高速逆流色谱法分离纯化浙贝母中贝母素甲, 贝母素乙

目的:采用高速逆流色谱技术分离提纯浙贝母中的活性成分贝母素甲,贝母素乙.方法:采用氯仿-无水乙醇-0.2mo1.L-1盐酸(4:3:2)系统,上相为固定相,下相为流动相.主机转速为800r.min-1,流动相流速为1.2mL·min-1.结果:一次进样分离得到贝母素甲、贝母素乙,经高效液相(HPLC)分析纯度,经MS,1HNMR鉴定结构.结论:利用本实验条件可从浙贝母中分离制备贝母素甲,贝母素乙,两者纯度分别达到:97.5%,94.5%.     

黄精多糖对新生大鼠大脑皮层神经细胞缺氧性凋亡的影响

目的:探讨黄精多糖对体外培养的新生大鼠大脑皮层神经细胞缺氧性凋亡的保护作用.方法:采用"Neurobasal加B27 Supplement"体外培养新生大鼠大脑皮层神经细胞,使用Hoechst 33342荧光染色、免疫细胞化学染色观察黄精多糖对缺氧复氧性神经细胞凋亡的保护作用.结果:缺氧前加入500μg/ml～1.5mg/ml的黄精多糖能显著地降低缺氧复氧培养诱导的神经细胞凋亡率,增加缺氧的神经细胞Bcl-2蛋白的表达,减少Bax蛋白的表达,提高Bcl-2/Bax比值.而缺氧12h后加入黄精多糖则无明显的抗凋亡作用.结论:缺氧前加入黄精多糖可以通过上调缺氧神经细胞Bcl-2表达、下调Bax表达和提高Bcl-2/Bax的比值以避免缺氧的神经细胞凋亡.     

肾气-天癸-冲任-胞宫生殖轴与月经的关系浅谈

女性生殖轴在一生中运转30年左右的时间，从而维持月经周期性节律变化。而在这时期月经是靠肾气-天癸-冲任-胞宫相互作用来完成的。     

Green tea extract modulates actin remodeling via Rho activity in an in vitro multistep carcinogenic model.

Alteration of actin polymerization and loss of actin filaments is a marker of cellular dedifferentiation and early malignant transformation. To study this phenomenon, an in vitro human urothelial model consisting of two cell lines, HUC-PC and MC-T11, were incorporated into the study design. These two cell lines have different malignant transformation potential. The effect of green tea extract (GTE), a potential anticancer agent, on actin remodeling was investigated. Upon exposure to the carcinogen 4-aminobiphenyl (4-ABP), the untransformed HUC-PC undergoes malignant transformation whereas the transformed MC-T11 progresses from noninvasive to invasive tumor. GTE induces actin polymerization in MC-T11 cells in a dose-responsive manner, but this effect is less obvious in the untransformed, more differentiated HUC-PC cells, which natively have higher actin polymerization status. In contrast, GTE antagonizes carcinogen 4-ABP induced actin depolymerization and stress fiber disruption in HUC-PC cells. In MC-T11 cells, GTE inhibits 4-ABP induced motility by increasing cell adhesion and focal adhesion complex formation. The effect of GTE on actin remodeling seems to be mediated by the stimulation of small GTP-binding protein Rho activity, because C3 exoenzyme, a specific inhibitor for Rho, blocks GTE-mediated Rho activation and stress fiber formation in MC-T11 cells. This study shows that GTE exerts an effect on cytoskeletal actin remodeling and provides further support for the use of GTE as a chemopreventive agent.     

Vascular endothelial growth factor gene polymorphisms and risk of primary lung cancer.

