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1.
目的 系统研究Caco-2细胞中各药物转运蛋白的mRNA表达水平及转运活力,对比其与人正常肠道中药物转运蛋白表达的差异。方法 实时荧光定量PCR(qRT-PCR)方法测定Caco-2细胞中人肠道相关转运蛋白MDR1、BCRP、MRP2、OATP1A2、OATP2B1和PEPT1的表达水平;将Caco-2细胞接种于Transwell板内培养21 d并给予不同药物转运蛋白的底物及抑制剂,评价Caco-2细胞中相关转运蛋白的转运活性。结果 qRT-PCR结果表明,药物转运蛋白MDR1、MRP2、BCRP和OATP2B1在Caco-2细胞中均有相对高的表达,表达量的顺序为:MDR1 > MRP2 > OATP2B1 > BCRP,在正常人肠道表达量顺序为BCRP > MDR1 > MRP2 > OATP2B1;转运蛋白活力评价表明,各药物转运蛋白的活力测试结果均为阳性,验证了基因的表达水平结果。结论 Caco-2细胞中表达正常人体肠道表达的部分药物转运蛋白(MDR1、MRP2、BCRP和OATP2B1),表达水平与正常人体肠道中大致相当,但也存在一定差异。  相似文献   

2.
郑苏楠  彭维  苏薇薇  程春雷  王永刚 《药学研究》2022,41(10):631-638,649
目的 利用网络药理学方法研究健骨注射液治疗骨质增生及风湿性关节炎的作用机制。方法 采用超快速高效液相色谱串联三重四级杆飞行时间质谱(UFLC-Triple TOF-MS/MS)对健骨注射液的化学成分进行分析,通过中药系统药理数据库与分析平台(TCMSP)、Swiss Target Prediction数据库检索并预测健骨注射液有效成分对应靶点。通过Genecards数据库检索疾病相关靶点。利用cytoscape软件进行网络构建,将潜在作用靶点录入STRING平台构建靶点间的蛋白相互作用(PPI) 网络。采用DAVID数据库对潜在作用靶点进行GO富集分析和KEGG通路富集分析。结果 通过筛选得到15种活性成分,检索并预测得到261个对应靶点。利用在线网站Venny 2.1.0筛选出53个成分和疾病的交集靶点,涉及信号通路包括癌症通路、美洲锥虫病、TNF信号通路、T细胞受体信号通路等。分子对接结果显示,健骨注射液关键成分与核心靶蛋白均能较好结合。结论 本研究发现健骨注射液通过多成分多靶点对疾病进行调控,为后续研究提供了指导意义。  相似文献   

3.
目的 基于网络药理学探讨白仙风汤剂治疗类风湿性关节炎的活性成分,并预测其可能机制。方法 白仙风汤剂中白芍、甘草、青风藤、威灵仙4味草药在TCMSP数据库中检索,经口服吸收率(OB)、类药性、半衰期条件筛选得到药物有效成分,并进行靶点预测;从OMIM、TTD、PharmGKB和GAD数据库对类风湿性关节炎靶点进行检索;使用Cytoscape 3.2.1软件构建药物成分靶点蛋白相互作用网络,对该网络进行拓扑学分析得到核心化学成分及核心靶点;对核心靶点基因进行GO通路分析和KEGG生物过程分析。结果 筛选得到白芍有效成分10个,甘草有效成分66个,青风藤有效成分6个,威灵仙有效成分8个,删除共有的有效成分,共有83个有效活性化合物,对这些化合物进行靶点预测,共得到260个药物靶点;对疾病相关靶点进行检索,共得到58个疾病靶点。通过对药物成分-疾病靶点网络节点的拓扑学分析得到槲皮素、β-谷甾醇、豆甾醇、甘草素等19个核心化学成分,及丝裂原活化蛋白激酶14、雌激素受体、糖皮质激素受体等9个核心靶点,对这些靶点进行通路富集发现药物治疗疾病涉及血管内皮生长因子(VEGF)信号通路、调节脂肪细胞中的脂肪分解、催乳素信号通路、雌激素信号通路、TNF信号通路等11条通路。结论 白仙风汤剂主要通过VEGF信号通路、调节脂肪细胞中的脂肪分解、催乳素信号通路等多条途径实现类风湿性关节炎的治疗作用,表现出多成分、多靶点、多通路的特点,与类风湿关节炎治疗机制相一致。  相似文献   

