BACKGROUND:Previous studies have shown that bone marrow mesenchymal stem cels in the treatment of neurological diseases have achieved some success, which can promote neurological alterations; however, there is no breakthrough on gene and drug regulation. OBJECTIVE:To investigate the influence of ginsenosides-induced differentiation of bone marrow mesenchymal stem cels on nerve regeneration after traumatic brain injury. METHODS: A traumatic brain injury model was built in rats using hydraulic shock method, and then rat models were randomly divided into model group (traumatic brain injury group), bone marrow mesenchymal stem cel group, ginsenosides group (ginsenosides induced differentiation of bone marrow mesenchymal stem cels). At 2 weeks after transplantation, western blot assay was used to detect protein expression levels of nerve growth factor and brain-derived neurotrophic factor, immunohistochemistry assay used to detect the number of BrdU-positive cels. At 1, 3 days and 1, 2 weeks after transplantation, modified neurological severity scores were recorded. RESULTS AND CONCLUSION: The expression levels of nerve growth factor and brain-derived neurotrophic factor protein were significantly higher in the ginsenosides group than the bone marrow mesenchymal stem cel group and model group (P < 0.05). The number of BrdU positive nerve cels was also higher in the ginsenosides group than the bone marrow mesenchymal stem cel group and model group (P < 0.05). At 3 days and 1, 2 weeks after transplantation, the modified neurological severity scores in the ginsenosides group were lower than those in the bone marrow mesenchymal stem cel group and model group (P< 0.05). These findings indicate that ginsenoside-induced bone marrow mesenchymal stem cel transplantation can promote nerve regeneration in rats with traumatic brain injury, which has better outcomes than bone marrow mesenchymal stem cel transplantation alone.

BACKGROUND:Bone marrow mesenchymal stem cels (BMSCs) can promote nerve regeneration, but there are no better results because of the limitations of treatment methods. BMSC transplantation alone is not enough to achieve desired therapeutic effects. OBJECTIVE:To investigate the effect of fibroblast growth factor (FGF)-modified BMSC transplantation on functional recovery and expression of glial fibrilary acidic protein after traumatic brain injury. METHODS:Animal models of traumatic brain injury were established in Sprague-Dawley rats using hydraulic shock method, and then randomized into control group (traumatic brain injury group), BMSC group and FGF-BMSC group (FGF-modified BMSC group). After isolation and culture, BMSCs were modified by adenovirus vector-mediated FGF gene. Western blot assay was used to detect transfection efficiency and glial fibrilary acidic protein expression; immunohistochemical detection was used to detect distribution and number of BrdU positive cels in the brain; Longa score was used to evaluate the neurologic function of rats at 1, 3 days, 1, 2 weeks after transplantation; TUNEL assay was used to detect cel apoptosis in the brain. RESULTS AND CONCLUSION:Western blot results showed that FGF gene was successfuly transferred to the adenovirus vector, and capable of expressing in BMSCs; moreover, the glial fibrilary acidic protein expression of FGF-BMSC group was significantly higher than that in the other two groups (P < 0.05). The number of BrdU positive cels in the brain was significantly higher in the FGF-BMSC group than the other two groups (P < 0.05). Two weeks after transplantation, the Longa scores in the FGF-BMSC group were significantly lower than those in the other two groups (P < 0.05). TUNEL results showed that the number of apoptotic cels in the FGF-BMSC group was significantly lower than that in the other two groups (P < 0.05). These findings indicate that FGF-modified BMSCs transplantation is able to improve neurological damage after traumatic brain injury and promote neurological recovery, which is better than BMSC transplantation alone.

Objective To measure the financial burden incurred by hypertension to urban patients in Beijing, Nanjing and Hangzhou cities. Methods Two communities were sampled from the three cities randomly, and 300 hypertension patients were sampled randomly from hypertension control files in each community for questionnaire survey. Results Health expenditure of the families with hypertension patients accounts for 14. 4% of the family's income, and 18. 2% of the family's expenditure, a ratio far beyond the national average (10.6 %). However, the majority of them report the burden as affordable.The basic medical insurance for urban residents helps alleviate the financial burden of hypertension patients and the extent of such burden has a close bearing on the outcome of hypertension treatment and prevention. Conclusion Effective community-based blood-pressure monitoring and control system is key to reducing the financial burden of hypertension. The reimbursement policy for hypertensive patients within the basic medical insurance is expected to be further improved.

