Objective : To investigate the effect of miR-141-3p on LPS induced A549 cell injury by targeting high mobility group protein 1 (HMGB1) ． Methods : A549 cells derived from type Ⅱ alveolar epithelial cells were taken as the study object，miR-141-3p mimics，mimics NC，HMGB1 gene overexpression plasmid (pcDNA3. 1-HMGB1) and empty Vector were transfected into A549 cells respectively or co-transfected，then 10 μg / ml LPS was used for 24 h．Cell proliferation activity was detected by cell counting kit-8 ( CCK-8) ．The activity of lactate dehydrogenase ( LDH) in the supernatant of cell culture was detected by colorimetry．The apoptosis level of each group was detec- ted by flow cytometry．The levels of interleukin (IL) -1 β , IL-6 and tumor necrosis factor α (TNF-α) were detected by enzyme-linked immunosorbent assay (Elisa) ．Dual luciferase reporter gene assay verified the targeted regulatory relationship between miR-141-3p and HMGB1 . Results : After treatment with LPS ，the proliferative activity of A549 cells and the expression level of miR-141-3p decreased ( P ＜0. 05 ) ，the apoptosis rate increased ( P < 0. 05) ，the levels of IL-1 β , IL-6，TNF-α and the activity of LDH in supernatant increased (P＜0. 05) ．Overex- pression of miR-141-3p increased the proliferation activity of A549 cells treated with LPS (P ＜0. 05 ) ，and de- creased the apoptosis rate and the levels of IL-1 β , IL-6，TNF-α in cells and LDH activity in supernatant (P < 0. 05) ．However，overexpression of HMGB1 gene could reverse the ameliorative effect of miR-141-3p on LPS-in- duced A549 cell injury．Dual luciferase reporter gene experiment confirmed that HMGB1 was the downstream target gene of miR-141-3p． Conclusion miR-141-3p can inhibit LPS-induced apoptosis，reduce the expression level of inflammatory factors，and improve the damage of A549 cells，which may be related to the targeted regulation of HMGB1 expression.

Objective To establish a genetic monitoring method for laboratory quails.Methods Quail microsatellite loci were searched in the literature,and microsatellite DNA loci suitable for quails were screened by an interspecific transfer method in closely related species,namely chickens and ducks.Quail liver DNA was extracted as a template,and the corresponding loci were screened by PCR amplification and agarose gel electrophoresis.On the basis of amplification of the selected microsatellite loci,the number of alleles,polymorphisms,and microsatellite loci combinations for quail genetic quality detection were selected and detection method were developed.Results We preliminary determined 23 microsatellite loci for genetic monitoring of closed-colony laboratory quails.Conclusions A genetic monitoring method for laboratory quails was preliminary developed.

