表没食子儿茶素没食子酸酯对体外培养食管癌细胞生物学行为的影响

目的研究表没食子儿茶素没食子酸酯(EGCG)对体外培养食管癌细胞增殖、凋亡和转移的影响及其分子机制。方法采用CCK-8法和细胞克隆形成法检测EGCG对食管癌细胞增殖的影响;流式细胞法检测细胞凋亡及周期分布;Transwell法检测细胞体外侵袭力的改变;免疫印迹法检测葡萄糖调节蛋白78(GRP78)表达水平。结果 EGCG处理后,食管癌细胞的增殖和侵袭能力明显受到抑制,凋亡率也显著增高,呈量效关系;随着EGCG浓度升高,GRP78蛋白表达水平明显下降。结论 EGCG可对食管癌细胞产生抑制增殖、诱导凋亡、降低侵袭和转移等作用,可能与其下调细胞内GRP78蛋白有关。     

ϸ���������B��C�ļ�ˮ�⶯��ѧ�о�

??OBJECTIVE To explore the hydrolysis kinetics of capilliposide B and capilliposide C under different temperatures and pH values, and identify the hydrolysis products. METHODS The LC-B and LC-C were quantified by HPLC, then the hydrolysis process was deduced. Samples were taken to investigate the stability of LC-C and LC-B at different time points under the conditions of 30, 50, 70 ??, and pH 8.0, 9.0, 10.0, 11.0, respectively. The hydrolysis products were identified by mass spectrometry and nuclear magnetic resonance spectroscopy. RESULTS The hydrolysis reaction rates of LC-B and LC-C obeyed first-order kinetics under different pH values and temperatures. And they were related to hydrolysis temperature and pH: at the same temperature, the higher the pH, the faster the hydrolysis rate; at the same pH, the higher the temperature, the faster the hydrolysis rate. The hydrolysis product was capilliposide A. CONCLUSION The study provided an effective method for the preparation of LC-A.     

附子毒-效关系探析

应用附子要以"得附子之益,去附子之损"为原则,正所谓"正有毒以祛毒,非无毒以治有毒也"。附子之毒与效密不可分,是以毒攻毒治法的具体体现,辨证地看待附子的毒-效关系,从而对今后附子的临床合理应用提供一定的借鉴。     

解毒化浊方对输卵管炎性阻塞大鼠ICAM-1和NF-κB表达的影响

目的 观察解毒化浊方对输卵管炎性阻塞大鼠细胞间黏附分子-1(ICAM-1)、核因子-κB (NF-κB)的影响,探讨解毒化浊方治疗输卵管炎的作用机制.方法 用混合菌接种法制作输卵管炎性阻塞大鼠模型,按随机数字表法将80只Wistar雌性大鼠分为正常对照组、模型对照组、解毒化浊方低剂量组(低剂量组)、解毒化浊方高剂量组(高剂量组),每组20只.低剂量组、高剂量组于造模的第1天开始,分别按17.83,35.66g/(kg.d)给予灌胃,1次/d,连用30 d.其余两组给予同体积的蒸馏水.观察用药后大鼠输卵管形态及通畅率,采用免疫组织化学SP法检测输卵管组织ICAM-1、NF-κB蛋白表达.结果 高剂量组、低剂量组大鼠ICAM-1、NF-κB蛋白表达降低(P＜O.05或P＜0.01).结论 解毒化浊方对大鼠ICAM-1、NF-κB蛋白表达有调节作用,从而对大鼠输卵管炎具有很好的治疗作用.     

口三针滞针牵拉法治疗顽固性面瘫面神经功能指数评价

目的:探寻治疗顽固性面瘫口角歪斜的有效针刺手法。方法:将101例顽固性面瘫患者随机分为观察组(48例)、对照组(53例)。两组在针刺患侧攒竹、四白、颊车、牵正的基础上,同取患侧口三针(地仓、口禾髎、夹承浆),观察组采用滞针牵拉法,对照组采用常规刺法,每天1次,10天为一疗程,观察2个疗程后面神经功能指数(FNFI)的变化。结果:治疗后两组FNFI均显著升高(均P0.01),且观察组优于对照组(P0.01),观察组面神经功能基本恢复率为87.5%(42/48),优于对照组的67.9%(36/53)(P0.05)。结论:口三针滞针牵拉法是治疗顽固性面瘫口角歪斜的较佳方法。     

TrkC expression predicts favorable clinical outcome in invasive ductal carcinoma of breast independent of NT-3 expression

