الملخص
Noble bimetallic nanoparticles (BNPs) exhibit strong anticancer and antibacterial activities. They are known to be stable, less toxic, environmental friendly and biocompatible nature. Due to their enhanced biological properties, they are well suits for the biomedical applications such as cancer therapy, gene therapy and drug delivery. In the current study, we examine the anticancer and antibacterial potential of bio-mediated mono and bimetallic nanoparticles. Here, aqueous Capsicum annuum leaf extract was employed as a good reducing and capping agent for producing Ag, Au monometallic, and Ag-Au bimetallic nanoparticles. The formation of C.A- Ag, Au MPNs and Ag-Au BNPs was initially confirmed by visible color change of the reaction mixture and UV-Visible spectra show the Surface Plasmon Resonance (SPR) band observed at 543 nm. Furthermore, phytofabrication, crystallinities, structural alignments, particle size and elemental composition were studied by following standard physico-chemical techniques such as FT-IR (Fourier Transform Infrared), XRD (X-Ray diffraction), HR-TEM (High resolution-Transmission Electron Microscopy), SEM-EDX (Scanning Electron Microscopy and Energy- dispersive X-Ray Spectroscopy) respectively. The results were obtained from various characterization techniques confirmed that the C.A. mediated Ag, Au MNPs and Ag-Au BNPs were spherical in shape and FCC structure with nanoscale range (10-25 nm). The BNPs exhibit strong efficacy against bacterial strains. These nanoparticles were subjected to investigate the anticancer activity against human lung cancer cells (A549 cell line) through MTT assay. The cell viability was determined by this assay. The occurrence of cell apoptosis and necrotic were quantified by using dual fluorescent staining (AO/EB) and flow cytometry analysis. However, Ag-Au bimetallic nanoparticles showed highest cytotoxic potential with low IC50 - 57.35 ± 0.05 µM values. This IC50 value is comparatively lower than, Ag, Au MNPs and C.A. aqueous leaf extract. IC50 values of C.A- Ag-Au BNPs predominantly induced the cell apoptosis, necrotic and the death of A549 cells suggested the anticancer potential of C.A. mediated Ag-Au BNPs to treat the lung cancer cells.
الملخص
@#[摘 要] 目的：探讨黏蛋白13（MUC13）在肺腺癌组织中的表达及其对A549细胞增殖、凋亡、迁移、侵袭及EMT的影响与可能的机制。方法：通过癌症基因组图谱（TCGA）和高通量基因表达（GEO）数据库分析MUC13在肺腺癌组织与正常肺组织、癌旁组织中的差异表达。qPCR法和WB法检测人肺腺癌细胞NCI-H1395、NCI-H1975、H1299、A549和人正常肺上皮细胞BEAS-2B中MUC13 mRNA和蛋白的表达水平。利用siRNA技术敲低A549细胞中MUC13表达，实验分为si-MUC13组、NC组和si-MUC13+IGF-1组。通过克隆形成实验、流式细胞术和Transwell实验分别检测敲低MUC13对A549细胞增殖、细胞周期、凋亡、迁移和侵袭的影响，WB法检测敲低MUC13对A549细胞上皮钙黏素（E-cadherin）、神经钙黏素（N-cadherin）、波形蛋白（vimentin）、EGFR、p-EGFR、PI3K、p-PI3K、AKT、p-AKT等蛋白表达的影响。结果：MUC13 mRNA和蛋白在肺腺癌组织和细胞中均呈高表达（均P<0.01），选取表达水平较高的A549细胞进行后续实验。敲低MUC13后，A549细胞的增殖能力显著降低，G0/G1期的细胞数量显著增多、G2/M期及S期的细胞数量显著减少，细胞凋亡率显著升高，细胞迁移及侵袭能力均显著降低（均P<0.01）；A549细胞中E-cadherin表达显著上调，N-cadherin、vimentin表达显著下调，p-EGFR/EGFR、p-PI3K/PI3K、p-AKT/AKT比值均显著降低（均P<0.01）；再加入IGF-1处理后，A549细胞中p-EGFR/EGFR、p-PI3K/PI3K、p-AKT/AKT比值均显著升高（均P<0.01）。结论：MUC13在肺腺癌组织和细胞中均呈高表达，其可能通过激活EGFR/PI3K/AKT信号通路促进A549细胞增殖、迁移、侵袭和EMT。
الملخص
Objective To investigate the effects of long non-coding RNA FEZ family zinc finger 1 antisense RNA 1(lncRNA FEZF1-AS1)on enhancer of zeste homolog 2(EZH2)in regulation of proliferation,migration,invasion and epithelial-mesenchymal transition(EMT)of pulmonary interstitial cells and its mechanism.Methods The A549 cells human lung adenocarcinoma cell line were divided into control group and model group[model cells were induced into lung interstitial cells after being treated with transforming growth factor β1(TGF-β1)20 ng/mL for 48 h].The protein expression of E-cadherin,N-cadherin and vimentin in each group was detected by Western blot.The expression of lncRNA FEZF1-AS1 and EZH2 in the two groups was detected by RT-qPCR.Cells in the trans-fection group were divided into si NC group,lncRNA FEZF1-AS1+OE vector group and si lncRNA FEZF1-AS1+OE EZH2 group.Cell proliferation was examined by CCK-8 method,cell migration was detected by cell scratch,and cell invasion was detected by Transwell assays.The protein expression of E-cadherin,N-cadherin,vimentin and EZH2 in each group was detected by Western blot.The direct