Objective:To analyze the screening results for chronic obstructive pulmonary disease (COPD) among residents aged 40 years and above in Shanghai Jiading Town, and to explore the influencing factors of COPD.Methods:The study was a cross-sectional study. Four hundred residents aged 40 years and above in Jiading Town were selected to attend COPD screening by multi-stage stratified random sampling method from 10 to 18 July, 2023. Information on demographic characteristics, disease history and family history, disease behavior and risk factors were collected by a questionnaire survey. Physical examination and pulmonary function tests were performed for all participants. Patients showing<70% FEV 1/FVC in pulmonary function and excluded of other cardiorespiratory diseases were diagnosed as the COPD. The SPSS 25.0 software was used for statistical analysis; and logistic regression was used to analyze the related factors of COPD. Results:There were 166 (41.5%) males and 234 (58.5%) females in the participants. The results of screening showed that 181 (45.3%) individuals were identified as high risk of COPD and 32 cases of COPD was diagnosed with a prevalence rate of 8.0%. The prevalence rate of COPD in males were significantly higher than that in females ( P<0.05). There were no significant differences in the age ( P=0.993), education level ( P=0.158), body mass index ( P=0.776), and waist-to-hip ratio ( P=0.833) between COPD patients and non-COPD participants. Logistic regression analysis showed that frequent coughing at 14 years of age and before ( OR=7.763, 95% CI: 2.898-20.791, P<0.05), Hospitalization for pneumonia or bronchitis at or before 17 years of age ( OR=4.359, 95% CI: 1.343-14.1462, P<0.05), asthma ( OR=11.800, 95% CI: 2.001-69.573, P<0.05), chronic bronchitis ( OR=72.748, 95% CI: 20.501-258.144, P<0.05), emphysema ( OR=23.600, 95% CI: 1.407-395.756, P<0.05),and other respiratory diseases, immediate family members with chronic bronchitis ( OR=6.112, 95% CI: 1.960-19.058, P<0.05) and family history of COPD ( OR=100.920, 95% CI: 14.625-696.390, P<0.05), smoking behavior ( OR=7.017, 95% CI: 2.605-18.906, P<0.05), living with daily smokers ( OR=35.481, 95% CI: 1.609-782.310, P<0.05), and second-hand smoking ( OR=3.448, 95% CI: 1.271-9.352, P<0.05) were independent risk factors for the development of COPD. Conclusion:The study shows the prevalence of COPD and related risk factors in residents over the age of 40 in Shanghai Jiading town, indicating that more attention should be paid for high risk population in COPD screening.

To study the protective effect and preliminary mechanisms of asiatic acid against oxygen-glucose deprivation/reoxygenation (OGD/R) injury of PC12 cells, Na2S2O4 combined with low glucose induced damage of PC12 cells was served as OGD/R injury model in vitro. MTT method was used to evaluate cell survival. Ultraviolet spectrophotometry was performed to determine lactate dehydrogenase (LDH) leakage, lactic acid (LD) content, intracellular superoxide dismutase (SOD), malonyldialdehyde (MDA), and cellular Caspase-3 activity. Flow cytometry was applied to assay cell apoptosis. Na2S2O4 combined with low glucose induced significant cell survival rate decreasing compared with normal cells. Cell survival rate increasing, LDH leakage alleviating, LD producing inhibiting, SOD activity promotion, MDA content reducing, cell apoptotic rate decreasing and Caspase-3 activity inhibiting were observed when cells were preincubated with different concentration of asiatic acid (10, 1 and 0.1 micromol x L(-1)). Evident protective effect of asiatic acid against OGD/R injured PC12 cells was verified in our experiment, and the possible mechanisms were related to eliminating free radicals and inhibiting cell apoptosis.

AIM: To investigate the functional role of TGF-?_1 signal protein Smad2/3 in tubulointerstitial fibrosis associated with unilateral ureteral obstruction in rats. METHODS: The unilateral ureteral obstruction (UUO) model was induced by the ligation of left ureter. Rats were sacrificed at 1, 3, 7, 14, 21, and 28 days after UUO was initiated. TGF?_1 protein, phosphorylated Smad2/3 and interstitial ?-smooth muscle actin (?-SMA) expression were assayed by immunohistochemical staining. TGF-?_1 mRNA in the obstructed kidney was analyzed with in situ hybridration. HE and Masson staining were used for histological and morphometric studies of the pathological change in obstructed kidney. RESULTS: The results showed that upregulation of TGF-?_1 in tubulointerstitium of both cortex and medulla at day 3 (a 3.1 fold increase vs control, P

AIM:To investigate the expression and probable role of extracellular signal-regulated protein kinase(ERK1/2)in renal fibrosis associated with diabetic in mice.METHODS:Male homozygous C57BL/6 mice were divided at random into control group(intraperitoneally injected with citrate buffer)and diabetes group(received 5 consecutive daily intraperitoneal injections of streptozotocin at dose of 50 mg?kg-1?d-1).All mice were followed up for 16 weeks.Diabetes was confirmed by serum glucose levels exceeding 16.7 mmol/L.Mice were killed at 0,4,8,12 and 16 weeks respectively after streptozotocin injection.The kidney tissues were obtained from diabetic and control mice.Serum glucose,kidney weight/body weight(KW/BW),24 h albumin excretion rate(UAE)and the serum creatinine(Scr)were measured.The kidney tissue was used for histological and morphometric studies of glomerular size,glomerular matrix expansion(PAS),and the expression of TGF-?1,phosphorylated ERK1/2 and collagen Ⅲ by immunohistochemical staining.RESULTS:The serum level of glucose in streptozotocin-induced diabetic mice increased significantly.The kidney weight/body weight ratio,glomerular volume and glomerular matrix expansion in diabetic mice were obviously higher than those in control mice.Serum creatinine and 24 h albumin excretion rate in diabetic mice increased significantly compared with control mice.TGF-?1,phosphorylated ERK1/2 and collagen Ⅲ levels were obviously increased in the kidney of diabetic mice compared with those in control mice(P