Humans ; Minimally Invasive Surgical Procedures ; adverse effects ; methods

BACKGROUND:Tumor stem cels have self-renewal, drug resistance and metastasis tumorigenicity, which play an important role in occurrence, development and metastasis of tumors. Currently, there are two methods to identify tumor stem cels, namely, in vitro tumor sphere culture experiments and in vivo mouse tumorigenic experiments. However, there ia a lack of reports regarding clinicaly enriched gastric cancer cels by chemotherapy. OBJECTIVE:To investigate the enrichment of rat gastric cancer stem cels by cisplatin, and to explore the screening methods for their surface marker proteins. METHODS: BCG-823 gastric cancer model was established in rats, and then rat models were randomized into two groups: rats in experimental groups were subjected to intravenous injection of 0.1, 0.2, 0.25, 0.3 g/L cisplatin via the tail vein; those in control group were injected with normal salinevia the tail vein. After three courses of chemotherapy, gastric stem cels-enriched tissues were colected. Tumor surface proteins were extracted using high-throughput protein microarray and identified by western blot assay. Effects of cisplatin on enrichment of rat gastric cancer stem cels and screening methods for surface marker proteins were compared. RESULTS AND CONCLUSION:Cisplatin at a dose of 0.3 g/L×200μL exhibited the best therapeutic effects, and moreover, with the dose increasing, the tolerance became worse and the incidence of adverse reaction became higher. Transplantation tumors were verified by hematoxylin-eosin staining. Western blot test results were similar to the findings of protein microarray method, that is, HLA-DQ, PMP22 and Claudin7 protein expressions increased in gastric tissues, but HLA-DR, CD14, CD16 and CD56 protein expression decreased. These findings suggest that cisplatin can be used to enrich gastric cancer stem cels in rats, and to successfuly screen the corresponding surface marker proteins.

Objective To investigate the influence of antiepileptic drugs (AEDs) on levels of serum homocysteine (Hcy),folate,vitamin B12 and B6 in patients with post-stroke epilepsy (PSE).Methods The serum levels of Hcy,folate,vitamin B12 and B6 of 194 PSE patients with AEDs treatment for more than 1 year (AEDs treatment group) and 40 newly diagnosed PSE patients without AEDs therapy (control group) were detected.The effects of AEDs on above indexes were analyzed.Results Compared with control group,the serum level of serum Hcy was significantly increased,and the serum levels of folate,B12 were significantly decreased in AEDs treatment group (all P<0.05).The difference of the serum levels of vitamin B6 among the groups was not significant.Compared with monothetapy subgroup,the serum levels of Hcy was significantly increased in the combination therapy subgroup (P<0.05).Compared with control group,the serum levels of Hcy were significantly increased in patients with Valproate (VPA),Carbamazepine (CBZ) and Oxcarbazepine (OXC) monotherapy,the serum levels of folate were significantly decreased in patients with VPA and CBZ monotherapy,and the serum level of B12 was significantly decreased in patients with VPA monotherapy (all P<0.05).Compared with control group,the serum levels of Hcy were significantly increased in patients with 2 kinds of AEDs combination treatment [VPA+CBZ,VPA+Levetiracetam (LEV),VPA+OXC,CBZ+LEV] or ≥3 kinds of AEDs combination treatment,the serum levels of folate was significantly decreased in patients with 2 kinds of AEDs combination treatment (VPA+LEV,VPA+OXC,CBZ+LEV) or ≥3 kinds of AEDs combination treatment,the serum levels of B12 were siginificantly decreased in patients with 2 kinds of AEDs combination treatment (VPA+CBZ,VPA+OXC,CBZ+LEV) or ≥3 kinds of AEDs combination treatment (all P<0.05).The incidence of hyperhomocysteinemia (HHcy) in AEDs treatment group (36.6%) was significantly higher than that in control group (20.0%) (χ2=4.085,P=0.043).And the difference of HHcy incidence between the combination therapy subgroup (47.6%) and the control group was statistical significant (χ2=6.950,P=0.008).The difference of HHcy incidence between the monotherapy subgroup (33.6%) and the control group was not significant.The HHcy incidence of patients with VPA and CBZ monotherapy (40.5%;43.8%) were significantly higer than those in the control group (χ2=3.871,P=0.049;χ2=4.726,P=0.030).The differences of HHcy incidence between patients with OXC,LEV monotherapy (29.2%;22.9%) and the control group were not significant.Conclusions AEDs therapy has little influence on the serum levels of vitamin B6,while has great influence on the serum levels of Hcy,folate and vitamin B12.Combination treatment of AEDs and monotherapy of VPA,CBZ may increase the incidence of HHcy in PSE patients.

ObjectiveTo explore the early rehabilitation for the fracture suffered from earthquake. Methods11 cases were reported. ResultsAll the patients recovered satisfactorily. ConclusionEarly physiotherapy is effective on fracture suffered from earthquake.