4.
目的 通过网络药理学及分子对接技术探寻复方一枝蒿颗粒治疗新型冠状病毒肺炎的作用机制。方法 应用TCMSP数据库、BATMAN-TCM数据库及文献收集复方一枝蒿颗粒活性成分及潜在靶点。通过TTD、GeneCards和OMMI数据库检索新型冠状病毒肺炎相关的靶点。将复方一枝蒿颗粒药物靶点和新型冠状病毒肺炎相关基因取交集,使用String数据库构建靶蛋白相互作用(PPI)网络。通过Cytoscape构建“药物–活性成分–靶点基因–疾病”网络。对交集靶点进行GO功能、KEGG通路富集分析。利用Autodock_vina软件对活性成分和靶点进行分子对接。结果 共筛选92个活性成分,1 627个靶点,新型冠状病毒肺炎疾病靶点464个,两者取交集筛选出87个潜在靶点。GO功能富集得到2 040个条目(P<0.05),与病毒过程、参与共生相互作用的生物过程、活性氧代谢过程的调节、与宿主相互作用的生物过程、病毒生命周期、炎症反应的调节等生物学过程有关。KEGG通路分析共得到150条通路,与新冠肺炎密切相关的有人巨细胞病毒感染、结核、COVID-19、IL-17信号通路等。分子对接结果证实,筛选的靶点受体蛋白与活性成分可以较好地结合。结论 复方一枝蒿颗粒可通过多组分、多靶点和多途径的方式对新型冠状病毒肺炎产生治疗作用。  相似文献   

5.
目的 探究当归芍药散防治阿尔茨海默病的作用机制。方法 选取当归芍药散中的当归、白芍、白术、川芎、茯苓、泽泻为研究对象,应用TCMSP数据库对6味中药主要化学成分进行筛选;使用TCMSP数据库,对筛选出的化合物及阿尔茨海默病进行靶点预测,选取当归芍药散与阿茨海默病一致的6个靶点蛋白作为后续研究对象,通过生物分子功能注释系统(MAS 3.0)及KEGG通路数据库进行通路注解及分析,得到当归芍药散治疗阿茨海默病的相关靶点通路预测图及相关信号通路。结果 从当归芍药散中筛选出35个化合物,可作用于阿尔茨海默病6个潜在的蛋白靶点,找出靶点的相关通路22条。作用通路涉及阿尔茨海默病发病机制相关的钙信号途径、炎症、免疫调节、细胞与细胞之间的信号交流、肌动蛋白细胞骨架的调节等各个环节,6味中药既有共同的成分及作用靶点、通路,又各有偏重,各通路间通过共有靶点连接,显示出不同成分间的多靶点、多途径的协同作用。结论 预测出当归芍药散治疗阿尔茨海默病可能与其调节炎症、免疫系统、钙信号、细胞与细胞之间的信号交流等机制有关。  相似文献   

6.
目的 应用网络药理学的研究方法探索中药复方参麻颈复颗粒治疗脑梗死的物质基础及其作用机制。方法 通过TCMSP数据库、ETCM数据库、中医药资料库检索参麻颈复颗粒中潜在活性成分及作用靶点;OMIM数据库检索脑梗死相关靶蛋白基因,采用交集法获得参麻颈复颗粒与脑梗死的共同靶点基因。运用Cytoscape 构建“参麻颈复活性成分-靶点”网络,利用STRING 数据库构建PPI网络,采用DAVID数据库进行GO和KEGG 富集分析。结果 筛选出参麻颈复颗粒的183个潜在有效成分,在TCMSP数据库中筛选到1785个潜在靶点蛋白,其中与脑梗死有关的作用靶点 30个,这些靶点基因主要参与炎症反应和细胞凋亡过程,涉及TNF信号通路、HIF-1信号通路、NF-κB信号通路等。结论 参麻颈复颗粒对脑梗死的治疗作用可能与调控炎症反应、改善受损神经功能、保护脑缺血再灌注损伤有关。  相似文献   

