PTEN的表达对宫颈癌细胞周期的影响及意义

目的通过观察PTEN在宫颈癌中的表达及构建PTEN过表达载体研究PTEN在宫颈癌发生和发展中的意义。方法首先通过免疫组织化学法检测PTEN在宫颈癌组织的表达情况,进一步在宫颈癌细胞系中用Western blot检测PTEN的表达,根据不同细胞系PTEN的表达水平的差异选取表达水平较低的C33-A细胞系进行过表达载体的转染,并筛选出高表达PTEN的单细胞克隆进行后续的细胞周期的检测及周期相关蛋白P21、P27、Cycli—nA及CyclinD1的蛋白水平检测。结果宫颈癌组织PTEN阳性率与正常宫颈上皮组织、CINⅠ～Ⅱ相比明显减少（P均〈0．05）。过表达PTEN的细胞克隆处于GO期的细胞百分数高于阳性对照（P〈0．05）,而处于S期的细胞百分数低于阳性对照（P〈0．05）。对周期相关蛋白P21、P27、CyclinA及CyclinD1的蛋白表达的检测发现P21、P27表达上调,CyclinD1表达下调。结论PTEN在宫颈癌中的表达是减少的甚至是缺失的。通过人工构建PTEN过表达载体得到PTEN过表达克隆后,高表达的PTEN对细胞周期是抑制的,其可能是通过PI3K—Akt途径调节细胞周期相关蛋白P21、P27及CyclinD1发挥了抑制细胞周期GO／S期转换的作用,进而抑制了宫颈癌细胞的增殖。     

Antiproliferative action of Xylopia aethiopica fruit extract on human cervical cancer cells

The anticancer potential of Xylopia aethiopica fruit extract (XAFE), and the mechanism of cell death it elicits, was investigated in various cell lines. Treatment with XAFE led to a dose-dependent growth inhibition in most cell lines, with selective cytotoxicity towards cancer cells and particularly the human cervical cancer cell line C-33A. In this study, apoptosis was confirmed by nuclear fragmentation and sub-G(0)/G(1) phase accumulation. The cell cycle was arrested at the G(2)/M phase with a decreased G(0)/G(1) population. A semi-quantitative gene expression study revealed dose-dependent up-regulation of p53 and p21 genes, and an increase in the Bax/Bcl-2 ratio. These results indicate that XAFE could be a potential therapeutic agent against cancer since it inhibits cell proliferation, and induces apoptosis and cell cycle arrest in C-33A cells.     

四逆汤协同壮观霉素B1诱导PTEN与SUMO1解离治疗肺癌的研究

目的从蛋白质类泛素化修饰角度解析温里剂四逆汤协同壮观霉素B1抑制肺癌细胞增殖、迁移和促进细胞凋亡的作用机制。方法实验分对照组、壮观霉素B1组、四逆汤组和联合药物组,于人非小细胞肺癌A549细胞株作用48 h后,采用Westernblotting法检测小泛素相关修饰蛋白-1(SUMO1)、10号染色体缺失磷酸酶和张力蛋白同源物基因(PTEN)、磷酸化Akt(p-AKT)和Caspase-9的蛋白表达水平;MTT实验绘制细胞增殖曲线;流式细胞术检测细胞凋亡;细胞划痕和Transwell实验检测细胞迁移和侵袭。结果壮观霉素B1和四逆汤均能够降低A549细胞共价态SUMO1和p-Akt水平,增加PTEN和活化Caspase-9的蛋白水平,抑制细胞增殖、迁移和侵袭,促进细胞凋亡,壮观霉素B1和四逆汤联合药物组对细胞的抑制作用显著强于各单独给药组。结论四逆汤能够协同壮观霉素B1诱导PTEN与SUMO1解离,进而抑制肺癌细胞增殖、转移和促进细胞凋亡。     

