反义寡核苷酸对脑胶质瘤细胞生长抑制作用的动态研究

目的　探讨原癌基因 c- m yb反义寡核苷酸 (AON)对 C6脑胶质瘤细胞的体内生长抑制作用。方法　将 C6脑胶质瘤细胞接种于裸鼠皮下 ,当肿瘤长至 10 mm左右时随机分成 3组 (每组 12只 ) ,分别用 c- mybAON、正义寡核苷酸 (SON)和生理盐水瘤区原位注射 ,注药后 4、8、12和 16日各组处死动物 3只 ,动态观察肿瘤的体积、重量及病理学改变 ;用流式细胞仪检测肿瘤细胞的凋亡 ;以免疫组化方法分析各组的 c- m yb、bcl- 2蛋白阳性表达率。结果　 c- myb AON组的肿瘤体积抑制率分别为第 4天 6 6 .7% ,第 8天 71.4% ,第 12天 72 % ,第 16天73% ,与对照组相比 ,其生长抑制作用具有显著性 (P<0 .0 5 ) ;AON组凋亡细胞百分率为第 4天 3.4% ,第 8天 2 7.1% ,第 12天 46 .1% ,第 16天 48.4% ,是 SON组和对照组相应时段凋亡细胞的 3.5倍以上 (P<0 .0 5 ) ;AON组 c-myb和 bcl- 2蛋白阳性表达率较对照组有显著降低 (P<0 .0 5 ) ;且 AON治疗后的脑胶质瘤中见较多炎性细胞浸润和钙化灶。结论　 c- myb癌基因有可能成为反义基因治疗恶性脑胶质瘤的优选靶点之一     

长链非编码RNA Linc00472靶向微小RNA-381对骨肉瘤细胞增殖、凋亡、迁移、侵袭的影响

目的观察长链非编码RNA Linc00472(LncRNA Linc00472)靶向调控微小RNA-381(miR-381)对骨肉瘤细胞增殖、凋亡、迁移、侵袭的影响。方法收集2017年3月至2018年5月郑州大学第一附属医院收治的骨肉瘤患者29例为研究对象,实时荧光定量聚合酶链反应(RT-qPCR)检测骨肉瘤组织和瘤旁组织中Linc00472的表达。将骨肉瘤U2OS细胞分为pcDNA3.1组、pcDNA3.1-Linc00472组、pcDNA3.1-Linc00472+miR-NC组、pcDNA3.1-Linc00472+miR-381组。甲基噻唑基四唑(MTT)检测细胞增殖;流式细胞术检测细胞凋亡;Transwell实验检测细胞迁移及侵袭。双荧光素酶报告实验鉴定Linc00472与miR-381的靶向关系。两组间比较采用独立样本t检验,多组间比较采用单因素方差分析。结果Linc00472在骨肉瘤组织中的表达水平低于瘤旁组织(0.31±0.03比1.03±0.10,t=37.138,P<0.05),差异有统计学意义;与pcDNA3.1组比较,pcDNA3.1-Linc00472组细胞存活率[(100.29±10.12)%比(53.29±5.44)%]低于pcDNA3.1组(t=12.272,P<0.05),差异有统计学意义,迁移细胞数[(266.00±23.61)个比(124.00±12.01)个]与侵袭细胞数[(131.00±13.06)个比(62.00±6.24)个]少于pcDNA3.1组(t=16.082,P<0.05;t=14.301,P<0.05),差异有统计学意义,而细胞凋亡率[(8.58±0.91)%比(26.61±2.64)%]高于pcDNA3.1组(t=19.370,P<0.05),差异有统计学意义;miR-381过表达可抑制野生型载体WT-Linc00472细胞的荧光素酶活性(t=19.827,P<0.05),差异有统计学意义;与pcDNA3.1-Linc00472+miR-NC组比较,pcDNA3.1-Linc00472+miR-381组可增强细胞增殖[(53.17±5.33)%比(85.26±8.62)%]、迁移[(122.00±12.31)个比(223.00±22.18)个]及侵袭[(64.00±6.36)个比(104.00±10.20)个]能力高于pcDNA3.1-Linc00472+miR-NC组(t=9.499,P<0.05;t=11.945,P<0.05;t=9.983,P<0.05),细胞凋亡率[(26.11±2.62)%比(13.11±1.34)%]低于pcDNA3.1-Linc00472+miR-NC组(t=13.253,P<0.05),差异有统计学意义。结论LncRNA Linc00472通过靶向调控miR-381可抑制骨肉瘤细胞增殖、迁移及侵袭并诱导细胞凋亡。     

Simultaneous bilateral hallux valgus surgery: Percutaneous or conventional? Early results of a matched study from a tertiary institution

BackgroundHallux valgus is bilateral in up to 84 % of cases. In the setting of simultaneous bilateral correction, we aim to evaluate if minimally invasive percutaneous surgery (MIS) provides any advantage compared to conventional open surgery.Methods52 feet (26 patients) undergoing simultaneous bilateral MIS surgery were matched by severity of deformity to 52 feet (26 patients) undergoing simultaneous conventional open surgery. Patients were followed for a minimum of six months. Pre- and post-operative radiographs and clinical records were reviewed.ResultsThere were no significant differences in pre-operative function or pain between both groups. Post-operatively, the mean hallux valgus angle (HVA) was significantly lower in the MIS group. (HVA MIS – 8.6; Open – 11.8, P = 0.013). There were no significant differences in post-operative outcome and patient satisfaction between both groups.ConclusionThis study demonstrates that simultaneous bilateral MIS hallux valgus surgery can be considered for patients with bilateral symptomatic hallux valgus.     

