简介：摘要目的通过采集肿瘤患者放疗前后外周血，探讨照射对人外周血血清miR-150-5p、miR-23a-3p表达的影响，以期为寻找辐射生物标志物提供科学依据。方法以2021年10月至2022年3月63例行放疗的肿瘤患者为研究对象，采用实时荧光定量PCR(qPCR)方法，检测患者放疗前后外周血血清miR-150-5p与miR-23a-3p的相对表达水平。比较两种miRNAs放疗前后在患者外周血血清中的差异表达变化，分析其与肿瘤类型等因素的关系。结果放疗后，患者外周血血清miR-150-5p与miR-23a-3p的相对表达量明显低于放疗前(t＝4.97，Z＝－2.77，P<0.05)。不同的肿瘤类型中，乳腺癌、食管癌和其他消化道肿瘤患者放疗后miR-150-5p的相对表达量降低(t＝3.47、2.47、2.87，P<0.05)，消化道肿瘤患者放疗后miR-23a-3p相对表达量下降(Z＝－1.99，P<0.05)。在放疗前、后miR-150-5p的表达改变均不受性别、年龄、化疗和肿瘤类型等因素影响(P>0.05)，而miR-23a-3p的表达改变在放疗后受性别、年龄和化疗等因素影响(t＝2.04、－3.34、－2.29，P<0.05)。结论放疗可影响肿瘤患者血清中miR-150-5p的表达，其有作为辐射生物学标志物的潜力。

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简介：摘要目的阐释miR-340-5p对HBV复制的影响及其调控机制，并为HBV感染后的生物标志物和治疗用药提供新的策略。方法在肝癌细胞HepG2.2.15中转染miR-340-5p的模拟物(340-mimic)和抑制剂(340-inhibitor)及其对应的阴性对照。通过ELISA检测上清中HBeAg和HBsAg的水平变化。同时收取细胞，提取RNA和壳体化DNA，并采用qRT-PCR分别检测HBV总RNA和pgRNA的水平及HBV DNA拷贝数的变化；分子克隆构建STAT3的过表达质粒pEF-flag-stat3，通过qRT-PCR和western blot对STAT3的mRNA和蛋白表达加以验证；此外，共转染miR-340-5p的模拟物和pEF-flag-stat3后通过northern blot，qPCR和ELISA对HBV的复制情况进行检测。结果miR-340-5p过表达后，HBV转录生成总RNA和逆转录模板pgRNA的水平明显下降至对照组的45.89%、61.46% (P＝0.001、P＝0.003)；壳体化DNA的合成及HBeAg和HBsAg的分泌水平分别受到72.46%、18.27%、14.42%的抑制( P<0. 001、P<0. 001、P＝0.005)；干扰内源性miR-340-5p则与对照组相比分别增加44.02%、45.56%、22.66%、11.85%、14.04%(P＝0. 009、P＝0. 01、P＝0. 011、P＝0.013、P＝0.027)。相比之下在此基础上过表达信号转导和转录激活因子(STAT)3能够减弱被miR-340-5p抑制的HBV复制。进一步的实验结果也表明STAT3对HBV的复制有促进作用。结论miR-340-5p能够通过靶向作用于STAT3抑制其转录和翻译进而抑制HBV的复制。

简介：摘要：2P5E教学模式，该模式是一种以学生为本的教学模式，结合了探究教学和问题导向的方式，力求提高课堂效率。本文首先介绍了2P5E教学模式，然后在此基础上将该模式与中学物理课堂相结合，并提出了一些可行的实施策略。本文将该模式的几个主要环节进行说明，从几个方面探索了2P5E模式的如何运用在中学物理课堂的方式。在每个策略之后，都列举了可行的例子，并对中学物理教学提出了一些实施建议。

