Objective To study the impact of gaseous formaldehyde exposure on the metabolism of nitric oxide (NO) in the lung tissue of mice. Methods The adult male Kunming mice were randomly divided into 4 groups, treated with gaseous formaldehyde (0,0.5,1,3 mg/m3) for consecutive 72 h in the simulated exposure chamber, the nitric oxide synthase (NOS) activities and the NO positive rate in mice's lung were measured with the reagent kits. Results The lower formaldehyde exposure (≤0.5 mg/m3 ) could decrease NOS activity (compared with the control, P

Objective To investigate the right ventricular function of patients with chronic pulmonary hypertension using Doppler tissue imaging(DTI)and to evaluate the relationship between DTI parameters and pulmonary artery systolic pressure(PASP).Methods Thirty-five patients with chronic pulmonary hypertension and thirty-five healthy subjects underwent Doppler tissue echocardiographic evaluation of right ventricular function.The tricuspid lateral annular systolic velocity(Sm),early(Em)and late(Am)peak diastolic velocities,isovolumic contraction time(IVCT)and isovolumic relaxation time(IVRT)were acquired from apical 4-chamber view.Results When compared with control group,Sm,Ea and Em/Am values were found to be lower and Am,IVRT values higher in patients with chronic pulmonary hypertension.When all patients were analyzed,there was a significant positive correlation between PASP and IVRT(r=0.78,P

Age-related macular degeneration( AMD) is one of the major reasons of blindness among the elderly in the developed countries. As AMD patients are increasing year by year, AMD has become one of the important topics of ophthalmic research to prevent blindness. Its pathogenesis is not fully understood, but many studies have shown that vascular endothelial growth factor ( VEGF ) plays an important role in the pathogenesis. With the development and application of anti - VEGF drugs, there are a variety of drugs applied to the disease. This article introduces conbercept for the treatment of AMD.

The nutritional status in early life have been gradually recognized that it can change the status of development and metabolism of adults.Epidemiological evidence and animal model study have found that low birth weight is the risk factors of adult metabolic syndrome and cardiovascular disease.Insulin resistance is a common pathophysiological basis.Renin-angiotensin system and insulin signaling systems interact to promote the development of insulin resistance.

Objective To analyse the clinicopathological features of primary small intestine lymphoma(PSIL), and explore the relationship between clinical stage,histological findings,therapeutic modality and prognosis. Methods The clinical data of 34 cases of PSIL were collected,the pathohistological features and results of immunohistochemical examinations were obtained,and the follow-up findings were adopted for comprehensive analysis. Results Among these 34 cases of PSIL,abdominal pain or discomfort,gastrointestinal bleeding and abdominal mass were the predominant symptoms.PSIL mainly involved ileum,especially the bottom of ileum and ileocecal area.Among the 26 patients with follow-up for more than one year,the 1-year survival rate was significantly higher in patients without tumor perforation than those with tumor perforation(76.2% vs 20.0%)(P

Objective To evaluate the effect of stent implantation using Multimodal CT in patients with MCA and ICA stenosis. Methods Twenty-six patients with ischemic cerebrovascular disease who received MCA or ICA stent implantation in ChongQing xinqiao Hospital were recruited. Multimodal Stroke Assessment Using CT Score (MOSAIC) was used to evaluate the Neuroimaging data before stent implantation and Alberta Stroke Program Early CT Score (ASPECTS) to evaluate the time to peak (TTP) of CTP before and after stent implantation. Results Patients were divided into 4 groups based on scores: 4 scores, 5 scores, 6 scores, and 7 scores groups. the improvement degree was increase by 31.7%±14.17%、38.6%±15.73%、43.3%±10.3%、358.6%±13.45% in 4 scores, 5 scores, 6 scores, and 7 scores groups, respectively. The paired t test demonstrated that there were a statistically significant difference among four groups(H=10.673, P <0.05). Preoperative MOSAIC score was positively correlated with the improvement of ASPECT score for TTP, with a correlation coefficient of 0.579 ( P <0.002). Conclusions Multimodal CT is a sensitive assessment for the evaluation of ischemic cerebrovascular disease and patients with a higher MOSAIC score may benefit more from stent implantation.