7.
目的 通过网路药理学和分子对接探讨葛根调控溃疡性结肠炎的作用机制。方法 通过TCMSP数据库、Uniprot数据库检索葛根有效成分及靶点,通过OMIM、DisGeNET、DrugBank及GeneCards数据库检索溃疡性结肠炎的靶点。采用Cytoscape 3.8.2软件构建"药物-成分-靶点-疾病"关系网络,并将葛根调控溃疡性结肠炎的相关靶点基因导入String数据库构建蛋白互作(PPI)网络。通过Metascape数据库进行基因本体论(GO)和京都基因和基因组百科全书(KEGG)基因富集分析,得到葛根调控溃疡性结肠炎的潜在作用通路,再通过分子对接验证活性成分与核心靶点的结合能力。结果 从葛根中筛选出5个潜在的活性成分,共有60个靶点作用于溃疡性结肠炎,葛根成分靶点中拓扑分析和通路富集分析发现葛根可通过炎症相关靶点及作用通路发挥治疗溃疡性结肠炎的作用;分子对接结果显示,葛根素和刺芒柄花素与关键靶点蛋白(PTGS2、JUN、TNF、STAT3、PTGS2、JUN)的结合能力较强。结论 葛根调控溃疡性结肠炎具有可行性,可与其他药物配伍治疗溃疡性结肠炎。  相似文献   

8.
高丛  窦明金  隋继英 《药学研究》2022,41(8):501-506,520
目的 探讨参麦注射液缓解化疗所致周围神经毒性(CIPN)的作用机制。方法 借助ETCM及TCMSP检索红参及麦冬的化学成分和作用靶点,通过OMIM、Disgenet、GeneCards等多个数据库查询与CIPN相关的基因。运用Cytoscape软件构建化合物-靶点网络,并利用String工具获得PPI网络筛选出核心靶点,最后通过Metascape对PPICN的靶蛋白进行基因富集分析。结果 参麦-靶点网络包含38个化合物和相应靶点105个;PPI核心网络包含23个蛋白;GO分析得到条目34个,KEGG通路富集筛选得到9条信号通路(P<0.01)。结论 参麦注射液中对CIPN关键活性成分源自麦冬的组分占比60%;GO富集分析与KEGG通路分析结果显示参麦注射液通过多靶点与多通路的协同作用缓解CIPN。  相似文献   

9.
目的 探讨固公果根提取物促进结肠癌细胞凋亡及机制研究。方法 分别采用MTT法、DAPI染色及流式细胞术检测固公果根提取物对结肠癌细胞增殖活性及细胞凋亡的影响;蛋白免疫印迹(Western-Blot)法检测凋亡相关蛋白的活性表达水平。结果 固公果根提取物能显著抑制结肠癌SW620和LOVO细胞增殖,促进两种结肠癌细胞凋亡,上调凋亡相关基因Keap-1、Bax的蛋白表达,下调Nrf2、HO-1以及Bcl2蛋白的表达。结论 固公果根提取物能显著抑制人结肠癌细胞SW620和LOVO增殖、诱导细胞凋亡,其作用机制可能涉及调控凋亡相关基因Bax、Bcl-2表达,且与激活Nrf2氧化应激通路有关。  相似文献   

