This paper reports the first population ecology study of the endangered Magnolia sargentiana Rehder ＆ Wilson （Magnoliaceae）. Magnolia sargentiana is a protected species in China, but little is known about its prese...This paper reports the first population ecology study of the endangered Magnolia sargentiana Rehder ＆ Wilson （Magnoliaceae）. Magnolia sargentiana is a protected species in China, but little is known about its present status in the field. In 2007 and 2008, we surveyed the population and conservation status ofM. sargentiana in the Provincial Mamize Nature Reserve and the National Meigu Dafengding Nature Reserve, Sichuan Province, southwestern China. Natural regeneration is poor because of unfavorable environmental conditions and anthropogenic disturbances. Flower buds and bark ofM. sargentiana are used in traditional Chinese medicine and their collection by local people over the period 1983-1994 has led to marked population declines. The collection of flower buds and bark is now banned, but hewing branches for firewood and grazing continues to have a negative impact on the recovery of M. sargentiana populations. To protect the species, we require a ban on hewing branches, closure of primary forests to reduce the impact of humans and ungulates, better education of local people, and increased awareness of wildlife conservation.展开更多
凹叶木兰和中缅木莲在西南地区作为传统药用植物对于许多疾病有着较好的治疗价值,如行气平喘、化湿导滞、疏肝理气等功效。然而这两种传统药用植物在抗肿瘤活性方面的研究比较缺乏。因此我们利用计算机辅助药物设计(CADD)中的反向分子...凹叶木兰和中缅木莲在西南地区作为传统药用植物对于许多疾病有着较好的治疗价值,如行气平喘、化湿导滞、疏肝理气等功效。然而这两种传统药用植物在抗肿瘤活性方面的研究比较缺乏。因此我们利用计算机辅助药物设计(CADD)中的反向分子对接方法,结合PharmaDB药效团数据库对凹叶木兰、中缅木莲中所提取的18种化合物进行抗肿瘤或抗癌研究,并分析化合物与相关癌症靶标蛋白的相互作用机制。利用Discovery Studio 3.5软件的ADMET模块分析化合物的药代动力学和毒理性质。结果表明:14种化合物与相关癌症靶标蛋白具有一定结合性,其中5种化合物与相关癌症靶标蛋白结合的最好,经过药代动力学和毒理预测筛选出4种化合物在抗肿瘤活性方面具有较大潜力,值得进行下一步的药理实验。该结论为凹叶木兰和中缅木莲在抗肿瘤方面的研究提供了理论依据。展开更多
基金funded by the Foundation Franklinia of Belgium and the 111 Project of China(no.B08037).
文摘This paper reports the first population ecology study of the endangered Magnolia sargentiana Rehder ＆ Wilson （Magnoliaceae）. Magnolia sargentiana is a protected species in China, but little is known about its present status in the field. In 2007 and 2008, we surveyed the population and conservation status ofM. sargentiana in the Provincial Mamize Nature Reserve and the National Meigu Dafengding Nature Reserve, Sichuan Province, southwestern China. Natural regeneration is poor because of unfavorable environmental conditions and anthropogenic disturbances. Flower buds and bark ofM. sargentiana are used in traditional Chinese medicine and their collection by local people over the period 1983-1994 has led to marked population declines. The collection of flower buds and bark is now banned, but hewing branches for firewood and grazing continues to have a negative impact on the recovery of M. sargentiana populations. To protect the species, we require a ban on hewing branches, closure of primary forests to reduce the impact of humans and ungulates, better education of local people, and increased awareness of wildlife conservation.
文摘凹叶木兰和中缅木莲在西南地区作为传统药用植物对于许多疾病有着较好的治疗价值,如行气平喘、化湿导滞、疏肝理气等功效。然而这两种传统药用植物在抗肿瘤活性方面的研究比较缺乏。因此我们利用计算机辅助药物设计(CADD)中的反向分子对接方法,结合PharmaDB药效团数据库对凹叶木兰、中缅木莲中所提取的18种化合物进行抗肿瘤或抗癌研究,并分析化合物与相关癌症靶标蛋白的相互作用机制。利用Discovery Studio 3.5软件的ADMET模块分析化合物的药代动力学和毒理性质。结果表明:14种化合物与相关癌症靶标蛋白具有一定结合性,其中5种化合物与相关癌症靶标蛋白结合的最好,经过药代动力学和毒理预测筛选出4种化合物在抗肿瘤活性方面具有较大潜力,值得进行下一步的药理实验。该结论为凹叶木兰和中缅木莲在抗肿瘤方面的研究提供了理论依据。