Angiogenesis is an essential process in the development, growth, and metastasis of malignant tumors including lung cancer. DNA sequence variations in the vascular endothelial growth factor (VEGF) gene may lead to altered VEGF production and/or activity, thereby causing interindividual differences in the susceptibility to lung cancer via their actions on the pathways of tumor angiogenesis. To test this hypothesis, we investigated the potential association between three VEGF polymorphisms (-460T > C, +405C > G, and 936C > T)/haplotypes and the risk of lung cancer in a Korean population. VEGF genotypes were determined in 432 lung cancer patients and 432 healthy controls that were frequency matched for age and sex. VEGF haplotypes were predicted using Bayesian algorithm in the phase program. Compared with the combined +405 CC and CG genotype, the +405 GG genotype found associated with a significantly decreased risk of small cell carcinoma [SCC; adjusted odds ratio (OR), 0.36; 95% confidence interval (95% CI), 0.17-0.78]. The 936 CT genotype and the combined 936 CT and TT genotype were also associated with a significantly decreased risk of SCC compared with the 936 CC genotype (adjusted OR, 0.47; 95% CI, 0.26-0.85 and adjusted OR, 0.44; 95% CI, 0.24-0.80, respectively). Haplotype CGT was associated with a significantly decreased risk of SCC (adjusted OR, 0.39; 95% CI, 0.18-0.87), whereas haplotype TCC conferred a significantly increased risk of SCC (adjusted OR, 1.63; 95% CI, 1.14-2.33). None of the VEGF polymorphisms studied significantly influenced the susceptibility to lung cancer except SCC. However, haplotypes TCT and TGT were significantly associated with the risk of overall lung cancer, respectively (adjusted OR, 0.38; 95% CI, 0.25-0.60 and adjusted OR, 3.94; 95% CI, 2.00-7.76, respectively). These effects of haplotypes TCT and TGT on lung cancer risk were observed in three major histologic types of lung cancer. These results suggest that the VEGF gene may be contribute to an inherited predisposition to lung cancer.     

Mutations in the tyrosine kinase domain of the epidermal growth factor receptor in non-small cell lung cancer.

We evaluated somatic genetic alterations in the kinase domain of the EGFR gene in the tumors of 219 non-small cell lung cancer patients of primarily Caucasian and African American origins. We identified 26 patients (12%) whose tumors had a mutation in the EGFR gene, and 11 (5%) patients carried novel genomic variations consistent with germ-line polymorphisms. All but one mutation were identified in Caucasian patients affected with adenocarcinoma. EGFR mutations were more frequent in women and in nonsmokers, but a significant portion of the affected patients were men (12 of 26) and current or past smokers accounted for half of the patients affected (13 of 26). Screening subjects with EGFR mutations may identify patients whose tumors could respond to targeted therapy using tyrosine kinase inhibitors.     

综合治疗继发性退变性腰椎管狭窄症62例

腰椎管狭窄症因椎管发生骨性或纤维性腰椎管狭窄致马尾神经受压损伤，表现为间歇性跛行，下腰痛，或伴有括约肌功能障碍等，其中绝大多数由继发性退变性腰椎管狭窄所致。笔者采用推拿、针灸、中药综合治疗62例，疗效明显，现报道如下。     

Treatment of 116 cases of vertebral artery type of cervical spondylopathy by electroacupuncture plus tuina

电针风池穴和C2-5夹脊穴,然后拔罐,并配合端提旋转扳法,治疗了116例椎动脉型颈椎病患者.结果治愈89例,好转21例,无效6例.总有效率94.8%.     

生化止血饮对药流后出血动物模型粘附蛋白的影响

目的：探讨生化止血饮改善药物流产后阴道出血的作用机制。方法：建立正常组，药物流产模型组，流产后缩宫素组，益母草组，生化止血饮高剂量组，生化止血饮低剂量组，采用免疫组化法检测大鼠子宫内膜（包括蜕膜）中纤维粘连蛋白（FN），层粘连蛋白（LN），孕激素受体（PR）的变化。结果：生化止血饮可显著降低PR，LN，FN的表达水平（P〈0．05），而益母草组和缩宫素组与药流模型组没有显著性差异（P〉0．05），生化止血饮的疗效优于益母草组及缩宫素组。结论：生化止血饮能通过降低子宫内膜中PR，FN，LN的水平促进蜕膜剥脱，缩短药流后阴道出血的时间，达到减少阴道出血量的目的。