In the field of biomedicine,two-dimensional(2D)cell lines and animal models have played an im-portant role in the study of cell pathways and drug targets.However,due to species differences between humans and other animals,and the lack of hierarchy,cellular diversity,and cell-cell or cell-matrix interactions,2D cell lines could not ful-ly reflect what cells actually look like in the human body.Organoids are three-dimensional(3D)in vitro culture models de-rived from autologous tissue stem cells,which make up for the defects of 2D culture and can simulate the structure and function of real human organs to a certain extent,providing new ideas for disease diagnosis and treatment.Among them,lung organoids(LO)are a typical case studying the development process of human lung and the generation principle of lung diseases.Relevant studies have provided help for the treatment of pulmonary fibrosis,lung cancer,lung injury and other diseases.This paper aims to summarize and analyze the research progress of lung organoids in recent years,and fur-ther summarize the application of LO in the diagnosis and treatment of lung diseases.

Objective:To explore the distribution characteristics of brachial-ankle pulse wave velocity (BaPWV) in adolescents.Methods:Cross sectional survey research.A total of 1 607 adolescents aged 12-17 years from 5 middle schools in the Haidian District, Beijing from June 2020 to May 2021 were enrolled for measuring their blood pressure, weight, height and the body mass index (BMI), including 782 males and 825 females.BaPWV was measured using an arteriosclerosis detector.They were divided by the age, sex and obesity.Differences of measurement data among multiple groups were compared by one-way ANOVA, followed by the LSD test, and those between groups were compared by the two-sample t-test.The correlation between BaPWV and other indexes was assessed by the Pearson correlation analysis. Results:The median level of BaPWV in adolescents aged 12-17 years increased with age, which was 982.50 cm/s in adolescents aged 12 years, and maximum 1 113.50 cm/s those aged 17 years.BaPWV in adolescents aged 12-17 years was positively correlated with age ( r=0.936, P=0.006). Subgrouped by the sex, the median BaPWV of male and female adolescents aged 12 years was 962.25 cm/s and 997.50 cm/s, respectively, which reached 1 122.50 cm/s and 1 096.00 cm/s in those aged 17 years, respectively.BaPWV of male and female adolescents was positively correlated with the age ( r=0.903, P=0.014; r=0.945, P=0.004). In male adolescents, BaPWV was positively correlated the systolic and diastolic blood pressure, age, weight, height, BMI( r=0.308, P<0.001; r=0.289, P<0.001; r=0.478, P<0.001; r=0.190, P<0.001; r=0.315, P<0.001; r=0.109, P=0.002). In female adolescents, BaPWV also was positively correlated the systolic and diastolic blood pressure, age, weight, height, BMI( r=0.340, P<0.001; r=0.285, P<0.001; r=0.379, P<0.001; r=0.115, P=0.001; r=0.170, P=0.001; r=0.097, P=0.014). In the overall population, BaPWV was statistically significant between the obese and normal groups ( t=-3.428, P=0.001). No significant difference in BaPWV between male and female adolescents aged 12-13 years was identified ( t=0.123, P=0.902 ), but it was significantly lower in female adolescents aged 14-15 years and 16-17 years than those of age-matched males( t=2.315, P=0.021; t=2.152, P=0.032). Conclusions:The median BaPWV level in adolescents aged 12-17 years, increases with the age.Systolic blood pressure, diastolic blood pressure, body weight, BMI, age and height are positively correlated with BaPWV in adolescents.Obesity can increase the stiffness of blood vessels, which is influenced by the sex.

Objective: To investigate the relationship between physical activity (PA) and occupational stress(OS) among street office staffs of a city in china. Methods: A total of 504 street office staffs were collected by using stratified cluster sampling method from April to June in 2016, the international physical activity questionnaire(IPAQ) and job content questionnaire(JCQ) were used to survey the PA and OS. Results: In all subjects, the average score of job demand was(3.57±0.83), job decision was(2.71±0.63), social support was (2.79±0.79), demand-control ratio was (1.35±0.47) and 75.60% felt OS in self-evaluation. There were significant differences in OS between subjects with different gender, ages, job rank and job hours (P<0.01), also, there were significant differences in OS between different levels of occupational and leisure related PA (P<0.01). After controlling the potentially confounding effects, compared with low PA group, the OR values of medium-level and high-level groups of occupation-related PA were 1.38(95%CI=1.21~1.94) and 2.21(95%CI=2.06~2.67) respectively, however, the OR values of the medium-level and high-level groups of leisure-related PA were 0.89(95%CI=0.73~1.12) and 0.67(95%CI=0.38~0.96) respectively. Conclusion Street office staffs have high level of OS, and leisure-related PA may be a protective factor for occupational stress.

