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LC-ESI-MS/MS Method for the Simultaneous Determination of Isoformononetin, Daidzein, and Equol in Rat Plasma: Application to a Preclinical Pharmacokinetic Study

LC-ESI-MS/MS Method for the Simultaneous Determination of Isoformononetin, Daidzein, and Equol in Rat Plasma: Application to a Preclinical Pharmacokinetic Study

Kanumuri Siva Rama Raju, Mamunur Rashid, Manoj Gundeti, Isha Taneja, Mohd Yaseen Malik, Sandeep Kumar Singh, Swati Chaturvedi, Muralikrishna Challagundla, Sheelendra Pratap Singh, J R Gayen, Muhammad Wahajuddin

J Chromatogr B Analyt Technol Biomed Life Sci. 2019 Oct 15;1129:121776.

PMID: 31629309

Abstract:

Isoformononetin (methoxy isoflavone) is a potent osteogenic isoflavone abundantly present in Butea monosperma, Pisum sativum, Mung bean, Machaerium villosum, Medicago sativa, and Glycine max. In the current study, an LC-ESI-MS/MS method for the simultaneous evaluation of isoformononetin (IFN), daidzein (DZN) and equol (EQL) was developed and validated in rat plasma using biochanin A as an internal standard. IFN, DZN, and EQL separation was achieved by using acetonitrile and acetic acid (0.1%) in the ratio of 90:10 (% v/v) as mobile phase under isocratic conditions at a flow rate of 0.6 mL/min on Atlantis C18 (4.6 × 250 mm, 5.0 μm) column. The achieved method was linear within the concentration range of 0.5-500 ng/mL. The method was effectively applied to investigate the permeability, protein binding estimation and pharmacokinetics studies of IFN in rats. The PAMPA permeability of IFN was found to be high at pH 4.0 and 7.0. The protein binding was found to be about 91% of IFN. The oral bioavailability of IFN was found to be poor (21.6%). IFN was found to have a moderate clearance (2.9 L/h/kg) and a large apparent volume of distribution (12.1 L/kg). The plasma half-life (t1/2) and maximum attainable concentration (Cmax) of IFN at systemic circulation was found to be 1.9 ± 0.6 h and 269.3 ± 0.4 after oral administration.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP486635	Isoformononetin		486-63-5	Price

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