蝎毒多肽提取物对A549细胞增殖抑制作用机制研究

目的:观察蝎毒多肽提取物(PESV)对非小细胞肺癌细胞株A549的增殖抑制作用及可能的作用机制。方法:采用噻唑蓝(MTT)法观察不同浓度PESV对A549细胞生长与增殖的影响,下游实验将对数生长期的A549细胞分为阴性对照组、PESV低、中、高剂量组,应用流式细胞术、免疫细胞化学法、Western blot法检测PESV干预后细胞周期及VEGF,HIF-1α和PTEN蛋白表达的变化。结果:MTT结果显示,PESV在一定浓度范围内对A549细胞的增殖活性有明显抑制作用(P<0.01)。流式细胞法、免疫细胞化学法及Western blot法结果显示,PESV干预后能使A549细胞阻滞于G0/G1期,并显著下调HIF-1α,VEGF表达,上调PTEN表达。结论:PESV能够抑制A549细胞的增殖,其作用机制可能与影响血管生成因子VEGF,HIF-1α和PTEN的表达而直接抑制细胞增殖、阻滞细胞周期和抑制血管生成有关。     

连翘苷经PI3K/Akt信号通路干预肾细胞癌的机制研究

目的探讨连翘苷抑制人肾细胞腺癌786-0细胞生长、迁移及侵袭的作用机制。方法体外培养786-0细胞,在其中加入不同浓度连翘苷进行干预。MTT法检测细胞生存活力,AO/EB法检测细胞凋亡,划痕实验与Transwell实验分别考察细胞迁移、侵袭能力。Western blotting法检测细胞内PI3K、p-PI3K、Akt、p-Akt、FOXO3a、p-FOXO3a、p21、p27、Fasl、Bim、MMP-2及MMP-9蛋白表达情况。结果连翘苷可有效抑制肾癌细胞生长、促进凋亡,干扰细胞周期,上调p21、p27、Fasl及Bim表达水平,与对照组比较差异明显(P0.05、0.01);与对照组比较,不同浓度连翘苷可明显抑制肾癌细胞迁移与侵袭,减少MMP-2、MMP-9合成(P0.05、0.01);同时连翘苷能明显抑制PI3K、Akt、FOXO3a磷酸化(P0.05、0.01),且呈浓度依赖性。结论连翘苷可通过PI3K/Akt信号通路调控786-0细胞凋亡与细胞周期、抑制肾癌细胞生长;同时连翘苷经PI3K/Akt通路可有效削弱肾癌细胞迁移与侵袭能力。     

Polyphenols from Artemisia annua L Inhibit Adhesion and EMT of Highly Metastatic Breast Cancer Cells MDA‐MB‐231

Recent evidence suggests that polyphenolic compounds from plants have anti‐invasion and anti‐metastasis capabilities. The Korean annual weed, Artemisia annua L., has been used as a folk medicine for treatment of various diseases. Here, we isolated and characterized polyphenols from Korean A. annua L (pKAL). We investigated anti‐metastatic effects of pKAL on the highly metastatic MDA‐MB‐231 breast cancer cells especially focusing on cancer cell adhesion to the endothelial cell and epithelial‐mesenchymal transition (EMT). Firstly, pKAL inhibited cell viability of MDA‐MB‐231 cells in a dose‐dependent manner, but not that of human umbilical vein endothelial cells (ECs). Polyphenols from Korean A. annua L inhibited the adhesion of MDA‐MB‐231 cells to ECs through reducing vascular cell adhesion molecule‐1 expression of MDA‐MB‐231 and ECs, but not intracellular adhesion molecule‐1 at the concentrations where pKAL did not influence the cell viability of either MDA‐MB‐231 cells nor EC. Further, pKAL inhibited tumor necrosis factor‐activated MDA‐MB‐231 breast cancer cell invasion through inhibition of matrix metalloproteinase‐2 and matrix metalloproteinase‐9 and EMT. Moreover, pKAL inhibited phosphorylation of Akt, but not that of protein kinase C. These results suggest that pKAL may serve as a therapeutic agent against cancer metastasis at least in part by inhibiting the cancer cell adhesion to ECs through suppression of vascular cell adhesion molecule‐1 and invasion through suppression of EMT. Copyright © 2016 John Wiley & Sons, Ltd.     

