Objective To detect the expression of NRP‐1 in gastric cancer tissue ,to analyze its relationship with clinicopath‐ological features ,and to explore its value in judging the prognosis of gastric cancer .Methods The clinical pathologic data and prog‐nosis situation in 168 cases of gastric cancer were retrospectively analyzed .The expression of NRP‐1 in gastric cancer tissue and normal tissue was detected by the immunohistochemical method .The relationship between the expression of NRP‐1 with the clinico‐pathological features and prognosis was investigated .Whether NRP‐1 serving as a reference indicator for judging the prognosis of gastric cancer was evaluated .Results (1) In 168 cases ,the NRP‐1 expression in gastric cancer tissue was higher than that in nor‐mal tissue (66 .7% vs .8 .33% ,P<0 .05) .(2) The NRP‐1 expression was related with the tumor size ,differentiation degree ,infil‐trative depth ,lymph node metastasis and TNM stage(P<0 .05) .(3)The median survival time in the patients with high NRP‐1 ex‐pression was shorter than that in the patients with low NRP‐1 expression (P<0 .05) .(4) The multiple factor analysis by COX pro‐portional hazard model showed that the NRP‐1 expression was an independent risk factor for the prognosis of gastric cancer(P<0 .05) .Conclusion (1)NRP‐1 plays an important role in the incidence and development process of gastric cancer and its expression is closely related with the malignant biological behavior of gastric cancer .(2)The high NRP‐1 expression prompts poor prognosis .(3) NRP‐1 may be expected to be regarded as one of the indexes for judging the biologic behaviors and prognosis of gastric cancer .

Objective To assess the safety and feasibility of CT-guided percutaneous argon-helium cryoablation in the treatment of adrenal tumors.Methods 1 7 patients with adrenal tumors were treated with CT-guided percutaneous argon-helium cryoablation. Three of these patients were retreated second cryoablation three months later due to the lager tumor diameters.Percutaneous tran-scatheter arterial embolization was performed in four patients because of rich blood supply before cryoablation.Continuous arterial blood pressure monitoring was performed in eight pheochromocytoma patients.Results Technical success was achieved in all pa-tients.There were no serious complications.Eight pheochromocytoma patients experienced a significant increase in systolic blood pressure and diastolic pressure when compared with the basic values (P <0.05).There were no enhancement on enhanced CT and/or up-take on FDG PET-CT in the ablated zones during the follow-up period (3-24months).Conclusion It is safety and efficacy of CT-guided percutaneous argon-helium cryoablation for adrenal tumor.It might be initial treatment of choice for the patients who were not suitable for resection.

OBJECTIVE: To study the effect of curcumin on the oxidative stress induced by nano-silicon dioxide( SiO_2) in A549 cells and to explore its potential mechanism. METHODS: A549 cells were randomly divided into 6 groups. Nano-SiO_2 group cells were stimulated with nano-SiO_2 solution with a final concentration of 20 mg/L; curcumin low-,medium-,and high-dose group cells were treated with curcumin at final concentrations of 5,10,and 20 μmol/L respectively and 20 mg/L nano-SiO_2 solution; the solvent control group was treated with dimethyl sulfoxide with a volume fraction of 0. 10%. The cells in the blank control group were not given any treatment. The cells in these 6 groups were incubated for 12 hours,and the level of malondialdehyde( MDA) and the activity of total superoxide dismutase( T-SOD) in the cells were measured by spectrophotometer. The relative expression of mRNA and protein of nuclear factor E2-associated factor 2( NRF2),thioredoxin-1( TRX1),and thioredoxin interaction protein( TXNIP) were analyzed by real-time fluorescent quantitative polymerase chain reaction and Western blot respectively. RESULTS: The MDA level in A549 cells of nano-SiO_2 group increased( P < 0. 05),the T-SOD activity decreased( P < 0. 05),and the mRNA and protein relative expression of NRF2 and TRX1 were up-regulated( P < 0. 05),TXNIP relative expression of mRNA and protein were down-regulated( P <0. 05),when compared with the blank control group and the solvent control group. After intervention with curcumin,with the increased of curcumin concentration,the MDA level in A549 cells decreased,the T-SOD activity increased,the relative expression of NRF2 mRNA and TRX1 mRNA and protein was up-regulated,the mRNA and protein relative expression of TXNIP was down-regulated,and showed a dose-dependent manner( P < 0. 01). CONCLUSION: Curcumin can protect nano-SiO_2-induced oxidative stress in A549 cells. It may activate TRX system by regulating NRF2/antioxidant response elements pathway,exerting an anti-oxidation effect and protecting cells from excessive oxidative damage.

