal of Tissue Engineering Research 2005;9(27):234-235
BACKGROUND: Sjogre's syndrome is a common disease of aged people,in which, dry mouth and throat have disturbed chawing, swallowing and speech and have seriously affected living quality of patients. OBJECTIVE: To probe into the improvement of oral function treated with Chinese medicine based on differentiation of symptoms. DESIGN: Retrospective analysis on cases was designed. SETTING: Department of Periodontal Disease, College of Stomatology,Fourth Military Medical University of Chinese PLA. PARTICIPANTS: Thirty-six cases of Sjogre's syndrome were selected from clinic of Department of Periodontal Disease of Stomatology College of Fourth Military Medical University of Chinese PLA from May 2000 to February 2004, with agreement and in the know of patients. Of those, 5cases were male, 31 cases were female, aged varied from 27 to 70 years,with duration of sickness in range from 0.5 to 10 years. METHODS: ① On basis of moistening, drying up heat, producing fluid and stopping thirst, the drugs for activating blood circulation, resolving stasis, clearing away heat and detoxification were supplemented. Formula:shashen (Radix Glehniae), maidong (Radix Ophiopogonis), shihu (Herba Dendrobii), yuzhu (Rhizoma Polygonati Odorati), huafen (Radix Trichosanthis), xuanshen (Radix Scrophulariae), shengdi (Radix Rehmanniae), chenpi (Pericarpium Cirri Reticulatae), danshen (Radix Salviae Miltiorrhizae), banzhilian (herba Scutellariae Barbatae), bahuasheshecao (Herba Hedyotis Dissusae), etc. ②Treatment of vitamins and transfer factor were associated.③ Artificial saliva in local was applied to prevent from secondary infection. ④ It was to test 99Tc m parotid function (After 99Tc m was injected intravenously on elbow, the parotid uptaking and concentrated 99Tc m curve were traced immediately. When radioactivity intensity was increased to maximum, the patients were required to chaw Vit. C tablet, 200 mg. In following, it was to trace the minimum of 99Tc m radioactivity on decreased curve. Normal imaging was illustrated clearly, the development after Vit. C stimulationwas declined swiftly. Time-radioactivity curve illustrated obvious uptaking and excreting segments. Positive results were unclear parotid development or the development after Vit. C stimulation was not declined obviously. Time-radioactivity curve was of horizontal type, low-horizontal type, parabola type or persistent rising type), erythrocyte sedimentation (ERS) (Normal value: 0-15 mm/h for male adult, 0-20 mm/h for female adult) and a part of immunology, such as rheumatoid factor, immunoglobulin (I gG normal value: 7.6-16.6 g/L), immune complex, etc. The effect was determined as increased saliva secretion and improved oral function. MAIN OUTCOME MEASURES: 99Tc m parotid function test, rheumatoid factor, ERS, IgG and immune complex were applied to determine the therapeutic effects of Chinese herbs. RESULTS:Thirty-six cases all entered result analysis. ① After treatment, the positive rate of rheumatoid factor was lower significantly compared with that before treatment [36.7%, 73.3%,(x2=6.796, P < 0.01)]. The levels of ERS, IgG and immune complex were all decreased significantly compared with those before treatment [(35.50±5.65) mm/h,(13.47±1.58) g/L,(8.30±1.24) mg/L;(55.20±8.85)mm/h,(23.57±2.37) g/L,(14.96±2.21) mg/L; (t=3.549-4.962,P < 0.01)]. The result of 99Tc m parotid function test and main determined indexes had been improved for all. ② After treatment, dry mouth, dry eye and general symptoms were all improved of various degrees and saliva secretion was increased. Total effective rate reached 80.7%. CONCLUSION: Treatment based on differentiation of symptoms is applied in Chinese medicine. On basis of moistening, drying up heat, producing fluid and stopping thirst, the drugs for activating blood circulation, resolving stasis, clearing away heat and detoxification are supplemented and effectively promote rehabilitation of oral function in Sjogre's syndrome,such as chawing, swallowing, speech, etc.
7.A multiple correlation factor analysis of femoral head necrosis in patients over 45 years old with femoral neck fractures after closed reduction and cannulated screws fixation
Yue LIU ; Chang-Qing ZHANG ; Wei MENG ;
Chinese Journal of Orthopaedic Trauma 2004;0(07):-
Objective To investigate the multiple factors correlated to femoral head necrosis in patients over 45 years old with femoral neck fractures after closed reduction and cannulated screws fixation.Methods Three hundred patients with femoral neck fracture were admitted from May 1999 to May 2004 and treated by closed reduction and internal fixation with cannulated screws.We analyzed the multiple factors:age,gender,Garden classification,follow-up time,procedure delay,quality of reduction,time of full-weight-loading,fixation removal, and preoperative traction.Multiple correlation factors were analyzed by SPSS10.0 statistic system.Results Complete case records were documented in 99 cases who were followed up for an average of 24.5 months(range,8 to 60 months).Femoral head necrosis occurred in 15 cases(15.2%).Time of femoral head necrosis was 8 to 50 months after operation.The combination of quality of reduction,preoperative traction,age,and age?fixation re- moval was found to have the most significant influence on femoral head necrosis after internal fixation for femoral neck fractures.Conclusions Good reduction is the most important factor correlated to the outcome of a femoral neck fracture.Age is linked to the risk of necrosis but it is relatively insignificant.Preoperative traction in wrong positions can increase the incidence of necrosis.Garden classification is important in predicting femoral head necrosis and is associated with quality of reduction,but it is not a risk one in the combination of multiple correlation factors that lead to the necrosis.
