Increased miroestrol, deoxymiroestrol and isoflavonoid accumulation in callus and cell suspension cultures of Pueraria candollei var. mirifica
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Miroestrol and deoxymiroestrol are highly active phytoestrogens derived from the tuberous roots of Pueraria candollei var. mirifica. To date, there have been no reports regarding the production of miroestrol and deoxymiroestrol in in vitro cell culture. In this study, callus and cell suspension cultures were established for the purpose of investigating miroestrol and deoxymiroestrol content in P. candollei var. mirifica cells. Stem-derived callus cultured on Murashige and Skoog (MS) medium supplemented with 0.1 mg l−1 thidiazuron (TDZ), 0.5 mg l−1 naphthaleneacetic acid (NAA), and 1.0 mg l−1 benzyladenine (BA) provided optimal conditions for the accumulation of deoxymiroestrol and total isoflavonoids. The calli produced 184.83 ± 20.09 μg g−1 dry weight of total chromene and 20.72 ± 2.38 mg g−1 dry weight of total isoflavonoid. This is the first report to suggest that callus culture is a suitable alternative method for producing miroestrol and deoxymiroestrol. Carbon sources were evaluated for the cell suspension cultures of P. candollei var. mirifica. Sucrose provided optimal conditions for biomass production, whereas fructose was the most suitable carbon source for deoxymiroestrol and isoflavonoid production. The information from our study can be employed for enhancing the production of miroestrol, deoxymiroestrol, and total isoflavonoids using in vitro cell culture of P. candollei var. mirifica.
KeywordsDeoxymiroestrol Miroestrol Isoflavonoid Callus culture Cell suspension culture
0.2% Gelatin in phosphate-buffered saline
0.05% Tween 20 in phosphate-buffered saline
This work was supported by a grant from the Office of the Higher Education Commission. Latiporn Udomsuk (CHE 510636) received a CHE-Ph.D. scholarship. The Thailand Research Fund (RSA5280012) is gratefully acknowledged. We also thank Dr. Chaiyo Chaichantipyuth, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand, for providing purified miroestrol and deoxymiroestrol.
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