1.Establishment of chromatin immunoprecipitation assay to analyze transcriptional regulation of gene expression
Chinese Journal of Laboratory Medicine 2001;0(05):-
Objective To establish a Chromatin immunoprecipitation assay to analyze transcriptional regulation of gene expression in hepatocytes. Methods The PEPCK gene was used as a target gene, HPRT, MBP and IgG were used as internal reference, the chromatin immunoprecipitation and PCR were performed with antibody specific for CREB to verify bindings of transcription factor CREB to the PEPCK promoter under various metabolic conditions. Results Transcription factor CREB occupies its target sites in the PEPCK promoter and this binding is increased by 4-fold during fasting in the anti-CREB antibody immunoprecipitated DNA fragments. Conclusion The results confirm that CREB binds to the PEPCK promoter and is involved in transcriptional regulation of PEPCK gene in hepatocytes.
2.Effects and Mechanisms of Pioglitazone on Expression of Glucose Transporter-4 in Cardiac Muscle Tissue of Rats with Diabetes Mellitus
China Pharmacy 2001;0(07):-
OBJECTIVE: To observe the effects of long-term administration of pioglitazone at different doses on the expression of glucose transporter-4(GLUT-4) of cardiac muscle tissue in rats and to discuss the possible mechanisms.METHODS: A total of 40 Wistar rats were enrolled,of which,10 were randomly assigned to normal control group(NC),and the other 30 were injected intraperitoneally with streptozotocin to establish diabetes mellitus(DM) rat model.After successful modeling,the rats were assigned to DM model group(DM,normal saline),high and low dose pioglitazone group(HP,LP;0.75,0.25 mg?kg-1?d-1).The NC groups received normal saline for 12 weeks.Blood glucose(BG) level before grouping(baseline level) and prior to death was determined by tail-cutting method.GLUT-4 level in cardiac muscle tissue and both protein and mRNA expression of AMPK? were determined by RT-PCR and western blot,respectively.RESULTS: As compared with NC group,the BG level in DM group was significantly increased but the expression of GLUT-4 and AMPK? decreased significantly(P
3.Comparative study on different methods for detecting plasma fibrinogen by automated coagulation analyzers
International Journal of Laboratory Medicine 2014;(15):2065-2066
Objective To comparatively analyze the results of the PT derivative method and the Clauss method for detecting fi-brinogen(Fib) by the automated coagulation analyzer and to explore their accuracy and clinical value .Methods Fib was detected in 156 blood samples selected from the patients in this hospital from March to May 2013 ,25 normal control samples and 13 positive samples of D-dimer (DD) by the TP derivative method and the Clauss method .Results The Clauss method and the PT derivative method by Sysmex CA-1500 coagulation analyzer had good repetitive rate in measuring Fib for 25 times ;when Fib<1 .0 g/L ,the results detected by these two methods had statistically significant difference (P<0 .05);when Fib in the range of 1 .0 -2 .0 g/L , 2 .1-3 .0 g/L ,3 .1-4 .0 g/L ,the detection results had no statistically significant difference between the two methods (P>0 .05);when Fib in the range of 4 .1 -5 .0 g/L ,the detection results had statistically significant difference (P<0 .05);when Fib>5 .0 g/L ,the detection results had statistically significant difference (P<0 .05);in 13 DD positive samples ,the detection results of the PT derivative method were significantly higher than those of the Clauss method with statistically significant difference (t=8 .530 , P<0 .05) .Conclusion The difference exists between the PT derivative method and the Clauss method for detecting Fib ,but the ac-curacy of the Clauss method is higher than its specificity ,the Clauss method should be the first choice for the clinical determination of plasma Fib .
4.The effect of preconditioning with buflomedil hydrochloride on expression of Bcl-2 and Bax on neuron cells of DRG after the sciatic nerve lesion model in rats
Journal of Chongqing Medical University 1986;0(04):-
Objective:To explore protective mechanism of buflomedil Hydrochloride on the neuron of damaged Sciatic nerve in rats. Methods:SD rats were divided into normal, model,buflomedil hydrochloride group in random. Preconditioned for 14 days,the sciatic nerve lesion models were performed, the Bcl-2 and Bax positive cells were counted by immmunohistochemistry at the end of 6h,12h,24h,48h,72h,96h,7days respectively. Results:(1) At the end of 12h after the model perfomed,The expressions of Bcl-2 in buflomedil hydrochloride group increased obvionsly than the normal and model groups,peaked at 24~48h,and at the end of 7days,the expressions of Bcl-2 in buflomedil hydrochloride group increased obviously compared with model group.(2)The expressions of Bax in buflomedil hydrochloride groug were lower than the normal and model groups in the same periods,and that was the lowest at the end of 7 days,It was different significantly than that of model group(P
5.Clinical analysis on complicated arrhythmia after 104 cases lung resection
Journal of Chongqing Medical University 2003;0(05):-
Objective:To analyze the reasons of complicated arrhythmia after resection of lung. Methods:The relation of arrhythmia with age, operation mode,preoperative lung function and postoperative blood gas of 562 cases of lung resection were analyzed. Results:There were 104 of 562 cases (18.5%) complicated with arrhythmia postoperatively. 38.77% of them were older than 70 years. 27.72% had operation of pneumonectomy.The parameters of FEV 1,MVV,FVC lower than 50% were 67.24%,46.53% and 67.93% respectively.Postoperative blood gas analysis of the 23 cases showed that Po 2 was lower than 60 mmHg,Pco 2 was higher than 45 mmHg,So 2 was lower than 96%.21 of them developed postoperative arrhythmia.After tracheotomy and immediately correcting anoxia,all the 21 patients recovered from arrhythmia within 3 days.4 patients died in this group(3.84%).Conclusion:Pneumonectomy,in patients older than 70,results in the parameters of FEV 1,MVV and FVC lower than 50%.Significant anoxia is the cause of arrhythmia.
