New 4-imino-4H-Chromeno[2,3-d]Pyrimidin-3(5H)-Amine: Synthesis, Cytotoxic Effects on Tumoral Cell Lines and in Silico ADMET Properties

The synthesis of new 4-imino-4H-chromeno[2,3-d]pyrimidin-3(5H)-amine in four steps including one step under microwave dielectric heating is reported. The structural identity of the synthesized compounds was established according to their spectroscopic analysis, such as FT-IR, NMR and mass spectroscopy. These new compounds were tested for their antiproliferative activities on seven representative human tumoral cell lines (Huh7 D12, Caco2, MDA-MB231, MDA-MB468, HCT116, PC3 and MCF7) and also on fibroblasts. Among them, only the compounds 6c showed micromolar cytotoxic activity on tumor cell lines (1.8 50 50 > 25 μM). Finally, in silico ADMET studies ware performed to investigate the possibility of using of the identified compound 6c as potential anti-tumor compound.

白藜芦醇通过介导GAL-3表达促进卵巢癌细胞凋亡并增强其化疗感性

目的 探讨白藜芦醇(RES)对卵巢癌细胞凋亡和化疗敏感性的影响及其作用机制。方法研究样本为卵巢癌SKOV3细胞,分为3组,每组11株,均进行常规培养,对照组不给予干预,顺铂组给予10μmol/L顺铂干预,RES+顺铂组给予50μmol/L RES+10μmol/L顺铂干预。采用CCK-8实验检测细胞活力,BrdU实验检测细胞增殖,Annexin V-FITC/PI双染细胞凋亡试验检测细胞凋亡,比色测定试验检测caspase-3活性,Transwell细胞迁移实验检测细胞迁移能力,侵袭试验检测细胞侵袭能力,蛋白质印迹分析caspase-3、GAL-3、p-Akt、AKT、Iκβα、P65、Bcl-2、 p-IKKα/β蛋白相对表达。结果 RES+顺铂组、顺铂组、对照组细胞活力分别为(62±14)%、(74±16)%、(98±16)%,细胞增殖率分别为(59±16)%、(76±17)%、(97±17)%,RES+顺铂组、顺铂组细胞活力、细胞增殖率显著低于对照组,RES+顺铂组显著低于顺铂组(P<0.05);RES+顺铂组、顺铂组、对照组细胞凋亡率分别为(64.29±13.14)%、(47.48±9.52)%、(14.72±3.03)%,RES+顺铂组、顺铂组细胞凋亡率显著高于对照组,RES+顺铂组显著高于顺铂组(P<0.05);RES+顺铂组caspase-3活性、蛋白相对表达显著高于顺铂组、对照组(P<0.05);RES+顺铂组、顺铂组细胞迁移量、细胞侵袭量显著低于对照组,RES+顺铂组显著低于顺铂组(P<0.05);RES+顺铂组GAL-3、p-Akt蛋白相对表达显著低于顺铂组、对照组(P<0.05),各组AKT蛋白表达差异无统计学意义(P<0.05);RES+顺铂组、顺铂组p-IKKα/β、P65、Bcl-2、蛋白相对表达显著低于对照组,RES+顺铂组显著低于顺铂组(P<0.05);RES+顺铂组、顺铂组Iκβα蛋白相对表达显著高于对照组,RES+顺铂组显著高于顺铂组(P<0.05)。结论 RES诱导癌细胞凋亡可能与GAL-3水平降低有关。其作用机制可能是通过调节卵巢癌细胞凋亡、转移相关蛋白表达抑制其增殖、侵袭并增强其对顺铂的敏感性。

Lentivirus vectors construction of SiRNA targeting interference GPC3 gene and its biological effects on liver cancer cell lines Huh-7

