Objective To explore the effects of the regulation of JAK/STAT signaling pathway by the therapy of astringent ulcer and muscle inducing enema on colon injury and mucosal barrier in ulcerative colitis(UC)model rats.Methods A rat model of ulcerative colitis was established using 2,4,6-trinitrobenzenesulfonic acid/ethanol method.The model was randomly divided into a normal control group(without modeling),a model group,a positive drug group(mesalazine sustained-release granules 0.42 g·kg-1),a high dose of Lianchuang Shengji Formula(enema 10.5 g·kg-1),a medium dose(enema 5.25 g·kg-1),and a low dose group(enema 2.62 g·kg-1).Compare the fecal occult blood,degree of colonic mucosal damage,and pathological changes of rats in each group,and detect the expression of JAK2,STAT3 proteins,and their phosphorylated proteins in colon tissue using Western blot method.Results The results showed that the mesalazine group,the medium and high-dose groups of Lianchuang Shengji Formula could increase the body mass of rats,reduce fecal occult blood score,improve colon damage,and achieve pathological results;The mesalazine group and the low,medium,and high dose groups of Lianchuang Shengji can downregulate the expression of p-JAK2 and p-STAT3 proteins(compared with the model group,P＜0.05),with the high-dose group being the most significant(P＜0.01).The apoptosis rate of colon tissue significantly decreased(P＜0.05).Conclusion The enema therapy of astringent ulcer and promoting muscle growth can significantly improve the pathological scores of bloody stools and colon injury in rats with ulcerative colitis.The mechanism may be related to the inhibition of JAK2 and STAT3 phosphorylation protein expression,and further inhibition of the JAK/STAT signaling pathway.

Objective To explore the effects of the regulation of JAK/STAT signaling pathway by the therapy of astringent ulcer and muscle inducing enema on colon injury and mucosal barrier in ulcerative colitis(UC)model rats.Methods A rat model of ulcerative colitis was established using 2,4,6-trinitrobenzenesulfonic acid/ethanol method.The model was randomly divided into a normal control group(without modeling),a model group,a positive drug group(mesalazine sustained-release granules 0.42 g·kg-1),a high dose of Lianchuang Shengji Formula(enema 10.5 g·kg-1),a medium dose(enema 5.25 g·kg-1),and a low dose group(enema 2.62 g·kg-1).Compare the fecal occult blood,degree of colonic mucosal damage,and pathological changes of rats in each group,and detect the expression of JAK2,STAT3 proteins,and their phosphorylated proteins in colon tissue using Western blot method.Results The results showed that the mesalazine group,the medium and high-dose groups of Lianchuang Shengji Formula could increase the body mass of rats,reduce fecal occult blood score,improve colon damage,and achieve pathological results;The mesalazine group and the low,medium,and high dose groups of Lianchuang Shengji can downregulate the expression of p-JAK2 and p-STAT3 proteins(compared with the model group,P＜0.05),with the high-dose group being the most significant(P＜0.01).The apoptosis rate of colon tissue significantly decreased(P＜0.05).Conclusion The enema therapy of astringent ulcer and promoting muscle growth can significantly improve the pathological scores of bloody stools and colon injury in rats with ulcerative colitis.The mechanism may be related to the inhibition of JAK2 and STAT3 phosphorylation protein expression,and further inhibition of the JAK/STAT signaling pathway.

Objective: To understand the present situation of physical activity and its influencing factors, and to provide a reference for improving the level of physical activity and making the intervention measures. Methods: The method of random stratification was used to select 4 740 pre school children aged 3-6 from 17 kindergartens in 12 counties and districts of Nanchang City, The questionnaire of physical activities of young children and the questionnaire of parents of physical activities of young children were applied to conduct a survey. Results: Compared with weekday PA and MVPA, preschool children’s weekends decreased, SB increased. The differences in PA, MVPA and SB on weekdays and weekends were statistically significant( P <0.01). The proportion of PA and MVPA reaching the recommended amount during the working day of preschool children were 44.9%-59.2%, 45.4%- 61.7%.The proportion reaching the recommended amount of PA and MVPA on weekends were 24.7%-27.8%, 24.5%-29.9%, and the proportion reaching the recommended amount on weekdays was higher than that on weekends. Conclusion There is still gap between actual amount of physical activity and the recommended amount. There are different modes of activity on weekdays and weekends, and weekends are the least active periods. Parents and teachers should pay enough attention to the establishment of "social campus family" model to improve the lack of physical activity of preschool children.