西黄丸含药血清对SW480人结肠癌细胞迁移及侵袭的影响

目的:研究西黄丸对人结肠癌细胞SW480迁移及侵袭的影响,并初步探讨其作用机制。方法:以人结肠癌细胞SW480为研究对象,细胞划痕试验检测不同剂量西黄丸含药血清对SW480细胞迁移的影响,并Transwell侵袭实验检测西黄丸含药血清对细胞侵袭能力的改变;用Western blot的方法检测细胞外调节蛋白激酶(ERK)和p-ERK蛋白表达水平,RTq PCR法检测E-钙黏蛋白(E-cadherin),多聚腺苷二磷酸核糖聚合酶1(PARP-1)、波形蛋白(Vimentin)和转录因子Snail的mRNA水平。结果:与空白组比较,西黄丸含药血清可降低SW480细胞迁移及侵袭的能力,增加E-cadhenrin mRNA表达水平,并抑制PARP-1,Vimentin和Snail mRNA表达水平,明显降低ERK蛋白的磷酸化水平,均具有统计学意义(P0.05)。结论:西黄丸含药血清可抑制SW480细胞的体外侵袭及迁移,并影响上皮-间皮转化(EMT)相关基因E-cadherin,PARP-1,Vimentin和Snail的mRNA表达,其机制可能与ERK/MAPK信号通路有关,本研究为西黄丸抑制结肠癌转移提供了科学证据。     

Myricetin suppresses breast cancer metastasis through down‐regulating the activity of matrix metalloproteinase (MMP)‐2/9

Tumour metastasis is the major cause of breast cancer mortality. Myricetin, a natural polyphenol, is found in teas, wines, and berries. The pharmacodynamic action and molecular mechanism of myricetin on breast cancer metastasis remain unknown. Here, we investigated the effect of myricetin on MDA‐Mb‐231Br cell viability, migration, invasion, and 4T1 mouse lung metastasis mouse models. MMP‐2/9 protein expression and ST6GALNAC5 expression were analysed using western blot assays and quantitative real‐time polymerase chain reaction, respectively. Cell migration and invasion were detected by wound‐healing and Boyden transwell assays. The antimetastatic effect in vivo was evaluated by lung metastasis model. Myricetin significantly decreased the activities of MMP‐2/9 and mRNA levels of ST6GALNAC5. In addition, the migration, invasion, and adhesion were effectively inhibited in a concentration‐dependent manner. On the other hand, mice treated with myricetin exhibited smaller tumour nodules compared with the vehicle mice, with only 17.78 ± 15.41% after treatment with 50 mg/kg myricetin. In conclusion, myricetin could significantly block invasion of MDA‐Mb‐231Br cells through suppressing the protein expression of MMP‐2/9 and the expression of ST6GALNAC5, as well as lung metastasis in a mouse model, which suggests that myricetin should be developed as a potential therapeutic candidate for breast cancer.     

二氢丹参酮抑制人胃癌SGC7901细胞侵袭迁移作用及机制研究

目的研究二氢丹参酮(DHT)对人胃癌SGC7901细胞增殖、迁移和侵袭能力的影响,并探讨其作用的分子机制。方法利用不同浓度的DHT处理细胞后,MTT法检测DHT对细胞生长活力的影响,划痕实验观察DHT对细胞运动能力的影响,Transwell小室模型研究DHT对细胞迁移和侵袭的影响,q RT-PCR和Western blotting检测基质金属蛋白酶MMP2、MMP9和Hedgehog通路调控基因Gli1和HHIP的m RNA和蛋白表达水平。结果与对照组相比,DHT可显著抑制SGC7901细胞的体外增殖及迁移能力,Transwell实验表明药物处理后穿膜细胞数明显低于对照组,并且呈剂量依赖性。Western blotting和q RT-PCR实验结果表明,DHT可显著抑制SGC7901细胞中MMP9的表达,降低Gli1基因的m RNA和蛋白表达,并提高HHIP基因的表达水平。结论 DHT能够抑制SGC7901细胞的迁移和侵袭能力,其机制可能与MMP9蛋白的表达降低和Hedgehog通路活性抑制有关。     