Objective:To build GPC3 gene short hairpin interference RNA(shRNA)slow virus veclor.observe expression of Huh-7 GPC3 gene in human liver cell line proliferation apoptosis and the effect of GPC3 gene influencing on liver cancer cell growth,and provide theoretical basis for genc therapy of liver cancer.Methods:Hepatocellular carcinoma cell line Huh-7 wsa transfected by a RNA interference technique.GPC3 gene expression in a variety of liver cancer cell lines was detected by fluorescence quantitative PCR.Targeted GPC3 gene seqnences of small interfering RNA(siRNA)PGC-shRNA-GPC3 were restructured.Stable expression cell linse of siRNA were screened and established with the heplp of liposomes(lipofectamine^(TM2000))as carrier transfcetion of human liver cell lines.In order to validate siRNA interference efficiency.GPC3 siRNA mRNA expression was detected after transfection by using RT-PCR and Western blot.The absorbance value of the cells of blank group,untransfection group and transfection group,the cell cycle and cell apoptosis were calculated,and effects of GPC3 gene nn Huh-7 cell proliferation and apoptosis were observed.Results:In the liver cancer cell lines Huh-7 GPC3 gene showed high expression.PGC-shRNA-GPC3 recombinant plasmid was constructde successfully via sequencing validation.Stable recombinant plasmid transfected into liver cancer cell linse Huh-7can obviously inhibit GPC3 mRNA expression level.Conclusions:The targeted GPC3 siRNA can effectively inhibit the expression of GPC3.

Potential roles of EZH2, Bmi-1 and mi R-203 in cell proliferation and invasion in hepatocellular carcinoma cell line Hep3B

AIM: To investigate the potential roles of enhancer of zeste homolog2(EZH2), Bmi-1 and mi R-203 in cell proliferation and invasion in hepatocellular carcinoma(HCC) cell line Hep3 B.METHODS: A total of 73 patients who underwent surgical resection at Fuzong Clinical Medical College of Fujian Medical University were enrolled in this study. Hep3 B cells were cultivated in RPMI 1640 medium supplemented with 10% fetal bovine serum at 37?℃. Vectors that containing c DNA of the EZH2 gene or mi R-203 targeted sh RNA plasmid were constructed, and then transfected into Hep3 B cells. The m RNA expression of mi R-203, EZH2, and Bmi-1 was analyzed using quantitative real-time polymerase chain reaction analysis, and the protein levels of EZH2 and Bmi-1 were detected by Western blot analysis. Effect of EZH2 or mi R-203 on cell proliferation was observed by methyl thiazolyl tetrazolium assay, and cell apoptosis was assessed using flow cytometry. Besides, effect of EZH2 or mi R-203 on tumor cell invasion was detected using Transwell assay.RESULTS: The m RNA levels of EZH2 and Bmi-1 in HCC tissues and in Hep3 B cells were significantly higher compared with those in normal samples(P < 0.01), while mi R-203 level was significantly lower in HCC tissues(P < 0.01). Hep3 B cells transfected with EZH2-sh RNA or mi R-203-sh RNA showed lower expression levels of EZH2 and Bmi-1(P < 0.05). Compared with controls, Hep3 B cells transfected with EZH2-sh RNA had relative slow cell proliferation, indicating that low expression of EZH2 and Bmi-1 and overexpression of mi R-203 could inhibit Hep3 B cell proliferation(P < 0.05). The average apoptosis rate of Hep3 B cells transfected with EZH2-sh RNA vector was about 18.631%, while that of Hep3 B cells transfected with sh RNA vector was about 5.33%, suggesting that EZH2 was down-regulated by transfecting with EZH2-sh RNA, and the down-regulated EZH2 contributed to the cell apoptosis. Low expression of EZH2 and Bmi-1 and overexpression of mi R-203 could reduce Hep3 B cell invasion(P < 0.05).CONCLUSION: Our study suggests that EZH2 and Bmi-1 are up-regulated while mi R-203 is downregulated in Hep3 B cells. Mi R-203 may contribute to the metastasis and enhance apoptosis of HCC cells by regulating EZH2 and Bmi-1. Our study may provide a theoretical basis for metastasis of HCC and targeted therapy of HCC.

