Retinoic acid aliphatic amide inhibits the AMPK-HIF-1α pathway in human ovarian cancer

Ovarian carcinoma the commonly observed gynecological cancers has a high mortality rate. In the present study effect of retinoic acid aliphatic amide (RACA) in ovarian cancer cells was investigated using proliferation, migration and invasion assays. Western blot was used to examine the Bcl-2, cleaved caspase 3, p-ERK, MMP-2, p-FAK, P-P38, p-AMPKα and HIF-1α protein expression. CoCl₂ was used to induce HIF-1α expression in SKOV3ip. 1 and HEY-A8 cells. The results revealed that RACA treatment prompted cell proliferation, invasion and migration but inhibited apoptosis of SKOV3ip. 1 and HEY-A8 cells. RACA treatment also induced upregulation of Bcl-2 and MMP-2, activation of p-P38, p-ERK and p-FAK, inhibition of cleaved caspase 3. RACA treatment also caused upregulatation of HIF-1α in ovarian cells with the activation of p-AMPKα. Upregulation of HIF-1α expression in CoCl₂-treated cancer cells resulted in decrease in SDHB. Thus RACA plays a key role in cell proliferation, invasion, migration and apoptosis of human ovarian carcinoma through AMPK-HIF-1α pathway.     

Poricoic acid A induces apoptosis and autophagy in ovarian cancer via modulating the mTOR/p70s6k signaling axis

Due to the high mortality and rapid disease progression, ovarian cancer remains one of the most common malignancies threatening the health of women. The present study was conducted to explore the anticancer effects and the underlying mechanisms of poricoic acid A (PAA), the main components of Poria cocos, on ovarian cancer. We investigated the anticancer effects of different concentrations of PAA in the SKOV3 cell line. Cell viability and proliferation were examined by CCK-8 assay. Cellular migration and invasion were assessed by the scratch and Transwell migration assays, respectively. The effect of PPA on cell apoptosis was measured by flow cytometry and caspase-3/8/9 colorimetric assay. Western blot was performed to detect protein level changes related to apoptosis and mTOR signaling pathways. The in vivo anticancer effect of PAA was evaluated using xenograft tumorigenesis model in nude mice. Our results showed that PAA suppressed SKOV3 cellular viability, migration, and invasion in a dosage-dependent manner. Flow cytometry results demonstrated PAA treatment could induce SKOV3 cell apoptosis. In addition, increased ratio of LC3-II/LC3-I (a marker for autophagosome formation) was observed after PAA treatment, as well as inhibition of m-TOR and p70s6k phosphorylation. In nude mice, PAA treatment reduced the xenograft tumor weight by 70% (P<0.05). In conclusion, our data suggested that PAA induced apoptosis and autophagy in ovarian cancer via modulating the mTOR/p70s6k signaling axis.     

内皮抑素对人卵巢癌细胞系生长的抑制作用

目的探讨人内皮抑素对人卵巢癌SKOV3细胞生长的抑制作用及其作用机制。方法MTT法检测细胞生长;透射电镜观察细胞凋亡;免疫细胞化学、RT-PCR及Western blot法检测细胞中BCL-2和BAX蛋白及mRNA的表达。结果内皮抑素抑制SKOV3细胞增殖(P<0.01);能诱导SKOV3细胞凋亡;而对细胞中BCL-2和BAX蛋白及mRNA的表达无明显影响。结论人内皮抑素具有抑制卵巢癌细胞SKOV3生长的作用,其作用机制可能与诱发细胞凋亡相关。     

LncRNA MEG3 impacts proliferation,invasion, and migration of ovarian cancer cells through regulating PTEN

Objective and design

We investigated the expressions of lncRNA MEG3 and PTEN in ovarian cancer tissues and their effects on cell proliferation, cycle and apoptosis of ovarian cancer.

Methods

Expression levels of MEG3 in ovarian cancer cell lines and normal ovarian cell lines were detected by qRT-PCR. Cell viability was detected by MTT assay. Cell apoptosis and cell cycle distribution were measured by flow cytometry. Cell invasion capability was tested by transwell assay. Cell migration capacity was tested by wound healing. The xenograft model was constructed to explore the effect of lncRNA MEG3 on ovarian cancer in vivo.

