近红外光谱法快速测定山银花中四种有机酸

目的：建立近红外光谱（Near-Infrared Spectroscopy,NIR）快速检测山银花提取过程中四种有机酸含量的方法。方法：采集山银花NIR图谱,以高效液相色谱法为参考方法测定绿原酸、异绿原酸A、异绿原酸B和异绿原酸C的含量。采用偏最小二乘法（Partial Least square,PLS）建立定量校正模型。结果：校正模型中绿原酸、异绿原酸A、异绿原酸B和异绿原酸C的相关系数R分别为0.997 6、0.997 0、0.979 2、0.998 9,内部交叉验证均方根误差（RMSECV）分别为0.039 4、0.014 4、0.007 3、0.007 8;预测结果中上述成分对应的相关系数分别为0.892 0、0.827 9、0.878 4、0.995 1,预测均方根误差（RMSEP）分别为0.045 0、0.013 5、0.007 8、0.008 0,相对预测 偏差（RSEP）分别为0.351 0%、0.018 0%、0.040 0%、0.005 7%。结论：所建近红外检测方法快速、准确,可用于山 银花四种有机酸的快速检测。     

丁香降气汤治疗胃食管反流病60例临床观察

目的：评价丁香降气汤治疗胃食管反流病的临床疗效。方法：将90例胃食管反流病患者分为中药组（60例）、西药组（30例），分别给予丁香降气汤和奥关拉唑治疗8周，观察2组的临床疗效和胃镜疗效。结果：中药组临床总有效率为95．00％；西药组临床总有效率为83．33％。中药组的临床总有效率优于西药组（P〈0．01）。中药组胃镜复查总有效率84．21％；西药组总有效率81．48％。2组胃镜复查总有效率无显著性差异（P〉0．05）。结论：丁香降气汤治疗胃食管反流病具有良好的临床疗效和胃镜疗效。     

白族药八边叶（八角枫）的研究进展

八边叶,白族民间用于治疗风湿性关节炎、跌打损伤、腰肌劳损等。其优点是疗效可靠,药源广泛。通过查阅关于八边叶研究文献,对八边叶主要化学成分、药理作用及民间用药经验进行了总结,以期为八边叶的深入研究和开发利用提供科学依据。     

高寒藏药──川西獐牙菜组织培养研究Ⅰ.愈伤组织的诱导及初步培养

从川西獐牙菜的胚轴、未成熟种子及幼叶诱导出愈伤组织；试验选用MS、B5和N63种培养基，其中以加有2，4－D3mg／L＋KT0.6mg／L的MS培养基诱导率最高。结果表明,不同培养基及不同激素组合对愈伤组织诱导率有较明显的影响。初步证明了用植物组织培养的方法进行川西獐牙菜的无性快速繁殖是有可能的。     

Mammographic density and risk of breast cancer by age and tumor characteristics

Introduction

Understanding whether mammographic density (MD) is associated with all breast tumor subtypes and whether the strength of association varies by age is important for utilizing MD in risk models.

Methods

Data were pooled from six studies including 3414 women with breast cancer and 7199 without who underwent screening mammography. Percent MD was assessed from digitized film-screen mammograms using a computer-assisted threshold technique. We used polytomous logistic regression to calculate breast cancer odds according to tumor type, histopathological characteristics, and receptor (estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor (HER2)) status by age (<55, 55–64, and ≥65 years).

Results

MD was positively associated with risk of invasive tumors across all ages, with a two-fold increased risk for high (>51%) versus average density (11-25%). Women ages <55 years with high MD had stronger increased risk of ductal carcinoma in situ (DCIS) compared to women ages 55–64 and ≥65 years (P_{age-interaction} = 0.02). Among all ages, MD had a stronger association with large (>2.1 cm) versus small tumors and positive versus negative lymph node status (P’s < 0.01). For women ages <55 years, there was a stronger association of MD with ER-negative breast cancer than ER-positive tumors compared to women ages 55–64 and ≥65 years (P_{age-interaction} = 0.04). MD was positively associated with both HER2-negative and HER2-positive tumors within each age group.

Conclusion

MD is strongly associated with all breast cancer subtypes, but particularly tumors of large size and positive lymph nodes across all ages, and ER-negative status among women ages <55 years, suggesting high MD may play an important role in tumor aggressiveness, especially in younger women.     