Objective To design bundle treatment plan in the early stage for severe human infection by avian influenza H7N9, and explore its clinical efficacy and application value. Methods Fifteen patients with severe human infection by avian influenza H7N9 in Guizhou Province from December 29th, 2016 to June 7th, 2017 were enrolled. Patients admitted from March 6th, 2017 to June 7th, 2017 served as a prospective observation period (bundle treatment group), and those from December 29th, 2016 to March 5th, 2017 were selected as a historical control period (conventional treatment group). Conventional treatment group was given conventional treatment such as isolation, anti-virus, symptomatic treatment, and traditional Chinese medicine and so on. Bundle treatment group was given bundle treatment on the basis of conventional treatment, including isolation, anti-virus, respiratory support, restrictive fluid management, immunotherapy, inhibition of inflammation, antibiotic therapy, nutritional support, prevention of hospital acquired infection (HAP), individual sedation, continuous blood purification (CBP) for acute kidney injury (AKI) and severe acute respiratory distress syndrome (ARDS) patients, and intensive care. A cluster of bundle treatment team was set up to ensure that all measures carried out smoothly. The gender, age, onset to diagnosis time, acute physiology and chronic health evaluationⅡ(APACHEⅡ) score, oxygenation index (PaO2/FiO2) at admission, the length of intensive care unit (ICU) stay, total hospitalization time and prognosis of the two groups were observed. Correlation analysis between bundle therapy and prognosis was analyzed by Spearman correlation analysis. Receiver operating characteristic (ROC) curve was drawn, and the clinical value of bundle treatment was analyzed. Results There was no significant difference in gender, age, onset to diagnosis time, APACHEⅡscore, PaO2/FiO2, the length of ICU stay, or total hospitalization time between bundle treatment group (n = 9) and conventional treatment group (n = 6), but the death patients in the bundle treatment group was significantly fewer than those in conventional treatment group (cases:2 vs. 5, χ2= 3.225, P = 0.041). Correlation analysis showed that there was a significant correlation between the mortality and whether received bundle treatment or not in patients who infected by avian influenza H7N9 (r = -0.875, P = 0.018). ROC curve analysis showed that the area under the ROC curve (AUC) of non-bundle treatment for predicting the death in patients with severe human infection by avian influenza H7N9 was 0.938, 95% confidence interval (95%CI) was 0.795-1.000, the sensitivity was 88.88%, and the specificity was 98.62%. Conclusions Early bundle therapy has a significant effect on severe human infection by avian influenza H7N9, which can improve the prognosis and reduce the mortality of patients. It is worthy for clinical application.

Objective To investigate the changes of airway resistance before and after Bronchial Diulation Test in patients with senile asthma and the effect of age on the degree of airway resistance. Methods A total of 29 (> 60 years)senile asthma patients and 21 younger(< 60 y)patients were enrolled in the study. The status of their pulmonary function was determined by MEFV(Maximum expiratory flow?volume curve)and an IOS(impulse oscillometry) system before and after Bronchial Diulation Test,The spirometric indexes such as forced vital capacity,total respiratory impedance,respiratory resistance and respiratory system reactance were collected and analyzed. Results Significant decreases of indexs were found after Bronchial Diulation Test compared with those before Bronchial Diulation Test in the study group(P<0.05,respectively). No significant difference in improvement of indexs was found between the group of patients with senile asthma(age > 60 years)and the group of healthy control(age < 60 years ). Each index of the airway resistance has a very good correlation with FEV1%,with the highest degree of relation is X5%. Conclusion The airway resistance of senile asthmatic patients was significantly improved after diuslation test and these indexes IOS would be valuable in evaluating the changes of airway resistance of senile asthma.

Objective: This study aims to evaluate the prevention effect and cost-effectiveness of a prophylactic bivalent human papilloma virus (HPV) vaccine. Methods: A multiple health status dynamic model was developed, including natural history of diseases and prevention strategies. We built 19 prevention strategies including visual inspection with acetic acid/lugol's iodine (VIA/VILI) and/or 3 does prophylactic bivalent HPV vaccine administered to adolescent girls at the age of 15 years old every year under the assumption that vaccine coverage and screening coverage were 70%. The incremental cost-effectiveness ratio (ICER), optimal price of 3 does vaccine and cost-effectiveness frontier of these strategies were analyzed compared with no-intervention. The ICER threshold is 152 087 CNY. Results: Compared with no-intervention, Routine vaccination reduced the incidence of cervical cancer by 69.5%, superior to 5 strategies including VIA/VILI screening only. The range of effect was between 9.0% and 69.2%, and the effect of strategy increased significantly with the increase of screening frequency. Combination vaccination with screening at ages of 35 reduced the incidence of cervical cancer by 72.0%, and the effect increased with the increase of screening frequency. Combination vaccination with screening every 3 years between (35-64) years old reduced the incidence by 89.4%. Compared with no-intervention, the ICER of combination vaccination with screening twice between 35 years and 64 years was 121 292 CNY/life-year, which was cost-effective. The price of vaccine had a significant impact on the ICER of the strategy; when the vaccine price was less than 600 CNY, only routine vaccination or supplementary vaccination between 16-39 years old after routine vaccination was cost-effective; when the vaccine price was less than 1 200 CNY, supplementary vaccination between 16-19 years old plus VIA/VILI was cost-effective. Conclusion Ther prevention strategy was cost-effective, which could effectively reduce the incidence of cervical cancer by implementation of HPV vaccination combined with VIA/VILI in suitable aging females.

