摘要
目的：从胡桃楸树皮部分离抗癌活性菌株，筛选抗癌活性菌株，进行菌种鉴定，并对其发酵产物体外抗癌活性进行初步研究。方法：采用菌丝顶端纯化法从胡桃楸树皮部分离、纯化抗癌活性菌株；以MTT法对上述活性菌株发酵液体外抗癌活性进行初步评价；形态学观察结合ITS序列分析法对筛选出的高抗癌活性菌株进行了菌种鉴定；单独对高抗癌活性菌株进行了体外抗癌活性试验。结果：分离得到FSN001—014共14株内生真菌，初步评价发现菌株FSN006具有较强的抗癌活性，鉴定为半知菌亚门，丝孢纲，丛梗孢目，木霉菌属长枝木霉。MTT结果显示FSN006发酵液对人肝癌HepG2细胞具有明显的生长抑制作用，在稀释20倍后仍能达到半数抑制效果。同等条件下阳性对照药姜黄素的IC50为11．49mg·L^-1。同时发酵液对正常肝细胞HL-7702的抑制程度仅相当于癌细胞抑制率的I／4左右，表现出较好的癌细胞选择性，有望开发成一种水溶性的高效低毒的抗癌药物。结论：胡桃楸树皮部存在多种内生真菌，其中分离得到的一个菌株具有较强的抗癌活性；其抗癌活性成分及其是否与胡桃楸中抗癌活性物质存在相关性等问题有待进一步深入研究。
The endophytic fungus named FSN006 was isolated from the inner bark of Juglans mandshurica. It grew quickly and formed circular colony on PDA plate. The upper side of the colony was white, while the lower side of the colony and the conditioned medium were light yellow as a result of significant yellow pigment substances were produced and secreted by the fungi. Green elliptic conidia appeared when cultured on CMX plate. Based on the morphology identification and ITS sequence, it was clear that this fungus belonged to the Deuteromycotina, HyPhomycetes, Moniliales, Trichoderma longibrachiatum. The conditioned medium of FSN006 showed a high anti - tumor abihty against liver cancer cell-HepG2, and reached its IC50 concentration after being diluted 20 times, while the IC50 concentration of curcumine was （11.49 ± 0.12 ） mg · L^-1. In addition, there was preeminent selective inhibiting effect against the normal liver cell strain HL-7702 and its caner counter strain HepG2. The inhibiting effect against strain HL-7702 was only one quarter of that against HepG2 at the concentration of IC50. Therefore, the fermentation of FSN006 may provide a possible way to produce anticancer drug with higher efficiency and lower toxicity.
出处
《中国中药杂志》
CAS
CSCD
北大核心
2009年第13期1623-1627,共5页
China Journal of Chinese Materia Medica
基金
国家自然科学基金项目(30700061)
国家高技术研究发展计划(863)重点项目(2007AA021501)
关键词
胡桃楸
内生真菌
发酵液
抗肿瘤
Juglans mandshurica
endophytic fungus
fermentaltion broth
anti-tumor
