The mediating role of depression symptoms in childhood abuse and cyberbullying among college students / 中华疾病控制杂志

Objective Analyze the correlation of depression between the childhood abuse behavior and adulthood cyberbullying behavior, so as to discuss and provide evidences for preventing the cyberbullying behavior of college students. Methods A total of 4 040 college students were surveyed after multistage stratified cluster random sampling from 6 universities in Shanxi Province of China by using childhood trauma questionnaire, self-rating depression scale and cyberbullying scale. Results In the three dimensions of cyberbullying, cyber-verbal bullying behavior, identity concealing behavior and cyber-forgery fraud behavior, male students and only child students scored higher than that of female students and non-only child students (all P<0.001). There was a positive correlation between childhood abuse, adult depression and cyberbullying (all P<0.001). The mediation effect results showed that depression symptoms of college students were mediating between childhood abuse experience and cyberbullying behavior (the mediation effect result was 0.090, P<0.001), the mediation effect contributed 12.16% to the total effect, the mediation model fitting index were 2/df=39.96，RMSEA=0.101，CFI=0.948，TLI=0.924，SRMR=0.043. Conclusions Childhood abuse experience and adulthood depression are closely related to the implementation of cyberbullying behavior in college, and depression plays part of mediating role in predicting the implementation of cyberbullying behavior in college students who has childhood abuse experience.

Recent progress on the mechanism of energy metabolism of hypoxia-inducible factor 1-driven skeletal muscle adaptations to hypoxia / 解剖学报

Hypoxia-inducible factor 1 (HIF-1) is a key nuclear transcription factor that regulates the oxygen homeostasis of tissue cells and widely exists in both mammals and humans. The expression and activity of HIF-1 are tightly regulated by cellular oxygen concentration. It can regulate the biological effects of cellular energy metabolism, angiogenesis, erythropoiesis, cell survival, cell proliferation and apoptosis in the physiological and pathological hypoxicischemic condition, so that the cells can adapt to the hypoxic environment to survive, or to apoptosis. This paper reviewed the structure and function of HIF-1 and the recent progress on the study of the mechanism of energy metabolism of HIF-1 - driven skeletal muscle adaptations to hypoxia.