OBJECTIVE: Superoxide dismutase is one of the families of enzymes which is ubiquitous, and efficiently catalyzes the dismutation of superoxide anions.There are three superoxide dismutases in human brain that are of benefit to ischemic damage. In recent years, transgenic and knockout mutant mice has been widely used in the researches of superoxide dismutases for its protective effect in cerebral ischemia.DATA SOURCES: Using the terms "Chan PH and superoxide dismutase and cerebral ischemia", the relative articles published in the English from January 1991 to December 2003, were identified by searching the MEDLINE database with computer.STUDY SELECTION: The trials with transgenic and knockout mutant mice were identified preliminarily, then all remainders were searched in full content and were divided into intervention group and controlled group, the random cases were accepted, non-random excluded.DATA EXTRACTION: A total of 38 fully studies related to cerebral ischemia and superoxide dismutase were collected, among them, 13 random cases were accepted, and 25 excluded which included 15 repeated studies and 10 irrelevant studies.DATA SYNTHESIS: Reactive oxygen species involved in redox signaling pathways in ischemic cerebral, it can also cause oxidative damage of some macromolecules cell such as lipids, proteins and neucleic acid. In the ischemic brain tissue, overproduced oxygen radicals and consumption of superoxide dismutases lead to tissue damage. Copper-zinc superoxide dismutase, manganese superoxide dismutase and extracellular superoxide dismutase have the same function which can decompose superoxide anion radicals to form H2O2 that are scavenged further, thereby ameliorate edema formation,infarction and cell death, improve the function of ischemic cerebral tissue further.CONCLUSION: Increased oxygen free radicals is an important mechanism in ischemic cerebral damage, all three SOD can ameliorate cerebral ischemia. The protect effect of three superoxide dismutase is related to DNA repairing enzyme, transcription factor, apoptosis proteins and signal transduction pathway.

Objective To study the impact of mindfulness therapy on the surgical stressors of patients undergoing elective surgery. Methods One hundred and twenty patients undergoing elective surgery were randomly divided into the observation group and the control group according to the random number table with 60 in each group. The control group was treated with conventional care intervention and the former with nursing intervention based on mindfulness therapy, body scanning, mindful breathing, mindfulness meditation, walking meditation, mindfulness yoga and mindfulness aspect introspection, besides the conventional one. The intervention effect was compared between the groups by way of the Chinese version perceived stress scale (CPSS), self-rating anxiety scale (SAS) and self-rating depression scale (SDS). Result After the intervention, the scores of the observation group by CPSS, SAS and SDS were all significantly lower as compared to those of the control group (all P<0.05). Conclusion Mindfulness therapy can effectively reduce the level of perceived stress in patients undergoing elective surgery and relieve their anxiety and depression , which is conducive to the smooth operation and improvement of the operative quality.

50?10~9/L in MP group was 1,10,19,19 and in control group was 0,0,2,2,respectively.The ratio of the total effi- ciency was 93.7% in the treatment group and 80.6% in control group,respectively.The clinical efficacy was dif- ferent significant between groups after 2 weeks(P0.05).Conclusion High dose MP is more effective in the patients and with obvious hemorrhagic tendency than that those of the tradition- al treatment;whereas the traditional treatment is available for other severe ITP patients.

