Objective: To introduce 3 methods for preparation of stomach-conserving gastroesophageal reflux disease (GERD)model in rats, so as to improve the quality and successful rate of model preparation. Methods: Male Sprague-Dawley rats were divided into sham-operated(SO) group (n=20) and 3 stomach-conserving reflex model groups: duodenogastroesophageal reflux (DGER) group (n=47, esophagogastroduodenal anastomosis), gastroesophageal reflux(GER) group(n=20, partial pyloric ligation + cardiomyotomy followed by gastric fundus-esophagus anastomosis) and duodenoesophageal reflux (DER) group (n=21, jejuno-esophageal anastomosis followed by duodeno-esophageal anastomosis). Rats were observed closely after operation and their body weights were monitored. The rats that died unexpectedly were autopsied immediately and the surviving rats were sacrificed to observe the esophageal pathological changes at 1, 2, 3, and 4 months after operation. Results: Three rats died due to anesthetic accidents; 26 (24 .1%) died unexpectedly after operation, 18(38.3%)in DGER group, 1 (5%) in GER group, and 7(33.3%)in DER group; no rat died in SO group. Necropsy showed that the death cause of rats included obstruction, infection, asphyxia, hemorrhage, anastomosis leakage and perforation, etc. Esophageal pathological changes were noticed in all rats of 3 model groups; the life quality of surviving rats was good. Conclusion: The 3 methods for establishing rat stomach-conserving GERD model can produce high quality model and high rate of pathological changes, but with high post-operation mortality. In addition to rational operative methods, avoiding post-operation complications and unexpected death are also very important for successful GERD model preparation.

Peripheral nerve injuries, the worldwide difficult and complicated diseases, cause serious dysfunction but without ideal strategies to assist the successful treatment and recovery. The primary strategy to repair the peripheral nerve injuries is to bridge the lesions by promoting axon regeneration. The importance of mechanical factors in the nervous system has been appreciated only recently. It has been demonstrated that the application of external mechanical force is able to direct axonal outgrowth and to stimulate axonal elongation. For this purpose, to direct axonal growth cones in vivo with accurate force appears to be a challenge that must be resolved. Bionanotechnology is promising a new tool that offers the possibility to influence the process of axonal regeneration. The magnetic force generated by the interaction between Magnetic nanoparticles (MNPs) and magnetic fields provides remote, non-invasive, accurate, and controllable lead and control of neuronal axon regeneration.

Objective: To study the impact of ticagrelor on inlfammatory factors in patients with unstable angina pectoris (UAP) after percutaneous coronary intervention (PCI).
Methods: Based on conventional medication, a total of 100 UAP patients after PCI were randomly divided into 2 groups for anti-platelet therapy:Treatment group, the patients received aspirin+ticagrelor and Control group, the patients received aspirin+clopidogrel. n=50 in each group, all patients were treated for 12 months. Plasma levels of inlfammatory factors were examined before treatment and 24h, 7d, 28d after the operation. The patients were followed-up for 12 months for ischemic events, bleeding events and adverse drug reactions.
Results: Before treatment, plasma levels of IL-6, IL-18, TNF-α, PDGF were similar between 2 groups (t=0.1356, 0.1668, 0.2473, 0.5780, all P>0.05). At 24h post-operation, the above inlfammatory factors were signiifcantly increased by peaks in both groups and decreased thereafter. At 24h, 7d and 28d post-operation, the levels of IL-6, IL-18, TNF-a, PDGF in Treatment group were all lower than Control group at each corresponding time point (at 24 post-operation, t=2.0856, 2.4399, 2.2217, 2.2053, all P<0.05), (at 7d post-operation, t=6.0978, 5.9705, 4.4631, 4.3963, all P<0.01) and (at 28d post-operation, t=9.3779, 9.7724, 5.5855, 6.1700, all P<0.01). The follow-up study presented that at 12 months post-operation, the ischemic events in Treatment group was lower than Control group (χ2=4.3956, P<0.05);there were no small hemorrhage or major bleeding events occurred;the slight adverse drug reaction was similar between 2 groups (χ2=0.1773, P>0.05).
Conclusion: Compared to clopidogrel, ticagrelor could better decrease plasma levels of inlfammatory factors, it may reduce ischemic events without elevate bleeding events.

