title: Measurement of serum estrogen and estrogen metabolites in pre- and postmenopausal women with osteoarthritis using high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry.
abstract: Although 17β-estradiol (E2) deficiency has been linked to the development of osteoarthritis (OA) in middle-aged women, there are few studies relating other estrogens and estrogen metabolites (EMs) to this condition. We developed a high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry (HPLC-ESI-MS/MS) method to measure the levels of six EMs (i.e., estrone, E2, estriol, 2-hydroxyestrone, 2-hydroxyestradiol, and 16a-hydroxyestrone) in healthy pre- and postmenopausal women and women with OA. This method had a precision ranging from 1.1 to 3.1% and a detection limit ranging from 10 to 15 pg. Compared to healthy women, serum-free E2 was lower in the luteal and postmenopausal phases in women with OA, and total serum E2 was lower in postmenopausal women with OA. Moreover, compared to healthy women, total serum 2-hydroxyestradiol was higher in postmenopausal women with OA and total serum 2-hydroxyestrone was lower in both the luteal and follicular phases in women with OA. In conclusion, our HPLC-ESI-MS/MS method allowed the measurement of multiple biochemical targets in a single assay, and, given its increased cost-effectiveness, simplicity, and speed relative to previous methods, this method is suitable for clinical studies.
authors.affiliation: Department of Orthopedics, Linyi People's Hospital of Shandong Province, Linyi, China.
authors.forename: W L
authors.initials: WL
authors.lastname: Gao
authors.affiliation: Department of Orthopedics, Linyi People's Hospital of Shandong Province, Linyi, China.
authors.forename: L S
authors.initials: LS
authors.lastname: Wu
authors.affiliation: Department of Orthopedics, Linyi People's Hospital of Shandong Province, Linyi, China.
authors.forename: J H
authors.initials: JH
authors.lastname: Zi
authors.affiliation: Department of Orthopedics, Linyi People's Hospital of Shandong Province, Linyi, China.
authors.forename: B
authors.initials: B
authors.lastname: Wu
authors.affiliation: Guangdong Institute for Drug Control, Guangzhou, Guangdong, China.
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Li
authors.affiliation: Department of Orthopedics, the Third Affiliated Hospital of Southern Medical University, Guangzhou, China.
authors.forename: Y C
authors.initials: YC
authors.lastname: Song
authors.affiliation: Department of Orthopedics, the Third Affiliated Hospital of Southern Medical University, Guangzhou, China.
authors.forename: D Z
authors.initials: DZ
authors.lastname: Cai
mesh_terms: D000328:Adult; D000368:Aged; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004958:Estradiol / Q000031:analogs & derivatives / Q000097:blood; D004964:Estriol / Q000097:blood; D004967:Estrogens / Q000097:blood* / Q000378:metabolism; D004970:Estrone / Q000097:blood; D005260:Female; D005498:Follicular Phase / Q000097:blood; D006801:Humans; D006894:Hydroxyestrones / Q000097:blood; D057230:Limit of Detection; D008183:Luteal Phase / Q000097:blood; D008875:Middle Aged; D010003:Osteoarthritis / Q000097:blood* / Q000378:metabolism; D017698:Postmenopause / Q000097:blood* / Q000378:metabolism; D017697:Premenopause / Q000097:blood* / Q000378:metabolism; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D018709:Statistics, Nonparametric
chemical_list: D004967:Estrogens; D006894:Hydroxyestrones; C026702:16-hydroxyestrone; D004970:Estrone; D004958:Estradiol; C001390:2-hydroxyestradiol; D004964:Estriol; C024980:2-hydroxyestrone