Radiotherapy is one of the most important methods to treat malignant tumors. Due to the presence of radiation resistance, the effect of radiotherapy is not entirely satisfactory. To alleviate radiation resistance and improve the radiotherapy effect, radiosensitizers have emerged. As a newly discovered radiosensitizer, RRx-001 has a good clinical application prospect. This paper reviewed the research progress of RRx-001 in source, safety, radiotherapy sensitizing activity and related mechanisms.

Objective To investigate the application of transthoracic echocardiography (TTE) and 320-row CT in diagnosis of complex congenital heart disease(CCHD).Methods A retrospective analysis was performed in 68 patients with CCHD,which contained the echocardiographic apprarance,320-row CT and surgical outcoming.All of malformations were divided into three groups:intracardiac group,heart-large vascular connecting group and extracardiac group.Results One hundred and eighty-four malformations were comfirmed by surgery in the 68 cases.The misdiagnosis and missed diagnosis rate of CT and TTE:for the intracardiac anomalies were 12％ (11/93),1％ (1/93) respectively (P ＜ 0.05),for the heart-large vascular connecting malformation were 4％ (2/49),6％ (3/49) respectively (P ＞ 0.05),and for the extracardiac anomalies were 2％(1/42),19％(8/42) respectively (P ＜0.05),for the total anomalies were 8％(14/184),7％ (12/184) respectively (P ＞0.05).While it was 1％ (2/184) in diagnosis of total anomalies by both CT and TTE.Conclusions Both 320-row CT and TTE have their own advantages and shortcomings in the diagnosis of CCHD.Joint application of two methods could reduce the rate of misdiagnosis and missed diagnosis of CCHD.

Background and purpose:At present,the treatment of metastatic breast cancer has remained diff icult for patients who have failed after the use of anthracycline and taxane,so the treatment options for those with advanced metastatic breast cancer are very limited.Therefore,pemetrexed combined with cisplatin in the treatment of anthracycline and taxane failed advanced metastatic breast cancer patients,its effi cacy and adverse reactions were studied.Methods:10 patients with advanced metastatic breast cancer patients received pemetrexed and cisplatin chemotherapy,pemetrexed 500mg/m2 intravenous infusion,cisplatin 75mg/m2 intravenous drip,repeated every 3 weeks.Evaluation of response and adverse reactions were practiced every 2 cycles.Results:10 patients were evaluable,CR 1 patient,PR 4 patients,SD 2 patients,PD 3 patients.With a median follow-up of 6 months(4-18 months),8 patients survived and 2 patients died.The median time to progression was 4 months(3-14 months),the median survival time was 8 months(4-18 months).The most common adverse reaction was fatigue,white blood cells decrease and the digestive tract reactions,followed by oral ulcers.Conclusion:Pemetrexed combined with cisplatin in the treatment of anthracycline and taxane treatment failed patients with advanced metastatic breast cancer could improve survival,adverse reactions could be tolerated.

Objective To investigate the qualitative diagnostic value of MRCP in patients with benign obstructive jaundice.Methods MRCP and conventional MR images were performed in 128 patients with benign obstructive jaundice on a superconductive MR scanner (Plilips medical systems Inc. Eclipse. 1.5T) . Final diagnosis was confirmed by surgical and histopathological findings in 123 patients and other 5 patients by follow-up.Results The accuracy of location diagnosis of MRCP was 100%; the qualitative diagnosis was 95.3%. The specificity, accuracy, sensitivity of the deadwood-sign for diagnosis of benign obstructive jaundice were 100%, 95.3%, 85.7% respectively. Conclusion The deadwood-sign was a specific indicator in MRCP of benign obstructive jaundice.

Spontaneous intracerebral hemorrhage is the most deadly type of stroke.Its 30-day mortality rate is nearly 40％.More than 30％ of patients with spontaneous intracerebral hemorrhage will have hematoma growth,which lead to poor outcomes.In addition to the classic predictors,some inaging signs also have important implications for identifying hematoma growth,such as swirl sign,blend sign,and black hole sign on nonenhanced CT scans,extravasation sign on contrast-enhanced CT scans,spot sign on CT angiography,leak sign revealed by the modified imaging method,as well as the spot sign on CT peffusion imaging.

