Objective To investigate the effect of tetramethylpyrazine pretreatment on the expression of cfos and heat shock protein (HSP70) during hypoxia-reoxygenation (H/R) in cultured fetal rat hippocampal neurons. Methods After the neurons were cultured and identified, they were randomly divided into 5 groups ( n = 24each): control group (group C), H/R group, and low, median and high concentration of tetramethylpyrazine pretreatment groups (group L, M and H). The neurons were exposed to 2 h of hypoxia followed by 24 h of reoxygenation. Tetramethylpyrazine was added with the final concentrations of 60, 200 and 800 μg/ml in group L, M and H respectively, and then the neurons were incubated for 1 h before H/R. The apoptosis rate, cell viability and expression of c-fos and HSP70 were detected. Results The cell viability was significantly lower, while the apoptosis rate was significantly higher in group A/R, L and H than in group C (P ＜0.01). The cell viability and HSP70expression were significantly higher, while the apoptosis rate and c-fos expression were significantly lower in group L, M and H than in group A/R, and in group M and H than in group L (P＜ 0.05). The cell viability and HSP70expression were significantly lower, while the apoptosis rate and c-fos expression were significantly higher in group H than in group M ( P ＜ 0.01 ).Conclusion The mechanism by which tetramethylpyrazine pretreatment inhibits the apoptosis in cultured fetal rat hippocampal neurons during H/R may be related to the dowm-regulation of c-fos expression and up-regulation of HSP70 expression.

Objective:To analyze the epidemiological trends and population characteristics of inflammatory bowel disease(IBD)in China by searching keywords related to IBD through Google Trends, Baidu index, and WeChat index, so as to provide a reference for national epidemiological studies on IBD.Methods:IBD-related hot words such as "inflammatory bowel disease" , "Crohn′s disease" , "ulcerative colitis" , "gastroesophageal reflux disease (GERD)" , "irritable bowel syndrome (IBS)" and " Helicobacter pylori ( H. pylori)" were selected. The search volume and trends of the above keywords in the world and China were analyzed through Google Trends, Baidu index and WeChat index. The epidemiological characteristics of IBD in China were summarized. Descriptive methods were used for statistical analysis. Results:The results of Google Trends analysis showed that among 5 common digestive diseases (GERD, IBS, H. pylori infection, IBD and peptic ulcer), GERD was the most concerned disease, while IBD was not the focus among the common digestive diseases. When the global searching scope was limited to IBD related hot words, Crohn′s disease was the disease of primary concern among IBD-related diseases. In South America, South Asia, and parts of Africa, ulcerative colitis was mainly concerned, and in China and countries of Southeast Asia, IBD was more concerned. The searching results of Baidu index indicated that among the national search for IBD-related hot words, the 3 keywords of "inflammatory bowel disease" , "ulcerative colitis" and "Crohn′s disease" were all highly searched, the overall daily average of the search indexes of the 3 keywords were 325, 1 320 and 2 559, respectively, and the searching volume of "Crohn′s disease" was higher than "inflammatory bowel disease" and "ulcerative colitis" . The national wide trends of search volume for "inflammatory bowel disease" , "ulcerative colitis" and "Crohn′s disease" were similar, the search heat gradually decreased from the east coast to the northwest of China, which basically coincided with the three-level ladder trend of China′s economic development, suggesting that the level of economic development was related to the incidence of IBD. The results of Baidu index analysis showed that the main populations who searched IBD-related keywords were young adults and women aged from 20 to 39 years old. The results of WeChat index analysis revealed that the searching volume of "inflammatory bowel disease" , "ulcerative colitis" and "Crohn′s disease" were 205 000, 195 000 and 120 000, respectively, and the search volume for " inflammatory bowel disease" was the highest. The official account (90.27%) and the video account (7.43%) occupied the main sources of IBD-related information on mobile terminals. Conclusions:The IBD-associated internet activities reveal a global lack of public awareness of IBD. China also faces the same problem. The search trend is consistent with the epidemiology of IBD, which may be helpful for future epidemiological research of IBD in China. Mobile media will be a potential force in promoting the patient education and disease management of IBD in China.