马钱苷联合miR-3619-5p靶向迁移侵袭增强因子1对宫颈癌SiHa细胞迁移和凋亡的影响

目的 研究马钱苷联合miR-3619-5p靶向迁移侵袭增强因子1(migration and invasion enhancer 1,MIEN1)对宫颈癌SiHa细胞迁移和凋亡的影响。方法 采用qRT-PCR法检测宫颈癌SiHa、Hela、CasKi细胞和正常宫颈上皮Ect1/E6E7细胞中miR-3619-5p m RNA表达。在宫颈癌SiHa细胞中转染miR-3619-5p mimics上调miR-3619-5p的表达,给予马钱苷处理,采用CCK-8法分析细胞增殖;流式细胞术分析细胞凋亡;Transwell小室分析细胞迁移和侵袭能力的变化;Western blotting法分析剪切型半胱氨酸天冬氨酸蛋白酶-3(cleaved cystein-asparate protease-3,cleaved Caspase-3)和基质金属蛋白酶-2(matrix metalloprotease-2,MMP-2)蛋白表达。生物信息学软件预测miR-3619-5p的靶基因,利用荧光素酶报告系统鉴定二者的靶向关系。在宫颈癌SiHa细胞中共转染miR-3619-5p mimics和MIEN1过表达载体...     

黄芩苷对人肺腺癌LTEP-A2细胞的抑制作用及机制研究

目的:研究观察黄芩苷对人肺腺癌LTEP-A2细胞株体外的抑制作用及相关机制。方法:采用不同浓度的黄芩苷干预人肺腺癌LTEP-A2细胞株,用CCK-8方法检测不同时间点不同浓度的黄芩苷对肺癌细胞增殖的抑制程度,接着用细胞划痕试验和Transwell小室侵袭试验观察黄芩苷对肺癌细胞体外迁移、侵袭能力的影响;用Western blot进一步检测黄芩苷干预后肺癌细胞MMP-2、MMP-9、TGF-β的表达的变化。结果:黄芩苷能明显抑制肺癌细胞增殖;能不同程度降低肺癌细胞的迁移、侵袭、体外划痕愈合能力,呈浓度依赖性;黄芩苷能不同程度下调MMP-2、MMP-9表达,其中以高浓度效果明显,中浓度居中,低浓度作用稍弱,与空白对照组比较,组间差异有统计学意义,P0.05;对肺癌细胞TGF-β的表达没有显著影响,与对照组比较,P0.05。结论:黄芩苷能不同程度地降低肺癌增殖迁移侵袭的能力,其机制可能是通过下调MMP-2、MMP-9的表达从而对肺癌细胞的增殖、迁移、侵袭发挥抑制作用。     

Atractylenolide-1 affects glycolysis/gluconeogenesis by downregulating the expression of TPI1 and GPI to inhibit the proliferation and invasion of human triple-negative breast cancer cells

Atractylenolide-1 (AT-1) is a major octanol alkaloid isolated from Atractylodes Rhizoma and is widely used to treat various diseases. However, few reports have addressed the anticancer potential of AT-1, and the underlying molecular mechanisms of its anticancer effects are unclear. This study aimed to assess the effect of AT-1 on triple-negative breast cancer (TNBC) cell proliferation and migration and explore its potential molecular mechanisms. Cell invasion assays confirmed that the number of migrating cells decreased after AT-1 treatment. Colony formation assays showed that AT-1 treatment impaired the ability of MDA-MB-231 cells to form colonies. AT-1 inhibited the expression of p-p38, p-ERK, and p-AKT in MDA-MB-231 cells, significantly downregulated the proliferation of anti-apoptosis-related proteins CDK1, CCND1, and Bcl2, and up-regulated pro-apoptotic proteins Bak, caspase 3, and caspase 9. The gas chromatography–mass spectroscopy results showed that AT-1 downregulated the metabolism-related genes TPI1 and GPI through the glycolysis/gluconeogenesis pathway and inhibited tumor growth in vivo. AT-1 affected glycolysis/gluconeogenesis by downregulating the expression of TPI1 and GPI, inhibiting the proliferation, migration, and invasion of (TNBC) MDA-MB-231 cells and suppressing tumor growth in vivo.     