Due to substantial morbidity and high complications, diabetes mellitus is considered as the third "killer" in the world. Medicinal fungal polysaccharides, as water-soluble macromolecular substances with low toxicity, exhibit diversified pharmacological actions such as immune regulation, anti-tumor, antivirus, antioxidant, anti-aging, hypoglycemic effect and improving liver and kidney function. In recent year, a number of investigators reported medicinal fungal polysaccharides showed good anti-diabetes and hypoglycemic activity, and their acting mechanisms involved in glycometabolism and β cell function, e. g. promoting glycogen synthesis, promoting glycolysis, inhibiting the activity of α-glucosidase, promoting insulin secretion, increasing insulin sensitivity, enhancing antioxidation. Therefore, the hypoglycemic activity and its mechanisms of action of medicinal fungal polysaccharides showed characteristics of multiple effects, multi-target, and multi-pathway regulation. These finding suggest that medicinal fungal polysaccharides are a promising source for the development of discovery of anti-diabetic agent.
Animals ; Carbohydrate Metabolism ; drug effects ; Fungal Polysaccharides ; pharmacology ; Humans ; Hypoglycemic Agents ; pharmacology ; Insulin Resistance ; Insulin-Secreting Cells ; drug effects ; Oxidative Stress ; drug effects

Adult ; Bronchoalveolar Lavage ; methods ; Humans ; Male ; Middle Aged ; Pneumoconiosis ; therapy ; Treatment Outcome

The association of serum nesfatin-1 levels with insulin resistance and pancreatic β-cell function in gestational diabetes mellitus was investigated.Oral glucose tolerance test(OGTT) was performed in ninety pregnant women from 24,to 28 gestational weeks.They were divided into three groups according to OGTT:45 nomal controls,27 gestational diabetes mellitus with fasting plasma glucose (FPG) of 5.1 mmol/L to 7.0 mmol/L (GDM1),18 gestational diabetes mellitus with FPG more than 7.0 mmol/L (GDM2).Serum nesfatin-1 levels were significantly higher in patients with GDM1 and GDM2 than in controls (P＜0.01),and in GDM2 group it was also higher than GDM1 group(P＜0.05).Fasting serum nesfatin-1 was positively correlated with FPG,30 min plasma glucose,1 h plasma glucose,2 h plasma glucose,homeostasis model assessment for insulin resistance,and PGAUC,but negatively correlated with homeostasis model assessment for β-cell function.Furthermore,multiple stepwise regression analysis showed that FPG was the independent influencing factor of serum nesfatin-1 level.Nesfatin-1 was positively correlated with insulin resistance,while negatively correlated with pancreatic β-cell function.Nesfatin-1 may play a role in the pathogenesis of gestational diabetes mellitus.

ObjectiveTo determine whether the inhibition of caveolin-1 tyrosine residues 14 (Cav-1-Y14) phosphorylation with protein tyrosine kinase inhibitors (PP2) will upregulate heme oxygenase-1 (HO-1) activity to protect against ventilation induced lung injury in vivo of an animal model.Methods Fifty-four male Sprague-Dawley (SD) rats were randomly divided into nine groups (eachn = 6). Group A served as normal control group, in which rats did not receive ventilation but tracheotomy. Groups B1 and B2 received lung protective ventilation respectively for 1 hour or 2 hours. Groups C1 and C2 received high tidal volume (40 mL/kg) ventilation for 1 hour or 2 hours, respectively. The group D1 or D2 also received high tidal volume ventilation for 1 hour or 2 hour respectively, but they were given PP2 1 hour before high tidal volume ventilation. The groups E1 and E2 also received high tidal volume ventilation respectively for 1 hour or 2 hours, but tyrosine kinase inhibitor PP2 and HO-1 inhibitor zinc protoporphyrinⅨ(ZnPPⅨ) were given to animals 18 hours before high tidal volume ventilation. All the animals were sacrificed after ventilation, and the specimens of lung tissues and bronchoalveolar lavage fluid (BALF) were harvested. Then the changes in pathology of lung tissue was observed, and diffuse alveolar damage scores (DAD) were calculated, myeloperoxidase (MPO) activity was measured by colorimetric analysis, lung wet/dry ratio (W/D) was estimated. The expressions of phosphorylated caveolin-1 (P-Cav-1-Y14), caveolin-1 (Cav-1) and HO-1 were determined by Western Blot. The expressions of high mobility group B1 (HMGB1) and advanced glycation end product receptor (RAGE) in lung tissues were assayed with immunohistochemistry staining. The levels of tumor necrosis factor-α(TNF-α) in BALF were measured by enzyme linked immunosorbent assay (ELISA).Results There was no significant difference in all the parameters between group A and groups B. Compared with group B1, DAD score, W/D ratio, the activity of MPO and the concentration of TNF-α in BALF in group C1 were significantly increased [DAD score:7.97±0.59 vs. 0.55±0.13, W/D ratio: 5.70±1.61 vs. 5.04±0.63, MPO (U/g): 1.82±0.14 vs. 0.77±0.26, TNF-α(ng/L): 370.10±29.61 vs. 54.38±8.18, allP< 0.05], and the injury in ventilation 2 hours group was more serious than that in ventilation 1 hour group. Compared with groups C, all the parameters in groups D were significantly decreased. The parameters in groups E were significantly higher than those in groups A, B, and D, but no significant difference was found as compared with groups C. Compared with groups B, the protein expressions of Cav-1 and P-Cav-1-Y14 (gray value) in groups C were significantly increased (1 hour: 1.49±0.02 vs. 1.26±0.13, 1.34±0.02 vs. 0.87±0.04;2 hours: 1.58±0.02 vs. 1.27±0.27, 1.31±0.01 vs. 0.95±0.02, allP< 0.05), and the expression of HO-1 protein (gray value) was significantly decreased (1 hour: 0.59±0.02 vs. 1.10±0.01, 2 hours: 0.49±0.01 vs. 1.20±0.02, both P< 0.05). No significant difference in Cav-1 protein expression between groups D as well as groups E and groups C. The protein expression of P-Cav-1-Y14 in groups D and E was significantly lower than that in groups C. The protein expression of HO-1 in groups D was significantly higher than that in groups C, but the phenomenon was not found in groups E as compared with groups C. Compared with group A, the positive expression of HMGB1 and RAGE in lung tissue in groups C and E was significantly increased, but no significant difference was found between groups B as well as groups D and group A.Conclusion Cav-1-Y14 phosphorylation is the key factor for ventilator induced lung injury, which can not only lead to a decrease in vascular barrier function, but also inhibit the activity of HO-1 enzyme, thus further aggravates inflammatory injury of the lung as induced by mechanical ventilation.