YAP在骨肉瘤细胞中的表达及定位

目的:研究YAP在骨肉瘤细胞中的表达情况和定位。方法:使用SOSP9607、MG63、U2-OS骨肉瘤细胞系和hFOB1.19成骨细胞系,进行qRT-PCR、Western blot实验和荧光共聚焦显微镜观察YAP的表达情况和所在的具体细胞位置。结果:YAP在骨肉瘤细胞中表达量非常高,高于正常的成骨细胞hFOB1.19。YAP在骨肉瘤细胞系中主要表达于细胞核内,而在成骨细胞系中主要表达于细胞质。结论:YAP在骨肉瘤细胞中高表达,在成骨细胞中低表达。在肿瘤细胞中主要位于细胞核内,而在成骨细胞系中主要表达于胞质内。可以推断YAP进入细胞核内,结合下游靶基因,促进肿瘤细胞的生长,参与骨肉瘤细胞的发生。这一发现可以为治疗骨肉瘤提供新的靶点。     

PI3K-AKT-mTOR信号通路在伯基特淋巴瘤中的活化

目的 探讨PI3K-AKT-mTOR信号通路在伯基特淋巴瘤中的活化情况.方法 收集13例伯基特淋巴瘤患者淋巴瘤组织及14例患者淋巴结反应性增生组织病理切片,采用免疫组织化学方法检测AKT、mTOR、RPS6磷酸化情况.结果 伯基特淋巴瘤组织中p-AKT、p-mTOR、p-RPS6表达率分别为84.6％(11/13)、100.0％(13/13)、100.0％(13/13),反应性淋巴结增生为64.2 ％(9/14)、71.4％(10/14)、78.6 ％(11/14),阳性表达率差异均具有统计学意义(均P＜0.05).结论 PI3K-AKT-mTOR信号通路在伯基特淋巴瘤中存在异常活化.     

MicroRNA-200a suppresses the Wnt/β-catenin signaling pathway by interacting with β-catenin

The Wnt/β-catenin signaling pathway is crucial for human organ development and is involved in tumor progression of many cancers. Accumulating evidence suggests that the expression of β-catenin is, in part, regulated by specific microRNAs (miRNAs). The purpose of this study was to determine the expression of a recently identified epithelial to mesenchymal transition (EMT)-associated tumor suppressor microRNA (miR)-200a, in cancer cells. We also aimed to identify specific miR-200a target genes and to investigate the antitumor effects of miR-200a on the Wnt/β-catenin signaling pathway. We employed TOP/FOP flash luciferase assays to identify the effect of miR-200a on the Wnt/β-catenin pathway and we confirmed our observations using fluorescence microscopy. To determine target genes of miR-200a, a 3' untranslated region (3' UTR) luciferase assay was performed. Cell viability, invasion and wound healing assays were carried out for functional analysis after miRNA transfection. We further investigated the role of miR-200a in EMT by Western blot analysis. We found fluctuation in the expression of miR-200a that was accompanied by changes in the expression of members of the Wnt/β-catenin signaling pathway. We also determined that miR-200a can directly interact with the 3' UTR of CTNNB1 (the gene that encodes β-catenin) to suppress Wnt/β-catenin signaling. MiR-200a could also influence the biological activities of SGC790 and U251 cells. Our results demonstrate that miR-200a is a new tumor suppressor that can regulate the activity of the Wnt/β-catenin signaling pathway via two mechanisms. MiR-200a is a candidate target for tumor treatment via its regulation of the Wnt/β-catenin signaling pathway.     

重组人肿瘤坏死因子β(HuTNFβ)的纯化及抗肿瘤效应的初步研究

本文利用能表达HuTNFβ的工程菌株(P20KLT)按常规培养及扩增．即采用LB培养液(内含Amp100．μg／ml Tet 5μg／ml)；1：40扩增．当A550达0．1时，加入IAA(20μg／ml)，当A550为1．0时，中止培养，离心(5000rpm，4℃)收集菌体。在菌体中按1：5加入缓冲液，冰浴中超声破碎，13，000rpm高速离心20分钟，     

子宫颈鳞癌患者放疗前后血清铜、锌的变化

目的检测子宫颈癌患者放疗前后血清铜、锌的变化，检测子宫颈癌患者与正常人血清铜、锌水平的比较。材料与方法采用三电极直流等离子原子发射光电直读光谱仪法检测。结果子宫颈鳞癌患者血清铜（ＳＣｕ）、铜锌比值（Ｃｕ／Ｚｎ）显著高于正常对照组（Ｐ＜０．００１），Ⅲ期患者又显著高于Ⅱ期患者（Ｐ＜０．００１）；放疗后癌灶完全消退者（ＣＤ）ＳＣｕ、Ｃｕ／Ｚｎ明显下降（Ｐ＜０．０１）；部分消退者（ＰＤ）二值仍处于高水平。结论：ＳＣｕ和Ｃｕ／Ｚｎ可以检测放疗疗效，估计预后，有一定临床意义。