熊果酸对胃癌细胞株SGC-7901的抑制作用

目的：本文通过不同浓度的熊果酸（ursolic acid,UA）作用于人胃癌SGC-7901细胞,探讨UA对其生长的影响。方法：采用体外培养人胃癌细胞株SGC-7901,MIT法观察不同浓度UA对细胞生长的影响;用10μmoL／L,20μmoL／L,40μmoL／L和80μmoL／L不同浓度UA处理SGC-7901细胞12h后,倒置显微镜观察细胞形态变化以及MTT检测细胞的生长情况。结果：在细胞抑制实验中20～40μmoL／L UA可使SGC-7901细胞发生皱缩,40—80μmoL／LuA作用12h后,SGC-7901细胞形态明显变圆,出现不同程度的漂浮;同时MTT实验结果表明,不同浓度的UA能抑制SGC-7901细胞的生长并呈浓度依赖性。结论：UA能够抑制SGC-7901细胞的生长,具有较强的抗肿瘤活性。     

脑瘤克胶囊抑癌抗转移实验研究

目的探讨脑瘤克胶囊对小鼠移植性肿瘤生长及转移的影响。方法采用昆明种小鼠复制肝癌H22腹水转实体瘤模型,ICR小鼠复制肉瘤S180模型,观察脑瘤克对小鼠移植性肿瘤的生长的影响;采用C57BL/6小鼠复制Lewis肺癌模型,观察脑瘤克对其自发性肺转移的抑制作用。结果脑瘤克各剂量组能明显抑制肝癌H22腹水转实体瘤瘤体的生长,与对照组比较均有统计学意义(P<0.01,P<0.05);其对肉瘤S180瘤体生长有明显抑制作用,与对照组比较有统计学意义(P<0.01,P<0.05);脑瘤克各组可明显抑制肺转移灶数目,与模型对照组比较有统计学意义(P<0.01)。结论脑瘤克胶囊对肝癌H22腹水转实体瘤、肉瘤S180有一定的抑制作用,能显著抑制Lewis肺癌的自发性肺转移灶数目。      

茶多酚抗肿瘤研究进展与前景分析

茶叶具有清头目,除烦渴,化痰,消食,利尿,解毒功能。可治疗头痛、目昏、多睡善寐、心烦口渴、食积痰滞、疟、痢等病证。茶叶主要活性成分为茶多酚,现代研究表明,茶多酚除有抗衰老、预防心脑血管疾病外,还具有细胞毒作用、诱导肿瘤细胞调亡与分化、抗畸变、抗癌症转移等综合效应。因此,我们认为,茶多酚在抗肿瘤方面具有广阔的应用前景与深入研究的价值。      

乳源免疫调节肽体外抑制人卵巢癌细胞侵袭和转移

目的探讨乳源免疫调节肽(PGPIPN)对人卵巢癌细胞株(SKOV3)侵袭和转移的影响。方法 Transwell小室测定其侵袭力和迁移力,细胞划痕实验测定细胞运动能力,细胞克隆形成实验观察SKOV3的克隆形成能力,用MTT法比较PGPIPN对SKOV3、人正常肝细胞株LO2和小鼠永生化成纤维细胞株(MEFS)的生长抑制情况,检测PGPIPN的细胞毒性。结果 Transwell试验中,与空白对照组相比,浓度为1 mg.L-1和10 mg.L-1的PGPIPN明显抑制了SKOV3的侵袭和转移(P<0.01),抑制率分别为20.20%和23.78%;划痕实验显示对细胞的运动能力得到了明显的抑制;平板法的克隆形成实验结果较明显,与空白对照组相比,1 mg.L-1和10 mg.L-1的PGPIPN抑制率分别为32.50%和38.11%;PGPIPN抑制SKOV3细胞生长,对正常细胞无明显影响。结论乳源免疫调节肽能够抑制人卵巢癌细胞的侵袭和转移。     

Effects of Probenecid on Hepatic and Renal Disposition of Hexadecanedioate,an Endogenous Substrate of Organic Anion Transporting Polypeptide 1B in Rats

The aim of the present study was to investigate changes in plasma concentrations and tissue distribution of endogenous substrates of organic anion transporting polypeptide (OATP) 1B, hexadecanedioate (HDA), octadecanedioate (ODA), tetradecanedioate (TDA), and coproporphyrin-III, induced by its weak inhibitor, probenecid (PBD), in rats. PBD increased the plasma concentrations of these four compounds regardless of bile duct cannulation, whereas liver-to-plasma (K_p,liver) and kidney-to-plasma concentration ratios of HDA and TDA were reduced. Similar effects of PBD on plasma concentrations and K_p,liver of HDA, ODA, and TDA were observed in kidney-ligated rats, suggesting a minor contribution of renal disposition to the overall distribution of these three compounds. Tissue uptake clearance of deuterium-labeled HDA (d-HDA) in liver was 16-fold higher than that in kidney, and was reduced by 80% by PBD. This was compatible with inhibition by PBD of d-HDA uptake in isolated rat hepatocytes. Such inhibitory effects of PBD were also observed in the human OATP1B1-mediated uptake of d-HDA. Overall, the disposition of HDA is mainly determined by hepatic OATP-mediated uptake, which is inhibited by PBD. HDA might, thus, be a biomarker for OATPs minimally affected by urinary and biliary elimination in rats.     