binding effect of FEZF1-AS1 and EZH2 was deter-mined by RNA immuno-precipitation(RIP).Results Compared with the control group,the protein expression level of E-cadherin in the model group was significantly decreased(P＜0.05),and the protein expression of N-cadherin and vimentin was significantly increased(P＜0.05).Compared with the control group,the expression level of lncRNA FEZF1-AS1 and EZH2 genes was significantly increased in the model group(P＜0.05).Compared with si NC group,the proliferation,migration and invasion ability of si lncRNA FEZF1-AS1+OE vector group were decreased,the ex-pression of E-cadherin protein was increased while the expression of N-cadherin,vimentin and EZH2 was decreased(P＜0.05).Compared with si lncRNA FEZF1-AS1+OE vector group,the proliferation,invasion and migration of si lncRNA FEZF1-AS1+OE EZH2 group were increased(P＜0.05).E-cadherin expression was decreased,while N-cad-herin,vimentin and EZH2 expressions were increased(P＜0.05).RIP experiment further confirmed that lncRNA FEZF1-AS1 had direct binding effect with EZH2.Conclusions LncRNA FEZF1-AS1 can promote the proliferation,invasion,metastasis and EMT process of pulmonary fibrosis cells by regulating EZH2.
الملخص
Objective To investigate the mechanism of morin-induced autophagy in non-small cell lung cancer A549 cells based on mTOR/STAT3 signaling axis.Methods A549 cells were divided into blank group and 30,60,90,120 and 150 μg·mL-1 of morin groups.After 24,48 and 72 hours of culture,the cell proliferation activity was detected by CCK-8 method,and the cell inhibition rate was calculated.A549 cells were divided into blank group and 30,90,150 μg·mL-1 morin groups.After 14 days of culture,the cell proliferation was detected by colony formation assay.After 24 hours of culture,the cell proliferation ability was detected by BeyoClickTM EdU-488.Apoptosis was detected by flow cytometry;acridine orange staining was used to detect cell autophagy;the formation of autophagosomes was observed by transmission electron microscopy.Western Blot was used to detect the expression levels of apoptosis,autophagy and mTOR/STAT3 signaling axis-related proteins in cells.A549 cells were divided into blank group,blank group + chloroquine(10 μg·mL-1)group,morin(30,150 μg·mL-1)group,morin(30,150 μg·mL-1)+ chloroquine(10 μg·mL-1)group.After 48 hours of intervention,the cell activity was detected by CCK-8 method,and the cell survival rate was calculated.Results Compared with the blank group,the inhibition rate of A549 cells in 60,90,120,150 μ g·mL-1 of morin group was significantly increased after 24 hours of intervention(P＜0.05,P＜0.001).The inhibition rates of A549 cells in 30,60,90,120 and 150 μg·mL-1 of morin groups were significantly increased after 48 and 72 hours of intervention(P＜0.001).The number of A549 cell colonies and the number of green fluorescent proliferation positive cells in the 30,90,150 μg·mL-1 of morin groups were significantly decreased(P＜0.01,P＜0.001),the apoptosis rate was significantly increased(P＜0.01,P＜0.001),and the protein expression level of cleaved-PARP was significantly increased(P＜0.001).The protein expression levels of p-P38/P38 MAPK in A549 cells of 90 and 150 μg·mL-1 of morin groups were significantly increased(P＜0.01,P＜0.001).Different degrees of orange fluorescence appeared in A549 cells of 30,90 and 150 μg·mL-1 of morin groups,and the orange fluorescence of 90 and 150 μg·mL-1 of morin groups was significant.Autophagosomes and autolysosomes appeared in the cytoplasm of A549 cells in 150 μg·mL-1 of morin group,respectively.The protein expression of LC3-Ⅱ in A549 cells of 150 μg·mL-1 of morin group was significantly up-regulated(P＜0.05).The protein expression of Atg16L1-Ⅱ in A549 cells of 90,150 μg·mL-1 of morin group was significantly up-regulated(P＜0.001),and the protein expressions of p-mTOR/mTOR and p-STAT3/STAT3 were significantly down-regulated(P＜0.001).Compared with the morin(150 μg·mL-1)group,the survival rate of A549 cells in the morin(150 μg·mL-1)+chloroquine(10 μg·mL-1)group was significantly increased(P＜0.05).Conclusion Morin can promote the apoptosis of A549 cells and induce autophagy in A549 cells,and the mechanism may be related to mTOR/STAT3 axis.