Exploration of the association between serum uric acid and testosterone in adult males: NHANES 2011–2016

BackgroundPrevious studies have suggested that the possible relationship between serum uric acid (SUA) and testosterone. However, the results of previous studies are controversial and there is limited evidence examining the relationship between SUA and testosterone in a general US population of men. The objective of this study is to explore the correlation of SUA and testosterone among adult males from the US.MethodsData from the National Health and Nutrition Examination Survey 2011–2016 were used, including a total of 7,796 male participants aged 18 years or older and excluding those lacking serum testosterone and uric acid data. Clinical characteristics of the participants among different SUA groups and testosterone groups are compared. Univariate and multivariate linear regression analyses were applied to evaluate the association between SUA and testosterone.ResultsWe found an inverse association between SUA and testosterone after fully adjusted the potential confounding factors in general US adult males. In the multivariate linear regression analysis, we found that increasing age (estimate testosterone percent difference: −0.20% per year, P<0.01), uric acid (estimate testosterone percent difference: −4.40% per md/dL, P<0.01) and BMI (estimate testosterone percent difference: −2.86% per kg/m2, P<0.01) were associated with declining serum testosterone. This association remained significant in sensitivity analysis, while in the stratified analysis, above association was not significant in men with diabetes or aged 65 and over.ConclusionsSUA levels might be negatively associated with serum testosterone in adult males.     

Influences of Heavy Metals and Salt on Seed Germination and Seedling Characteristics of Halophyte Halogeton glomeratus

Bulletin of Environmental Contamination and Toxicology - Heavy metals pollution and salinization of soils are widely distributed in agricultural soils. This study investigated the effects of five...     

大鼠睾丸支持细胞发育的形态学研究

对７０例不同胎龄及生后不同发育阶段Ｗｉｓｔａｒ大鼠睾丸支持细胞的发育进行了光镜、电镜研究。结果：１．依形态学特点，将支持细胞的发育过程初步分为４期：分化前期（胚胎１１～１５ｄ）、分化期（胚胎１５ｄ～生后１至２周）、成熟前期（生后２周～青春期前）、成熟期（青春期后）。２．胚胎及新生时，在支持细胞间见到两侧胞膜紧密相贴及不典型的桥粒连接等；自生后４周，见到紧密连接。３．自胚胎１７ｄ至成熟以后，在支持细胞与其周围的生殖细胞间见到大量类似桥粒和类似中间连接等不典型的细胞连接。４．胚胎１９ｄ及新生期，睾丸索内除支持细胞及生殖细胞外，尚可见一种特殊的细胞。     

卡维地洛对高血压大鼠主动脉的保护作用

目的 :研究卡维地洛对核因子 κB(NF κB)、单核细胞趋化蛋白 1(MCP 1)在自发性高血压大鼠 (SHR)大血管中表达的影响 ,探讨其对血管保护的机制。方法 :18只雄性 12周龄SHR随机分为阳性组 ,卡维地洛组 ( 30mg/kg·d) ,美托洛尔组 ( 50mg/kg·d) ,灌喂 8周 ;另选同龄雄性WistarKyoto大鼠为阴性组 (n =6 )。用免疫组化法测各组主动脉NF κB、MCP 1的表达 ,ELISA法测血清MCP 1含量。结果 :与阴性组比较 ,阳性组主动脉组织中NF κB、MCP 1表达增加 (P<0 .0 1) ,且两者正相关 (r=0 .72 8,P <0 .0 1) ;血清MCP 1含量升高 1.6 4(P <0 .0 1)。 8周后 ,治疗组之间血压无明显差异 (P >0 .0 5) ,但卡维地洛更显著抑制NF -κB、MCP 1表达 (P <0 .0 5)。结论 :卡维地洛可能独立于降压外抑制NF κB的活化来调控MCP 1表达。     

生物钟相关基因在原发性肝细胞癌中的表达及临床意义——基于TCGA数据集分析

目的：探究生物钟相关基因在原发性肝细胞癌（简称肝癌）中的表达及意义。方法：从美国癌症和肿瘤基因图谱数据库（The Cancer Genome Atlas,TCGA）中下载肝癌数据424例,包括374例肝癌患者样本及50例正常对照样本。运用DECenter软件对51个生物钟相关基因进行差异表达分析,比较生物钟基因在肝癌患者及正常样本之间的表达情况。运用DAVID在线工具分析差异基因的GO及KEGG功能富集通路,并通过STRING数据库构建差异基因之间蛋白质相互作用网络。了解生物钟基因肝癌发生发展过程中的主要作用。结果：在374例肝癌患者样本的51个生物钟相关基因中,有21个基因在肝癌样本中表达上调（P<0.05）,3个基因表达下调（P<0.05）。生物钟基因高表达样本主要富集于Wnt信号通路、Hedgehog信号通路及Hippo信号通路（P<0.001）。参与调节昼夜节律和细胞代谢的10个生物钟基因在蛋白质相互作用网络中相关性最为紧密（P<0.001）。GO分析差异基因集中作用于调节昼夜节律、细胞代谢过程、基因表达等通路（P<0.001）。结论：生物钟相关基...