Objective To investigate the mental health and its correlated factors for senile dementia caregivers in nursing homes in Shenyang. Methods Questionnaire survey was conducted among 174 senile dementia caregivers recruited from the Nursing Home of Shenyang and Shenyang Social Welfare Institute by using Symptom Check-List-90 (SCL-90), Social Support Rating Scale (SSRS) and self-designed general information questionnaire and to analyze the scores of self rating scale of nursing staff, the total score of social support scale, and the factors affecting the mental health status of nursing staff. Results The SCL-90 scores of senile dementia caregivers with education levels from illiteracy, primary school or junior high school, high school or secondary school, college or above were 130.50 ± 10.11, 132.70±12.55, 135.06±9.15, 129.24±8.83, the difference was statistically significant (F=15.05, P<0.01). The SCL-90 scores of senile dementia caregivers with poor, general and good perceived health status were 133.40±10.52, 132.60±11.32, 128.00 ±10.02, the differences were statistically significant (F=9.07, P<0.01). The SCL-90 scores of family monthly income of 1001 to 3000 yuan, 3001 to 5000 yuan and more than 5001 yuan were 132.90 ± 10.39, 132.80 ± 11.52, 131.50 ± 8.20, the difference was statistically significant (F=12.11, P<0.01). The multivariate linear regression analysis showed that the regression coefficient of perceived health status was-0.168 (t=2.880, P<0.01), monthly family income was-0.145 (t=-2.512, P<0.05), SSRS was 0.121 (t=2.112, P<0.05). Conclusions Mental health status of senile dementia caregivers in Shenyang is poor. The health sector should take some measures to improve the degree of social support, nursing staff wages and to ensure their health in order to promote physical and mental health of nursing staff and the nursing level so as to improve the quality of life of the senile dementia elderly.

Objective To explore the clinical and pathological feature of pediatric chronic gastritis and whether gastritics in children related to hericobacter pylori(Hp).Methods Retrospective analysis the result of 401 children with gastroendosopy and 100 species with Hp detected were performed.Results Superficial gastritis form mild to moderate was the mainly pathologic change in pediatric chronic gastritis,chronic inflammation was the mainly change in pediatric Hp infection,and the detected rate of chronic superficial gastritis from mo-(derate) to heavy was significantly higher than mild(?~2=7.61 P

Objective To explore the best serum-free cultural way in neural stem cells from the hippocampus of the newborn rats and observe the characteristics of growth,proliferation,and induced differentiation of neural stem cells.Methods The neonatal rats′ hippocampus tissues were dissociated mechanically.The cells were cultured in the serum-free cultural medium which were added separately basic fibroblast growth factor(bFGF),epithelium growth factor(EGF),bFGF+EGF by suspended cultural way.The neural stem cells were identified by nestin immunofluorescence.After induced differentiation of embryonic cow serum,the differentiated cells were identified.Results The serum-free medium added bFGF and EGF could perfectly induce neural stem cells to proliferate and the differentiated cells expressed the specific antigen of neurons,astrocytes and oligodendrocytes.Conclusion The serum-free medium with bFGF and EGF can be used to culture neural stem cells from hippocampus tissue of rats in vitro.

Objective To observe the changes of femur biomechanical properties in fluorosis rats. Methods Fifty Wistar rats of thirty-day old, weighing 90-100 g, were randomly divided according to body mass into fluorosis and control group of 25 each. Fluorosis group drank tap water containing 100 mg/L of fluoride, the control group drank tap water. The rats were observed of dental growing status and killed after feeding 6 months. Their femurs underwent tensile strength, impact, shear, bending experiments. Results The deteetable rate of dental fluorosis was significantly higher in fluorosis group[92%(23/25)] than control group[0(0/25),X2=38.97, P<0.01]. Biomeehanical data in fluorosis group(225.67±11.81,1.94±0.15,76.62±6.10,39.96.3±3.90) were lower than those of the control group(244.70±13.38,2.39±0.19,87.72±7.05,45.75±3.75) in experiments of tensile strength (MPa), impact toughness (J/mm2), shear and bending strength (MPa). The difference was statistically significant(t=3.372,5.879,3.756 and 3383, respectively, P<0.01) between the two groups. Conclusion Fluorides affected bone metabolism in rats, femur biomechanieal properties ehanged in fluorosis rats.