Influence of augmented Hageman factor (Factor XII) titers on the cryoactivation of plasma prorenin in women using oral contraceptive agents.
J Clin Invest
; 72(5): 1833-8, 1983 Nov.
Article
em En
| MEDLINE
| ID: mdl-6355187
ABSTRACT
PIP: Prolonged cold storage of plasma may induce the conversion of plasma prorenin (inactive renin) to renin. This phenomenon is exaggerated in oral contraceptive (OC) users; the titer of Hageman factor (HF, Factor 12) in OC users is higher than in nonusers. The present study relates these observations. The increment in plasma renin activity (PRA) during cold storage, as measured by generation of angiotensin I, correlated strongly with the initial plasma titer of HF. Increasing the HF titer of nonusers to that observed in OC users by the addition of purified HF increased cold-induced PRA at least 2-fold, while reducing the plasma HF titer of OC users correspondingly decreased cold-induced PRA. Thus, in OC users, the enhanced conversion of plasma prorenin to renin during cold storage reflects the elevated plasma titer of HF.
Palavras-chave
Biology; Blood Coagulation Effects; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Methods--side effects; Ethinyl Estradiol; Ethynodiol Diacetate; Examinations And Diagnoses; Family Planning; Hematological Effects; Hemic System; Homeostasis; Laboratory Examinations And Diagnoses; Laboratory Procedures; Mestranol; Norethindrone; Norgestrel; Oral Contraceptives--side effects; Physiology; Renin-angiotensin-aldosterone Effects; Reproductive Control Agents
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fator XII
/
Renina
/
Temperatura Baixa
/
Anticoncepcionais Orais
/
Precursores Enzimáticos
Limite:
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Clin Invest
Ano de publicação:
1983
Tipo de documento:
Article