الملخص
ObjectiveTo explore the interaction between bruceoside B and gut microbiota and the inhibitory activity of its metabolites on human lung cancer A549 cells， and to explore the value of bruceoside B in the treatment of non-small cell lung cancer（NSCLC）. MethodBruceoside B was co-incubated with the human gut microbiota under anoxic conditions in vitro， and ultra high performance liquid chromatography-quadrupole-time-of-flight mass spectrometry（UPLC-Q-TOF-MS） was used to analyze the metabolic transformation products. Cell counting kit-8（CCK-8） assay was performed to determine the effects of bruceoside B and its metabolites on the proliferation of human lung cancer A549 cells and the half inhibitory concentration（IC50） was calculated. Five healthy male rats were gavaged with bruceoside B（2 mg·kg-1） for 7 days after adaptive feeding. The feces of rats were collected before and after administration. 16S rRNA sequencing was used to assess gut microbiota. ResultBruceoside B was mainly metabolized to brusatol by human gut microbiota， the IC50 of bruceoside B and the conversion product to A549 cells were 1 755.50， 19.57 μmol·L-1， respectively， and the conversion product had a better activity at inhibiting A549 cells proliferation than bruceoside B. Additionally， The results of intestinal flora analysis showed no significant differences in α diversity and β diversity of gut microbiota after administration. In terms of species abundance， at the phylum level， bruceoside B decreased the relative abundance of Actinobacteriota and Proteobacteria， increased the relative abundance of Firmicutes， Patescibacteria and Cyanobacteria. At the genus level， bruceoside B decreased the relative abundance of Staphylococcus， Aerococcus and Psychrobacter， increased the relative abundance of Romboutsia， Lactobacillus， Clostridium sensu stricto 1， Norank-f-norank-o-Clostridia-UCG-014， Turicibacter， Allobaculum and Candidatus Saccharimonas. The results of functional prediction showed that the gut microbiota functional compositions were relatively stable. ConclusionBruceoside B can be deglycosylated by intestinal flora and converted into brusatol， with a significant increase in antitumor activity. The administration of bruceoside B will not cause significant changes in the structure and function of the intestinal flora， resulting in intestinal microecological balance disorders， and the administration appears to be beneficial to the intestinal flora of NSCLC patients.
الملخص
Objective @#To investigate the effect of miR-141-3p on LPS induced A549 cell injury by targeting high mobility group protein 1 (HMGB1) ．@*Methods @#A549 cells derived from type Ⅱ alveolar epithelial cells were taken as the study object，miR-141-3p mimics，mimics NC，HMGB1 gene overexpression plasmid (pcDNA3. 1-HMGB1) and empty Vector were transfected into A549 cells respectively or co-transfected，then 10 μg / ml LPS was used for 24 h．Cell proliferation activity was detected by cell counting kit-8 ( CCK-8) ．The activity of lactate dehydrogenase ( LDH) in the supernatant of cell culture was detected by colorimetry．The apoptosis level of each group was detec- ted by flow cytometry．The levels of interleukin (IL) -1 β , IL-6 and tumor necrosis factor α (TNF-α) were detected by enzyme-linked immunosorbent assay (Elisa) ．Dual luciferase reporter gene assay verified the targeted regulatory relationship between miR-141-3p and HMGB1 . @*Results @#After treatment with LPS ，the proliferative activity of A549 cells and the expression level of miR-141-3p decreased ( P ＜0. 05 ) ，the apoptosis rate increased ( P < 0. 05) ，the levels of IL-1 β , IL-6，TNF-α and the activity of LDH in supernatant increased (P＜0. 05) ．Overex- pression of miR-141-3p increased the proliferation activity of A549 cells treated with LPS (P ＜0. 05 ) ，and de- creased the apoptosis rate and the levels of IL-1 β , IL-6，TNF-α in cells and LDH activity in supernatant (P < 0. 05) ．However，overexpression of HMGB1 gene could reverse the ameliorative effect of miR-141-3p on LPS-in- duced A549 cell injury．Dual luciferase reporter gene experiment confirmed that HMGB1 was the downstream target gene of miR-141-3p．@*Conclusion @# miR-141-3p can inhibit LPS-induced apoptosis，reduce the expression level of inflammatory factors，and improve the damage of A549 cells，which may be related to the targeted regulation of HMGB1 expression.