Cervical carcinoma has brought huge burden on patients, especially in developing countries. Preventive vaccines could effectively reduce the incidence of cervical carcinoma. The high prices were one of the most difficult problem in introducing the vaccine in developing countries, so the cost-effectiveness and health financing of the vaccines should be carefully studied before incorporated into the national immunization program. Thus, researchers used mathematical models to predict the effects of HPV vaccines and to study the cost- effectiveness. In order to understand the current situation on the cost-effectiveness of HPV vaccines in the developing countries, a systematic searching of literature from PubMed, Elsevier Science Direct, Medline, ProQuest, CNKI and Wangfang Data was performed, this study aims to conduct a systematic review from aspects of project source, first author, research areas, research perspectives, prevention strategies, vaccine characteristics, cost-effectiveness.
Cost-Benefit Analysis ; Developing Countries ; Female ; Humans ; Immunization Programs ; Incidence ; Models, Theoretical ; Papillomavirus Infections ; economics ; prevention & control ; Papillomavirus Vaccines ; economics ; Uterine Cervical Neoplasms ; economics ; prevention & control

Moyamoya disease is a tare intracranial angiopathy resulting in symptoms and prognosis similar with the stroke,if not diagnosed and treated early.The article reviews the characteristics,pathogenesis,treatment and prognosis of Moyamoya disease.Clinicians should be aware of this disease in routine work,so that the patients with Moyamoya disease can be early diagnosed and treated to avoid disability or death.

Objective To explore the means of haemostasis in gallbladder preserving cholecystolithotomy. Methods The clinical data of 31 cases were retrospectively analyzed, summarizes the successful experiences. Results There appeared 31 cases the gallbladder internal bleeding in 512 cases gallbladder preserving cholecystolithotomy. In all the cases, 31 operations were stopped bleeding satisfactorily and performed successfully without conversion to conventional laparoscopic surgery, without perforation of gallbladder. pressure and lavage hemostasis had common effect, the control coagulation hemostasis had satisfaction rate 96.6%. Except one patient used gallbladder whole layers suture method. Conclusion The control coagulation hemostasis with the high-frequency electric knife is the optimal way, pressure and lavage hemostasis is basal, and gallbladder whole layers suture method is supplement.

BACKGROUND:Recent studies have found that bone marrow mesenchymal stem cels that culturedin vitro for a long time can naturaly differentiate into neural stem cels, which then differentiate into neurons and glial cels, thereby providing a new therapeutic thinking for Parkinson’s disease, sequela of cerebral infarction, cerebelar atrophy and brain dysplasia.
OBJECTIVE:To discuss the influence of neural stem cel transplantation on neurologic function of rats with cerebral hemorrhage at recovery stage and the relevant mechanism of action.
METHODS: Sixty male Sprague-Dawley rats were randomly divided into normal group (n=18), cerebral hemorrhage group (n=21) and transplantation group (n=21). Cerebral hemorrhage models were established in the latter two groups using VII type colagen enzyme induction method. At 21 days of modeling, rats in the transplantation group were injected neural stem cels via the tail vein, and those in the other two groups received the same volume of normal saline. At 7, 14, 21 days after cel transplantation, modified adhesive removal test (MST) was employed to evaluate the neurologic function of rats, and then the rats were kiled. RT-PCR was used to detect angiopoietin-1 mRNA expression in the bleeding tissues, and western blot assay was employed to measure tyrosine kinase receptor-2 protein expression.
RESULTS AND CONCLUSION:Compared with the normal group, the MST scores in the cerebral hemorrhage group and transplantation group were significantly decreased (P< 0.05). From the 7th day after transplantation, MST scores in the transplantation group were significantly higher than those in the cerebral hemorrhage group (P < 0.05). At 7, 14, 21 days after transplantation, expressions of angiopoietin-1 mRNA and tyrosine kinase receptor-2 protein were ranked as folows: transplantation group > cerebral hemorrhage group > normal group, and there was a significant difference among the three groups (P< 0.05). These findings indicate that neural stem cel transplantation can effectively promote the neurologic recovery of rats with cerebral hemorrhage at recovery stage, and the concrete mechanism may be related to the increase of angiopoietin-1 mRNA and tyrosine kinase receptor-2 protein in the bleeding tissues.