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Relevance of the selective oestrogen receptor modulators tamoxifen, toremifene and clomiphene in doping field: endogenous steroids urinary profile after multiple oral doses.
- Source :
-
Steroids [Steroids] 2011 Nov; Vol. 76 (12), pp. 1400-6. Date of Electronic Publication: 2011 Jun 30. - Publication Year :
- 2011
-
Abstract
- The present study was performed to investigate the influence of the intake of selective oestrogen receptor modulators on the urinary endogenous steroids profile. For this purpose the circadian variability of luteinizing hormone, follicle-stimulating hormone, testosterone, 5α-androstan-3α,17β-diol, 5β-androstan-3α,17β-diol, epitestosterone, 4-androstenedione, androsterone and etiocholanolone were measured on eight subjects (four males and four females) by gas chromatography-mass spectrometry and chemiluminescent immunometric assay techniques before and after oral administration of multiple doses of either tamoxifen (80 mg for 2 days) or toremifene (120 mg for 2 days) or clomiphene (100 mg for 2 days). The individual baseline variability of the steroids studied was set up by collecting the urine samples every 3 h, for 3 days prior to the treatment; whereas the evaluation of the effects of the oral administration of multiple doses of selective oestrogen receptor modulators on the steroid urinary profile was assessed by collecting urine samples every three hours for at least five days from the first administration. The results of our measurements showed that, only in male subjects, the relative urinary concentrations of testosterone, epitestosterone and 4-androstenedione were significantly altered generally after the second day of drug administration. While no significant effects were recorded in both sexes on the luteinizing hormone, follicle-stimulating hormone, androsterone, etiocholanolone, 5α-androstan-3α,17β-diol and 5β-androstan-3α,17β-diol urinary levels and on testosterone/epitestosterone, 5α-androstan-3α,17β-diol/5β-androstan-3α,17β-diol and androsterone/etiocholanolone ratios.<br /> (Copyright © 2011 Elsevier Inc. All rights reserved.)
- Subjects :
- Administration, Oral
Adult
Androgens urine
Biomarkers urine
Female
Humans
Male
Reference Standards
Sex Factors
Substance Abuse Detection
Androstenedione urine
Clomiphene administration & dosage
Doping in Sports
Epitestosterone urine
Performance-Enhancing Substances administration & dosage
Selective Estrogen Receptor Modulators administration & dosage
Tamoxifen administration & dosage
Testosterone urine
Toremifene administration & dosage
Subjects
Details
- Language :
- English
- ISSN :
- 1878-5867
- Volume :
- 76
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Steroids
- Publication Type :
- Academic Journal
- Accession number :
- 21745489
- Full Text :
- https://doi.org/10.1016/j.steroids.2011.06.005