To investigate the current status of sleep quality among nurses in tertiary hospitals in China, analyze the correlations of work stress and perceived organizational support with the risk of sleep problems, and further examine the mediating effect of perceived organizational support between work stress and sleep problems in nurses.

Objective To explore the mechanism of transforming growth factor-beta/p38 mitogen-activated protein kinases (TGF-β/P38MAPK) signaling pathway that transformed corallin into a transforming growth factor-beta/p38 mitogen activated protein kinases (TGF-β/P38MAPK).Methods The hair follicle stem cells (HFSCs) were divided into blank group,positive group and 10-10,10-9,10-8,10-7,10-6,10-5,10-4,10-3 mol/L mycoralin solution groups according to the random number table method.After 24 h,the cell proliferation rate was determined by MTT assay.The HFSCs were divided into blank group,positive group and low,medium and high dose groups according to the random number table method.The positive group was added with 5 mol/L of alkaline fibroblast growth factor solution,while the low,medium and high dose groups were added with 10-7,10-6 and 10-5 mol/L of mycoralin solution for intervention.The cell proliferation rate was determined by MTT assay.The protein expressions ofTGF-β,phosphorylated P38(p-p38),P38,Bax and bcl-2 in cells were detected by Western blot,and mRNA expressions of Bax and bcl-2 in cells of each group were detected by real-time quantitative PCR.Results Compared with the blank group,the productivity of the cells (0.418 ± 0.031,0.412 ± 0.014,0.468 ± 0.024 vs.0.353 ± 0.006) in the 10-7,10-6 and 10-5 mol/L aucubin groups significantly increased (P＜0.01).Compared with the blank group,the protein expression of TGF-β (0.377 ± 0.027,0.338 ± 0.021,0.322 ± 0.017 vs.0.557 ± 0.017),p-p38 (0.270 ± 0.020,0.228 ± 0.013,0.216 ± 0.012 vs.0.461 ± 0.012),Bax (0.450 ± 0.017,0.365 ± 0.011,0.279 ± 0.006 vs.0.551 ± 0.015) in the low,medium and high dose groups significantly down-regulated,while the Bcl-2 (0.450 ± 0.017,0.365 ± 0.011,0.279 ± 0.006 vs.0.358 ± 0.011) protein expression significantly increased.Compared with the blank group,the expression of Bcl-2 (1.714 ± 0.028,2.514 ± 0.054,3.382 ± 0.084 vs.1.000 ± 0) mRNA increased,Bax (0.415 ± 0.020,0.353 ± 0.090,0.235 ± 0.114 vs.1.000 ± 0) mRNA in the low,medium and high dose groups significantly down-regulated (P＜0.01).Conclusions By regulating the TGF-β/p38MAPK signaling pathway,mycoralin can reduce the expression of downstream apoptotic factors,and promote the repair of damaged skin.