MiR-25-3p attenuates the proliferation of tongue squamous cell carcinoma cell line Tca8113

Objective:To investigate the effects of miR-25-3p on the occurrence,development and proliferation of tongue squamous cell carcinoma cells.Methods:To establish tongue squamous cell carcinoma cell line Tca8113 that stably and highly express miR-25-3p using recombinant reiroviral vector-mediated gene transfer method.The proliferation of transfected Tca8113 was detected by thiazolyl blue tetrazolium bromide(MTT)and cell colony formation assays.eyclnD1,p21^(cipt)and p27^(kipt)mRNA expressions in the transfected Tca-8113 were detected by quantitative PCR.cyclinD1,p21^(cipt),p27^(kipt),AKT,p-AKT,FOXOt and p-FOX01 expressions in the transfected Tca8113 were detected by western blot analysis.In addition,miR-25-3p expression in the tongue squamous cell carcinoma cell line and tissue specimen was also detected by quantitative PCR.Results:Quantitative PCR showed that mitt-25-3p expression in the tongue squamous cell carcinoma cell lines and tissue specimen was significantly lower than that in the adjacent tissue.MTT and cell colony formation assays showed that after miR-25-3p overexpression,the proliferation of transfected Tca8113 was obviously attenuated.Western blot analysis and quantitative PCR showed that after miR-25-3p overexpression.p21^(cipt)and p27^(kipt)expressions were upregulated,while cyclinD1,AKT,FOXO1 expressions were downregulated,and AKT and FOXO1 phosphorylation was inactivated in the transfected Tca8113 cells.Conclusions:MiR-25-3p inhibited the proliferation of tongue squamous cell carcinoma cells and regulated cell cycle-related protein expression,playing an important role in the occurrence and development of squamous cell carcinoma of the tongue.

Contragestazol (DL111-IT) inhibits proliferation of human androgen-independent prostate cancer cell line PC3 in vitro and in vivo

Aim： To evaluate the antiproliferative activity of contragestazol （DL111-IT） on the human prostate cancer cell line PC3 in vitro and in vivo and to elucidate its potential molecular mechanisms. Methods： The cell killing ability of DL111-IT was measured by the 3-（4,5-dimethylthia-zol,2-yl）-2,5-diphenyltetrazolium bromide （MTT） reagent assay method and the tumor xenograft model. The cell cycle was analyzed by flow cytometry and protein expression, including retinoblastoma （pRb）, cyclin-dependent kinase 4 （CDK4） and cyclin D 1, was detected by Western blotting. Results： DL111-IT exhibited high efficiency on cell growth inhibition of the human androgen-independent prostate cancer cell line PC3. The drug concentration that yielded 50 % cell inhibition （IC50 value） was 9.9 mg/mL. In the PC3 tumor xenograft study, DL111-IT （1.25 mg/kg-20.0 mg/kg） given once a day for 10 days significantly inhibited tumor growth, with the inhibition rate ranging from 21% to 50 %. Flow cytometric analysis indicated that DL111-IT could cause GI arrest in the PC3 cell line, but not apoptosis. DL111-IT enhanced pRb expression and down-regulated CDK4 and cyclin D 1 expression, suggesting that cell cycle regulation might contribute to the anticancer property of DL 111- IT. Conclusion： DL111-1T inhibits the proliferation of human androgen-independent prostate cancer cell line PC3 in vitro and in vivo by a cell cycle regulation pathway.

Inhibitory effect of a new gossypol derivative apogossypolone (ApoG2) on xenograft of human prostate cancer cell line PC-3