الملخص
Objective @# To explore the effect of MPZL1 knockdown in A549 Taxol resistant (A549 / Tax) cells and whether it affect drug resistance and tumor cell stemness by regulating β-catenin．@*Methods @#A549 and A549 / Tax cells were treated with different concentrations of doxorubicin and paclitaxel to observe the differences in drug resist- ance between the two cells．Quantitative real-time PCR (qRT-PCR) and Western blot were used to detect the MP- ZL1 expression level in A549 and A549 / Tax cells． After knockdown or overexpression of MPZL1 in A549 / Tax cells，cells were divided into control group，small hairpin RNA negative control ( sh-NC) group，MPZL1 knock- down(sh-MPZL1) group，overexpression negative control ( OE-NC) group，MPZL1 overexpression ( OE-MPZL1) group．Cell counting kit-8 ( CCK-8 ) and clone formation assay were utilized to investigate cell proliferation and clone formation ablity．Western blot assay was used to detect the protein expression after the cells treated with Wnt / β-catenin signaling inhibitor XAV939 and activator CHIR-99201 . @*Results @# The half inhibitory concentration ( IC50 ) of doxorubicin and paclitaxel in A549 / Tax cells significantly increased compared to A549 cells(P＜0. 01) . MPZL1 presented a higher expression trend in A549 / Tax cells．The IC50 values of A549 / Tax for doxorubicin and paclitaxel were 2. 731 mg / ml and 4. 939 μg / ml after MPZL1 knockdown，compared to 4. 541 mg / ml and 13. 55 μg / ml in the NC group (P＜0. 01) ．The results of CCK-8 and clone formation assay showed that the knockdown of MPZL1 reduced the viability of cells proliferation and clonal formation ability (P＜0. 05) ．Western blot results in- dicated that the expression levels of MPZL1 protein，tumor cell stemness associated proteins ( CD44，CD133) ，β - catenin and multidrug resistance protein 1 (MDR1) ，lung resistance-related protein ( LRP) were significantly re- duced in the sh-MPZL1 group． Furthermore ，XAV939 could inhibit the expression levels of MPZL1 ，CD44， CD133，MDR1，LRP and β-catenin(P＜0. 01) ．The inhibitory effect of knockdown MPZL1 on the aforementioned proteins was significantly reversed by CHIR-99201 treatment．@*Conclusion @# MPZL1 is highly expressed in A549 / Tax cells．Knockdown MPZL1 suppresses the tumor cell stemness and proliferation，thereby reversing the drug re- sistance of doxorubicin and paclitaxel in A549 / Tax cells.
الملخص
Objective To investigate the effects of doublecortin-like kinase 1 (DCLK1) on the malignant biological behaviors, such as proliferation, migration, and invasion, of A549 cell line and their corresponding mechanisms. Methods DCLK1-overexpressing A549 cell lines were established through lentiviral infection, and DCLK1 expression was validated by using RT-PCR and Western blot analysis. Proliferation ability was assessed with CCK-8 and plate cloning assays, and migration and invasion abilities were examined with Transwell assays. The pathway regulated by DCLK1 in lung adenocarcinoma was analyzed on the basis of the TCGA lung adenocarcinoma cohort with pathway enrichment analysis and verified through Western blot analysis. Results DCLK1 overexpression in A549 cells promoted cell proliferation, migration, and invasion. The inhibition of the FAK/PI3K/AKT/mTOR signaling pathway impaired the DCLK1-mediated malignant behavior of A549 cells. Conclusion DCLK1 promotes the malignant behavior of A549 cells through the activation of the FAK/PI3K/AKT/mTOR signaling pathway.
الملخص
@#目的：探讨苍术素（ATR）通过调节受体相互作用蛋白激酶（RIPK）1/RIPK3/混合谱系激酶结构域样（MLKL）信号通路对非小细胞肺癌（NSCLC）A549细胞程序性死亡及裸鼠移植瘤生长的影响。方法：使用0~160 μmol/L的ATR处理A549细胞，MTT法检测细胞存活率以确定后续实验给药浓度。使用ATR和/或RIPK1抑制剂Nec-1（necrostatin-1）、caspase抑制剂Z-VAD-FMK处理A549细胞，验证ATR是否诱导A549细胞发生程序性坏死。将A549细胞分为对照组、ATR-L组、ATR-M组、ATR-H组（分别用0、10、20、40 μmol/L ATR处理）、ATR+Nec-1组（40 μmol/L ATR+50 μmol/L Nec-1处理），处理24 h后，采用PI单染及Hoechst33342/PI双染法检测细胞死亡情况、透射电镜观察细胞死亡形态、DCFH-DA荧光探针法检测细胞内ROS水平、JC-1染色法检测线粒体膜电位、WB法检测细胞中RIPK1/RIPK3/MLKL信号通路相关蛋白质的表达水平。构建A549细胞裸鼠移植瘤模型，用10 mg/kg ATR（溶于玉米油中）对裸鼠灌胃给药5周，观察ATR对移植瘤生长的影响，WB法检测移植瘤组织中RIPK1/RIPK3/MLKL信号通路相关蛋白质的表达水平。结果：10~160 μmol/L的ATR可显著抑制A549细胞增殖，选择10、20、40 μmol/L的ATR进行后续实验。ATR组A549细胞存活率显著低于对照组（P<0.01）和ATR+Nec-1组（P<0.01），而ATR+z-VAD组细胞存活率显著低于z-VAD组（P<0.01），说明ATR可诱导A549细胞发生程序性坏死而非凋亡。与对照组比较，ATR处理组A549细胞发生肿胀，线粒体内脊消失呈空泡化，细胞内容物向外泄漏，细胞核聚集，表现为坏死特征，ATR-L组、ATR-M组、ATR-H组A549细胞死亡率、ROS水平及p-RIPK1、p-RIPK3、p-MLKL表达水平均显著升高，线粒体膜电位显著降低（均P<0.01），且呈药物浓度依赖性；与ATR-H组比较，ATR+Nec-1组细胞死亡率、ROS及p-RIPK1、p-RIPK3、p-MLKL表达水平降低，线粒体膜电位显著升高（均P<0.01）。裸鼠移植瘤实验结果显示，与对照组比较，ATR组裸鼠移植瘤体积、移植瘤质量均降低（P<0.05，或P<0.01），而与瘤组织中p-RIPK1、p-RIPK3、p-MLKL蛋白表达水平均显著升高（均P<0.01）。结论：ATR可能通过激活RIPK1/RIPK3/MLKL信号通路诱导A549细胞发生程序性坏死，抑制A549细胞及其裸鼠移植瘤的生长。