PTEN在白藜芦醇对体外直肠癌细胞生长和凋亡的影响

分析第10号染色体同源丢失性磷酸酶张力蛋白基因(phosphatase and tensin homology deleted on chromosome ten,PTEN)在直肠癌细胞系中的相对表达水平,以及白藜芦醇对直肠癌细胞增殖和凋亡的作用,并分析其可能作用机制。利用Western blot检测PTEN在人直肠癌细胞株Caco-2和SW480及人正常结肠上皮细胞株NCM460中的表达;不同浓度的白藜芦醇作用体外SW480细胞后,CCK-8法检测白藜芦醇对细胞增殖的影响;流式细胞术检测白藜芦醇对细胞凋亡的影响;Western blot检测Caspase-3,PTEN,p53以及AKT蛋白在SW480细胞中的表达水平;构建慢病毒介导特异性短发夹RNA(short hairpin RNA,shRNA)下调SW480细胞中PTEN的表达,检测下调PTEN的表达后是否影响白藜芦醇对体外直肠癌细胞的生长抑制和凋亡诱导作用。结果表明,与NCM460细胞相比较,PTEN在Caco-2和SW480中的表达量均显著下调,差异有统计学显著性(P0.001);白藜芦醇对体外直肠癌SW480细胞增殖有明显抑制作用,并诱导细胞凋亡;白藜芦醇对SW480细胞中Caspase-3,PTEN和p53蛋白的表达均有明显上调作用,而抑制磷酸化AKT的表达;shRNA PTEN可明显下调PTEN在SW480细胞中的表达,同时降低白藜芦醇对SW480细胞的增殖抑制和凋亡诱导作用。提示白藜芦醇可通过上调PTEN的表达从而调控体外直肠癌细胞增殖和凋亡。     

苦参碱上调LncRNA BDNF-AS抑制宫颈鳞癌细胞增殖的机制研究

目的探讨苦参碱抑制宫颈鳞癌细胞增殖的分子机制。方法 CCK-8法检测苦参碱对宫颈癌细胞Si Ha和C33A存活率的影响;流式细胞仪检测细胞周期;高通量测序技术检测苦参碱作用前后宫颈鳞癌细胞中差异表达的RNA。qRT-PCR和Western blotting法检测人脑源性神经营养因子(BDNF)-AS、BDNF mRNA和蛋白在宫颈鳞癌细胞及异体种植瘤组织中的表达。收集2013年3月-2016年12月河南省南阳市第二人民医院32例宫颈鳞状细胞癌组织,运用q RT-PCR法检测宫颈鳞状细胞癌组织中BDNF-AS的表达。结果苦参碱能够明显抑制宫颈鳞癌细胞的增殖。苦参碱作用前后,共筛选出924个差异表达基因。其中637个(68.9%)基因表达水平上调,287个(31.1%)基因表达水平下调。苦参碱能上调BDNF-AS基因的表达水平。q RT-PCR显示BDNF-AS的表达与宫颈鳞状细胞癌病理分化程度和临床分期之间存在负相关(P<0.05),其表达与预后相关(P=0.04)。Cox回归多因素分析发现BDNF-AS可作为宫颈鳞状细胞癌患者独立的预后因子。结论 BDNF-AS在宫颈鳞状细胞癌的发生发展中可能发挥抑癌作用,苦参碱可能通过上调BDNF-AS抑制宫颈鳞状细胞癌的增殖。     

