SNHG6靶向miR-101/TGFBR1促进AMI小鼠左心室心肌纤维化

目的探讨SNHG6对急性心肌梗死(AMI)小鼠左心室心肌的影响。 方法将30只雄性C57/BL6小鼠构建成AMI小鼠后随机均分为AMI组、AMI+SNHG6组、AMI+miR-101-3p组、AMI+SNHG6+miR-101-3p组、AMI+miR-101-3p+TGFBR1组,另设正常小鼠6只为假手术组。qRT-PCR检测AMI小鼠SNHG6、miR-101-3p表达水平。心脏彩超检测各组小鼠左室射血分数(LVEF);马松和天狼星红染色法以及免疫组化分析各组小鼠左心室心肌纤维化变化。将H9C2细胞株分为阴性对照组(转染空质粒)、SNHG6组(转染质粒SNHG6)、miR-101-3p组(转染质粒miR-101-3p)。Western blotting检测各组TGFBR1蛋白表达;采用双荧光素酶报告基因法预测并验证SNHG6/miR-101-3p/TGFBR1荧光素酶活性及调控机制。 结果AMI小鼠较假手术组SNHG6表达显著增加,miR-101-3p降低(P＜0.05)。与AMI组比较,AMI+SNHG6组小鼠LVEF降低,心肌纤维化程度加重(P＜0.05);AMI+miR-101-3p组LVEF升高,心肌纤维化程度减轻(P＜0.05)。AMI+SNHG6+miR-101-3p组较AMI+SNHG6组LVEF升高、心肌纤维化程度减轻(P＜0.05),而AMI+miR-101-3p+TGFBR1组较AMI+miR-101-3p组LVEF降低、心肌纤维化程度加重(P＜0.05)。双荧光素酶报告基因法验证显示,miR-101-3p组SNHG6、TGFBR1野生型质粒的荧光素酶活性较阴性对照组明显降低(P＜0.05)。 结论SNHG6抑制miR-101-3p上调TGFBR1加重AMI小鼠左心室心肌纤维化。     

阴部神经相关选穴对针灸治疗压力性尿失禁疗效影响的Meta分析

压力性尿失禁（stress urinary incontinence,SUI）是指喷嚏、咳嗽、大笑或运动等腹压增高而无逼尿肌收缩的情况下出现的不自主漏尿,该病严重影响患者生活质量及身心健康。中国成年女性SUI的患病率约18.9%,在50~59岁年龄段可高达28.0%。我国2017年女性压力性尿失禁治疗指南推荐的保守治疗主要包括生活方式干预（行为治疗）、盆底肌训练（pelvic floor muscle training, PFMT）、盆底肌生物反馈、电刺激治疗、药物治疗及抗尿失禁子宫托等。针灸治疗尿失禁临床具有良好的效应,但由于缺乏高质量临床研究证据,尚未被指南推荐。因此,我们对相关文献进行检索,发现近5年针灸治疗SUI的随机对照研究数量明显增加,次髎、中髎、会阳、骶四穴、秩边等尾骶部腧穴在临床上的运用日益受到关注,考虑可能与针刺刺激阴部神经丛,从而调节盆底肌肌力、改善尿控能力效应有关。基于此,我们希望对针灸治疗SUI的系统评价进行更新,并评价不同针灸取穴方案对SUI疗效的影响,以期为SUI的临床治疗提供参考意见。     

A study on the literature on sheng mai powder of past dynasties

Our study reveals that the earliest historical records of Sheng Mai Powder are found in "Yixue qiyuan" ("Origins of Medicine"), a medical book written by Zhang Yuansu and published in the beginning of 1186, 45 years earlier than the latest edition of "Neiwai shangbian huolun" ("Treaties on the identification of Internal Diseases and External Damages"), written by Li Gao in 1231. The study also suggests that the assertion of Sheng Mai Powder to be inaugurated by Sun Simiao is groundless.     