OBJECTIVETo examine the effect of post-discharge nutrition management on the growth speed of neonates after bowel surgery.

METHODSNutrition feeding guidance was carried out in 133 post-discharge infants after surgery through nutrition clinic. The growth speed was detected every month and compared with the normal standards, then the time to accelerate growth speed was evaluated.

RESULTSThe growth speed of neonates in the first postoperative month was lower than the normal standards, especially in males(weight P=0.000; length P=0.041; circumference P=0.010). While during two to three months, male infants showed acceleration in length growth speed [(4.53±1.22) cm vs. (3.1±0.4) cm, P=0.013], and female infants showed acceleration in weight [(1.51±0.76) kg vs. (0.83±0.39) kg, P=0.028] and circumference growth speed [(2.50±0.93) cm vs. (1.2±0.7) cm, P=0.021].

CONCLUSIONSScientific post-discharge nutrition management helps neonates grow faster after bowl surgery. The two to three months after operation is the key period of growth speed acceleration.

Objective: To evaluate the association of short-term fine particulate matters (PM2.5) exposure and blood pressure in children and adolescents. Methods: A total of 144 813 junior and senior middle school students who participated in the physical examination in the 2017-2018 academic year in a northern city of China, with complete record of demographic characteristics, blood pressure and no history of heart and other important organ diseases were selected as the study subjects. Data on PM2.5 and other pollutants and meteorological data were obtained from the nearest air quality and meteorological monitoring stations of each schools. A generalized linear mixed effect model was used to analyze the association between short-term exposure of PM2.5 and blood pressure. Results: The 6 day average concentration of PM2.5 (lag05) increased by 10 μg/m 3 was associated with an increase of 0.177(95%CI=0.148-0.207)mm Hg (1 mm Hg=0.133 kPa) in systolic blood pressure and 4.4%(OR=1.044, 95%CI=1.030-1.058) increase of the prevalence of high systolic blood pressure. And it was also associated with -0.021(95%CI=-0.040--0.002)mm Hg decrease in diastolic blood pressure, but had no significant correlation with the prevalence of high diastolic blood pressure. In general, a 10 μg/m 3 increase of PM2.5 was associated with 3.3% increase in the prevalence of high blood pressure (OR=1.03, 95%CI=1.02-1.05), and difference of boys and girls were found in different lagged days (P<0.05). Conclusion Short-term exposure of PM2.5 is associated with increased systolic blood pressure and prevalence of high blood pressure among children and adolescents. Attention should be paid to the prevention of short-term exposure of PM2.5 to protect the health of children and adolescents.

Objective: To analyze the relationship between short term exposure of PM 2.5 and the vital capacity of children and adolescents and the modification effect of overweight and obesity, and to provide a scientific reference for appropriate outdoor activities and strengthening prevention of air pollution. Methods: A total of 1 036 273 students who qualified in the annual health examination data of primary and secondary school students in a city from 2017 to 2018 were selected; the meteorological factors and air quality of the study area were obtained by inverse distance weighted interpolation method; the generalized linear mixed model was used to estimate the individual lag effect and average lag effect of PM 2.5 short term exposure on lung capacity with in 7 days, and to analyze the modification effect of overweight and obesity on the relationship between short term PM 2.5 exposure and vital capacity in children and adolescents. Results: From September 1, 2017 to June 30, 2018, the average PM 2.5 concentration in this city was 66.36 μg/m 3, the detection rate of overweight and obesity was 33.38%, and the average lung capacity was (2 286.72±956.77)mL. The single lag effect of PM 2.5 on vital capacity was the biggest when lag6, the average daily PM 2.5 concentration increased by 10 μg/m 3 and the decrease of vital capacity of children and adolescents by 2.81(95% CI =2.60-3.03)mL. The average lag effect of PM 2.5 on lung capacity was the largest when lag07, the average concentration of PM 2.5 sliding was significantly correlated with the decrease of lung capacity of children and adolescents by 5.82(95% CI =5.37-6.27)mL every 10 μg/m 3 increase. The prevalence of PM 2.5 short term exposure to pulmonary capacity decreased in overweight and obese children and adolescents was higher ( P ＜0.01). Conclusion The short term exposure of PM 2.5 has a significant negative correlation with the lung capacity of children and adolescents, and there is a lag effect. The decrease of the vital capacity of overweight and obese children and adolescents after PM 2.5 short term exposure is more significant.

