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DOI: 10.1055/s-0037-1614347
Platelet-vessel Wall Interactions with Third-generation Oral Contraceptives: No Evidence of Detrimental Effects
Publikationsverlauf
Received
26. Mai 1998
Accepted
26. April 1999
Publikationsdatum:
09. Dezember 2017 (online)
![](https://www.thieme-connect.de/media/10.1055-s-00035024/199903/lookinside/thumbnails/10-1055-s-0037-1614347-1.jpg)
Summary
Because of the association of oral contraceptives (OC) and cigarette smoking with an increased thrombotic risk, we evaluated thromboxane (TX) and prostacyclin urinary (u) metabolites, as in vivo indices of platelet-vessel wall interactions, in women assigned to third generation OC. Twenty-eight women (15 smokers) underwent a 6-month trial of 30 μg ethinylestradiol plus 0.150 mg desogestrel. Cotinine plasma levels were elevated only in persons classified as smokers and serum TXB2 determination confirmed the absence of cyclooxygenase inhibition throughout the study. u-TXB2 and 11-dehydro-TXB2 were higher in smokers than in non-smokers. OC decreased u-11-dehydro-TXB2 both in smokers (from (pg/μmol creatinine) 35.1 ± 6.9 to 15.8 ± 2.8; P <0.025) and non-smokers (from 31.7 ± 9.8 to 20.6 ± 4.8, P = N.S.). u-6-keto-prostaglandin(PG)F1α excretion, also higher in smokers compared to non-smokers, was also reduced after OC in smokers (from (pg/μmol creatinine) 24.3 ± 5.2 to 14.8 ± 2.3; P <0.05). Smokers also had a trend to higher u-2,3-dinor-6-keto-PGF1α, marginally reduced by OC.
Thus, the OC regimen used here improves – if anything – platelet vessel wall interactions as assessed by prostanoid production in vivo. The prothrombotic tendency associated with the use of OC in smokers does not appear to be mediated by changes in platelet-vessel wall interactions.
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