中国江苏地区汉族人群肿瘤坏死因子β遗传多态性研究

目的　探讨中国江苏地区汉族人群肿瘤坏死因子 β遗传多态性分布。方法　收集江苏地区 16 8名无血缘关系健康个体的静脉血提取DNA ,应用聚合酶链反应限制性片段长度多态性 (PCR -RFLP) ,对TNFβ基因多态性进行分析。结果　TNFβ检测到三个等位基因 ,其基因型频率分别为TNFβ 1/ 1=2 1 4 % ,TNFβ 1/ 2 =4 7% ,TNFβ 2 / 2 =31 5 % ,基因型分布符合Hardy-Weinberg定律。统计分析显示 :江苏地区汉族人群TNFβ等位基因频率分布与欧美白种人均有显著性差异(P <0 0 5 )。结论　TNFβ等位基因频率分布具有种族差异     

Technical quality evaluation of EEG recording based on electroencephalographers' knowledge

The aim of this study is to develop a technical quality evaluation system of electroencephalogram (EEG) recording in order to acquire technically satisfactory EEG records, which may contribute to the accuracy improvement of EEG interpretation. In our developed system, the evaluation of EEG recording comprises the detection of technical artifacts and physiological status, which indicates the recording status objectively. In addition, the caution signals to users are generated in the system according to the undesired status detected. The information displayed to users includes the updated EEG records and instant evaluation results. Two examples of evaluation results are introduced in this paper, illustrating unsatisfactory records and artifact free records, respectively. The experimental results are proposed to verify the effectiveness of the technical quality evaluation of EEG recording. The implementation of the technical quality evaluation of EEG recording is helpful to acquire technically satisfactory EEG records, which may improve the accuracy of results in both the visual and the automatic EEG interpretation, and ease the laborious work of EEG technicians in the recording progress.     

In-vitro maturation of human germinal vesicle stage oocytes: role of cumulus cells and epidermal growth factor in the culture medium

In-vitro maturation (IVM) of oocytes is a promising technique to reduce the costs and avert the side-effects of gonadotrophin stimulation for in-vitro fertilization (IVF). The pregnancy rates from oocytes matured in vitro are much lower than those of in-vivo stimulation cycles indicating that optimization of IVM remains a challenge. Therefore, we investigated the effect of supplementation of the medium with gonadotrophins, oestradiol and epidermal growth factor (EGF) and the effect of retaining or removing the cumulus cells on nuclear and cytoplasmic maturation of immature oocytes. Human germinal vesicle (GV) oocytes obtained after gonadotrophin stimulation for intracytoplasmic sperm injection (ICSI) were cultured in a complex defined medium either supplemented with gonadotrophins, oestradiol and physiological concentrations of EGF (2 ng/ml) or gonadotrophins and oestradiol alone. The cumulus cells were either removed or kept intact. In GV stage oocytes cultured without cumulus (group I) significantly more oocytes reached the metaphase II (MII) stage at 30 h in media supplemented with EGF (64.3 versus 33.9%, P < 0.003). For oocytes cultured with intact cumulus (group II), more oocytes reached MII at 30 h than in group I, but there was no difference in medium with or without EGF supplementation (81.8 and 79.8% respectively). Cytoplasmic maturation of MII oocytes was judged from their capability to activate and fertilize after ICSI. In group I, the rates of activation and normal fertilization were similar. However, in group II, significantly more oocytes underwent normal fertilization in the EGF-supplemented than the unsupplemented group (71.7 versus 45.6%, P < 0.05). The cleavage rates of the fertilized oocytes were similar in the sibling oocyte subgroups cultured with or without EGF supplementation, but the overall cleavage rates were higher in cumulus-intact compared to cumulus-denuded oocytes (88.9 versus 47.8%, P < 0.001). Thus, supplementation of the maturation medium with EGF and maintenance of the cumulus during culture improve the nuclear and cytoplasmic maturation of human oocytes in vitro.      