Result

Compared with normal ovarian cells, expression levels of MEG3 and PTEN were relatively lower in ovarian cancer cells. There was a positive correlation between the expression of PTEN and the expression of MEG3. Enhanced expression level of PTEN suppressed SKOV3 cell proliferation, increased cell apoptosis rate, and decreased cell invasion and migration.

Conclusion

LncRNA MEG3 and PTEN were down-regulated in ovarian cancer cells. LncRNA MEG3 regulated the downstream gene PTEN in ovarian cancer cells to prohibit cell proliferation, promote apoptosis and block cell cycle progression.

     

不同频率脉冲电磁场对人卵巢癌SKOV3细胞增殖、凋亡及迁移的影响

研究不同频率的脉冲电磁场(PEMF)对人卵巢癌SKOV3细胞增殖、凋亡和迁移的影响,为PEMF治疗或预防卵巢癌切除术后发生骨质疏松患者的安全性提供实验参考数据。分别对体外培养的人SKOV3细胞施加不同频率(8、16、32和64Hz)、固定强度为1mT的PEMF,2次/d,30min/次,间隔12h,共3d,以未施加PEMF的细胞作为对照组。分别采用EdU荧光法、Annexin V-FITC荧光法和划痕实验检测SKOV3细胞增殖、凋亡及迁移的情况。结果:频率8Hz的PEMF能明显抑制SKOV3细胞的增殖,并诱导其凋亡。频率8Hz和32Hz的PEMF能明显促进人卵巢癌细胞SKOV3的迁移,而频率16Hz的PEMF却明显地抑制SKOV3细胞的迁移。提示不同频率的PEMF对人卵巢癌细胞SKOV3增殖、凋亡及迁移的影响不同。在临床中对于卵巢癌切除术后的骨质疏松患者,应当慎重考虑PEMF治疗的安全性,并严格选择治疗参数。     

miR-141-3p对卵巢癌的作用及其机制

目的:探究miR-141-3p在卵巢癌中的作用及其相关的分子机制.方法:实时荧光定量PCR检测30例卵巢囊肿和30例卵巢癌组织中miR-141-3p和表皮生长因子受体(EGFR)的表达水平.将SKOV3细胞分为NC组(无转染的SKOV3细胞),miR-141-3p组(SKOV3细胞转染miR-141-3p),LV-EG...     

过表达细胞黏附分子1抑制卵巢癌细胞迁移及侵袭

目的:研究过表达细胞黏附分子1(cell adhesion molecule 1,CADM1)对卵巢癌增殖、迁移和侵袭的影响.方法:qRT-PCR测定CADM1mRNA在卵巢癌细胞系SKOV3及人正常卵巢上皮细胞hose中的表达,将SKOV3细胞分成两组,即CADM1过表达组和对照组,转染48 h后Western印迹测定两组CADM1蛋白表达量,采用lipofectamine 2000分别转染pcDNA3.1-CADM1及pcDNA3.1质粒,采用CCK-8、克隆形成、细胞划痕及Transwell实验分别检测两组细胞增殖、克隆形成、细胞迁移及侵袭能力.结果:CADM1mRNA在SKOV3中表达水平显著低于hose细胞系(1.54±0.34 vs.5.63±0.96,p＜0.05);转染48 h后,CADM1过表达组和对照组CADM1蛋白表达量分别为2.53±0.42,0.37±0.09,差异具有统计学意义(P＜0.05).CADM1过表达组和对照组在0,24,48,72 h 450 nm处的OD值差异无统计学意义(P＞0.05);CADM1过表达组与对照组克隆形成数相比(60.4±7.6 vs.58.3±8.2),差异无统计学意义(P＞0.05);CADM1过表达组细胞迁移率显著低于对照组(20.3％±3.5％vs.60.1％±4.2％,P＜0.05);CADM1过表达组侵袭细胞数显著少于对照组(24.5±5.3 vs.65.1±6.9,P＜0.05).结论:CADM1在卵巢癌细胞系中低表达,过表达CADM1对卵巢癌细胞增殖和克隆形成无影响,但可抑制迁移和侵袭,起抑癌基因的作用.     