Background: TrkC, a member of neurotrophin receptor family, functions not only as an oncogene, but also act as a tumor suppressor via a manner of dependence receptor in human malignant tumors. Little is known on the action of TrkC for the clinical prognosis and the progression of breast cancer according to the availability of its ligand NT-3. We sought to investigate the prognostic relevance of NT-3-TrkC axis in breast cancer and estimate its role during the process of breast cancer progression. Methods: 236 cases of invasive ductal carcinoma (IDC), 60 pure ductal carcinoma in situ (DCIS) and 30 normal breast tissue (NBT) between 2004 and 2005 were included in the study. Spearman’s rank correlation test was used to analyze the association of NT-3-TrkC expression and breast cancer progression. The Kaplan-Meier method and Cox proportional hazards model were performed to identify the relevant prognostic factors. Results: 50.4% IDC tumors displayed absent or low TrkC expression, while 49.6% was high TrkC expression. TrkC expression was negatively associated with lymph node metastasis (P = 0.029) and tumor proliferation (P = 0.015). Patients with lower TrkC expressing tumors had a higher risk of recurrence (odds ratio, 0.401; 95% confidence interval, 0.207-0.778; P = 0.007). The layered analysis indicated that patients with high TrkC expression tumors had a favor disease-free survival whether NT-3 and TrkC were co-expressed or solitarily expressed in the tumor (P = 0.000). NT-3 was demonstrated to be not a predictor of IDC patients’ prognosis. But NT-3 expression was inversely correlated with the progression of breast cancer (r = -0.341, P = 0.000), since more IDC tumors showed high NT-3 expression than DCIS tumors (51.7% vs. 25.9%), while no NBT showed high NT-3 expression, as well. Conclusion: The study indicates TrkC expression reduces tumor relapse independent of NT-3 availability in the IDC. Elevated NT-3 expression contributes to the progression of breast cancer.     

乳腺癌前哨淋巴结活检假阴性原因分析

目的：探讨应用放射性示踪剂进行乳腺癌前哨淋巴结(sentinel lymph node，SLN)活检时出现假阴性的原因，探索降低假阴性率的方法。方法：从1999年5月～2003年7月进行乳腺癌SLN活检75例，术前注射^99m锝标记的右旋糖酐(^99mTC-DX)，术中应用1探测仪进行SLN探测，术后将SLN单独送检进行病理学检查。结果：SLN活检的成功率为96％，灵敏度为92％，特异度为100％，假阴性率为8％，假阳性率为0，准确性为97．2％，阳性结果预测值为100％，阴性结果预测值为95．9％，尤登指数(正确指数)为0．92。假阴性与适应证的选择、解剖变异、术前活检和放疗、内乳SLN的出现、多灶性病变、病理学检查不彻底、探测技术不熟练有关。结论：严格掌握SLN适应证，严格按标准的操作规程进行探测，术中仔细认真，术后对SLN进行详细的病理学检查，可以逐步将假阴性率降低到可接受的程度。     

聚乙二醇电解质散剂联合低剂量硫酸镁与西甲硅油在结肠镜检查前肠道准备中的应用

目的：探讨聚乙二醇电解质散剂（PEG）中加入低剂量硫酸镁和西甲硅油在结肠镜检查前肠道准备中的应用和观察。方法：150例行结肠镜检查的患者,按不同肠道准备方法随机分为三组：A组：PEG;B组：PEG＋低剂量硫酸镁;C组：PEG＋低剂量硫酸镁＋西甲硅油,每组50例。比较不同方法的有效性、安全性及耐受性。结果：所有患者均完成肠道准备和全结肠镜检查。肠道清洁度比较,C组、B组均优于A组,差异有统计学意义（96％vs 92％vs 72％,χ2＝6．78,χ2＝10．71,均P＜0．05）。肠道内气泡产生率比较,C组优于B组和A组,差异有统计学意义（χ2＝6．35,χ2＝4．33,均P＜0．05）。三种肠道准备方法的不良反应、药物耐受情况差异均无统计学意义（P＞0．05）。结论：聚乙二醇电解质散剂联合低剂量硫酸镁和西甲硅油用于结肠镜检查前的肠道准备,有效性较高,安全性和耐受性值得进一步探讨。     

Effects of organophosphorus pesticides and their ozonation byproducts on gap junctional intercellular communication in rat liver cell line.

The effects of organophosphorus pesticides (OPs), oxons and their ozonation byproducts on gap junctional intercellular communication (GJIC) on cultured BRL cell line were investigated using scrape loading and dye transfer (SL/DT) technique. The neutral red uptake assay was used to identify the non-cytotoxic levels of diazinon, parathion and methyl-parathion applied to GJIC assay. The concentration-dependent inhibition of GJIC was observed over a range of 50-350 mg/l diazinon, parathion and methyl-parathion after 90 min incubation compared with the vehicle control. However, oxons and ozonation byproducts of OPs had no inhibition effect on GJIC at any of the concentrations tested. The inhibition of GJIC by OPs was reversible after removal of the tested pesticides followed by incubation with fresh medium. The present study suggested that the ozonation treatment could be used for the detoxification of drinking water and food crops contaminated with diazinon, parathion and methyl-parathion without formation of GJIC toxicity.