Selection and identification of oridonin high yield strain and its antitumor activity / 中草药

ABSTRACT

Objective: To select and identify the endophytic fungi of Rabdosia rubescens as well as study on its antitumor activity in vitro in order to obtain the high yield strains of oridonin. Methods: Using the methods of TLC and HPLC, the oridonin high yield strain was selected from 256 strains of endophytic fungi which were isolated from the previous experiments. Oridonin of fermentation broth was determined by HPLC-MS. The strain was identified by morphological characteristics and ITS sequence methods and its antitumor activity in vitro was detected by MTT assay. Results: An oridonin high yield strain M-J-5 was obtained and identified as Penicillium oxalicum, which can inhibit the activity of human breast cancer cell line MCF-7. Conclusion: a oridonin high yield strain is obtained with antitumor activity and provides scientific basis for microbial production of oridonin and the development of new anticancer drugs.