Efficient Inhibition of Ovarian Cancer by Gelonin Toxin Gene Delivered by Biodegradable Cationic Heparin-polyethyleneimine Nanogels

The use of toxins for cancer therapy has great promise. Gelonin, a potent plant toxin, causes cell death by inactivating the 60S ribosomal subunit. Recently, we developed a novel gene delivery system using biodegradable cationic heparin-polyethyleneimine (HPEI) nanogels. In the current study, the antitumor activity of a recombinant plasmid expressing gelonin (pGelonin) on human ovarian cancer was assessed. The application of HPEI nanogels, was also evaluated. Gelonin-cDNA was cloned into the pVAX1 plasmid vector and transfected into SKOV3 human ovarian cancer cells using biodegradable cationic HPEI nanogels. The expression of gelonin in vitro and in vivo was confirmed using RT-PCR and western blot analysis. Cell viability and apoptosis were examined using an MTT assay and flow cytometric analysis. For the in vivo study, an SKOV3 intraperitoneal ovarian carcinomatosis model was established, and nude mice were randomly assigned into four groups receiving i.p. administration of pGelonin/HPEI complexes, pVAX/HPEI complexes, HPEI alone and 5% glucose solution. The tumor weight was monitored, and a TUNEL assay and Ki-67 immunohistochemistry were performed to evaluate apoptosis and cell proliferation in the tumor tissue sections, respectively. Gelonin was efficiently expressed in SKOV3 cancer cells in vitro and in vivo using pGelonin incorporated with HPEI nanogels. The pGelonin/HPEI complexes inhibited cell viability and induced apoptosis in the cell culture. Treatment for intraperitoneal carcinomatosis with pGelonin/HPEI complexes reduced the tumor weight by ~58.55% compared to the control groups (P<0.05). The antitumor effect was accompanied by increased apoptosis and reduced cell proliferation (P<0.05). No significant side effects were observed with i.p. administration of the pGelonin/HPEI complexes. Our data indicate that HPEI nanogel-delivered pGelonin may have promising applications against human ovarian cancer.     

茶多酚对HL-60细胞株体外增殖及细胞周期的影响

目的 探讨茶多酚对人急性早幼粒白血病细胞株HL-60细胞增殖和细胞周期的影响.方法 采用四甲基偶氮唑盐微量酶反应比色法(MTT比色法)观察茶多酚对体外培养的HL-60细胞增殖活性的影响.采用HE染色、荧光染色观察用茶多酚后细胞形态变化.用流式细胞仪(FACS)检测细胞凋亡率及细胞周期.结果 (1)MTT比色法检测显示茶多酚能抑制HL-60细胞增殖,在一定范围内呈剂量和时间依赖性(P＜0.05).当茶多酚浓度达到400和800 mg/L时,48 h抑制率分别为(58.90±1.19)%和(72.57±0.70)%.(2)流式细胞仪分析,茶多酚处理组出现一特征性的亚二倍体凋亡峰.其凋亡率呈时间、剂量依赖性.(3)流式细胞术发现茶多酚可使HL-60细胞阻滞于S期,其阻滞细胞的数量与药物浓度呈正相剂量关系,以作用24 h对细胞周期的阻滞作用最强.结论 茶多酚能有效抑制HL-60细胞增殖,在一定范围内具有时间和剂量依赖性.茶多酚可体外诱导HL-60细胞凋亡,并使细胞周期阻滞于S期.     

Antiproliferative and toxicogenomic effects of resveratrol in bladder cancer cells with different TP53 status