Aquaporin4(AQP4),a member of the aquaporin family,is mainly expressed inastrocytes end-feet in the central nervous system. A large number of experimental studies have show n that AQP4 expression plays an important role in the occurrence, development, and regression of brain edema after different types of stroke. In addition, the AQP4 expression can affect the development process of cerebrovascular disease through the mechanisms such as affecting the integrity of the blood-brain barrier and promoting astrocyte migration, nerve regeneration, and neuroinflammatory response. Investigation of regulation mechanisms of AQP4 in transmembrane transport of substance in brain and intracel ular and extracel ular environmental balance and its expression in model of cerebrovascular disease have an important significance for understanding the occurrence, development, protection, and treatment of clinical cerebrovascular disease.

Aim To investigate the influence and molecular mechanism of C-phycocyanin(CPC) from Spirulina platensis on apoptosis of HeLa cells in vitro.Methods Firstly,the effect of purified CPC on proliferation of HeLa cells in vitro was determined by MTT assay,and then electron microscope was exploited to observe the characteristic apoptotic features of cells treated with CPC.Subsequently,genomic DNA changes of HeLa cells were observed by agarose electrophoresis.Flow cytometric analysis revealed the influence of different concentrations of CPC on cell cycle of HeLa cells.The expressions of apoptosis related genes of CPC treated HeLa cells were determined by immunohistochemistry analysis.In addition,the activities of caspases and the release of cytochrome c from mitochondria into the cytosol were detected.Results Compared with control cells untreated with CPC,a significant decreased in the numbers of HeLa cells in survival treated with CPC and concentration dose effects existed.CPC could induce characteristic apoptotic features including cell shrinkage,membrane blebbing,microvilli loss,chromatin margination and condensation into dense granules or blocks.DNA of HeLa cells treated with CPC showed fragmentation pattern(DNA ladder of oligomers of 180~200 bp) typical for apoptotic cells.HeLa cells treated with different concentrations of CPC demonstrated an increasing percentage of cells in sub-G0/G1 phase.In addition,CPC could promote the expression of pro-apoptotic gene(Fas and ICAM-1);meanwhile,held back the anti-apoptotic gene(Bcl-2) expression,and then facilitated the transduction of tumoral apoptosis signals that resulted in the apoptosis of HeLa cells in vitro.In CPC treated HeLa cells,CPC treatment of HeLa cells also resulted in activation of caspases and release of cytochrome C from mitochondria into the cytosol.Conclusion C-phycocyanin from Spirulina platensis can induce the apoptosis of HeLa cells in vitro.By virtue of the promotion of the apoptosis signals transduction in HeLa,CPC realizes its antitumor activities.

Based on the structure characteristics of the stretcher base of WCY2000field ambulance,this paper sets up a finite element analysis model with twotypes of beam elements.The accuracies under twotypes of elements are discussed and model method of the same structure is presented.

To explore the mechanism of electroacupunture (EA) of Zusanli (ST36)in protecting gastric mucosa of dogs.Twenty mongrel dogs were randomly allocated to four groups: blank control group (Group A), non acupoint group (Group B), Shangjuxu (ST37) group (Group C) and Zusanli (ST36) group (Group D). Dynamic gastric mucosal blood flow (GMBF) was monitored by laser Doppler flowmeter and calcitonin gene related peptide (CGRP) contents in plasma and gastric mucosa were measured simultaneously by radioimmunoassay method. After sixty minutes of EA, GMBF and CGRP contents in plasma and gastric mucosa were increased in Group D (P

Objective Understanding the current elderly people’s excessive demand for inpatient services under NRCMS,summarizing characteristics and analyzing causes so to provide inspiration and support for the rational use of health services in rural areas.Methods 1 665 medical records of seniors were randomly selected from medical institutions of county and township levels in 2012.Based on such data,135 household surveys were made,comparing the reasonableness of their hospitalization.Results The unreasonable rate at county level is 14.29%,and 30.10% at township hospitals;The unreasonable rate of internal medicine,surgery and other sections at county level hospital are 1 7.65%、10.38%、9.49%,the unreasonable hospitalization rate of internal medicine,surgery and other sections at township hospitals are 31.98%, 1 9.77%,and 45.83% respectively;The unreasonable hospitalization rate of circulatory system,skeletal muscle type,injury and poison at county level hospital are 20.55%、24.00%、4.76%,the unreasonable rate of the circulatory system,skeletal muscle type,injury and poison at township hospitals are 35.69%,44.74%and 10.91%respectively.Elderly people’s excessive demand for inpatient services varies with their living condition,physical condition,the NCMS compensation policy and other factors.Conclusion To reduce the excessive demand,we put forward effective control measures from the service system,security system and social support,so as to effectively meet reasonable hospitalization demands in rural areas and social problems so incurred.