Objective: To investigate the inhibitory effect of apogossypolone (ApoG2) on prostate cancer cell line PC-3 in vivo, and explore its mechanism. Methods: The models of transplantation tumors in Balb/c nu/nu mice were established via subcutaneous injection of PC-3 cells and the tumor-transplanted mice were divided into 4 groups: control group and three ApoG2 treatment groups, with 10 mice in each group. Volumes of the tumor were estimated every 2 d and the morphology of tumor tissues was observed. Immunohistochemistry was employed to observe the expression of Bcl-2, PCNA, CD31, caspase-3 and caspase-8 in tumor tissues. Results: ApoG2 (2.5 mg/kg-10 mg/kg) given intraperitoneally once a day can obviously inhibit the growth of subcutaneous prostatic carcinoma implant. The tumor volume decreased obviously when the treatment dosage was bigger than 5.0 mg/kg (P<0.01). Meanwhile, ApoG2 decreased the expression of PCNA and CD31, and enhanced the expression of caspases-3, caspase-8 in tumor tissues. Conclusion: ApoG2 exert an inhibitory effect on prostatic carcinoma possibly by inducing apoptosis and inhibiting tumor angiogenesis.

The U937 cell line induced to express CD14 protein by 1,25-dihydroxyvitamin D3 and be sensitive to endotoxin stimulation

BACKGROUND: CD14 was first described as a differentia- tion antigen on the surface of myeloid lineage cells. It acts as a glycosylphosphatidylinositol ( GPI)-anchored receptor for the complex of lipopolysaccharide (LPS) and plays a key role in the activation of LPS-induced monocytes. The purpose of this study was to observe the expression of CD14 protein and its gene in the human U937 promonocytic cell line when these cells were exposed to 1,25-dihydroxyvita- min D3 ( VitD3 ) and investigate their sensitivity to endo- toxin stimulation. METHODS: U937 cells were exposed to (0.1 μmol) VitD3 for 24 hours and were induced to express the CD14 mRNA gene and CD14 protein, then their responses were observed when they were stimulated with different concentrations of LPS for different time. RESULTS: The U937 cells induced by VitD3 were found to stably express CD14 mRNA and CD14 protein. And CD14 protein enhanced the sensitivity of U937/CD14 cells to li- popolysaccharide ( LPS ) stimulation. NF-ΚB in U937/ CD14 cells can be activated with low concentration of LPS (1 ng/ml-10 ng/ml), the TNF-α mRNA gene was in- duced , and then TNF-α was produced and released into the supernatant of culture. CONCLUSION: VitD3 can induce U937 cell to express the CD14 gene and CD14 protein and enhance the response of this type of cells to LPS stimulation.

3-甲基腺嘌呤对转化生长因子-β诱导大鼠肝脏星形细胞株HSC-T6活化及自噬的影响观察

目的观察3-甲基腺嘌呤(3-MA)对转化生长因子-β(TGF-β)诱导的大鼠肝星形细胞株HSC-T6活化及自噬的影响。方法取对数生长期的HSC-T6细胞分为空白组、TGF-β+PBS组、TGF-β+3-MA组。TGF-β+3-MA组细胞加入浓度为2 ng/mL TGF-β培养72 h后加入3-MA(0.5 mg/mL)处理24 h,TGF-β+PBS组细胞加入浓度为2 ng/mL TGF-β培养72 h后加入等量PBS处理24 h,空白组加入等量PBS处理,采用实时荧光定量PCR法检测各组细胞活化标志物α-SMA、TGF-βmRNA和自噬标志物LC3、Beclin-1、Atg5 mRNA,采用Western blotting法检测各组细胞活化标志物α-SMA、TGF-β蛋白和自噬标志物LC3、Beclin-1、Atg5蛋白。结果TGF-β+PBS组、TGF-β+3-MA组细胞活化标志物α-SMA、TGF-βmRNA和蛋白均高于空白组,且TGF-β+3-MA组均低于TGF-β+PBS组(P均<0.05)。TGF-β+PBS组、TGF-β+3-MA组细胞自噬标志物LC3、Beclin-1、Atg5 mRNA和蛋白均高于空白组,且TGF-β+3-MA组均低于TGF-β+PBS组(P均<0.05)。结论3-MA可抑制TGF-β诱导的大鼠肝星形细胞株HSC-T6活化及自噬。