简介：AbstractObjective:The objective of this study was to investigate the expression levels of microRNA-141-5p(miRNA-141-5p), MAPK1 and neutrophil elastase in patients with and without preeclampsia (PE), and the relationship between miRNA-141-5p and MAPK1 with respect to the secretion of elastase by neutrophils in patients with PE.Methods:Thirty patients with PE and 30 healthy pregnant (HP) women were recruited from The Second Hospital of Shanxi Medical University, Taiyuan, China, between February 2017 and July 2018. Neutrophils were isolated from 8 mL peripheral blood samples and cultured. We recorded neutrophil count and morphology during culture. Apoptosis was detected by flow cytometry in different groups at 0, 24, and 48 h. The expression levels of elastase were detected in neutrophils by enzyme-linked immunosorbent assay, whereas the expression levels of miRNA-141-5p in peripheral blood neutrophils were detected by real-time polymerase chain reaction. We used TargetScanHuman Release 7.2 to analyze the target genes of miRNA-141-5p. The expression of MAPK1 in peripheral blood neutrophils was detected by western blotting. Data were analyzed by SPSS version 21.0 software, and comparisons between groups were carried out with the Student t test.Results:There was no significant difference between the PE and HP groups (P > 0.050) with regard to age or body mass index. The weight of newborns in the PE group (2846.00 ± 600.00 g) was significantly lower than that in the HP group (3055.00 ± 230.68 g). The number of neutrophilic granulocytes(NGs) in blood samples from the PE group was significantly higher than that in the HP group (P = 0.003). There was no significant difference between the groups with regard to morphology. Apoptosis in the PE group was delayed when compared with the HP group at different time points. The P value of apoptosis in the PE and HP groups were respectively 0.790, < 0.001 and 0.030 at 0 h, 24 h and 48 h. The expression levels of miRNA-141-5p in the PE group were significantly lower than those in the HP group (P < 0.050). The expression levels of MAPK1 in neutrophils from the PE group were significantly higher than those in the HP group (P < 0.050) by western blot. The expression levels of elastase in neutrophils from the PE group were significantly higher than those in the HP group (P < 0.050). Furthermore, the number of NGs in peripheral blood from the PE group was higher than that of the HP group; however, the levels of apoptosis were lower. The expression levels of miRNA-141-5p in NGs decreased, the expression of MAPK1 increased, and the secretion of neutrophil elastase in the NG medium increased in the PE group than those in the HP group.Conclusion:Collectively, our analysis suggested that miRNA-141-5p may be involved in the pathogenesis of PE by regulating the MAPK1 signaling pathway to activate neutrophils and increase the secretion of elastase.

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简介：摘要目的探讨脂多糖（LPS）促进肠道L细胞miR-425-5p表达的机制。方法将肠道L细胞系GLUTag细胞分为对照（NC）组、LPS组（LPS 200 ng/ml培养24 h）、小干扰RNA（siRNA）NC组（LPS 200 ng/ml培养24 h后转染siRNA NC）和NF-κB siRNA组［LPS 200 ng/ml培养24 h后转染核因子-κB（NF-κB）siRNA］，每组3个复孔。采用Western blotting检测细胞核及细胞质中NF-κB p65蛋白表达水平，实时荧光定量聚合酶链反应检测miR-425-5p表达水平，酶联免疫吸附测定法检测胰高糖素样肽-1（GLP-1）的分泌水平。采用Promo软件分析预测miR-425-5p启动子上NF-κB的潜在结合位点，双荧光素酶报告实验检测miR-425-5p启动子区域结合位点的相对活性，染色质免疫沉淀反应验证NF-κB与miR-425-5p之间的相互作用。两组之间比较采用独立样本t检验，多组之间比较采用单因素方差分析。结果与对照组相比，LPS组的GLP-1分泌水平显著下降（P<0.01），miR-425-5p表达水平显著升高（P<0.01）、细胞质和细胞核中NF-κB p65蛋白表达水平显著升高（P<0.05）。与siRNA NC组相比，NF-κB siRNA组细胞核及细胞质中NF-κB p65的蛋白表达水平、miR-425-5p表达水平均明显下降（P<0.01）。LPS诱导下，含有两个结合位点（2-Luc/3-Luc）的miR-425-5p启动子活性明显高于含有单独的结合位点（3-Luc），差异具有统计学意义（P<0.01）；NF-κB与miR-425-5p基因启动子序列结合位点2的结合能力最强（P<0.01）。结论LPS通过活化NF-κB，促进其与miR-425-5p基因启动子序列的结合位点2结合，进而促进肠道L细胞miR-425-5p转录，最终调节肠道L细胞GLP-1分泌。