8.Preparation and in vitro release feature of a scleral implant containing triamcinolone acetonide acetate
Lei HU ; Songqing LIU ; Wei GUO ; Qing DAI ; Yunjia LIU
Journal of Third Military Medical University 2003;0(08):-
Objective To prepare a biodegradable sckeral implant containing triamcinolone-acetonide-acetate(TAA) and polylactic acid(PLA) and investigate its release in vitro.Methods The TAA-PLA implant was prepared by melt-extrude technique.The drug release of TAA in vitro was determined by high performance liquid chromatography(HPLC).Results The implant was white pillar with 8 mm in length,8 mg in weight,and 0.8 mm in diameter.The drug loading was 30%.The drug was released at a steady and slow rate.Its accumulation release rate is 75.84% on the 30th day.Drug release profile in vitro was in accordance with Higuchi equation Q=0.137(t-0.752)1/2.Conclusion A sleral implant containing TAA-PLA is prepared,which has the evident feature in delaying the release of TAA and is biological degradable.It might be a novel vehicle for the topical use of TAA.
9.Extraction and purification of giant salamander skin mucous glycoprotein and study its anti-cancer activity of lung cancer
Weiliang XU ; Dejing CHEN ; Yu LIU ; Hong WEI ; Qing LIU
Chinese Journal of Biochemical Pharmaceutics 2015;(8):44-47
Objective To study the appearance of skin mucous glycoprotein in vitro on the activity of human lung cancer cells A549. Methods Used alkali extraction and DEAE-52 ion exchange chromatography and Sephadex G-100 gel chromatography purification salamander mucous glycoprotein; Salamander mucous glycoprotein inhibition of human lung cancer cells A549 was detected by MTT colorimetric method in vitro.ResuIts It showed that the total sugar content in the appearance of mucus was 4.23%, the relatively pure glycoprotein component, by SDS protein electrophoresis tests, it contained a single glycoprotein component, its molecular weight was about 30 kDa.With glycoprotein pure concentration increased from 1,10, 20,40μg/mL, the glycoprotein inhibition rate of A549 cells increased; when the glycoprotein concentration was 40 μg/mL, for 24 h action, the inhibition rate of A549 cells was up to 85.66 %, while the role of 48 h, the inhibition rate of A549 cells was up to 92.32%.Inhibition effect of mucus glycoprotein on A549 cell compared with positive control drug, had significant difference.ConcIusion Salamander mucus glycoproteins of human lung cancer cells has obvious inhibitory effect, can provide theoretical basis for the development of lung cancer drug resistance.
10.Association of chronic kidney disease and cerebral microbleeds in patients with ischemic stroke
Qing PENG ; Yining HUANG ; Wenhong LIU ; Ran LIU ; Wei SUN
Chinese Journal of Neurology 2014;47(11):747-751
Objective To investigate the association between the presence of cerebral microbleeds and chronic kidney disease in patients with ischemic stroke.Methods Patients with ischemic stroke within 1-6 months were consecutively recruited.Cranial MRI was taken within two weeks after recruitment.Cerebral microbleeds were assessed using Microbleed Anatomical Rating Scale on gradient echo MRI.Demographics including sex,age and risk factors were obtained.Chronic kidney disease was defined and classified according to National Kidney Fundation-Kidney Disease Outcome Quality Initiative Guideline.Glomerular filtration rate (GFR) was estimated by using the abbreviated Modification of Diet in Renal Disease equation.Results Of the 636 patients included,mean age was (59.8 ± 10.1) years,435 (68.4%) were male.Sixty-six had decreased estimated GFR (eGFR; < 60 ml · min-1 · 1.73 m-2).Two hundred and one (31.6%) patients had cerebral microbleeds,which were most commonly located in deep or infratentorial location (133/201,66.2%).The presence of cerebral microbleeds was much higher in patients with decreased eGFR than the others (48.5% (32/66) vs 29.6% (169/570),x2 =9.709,P =0.002).Age,history of hypertension and decreased eGFR were associated with the presence of cerebral microbleeds in univariate analysis.In multivariate analysis,decreased eGFR was independently associated with the presence of cerebral microbleeds in deep or infratentorial location (OR =1.457,95% CI 1.044-2.034,P =0.027),but not associated with the presence of cerebral microbleeds in pure lobe.Conclusion Impaired kidney function is associated with the presence of cerebral microbleeds in deep or infratentorial regions in patients with ischemic stroke.