THE DIFFERENTIATION OF HUMAN GASTRIC ADENOCAR-CINOMA CELL LINE MGc80-3 INDUCED BY DIBUTYRYL cAMP IN VITRO

For providing some experimental basis in establishing malignant phenotypic reversed indexes of gastric carcinoma cells, human gastric adenocar-cinoma cell line MGc80-3 was induced by dBcAMP in vitro to appraise the effect of gastric carcinoma cell differentiation by chemical inducers.Under light microscope, MGc80-3 cells, after treated with 1 mM dBcAMP, tended to be flat and disperse, and their volume gradually enlarged, with their uncleus relatively smaller and their shape rather regular. Morphological changes, like norma differentiated epithelial cells, were observed. The cells attached firmly, grew slowly, their growth curve showed inhibitory rate amounted to 52.87%, and cellular division exponent displayed their peak value 1.5 times less than that of MGc80-3 cells. It was clear that dBcAMP could effectively inhibit the multiplication activity of MGc80-3 cells. After dBcAMP treatment, remarkable changes of cell surface charges was indicated by cell electrophoresis, the ratio dropped to 3.043 from 3.988, and their re-tardant ratio reached up to 31.2%. cAMP content in cells after this treatment, detected by cAMP and cGMP radioimmunoassay, was enhanced by 2.42 times, and cAMP/cGMP ratio, by 1.73 times. Thus, cAMP level within MGc80-3 cells was raised obviously by dBcAMP. Heterotransplantation experiments showed that tuntorigenic rate of MGc80-5 cells (transplanted subcutaneously to BALB/c mice) amounted to 100%, and that of the cells after this treatment was only 5.6%. Their tumorigenic ability was extremely reduced.These results confirmed that dBcAMP was able to change malignant phenotypic characteristics of MGc80-3 cells and produce a reversed alteration: Thus, it has a remarkable inductive effect in differentiating gastric carcinoma cells. All these characteristics were also considered as the reference indexes in appraising reversed effect for the homologous cancer cells.

Effects of 4-(3-Chloro-Benzyl)-6,7-Dimethoxy-Quinazoline on Kinetics of P120-Catenin and Periplakin in Human Buccal Mucosa Squamous Carcinoma Cell Line

In order to detect molecular markers for the epidermal growth factor inhibitor 4-(3-chloro-benzyl)- 6,7-dimethoxy-quinazoline (tyrphostin), we investigated the kinetics of p120-catenin and periplakin in the human buccal mucosa squamous cancer cell line BICR 10 treated with 3 nM tyrphostin. Growth of BICR 10 cells was inhibited by treatment with tyrphostin. Although changes were not observed in the expression of EGFR and p120-catenin, expression of Akt, Src and periplakin in BICR 10 treated with 3 nM tyrphostin tended to decrease. In addition, phosphorylation of EGFR, Akt and Src was inhibited by treatment with tyrphostin. On immunocytochemical staining, immunoreactions with phosphorylated EGFR, phosphorylated Akt and phosphorylated p120-catenin were weak in BICR 10 treated with tyrphostin. There was a slight immunocy to chemical reaction to periplakin in BICR 10 cells induced by tyrphostin. In conclusion, the decrease in phosphorylation in EGFR and p120-catenin by tyrphostin, following the decrease in Src or Akt phosphorylation, may inhibit expression of several growth factors associated with the proliferation and migration of cancer cells.