简介：【摘要】目的 探究miR-129-5p通过调控神经纤毛蛋白1（NRP1）影响胃癌的侵袭机制及增殖机制。方法 收集2022年1月~2022年6月在我院进行胃癌根治性切除手术患者（52例）的胃癌组织与癌旁组织样本。向对数期BGC-823细胞系转染miR-129-5p模拟物、抑制剂与阴性对照序列，分别纳入模拟物组、抑制剂组与阴性对照组，检测各组细胞的增殖与侵袭能力。检测患者样本组织中miR-129-5p与NRP1在胃癌组织和癌旁组织中的表达差异，分析两者表达量的相关性。结果 增殖能力与侵袭能力均为抑制组高于模拟物组与阴性对照组，阴性对照组高于模拟物组，且3组具有统计学差异（P＜0.05）。胃癌组织的miR-129-5p、NRP1表达量分别低于、高于胃旁组织（P＜0.05），miR-129-5p表达量与NRP1表达量呈负相关（P＜0.05）。结论 miR-129-5p具有抑制胃癌细胞侵袭与增殖能力的作用，与NRP1表达的调控呈负相关。

简介：摘要目的观察脂多糖(LPS)作用下人腹膜间皮细胞(PMCs)表达细胞周期蛋白依赖性激酶5(Cdk5)及其协同激活蛋白p25/p35以及对炎症介质分泌的影响。方法体外培养人腹膜间皮细胞株(HMrSV5)，以293T细胞作为阳性对照。在不同浓度LPS作用6 h及LPS(1 μg/mL)作用不同时间点收集细胞。LPS(1 μg/mL)或不同浓度1NMPP1(一种Cdk5信号通路抑制剂)预处理2 h后再加LPS，作用6 h后收集细胞培养上清。用实时定量PCR检测Cdk5 mRNA的表达，用蛋白质印迹和免疫荧光检测Cdk5以及p25/p35的表达，用ELISA检测肿瘤坏死因子α(TNF-α)和白细胞介素1β(IL-1β)的分泌。结果Cdk5及其共激活物p25/p35蛋白在HPMCs中均表达。免疫荧光分析显示Cdk5主要分布在HPMCs的胞浆中。LPS(1 μg/mL或2 μg/mL)处理6 h后，HPMCs中Cdk5的表达显著上调。LPS处理后Cdk5的蛋白表达呈浓度和时间依赖性增加，峰值为1 μg/mL和6 h。LPS处理可诱导HPMCs分泌大量细胞因子TNF-α和IL-1β，而随着浓度增加的1NMPP1，可显著降低TNF-α和IL-1β的分泌(P<0.05)。结论Cdk5信号通路可能参与LPS诱导的腹腔分泌TNF-α和IL-1β等炎症介质。