Objective To investigate the distribution and antibiotic resistance of isolated pathogens in neonatal sepsis. Methods The results of blood culture and drug susceptibility test in neonates sepsis from January 2012 to June 2013 were retro-spectively analyzed. Results One hundred and thirty-two strains were detected in the blood samples, with 100(75.76%)Gram-positive bacteria, 30 (22.73%) Gram-negative bacteria and 2 (1.52%) fungus. Staphylococcus epidermidis, Escherichia coli and Staphylococcus aureus were the three most common pathogens. Gram-positive cocci was strongly resistant to penicillin (100.00%), erythromycin, selectrin and ampicillin/sulbactam (62.50%-100.00%), but still sensitive to vancomycin and teico-planin. The resistance rate of Gram-negative bacilli to ampicillin was 100.00%, and the resistance rate to cefatriaxone, selectrin and cefuroxime was 61.54%-100.00%. The resistance rate to imipenem and piperacillin/tazobactam was lower. Conclusions The selection of sensitive antibiotics should be based on the pathogens and drug resistance testing for the treatment of neonatal sepsis.

OBJECTIVE:To evaluate the curative efficacy of granulocyte macrophage colony stimulating factor (GM-CSF) as an adjunctive therapy for the treatment of acute myeloid leukemia (AML). METHODS: Randomized controlled trials (RCTs) of GM-CSF in the treatment of AML were retrieved from PubMed,EMBase,Cochrane Library,CBMdisc and CNKI database by computer as well as from the leukemia-related journals manually for a quality evaluation of the methodology and Meta analysis using RevMan5.0 software. RESULTS: A total of 10 RCTs were included,of which,3 RCTs were graded as A,5 as B and 2 as C. The results demonstrated that there were no significant differences of indexes among groups as complete remission (CR) rate,relapse rate,infection rate and length of hospital stay,etc. CONCLUSION: The available clinical research results showed that GM-CSF adjunctive therapy could neither increase CR rate,nor decrease the relapse rate,infection rate or length of hospital stay.

Paris polyphylla, the dried rhizome of Paris polyphylla Smith Var.yunnanensis (Franch.) Hand-Mazz.or Paris polyphylla Smith Var.chinensis (Franch.) Hara, has been commonly used as a traditional Chinese folk medicine for thousands of years.The extensive pharmacological studies indicated that steroidal saponins had multiple pharmacological activities, such as potential anticancer activity, antibacterial, antivirus, hemostasis, sedative activity, protecting cardiovascular and liver tissues.Obviously, the studies on steroidal saponins activity are very important in the development and clinical application of the potential new drug.The recent research advances in the pharmacological activities of Paris polyphylla reported in the paper could provide reference for the further utilization of Paris polyphylla.

Objective To analyze the value of dynamic contrast-enhanced MRI(DCE-MRI) parameters of Extended Tofts and Exchange model in the differential diagnosis of hepatocellular carcinoma (HCC) and hepatic metastases of colorectal cancer. Methods A retrospective analysis of 40 pathologically confirmed cases was conducted , including 25 cases of HCC and 15 cases of hepatic metastases of colorectal
cancer,all patients underwent DCE-MRI. Applying liver double blood supplement model , and respectively using Extended Tofts two-compartment model and Exchange model liver microvascular permeability parameters [volume transfer constant of the contrast agent(Ktrans), efflux rate from extracellular extravascular space to plasma(Kep), extravascular extracellular volume fraction(Ve)and blood plasma space volume fraction (Vp)] and the perfusion parameter hepatic arterial perfusion index(HPI) in the lesion parenchyma of HCC and metastases were calculated. We used t test to compare the differences of the parameters measured from the two types of tumors , statistically significant parameters between HCC and metastases were screened which compared with the gold standard of pathological findings in order to draw the ROC curves to evaluate the diagnostic efficacy of different model parameters, using χ2 test compared the diagnostic accuracy of optimal parameters between the two models. Results By using Extended Tofts and Exchange model , Ktrans value of HCC were (0.661 ± 0.402)/min and (0.604 ± 0.316)/min respectively, Ktrans value of hepatic metastases were (0.196±0.175)/min and (0.179±0.135)/min respectively;Vp value of HCC were (0.334±0.217) and (0.294± 0.098), Vp value of hepatic metastases were (0.089 ± 0.015) and (0.089 ± 0.022),respectively; HPI value of HCC were (0.680±0.281) and (0.769±0.245) , HPI value of hepatic metastases were (0.326±0.216), (0.373± 0.298), respectively. There were significant differences between HCC and hepatic metastases in Ktrans, Vp and HPI values in both models(P<0.05). There was not statistically significant difference between HCC and hepatic metastases in Kep, Ve values(P>0.05).Drawn ROC curves of Ktrans, Vp, HPI , the Ktrans value (area under the curve of 0.869) among Extended Tofts model parameters was selected as optimal parameter to identify HCC and hepatic metastases; the HPI value (area under the curve of 0.845) among Exchange model parameters was selected as optimal parameter to differentiate these two types of tumors.The diagnostic accordance rate of Extended Tofts model and Exchange model were 80.0%(32/40), 82.5%(33/40), respectively ; There was no significant difference between them(χ2=0.082,P=0.775). Conclusions Parameters including Ktrans, Vp, HPI of the Extended Tofts model and Exchange model in DCE-MRI perfusion can be used to identify HCC and hepatic metastases of colorectal cancer. Among these parameters, Ktrans of Extended Tofts model and HPI of Exchange model have higher diagnostic value in differentiating HCC and hepatic metastases of colorectal cancer.

