| Literature DB >> 22981216 |
Estatira Sepehr1, Marketa Lebl-Rinnova, Meagan K Mann, Samantha L Pisani, Mona I Churchwell, Donna L Korol, John A Katzenellenbogen, Daniel R Doerge.
Abstract
Estrogen receptor (ER) subtype specific agonists, diarylpropionitrile (DPN) for ERβ and propylpyrazoletriol (PPT) for ERα, are pharmacological probes used frequently to define mechanisms for estrogen actions in vitro and in vivo. Quantitative analytical methodology was developed and validated for DPN and PPT, based on synthetic stable labeled analogs (DPN-d(4) and PPT-d(5)) using isotope dilution liquid chromatographic tandem electrospray mass spectrometric detection. The validated method produced high sensitivity, with detection limits of 0.04-0.07ng/ml serum. Serum pharmacokinetics were evaluated in Long-Evans rats following a single subcutaneous injection (2mg/kg bw) of both compounds. The role of Phase II metabolism was evaluated using β-glucuronidase and arylsulfatase hydrolysis to measure total DPN and PPT in addition to the parent compounds. The pharmacokinetic properties of DPN and PPT reported could facilitate experimental designs requiring specified levels of receptor occupancy for quantitative comparisons of ER subtype specificities for natural and synthetic estrogens in vivo. Published by Elsevier B.V.Entities:
Mesh：
Substances：
Year: 2012 PMID： 22981216 PMCID： PMC3509942 DOI： 10.1016/j.jpba.2012.08.022
Source DB: PubMed Journal: J Pharm Biomed Anal ISSN： 0731-7085 Impact factor: 3.935