17-Hydroxyprogesterone blunts the hypertensive response associated with reductions in uterine perfusion pressure in pregnant rats.
Am J Obstet Gynecol
; 201(3): 324.e1-6, 2009 Sep.
Article
em En
| MEDLINE
| ID: mdl-19733289
ABSTRACT
OBJECTIVE:
Reduction in uteroplacental perfusion (RUPP) in pregnant rats is associated with hypertension, elevated cytokines, and activation of the endothelin (ET-1) system. Our objective was to determine whether the antiinflammatory properties of 17-alpha-hydroxyprogesterone caproate (17 OHP) reduce cytokine-stimulated vasoactive pathways that are associated with hypertension in response to placental ischemia. STUDYDESIGN:
Mean arterial pressure (MAP), tumor necrosis factor-alpha (TNF-alpha), interleukin (IL)-6, and renal ET-1 were measured in the following pregnant controls, pregnant controls plus 17 OHP (6.6 mg/kg), RUPP rats, and RUPP rats plus 17 OHP.RESULTS:
MAP increased 29 mm Hg in RUPP rats compared with pregnant controls (P < .001), whereas in RUPP plus 17 OHP rats, MAP increased only 19 mm Hg (P < .05). TNF-alpha and IL-6 increased 2- to 3-fold, respectively, in response to placental ischemia but was normalized in RUPP rats treated with 17 OHP. ET-1 increased 3-fold in RUPP rats but was markedly less in RUPP plus 17 OHP rats.CONCLUSION:
17 OHP blunts hypertension associated with RUPP, possibly via suppression of cytokine-stimulated ET-1 activation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Circulação Placentária
/
17-alfa-Hidroxiprogesterona
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
/
Pregnancy
Idioma:
En
Revista:
Am J Obstet Gynecol
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Estados Unidos