10.
目的 基于网络药理学探究胃复方治疗胃癌的作用机制。方法 应用中药系统药理学数据库及分析平台、DrugBank、GeneCards等数据库检索胃复方所含12味中药的有效化学成分及治疗胃癌的潜在靶点,将潜在靶点导入DAVID数据库进行基因本体论(GO)及京都基因与基因组百科全书(KEGG)分析,筛选出潜在的生物过程和涉及的信号通路。采用CCK-8及Western blotting对KEGG分析富集程度最大的信号通路进行验证。结果 胃复方治疗胃癌可能涉及以槲皮素、木樨草素为代表的88种有效活性成分,可能作用于以TP53、STAT3、Akt为代表的194个靶点。GO分析涉及148个生物过程,KEGG分析筛选出PI3K/Akt、TNF、HIF-1等信号通路。体外实验证实胃复方提取物可抑制人胃癌细胞HGC-27增殖,降低其p-PI3K、PI3K、p-Akt、Akt蛋白表达水平;而对于人正常胃黏膜上皮细胞GES-1,胃复方提取物可促进其增殖,上调其p-PI3K、PI3K、p-Akt、Akt蛋白表达。结论 本研究初步预测了胃复方治疗胃癌“中药-多成分-多靶点-多通路”的调控网络,并验证了胃复方提取物可能通过抑制PI3K/Akt信号通路相关蛋白的表达发挥抑制胃癌细胞增殖的作用,证明了网络药理学技术挖掘胃复方具有一定的可信度,但同时兼有不全面性,为进一步探索胃复方的作用机制奠定了基础。  相似文献   

11.
Purpose. The mRNA levels of MDR1 (P-glycoprotein), multidrug resistance-associated proteins (MRP1, MRP2), cytochrome P450 3A (CYP3A) and villin in human colorectal cell lines (HCT-15, LoVo, DLD-1, HCT-116 and SW620) were quantitatively compared with those in Caco-2 cells. Methods. The mRNA levels were determined by real time quantitative polymerase chain reaction and expressed as the relative concentrations of MDR1 mRNA to glyceraldehyde-3-phosphate dehydrogenase (GAPDH) mRNA. Results. MDR1 mRNA was expressed in HCT-15 LoVo and DLD-1 cells at similar or lower level to Caco-2. The expression of MRP1 mRNA in the cell lines tested was comparable with Caco-2. MRP2 mRNA was detected only in HCT-116 and SW620 at significantly lower level than Caco-2. CYP3A mRNA was detected in HCT-15, LoVo, DLD-1 and SW620 at similar level to Caco-2. Conclusions. HCT-15 LoVo and DLD-1 cells express proteins important for regulating the intestinal absorption of drugs, i.e., MDR1, MRP1 and CYP3A, whereas HCT-116 and SW620 cells were not acceptable for evaluation of absorption properties of drug candidates.  相似文献   

12.
Purpose. Secretory systems contribute to drug absorption in the gastrointestinal tract. The purpose of this study was the identification of members of the ATP binding cassette superfamily of secretory transport proteins that may potentially modulate drug absorption in Caco-2 cells, which are an important cellular model predicting enteral absorption of drugs. Methods. Kinetic studies as well as PCR- and Western blot studies with confluent epithelial layers of human Caco-2 cells. Results. The study demonstrates functional expression of multidrug resistance related protein (MRP) and P-glycoprotein (P-gp) in Caco-2 cells: 1) Efflux studies with the MRP specific substrate glutathion-methylfluorescein (GS-MF) showed functional activity of MRP in Caco-2 cells preloaded with the metabolic precursor of GS-MF, chloro-methylfluoresceine-diacetate, CMFDA. Excretion of GS-MF was decreased in presence of the MRP-blocker MK-571.2) Transport experiments with cyclosporin A demonstrated the functional activity of P-gp. Cellular accumulation was increased in presence of the P-gp blocking agent SDZ-PSC 833.3) The expression of the 190 kDa protein MRP and the 170 kDa protein P-gp in Caco-2 cells was shown by Western blot analysis with specific monoclonal antibodies. 4) The expression of MRP-mRNA in Caco-2 cells was detected by RT-PCR and compared with the MRP over-expressing cell line H69AR. MRP primers recognize specifically human MRP1 (GenBank accession number L05628), but not all other published sequences of MRP (MRP2-MRP6). P-gp expression on mRNA-level was also confirmed by RT-PCR. Conclusions. The data demonstrate that besides P-gp, multidrug resistance related protein (MRP) is functionally expressed in Caco-2 cells and contributes to the active excretion of substrates in this cell line.  相似文献   