荧光定量PCR快速诊断21三体综合征

目的　建立荧光定量PCR技术检测 2 1三体综合征。方法　采用PCR方法同时扩增位于 2 1号染色体上的人肝型磷酸果糖激酶基因 (humanliver typephosphofructokinasegene ,PFKL CH 2 1)和位于 1号染色体上的人肌型磷酸果糖激酶基因 (humanmuscle typephosphofructokinasegene ,PFKM CH1) ,使用SYBRGreenⅠ荧光染料处理产物、琼脂糖电泳后在凝胶成像系统进行分析 ,得出扩增产物的荧光强度对比值。用此方法检测 2 6例 2 1三体综合征患儿及 2 0名正常人。结果　 2 6例 2 1三体综合征患儿PFKL CH2 1/PFKM CH 1扩增产物的荧光强度对比值为 1.5 8± 0 .17,而正常人为 1 0 0± 0 .0 5 ,两者差异有显著性。结论　SYBRGreenⅠ荧光定量PCR技术检测 2 1三体综合征具有准确、快速、安全、实用等特点 ,有较高的临床使用价值。     

以造影增强磁共振血管成像术诊断先天性主动脉弓畸形

目的评价造影增强磁共振血管成像术（CE-MRA）对先天性主动脉弓畸形的诊断准确性并与超声心动图等比较。方法413例先天性主动脉弓畸形病例在1999年4月到2004年12月期间做了CE-MRA检查。年龄5d～11岁，平均年龄2.4岁。检查使用1.5T磁共振扫描仪。对比剂gadolinium-DTPA，剂量0.2mmol／kg体质量，手动静脉注射。磁共振检查前均已做心脏超声检查。结果在413例中，动脉导管未闭（PDA）166例，主动脉缩窄（COA）168例，主动脉弓中断（IAA）31例，双主动脉弓等其他先天性主动脉弓畸形48例。全部413例均经手术和／或X线心血管造影证实。CE-MRA的诊断准确率为97.3％（402／413），心脏超声检查的诊断准确率为87.2％（360／413）。结论对于先天性主动脉弓畸形，CE-MRA是可靠的影像学检查方法，不仅优于心脏超声检查，有时CE-MRA甚至能比传统的X线心血管造影术提供更多的诊断信息。     

圆孔外面的观察和测量及其面积的回归方程

60具成人颅骨颅底外面的圆孔观察和测量结果表明:圆孔多呈圆形,其次是卵圆形,其它形较少见.据圆孔与翼突外侧板根部延长线的位置关系,分圆孔位置为三型.圆孔外面观的各项测值左右间均无统计学差异,但其中管性圆孔管长度个体差异较大.圆孔的面积左右比较对称者占3.33±2.34%,左>右者占65.51±6.30%,右>左者占34.48±6.30%.圆孔面积左右对称性比较,对临床诊断疾病有参考意义.其面积的回归方程可由其长、宽径乘积推算 .     

Fourier transform infra-red spectroscopy of atactic polystyrene in the glass transition region

Fourier transform infra-red (IR) studies on samples of atactic polystyrene with different thermal history, i.e. quenched from the melt (QM), quenched from the rubbery state (QR), slowly cooled (SC), and sub-glass-transition (sub-T_g) annealed (AN), were carried out in the absorption region from 500 to 600 cm^?1 with gradually increasing temperatures through the glass transition region at 100°C. The heights of the positive peak (532 cm^?1) and the negative peak (566 cm^?1) appearing in the temperature difference spectra, T-60°C, are considered to be a measure of the amount of frequency shifts for the 540 cm^?1 and 557 cm^?1 bands in the conformationally sensitive spectral range of atactic polystyrene. These bands show a continuously increasing low-frequency shift with increasing temperature, except for sample QM, the 557 cm^?1 band of which shows an inappreciable frequency shift in the range 60 < T/°C < 100. The different temperature behaviour of these shifts for samples QM, QR, SC and AN is due to changes in their intermolecular interactions. Sub-T_g annealing of the sample QM is shown to shift the frozen high-temperature state of the quenched sample to the temperature-defined equilibrium. For all samples of different thermal history the difference in their IR spectra vanish at temperatures above T_g.