ABSTRACT
Objective To investigate the regulatory mechanism of Paraquat (PQ)-induced epithelial-mesenchymal transition (EMT) and the protective mechanism of N-acetyl-cysteine (NAC) in PQ-induced A549 cells by EMT markers (E-cadherin and α-smooth muscle actin).Methods EMT model was established by 30 μmol/L PQ-exposed A549 cells for 4 d.The application of 10 mmol/L NAC was incubated with A549 cells for 2 h in advance.Morphological changes of A549 cells were observed under light microscope.Western blot was used to detect the expression levels of TGF-β1,E-cadherin and α-smooth muscle actin.Results In PQ-induced EMT model,the PQ group showed typical morphological changes,and the cells changed from cobblestone-like epithelial appearance to spindle-shaped mesenchymal-like appearance compared to the control group.Westem blotting showed that the protein levels of TGF-β1 and α-smooth muscle actin in the PQ group were significantly increased and the protein levels of E-cadherin were decreased in the PQ group (all P＜0.05).NAC preincubation can effectively reverse the above changes caused by PQ exposure:the protein levels of E-cadherin and α-smooth muscle actin were significantly increased and decreased,respectively and morphological changes showed more cobblestonelike epithelial appearance.Conclusion Cell experiments showed that PQ exposure can cause EMT in epithelial cells,and NAC has a protective effect in this process.Thus,it may provide new ideas and strategies for the treatment of pulmonary fibrosis caused by PQ poisoning in clinical practice.
ABSTRACT
Objective: To explore the application and clinical effects of humanistic service management in the management of NICU.Method: Humanistic service,management and education are conducted among neonate patients,their family members,nursing staff,and nursing students in NICU,and the outcome clinical effects are investigated.Result: The application of humanistic service dramatically increases the positivity,activeness,creativity,and cohesiveness of nursing staff,improves their overall quality,helps to establish a harmonious relationship between nurses,nursing students,and neonate patients' family members,enhances the satisfaction degree of neonate patients' family members and the nursing standard in NICU,and promotes the general improvement of hospital nursing service.Conclusion: The application of humanistic service in NICU initiates nursing service,improves hospital nursing standard,promotes the general development of NICU nursing,thus deserves to be further extended and applied.