[6]‐Gingerol enhances the cisplatin sensitivity of gastric cancer cells through inhibition of proliferation and invasion via PI3K/AKT signaling pathway

Cisplatin‐based chemotherapy is a widely used chemotherapeutic regimen for gastric cancer; however, drug resistance limits its efficacy. [6]‐Gingerol has been found to exhibit anticancer effects. Here, we aim to explore the potential of [6]‐gingerol in combination with cisplatin as a new regimen for gastric cancer. CCK‐8 assay and colony formation assay were used to determine the effect of [6]‐gingerol in combination with cisplatin on cell viability of gastric cancer cells. Flow cytometry was performed to assess cell cycle distribution. Wound‐healing assay and transwell invasion assay were conducted to examine the migration and invasion abilities. Cell cycle and invasion‐related proteins and mRNAs, as well as PI3K/AKT signaling proteins, were assessed by western blotting and quantitative real‐time polymerase chain reaction. Combination of [6]‐gingerol with cisplatin inhibited cell viability and enhanced cell cycle arrest at G1 phase compared with cisplatin alone. The combination treatment inhibited cell migration and invasion ability and decreased cyclin D1, cyclin A2, matrix metalloproteinase‐9, p‐PI3K, AKT, and p‐AKT protein expressions and increased P21 and P27 mRNA levels. Our study demonstrates that [6]‐gingerol enhances the cisplatin sensitivity of gastric cancer cells and that the mechanisms involve G1 phase arrest, migration and invasion suppression via PI3K/AKT signaling pathway.     

TKP,a serine protease extracted from Trichosanthes kirilowii,inhibits the migration and invasion of colorectal adenocarcinoma cells by targeting Wnt/β‐catenin and Hedgehog/Gli1 signalings

Trichosanthes kirilowii, which is a type of Liana from cucurbitaceous family, possesses many bioactive constituents and therefore has multifarious pharmacological functions. TKP, which is a serine protease extracted from the fruit of Trichosanthes kirilowii, has been reported to possess potential anticancer activity. However, the effects of TKP on cancer cell migration and invasion are still unknown. Here, we reported that TKP could inhibit the migration and invasion abilities of colorectal cancer cells. In addition, the mRNA, protein expression levels, and activities of migration and invasion‐related proteins MMP2 and MMP9 were decreased in TKP‐treated cells. Mechanistically, TKP treatment repressed Wnt/β‐catenin and Hedgehog/Gli1 signaling cascades. However, the addition of lithium chloride or the transfection of plasmid pcDNA3.1‐V5‐HisA‐Gli1 reversed the impacts of TKP on MMP2, MMP9, cell migration, and invasion. These results indicated that TKP suppressed the migration and invasion of colorectal cancer cells through blocking Wnt/β‐catenin and Hedgehog/Gli1 pathways‐mediated MMP2 and MMP9.     

水飞蓟素对UVB致人角质形成细胞光老化保护作用的研究

目的：对水飞蓟素中的主要成分水飞蓟宾、异水飞蓟宾、水飞蓟宁、水飞蓟亭的抗细胞光老化作用进行研究。方法：采用UVB辐射HaCaT进行造模并设置空白对照组,运用酶生化法检测水飞蓟宾、异水飞蓟宾、水飞蓟宁、水飞蓟亭对UVB辐射HaCaT后的细胞增殖及抗氧化酶的影响,确定水飞蓟素中抗HacaT细胞光老化的主要有效成分。结果：与模型组相比,水飞蓟素中的水飞蓟宾、异水飞蓟宾、水飞蓟宁、水飞蓟亭均可增强细胞的增殖活力、提高细胞中SOD的活性、降低MDA的产生和LDH的漏出量。结论：水飞蓟素中的水飞蓟宾、异水飞蓟宾、水飞蓟宁、水飞蓟亭对UVB致人角质形成细胞光老化均具有保护作用,其中水飞蓟宁和水飞蓟亭的抗光老化作用更为显著。