13.
Purpose. To compare gene expression profiles and drug permeability differences in Caco-2 cell culture and human duodenum. Methods. Gene expression profiles in Caco-2 cells and human duodenum were determined by GeneChip® analysis. In vivo drug permeability measurements were obtained through single-pass intestinal perfusion in human subjects, and correlated with in vitro Caco-2 transport permeability. Results. GeneChip® analysis determined that 37, 47, and 44 percent of the 12,559 gene sequences were expressed in 4-day and16-day Caco-2 cells and human duodenum, respectively. Comparing human duodenum with Caco-2 cells, more than 1000 sequences were determined to have at least a 5-fold difference in expression. There were 26, 38, and 44 percent of the 443 transporters, channels, and metabolizing enzymes detected in 4-day, 16-day Caco-2 cells, and human duodenum, respectively. More than 70 transporters and metabolizing enzymes exhibited at least a 3-fold difference. The overall coefficient of variability of the 10 human duodenal samples for all expressed sequences was 31% (range 3% to 294%) while that of the expressed transporters and metabolizing enzymes was 33% (range 3% to 87%). The in vivo / in vitro drug permeability measurements correlated well for passively absorbed drugs (R2 = 85%). The permeability correlation for carrier-mediated drugs showed 3- 35-fold higher in human above the correlation of passively absorbed drugs. The 2- 595-fold differences in gene expression levels between the Caco-2 cells and human duodenum correlated with the observed 3- 35-fold difference in permeability correlation between carrier-mediated drugs and passively absorbed drugs. Conclusions. Significant differences in gene expression levels in Caco-2 cells and human duodenum were observed. The observed differences of gene expression levels were consistent with observed differences in carrier mediated drug permeabilities. Gene expression profiling is a valuable new tool for investigating in vitro and in vivo permeability correlation.  相似文献   

14.
Purpose. Studies were conducted to evaluate whether the use of an in vitro model of the blood-brain barrier (BBB) resulted in more accurate predictions of the in vivo transport of compounds compared to the use of a human intestinal cell line (Caco-2). Methods. The in vitro BBB model employs bovine brain capillary endothelial cells co-cultured with primary rat astrocytes. The Caco-2 cells originate from a human colorectal carcinoma. The rat was used as experimental animal for the in vivo studies. Results. Strong correlations (r = 0.93-0.95) were found between the results generated by the in vitro model of the BBB and two different methodologies to measure the permeability across the BBB in vivo. In contrast, a poor correlation (r = 0.68) was obtained between Caco-2 cell data and in vivo BBB transport. A relatively poor correlation (r = 0.74) was also found between the two in vitro models. Conclusion. The present study illustrates the limitations of the Caco-2 model to predict BBB permeability of compounds in vivo. The results emphasize the fact that the BBB and the intestinal mucosa are two fundamentally different biologic barriers, and to be able to make accurate predictions about the in vivo CNS penetration of potential drug candidates, it is important that the in vitro model possesses the main characteristics of the in vivo BBB.  相似文献   