The antitumor activity of resveratrol, a polyphenolic compound found mainly in grapes, has been studied in several types of cancer. In bladder cancer, its antiproliferative effects have already been demonstrated; however, its mechanism of action is not completely understood. The aim of this study was to evaluate resveratrol antitumor activity (12.5, 25, 50, 100, 150, 200, and 250 μM) and its possible mechanisms of action in bladder tumor cells with different TP53 gene status (RT4, grade 1, TP53 wild type; 5637-grade 2 and T24-grade 3, TP53 mutated). Cell proliferation, clonogenic survival, morphological changes, cell cycle progression, apoptosis rates, genotoxicity, global methylation, immunocytochemistry for p53 and PCNA and relative expression profiles of the AKT, mTOR, RASSF1A, HOXB3, SRC, PLK1, and DNMT1 were evaluated. Resveratrol decreased cell proliferation and induced DNA damage in all cell lines. Regarding the long-term effects, resveratrol reduced the number of colonies in all cell lines; however, TP53 wild type cells were more resistant. Increased rates of apoptosis were found in the TP53 wild type cells and this was accompanied by AKT, mTOR, and SRC downregulation. In addition, the resveratrol antiproliferative effects in wild type TP53 cells were accompanied by modulation of the DNMT1 gene. In the TP53 mutated cells, cell cycle arrest at S phase with PLK1 downregulation was observed. Additionally, there was modulation of the HOXB3/RASSF1A pathway and nuclear PCNA reduction in the highest-grade cells. In conclusion, resveratrol has antiproliferative activity in bladder tumor cells; however, the mechanisms of action are dependent on TP53 status. Environ. Mol. Mutagen., 60:740–751, 2019. © 2019 Wiley Periodicals, Inc.     

野生型PTEN基因对卵巢癌细胞株的影响

目的： 观察转入野生型PTEN基因的卵巢癌细胞生物学行为变化，探索该基因对卵巢癌细胞周期的影响和抑制肿瘤侵袭的机制。 方法： 将野生型PTEN基因的pcDNA3.1Hygro(-)真核质粒载体转染SKOV3细胞系，潮霉素筛选稳定表达细胞株并扩增培养；采用流式细胞术检测肿瘤细胞周期变化；用MTT法检测细胞抑制率。分别用RT-PCR检测转染前后PTEN mRNA表达水平变化；采用重组基底膜侵袭模型，观察转染前后细胞侵袭力的变化。 结果： 成功转染SKOV3并稳定表达PTEN，转染PTEN可以明显改变SKOV3细胞周期，使其阻滞于S期；明显抑制肿瘤细胞的侵袭力。 结论： 提示转染外源野生型PTEN基因可使SKOV3细胞周期阻滞于S期，并且通过抑制肿瘤细胞侵袭与生长，而具有明显的抑癌作用。     

Activated platelets enhance ovarian cancer cell invasion in a cellular model of metastasis

Increased platelet counts and systemic coagulation activation are associated with ovarian cancer progression. Platelet activation occurs in the tumor microenvironment and may influence local invasion and metastasis. We used a cellular model of tumor invasion to investigate the effect of activated platelets on the human ovarian cancer cell line, SKOV3. SKOV3 cells were exposed to washed, thrombin receptor activating peptide (TRAP)-activated or TRAP-naïve platelets under various experimental conditions, and tumor cell invasion was assayed in Matrigel^® chambers. The effect of platelets on the content of urokinase plasminogen activator (uPA) and VEGF in SKOV3 cell conditioned medium was measured using an ELISA assay. TRAP-activated platelets stimulated a dose-dependent increase in SKOV3 cell invasion. Exposure to activated platelet membranes and to soluble proteins contained in activated platelet releasate both contributed to the observed increase in invasion. The inhibition of platelet activation with prostaglandin E1 (PGE₁) attenuated the invasive capacity of SKOV3 cells. Exposure to platelets resulted in significantly increased uPA and VEGF content of SKOV3 cell conditioned medium. Activated platelets enhance SKOV3 human ovarian cancer cell invasion through Matrigel^® and increase the amount of uPA and VEGF secreted into SKOV3 cell conditioned medium. If generalizable to additional cell lines and human disease, this observation may partially explain the adverse prognosis associated with thrombocytosis in ovarian cancer. Platelets, therefore, may represent a potential target for therapeutic intervention in human ovarian cancer.     