简介：AbstractBackground:Gene promoter methylation is a major epigenetic change in cancers, which plays critical roles in carcinogenesis. As a crucial regulator in the early stages of B-cell differentiation and embryonic neurodevelopment, the paired box 5 (PAX5) gene is downregulated by methylation in several kinds of tumors and the role of this downregulation in esophageal squamous cell carcinoma (ESCC) pathogenesis remains unclear.Methods:To elucidate the role of PAX5 in ESCC, eight ESCC cell lines, 51 primary ESCC tissue samples, and eight normal esophageal mucosa samples were studied and The Cancer Genome Atlas (TCGA) was queried. PAX5 expression was examined by reverse transcription-polymerase chain reaction and western blotting. Cell apoptosis, proliferation, and chemosensitivity were detected by flow cytometry, colony formation assays, and 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide assays in ESCC cell lines with PAX5 overexpression or silencing. Tumor xenograft models were established for in vivo verification.Results:PAX5 methylation was found in 37.3% (19/51) of primary ESCC samples, which was significantly associated with age (P = 0.007) and tumor-node-metastasis stage (P = 0.014). TCGA data analysis indicated that PAX5 expression was inversely correlated with promoter region methylation (r = -0.189, P = 0.011 for cg00464519 and r = -0.228, P = 0.002 for cg02538199). Restoration of PAX5 expression suppressed cell proliferation, promoted apoptosis, and inhibited tumor growth of ESCC cell lines, which was verified in xenografted mice. Ectopic PAX5 expression significantly increased p53 reporter luciferase activity and increased p53 messenger RNA and protein levels. A direct interaction of PAX5 with the p53 promoter region was confirmed by chromatin immunoprecipitation assays. Re-expression of PAX5 sensitized ESCC cell lines KYSE150 and KYSE30 to fluorouracil and docetaxel. Silencing of PAX5 induced resistance of KYSE450 cells to these drugs.Conclusions:As a tumor suppressor gene regulated by promoter region methylation in human ESCC, PAX5 inhibits proliferation, promotes apoptosis, and induces activation of p53 signaling. PAX5 may serve as a chemosensitive marker of ESCC.

简介：摘要目的探讨miR-485-5p通过PI3K/Akt-PAK1信号通路对结肠癌细胞顺铂耐药的影响。方法构建LoVo/DDP细胞株，将建LoVo/DDP细胞株分为NC组(未做转染处理)、miR-485-5p mimics组(转染miR-485-5p mimics)、miR-485-5p inhibitors组(转染miR-485-5p inhibitors)、IPA-3组(采用IPA-3干预)和miR-485-5p mimics+IPA-3组(采用miR-485-5p mimics和IPA-3转染和干预)，均给予0、3和5 μmol/L顺铂处理。结果20例患者中，miR-485-5p阴性为85.0%(17/20)，阳性为15.0%(3/20)；PAK1阴性为20.0%(4/20)，阳性为80.0%(16/20)，miR-485-5p在结肠癌组织中的表达低于癌旁组织中的表达(P<0.05)；人结肠癌细胞系LoVo、SW620、HCT116、SW480中miR-485-5p表达均低于正常肠黏膜细胞(P<0.05)；LoVo/DDP中的miR-485-5p表达明显低于LoVo(P<0.001)；在3 μmol/L和5 μmol/L顺铂的作用下，LoVo/DDP细胞活力高于LoVo(P<0.001)，凋亡率低于LoVo(P<0.001)；miR-485-5p mimics组中细胞存活率低于miR-485-5p inhibitors组(P<0.001)；与Mimics NC组相比，过表达miR-485-5p显著下调野生型PAK1报告基因的荧光素酶活性(P<0.001)；miR-485-5p mimics组中的P-PI3k、P-Akt、PAK1水平均显著低于miR-485-5p inhibitors组(P<0.001)；miR-485-5p mimics组、IPA-3组、miR-485-5p mimics+IPA-3组中细胞存活率明显低于NC组(P<0.001)，miR-485-5p mimics+IPA-3组中细胞存活率较miR-485-5p mimics组相比显著降低(P<0.001)。结论上调miR-485-5p通过PI3K/Akt-PAK1信号通路逆转结肠癌顺铂耐药，提示过表达miR-485-5p或者抑制PI3K/Akt-PAK1信号通路可以改变结肠癌顺铂治疗中的顺铂疗效。