Objective To investigate the feasibility,effectiveness,and technical superiority of Solumbra thrombectomy for treatment of acute large cerebral artery occlusion stroke.Methods 32 patients who had acute large cerebral artery occlusion stroke and received mechanical thrombectomy in TEDA Hospital of Tianjin between January 2013 and August 2016,were divided into two groups:stent group(with conventional stent-retrievers,n=21) and Solumbra group (with Solumbra thrombectomy,n =11).Clinical characteristics,variables correlated with operation,and clinical outcomes were compared and analyzed retrospectively.Results There were no differences in basic clinical and radiographic parameters between stent group versus Solumbra group (all P＞0.05).Moreover,there were no differences between Solumbra group versus Stent group in rates of embolus to new territory(18.2 ％ vs.28.6％,P=0.425),in times of thrombectomy(2.2± 1.0 vs.2.4± 1.3,P=0.657),in nonsymptomatic intracranial hemorrhage (18.2％ vs.14.3％,P =0.572),in symptomatic intracranial hemorrhage(18.2％ vs.9.5％,P =0.427),in TICI 2b/3 revascularization(81.8％ vs.81.0％,P =0.670),in puncture-to-reperfusion time[(66.4±39.0)min vs.(51.6±34.5)min,P=0.279],and in NIHSS at 7 days(11.6 ± 7.7 vs.11.3 ± 7.2,P =0.925).A modified Rankin Scale(mRS ≤2) is a variable of recovery of function and good clinical outcome at 90 days.The levels of mRS were similar(P =0.490)between Solumbra and stent groups,but there was a tendency to higher rate of good clinical outcome at 90 days in Solumbra group (63.6％,7/11)than in stent group (47.6％,10/21).Conclusions Solumbra thrombectomy as intravascular revascularization technique is an effective and safe strategy for endovascular recanalization of acute large cerebral artery occlusion stroke.Compared with conventional Stent-Retriever thrombectomy,Solumbra thrombectomy has a good clinical outcome tendency at 90 days after operation.

Objective To construct a human renal epithelial cell line HEK293T by CRISPR-Cas9-based site-directed knock-in of vascular endothelial growth factor 165 (VEGF165) gene, and avoid the off-target effect caused by lentivirus infection. Methods The VEGF165 expression vector with homologous arm (pUCm-T-VEGF165 plasmid) and the sgRNA expression vector [pSpCas9(BB)-2A-Puro-sgRNA plasmid] were designed and constructed based on the DNA sequence of the EZH2 gene, and then co-transfected into HEK293T cells. The expression of VEGF165 mRNA was detected by qPCR and the expressions of VEGF165 proteins were detected by Western Blot. Results The qPCR and Western Blot results showed that, comparing with the control, the pUCm-T-VEGF165 plasmid and pSpCas9(BB)-2A-Puro-sgRNA plasmid, the expression of the co-transfection plasmid were significantly increased, i.e. 3.42±0.30 vs. 1.02±0.21, 1.13±0.16 and 0.98±0.18 for the VEGF165 mRNA level (all P<0.01), and 1.13±0.16 vs. 1.02±0.06, 0.88±0.03 and 0.80±0.05 for the VEGF165 protein level (all P<0.01), respectively. Besides, the expression of EZH2 was significantly down-regulated, i.e. 0.14±0.06 vs. 1.08±0.11, 1.02±0.12 and 1.13±0.16 for the EZH2 mRNA level (all P<0.01), and 0.23±0.03 vs. 1.05±0.13, 0.91±0.04 and 0.81±0.06 for the EZH2 protein level (all P<0.01), respectively. This result showed that the VEGF165 was successfully inserted into the EZH2 genome, interfering the EZH2 expression. Conclusions VEGF165 gene can be successfully knocked into HEK293T cells by CRISPR/Cas9 system.

OBJECTIVE: To observe the time distribution characteristic of silica nanoparticles in rats after one-time intratracheal infusion. METHODS: Specific pathogen free male Wistar rats were randomly divided into one control group and7 experimental groups according to different time of intratracheal infusion( 1,3,5,7,14,21 and 28 days),6 rats in each group. The experiment groups were intratracheally instilled with 1. 0 mL silica nanoparticle suspension( mass concentration 50. 00 g/L). The control group was not given any treatment. Rats were sacrificed and their organ tissue samples such as serum,lung,spleen,liver and kidney were collected at different time points. The silicon levels of tissues were determined by inductively coupled plasma optical-emission spectrometry. The histology of rat's lungs was observed by optical microscope and the location of silica in lungs was observed by polarization microscope. RESULTS: After exposure to silica nanoparticles for 1-7 days,the changes of rats' lung tissue was mainly exudative inflammation. The changes of lung was proliferative inflammatory lesions after 14-28 days of exposure to silica nanoparticles. The visible nodules of cells were observed in the lung tissue in 28 days experiment group. The distribution of silica nanoparticles was observed obviously in the lung tissues of rats of 1 day experiment group under the polarizing microscopy. The tendency decreased with the increase of observation time. Silica nanoparticles were rarely seen 21 and 28 days after intratracheal infusion in rats. The silicon levels of serum,lung and spleen tissues reached the peak in 1 day after silica nanoparticles instillation,then dropped in 3-7 days( serum) or 3-14 days( lung and spleen tissues) and went back to that of the control group's. The level of silicon in the livers and kidneys of rats in the experimental groups showed no significant increase in the level of 1-5 day after the instillation( P > 0. 05),and showed significant increase in the level of 7 day( P < 0. 05). The level reached its peak on time points of 14 and 21 days after the instillation,and subsequently decreased,and didn't returned to normal till the 28 th day. The silicon levels of the lungs,spleens,livers and kidneys were all higher in rats than that of serum( P < 0. 05). The silicon levels of the lungs and spleens were higher than that of the livers and kidneys after instillation for1-5 days( P < 0. 05). The silicon levels of the lungs and spleens were both lower than that of the livers and kidneys after instillation for 14-28 days( P < 0. 05). CONCLUSION: Silica nanoparticles can cause lung injury when instilled intratracheally in rats. After instillation,silica nanoparticles were mainly distributed in the lungs and spleens after 1-5 days and distributed in the livers and kidneys after 14-28 days.

AIM: To observe the analgesic effect of esketamine in patients with thoracoscopic lobectomy. METHODS: Sixty patients scheduled with thoracoscopic lobectomy were randomly divided into group esketamine (ESK, n =30) and group saline (SAL, n = 30). Esketamine in ESK group was given 0.2 mg/kg at induction and 0.12 mg • kg