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城区飞散致敏花粉与大气细/超细颗粒物的协同生物效应研究 被引量:12
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作者 吕森林 王青躍 +4 位作者 吴明红 冯满 Nakmura Shinichi 王效举 Yonemochi Shinichi 《环境科学》 EI CAS CSCD 北大核心 2010年第9期2260-2266,共7页
城市大气颗粒物污染和致敏花粉的污染已经对人群健康和城市空气质量产生了较为严重的影响.这2种污染物的协同生物效应正在成为大气环境科学、环境毒理学、免疫学等学科研究的前沿和热点研究领域.以上海大气中的细/超细颗粒物和日本关东... 城市大气颗粒物污染和致敏花粉的污染已经对人群健康和城市空气质量产生了较为严重的影响.这2种污染物的协同生物效应正在成为大气环境科学、环境毒理学、免疫学等学科研究的前沿和热点研究领域.以上海大气中的细/超细颗粒物和日本关东地区致敏花粉(柳杉)为例,阐述了大气细/超细颗粒物的表征以及花粉致敏的过程.在研究中,观察到了日本柳杉花粉壁附着有直径<0.7μm的含变应原蛋白的微粒(Ubisch body),并用ELISA法揭示了日本关东地区大气颗粒物中含变应原蛋白的颗粒主要分布在<1μm的粒径范围内;而在上海大气颗粒物中,化学元素总量的最大值出现在细/超细粒径颗粒物(0.3~0.18μm)范围,污染元素S和Pb的质量浓度在超细(纳米尺度)/细颗粒物中比在其他粒径范围颗粒物中要高,另外还发现在上海大气颗粒物中有植物花粉的存在.城市大气颗粒物中的主要组分,柴油机车尾气颗粒物(DEPs)与飞散花粉之间存在协同生物效应,但其机制和过程还不清楚,在最新研究成果的基础上并结合国内外相关研究领域的进展,对飞散花粉与大气细/超细颗粒物的协同生物效应的研究进行了总结并提出今后研究的方向. 展开更多
关键词 城市大气细/超细颗粒物 化学元素 飞散致敏花粉 变应原蛋白 协同生物效应
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IL-15R α生物协同作用的体外细胞学评价
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作者 范俊 杨润琳 +2 位作者 蒋孟军 曹国宪 李文新 《中国血液流变学杂志》 CAS 2008年第3期320-324,共5页
目的在细胞水平对IL-15R α的生物协同效应进行观察和评价。方法以IL-15敏感细胞株CTLL-2为靶细胞,采用MTT法检测细胞的活性及增殖情况,在摸清CTLL-2细胞增殖同IL-15之间的剂量依赖关系的基础上,分别在中、低剂量上观察经倍比稀释后的IL... 目的在细胞水平对IL-15R α的生物协同效应进行观察和评价。方法以IL-15敏感细胞株CTLL-2为靶细胞,采用MTT法检测细胞的活性及增殖情况,在摸清CTLL-2细胞增殖同IL-15之间的剂量依赖关系的基础上,分别在中、低剂量上观察经倍比稀释后的IL-15R α对IL-15体外细胞学活性的影响,其间还分别观察了IL-15R α单独作用以及IL-15R α和IL-15特异性抗体介入对CTLL-2细胞增殖的影响。结果CTLL-2细胞增殖同IL-15之间有着显著的剂量依赖关系;在50ng/mL的IL-15适中浓度下,1ng/mL的IL-15R α可以显著促进靶细胞的增殖(0.270±0.008vs.0.593±0.026,P<0.05);10ng/mL的IL-15临界浓度下,同样浓度的IL-15R α可使靶细胞产生近100倍的增殖(0.005±0.017vs.0.498±0.060,P<0.05);10ng/mL和50ng/mL的IL-15浓度下,IL-15R α发挥最大生物协同效应的浓度分别为7.81ng/mL和15.63ng/mL;单独IL-15R α没有促靶细胞的增殖效应,抗IL-15和IL-15R α的特异性抗体可有效阻断IL-15/IL-15Rα之间的协同作用。结论IL-15R α能够特异地通过IL-15发挥生物协同效应,该效应在低IL-15浓度下表现得尤为明显,IL-15/IL-15R α间适宜的配伍比例是确保该协同效应最大程度发挥的关键。 展开更多
关键词 IL-15 IL-15R α 生物协同效应
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Research progress on synergistic anti-tumor mechanisms of compounds inTraditional Chinese Medicine 被引量:16
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作者 Jing Zhou Tianyao Zhou +5 位作者 Meijuan Chen Miao Jiang Xiaoxia Wang Qin Liu Zhen Zhan Xu Zhang 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2014年第1期100-105,共6页
The curative effects of Chinese herbal compounds result from the coordination of numerous natural compounds.We aimed to review the mechanism of action of Traditional Chinese Medicine(TCM)compounds(TCMC),explore the ra... The curative effects of Chinese herbal compounds result from the coordination of numerous natural compounds.We aimed to review the mechanism of action of Traditional Chinese Medicine(TCM)compounds(TCMC),explore the rationality of formulation theory and synergistic effects in TCM compounds,and analyze the effectiveness of drug compatibility of TCMC in molecular biology.This literature review covers the mechanisms of the anti-tumor effects of compounds,and their synergistic antitumor mechanisms.We aim to provide reference for the effective development and use of natural resources and the organic combination of TCM and modern medicine using molecular biology. 展开更多
关键词 COMPOUNDS Traditional medicine Chi-nese Molecular biology MONOMER
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Design,synthesis,and biological evaluation of novel benzimidazole derivatives and their interaction with calf thymus DNA and synergistic effects with clinical drugs 被引量:5
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作者 ZHANG HuiZhen LIN JianMei +1 位作者 RASHEED Syed ZHOU ChengHe 《Science China Chemistry》 SCIE EI CAS 2014年第6期807-822,共16页
A series of new benzimidazole derivatives was synthesized and characterized by IR,1H NMR,13C NMR,MS,and HRMS spectra.All the new compounds were screened for their antimicrobial activities in vitro by a twofold serial ... A series of new benzimidazole derivatives was synthesized and characterized by IR,1H NMR,13C NMR,MS,and HRMS spectra.All the new compounds were screened for their antimicrobial activities in vitro by a twofold serial dilution technique.The bioactive evaluation showed that 3,5-bis(trifluoromethyl)phenyl benzimidazoles were comparably or even more strongly antibacterial and antifungal than the reference drugs Chloromycin,Norfloxacin,and Fluconazole.The combination of2,4-difluorobenzyl benzimidazole derivative 5l and its hydrochloride 7 respectively with the antibacterials Chloromycin,Norfloxacin,and the antifungal Fluconazole was more sensitive to methicillin-resistant MRSA and Fluconazole-insensitive A.flavus.In addition,the interaction of compound 5l with calf thymus DNA demonstrated that this compound could effectively intercalate into DNA to form a compound 5l-DNA complex that might block DNA replication and thereby exert good antimicrobial activity. 展开更多
关键词 BENZIMIDAZOLE ANTIBACTERIAL ANTIFUNGAL calf thymus DNA synergistic effect
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