烟曲霉GZWMJZ-152茶粕发酵代谢产物

Secondary metabolites of Aspergillus fumigatus GZWMJZ-152 cultivated on Camellia seed cake medium

在茶粕培养基摇床培养条件下,烟曲霉GZWMJZ-152将茶粕中的山茶苷A (1)和山茶苷B (2)代谢为山奈酚-3-O-芸香糖苷(3);在茶粕培养基静置发酵条件下,从发酵提取物中分离得到5个化合物,分别为山奈酚(4)、(-)Chaetominine (5)、trypacidin (6)、1,2-seco-trypacidin (7)、(-)-丁香脂素(8)。测试了8个化合物的α-葡萄糖苷酶抑制活性和DPPH自由基清除活性,其中化合物1–3,5–8具有较好的α-葡萄糖苷酶抑制活性,IC_(50)值在133.9–308.6μg/mL;化合物1,4,8具有较好的自由基清除活性,IC_(50)值在0.43–5.06μg/mL。

Aspergillus fumigatus GZWMJZ-152 can hydrolyze camelliaside A(1) and camelliaside B(2) into kaempferol 3-O-rutinoside(3) under the condition of shaking fermentation using Camellia seed cake medium.Five compounds, kaempferol(4),(-)chaetominine(5), trypacidin(6), 1,2-seco-trypacidin(7) and(-)-syringaresinol(8), were isolated under the condition of solid static fermentation on the same medium. The inhibitory effects of eight compounds on α-glycosidase and DPPH free radical scavenging activity were tested. Compounds 1–3, 5–8 exhibited α-glycosidase inhibitory activity with IC50 values ranging from 133.9 to 308.6μg/mL. Compounds 1, 4, 8 exhibited radical scavenging activity against DPPH with IC50 values ranging from 0.43 to 5.06μg/mL.