Objective To prepare a 10-hydroxycamptothecin (10-HCPT) loaded folate-receptor targeted phase-change contrast agent (FR-HCPT-PNPCA),and to study the general characteristics including drug loading,phase changing and targeting capability in vitro.Methods Using a method of two-step emulsification,the phase-change nanoparticles loading anticancer drug (10-HCPT) with lipids shell and liquid pefluorocarbon core were prepared.The entrapment efficiency and the drug-loading amounts were studied by high performance liquid chromatography,and the phase transition of the nanoparticles after heating was observed.The targeting ability was evaluated on liver cancer cell line 7721 in vitro.Results The FR-HCPT-PNPCA,with a drug encapsulation rate of about 70.42 ％ and drug loading amounts of about 20.05 ％,was prepared successfully.When being heated to 70℃,obvious phase changing and microbubbles generating could be observed under microscope.In addition,a large amount of FR-HCPT-PNPCA particles could adhere specifically around the 7721 cells.Conclusion The prepared FR-HCPT-PNPCA,which has a stable characteristic and high performance of drug loading and tumor targeting,is expected to become a promising multifunctional molecular ultrasound probe for diagnosis and treatment of tumor.

Objective To discuss the therapeutic methods and strategies of fractionated embolization in treating large cerebral arteriovenous malformation (cAVM). Methods During the period from May 2005 to May 2013 at authors’ hospital, endovascular fractionated embolization was performed in 35 cases with large cAVM. The lesions were located in the frontal lobe (n = 11), the parietal lobe(n = 8), the temporal lobe (n = 6), the occipital lobe (n = 4), the lateral temporal area (n = 2) and the deep white matter and basal ganglia (n = 4). The longest diameter of the lesions was 6 - 12 cm, with a mean of 7.23 cm. The number of supply vessels was 2 - 5. The lesions were drained by superficial veins in 13 cases, by deep veins in 9 cases and by both superficial and deep veins in 17 cases. The exit stenosis of the draining vein was seen in 3 cases, while the dilatation of the draining vein was found in 6 cases. Angiography showed that the lesions were situated at the right side in 16 cases and at the left side in 19 cases. Results A total of 297 times of embolization operating-process were carried out in the 35 patients, of which NBCA was used in 107, ONYX in 153 with, FuAiLe medical adhesive in 15, combination use of NBCA and ONYX in 9 and combination use of ONYX and FuAiLe medical adhesive in 13. No death occurred after treatment. After the first embolization, the residual malformation volume usually decreased to < 50%. The interval between the first and the second embolization was 1 - 3 months. Generally, two to four times of embolization were performed in each patient. Complete occlusion of the lesion was obtained in 26 cases, and sub - complete occlusion of the lesion (> 80%embolization) in 9 patients. Good recovery was achieved in all patients. After fractionated embolization, the volume of the cAVMs was decreased gradually and ultimate clinical cure was achieved, which laid the foundation for conducting further micro - neruosurgery or radiation therapy. Conclusion For the treatment of large cerebral arteriovenous malformation, fractionated embolization has reliable therapeutic effect. Therefore, this technique should be recommended in clinical practice.

To investigate the effects of dopamine on lactic acid and nitric oxide in severe scalded rats′ serum, 30%TBSA (total body surface area) scalded rats were placed with cardiac catheters and intravenously resuscitated with dopamine [3?g/kg?min], then the contents of lactic acid and nitric oxide in serum were measured. The results showed that treated rats have significant low serum lactic acid and nitric oxide contents than those of the control rats, especially at 3 to 12 hours after scald. Therefore, dopamine could reduce the serum lactic acid and nitric oxide contents of scalded rats in shock stage.