Methoxy poly (ethylene glycol)-b-poly (δ-valerolactone) copolymeric micelles for improved skin delivery of ketoconazole

Ketoconazole is a broad spectrum imidazole antifungal drug. For the treatment of superficial fungal infections with ketoconazole, it needs to be permeated to deep skin layers. In order to develop topical formulation of ketoconazole for improving its skin deposition and water-solubility, ketoconazole-loaded methoxy poly (ethylene glycol)-b-poly (δ-valerolactone) micelles were developed through thin-film hydration method. Particle size, drug loading capacity, infrared spectrum and X-ray diffraction of drug-loaded micelles were characterized. The optimal drug formulation was selected for skin delivery and deposition investigation performed by use of mice skin, and its in vitro release and antifungal activity were also investigated. Penetration and distribution in the skin were also visualized using fluorescein-loaded micelles and fluorescence microscopy. The drug-loaded micelles were obtained with encapsulation efficiency of 86.39% and particle diameter of about 12 nm. The micelles made ketoconazole aqueous solubility increase to 86-fold higher than crude one. Ketoconazole-loaded micelles showed no skin permeation of ketoconazole, obviously enhance skin deposition and demonstrated similar antifungal activity as compared with marketed ketoconazole cream. Fluorescein-loaded micelles displayed higher skin deposition than fluorescein water solution. These results demonstrate that the MPEG-PVL micelle is a potential delivery system for ketoconazole in the field of skin delivery.     

Roles of ligand and TPGS of micelles in regulating internalization,penetration and accumulation against sensitive or resistant tumor and therapy for multidrug resistant tumors

There are several obstacles in the process of successful treatment of malignant tumors, including toxicity to normal cells, inefficiency of drug permeation and accumulation into the deep tissue of solid tumor, and multidrug resistance (MDR). In this work, we prepared docetaxel (DTX)-loaded hybrid micelles with DSPE–PEG and TPGS (TPGS/DTX-M), where TPGS serves as an effective P-gp inhibitor for overcoming MDR, and active targeting hybrid micelles (FA@TPGS/DTX-M) with targeting ligand of folate on the hybrid micelles surface offering active targeting to folate receptor-overexpressed tumor cells. A systematic comparative evaluation of these micelles on cellular internalization, sub-cellular distribution, antiproliferation, mitochondrial membrane potential, cell apoptosis and cell cycle, permeation and inhibition on 3-dimensional multicellular tumor spheroids, as well as antitumor efficacy and safety assay in vivo were well performed between sensitive KB tumors and resistant KBv tumors, and among P-gp substrate or not. We found that the roles of folate and TPGS varied due to the sensitivity of tumors and the loaded molecules in the micelles. Folate and folate receptor-mediated endocytosis played a leading role in internalization, permeation and accumulation for sensitive tumors and non-substrates of P-gp. On the contrary, TPGS played the predominant role which dramatically decreased the efflux of drugs both when the tumor is resistant and for P-gp substrate. These findings are very meaningful for guiding the design of carrier delivery system to treat tumors. The antitumor efficacy in xenograft nude mice model and safety assay showed that the TPGS/DTX-M and FA@TPGS/DTX-M significantly exhibited higher antitumor activity against resistant KBv tumors than the marketed formulation and normal micelles owing to the small size (approximately 20 nm), hydrophilic PEGylation, TPGS inhibition of P-gp function, and folate receptor-modified endocytosis, permeation and accumulation in solid tumor, as well as synergistic effects of DTX-induced cell division inhibition, growth restraint and TPGS-triggered mitochondrial apoptosis in tumor cells. In conclusion, folate-modified TPGS hybrid micelles provide a synergistic strategy for effective delivery of DTX into KBv cells and overcoming MDR.     

抗HER-2嵌合抗体chA21对SKOV3细胞增殖的抑制及诱导其凋亡的作用

目的：探讨抗HER-2嵌合抗体chA21在体外抑制高表达HER-2的人卵巢癌SKOV3细胞增殖并诱导其凋亡的作用。方法：采用MTT比色法、HE染色、透射电镜、流式细胞术及TUNEL染色法等观察和检测chA21对人卵巢癌细胞SKOV3增殖抑制和凋亡的诱导作用：结果：chA21（0．2mg／L～5．4mg／L）可显著抑制SKOV3细胞增殖并诱导其凋亡．其作用呈剂量和时间依赖性：结论：chA21在体外可显著抑制SKOV3细胞的增殖，诱导凋亡可能是其主要的作用途径，     

Specific cell targeting with APRPG conjugated PEG–PLGA nanoparticles for treating ovarian cancer