神经元放射状迁移分子的研究进展

神经元放射状迁移是神经元迁移的主要方式,其对大脑皮质板层结构的形成非常重要。随着对皮层神经元放射状迁移研究的深入,越来越多的神经元放射状迁移相关分子得以发现,使神经元放射状迁移这一复杂而精确过程的调控机制也越来越明朗。神经元放射状迁移分子主要分为两类,一类是下调相关分子表达后抑制了放射状迁移,另一类则下调相关分子表达后增强了放射状迁移。本文对近年来新发现的神经元放射状迁移相关分子进行综述。     

西替利嗪和特非拉丁对皮试风团抑制指数的影响

目的：了解西替利嗪对荨麻疹风团抑制的作用。方法：采用随机设计,以西替利嗪治疗为实验组,以特非拉丁治疗为对照组,对６０例慢性尊麻疹患者,进行尘螨皮试诱发风团抑制情况的对比研究。结果：服药前两组间的风团面积无显著性差异。服用２周时,西替利嗪组对风团的抑制明显优于特非拉丁组,差异具显著性（Ｐ＜０．０５）。通过进一步的剂量一反应关系研究,曲线拟合所确定的风团抑制指数表明,前者的抑制作用是后者的９倍。结论：西替利嗪对风团抑制的作用优于特非拉丁。     

Liu-He-Tang inhibited plaque formation by human respiratory syncytial virus infection in cell lines of the human respiratory tract

Ethnopharmacological relevance

Liu-He-Tang (LHT) has been used to treat adult respiratory tract infection with productive cough and fever for a thousand years in ancient China. Adults with respiratory tract infection of human respiratory syncytial virus (HRSV) can have symptoms similar to those managed by LHT. Therefore, LHT is supposed to be beneficial for adult HRSV infection. However, LHT does not have any antiviral activity to support its use against HRSV infection.

Aim of the study

HRSV is the most important virus causing serious pediatric respiratory tract infections worldwide. HRSV also contributes considerably to respiratory tract illness in adults. There is no effective therapeutic modality against HRSV infection. In order to find readily available agents to manage adult HRSV infection, this study tested the hypothesis that LHT has antiviral activity against HRSV-induced cytopathy.

Materials and methods

Effect of the hot water extract of LHT on HRSV was tested by plaque reduction assay in both human upper (HEp-2) and low (A549) respiratory tract cell lines and also a human normal fibroblast cell line (WI-38). Ability of LHT to stimulate anti-viral cytokines was evaluated by enzyme-linked immunosorbent assay (ELISA).

Results

LHT could dose-dependently inhibit HRSV-induced plaque formation (p < 0.0001), especially in A549 cell. 300 μg/ml LHT nearly abolished plaque formation in A549 cells. LHT was more effective when given before viral inoculation (p < 0.0001). LHT dose-dependently inhibited viral attachment (p < 0.0001). Besides, LHT could inhibit HRSV internalization both time-dependently and dose-dependently (p < 0.0001). Furthermore, LHT stimulated epithelial cells to secrete IFN-β and TNF-α to counteract HRSV infection before infection becomes established.

Conclusions

LHT has anti-HRSV activity that provides a basic support of its possible use in managing adult HRSV infection.     

Ge-Gen-Tang has anti-viral activity against human respiratory syncytial virus in human respiratory tract cell lines

Ethnopharmacological relevance

Ge-Gen-Tang (GGT) has been used against adult respiratory tract infection for thousand years in ancient China. However, GGT is unable to inhibit influenza virus. The effect of GGT to manage respiratory tract viral infection has been questioned. Several ingredients of GGT and their constituents are able to inhibit various viruses. Therefore, GGT might have antiviral activity against other viruses causing respiratory tract illness. Human respiratory syncytial virus (HRSV) is one of the most important airway viruses. However, it is unknown whether GGT is effective against HRSV.

Aim of the study

HRSV contributes considerably to respiratory tract illness of the elderly and immunocompromised adults. There is no effective therapeutic modality for HRSV infection. In order to find a readily available agent to manage HRSV infection, the authors tested the hypothesis that GGT can effectively minimize airway pathology by preventing HRSV-induced plaque formation in respiratory mucosal cell lines.

Materials and methods

Effect of the hot water extract of GGT on HRSV was tested by plaque reduction assay in both human upper (HEp-2) and low (A549) respiratory tract cell lines. Ability of GGT to stimulate anti-viral cytokines was evaluated by enzyme-linked immunosorbent assay (ELISA).

Results

GGT dose-dependently inhibited HRSV-induced plaque formation in both cell lines (p < 0.0001), especially in A549 cells. GGT was more effective when given before viral infection (p < 0.0001). GGT could dose-dependently inhibit viral attachment (p < 0.0001) with or without heparin. GGT could further inhibit HRSV internalization time-dependently and dose-dependently (p < 0.0001). GGT could stimulate mucosal cells to secrete IFN-β to counteract viral infection before and after viral inoculation.

Conclusions

GGT is effective against HRSV-induced plaque formation in airway epithelium.     

铅、镉、砷污染地区人群免疫功能检测分析

目的探讨铅锌矿矿区铅镉砷混合接触对不同暴露人群机体免疫状况的影响。方法选择铅锌矿矿区矿工、矿区居民和无污染地区居民3组人群共96人作为研究对象,对3组人群所处环境中的铅、镉、砷含量,人体血液和尿液的铅、镉、砷含量以及人体免疫学指标进行分析。结果矿工组血中铅、镉、砷含量几何均数分别为216.57,5.04,58.65μg/L,矿区居民组血中铅、镉、砷含量几何均数分别为143.62,2.42,33.24μg/L,均高于对照人群,几何均数分别为81.54,1.18,11.50μg/L(P<0.01)。3组人群尿液中的各种毒物差异有统计学意义(P<0.01)。矿工和矿区居民的免疫功能相对于对照组均有不同程度的下降(P<0.01)。结论接触铅、镉和砷的矿区矿工和居民免疫功能受到了不同程度的损害。