الملخص
OBJECTIVE To investigate the synergistic effect and mechanism of curcumin （CUR） combined with zerumbone （ZER） on the biological behavior of non-small cell lung cancer （NSCLC） A549 cells. METHODS CCK-8 method and Gin’s formula were used to screen the optimal concentration combination for synergistic effect after the combination of CUR and ZER. The cells were divided into blank group， CUR group， ZER group， and CUR+ZER group. Flow cytometry was used to evaluate cell apoptosis， and clone formation experiment was used to evaluate cell proliferation ability， scratch experiment and Transwell migration experiment were used to evaluate cell migration ability， and Transwell invasion experiment was used to evaluate cell invasion ability. Western blot assay was used to detect the protein expressions of phosphorylated phosphatidylinositol-3-kinase （p- PI3K）， phosphorylated protein kinase B （p-Akt）， and vascular endothelial growth factor A （VEGF-A）. RESULTS The half inhibitory concentrations of CUR and ZER on A549 cells were approximately 16 and 12 μmol/L， respectively； the drug combination of CUR 8 μmol/L+ZER 6 μmol/L had the highest efficiency enhancement index， with the cell proliferation inhibition rate of （77.41±4.16）%， indicating the most significant synergistic effect. Compared with the CUR and ZER groups， the cell apoptosis rate in the CUR+ZER group was significantly increased （P＜0.01）， while the cell clone formation rate， cell migration rate， the number of migrating cells， the number of invading cells， and relative expression levels of p-PI3K， p-Akt， and VEGF-A proteins in the cells were significantly reduced （P＜0.05 or P＜0.01）. CONCLUSIONS The combination of CUR and ZER has a synergistic effect， significantly promoting the apoptosis of NSCLC cells， and inhibiting cell proliferation， migration， and invasion. Its potential mechanism may be closely related to the inhibition of the PI3K/Akt signaling pathway， thereby down-regulating the protein expression of VEGF-A.
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The objective of this study was to analyze the effects on cell viability, apoptosis, and cell cycle of non-small cell lung cancer (NSCLC) A549 cells after intervention with Agrimonia pilosa (AP) and investigate Agrimonia pilosa anti-tumor activity in vitro. Meanwhile, liquid chromatography mass spectrometry (LC-MS) metabolomics technology was used to analyze the changes of cellular metabolites and metabolic pathways. The results of this study will provide a theoretical and experimental basis for investigating the mechanism of the effect of Agrimonia pilosa on non-small cell lung cancer A549 cells. The results showed that the cell nucleus of A549 cells crumpled and apoptosis occurred with the increase of drug concentration. The survival rate of the cells decreased, and the inhibition rate reached 21.5% and 91.74% under the low and high dose conditions, respectively. Lactate dehydrogenase (LDH) content increased (P < 0.05). Metabolomics results showed significant differences in metabolism between groups, thirty-three distinct metabolites including LysoPC(24:0/0:0), LysoPC(17:0/0:0) and PC(O-40:5) were deduced. The pathway enrichment showed that the Agrimonia pilosa plays an anti-tumor role mainly by regulating the metabolism of glycerophosphate and purine in A549 cells, in which the effect on glycerophosphate metabolism pathway was most significant. The results of combined pharmacodynamics suggested that Agrimonia pilosa might induce apoptosis and inhibit the growth of A549 cells by regulating LysoPC(24:0/0:0), LysoPC(17:0/0:0) and PC(O-40:5) metabolites in A549 cells.