Objective:To discuss the effect of inhibiting microRNA(miR)-193a-5p expression on pulmonary fibrosis in the rats with acute respiratory distress syndrome(ARDS),and to clarify the related mechanism.Methods:A total of 60 male SD rats were divided into sham operation group,model group,miR-193a-5p antagonist group(Antagomir group),and negative control group(Antagomir-NC group),and there were 15 rats in each group.The ARDS animal model was induced by administering 10 mg·kg-1 lipopolysaccharide(LPS)via tracheal instillation,while the rats in sham operation group received an equal volume of saline.After successful modeling,the rats in Antagomir group and Antagomir-NC group were treated with miR-193a-5p Antagomir or Antagomir-NC via tail vein injection.The arterial partial pressure of oxygen(PaO2)and oxygenation index(OI)of the rats in various groups were measured;HE staining and Masson staining were used to observe the pathology and collagen fiber deposition in lung tissue of the rats;kit was used to detect the level of hydroxyproline(Hyp)in lung tissue of the rats in various groups;enzyme-linked immunosorbent assay(ELISA)method was used to detect the levels of inflammatory factors tumor necrosis factor α(TNF-α),interleukin(IL)-1β,and IL-6 in bronchoalveolar lavage fluid(BALF)of the rats in various groups;real-time fluorescence quantitative PCR(RT-qPCR)method was used to detect the expression levels of miR-193a-5p in lung tissue of the rats in various groups;Western blotting method was used to detect the expression levels of β-catenin,Snail family transcriptional repressor 1(Snail1),and α-smooth muscle actin(α-SMA)proteins in lung tissue of the rats in various groups.Results:Compared with sham operation group,the PaO2 and OI of the rats in model group were significantly decreased(P<0.05);compared with model group,the PaO2 and OI of the rats in Antagomir group were significantly increased(P<0.05).The HE staining results showed that the lung tissue structure of the rats in sham operation group was normal,and there were no obvious inflammatory changes;compared with sham operation group,mild abnormalities in lung tissue structure,alveolar atrophy,and collapse were observed in the rats in model group and Antagomir-NC group,with a large number of lymphocytes and a small number of neutrophils infiltrating in the alveolar cavities,and widened alveolar spaces;compared with model group,the rats in Antagomir group showed a significant reduction in lymphocytes and neutrophil infiltration in the alveolar cavities and there were no obvious hyperplasia.The Masson staining results showed no obvious blue collagen fiber deposition in lung tissue of the rats in sham operation group;compared with sham operation group,significant blue collagen fiber deposition was observed in lung tissue of the rats in model group and Antagomir-NC group,with severe damage of the alveolar structure,indicating obvious pulmonary fibrosis;compared with model group,the deposition of blue-stained collagen fibers in lung tissue of the rats in Antagomir group was significantly reduced.Compared with sham operation group,the level of Hyp in lung tissue of the rats in model group was significantly increased(P<0.05);compared with model group,the level of Hyp of the rats in Antagomir group was significantly decreased(P<0.05).The ELISA results showed that compared with sham operation group,the levels of TNF-α,IL-1β,and IL-6 in BALF of the rats in model group were significantly increased(P<0.05);compared with model group,the levels of TNF-α,IL-1β,and IL-6 of the rats in Antagomir group were significantly decreased(P<0.05).The RT-qPCR results showed that compared with sham operation group,the expression level of miR-193a-5p in lung tissue of the rats in model group was significantly increased(P<0.05);compared with model group,the expression level of miR-193a-5p of the rats in Antagomir group was significantly decreased(P<0.05).The Western blotting results showed that compared with sham operation group,the expression levels of β-catenin,Snail1,and α-SMA proteins in lung tissue of the rats in model group were significantly increased(P<0.05);compared with model group,the expression levels of β-catenin,Snail1,and α-SMA proteins in lung tissue of the rats in Antagomir group were significantly decreased(P<0.05).Conclusion:Inhibition of miR-193a-5p expression can improve the lung function and alleviate the pulmonary fibrosis in the ARDS rats by reducing the inflammatory responses and downregulating the expressions of β-catenin,Snail1,and α-SMA proteins.

Objective To investigate the effect and mechanism of miR-141-3p on pulmonary fibrosis in rats with acute respiratory distress syndrome(ARDS).Methods Rats were divided into the control group,the model group,the agomir negative control group and the miR-141-3p agomir group according to random number table,with 10 rats in each group.In addition to the control group,the ARDS rat model was established by lipopolysaccharide(LPS)infusion.Rat alveolar typeⅡepithelial cells RLE-6TN cells were divided into the NC group,the LPS group,the miR-NC group,the miR-141-3p mimics group,the miR-141-3p mimics+pcDNA group and the miR-141-3p mimics+NRF2 and Kelch-like ring associated protein 1(Keap1)group.LPS cell model was established in all groups except the NC group.The mRNA expression levels of miR-141-3p and Keap1 in lung tissue and cells were detected by qPCR.Western blot assay was used to analyze lung tissue and cell epithelial cadherin(E-cadherin),neural cadherin(N-cadherin),microtubule associated protein light chain 3B(LC3B),autophagy associated gene Beclin-1,α-smooth muscle actin(α-SMA),type I collagen(Col-Ⅰ),Keap1 and nuclear factors E2 related factor 2(NRF2)and heme oxygenase 1(HO-1).HE staining and Masson staining were used to observe pathological changes of lung tissue and to estimate the area of lung tissue injury and pulmonary fibrosis.Hydroxyproline(Hyp)in lung tissue was detected by the kit.Levels of inflammatory factor interleukin-1β,tumor necrosis factor(TNF-α)and oxidative stress index malondialdehyde(MDA)and superoxide dismutase(SOD)were detected by ELISA.Dual luciferase reporting experiment was used to verify the targeting relationship between miR-141-3p and Keap1.Results The expression of miR-141-3p was down-regulated and the expression of Keap1 was up-regulated in lung tissue and cells(P＜0.05).Overexpression of miR-141-3p can reduce the degree of pathological damage and fibrosis of lung tissue in rats,Hyp content,and up-regulate expression levels of SOD,E-cadherin,LC3B,Beclin-1,NRF2 and HO-1 in lung tissue and cells,and down-regulate the expression levels of IL-1β,TNF-α,MDA,N-cadherin,α-SMA,Col-I and Keap1(P＜0.05).Overexpression of Keap1 was able to reverse the improvement effect of overexpression of miR-141-3p on alveolar epithelial cell damage in ARDS rats(P＜0.05).Double Luciferase reporter gene experiment confirmed that miR-141-3p and Keap1 may have a targeted regulatory relationship.Conclusion Overexpression of miR-141-3p may activate the Keap1-NRF2/ARE signaling pathway,activate autophagy,inhibit inflammatory response,oxidative stress,and EMT progression,and improve pulmonary fibrosis in ARDS rats.