Objective:To explore the effects of interpregnancy interval (IPI) on pregnancy outcomes of subsequent pregnancy.Methods:A multicenter retrospective study was conducted in 21 hospitals in China. Information of age, height, pre-pregnancy weight, IPI, history of diseases, complications of pregnancy, gestational age of delivery, delivery mode, and pregnancy outcomes of the participants were collected by consulting medical records of pregnant women who had two consecutive deliveries in the same hospital during 2011 to 2018. The participants were divided into 4 groups according to IPI:<18 months, 18-23 months, 24-59 months and ≥60 months. According to the WHO′s recommendation, with the IPI of 24-59 months group as a reference, to the effects of IPI on pregnancy outcomes of subsequent pregnancy were analyzed. Stratified analysis was further carried out based on age, history of gestational diabetes mellitus (GDM), macrosomia, and premature delivery, to explore the differences in the effects of IPI on pregnancy outcomes among women with different characteristics.Results:A total of 8 026 women were included in this study. There were 423, 623, 5 512 and 1 468 participants in <18 months group, 18-23 months group, 24-59 months group and ≥60 months group, respectively. (1) The age, pre-pregnancy body mass index (BMI), history of cesarean section, GDM, gestational hypertension and cesarean section delivery rate of <18 months group, 18-23 months group, 24-59 months group and ≥60 months group were gradually increased, and the differences were statistically significant ( P<0.05). (2) After adjusting for potential confounding factors, compared with women in the IPI of 24-59 months group, the risk of premature delivery, premature rupture of membranes, and oligohydramnios were increased by 42% ( OR=1.42, 95% CI: 1.07-1.88, P=0.015), 46% ( OR=1.46, 95% CI: 1.13-1.88, P=0.004), and 64% ( OR=1.64, 95% CI: 1.13-2.38, P=0.009) respectively for women in the IPI≥60 months group. No effects of IPI on other pregnancy outcomes were found in this study ( P>0.05). (3) After stratified by age and adjusted for confounding factors, compared with women in the IPI of 24-59 months group, IPI≥60 months would significantly increase the risk of oligohydramnios for women with advanced age ( OR=2.87, 95% CI: 1.41-5.83, P=0.004); and <18 months could increase the risk of premature rupture of membranes for women under the age of 35 ( OR=1.59, 95% CI: 1.04-2.43, P=0.032). Both the risk of premature rupture of membranes ( OR=1.58, 95% CI: 1.18-2.13, P=0.002) and premature delivery ( OR=1.52, 95% CI: 1.07-2.17, P=0.020) were significantly increased in the IPI≥60 months group. After stratified by history of GDM and adjusted for confounding factors, compared with women in the IPI of 24-59 months group, IPI≥60 months would lead to an increased risk of postpartum hemorrhage for women with a history of GDM ( OR=5.34, 95% CI: 1.45-19.70, P=0.012) and an increased risk of premature rupture of membranes for women without a history of GDM ( OR=1.44, 95% CI: 1.10-1.90, P=0.009). After stratified by history of macrosomia and adjusted for confounding factors, compared with women in the IPI of 24-59 months group, IPI≥60 months could increase the proportion of cesarean section for women with a history of macrosomia ( OR=4.11, 95% CI: 1.18-14.27, P=0.026) and the risk of premature rupture of membranes for women without a history of macrosomia ( OR=1.46, 95% CI: 1.12-1.89, P=0.005). After stratified by history of premature delivery and adjusted for confounding factors, compared with women in the IPI of 24-59 months group, IPI≥60 months would significantly increase the risk of premature rupture of membranes for women without a history of premature delivery ( OR=1.47, 95% CI: 1.13-1.92, P=0.004). Conclusions:Both IPI≥60 months and <18 months would increase the risk of adverse pregnancy outcomes in the subsequent pregnancy. Healthcare education and consultation should be conducted for women of reproductive age to maintain an appropriate IPI when they plan to pregnant again, to reduce the risk of adverse pregnancy outcomes in the subsequent pregnancy.