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@#[摘 要] 目的：探究miR-218-5p靶向磷酸二酯酶7A（PDE7A）调节人非小细胞肺癌（NSCLC）A549细胞糖酵解过程的机制。方法：常规培养A549细胞，用Lipo3000将miR-218-5p mimic、mimic-NC、PDE7A过表达质粒（PDE7A-oe）和PDE7A对照质粒（PDE7A-NC）转染A549细胞，记为miR-218-5p mimic组、mimic-NC组、PDE7A-oe组和PDE7A-NC组。qPCR法验证转染效率，WB法检测糖酵解关键酶蛋白的表达，葡萄糖测定法和乳酸生成测定法检测各转染组A549细胞中2脱氧葡萄糖和乳酸含量，双萤光素酶报告基因实验验证miR-218-5p与PDE7A靶向结合关系，用TCGA数据库数据分析PDE7A mRNA在肺癌组织中的表达水平。结果：在A549细胞中成功地过表达了miR-218-5p（P<0.01）。过表达miR-218-5p均能显著抑制A549细胞中PDE7A、HK2、PKM2蛋白的表达（均P<0.01）、葡萄糖摄取量和乳酸生成量（均P<0.01）。过表达PDE7A均可显著促进A549细胞中PDE7A、HK2、PKM2蛋白的表达（均P<0.01），以及葡萄糖摄取量和乳酸生成量（均P<0.01）。A549细胞中miR-218-5p可与PDE7A mRNA的3´-UTR直接结合。数据库数据分析结果显示，PDE7A mRNA在肺鳞状细胞癌组织中呈高表达（P<0.01）。结论： miR-218-5p靶向PDE7A调控A549细胞中HK2和PKM2的表达水平，进而抑制糖酵解过程，miR-218-5p/PDE7A可能是NSCLC临床诊断和治疗的潜在靶点。
الملخص
Bimetallic nanoparticles (BNPs) have gained significant attention in the field of biomedical and pharmaceutical because of its tunable size, shape, high surface to volume and enhanced biological properties. In this study, we report the ecofriendly route to produce the noble (Ag-Au) bimetallic nanoparticles using aqueous flower extract of Clitoria ternatea as a reducing and capping agent. The synthesized C.T-Ag-Au BNPs were characterized by using physicochemical techniques such as UV-visible, FTIR, XRD and SEM-EDX analysis. The UV-visible spectra reveal the formation of homogeneous bimetallic nanoparticles by the single blue-shifted peak at 541 nm of C.T-Ag-Au BNPs. The phyto fabrication of synthesized C.T-Ag-Au BNPs was analyzed using FTIR spectroscopy. XRD confirms the formation of phase pure cubic Ag-Au alloy bimetallic nanoparticles with crystallite size is 14.5 nm. The surface morphology and elemental analysis of C.T-Ag-Au BNPs were examined by using SEM-EDX analysis. The synthesized C.TAg-Au BNPs were evaluated for their cytotoxicity against A549 human lung cancer cells through standard MTT assay. From this assay, green synthesized bimetallic nanoparticles induced cell apoptosis, suggesting that the synthesized C.T-Ag-Au BNPs gave best anticancer properties against lung cancer A549 cell lines.
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OBJECTIVE@#The current study evaluated various new colchicine analogs for their anticancer activity and to study the primary mechanism of apoptosis and in vivo antitumor activity of the analogs with selective anticancer properties and minimal toxicity to normal cells.@*METHODS@#Sulforhodamine B (SRB) assay was used to screen various colchicine analogs for their in vitro cytotoxicity. The effect of N-[(7S)-1,2,3-trimethoxy-9-oxo-10-(pyrrolidine-1-yl)5,6,7,9-tetrahydrobenzo[a] heptalene-7-yl] acetamide (IIIM-067) on clonogenicity, apoptotic induction, and invasiveness of A549 cells was determined using a clonogenic assay, scratch assay, and staining with 4',6-diamidino-2-phenylindole (DAPI) and annexin V/propidium iodide. Mitochondrial membrane potential (MMP) and reactive oxygen species (ROS) levels were observed using fluorescence microscopy. Western blot analysis was used to quantify expression of proteins involved in apoptosis, cell cycle, and phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) signaling. Pharmacokinetic and in vivo efficacy studies against Ehrlich ascites carcinoma (EAC) and Ehrlich solid tumor models were conducted using Swiss albino mice.@*RESULTS@#IIIM-067 showed potent cytotoxicity and better selectivity than all other colchicine analogs screened in this study. The selective activity of IIIM-067 toward A549 cells was higher among other cancer cell lines, with a selectivity index (SI) value of 2.28. IIIM-067 demonstrated concentration- and time-dependent cytotoxicity against A549 cells with half-maximal inhibitory concentration values of 0.207, 0.150 and 0.106 μmol/L at 24, 48 and 72 h, respectively. It also had reduced toxicity to normal cells (SI > 1) than the parent compound colchicine (SI = 1). IIIM-067 reduced the clonogenic ability of A549 cells in a dose-dependent manner. IIIM-067 enhanced ROS production from 24.6% at 0.05 μmol/L to 82.1% at 0.4 μmol/L and substantially decreased the MMP (100% in control to 5.6% at 0.4 μmol/L). The annexin V-FITC assay demonstrated 78% apoptosis at 0.4 μmol/L. IIIM-067 significantly (P < 0.5) induced the expression of various intrinsic apoptotic pathway proteins, and it differentially regulated the PI3K/AKT/mTOR signaling pathway. Furthermore, IIIM-067 exhibited remarkable in vivo anticancer activity against the murine EAC model, with tumor growth inhibition (TGI) of 67.0% at a dose of 6 mg/kg (i.p.) and a reduced mortality compared to colchicine. IIIM-067 also effectively inhibited the tumor growth in the murine solid tumor model with TGI rates of 48.10%, 55.68% and 44.00% at doses of 5 mg/kg (i.p.), 6 mg/kg (i.p.) and 7 mg/kg (p.o.), respectively.@*CONCLUSION@#IIIM-067 exhibited significant anticancer activity with reduced toxicity both in vitro and in vivo and is a promising anticancer candidate. However, further studies are required in clinical settings to fully understand its potential.