Objective: To analyze the association between short term PM 2.5 exposure and high blood pressure in adolescents and its modification effect of overweight and obesity, and to provide a reference for the refined management of students physical health and the scientific prevention and controlling of air pollution. Methods: A total of 148 956 junior high school students and senior high school students who passed the annual physical examination data of middle school students in Beijing from 2017 to 2018 were selected; The inverse distance weighted interpolation method was used to get the meteorological elements and air quality of the research area; Linear mixed effect model was used to estimate the cumulative lag effect of short term PM 2.5 exposure on systolic and diastolic blood pressure within 7 days, and analyze the modification effect of overweight and obesity on the association between short term PM 2.5 exposure and high blood pressure in adolescents. Results: From September 1, 2017 to June 30, 2018, the average concentration of PM 2.5 was (56.53±45.85)μg/m 3; The detection rate of overweight and obesity was 34.22%, and the detection rate of high blood pressure was 8.03%. The cumulative lag effect of PM 2.5 on systolic blood pressure in overweight and obesity group was the largest at lag07, that is, the daily average concentration of PM 2.5 increased by 10 μg/m 3 was significantly correlated with higher systolic blood pressure ( OR =1.05,95% CI =1.03-1.07); the cumulative lag effect of PM 2.5 on systolic blood pressure in non overweight and obese group was the largest at lag05, that is, the daily average concentration of PM 2.5 increased by 10 μg/m 3 was significantly correlated with higher systolic blood pressure ( OR =1.04,95% CI =1.02-1.06). Short term exposure to PM 2.5 did not affect the high diastolic blood pressure in adolescents. Overweight and obese adolescents were more susceptible to high blood pressure caused by short term PM 2.5 exposure within 3 days of cumulative lag (lag01-lag03). Conclusion The short term exposure of PM 2.5 has a significant positive correlation with adolescent blood pressure, and shows a lag effect. Overweight and obese adolescents have higher blood pressure after PM 2.5 short term exposure.

Objective: To explore the relationship between one-child and low height level classification among children and adolescents, and the effects of fruits, vegetables and physical activities on this association, and to provide as cientific reference for probing into and improving the differences of their height level between one child and child with siblings. Methods: Using stratified cluster sampling method, 93 primary and secondary schools in 7 provinces and cities in China were selected for physical examination and questionnaire surveys. A total of 40 978 primary and middle school students aged 7-17 were selected. A multilevel Logistic regression model was used to analyze. Results: Univariate analysis found that being one-child was less likely to be classified as low height level(OR=0.63, 95%CI=0.58-0.67); the multilevel model also found that the probability that one-child being at low height level was still lower(OR=0.78, 95%CI=0.73-0.85), and daily vigorous-intensity physical activities ≥1 h (OR=0.92, 95%CI=0.85-0.99) and daily vegetables and fruits intake ≥5 servings (OR=0.83, 95%CI=0.75-0.92) could also reduce the probability of being at low height level. Hierarchical analysis found that when vegetables and fruits intake and physical activities time were sufficient, there was no longer a significant difference in the height level classification between one-child and child with siblings(P>0.05). Conclusion Being one-child could be a protective factor for the height level classification of children and adolescents. Adequate intake of vegetables and fruits and time of vigorous-intensity physical activities could fill the gap of height level classification between of being one-child and child with siblings. Effective behavioral intervention measures should be taken to protect the healthy growth of height among children and adolescences.