Apoptosis Induced by Ginsenoside Rg3 in a Human Bladder Carcinoma Cell Line

OBJECTIVE This study was conducted to explore the effect of Rg3 on inhibition of proliferation and induction of apoptosis in bladder cancer cells. METHODS The EJ bladder cancer cell line was treated with Rg3 at various concentrations. Cell proliferation was measured by the MTT assay. Morphological changes in the cells were observed by fluorescent staining using Hoechst 33258. The cell cycle and apoptotic rate were analyzed by flow cytometry （FCM） and the expression of caspase-3 in cells was detected by immunocytochemistry. DNA ladder analysis was conducted by agarose gel electrophoresis. RESULTS Rg3 inhibited proliferation of EJ cells in a concentration-dependent manner, resulting in an IC50 for Rg3 at 48 h of 125.5 μg/ml. When treated with 150 μg/ml of Rg3 for 24 h and 48 h, the cells showed apoptotic morphological characteristics including condensed chromatin, nuclear fragmentation, apoptotic bodies and bright fluorescent granules as well as a higher caspase-3 expression. The FCM assay indicated that Rg3 altered the cell cycle and induced apoptosis of the EJ cells, when treated for 24 h and 48 h with 75 μg/ml of Rg3 as well as for 48 h with 150 μg/ml. The percentages of cells in the S phase and the GJM transition were increased, whereas the percentages of cells in the G0-G1 transition were decreased. The apoptotic rates were increased from （1.05±0.17）% in the control group cells to （8.41 ±0.98）%, （18.57±2.20）% and （33.98±1,64）% respectively. Significant changes in the DNA ladders, showed that the effects of Rg3 were displayed in a dose and time dependent manner. CONCLUSION The results suggest that Ginsenoside Rg3 exerts an inhibitory effect on proliferation of EJ cells by inducing apoptosis.

过表达膜定位IL-3的293T细胞外泌体的纯化及体外功能验证

目的体外验证过表达膜定位IL-3的293T细胞外泌体的功能,为在阿尔茨海默病模型动物的体内功能验证奠定基础。方法利用本课题组的专利结构,构建能定位于外泌体膜上的重组IL-3慢病毒载体,包装病毒感染293T细胞,筛选稳定表达细胞株。用流式细胞测量术和免疫荧光技术对IL-3的膜定位进行验证;超滤离心纯化IL-3外泌体,透射电镜观察外泌体形态;纳米流式测量术检测外泌体粒径分布及浓度;Western blot检测IL-3及外泌体相关标志蛋白质表达;免疫荧光技术检测其对小胶质细胞系BV-2吞噬Aβ淀粉样蛋白能力的影响。结果经过载体构建、病毒感染、嘌呤霉素筛选和验证,得到稳定过表达膜定位IL-3的293T细胞株;收集纯化外泌体,在透射电镜下可见直径50~100 nm的双层膜囊泡结构;免疫印迹结果显示CD63、ALIX、TSG101等多种外泌体标志蛋白质检测阳性,且与对照相比富含IL-3,提示IL-3外泌体纯化成功;免疫荧光技术检测结果显示IL-3外泌体能在体外促进BV-2细胞对Aβ淀粉样蛋白的吞噬作用。结论过表达膜定位IL-3的基因修饰293T细胞外泌体在体外兼具IL-3和外泌体的作用,能够促进小胶质细胞的吞噬作用,为阿尔茨海默病的临床治疗提供新的思路。

Role of the STAT3/survivin signaling pathway in the EML4-ALK-positive lung adenocarcinoma cell line H2228 before and after crizotinib-induced resistance

Objective This study investigated the role of the STAT3/survivin signaling pathway in the EML4-ALK- positive lung adenocarcinoma cell line H2228 before and after crizotinib-induced resistance. The mecha- nism of resistance was studied. Methods Cell viability was determined using the MTT assay. Crizotinib-induced apoptosis in H2228 and H2228 crizotinib-resistant cells treated with the indicated doses of crizotinib was measured at different times （24 h, 48 h, 72 h） using flow cytometry. The levels of p-ALK, ALK, p-STAT3, STAT3, and survivin after treatment of cells with 0, 0.3, and 1 pM crizotinib for 72 h were determined using Western blot analysis. DNA sequencing was used to identify mutations in H2228 crizotinib-resistant cells. Results The crizotinib IC50 values in H2228 and H2228 crizotinib-resistant cells at 72 h were 334.5 nM and 3418 nM, respectively. The resistance index of 1-12228 crizotinib-resistant cells was 10.20. Crizotinib induced apoptosis in H2228 cells and reduced the levels of p-ALK, p-STAT3, and survivin. In contrast, no changes in the levels of p-ALK, p-STAT3, and survivin were observed in H2228 crizotinib-resistant cells. The mutations 2067G--,A and 2182G--,C in EML4-ALK were present in the H2228 crizotinib-resistant cells. Conclusion Crizotinib decreased the viability of H2228 cells in a dose- and time-dependent manner. In the STAT3/survivin pathway, downregulation of p-ALK, p-STAT3, and survivin might contribute to crizo- tinib-induced apoptosis in H2228 ceils. However, the STAT3/survivin pathway in H2228 crizotinib-resistant cells was unaffected by crizotinib treatment. Acquired resistance in H2228 cells might be related to ALK mutations.

