Naphthalene allyl trifluoromethyl benzocyclopentanone inhibits proliferation and induces apoptosis of lung cancer A549 cells in vitro / 南方医科大学学报

OBJECTIVE@#To investigate the molecular mechanism by which a novel naphthalene allyl trifluoromethyl benzocyclopentanone XX0335 inhibits the proliferation and induces apoptosis of lung cancer A549 cells.@*METHODS@#Lung cancer A549 cells were treated with 0.1% DMSO (control) or different concentrations (6.25, 12.5, and 25 μg/mL) of XX0335, and the changes in cell viability, cell cycle, proliferation and apoptosis were assessed with CCK-8 assay, EdU experiment, and flow cytometry. The effects of different concentrations of XX0335 on phosphorylation levels of proliferation-related proteins Akt, mTOR, Akt/mTOR and the expressions of cleaved PARP and cyclin D1 were determined using Western blotting. We also assessed the effect of XX0335 on tumor growth in a mouse model bearing A945 cell xenograft.@*RESULTS@#Treatment with XX0335 reduced the viability of A549 cells in a dose-dependent manner (P < 0.01) and significantly inhibited cell proliferation (P < 0.001). Flow cytometry showed that XX0335 treatment promoted apoptosis of the cells (P < 0.01) and caused an obvious increase of the number of G1-phase cells. Compared with DMSO, XX0335 significantly inhibited the phosphorylation of Akt and mTOR, increased the expression of cleaved PARP, and lowered the protein expression of cyclin D1. In the tumor-bearing mouse models, injection of XX0335 significantly decreased the tumor volume (P < 0.01).@*CONCLUSION@#XX0335 inhibits the proliferation, cycle and induces apoptosis of lung cancer A549 cells possibly by inhibiting the Akt/mTOR signal pathway.

Analysis on the Characteristics of Quality Variation of National Medical Device Supervision and Inspection in 2020 / 中国医疗器械杂志

This study is based on the summary of the characteristics of quality variation of national medical device supervision and inspection in 2020. According to the results of the national medical device supervision and inspection through comparative analysis, this study puts forward suggestions on the medical device production and supervision measures for the post-marketing products, so as to further improve the level of the medical device and ensure the safety use of medical device.

Effect of proline-spirooxindole on viability and apoptosis of non-small-cell lung cancer A549 cells / 中国病理生理杂志

AIM:To investigate the effect of proline-spirooxindole on the viability and apoptosis of human nonsmall-cell lung cancer A549 cells.METHODS:The effect of proline-spirooxindole on the viability of A549 cells was determined by CCK-8 assay.The apoptosis was analyzed by flow cytometry.The effects of proline-spirooxindole on the expression of PARP and p53 and the phosphorylation of m TOR were determined by Western blot.RESULTS:After A549 cells were treated with proline-spirooxindole (25, 50 and 100 mg/L) , the cell viability was decreased (P<0.01) compared with DMSO control group.The apoptotic rate was increased compared with DMSO control group (P<0.01).The protein expression of p53 was up-regulated, the increased apoptotic protein cleaved PARP was observed, and the phosphorylation of m TOR was inhibited (P<0.01).CONCLUSION:Proline-spirooxindole inhibits the viability of A549 cells and induces apoptosis, which may be related to the phosphorylation of m TOR.