Objective: To investigate the level and influencing factors of health literacy among the elderly in Gannan Tibetan Autonomous Prefecture, Gansu Province, so as to provide the evidence for developing the strategy to improve health literacy among the elderly. Methods: A total of 3 125 residents at ages of 60 years and older were recruited from Gannan Tibetan Autonomous Prefecture with a multistage random cluster sampling method from June to September, 2021. The level of health literacy was investigate among the elderly using the Questionnaire on the Health Literacy among Chinese Residents, and factors affecting the health literacy were identified using a multivariable logistic regression model. Results: A total of 3 125 questionnaires were allocated and 3 022 valid questionnaires were recovered, with an effective recovery rate of 96.70%. The respondents included 1 562 men (51.69%) and 1 460 women (48.31%), and had a mean age of (67.37±5.78) years. The participants included 1 234 individuals with an ethnic minority (40.83%). The overall prevalence of health literacy was 5.99% among participants, and the prevalence rates of basic healthy knowledge and attitudes, healthy lifestyles and behaviors and basic health-related skills were 13.57%, 8.97% and 7.67%, respectively. Multivariable logistic regression analysis identified Han Ethnicity (OR=2.266, 95%CI: 1.497-3.431), educational level (illiteracy/semi-illiteracy, OR=0.097, 95%CI: 0.038-0.246; primary school, OR=0.125, 95%CI: 0.051-0.303; junior high school, OR=0.276, 95%CI: 0.113-0.672; high school/vocational high school/technical secondary school, OR=0.307, 95%CI: 0.125-0.757), enterprise workers (OR=1.791, 95%CI: 1.089-2.947) and annual household income of less than 10 000 RMB (OR=0.526, 95%CI: 0.294-0.940) as factors affecting health literacy among the elderly in Gannan Tibetan Autonomous Prefecture. Conclusions The level of health literacy is low among the elderly in Gannan Tibetan Autonomous Prefecture, and ethnicity, educational level, occupation and annual household income are main factors affecting the level of health literacy among the elderly in Gannan Tibetan Autonomous Prefecture.

Objective: To investigate the influencing factors of infectious disease-specific health literacy (IDSHL) among rural residents in Dongxiang Autonomous County, and to construct a nomogram-based model for prediction of IDSHL. Methods: Totally 1 250 rural residents at ages of 15 years and older were sampled from Dongxiang Autonomous County using a stratified random sampling method. Participants' IDSHL was evaluated using the IDSHL Assessment Scale among Chinese Residents, and factors affecting the participants' IDSHL were identified using a multivariable logistic regression model. A nomogram-based model was created, and the predictive effectiveness of this model was evaluated using the receiver operating characteristic (ROC) curve, Hosmer-Lemeshow test and C-index. Results: A total of 1 223 valid respondents were enrolled, including 687 men (56.17%) and 536 women (43.83%), and the proportion of IDSHL was 48.48%. Multivariable logistic regression analysis identified age (reference: 60 years and older; 30 to <40 years: OR=4.273, 95%CI: 2.397-7.617; 40 to <50 years: OR=3.938, 95%CI: 2.238-6.928), education level (reference: illiteracy/semi-illiteracy; primary school: OR=2.140, 95%CI: 1.456-3.144; high school/vocational high school/technical secondary school: OR=2.914, 95%CI: 1.652-5.138; junior college and above: OR=4.514, 95%CI: 2.261-9.011), healthcare seeking/medications in the past 2 weeks (reference: yes; no: OR=2.025, 95%CI: 1.346-3.046), self-rated health (reference: good; generally: OR=0.603, 95%CI: 0.376-0.966; poor: OR=0.462, 95%CI: 0.284-0.751) and daily average duration spent online (reference: no internet access; <1 h: OR=1.859, 95%CI: 1.306-3.437; 1 to <2 h, OR=1.996, 95%CI: 1.344-3.380; 2 to <3 h: OR=2.132, 95%CI: 1.109-3.116; 3 h and longer: OR=2.119, 95%CI: 1.175-3.390) as factors affecting IDSHL among rural residents in Dongxiang Autonomous County. The area under the ROC curve of the model was 0.774 (95%CI: 0.741-0.807) and the model had high calibration and differentiation levels [Hosmer-Lemeshow test: χ2=13.276, P=0.103; internal model validation (bootstrapping): mean absolute error=0.019; C-index=0.764]. Conclusions Age, education level, healthcare seeking/medications in the past 2 weeks, self-rated health status and daily average duration spent online are factors affecting IDSHL among rural residents in Dongxiang Autonomous County. The nomogram model created based on these factors has a high efficiency and applicability for prediction of IDSHL among rural residents in Dongxiang Autonomous County.