Comparative Analysis of Protein Expression Concomitant with DNA Methyltransferase 3A Depletion in a Melanoma Cell Line

DNA methyltransferase 3A (Dnmt3a), a de novo methyltransferase, has attracted a great deal of attention for its important role played in tumorigenesis. We have previously demonstrated that melanoma is unable to grow in-vivo in conditions of Dnmt3a depletion in a mouse model. In this study, we cultured the Dnmt3a depletion B16 melanoma (Dnmt3a-D) cell line to conduct a comparative analysis of protein expression con-comitant with Dnmt3a depletion in a melanoma cell line. After two-dimensional separation, by gel electro-phoresis and liquid chromatography, combined with mass spectrometry analysis (1DE-LC-MS/MS), the re-sults demonstrated that 467 proteins were up-regulated and 535 proteins were down-regulated in the Dnmt3a-D cell line compared to the negative control (NC) cell line. The Genome Ontology (GO) and KEGG pathway were used to further analyze the altered proteins. KEGG pathway analysis indicated that the MAPK signaling pathway exhibited a greater alteration in proteins, an interesting finding due to the close relation-ship with tumorigenesis. The results strongly suggested that Dnmt3a potentially controls the process of tu-morigenesis through the regulation of the proteins (JNK1, p38α, ERK1, ERK2, and BRAF) involved in tu-mor-related pathways, such as the MAPK signaling pathway and melanoma pathway.

杂交3倍体泥鳅鳍细胞系染色体组构成研究

通过天然4倍体(4n=100)和2倍体(2n=50)泥鳅杂交创制不同子代杂交组合(4n♀×2n♂、2n♀×4n♂)。以传代20次的杂交3倍体泥鳅鳍细胞系为材料,采用常规冷滴片法制备染色体标本,通过吉姆萨染色确定数目及核型;通过银染法及CMA_3/DA/DAPI三重荧光染色技术对其进行带型分析。结果显示:正反交3倍体鳍细胞系的染色体分裂相数目为3n=75,核型公式15m+6sm+54t,NF=96;正反交3倍体泥鳅鳍细胞系的染色体分裂相中显示有3个银染点,均位于第1组中部着丝粒染色体(M1)短臂的端部区域;正反交3倍体泥鳅鳍细胞的染色体中期分裂相中显示有3个CMA_3荧光信号点,均位于M1区域。研究表明:杂交3倍体泥鳅鳍细胞经细胞培养传代20次后的染色体组成未发生改变,其染色体数目、核型和带型与3倍体泥鳅其他体细胞结果一致。

The establishment of a stable PC-3 cell line overexpressing micro RNA-145

Objective To establish stable prostate cancer bone metastasis cell line overexpressing microRAN-145 (miR-145)for the study of the mechanism of miR-145 in bone metastasis.Methods pMSCV-miR-145 plasmids and retroviruses of pMSCV-vector