Good biocompatibility, specific tumor targeting, effective drug loading capacity and persistence in the circulation in vivo are imperative prerequisites for the antitumor efficiency of nanoparticles and their further clinical application. In this study, APRPG (Ala-Pro-Arg-Pro-Gly) peptide-modified poly (ethylene glycol)–poly (lactic acid) (PEG–PLA) nanoparticles (NP-APRPG) encapsulating inhibitors of angiogenesis (TNP-470) (TNP-470-NP-APRPG) were fabricated. TNP-470-NP-APRPG was designed to feature maleimide-PEG–PLA and mPEG–PLA as carrier materials, the APRPG peptide for targeting angiogenesis, PEG for prolonging circulation in vivo and PLA for loading TNP-470. TNP-470-NP-APRPG was confirmed to be approximately 130 nm in size with negative ζ-potential (−14.3 mV), narrow distribution (PDI = 0.27) and spherical morphology according to dynamic light scattering (DLS) and transmission electron microscopy (TEM) analyses. In addition, X-ray photoelectron spectra (XPS) analyses confirmed 7.73% APRPG grafting on the TNP-470-NP. In vitro, TNP-470-NP-APRPG exhibited effective inhibition of proliferation, migration and tube formation in human umbilical vein endothelial cells (HUVECs). Similar findings were observed for the retardation of tumor growth in SKOV3 ovarian cancer-bearing mice, suggesting the significant inhibition of angiogenesis and antitumor efficiency of TNP-470-NP-APRPG. Moreover, no obvious toxic drug responses were observed. Further evidence obtained from the immunohistochemical examination demonstrated that the tumor growth inhibition was closely correlated with the high rate of apoptosis among endothelial cells and the effective blockade of endothelial cell proliferation. These results demonstrate that NP-APRPG is a promising carrier for delivering TNP-470 to treat ovarian cancer and that this approach has the potential to achieve broad tumor coverage in the clinic.     

NEDD8 共价修饰抑制因子MLN4924 对人卵巢癌细胞株SKOV3 增殖和凋亡的影响

目的:探讨神经前体细胞发育相关受控表达分子8(NEDD8)共价修饰抑制因子MLN4924 对人卵巢癌细胞增殖和凋亡的影响,并分析其可能机制。方法:使用不同浓度MLN4924(0、0.125、0.25、0.5 μmol/ L) 处理人卵巢癌细胞株SKOV3 4 h,免疫印迹法检测PAR3、HER2、Neddylated-cullins、P鄄I资B琢的表达水平;同时取细胞培养上清用ELISA 检测IL-6 的分泌。不同浓度MLN4924 处理SKOV3 细胞72 h,CCK8 法检测细胞增殖抑制率,流式细胞仪检测细胞周期和细胞凋亡率。结果:MLN4924 作用4 h 时,能够使Neddylated-cullins 下降、P-κBα积聚,IL-6 分泌减少,而PAR3、HER2 表达水平变化不显著。MLN4924 在0.125、0.25 和0.5 μmol/ L 的浓度下处理SKOV3 细胞72 h 时,对细胞增殖有明显的抑制作用,并且随着剂量的加大,抑制效果也显著提高;同时加药组S 期细胞百分率相较于对照组明显升高,且形成大量四倍体,使之没有完整的细胞周期;细胞凋亡率也随MLN4924 剂量增大而升高。结论:NEDD8 修饰特异性抑制剂MLN4924 能够明显抑制人卵巢癌细胞株SKOV3 的增殖,诱导细胞周期阻滞和凋亡。上述效应可能与NF-κB 通路活性受到抑制和IL-6 表达下降有关。     