الموضوعات
Animals , Mice , Proto-Oncogene Proteins c-akt/metabolism , Antineoplastic Agents, Phytogenic/pharmacology , Phosphatidylinositol 3-Kinases/metabolism , Reactive Oxygen Species/metabolism , TOR Serine-Threonine Kinases/metabolism , Colchicine/pharmacology , Apoptosis , Cell Line, Tumor , Cell Proliferation , Mammals/metabolismالملخص
@#[摘 要] 目的：探讨山柰酚诱导人非小细胞肺癌（NSCLC）NCI-H1650细胞发生自噬及其机制。方法：常规培养NCI-H1650细胞，用不同浓度山柰酚处理细胞，用CCK-8法、MTT法以及EdU法检测山柰酚对NCI-H1650细胞增殖能力的影响，用自噬双标记腺病毒mCherry-EGFR-LC3感染实验检测山柰酚对NCI-H1650细胞发生自噬的影响，用WB法检测山柰酚处理后NCI-H1650细胞中自噬相关蛋白及Met/PI3K/Akt/mTOR信号通路相关蛋白的表达，用qPCR法检测山柰酚处理后NCI-H1650细胞中Met mRNA的表达。采用荧光素酶标记A549-luc细胞建立裸鼠移植瘤模型后用山柰酚进行处理，用活体动物成像技术观察移植瘤生长情况，用WB法检测移植瘤组织中自噬相关蛋白以及Met/PI3K/Akt/mTOR信号通路相关蛋白的表达。结果：山柰酚能显著抑制NCI-H1650细胞的增殖能力（P<0.05），山柰酚处理后NCI-H1650细胞内的自噬小体数量明显增加（P<0.05）、自噬标志蛋白LC3B和beclin1表达均明显上调（均P<0.05）、P62表达明显下调（P<0.05），山柰酚可明显抑制NCI-H1650细胞中Met mRNA和蛋白的表达（均P<0.05）、抑制p-PI3K p85、PI3K p85、p-Akt和p-mTOR蛋白表达（均P<0.05）。山柰酚抑制A549细胞裸鼠移植瘤的生长（P<0.05）和影响其体内自噬、Met/PI3K/Akt/mTOR通路相关蛋白的表达（均P<0.05）。结论：山柰酚通过影响Met/PI3K/Akt/mTOR通路诱导NSCLC NCI-H1650细胞发生自噬，进而抑制其增殖能力。
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@#[摘 要] 目的：明确康莱特注射液（KLTi）通过调控胆固醇代谢对肺腺癌A549细胞恶性生物学行为的抑制作用。方法：构建A549细胞体外培养模型，设置空白对照组（CON组）、KLTi组、顺铂（DDP）组及KLTi+DDP组，分别给予对应药物干预，采用CCK-8法检测不同分组的药物干预对A549细胞增殖的影响，并确定IC50值用于后续实验；使用细胞划痕实验、平板克隆形成实验、Transwell侵袭实验观察不同分组药物对A549细胞恶性生物学行为的影响；流式细胞术检测不同分组药物对A549细胞晚期凋亡水平的影响；WB法检测各组细胞上皮间质转化（EMT）相关蛋白表达，ELISA法检测促炎因子释放水平。采用比色法检测细胞胆固醇含量水平的组间差异，借助WB法检测胆固醇代谢相关膜通道蛋白ATP结合盒转运蛋白A1（ABCA1）及功能蛋白ATP柠檬酸裂解酶（ACLY）、肽基脯氨酰异构酶B（PPIB）表达水平差异。结果：KLTi及DDP对A549细胞抑制作用具有时间及剂量依赖性（均P<0.05），最终选择2 mg/mL KLTi、3 μg/mL DDP作为干预剂量，按分组加药干预48 h后显示，KLTi单用或联合DDP均可抑制A549细胞克隆形成、迁移、侵袭能力且促进其晚期凋亡，KLTi+DDP组的效果更加明显（P<0.05或P<0.01）； KLTi单用或联合DDP可通过调控E-cadherin、vimentin、snail蛋白表达从而影响A549细胞EMT进程（P<0.05或P<0.01），同时下调IL-6及IL-8的释放水平（P<0.05或P<0.01）。KLTi单用及联合DDP均可以明显降低A549细胞胆固醇含量（P<0.05或P<0.01），并且对ABCA1、ACLY、PPIB表达具有调控作用，联合组的效果更加明显（P<0.05或P<0.01）。结论：KLTi可能通过调控胆固醇代谢水平及相关通道蛋白抑制肺腺癌A549细胞增殖、迁移、侵袭等恶性生物学行为及EMT进程。
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ObjectiveTo investigate the effect of Stemona tuberosa alkaloids （STA） on apoptosis and phosphatidylinositol 3-kinase/protein kinase B （PI3K/Akt） and c-Jun N-terminal kinase/p38 mitogen-activated protein kinase （JNK/p38 MAPK） signaling pathways in human lung cancer A549 cells. MethodA549 cells were classified into blank group and STA groups （100， 150， 200， 250， 300 mg⋅L-1）. Thiazole blue （MTT） assay and colony formation assay were used to evaluate the proliferation of A549 cells. Apoptosis was observed based on Hoechst 33258 staining， flow cytometry， and Annexin V-FITC/PI staining. Western blot was employed to detect the expression of apoptosis-related proteins cysteine-aspartic acid protease-3 （Caspase-3）， B-cell lymphoma-2 （Bcl-2）-associated X protein （Bax）， and Bcl-2， and the expression of PI3K， phosphorylated （p）-PI3K， Akt， p-Akt， JNK， p-JNK， p38 MAPK， and p-p38 MAPK. ResultCompared with the blank group， STA groups （150， 200， 250， 300 mg⋅L-1） demonstrated the increase in inhibition rate of cell proliferation （P<0.01） and cell clone inhibition rate， and decrease in cell clone formation rate （P<0.01）. In comparison with the blank group， STA groups showed typical characteristics of apoptosis， such as chromatin condensation and enhanced fluorescence reaction. The apoptosis rate of STA groups was significantly higher than that of the blank group （P<0.01）. Compared with the blank group， STA （150， 200， 250， 300 mg⋅L-1） significantly up-regulated the protein expression of Caspase-3 and Bax （P<0.05， P<0.01） and down-regulated the expression of Bcl-2 protein （P<0.01）. Compared with the blank group， STA had no significant influence on the total protein expression of PI3K， Akt， JNK， and p38 MAPK. However， STA （150， 200， 250， 300 mg⋅L-1） significantly decreased the levels of p-PI3K and p-Akt （P<0.05， P<0.01） and increased the level of p-p38 MAPK （P<0.05， P<0.01）. Compared with the blank group， STA （200， 250， 300 mg⋅L-1） significantly raised the level of p-JNK （P<0.05， P<0.01）. ConclusionSTA can inhibit the proliferation and induce the apoptosis of A549 cells by inhibiting PI3K/Akt signaling pathway and activating JNK/p38 MAPK signaling pathway.