Objective To explore the relationship between collateral circulation and clinical manifestation after se-vere stenosis or occlusion of internal carotid artery. Methods According to the clinical manifestation, 78 cases of ICA ste-nosis or occlusion confirmed by digital subtraction angiography (DSA) were divided into two groups:asymptomatic group (n=31) and symptomatic group (n=47). Collateral circulation pathway in circle of Willis and the mean flow velocity of the middle cerebral arteries (MVMCA) were measured by Transcranial Doppler Ultrasonography (TCD). The correlation of the types of intracranial collateral circulation and clinical manifestation was analyzed. Results ① The collateral circulation opening rate of severe stenosis or occlusion of internal carotid artery in 78 cases of patients was 70.5%(55/78). The collat-eral patency rate (27/31, 87.1% of patients) was higher in asymptomatic group than in the symptomatic group (28/47, 59.6%of patients)(P<0.01).②Collateral patency of anterior communicating artery (ACoA)in asymptomatic group (24/31, 77.4%of patients) was higher than that in symptomatic group (20/47, 42.6%of patients) (P<0.01). Collateral patency of ophthalmic artery (OA) in symptomatic group (21/47, 44.7%of patients) was higher than that in asymptomatic group(6/31, 19.4%of patients)(P<0.05). The opening rate of ACoA was significantly higher than that of either the posterior commu-nicating artery (PCoA) or OA collateral circulation in asymptomatic group (P<0.05).③The mean flow velocity of the af- fected side middle cerebral arteries (MVMCA) in asymptomatic group (51.58±12.36cm/s) was significantly higher than that in symptomatic group (32.23±10.31cm/s) (P<0.01). Conclusion The clinical manifestation is closely related to arterial circle of Willis collateral circulation opening after severe stenosis or occlusion of internal carotid artery and collateral patency of anterior communicating artery is the major collateral supply vessel.

BACKGROUND:Apoptin is a protein which is synthesized in vitro or expressed by genetic engineering, without toxic and transformation activity of normal cel s. Apoptin can specifical y induce the apoptosis of tumor cel s and provide the opportunity of inhibiting the growth of cancer.
OBJECTIVE:To construct a prokaryotic expression vector for apoptin, optimize the expression conditions, and detect the activity of the purified protein.
METHODS:The apoptin gene that had been constructed was cloned into prokaryotic expression vector pET-28b (+), which was transformed into E.coli host bacteria. Apoptin was induced by isopropyl-beta-D-thiogalactoside, and analyzed by polyacrylamide gel electrophoresis. The inhibition activity of apoptin on tumor cel s was detected.
RESULTS AND CONCLUSION:Apoptin gene was successful y cloned into pET-28b (+). Apoptin protein was induced to express in form of inclusion body by isopropyl-beta-D-thiogalactoside (0.5 mmol/L) at 26 ℃. And the expression of apoptin with relative molecular mass of about 15 000 was identified by polyacrylamide gel electrophoresis. The target protein was purified by denaturation-renaturation and affinity chromatography, which has pro-apoptotic effect on lung cancer cel s H460 and H1299. The prokaryotic expression vector pET-28b-apoptin is successful y constructed. The apoptin protein with bioactivity is obtained, which al ows further functional study of apoptin.

Objective:To investigate the curative effect of hysterectomy and lymph node dissection with laparoscope or laparotomy on elderly patients with cervical cancer.Methods:60 elderly patients with cervical cancer were enrolled in our hospital from January 2014 to January 2016 and randomly divided into two groups.Group A (n=30) accepted hysterectomy and lymph node dissection with laparotomy,and Group B (n=30) adopted same surgery with laparoscope,the operation condition and postoperative recovery were compared between two groups.The intraoperative and postoperative complications of all patients were recorded and analyzed,and the quality of life of patients was evaluated in the following-up period.Results:The number of lymph node dissection in Group B was significantly more than that of Group A (P＜0.05);the intraoperitive blood loss and the times of using postoperative analgesia pump in Group B were significantly fewer than those in Group A (P＜0.05).The time of postoperative exhaust,bladder function recovery,drainage tube retention and hospital stay in Group B were all shorter than those in Group A(P＜0.05).The incidence of massive hemorrhage during operation and postoperative urinary retention and lymphatic cyst in Group B were significantly lower than those patients in Group A (P＜0.05).After operation 3 and 6 month,the I-QOL and FACT-G scores of patients in Group B were significantly higher than those in Group A (P＜0.05).Conclusions:Hysterectomy and lymph node dissection under laparoscope had remarkable curative effect on the elderly patients with cervical cancer,which improved the postoperative recovery and the quality of life of patients.