简介：AbstractBackground:MicroRNA-20a (miR-20a) is dysregulated in many types of malignancies, including human hepatocellular carcinoma (HCC), but its expression level and functional significance in HCC are still disputed. We aimed to study the role of miR-20a-5p in HCC and its downstream molecular mechanisms.Methods:We used real-time polymerase chain reaction to detect the expression of miR-20a-5p and runt-related transcription factor 3 (RUNX3) in HCC and paraneoplastic tissue, transfected Huh7 and highly metastatic human hepatocellular carcinoma (MHCC97H) cells. A live cell workstation was used to observe the proliferation and migration of transfected cells. The invasiveness of transfected cells was verified by Transwell assay. Cell apoptosis was detected by flow cytometry. The expression levels of proteins after transfection were measured using simple western immunoblot measurements. Gene expression profiles between HCC and normal samples were obtained from The Cancer Genome Atlas. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment results were processed by the database for annotation, visualization and integrated discovery. Potential target genes of miR-20a-5p were predicted to further investigate how miR-20a-5p regulates epithelial-mesenchymal transition (EMT) in HCC.Results:MiR-20a-5p was significantly highly expressed in HCC tissues, and overexpression of miR-20a-5p significantly promoted HCC cell proliferation, migration, and invasion and inhibited apoptosis in vitro. The protein expression of E-cadherin was decreased and that of vimentin was increased after overexpression of miR-20a-5p in HCC cells. We discovered the intersection of genes from miRDB, miR TarBase, and TargetScan, obtained 397 target genes and finally focused on RUNX3. RUNX3 was not only reduced in HCC specimens but also drastically reduced in HCC cells overexpressing miR-20a-5p. RUNX3 expression decreased with elevated miR-20a-5p, which activated downstream EMT signaling and promoted cell proliferation, migration, and invasion.Conclusions:Since RUNX3 is involved in EMT in HCC, as proven by previous research, our findings provide further evidence for a novel regulatory pathway comprising the miR-20a/RUNX3/EMT axis that upregulates EMT signaling and enhances the migration of HCC cells.

简介：摘要目的探讨微小RNA(miR)-135b-5p在食管鳞癌发生发展中的调节作用和机制。方法通过收集食管鳞癌患者的组织标本28例，检测miR-135b-5p在食管鳞癌组织中的表达水平，分析比较高表达与低表达组的差异，采用细胞计数试剂盒(CCK-8)、划痕实验、Transwell实验及蛋白质印迹法(Western blot)实验探究miR-135b-5p在食管鳞癌细胞中的调节作用，利用生物信息学技术从数据库中寻找miR-135b-5p的下游信号通路。组间比较采用T检验或卡方检验。结果miR-135b-5p在食管鳞癌患者中低表达(0.004比0.014，Z＝－2.89，P<0.01)且与T分期相关(χ2＝5.82，P<0.05)。此外，划痕实验发现24 h后对照组划痕空白面积低于高表达组(ECA109：0.22±0.02比0.26±0.01，t＝2.21，P<0.05；KYSE150：0.33±0.01比0.54±0.02，t＝9.77，P<0.01)，Transwell实验说明24 h后高表达组细胞迁移数量低于对照组(ECA109：47.17±4.98比136.00±7.78，t＝9.62，P<0.01；KYSE150：25.83±2.10比153.00±7.49，t＝16.34，P<0.01)，48 h后高表达组细胞侵袭数量低于对照组(ECA109：171.00±24.02比382.30±15.34，t＝7.42，P<0.01；KYSE150：244.00±27.33比493.70±53.23，t＝4.17，P<0.01)，高表达组p-smad2/3蛋白表达低于对照组(ECA109：0.82±0.02比1.10±0.03，t＝7.70，P<0.01；KYSE150：0.28±0.02比0.73±0.02，t＝14.12，P<0.01)。结论miR-135b-5p可能通过下调smad2/3磷酸化水平抑制食管鳞癌细胞的迁移与侵袭。