Objective To explore the effect of the DNA methyltransferase 5-aza-2'-deoxycytidine (5-aza-CdR)on human esophageal squamous cancer Ecal09 cells.nethods Human esophageal squamous cell cancer(ESCC)Eca109 cells were treated by 5-aza-CdR with 10-7,10-6,1O-5,10-4,0 mol/L. Respectively.Consequently,the growth rate of the cells was detected by MTT assay and morphological structure Was observed.Meanwhile,cell apoptosis and cell cycle were analyzed by flow cytometry method. (FCM).ResulIs The proliferation of Eea109 cells Was inhibited by 5-aza-CdR from 10-7 to 10-4 mol/L Moreover,the inhibition rate showed time-and-concentration-dependent manner(24～96 h,F=160.06,P=0.000,10-7～10-4 mol/L,F:60.95,P:0.000).The maximum rate of inhibitory was reached up to(15.70±0.75)% in the group treated by 10-4 mol/L 5-aza-CdR after 96 hours.An apoptosis peak appeared before diploid peak.The proportion of Go/G1 phase cells Was significantly increased(F=6479.46, P=0.000),especially up to(89.70±0.91)% in the group treated by 10-4 mo/L 5-aza-CdR after 96 h. However,the proportion of S phase cells Was obviously decreased(F=4222.26,P=0.000),especially down to(9.10±0.48)% in the group treated bv 10-4mol/L 5-aza-CdR after 96 h.Conclusions The proliferation of Eca109 cells is inhibited bv 5-aza-CdR in a time-and-concentration-dependent manner.Moreover,the 5-aza-CdR can inhibit cell growth by regulation of DNA cycle and apoptosis.

The paper is to report the development of an optic-fiber sensing technology method to analyze metronidazole tablets rapidly. In this fiber-optic sensing system, the light from source delivering to probe can be dipped into simple-handling sample solution, absorbed by the solution and reflected to the fiber-optic and detected in the detection system at last. Then the drug content can be shown in the screen from the ultraviolet absorption spectra and the consistency between that obtained by this method and that in China Pharmacopoeia can be compared. With regard to data processing, a new method is explored to identify the authenticity of drugs using the similarity between the sample map and the standard pattern by full ultraviolet spectrum. The results indicate that ultraviolet spectra of tablets can be obtained from this technology and the determination results showed no significant difference as compared with the method in China Pharmacopoeia (P > 0.05), and the similarity can be a parameter to identify the authenticity of drugs.

Objective To observe the change of capillary pericapillary cells in rats with myocardial infarction and the influence of supplementing qi and activating blood circulation herbs, and explore its mechanism of improving myocardial perfusion. Methods The rat model was established by ligaturing the left anterior descending coronary artery. On the base of ECG evaluation, successfully modeled rats were randomly divided into the model group, group treated with supplementing qi and activating blood circulation Chinese medicine (activating blood and supplementing qi group), group treated with Perindopril (Perindopril group), group treated with Tongxinluo Capsules (Tongxinluo group). The sham-operation group was taken as the control. There were totally 5 groups. The model group and the sham-operation group were treated with normal saline. The changes of myocardial capillary density (MCD) and number of pericapillary cells on the 7th, 28th day after medicinal administration were observed. Results On the 7th and 28th day, the MCD decreased significantly and the number of capillary pericapillary cells increased significantly in the model group compared with the sham-operation group (P<0.01). The MCD increased significantly in the activating blood and supplementing qi group, Perindopril group and Tongxinluo group compared with the model group (P<0.01). The number of pericapillary cells decreased significantly in the activating blood and supplementing qi group, Perindopril group and Tongxinluo group compared with the model group (P<0.01). Conclusion The supplementing qi and activating blood circulation herbs can improve regional myocardial blood supply by decreasing the number of pericytes and promoting regeneration of capillary.