Objective To compare the high risk factors, complications, treatment and prognosis of respiratory distress syndrome (NRDS) in neonates at different gestational age (GA). Methods Between August 2012 and July 2013, 156 neonates with RDS were selected and distributed into 3 groups, 42 early preterm (GA<34weeks), 52 late preterm (GA 35 to 36 weeks), and 62 in term group (GA≥37 weeks). Retrospectively analysis was performed for high risk factors, complications, treatment and prognosis of the three groups. Results In 156 neonates with RDS, the male and female proportion was 2.25:1. All groups had more males, but the gender difference has no statistical signiifcance in three groups (P=0.923). The onset time of RDS and the hospitalization time both show an increasing trend of statistical signiifcance (P<0.05). Comparing the difference of high risk factors for RDS of the 3 groups, birth asphyxia, placental abnormalities, multiple pregnancy, premature rupture of membranes was most common in early preterm group, and followed by late preterm group, and C-section was most common in term group and unexplained preterm was more common in early preterm group than that in late preterm group (all P<0.05). Among the three groups, the ratio of pulmonary surfactant application was the lowest in the term group, the ratio of X-ray grade over II was high-est in early preterm group, oxygen and hospitalization time were the longest in early preterm group (P<0.05). The risks of com-plicated with pulmonary infection, intracranial hemorrhages and bronchopulmonary dysplasia were the highest in early preterm group and the risk of complicated pneumothorax was the highest in term group. Among three groups, the recovery rate was the lowest in the early preterm group (P<0.01). Conclusion The clinical characteristics, high risk factors, complications and treat-ment responses of RDS in neonates with different GA were different, so GA should be considered for diagnose and treatment. For the term infants, the elective caesarean section should be strictly controlled, in order to reduce the incidence of RDS.

Background Cystoid macular edema(CME) is an important cause of visual impairment of central retinal vein occlusion(CRVO).Spectral-Domain optical coherence tomography(SD-OCT) has increased speed and higher resolution,offering a better chance of understanding the morphological changes and pathogenesis of CME. Objective This study was to survey the morphologic features of macular edema associated with CRVO by SD-OCT. Methods Clinical data of the patients with CRVO diagnosed in Department of Ophthalmology,Peking Union Medical College Hospital from March 2008 to August 2009 were retrospectively analyzed.SD-OCT features of macular edema induced by CRVO were analyzed and recorded.Results The average macular foveal thickness was(527.5±218.2) μm in macular edemas eyes.Main morphological changes included 55 cases(84.6%) of CME,15 cases of(23.1%) serous macular detachment(SMD),and 10 cases(15.4%) of simple macular edema,and these findings occurred at the same time in some eyes.Cystoid spaces in the parafoveal region were seen in the inner nuclear layer,outer plexiform layer and outer nuclear layer,and discontinuous or weak inner segment/outer segment(IS/OS) line was often seen in CME.The incidence of CME associated with incomplete posterior vitreous detachment(PVD) was 14.5%,and that of neural epithelial edema associated with incomplete PVD was 10.0%,showing an insignificant difference between them(χ2=0.000,P=1.000).The average area of SMD was 1838.4μm ×1428.1μm×190.1μm,and the incidence of partial PVD was higher(χ2=4.266,P=0.039).Conclusion SD-OCT can reveal the micro-morphological change of macular zone in macular edema eye.SD-OCT enabled visualization of its spatial extent in each retinal layer and the condition of IS/OS layer.Serous macular edema is related with partial PVD.