Objective To investigate the effects of Tong-Xin Luo (TXL) on the proliferation of human umbilical vein endothelial cells (ECV-304) cultured in vitro. Methods The TXL-contained serum was prepared, and ECV-304 were incubated with 5%, 10% and 15% serum containing TXL, respectively, for 4 hours and 8 hours. The cell morphology was observed and cell proliferation ability was determined by MTT. Results OD value of TXL group was higher than that in control group(P

Drug therapy is one of the efficient methods for prostate cancer treatment. However, drug resistance greatly hindered the treatment of prostate cancer patients. Herein, the mechanisms of drug resistance in prostate cancer have been exhaustively reviewed, and that can provide an alternative strategy and new targets for anti-prostate cancer therapy.
Drug Resistance, Neoplasm ; Humans ; Male ; Prostatic Neoplasms ; drug therapy

Objective To explore the change of serum osteopontin levels in preoperative and postoperative patients with non-small cell lung cancer (NSCLC) and its clinic significance.Methods The levels of serum osteopontin were detected by ELISA.Results In 88 NSCLC patients,serum osteopontin levels were significantly higher than in benign pulmonary disease and healthy control group(P＜0.05.P＜0.01.respectively) There was no difference between benign pulmonary disease and healthy control group(P＞0.05).Serum osteopontin levels were related to clinical stage and lymph node metastasis,and the levels of serum osteopontin were lower in postoperative patients than in preoperative cases(P＜0.05).For NSCLC.the detection of osteopontin had a sensitivity of 84.1%,a specificity of 92.5%,and an accuracy of 88.1%. Conclusion Increased serum levels of osteopontin may be useful as a helpful clinical biomarker to diagnose earlier,predict prognosis and differentiate from benign pulmonary disease.

Objective To study preliminary the accuracy of clinical target volume (CTV) and internal target volume (ITV) automatically generated by an in-house deformable registration software on fourdimensional CT (4DCT),and evaluate its feasibility of clinical application.Methods Clinic treated one lung cancer patient and one liver cancer patient were selected for the study.CTV was delineated by radiation oncologist according to a single respiratory phase image of 4DCT scanning,and then deformed to the other phases and generated the CTVdefm on each phase image.Differences between the CTVdefm and CTVmanu were then compared.A composite ITVcopm was created by overlapping all the CTVdefm of 10 phases and compared with the ITVMIP which was contoured on the maximum intensity projection (MIP) CT images,including the shape,volume and geometric center position of the ITV contour.Results For the tested lung case,average volume difference between the CTVdefm and CTV was (-2.59 ± 5.02)％ for the all 10 phases,and the vector departure of the two ITV centers was (1.04 ± 0.89) mm.The ITVcomp almost completely matched the ITVMIP on the tested liver case with a volume difference smaller the 1％ and only 1.4 mm vector departure between their geometric centers.Conclusion The validity of the CTVdefm and ITVcomp gained from automatic deformation of manual delineation reference based on 4DCT images were preliminary evaluated and proved to be good enough for clinic planning.

Objective To investigate the influence of arsenic trioxide (AS2 O3 )in the vasculogenic mimicry (VM ) of HepG2 cells, and to preliminary clarify the possible mechanism of inhibition of AS2 O3 on the VM. Methods Themean inhibitory concentration (IC50 )of AS2 O3 72 h after treatment of HepG2 cells was calculated by CCK-8 assay.The HepG2 cells were cultured on 3-D Matrigel and randomly divided into control group, 1/2 IC50 AS2 O3 group and IC50 AS2 O3 group.IPP software was used to calculate the number,length and area of VM,and the expression levels of VM-related proteins VE-cadherin and MMP-2, apoptotic-related protein caspase-3 and proliferation-related protein PCNA were detected by Western blotting method.Results The IC50 of AS2 O3 was 10μmol·L-1 72 h after treatment of HepG2 cells.The number,length and area of VM in 1/2 IC50 and IC50 AS2 O3 groups were significantly lower than those in control group (P<0.01);the number,length and area of VM in IC50 AS2 O3 group were also lower than those in 1/2 IC50 AS2 O3 group (P<0.05).Compared with control group,the expression levels of VE-cadherin and MMP-2 in 1/2 IC50 and IC50 AS2 O3 groups were decreased (P<0.05),and the expression levels of caspase-3 and PCNA had no significant change (P>0.05).Conclusion AS2 O3 can inhibit the forming of VM of HepG2 cells,which indicated that its mechanism may be related to inhibiting the expressions of VE-cadherin and MMP-2 .