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Objective:To study the expression of Toll like receptor 3 (TLR3) in human adenocarcinoma of the lung cells induced by respiratory syncytial virus (RSV) and its significance in the diagnosis of pneumonia in children.Methods:A549 cells were divided into RSV infection group [added 1 μg/ml Lipopolysaccharide (TLR3 agonist) transfected RSV virus after 150 μl intervention], Lipopolysaccharide stimulation group (added 1 μg/ml Lipopolysaccharide 150 μl intervention) and normal control group (normal culture). The mRNA expressions of tumor necrosis factor-α, interleukin 8, TLR3 protein and TLR3 in A549 Cells of different groups were compared. We prospectively selected 80 children with RSV infectious pneumonia admitted to Baoding Second Central Hospital from August 2019 to October 2021 as the RSV pneumonia group, and sixty children with common pneumonia were taken as the common pneumonia group, and 60 healthy children in our hospital were taken as the control group. The mRNA expression of serum TLR3 in different groups was compared, and the diagnostic efficacy of serum TLR3 in RSV pneumonia was evaluated by receiver operating characteristic.Results:There was a statistically significant difference in the expression of TLR3 protein among different groups of A549 cells ( P<0.001). The expression differences of TLR3 mRNA in different groups of A549 cells at different time points were statistically significant(all P<0.001). There was significant difference in the expression of tumor necrosis factor-α and interleukin 8 of A549 cells at different time points in different groups (all P<0.05). There was a statistically significant difference in the expression of serum TLR3 mRNA among the three groups of subjects ( F=155.237, P<0.001). The critical value for TLR3 gene diagnosis was 66.87, with corresponding sensitivity of 73.75%, specificity of 70.83%, and the area under curve (AUC) of 0.803(95% CI: 0.753-0.855). Conclusions:Respiratory syncytial virus induces human lung cancer cells and promotes disease progression through TLR3 expression; Serum TLR3 can be used for the diagnosis of RSV pneumonia.
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Aim To investigate the effect of phillygenin ( PHI) on lipopolysacchride ( LPS) and normal human plasma ( NHP) induced inflammatory injury on alveolar type II epithelial A549 cells and the related mechanism. Methods A549 cells were exposured to 1 mg • L
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@#Introduction: The most common variety of lung cancer is non–small cell lung cancer (NSCLC) accounting for 84% of new cases. Surgery, chemotherapy and radiation are the primary treatment option. Metformin has recently been demonstrated to have an anti-tumour impact on various cancer cells. The goal of this investigation was to determine the growth inhibitory, antiproliferative, cytotoxic, apoptotic and cell cycle arrest properties of metformin HCl oral tablets on the A549 lung carcinoma cell line. Methods: The cells were treated with different dosages of an oral preparation of metformin, with untreated cells used as a control. The Trypan Blue Exclusion Assay was used to determine metformin’s inhibitory and cytotoxic effects. Flow cytometry was used to evaluate apoptosis and cell cycle arrest. Results: In a dose-dependent manner, metformin HCl was able to reduce the viability of treated cells compared to the untreated control. Cell proliferation was considerably inhibited in the treated group with the IC50 dose than in the untreated control group and the IC50 dose showed no cytotoxic effect on L929 cells. Induction of apoptosis and cell cycle arrest was observed in the IC50 dose-treated group by Flow cytometry analysis and data showed metformin oral drug causes early apoptosis and a considerable cell increase in the S phase of the cell cycle. Conclusion: Metformin inhibits cell growth and induces apoptosis and cell cycle arrest in the cell line. A comprehensive proteome examination is required to understand more about the mechanism of action of the oral metformin HCl on cancer cells