上调miRNA-22表达对卵巢癌细胞株SKOV-3侵袭的影响及与VEGF和P53蛋白表达的关系研究

目的研究上调miRNA-22表达对卵巢癌细胞株SKOV-3侵袭的影响及与血管内皮生长因子(VEGF)和P53蛋白表达的关系。方法前瞻性收集新疆维吾尔自治区人民医院的卵巢癌组织标本112例(A组)、卵巢癌旁组织标本85例(B组)及正常卵巢组织标本75例(C组)。采用实时荧光定量PCR法对三组标本中的miRNA-22表达量进行检测。将卵巢癌SKOV-3细胞株分为转染miRNA-22-mimic(转染组)、miRNA-22-NC(空白载体组)及正常对照组。采用实时荧光定量PCR法对各组细胞中的miRNA-22表达量进行测定,通过Transwell小室法对各组细胞的侵袭能力进行检测,并用Western blot法对各组细胞中的P53及VEGF蛋白表达情况进行检测。结果A组miRNA-22表达量较B、C组均明显下降(P<0.05),而B、C组miRNA-22表达量的比较,并无显著差异(P>0.05)。相比正常对照组与空白载体组,转染组细胞中的miRNA-22表达量明显升高(P<0.05),而正常对照组与空白载体组细胞中miRNA-22表达量的比较,无显著差异(P>0.05)。Transwell小室法检测结果发现,转染组卵巢癌SKOV-3细胞株侵袭能力较正常对照组与空白载体组明显减弱(P<0.05),而正常对照组与空白载体组侵袭细胞数的比较,无显著差异(P>0.05)。Western blot法检测结果发现,转染组细胞中P53和VEGF蛋白表达水平较正常对照组与空白载体组明显下降(P<0.05),而正常对照组与空白载体组细胞中P53和VEGF蛋白表达水平的比较,无显著差异(P>0.05)。结论上调miRNA-22表达可起到阻滞卵巢癌SKOV-3细胞株侵袭的作用,其机制可能与P53和VEGF蛋白表达水平下降密切相关。

雷公藤红素调控Hedgehog通路促进人卵巢癌SKOV-3细胞凋亡

目的探讨雷公藤红素(tripterine)对人卵巢癌SKOV-3细胞凋亡的影响及其通过调控Hedgehog通路影响SKOV-3细胞凋亡的机制。方法将实验分为空白对照组,雷公藤红素低剂量(5nmol/L)组、雷公藤红素中剂量(10nmol/L)组、雷公藤红素高剂量(20 nmol/L)组和环巴胺(cyclopamine)抑制剂(5μmol/L)组5组。MTT检测SKOV-3细胞存活率。流式细胞术检测SKOV-3细胞凋亡,Western blot和Real time PCR检测SKOV-3细胞中SHH、PTCH1、Gli1、Gli3、SMO及下游Bcl-2、Caspase-3的蛋白和mRNA表达水平。结果与空白对照组进行比较,雷公藤红素低、中、高剂量组及环巴胺抑制剂组细胞存活率降低,细胞凋亡率升高,SHH、PTCH1、Gli1、SMO、Bcl-2蛋白及其mRNA相对表达量降低,Gli3、Caspase-3蛋白及mRNA相对表达量升高。与雷公藤红素低剂量组比较,雷公藤红素中、高剂量组及环巴胺抑制剂组细胞存活率降低,细胞凋亡率升高,SHH、PTCH1、Gli1、SMO、Bcl-2蛋白及其mRNA相对表达量降低,Gli3、Caspase-3蛋白及m RNA相对表达量升高,雷公藤红素高剂量组上述指标变化程度更明显。结论雷公藤红素通过调控Hedgehog通路及其下游基因的表达促进人卵巢癌SKOV-3细胞凋亡。

HLA-G在卵巢癌细胞株SKOV-3中表达的实验性研究

目的:检测卵巢癌细胞株SKOV-3中人白细胞抗原G(human leucocyte antigen-G,HLA-G)的表达。方法:用逆转录酶聚合酶链式反应(reverse transcriptase-polymerase chain reaction,RT-PCR)、免疫细胞化学法及流式细胞术检测卵巢癌细胞株SKOV-3中HLA-G的表达,以绒毛膜癌细胞株JEG-3中HLA-G的表达为阳性对照。结果:(1)免疫细胞化学显色显示SKOV-3细胞膜及细胞浆内均有HLA-G的表达;(2)RT-PCR结果表明,SKOV-3细胞中有HLA-G mRNA表达;(3)流式细胞术结果提示,SKOV-3细胞中HLA-G阳性率是33.77%。结论:卵巢癌细胞株SKOV-3中HLA-G mRNA及HLA-G蛋白表达为阳性。