Evidence for microvascular dysfunction after prenatal dexamethasone at 0.7, 0.75, and 0.8 gestation in sheep.
Evidence for microvascular dysfunction after prenatal dexamethasone at 0.7, 0.75, and 0.8 gestation in sheep.
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绵羊妊娠 0.7、0.75 和 0.8 周产前使用地塞米松后微血管功能障碍的证据。
DOI:
10.1152/ajpregu.00031.2002
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
Nathanielsz,PeterW
中科院分区:
文献类型:
--
作者:
Molnar,Judit;Nijland,MarkJM;Howe,DavidC;Nathanielsz,PeterW
Dexamethasone (DM) was administered to pregnant ewes as three weekly courses of four injections of 2 mg at 12-h intervals. DM (n= 7) or saline (n= 7) was given starting at 103 days of gestation (dGA; term ∼149 days). Fetal femoral arteries (∼300-μm internal diameter) were evaluated using wire myography at 119 dGA. DM-exposed fetuses were significantly smaller than saline-exposed fetuses. DM exposure increased maximal contraction to 125 mM KCl, and maximum tension developed along with sensitivity to endothelin-1 and relaxation to bradykinin. Preincubation with the nitric oxide synthase inhibitorNG-nitro-l-arginine methyl ester shifted the dose-response curves to endothelin-1 and acetylcholine to the right in controls but not in the DM-exposed group. Relaxation to acetylcholine and to the nitric oxide donor sodium nitroprusside was similar in both groups. The combination of enhanced endothelin-induced vasoconstriction, abnormal endothelium-dependent relaxation, and normal endothelium-independent relaxation indicates microvessel dysfunction following antenatal DM administration. Because such dysfunction is associated with several forms of adult hypertension, our results indicate the potential for consequences of antenatal glucocorticoid exposure on adult cardiovascular health.
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DOI:
10.1152/ajpregu.2001.281.3.r960
发表时间:
2001-09-01
影响因子:
2.8
作者:
Moss, TJM;Sloboda, DM;Newnham, JP
通讯作者:
Newnham, JP
影响因子:
8.3
作者:
KATUSIC, ZS;SHEPHERD, JT;VANHOUTTE, PM
通讯作者:
VANHOUTTE, PM
影响因子:
--
作者:
S. Kanse;M. A. Benito;K. Takahashi;J. Warren;M. Ghatei;S. Bloom
通讯作者:
S. Bloom
影响因子:
4.6
作者:
S. Taddei;A. Virdis;L. Ghiadoni;I. Sudano;A. Magagna;A. Salvetti
通讯作者:
A. Salvetti
DOI:
10.1097/00004872-199112000-00080
发表时间:
1991
期刊:
Journal of hypertension. Supplement : official journal of the International Society of Hypertension
影响因子:
--
作者:
R. Schleiffer;F. Pernot;B. Van Overloop;A. Gairard
通讯作者:
A. Gairard