简介：摘要目的探讨微小RNA(miRNA)-6516-5p在肾癌细胞系中的表达及调控肾癌细胞增殖和迁移的分子机制。方法用实时荧光定量聚合酶链反应(qRT-PCR)检测肾癌细胞系和正常近端肾小管上皮细胞系中miR-6516-5p的表达。用脂质体法分别将miR-6516-5p模拟物和无意义序列(NC)瞬时转染至miR-6516-5p表达最低的肾癌细胞，即miR-6516-5p组和NC组。qRT-PCR检测转染细胞miR-6516-5p的表达。CCK-8法和Transwell迁移实验检测转染细胞的增殖和迁移。生物信息学软件和双荧光素酶基因报告实验分别预测和验证miR-6516-5p对靶基因的调控。qRT-PCR和Western blotting法分别检测转染细胞中靶基因的表达。计量资料以均数±标准差(±s)表示，两组间比较采用t检验，多组间比较采用单因素方差分析。结果miR-6516-5p在肾癌细胞系中的表达均明显低于正常近端肾小管上皮细胞(P<0.01)，786-O细胞中miR-6516-5p的表达最低(F＝27.69，P<0.01)。NC组和miR-6516-5p组786-O细胞中miR-6516-5p的表达分别为1.01±0.08和9.91±1.16，与NC组比较，miR-6516-5p组786-O细胞中miR-6516-5p表达明显增加(t＝7.63，P<0.01)。上调miR-6516-5p能显著抑制786-O细胞的增殖(P<0.05)。NC组和miR-6516-5p组细胞迁移数分别为(85.65±8.77)个和(28.05±6.20)个，过表达miR-6516-5p可抑制786-O细胞的迁移(t＝5.36，P<0.01)。miR-6516-5p的靶基因可能是鸟氨酸脱羧酶1(ODC1)，miR-6516-5p能显著抑制野生型ODC1-3′UTR的荧光素酶活性(t＝9.83，P<0.01)。上调miR-6516-5p可降低786-O细胞中ODC1 mRNA和蛋白的表达(P<0.01)。结论miR-6516-5p在肾癌细胞系中表达降低，miR-6516-5p通过靶向ODC1抑制肾癌786-O细胞的增殖和迁移，miR-6516-5p可能成为肾癌潜在的分子靶点。

简介：摘要目的探究miR-363-5p对鼻咽癌细胞增殖和凋亡的影响及可能机制。方法采用实时荧光定量PCR（RT-PCR）检测人正常鼻咽上皮细胞NP-69和鼻咽癌细胞5-8F内的miR-363-5p的表达水平；检测过表达miR-363-5p后，5-8F细胞的增殖能力、凋亡水平以及Bax、Caspase3、BRD4蛋白的表达水平。结果相对于NP-69细胞，5-8F细胞中的miR-363-5p的表达水平（0.71±0.45）显著降低（t=2.68，P < 0.05）；过表达miR-363-5p后，5-8F细胞的增殖能力显著降低（F=22.68，P < 0.05），凋亡细胞［（24.45±5.38）%］显著高于对照组［（18.23±2.41）%］（t=4.13，P < 0.05），Bax（1.35±0.24）、Caspase3蛋白（1.44±0.34）水平显著高于对照组［（1.00±0.08）、（1.00±0.23）］（t=3.12、5.12，P < 0.05），而BRD4蛋白的表达水平（0.42±0.24）显著低于对照组（1.00±0.37）（t=2.98，P < 0.05）。结论miR-363-5p能够抑制鼻咽癌细胞的增殖，并且可促进细胞的凋亡。miR-363-5p的肿瘤负性调节作用可能是通过抑制BRD4蛋白的表达发挥的。