Objective To evaluate the safety and feasibility of injection test which is used to locate esophageal balloon catheter.Methods A prospective study was conducted. The patients undergoing invasive mechanical ventilation (MV) admitted to general intensive care unit (ICU) of Beijing Tiantan Hospital Affiliated to Capital Medical University from May 2015 and March 2017 were enrolled. The commercially available esophageal balloon catheter was modified to perform injection test. The catheter was withdrawn step by step and the injection test was repeated until the presence disturbance wave presented, which indicated that the balloon had just entered the esophagus. The position where disturbance wave appears was named 0 cm. End-expiratory occlusions were performed at the positions of+15,+10,+5, 0, -5, -10 and -15 cm, respectively, and the changes of esophageal pressure (Pes) and airway pressures (Paw) were measured in the spontaneous breathing and passive ventilation, and the ratio between the changes (ΔPes/ΔPaw) was calculated.Results A total of 20 patients were enrolled, of which 15 patients finished both the spontaneous and the passive ventilation parts, and 2 patients finished only the spontaneous part and 3 patients finished only passive part. ① Disturbance waves could be induced by injection test in all patients. The average depth of disturbance wave in spontaneous breathing was deeper than that in passive ventilation (cm: 42.4±3.8 vs. 41.8±3.3), but there was no significant difference between the two ventilation settings (P = 0.132). No adverse events occurred during the study period. ② Pes increased with the stepwise withdraw of esophageal catheter, reached the maximal value at+5 cm, and then decreased when the catheter was further withdrawn, no matter in the spontaneous or the passive ventilation. In spontaneous breathing, the ΔPes/ΔPaw was within the ideal range (0.8-1.2) at the positions of 0, -5 and -10 cm. The ΔPes/ΔPaw was closest to unity at the positions of 0 cm (0.98±0.15). The ΔPes/ΔPaw at -15 cm (0.66±0.26) was significantly lower than that at 0 cm (P < 0.05). For passive ventilation, the ΔPes/ΔPaw was within the ideal range at the positions of -5 cm and -10 cm, and the ΔPes/ΔPaw was closest to unity at the positions of-10 cm (0.94±0.12). The ΔPes/ΔPaw at 0 cm and -5 cm was significantly higher than that at -10 cm (1.43±0.31 and 1.12±0.14, respectively); while the ΔPes/ΔPaw at -15 cm (0.68±0.23) was significantly lower than that at -10 cm (allP < 0.01).Conclusions Ideal position of the esophageal balloon catheter could be determined quickly and easily by using injection test. The method is safe and clinically feasible.Clinical Trial Registration Clinical Trials, NCT02446938.

Objective To investigate the effects of posterior fossa operation analgesia with tramadol compound dexmedetomi‐dine ,and the feasibility of reducing the dosage of tramadol .Methods Forty cases undergoing posterior fossa operation were ran‐domly divided into dexmedetomidine group (group A) and control group (group B) .Patients in group A with tramadol compound dexmedetomidine intravenous infusion analgesia ,reducing the dosage of tramadol .Group B with tramadol intravenous infusion anal‐gesia .To observe two groups of patients with preoperative ,postoperative 1 ,6 ,12 ,24 ,48 hVAS score ,Ramsay score ,heart rate , blood pressure ,respiratory rate ,SpO2 ,the postoperative complications such as nausea and vomiting ,and carries on statistics analy‐sis ,the two groups of patients with postoperative analgesic and sedative effect evaluation .Results VAS score :postoperative at each time point ,there was no significant difference between groups (P>0 .05) .Ramsay score :after operation and postoperative at each time point ,the experimental group were significantly higher than those in the control group (P<0 .05);the incidence of nausea and vomiting ,restlessness complications ,the experimental group was significantly lower than that of the control group (P<0 .05) .Con‐clusion Posterior fossa operation patients with tramadol and dexmedetomidine postoperative to analgesia could reduce the dosage of tramadol ,reduce nausea and vomiting ,restlessness and other complications ,and the analgesic effect is ideal .It was favorable to ob‐serve the postoperative condition .