15.
Background and aimsInflammatory bowel disease (IBD) are the major risk factor for developing colitis associated cancer (CAC). Previously, we have reported that Phosphoinositide-3-kinase regulatory subunit 3 (PIK3R3) was overexpressed in colorectal cancer (CRC), but we don't know the role of PIK3R3 in IBD.MethodsWe investigated the differential expression of PIK3R3 and ZO-1 in IBD patients by using Immunohistochemical (IHC) and Gene Expression Omnibus (GEO) database analysis. Caco-2 cells were exposed to different conditions to assess protein level changes of PIK3R3 and ZO-1. Caco-2 cell monolayers were transfected with PIK3R3/siPIK3R3 to assess transepithelial electrical resistance. Tight junction protein integrity was assessed by immunoblot and immunofluorescence. For further, intestinal permeability and tight junction protein integrity were assessed in animal study to assess the treatment role of PIK3R3 specific inhibitor TAT-N 15 (N15).ResultsPIK3R3 was increased in IBD patients, and negatively controlled the expression of ZO-1. In vitro, PIK3R3 regulates ZO-1 by activating NF-kB pathway. Overexpression of PIK3R3 in Caco-2 cells decreased transepithelial electrical resistance (TEER), an opposite result was observed in siPIK3R3 cells. In animal study, inhibition of PIK3R3 by N15 contributed to amelioration of DSS-induced intestinal permeability. Mice treated with N15 exhibited less disruption of TJs in colon tissues.ConclusionsPIK3R3 was increased in clinical IBD patients with accompanying disruption of ZO-1 expression. Inhibition of PIK3R3 attenuated DSS-induced IBD symptoms in a mouse model. These findings indicated that PIK3R3 could be a therapeutic target for IBD.  相似文献   

16.
Purpose. To investigate the effects of passaging on the intrinsic membrane transport parameters of compounds absorbed by means of passive and carrier-mediated processes in the Caco-2 cell line. Methods. Caco-2 cells at low (28–36) and high (93–108) passage numbers were used to evaluate the transport characteristics of model compounds for paracellular diffusion (mannitol), transcellular diffusion (progesterone) and carrier-mediated transport (cephalexin, cephradine, phenylalanine, proline, and taurocholic acid) using side-by-side diffusion chambers. Intrinsic intestinal transport parameters were determined by correcting the effective permeability for potential biases introduced by the microporous filter and aqueous boundary layer. Intrinsic maximal flux (J max, Michaelis constant (K m) and carrier permeability (P c) were determined as a function of passage number. Results. Compared to the low passaged cells, the high passaged Caco-2 cells were characterized by less morphological heterogeneity, higher transepithelial electrical resistance, higher transcellular diffusion, lower paracellular diffusion, lower carrier-mediated transport and lower alkaline phosphatase activity. The use of effective transport parameters overestimated the K m and underestimated P c but had no effect on J max. Conclusions. The current results provide experimental evidence that the passaging process significantly affects the biological characteristics and transport properties of Caco-2 cell monolayers. The effects are consistent with a reduction in the functional expression of a brush border enzyme and several transport proteins as passage number is increased. The underlying basis for this appears to be a selection of fast-growing subpopulations from the original heterogeneous Caco-2 cell line during passaging.  相似文献   

17.
Purpose. The purpose of this work was to study the influence of cell differentiation on the mRNA expression of transporters and channels in Caco-2 cells and to assess Caco-2 cells as a model for carrier-mediated drug transport in the intestines. Method. Gene mRNA expression was measured using a custom-designed microarray chip with 750 deoxyoligonucleotide probes (70mers). Each oligomer was printed four times on poly-lysine-coated glass slides. Expression profiles were expressed as ratio values between fluorescence intensities of Cy3 and Cy5 dye-labeled cDNA derived from poly(A) + RNA samples of Caco-2 cells and total RNA of human intestines. Results. Significant differences in the mRNA expression profile of transporters and channels were observed upon differentiation of Caco-2 cells from 5 days to 2 weeks in culture, including changes for MAT8, S-protein, and Nramp2. Comparing Caco-2 cells of different passage number revealed few changes in mRNAs except for GLUT3, which was down-regulated 2.4-fold within 13 passage numbers. Caco-2 cells had a similar expression profile when either cultured in flasks or on filters but differed more strongly from human small and large intestine, regardless of the differentiation state of Caco-2 cells. Expression of several genes highly transcribed in small or large intestines differed fourfold or more in Caco-2 cells. Conclusions. Although Caco-2 cells have proven a suitable model for studying carrier-mediated transport in human intestines, the expression of specific transporter and ion channel genes may differ substantially.  相似文献   