青藤碱抑制人卵巢癌SKOV3细胞活力、迁移和侵袭

目的:观察青藤碱对人卵巢癌SKOV3细胞活力、迁移和侵袭的影响,并探讨其可能的分子机制。方法:分别采用不同浓度的青藤碱处理SKOV3细胞12、24和48 h,采用CCK-8法检测细胞活力,采用流式细胞术检测细胞周期,采用Transwell实验检测细胞迁移率和侵袭率,同时采用Western blot法检测细胞周期素(cyclin)A、cyclin D1、E-cadherin和基质金属蛋白酶9(matrix metalloproteinase-9,MMP-9)的蛋白表达水平。结果 :随着青藤碱作用浓度和作用时间的增加,SKOV3和IOSE80细胞活力逐渐降低,青藤碱作用SKOV3和IOSE80细胞48 h的半数抑制浓度(IC_(50))分别为2.12 mmol/L和17.35 mmol/L;青藤碱可呈剂量依赖性地诱导SKOV3细胞发生G_0/G_1期和S期阻滞(P0.05),抑制SKOV3细胞迁移和侵袭(P0.05),下调cyclin A、cyclin D1和MMP-9蛋白水平(P0.05),并上调E-cadherin蛋白水平(P0.05)。结论 :青藤碱可在体外抑制人卵巢癌SKOV3细胞活力、迁移和侵袭,这可能与其下调cyclin D1、cyclin A和MMP-9蛋白水平,以及上调E-cadherin蛋白水平有关。     

Cisplatin–alginate conjugate liposomes for targeted delivery to EGFR-positive ovarian cancer cells

Systemic side effects and low aqueous solubility have limited the clinical use of cisplatin (CDDP) in ovarian carcinoma and have contributed to failures in developing effective drug delivery systems. In order to develop a novel drug delivery system with enhanced efficacy and minimal adverse effects, we exploited the properties of sodium alginate (SA) to synthesize CDDP–SA conjugate (CS), which is highly soluble and readily incorporated into liposomes (CS-PEG-Lip). Epidermal growth factor receptor (EGFR) is overexpressed in many ovarian cancers, therefore we modified EGF on the liposomes (CS-EGF-Lip) to specifically target EGFR-expressing tumors, thereby increasing the bioavailability and efficacy of CDDP. In vitro experiments confirmed that EGF-Lip selectively recognized EGFR-positive SKOV3 cells and effectively penetrated tumor spheroids. We demonstrated that CS-EGF-Lip possessed satisfactory size distribution and exhibited significantly improved encapsulation and loading efficiency. Furthermore, CS-EGF-Lip sustained release of CDDP in vitro, suggesting that CS-EGF-Lip may retain the antitumor activity of CDDP. Inhibition of proliferation and migration was also greater with CS-EGF-Lip compared to CDDP. In vivo xenograft experiments revealed that administration of CS-EGF-Lip enhanced delivery of CDDP into ovarian tumor tissues and improved the antitumor efficacy of CDDP, while reducing nephrotoxicity and body weight loss in mice. These results suggest that CS-EGF-Lip may offer a promising strategy for CDDP delivery in the treatment of EGFR-positive ovarian carcinoma or similar tumors, with enhanced efficacy and fewer adverse effects.     

Long non-coding RNA TP73-AS1 predicts poor prognosis and regulates cell proliferation and migration in cervical cancer

IntroductionCervical cancer is one of the most common malignant tumors in women, which seriously affects women’s health, especially in developing countries. This study aims to investigate novel molecular markers for poor prognosis of cervical cancer to achieve correct guidance of clinical treatment, accurate assessment of prognosis, and provide a new basis for the choice of reasonable treatment options for cervical cancer patients.Material and methodsQRT-PCR was employed to investigate the expression of lncRNA TP73-AS1 in cervical cancer tissues and cell lines. COX multivariate analysis showed the relationship between TP73-AS1 expression and clinicopathological features of patients with cervical cancer. Colony formation and MTT assay detected the effect of TP73-AS1 on proliferation of cervical cancer cells. The effect of TP73-AS1 on migration and invasion of cervical cancer cells was determined by the wound-healing assay and transwell assay. Western blot was performed to assess the expression of EMT markers.ResultsThis study showed that lncRNA TP73-AS1 was up-regulated in cervical cancer tissues and cell lines (p < 0.001), and high expression of TP73-AS1 could be considered as an independent prognostic factor (p < 0.05). Moreover, lncRNA TP73-AS1 promotes cervical cancer cell migration and invasion, and knockdown of TP73-AS1 inhibits the growth of cervical cancer cells (p < 0.001).ConclusionsOur results indicated that lncRNA TP73-AS1 was up-regulated in cervical cancer tissues and cell lines, predicting poor prognosis of cervical cancer and regulating cell proliferation and migration.