Objective:To establish the patient derived xenograft (PDX) model of liver malignant tumor, analyze the related factors affecting the carcinogenesis of PDX model, and analyze the differences of biological characteristics between the primary tumor and PDX model.Methods:Fresh liver malignant tumor tissue samples were collected from the patients who received the surgery from the Tianjin First Central Hospital and the samples were inoculated subcutaneously into BALB/c-nu mice. The correlations between clinicopathological information and tumor formation rate were analyzed, and the pathological morphology and specific protein expression of PDX model and primary tumor were compared.Results:Thirty-three PDX models were successfully established from 63 cases of liver malignant tumors. The overall tumor formation rate was 52.4% (33/63), including 46.3% (25/54) of primary liver cancer and 88.9% (8/9) of liver metastasis. The main factors affecting the tumor formation rate were tumor pathological type, distant metastasis and TNM stage (all P<0.05). The pathological morphology and specific protein expression of PDX model and primary tumor were similar. Conclusion:The PDX model of liver malignant tumor was successfully constructed, and the tumor formation rate was high, and can maintain the biological characteristics of the primary tumor.

Objective To investigate the prevention effect of chlorhexidine gluconate (CHG) gel dressings combined with chlorhexidine wipe bath on femoral venous central line-associated bloodstream infections (CLABSI) in continue renal replacement therapy (CRRT). Methods A total of 593 cases of patients with femoral venous catheter who receipted CRRT were divided into the experimental group and the control group. 282 cases of patients who hospitalized in ICU from January 2016 to December 2016 were assigned into the control group and received 3M transparent dressings and whole-body warm water bathing.Those hospitalized in ICU from January 2017 to November 2017 were assigned into the experimental group including 311cases and received 3M CHG gel dressingscombined with 2％chlorhexidine wipe bathing. Incidence of CLABSI were compared between the two groups. Results 4 cases of patients occurred CLABSI in the experimental group and 12 cases occurred CLABSI in the control group, the difference between groups was statistically significant(χ2=3.900,P<0.05). In the experimental group, 311 cases were retained for 3219 catheter-days, and 282 cases in the control group were retained for 2249 catheter-days. Compared with transparent dressings and whole-body warm water bathing, chlorhexidine gluconate gel decreasescombined with 2％ chlorhexidine wipe bath could reduce the morbidity of CLABSIs from 5.3‰(12/2249) to 1.2‰(4/3219). The on onsite time of CLABSI in the experimental group was (12.5 ± 8.23) days, which in the control group was (10.50 ± 6.46) days, the differenceare not statistically significant (t=0.504,P>0.05). Conclusions CHG gel dressings combined with chlorhexidine wipe bathing would be more effective to prevent CLABSI in CRRT.

Objective To investigate the independent association of serum Fetuin-B with metabolic syndrome in obese Chinese adults.Methods Cross-sectional data on socio-demographic,lifestyle,clinical characteristics, and serum Fetuin-B were collected for 1 318 Chinese adults with central obesity.Associations of serum Fetuin-B with metabolic syndrome and insulin resistance were analyzed using multivariable Logistic regression analysis.Results A total of 820(62.2%)individuals were identified as metabolic syndrome.Subjects with metabolic syndrome showed significantly increased levels of serum Fetuin-B than those with non-metabolic syndrome[(4.18 ±1.39 vs 4.02 ± 1.35)μg/ml,P=0.043].Increased serum Fetuin-B were significantly associated with increased fasting plasma glucose and insulin levels, as well as prevalences of non-alcoholic fatty liver disease(NAFLD)and insulin resistance.After adjustment for potential confounders, serum Fetuin-B was significantly associated with increased risks of metabolic syndrome and insulin resistance(OR=1.19,95%CI 1.06-1.34,P=0.004;OR=1.15,95%CI 1.01-1.30,P=0.031 respectively).Conclusion Serum Fetuin-B level was significantly associated with NAFLD;and elevated serum Fetuin-B was significantly associated with increased risk of metabolic syndrome.

Objective To develop a system for hand function evaluation and training based on virtual reality. Methods 5DT Data Glove 5 Ultra, Visual Studio 2010 were integrated as the development environment and DirectX 9.0 as components, and the system was developed based on the MFC programming framework. Results and Conclusion The system can assess the fingers function, recognise gestures and can be used as a 3D environment for virtual training, which may guide the patients to take the training actively.