18.
孙宇  雍翔  孙祝  尹群  赵玉魁 《安徽医药》2018,39(5):533-536
目的 探讨肺鳞癌组织中胰岛素样生长因子1(IGF-1)和趋化因子20(CCL20)的表达与患者临床病理特征及预后的相关性。方法 选取2014年2月至2015年2月皖北煤电集团总医院收治的肺鳞癌患者30例,采用免疫组织化学染色法检测患者肺鳞癌组织中IGF-1和CCL20蛋白的表达,通过单因素分析IGF-1和CCL20蛋白与患者临床病理特征的相关性;采用单因素和多因素Cox比例风险模型分析其对患者预后的关系。结果 30例肺鳞癌患者中,18例(60.00%)患者IGF-1蛋白呈阳性表达,且与患者TNM分期及淋巴结转移有关(P<0.05);23例(76.67%)患者CCL20呈阳性表达,且与患者淋巴结转移、浸润深度、TNM分期有关(P<0.05)。经单因素和多因素Cox比例风险模型分析,浸润深度、淋巴结转移、TNM分期、IGF-1、CCL20阳性表达是影响肺鳞癌患者3年生存期的独立危险因素(P<0.05)。结论 IGF-1及CCL20高表达与肺鳞癌的侵袭转移密切相关,可作为判定肺鳞癌患者预后的指标之一。  相似文献   

19.
目的 探讨大肠癌组织中MYC启动子结合蛋白1(MBP-1)的表达与临床病理学特征的关系,分析MBP-1蛋白和C-myc、基质金属蛋白酶9(MMP-9)表达的相互关系。方法 应用免疫组织化学法检测84例大肠癌组织和40例大肠腺瘤组织中MBP-1、C-myc、MMP-9的表达情况,并从84例大肠癌患者中取40例癌旁组织作为对照。结果 大肠癌组织中MBP-1阴性表达率高于腺瘤组织和癌旁对照组织(P<0.05),表达强度也低于腺瘤组织和癌旁对照组织(P<0.05);腺瘤组织中MBP-1阳性表达率和表达强度与癌旁对照组织相比差异无统计学意义(P>0.05)。大肠癌组织中C-myc阳性表达率和表达强度高于癌旁对照组织(P<0.05);大肠癌组织中MMP-9蛋白阳性表达率(58.3%)高于癌旁对照组织(12.5%),差异有统计学意义(P<0.05)。MBP-1表达和C-myc表达呈负相关,与MMP-9表达无相关性。TNM分期低、有淋巴结转移的组织MBP-1表达强度低于TNM分期高、无淋巴结转移的组织(P<0.05)。结论 MBP-1、C-myc和MMP-9可能共同参与了大肠癌的发生发展。  相似文献   

20.
目的 探究氟尿嘧啶(5-FU)对结直肠癌RKO细胞SHP2基因表达的影响。方法 培养对数生长期的人结直肠癌细胞RKO,5-FU处理48 h后,采用免疫荧光和Western免疫印迹观察SHP2的蛋白表达水平;将能够特异性抑制SHP2表达的siRNA(siSHP2)转染RKO细胞,5-FU处理48 h,CCK8测定细胞吸光度(A)值,流式检测细胞凋亡,观察RKO对5-FU的敏感性变化及5-FU诱导细胞凋亡的影响。结果 结直肠癌细胞RKO在5-FU处理48 h后,其细胞核中SHP2的蛋白表达水平明显增高;siSHP2转染后,RKO细胞对5-FU的敏感性降低,且降低了5-FU诱导的细胞凋亡率。结论 5-FU可能通过影响SHP2的表达,促进RKO细胞的凋亡,发挥抑癌作用。  相似文献   

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