6.The application of VATS in the diagnosis and treatment of small lung neoplasm
Journal of Chongqing Medical University 1987;0(01):-
Objective:To discuss the method of Video Assisted Thoracoscopy(VATS) in diagnosis and treatment of small peripheral lung neoplasm.Methods:A wedge-shaped excision with VATS had been performed on 20 patients with small peripheral lung neoplasm.The sample had been sent to pathology during surgery.Lobectomy was done with the malignant tumor.Results:14 cases(70%) were malignant in stage IA ,6 cases were benign.The mean follow-up time postoperatively was 24 months(12~36months),there was no relapse case.Conclusion:For those patients,the diameter of neoplasm is smaller than 15mm,and antibiotic treatment is ineffective for 2~3 weeks,VATS can be available for diagnosis and treatment.
7.Three Main Factors of Scientific Funds Management——CMA-L'OREAL China Skin/Hair Grant Management Experience
Chinese Journal of Medical Science Research Management 2013;(1):5-8
Based on 10 years management experience of CMA-1,OREAL China skin/hair grant,the article puts forward three main factors of scientific funds management,which are:adhereing to the fair and justice review,constantly strengthening the service consciousness and improving the service level,constantly perfecting the management system.The article also summarizes some specific experience and practice,including:Chinese and French experts joint review,avoid principle and double-blind review,Service provider role orientation,internet management platform development and whole process management,etc
8.Respiratory support and nutrition management in amyotrophic lateral sclerosis
Chinese Journal of Practical Internal Medicine 2001;0(02):-
Respiratory failure and respiratory complication are most reasons that result in death of ALS patients.Respiratory support,especially non-invasive Bi-level positive airway pressure,may improve living quality and prolong survival time.Treatment of respiratory support was gradually accepted and focused in the worldwide.In addition,malnutrition is an independent poor prognostic factor for ALS.Percutaneous endoscopic gastrostomy can ensure enough energy intake,improve nutritional status and prolong survival time.The profit and indication of BiPAP and PEG were Summarized.
9.Effects of Tsaoko-anemarrhenae Decoction on Apoptosis of the Hippocampal Neurons and it′s Gene Expression in Epileptic Rat Models.
Journal of Medical Research 2006;0(02):-
Epilepsy was arousing the attention of medical circles because of the complexity of its mechanism and the difficulty of its control.The project which used the pioneering research as the basement and was directed by the chinese medicine used the modern multidisciplinary research technologies and explored the mechanism of the brain damage in epilesy.The project′s treatment idea is different from the others,which provided a new way for seeking new medicines for treating epilepsy.The research techniques took use of the application of the behavioral methods and the electrophysiological methods creatively and the subject firstly used this way to observe it dynamically,which greatly improved the accuracy of evaluating the models and pharmacodynamics studies of the epilepsy.The research method of the project firstly observed the changing mechanism of the brain damage and the regulation of the apoptosis related genes,and even the efficiency of tsaoko-anemarrhenae decoction,which enriched the scientific intension of the decoction.The conclusions palyed a very important role in exploiting the new medicine for treating epilepsy and enriching the knowledge of the five visceras in chinese medicine.
10.Study on Copper Absorption, Accumulation and Tolerance Mechanism of Alfalfa
Chinese Journal of Analytical Chemistry 2017;45(8):1129-1136
To reveal the mechanism of Cu enrichment of alfalfa, in-situ micro-X-ray fluorescence spectrometry (μ-XRF) and fractional extraction were used to explore in-situ Cu distribution information in alfalfa seedlings and different combination forms of Cu in organs.The results showed that alfalfa roots were enriched with Cu up to 12.06 mg/g, which was 8 times of stem and 4.9 times of leaves.The in-situ μ-XRF result showed that the root of alfalfa was the main site of enrichment of Cu, and there was a barrier of Cu at the rhizome junction to alleviate the toxic effect of excess Cu on the shoots.Excess Cu (more than 50 μmol/L) also inhibited the uptake of Zn and Ca in alfalfa, enhanced the uptake of Fe in alfalfa, but had no obvious effect on the uptake of K and Mn.Plant fractional extraction showed that the Cu in root cells was mainly fixed in the form of insoluble residues (41%) and cell wall chelate (20%), while in the stem, Cu existed as four forms including hydrophobic protein binding, cell wall binding state, residual state and water-soluble state, which further reduce the excess transport of Cu to the leaves.In the leaves, excess Cu in the leaf cells was mainly in the vacuole and insoluble residue to achieve tolerance and detoxification to Cu.