Objective To analyze the genetic variation of low density lipoprotein receptor(LDLR)gene in patients with familial hypercholesterolemia(FH).Methods Polymerase chain reaction(PCR)was used to amplify the promoter region and the 18 exons of LDLR gene family with the patients' genomic DNA as templates.DNA sequencing of the PCR production was used to find mutations in patients with FH.Results A novel missense mutation(G→T)in exon 4 was identified by DNA sequencing in the proband and his mother,and the mutation was characterized at nucleotide site of 385 in exons of coding region,with tyrosine substitute for aspartate at amino acid site of 108.Conclusion Characterization of the novel mutation provides an example of the genetic basis of LDLR causing FH.

AIM: To isolate targeted the peptides that binding and internalizing into endometrial carcinoma cell line EAC. METHODS: The tumor cells were screened five rounds of whole cell screen through the Ph.D.-12 phage display library. Analysis of the displayed peptides specific binding efficiency to the tumor cells was proceeded. The DNA of phages was extracted, sequenced and translated to the sequences of amino acid and analysis using computer software. RESULTS: After five biopannings, the isolated phages showed high specificity and strong affinity for their cognate cell types relative to different cell lines. Through sequencing, the sequences of displayed peptides were obtained. CONCLUSIONS: Whole cell screening against EAC cells through random phage peptide library can obtain phage peptides with a highly tissue specific binding and internalizing ability. The peptides do provide a basis for tumor's targeted delivery as therapy vector.

Objective To evaluate the accuracy of five blood glucose measurements commonly used in ICU and to determine the potential factors interfering the accuracy. Method This prospective study carried out in consecutively enrolled 49 patients stayed more than 48 hours in the medical ICU of Peking Union Medical College Hospital from November 2007 to January 2008. A total of 130 blood samples were measured to determine blood glucose with five different methods, and the biochemistry analyzer in central laboratory was regarded as reference method for comparison with other four methods, ( 1 ) capillary blood/glucometer;(2) arterial blood/glucometer; (3) arterial blood/blood gas analyzer; and (4) arterial blood/biochemistry analyzer. The accuracy of a method tested was judged by the difference in level of blood glucose between it and reference method, correlation coefficient, bias correction factor and discrepancy. The independent factors for the discrepancies were identified by multivariate logistic regression. Results The values of differences in level of blood glucose between above four methods and the reference were ( 1.7 ± 1.4) mmol/L,( 1.6 ± 1.4 ) mmol/L, ( 1.1 ± 1.2) mmol/L, and (0.5 ± 1.2 ) mmol/L, respectively. The rates of discrepancy were 66.9%, 63.8%, 40.0% and 23.8%. The correlation coefficients were 0. 844, 0. 845, 0. 895and 0. 896. The bias correction factors were 0. 821,0.831,0.914 and 0. 979. Decrease in hematocrit was statistically associated with the discrepancy between glucometer analysis methods and the reference, with OR of 0.923 for capillary blood ( P = 0.03 ) and 0. 912 for arterial blood( P = 0.014), respectively. Conclusions Glucometer analysis poorly correlated with reference method and blood gas analysis in ICU patients. Decrease in hematocrit significantly increased the degree of discrepancy in glucose measurements between glucometer analysis and the reference.

Objective To study the effects on electroporation of Qingfengteng cataplasma transdermal absorption and describe the characteristics of animal pharmacokinetics of it.Methods Two-chamber diffusion cell was used and the plasma drug concentration was determined by HPLC.The application of AIC theory to analysis of the compartmentally based model of sinomenine transdermal delivery by electroporation.Results The Cmax,Ka,and AUC0→∞ of electroporation was larger than those of passive diffusion;t1/2(Ka)and tmax of electroporation were reduced compared with passive diffusion.The drug concentration-curve equation were C=2.884?(e-0.056 t-e-0.232 t)and C=2.512?(e-0.058 t-e-0.149 t)for electroporation and passive diffusion,respectively.Conclusion The change of in vivo drug concentration of Qingfengteng calaplasma transdermal absorption by electroporation could be analized in accordance with mammillary one-compartment open model.The etrectroporation technology could sharply enhance the bioavalibility compared with the passive diffusion.