主要对0.19C-1.52Si-1.53Mn-0.14Al-0.048Nb和0.19C-1.52Si-1.48Mn-0.15Al两种成分的钢进行了Q&P(quenching and partitioning)工艺处理,并研究二次淬火对Q&P钢组织性能的影响.结果表明:Nb的加入能够起到细晶强化和沉淀强化的效...主要对0.19C-1.52Si-1.53Mn-0.14Al-0.048Nb和0.19C-1.52Si-1.48Mn-0.15Al两种成分的钢进行了Q&P(quenching and partitioning)工艺处理,并研究二次淬火对Q&P钢组织性能的影响.结果表明:Nb的加入能够起到细晶强化和沉淀强化的效果,提高Q&P钢的综合性能.强塑积最高可达到25 190 MPa.%.二次淬火能够提高实验钢最终的马氏体含量,并大大提高钢的抗拉强度和屈服强度,降低了实验钢的应变硬化指数和总延伸率.若不采用二次淬火则会使实验钢的塑性大大提高,综合力学性能较高.展开更多
Objective:To determine the potential molecular mechanisms underlying the therapeutic effect of curcumin on hepatocellular carcinoma(HCC)by network pharmacology and experimental in vitro validation.Methods:The predicti...Objective:To determine the potential molecular mechanisms underlying the therapeutic effect of curcumin on hepatocellular carcinoma(HCC)by network pharmacology and experimental in vitro validation.Methods:The predictive targets of curcumin or HCC were collected from several databases.the identified overlapping targets were crossed with Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)analyses using the Database for Annotation,Visualization,and Integrated Discovery(DAVID)platform.Two of the candidate pathways were selected to conduct an experimental verification.The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide tetrazolium(MTT)assay was used to determine the effect of curcumin on the viability of Hep G2 and LO2 cells.The apoptosis and autophagy of Hep G2 cells were respectively detected by flow cytometry and transmission electron microscopy.Besides,western blot and real-time polymerase chain reaction(PCR)were employed to verify the p53 apoptotic pathway and adenosine 5’-monophosphate(AMP)-activated protein kinase(AMPK)autophagy pathway.Hep G2 cells were pretreated with pifithrin-α(PFT-α)and GSK690693 for further investigation.Results:The 167 pathways analyzed by KEGG included apoptosis,autophagy,p53,and AMPK pathways.The GO enrichment analysis demonstrated that curcumin was involved in cellular response to drug,regulation of apoptotic pathway,and so on.The in vitro experiments also confirmed that curcumin can inhibit the growth of Hep G2 cells by promoting the apoptosis of p53 pathway and autophagy through the AMPK pathway.Furthermore,the protein and messenger RNA(m RNA)of the two pathways were downregulated in the inhibitor-pretreated group compared with the experimental group.The damage-regulated autophagy modulator(DRAM)in the PFT-α-pretreated group was downregulated,and p62 in the GSK690693-pretreated group was upregulated.Conclusions:Curcumin can treat HCC through the p53 apoptotic pathway and the AMPK/Unc-51-like kinase 1(ULK1)autophagy pathway,in which the mutual transformation of autophagy and apoptosis may occur through DRAM and p62.展开更多
文摘主要对0.19C-1.52Si-1.53Mn-0.14Al-0.048Nb和0.19C-1.52Si-1.48Mn-0.15Al两种成分的钢进行了Q&P(quenching and partitioning)工艺处理,并研究二次淬火对Q&P钢组织性能的影响.结果表明:Nb的加入能够起到细晶强化和沉淀强化的效果,提高Q&P钢的综合性能.强塑积最高可达到25 190 MPa.%.二次淬火能够提高实验钢最终的马氏体含量,并大大提高钢的抗拉强度和屈服强度,降低了实验钢的应变硬化指数和总延伸率.若不采用二次淬火则会使实验钢的塑性大大提高,综合力学性能较高.
基金supported by the General Project of Shaanxi Science and Technology Plan(No.2021JM-472)the Key Laboratory Project of Education Department of Shaanxi Province(Nos.21JS014 and 21JS007)+1 种基金the Subject Innovation Team of Shaanxi University of Chinese Medicine(No.2019YL14)the Postgraduate Student’s Innovation Project of Shaanxi University of Chinese Medicine(No.2021-09),China。
文摘Objective:To determine the potential molecular mechanisms underlying the therapeutic effect of curcumin on hepatocellular carcinoma(HCC)by network pharmacology and experimental in vitro validation.Methods:The predictive targets of curcumin or HCC were collected from several databases.the identified overlapping targets were crossed with Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)analyses using the Database for Annotation,Visualization,and Integrated Discovery(DAVID)platform.Two of the candidate pathways were selected to conduct an experimental verification.The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide tetrazolium(MTT)assay was used to determine the effect of curcumin on the viability of Hep G2 and LO2 cells.The apoptosis and autophagy of Hep G2 cells were respectively detected by flow cytometry and transmission electron microscopy.Besides,western blot and real-time polymerase chain reaction(PCR)were employed to verify the p53 apoptotic pathway and adenosine 5’-monophosphate(AMP)-activated protein kinase(AMPK)autophagy pathway.Hep G2 cells were pretreated with pifithrin-α(PFT-α)and GSK690693 for further investigation.Results:The 167 pathways analyzed by KEGG included apoptosis,autophagy,p53,and AMPK pathways.The GO enrichment analysis demonstrated that curcumin was involved in cellular response to drug,regulation of apoptotic pathway,and so on.The in vitro experiments also confirmed that curcumin can inhibit the growth of Hep G2 cells by promoting the apoptosis of p53 pathway and autophagy through the AMPK pathway.Furthermore,the protein and messenger RNA(m RNA)of the two pathways were downregulated in the inhibitor-pretreated group compared with the experimental group.The damage-regulated autophagy modulator(DRAM)in the PFT-α-pretreated group was downregulated,and p62 in the GSK690693-pretreated group was upregulated.Conclusions:Curcumin can treat HCC through the p53 apoptotic pathway and the AMPK/Unc-51-like kinase 1(ULK1)autophagy pathway,in which the mutual transformation of autophagy and apoptosis may occur through DRAM and p62.