简介：摘要目的探讨先天性巨结肠(HSCR)组织中Zeste基因增强子人类同源物2(EZH2)、微小核糖核酸(miR)-145-5p、胶质细胞源性神经营养因子受体alpha1(GFRα1)之间的调控关系。方法选取湖南省儿童医院2016年3月至2018年6月收治的24例HSCR患儿痉挛段结肠组织为HSCR组，同期18例因新生儿坏死性小肠结肠炎(NEC)手术治疗患儿的坏死结肠组织为NEC组作为对照。实时定量聚合酶链反应检测HSCR组和NEC组结肠组织内miR-145-5p及GFRα1的表达水平，荧光素酶活性实验检测GFRα1与miR-145-5p的关系。之前研究检测的EZH2蛋白水平与miR-145-5p表达水平做相关性分析。采用实时定量聚合酶链反应检测神经母细胞瘤细胞SH-SY5Y转染EZH2过表达质粒后miR-145-5p的表达水平。两组比较采用独立样本t检验，使用Pearson进行相关性分析，多组数据使用One-way ANOVA进行单因素方差分析，并使用LSD检验进行两两比较。结果HSCR组miR-145-5p水平明显高于NEC组[5.62±2.04比1.11±0.48，t＝9.169，P<0.01]，GFRα1 mRNA水平明显降低(0.39±0.18比1.00±0.37，t＝－7.001，P<0.01)，且miR-145-5p表达水平与GFRα1表达水平呈明显负相关(r＝－0.676，P<0.01)。荧光素酶活性实验证实GFRα1为miR-145-5p的靶基因。EZH2蛋白水平与miR-145-5p表达水平呈明显负相关(r＝－0.56，P<0.01)。EZH2过表达组miR-145-5p的表达显著低于质粒对照组(0.33±0.07比1.02±0.13，t＝7.264，P<0.01)。结论HSCR患儿病变结肠组织中EZH2-miR-145-5p-GFRα1调节轴失衡是HSCR发生的重要原因。

简介：【摘要】本研究首先分析了miR-15b-5p在胃癌细胞中的表达、HDGF在胃癌细胞中的表达，然后探讨了miR-15b-5p对胃癌细胞增殖的抑制、HDGF对胃癌细胞增殖的抑制、miR-15b-5p靶向HDGF对胃癌细胞增殖的抑制。

简介：摘要：党管人才原则是实现新时代人才强国战略的根本保证，但是当前各地区党委和政府组织等在实践中如何践行党管人才的原则还缺乏清晰的认识。本文在分析党管人才的历史实践与理论研究的基础上，提出了资源基础观和舒勒5P模型视角下的地区党管人才实施路径，构建了从人才发展指导思想（人才哲学）到人才政策、人才发展规划、人才发展实践和人才管理过程的体系化路径，为地区和各级组织全面贯彻落实中央人才工作会议上提出的加强党对人才工作的全面管理原则提供启示与借鉴。

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简介：摘要目的探讨miR-485-5p对顺铂耐药卵巢癌细胞的影响及其机制。方法RT-qPCR检测人正常卵巢上皮细胞株（IOSE-80）及卵巢癌细胞株（A2780、SKOV3、OVCAR3、OVCA433）中miR-485-5p的表达。构建顺铂（DDP）耐药卵巢癌细胞并检测miR-485-5p与EGFR的表达。CCK8法检测各组细胞增殖能力，流式细胞术测定细胞凋亡。结果相对于IOSE-80细胞，各卵巢癌细胞株中miR-485-5p的表达显著下降，EGFR表达上升（均P<0.05）。SKOV3/DDP细胞株（0.17±0.02）中miR-485-5p表达较SKOV3细胞（0.32±0.04）进一步下降（t=5.81, P=0.004）。而SKOV3/DDP细胞中EGFR表达则较SKVO3进一步上升（P<0.05）。SKOV3/DDP细胞转染miR-485-5p mimic能抑制细胞增殖活力、诱导细胞凋亡，转染miR-485-5p inhibitor则相反（均P<0.05）。SKOV3/DDP细胞转染EGFR能促进细胞增殖并抑制细胞凋亡，该作用被miR-485-5p mimic部分抵消。结论miR-485-5p参与调控卵巢癌细胞的顺铂耐药，过表达miR-485-5p能提高卵巢癌化疗敏感性，该作用可能是通过负调控EGFR实现的。