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Impact of endothelin A receptor antagonist selectivity in chronic nitric oxide synthase inhibition-induced fetal growth restriction in the rat.
Hypertens Pregnancy. 2010; 29(3):284-93.HP

Abstract

OBJECTIVE

Endothelin receptor A (ETA) antagonism improves fetal and placental growth and placental perfusion on days 1 and 4, but not day 7 of a 7-day infusion of a nitric oxide synthase (NOS) inhibitor. Our purpose was to evaluate the significance of the degree of ETA antagonist selectivity on uteroplacental perfusion and fetal growth on day 7 of chronic NOS inhibition.

METHODS

Timed-pregnant rats were treated with the NOS inhibitor nitro-L-arginine methyl ester (L-NAME, 2.5 mg/kg/h) with and without one of the following ETA antagonists or their respective vehicles for 7 days beginning on day 14 of gestation: A-127722 (2,000-fold selective for ETA over ETB), FR139317 (8,000-fold ETA-selective), or ABT-546 (28,000-fold ETA-selective). Uterine and placental perfusion, as well as fetal and placental weight, was evaluated at the 7th day of treatment (gestation day 21).

RESULTS

L-NAME administration resulted in a significant reduction in uterine and placental perfusion as well as fetal and placental growth. In the setting of NOS inhibition, ETA antagonism did not improve uterine or placental perfusion or fetal growth after 7 days of infusion irrespective of the degree of selectivity of the antagonist used.

CONCLUSIONS

ETA antagonism, irrespective of the degree of receptor selectivity, does not improve fetal growth or uteroplacental perfusion on day 7 of chronic NOS inhibition.

Authors+Show Affiliations

Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, North Shore University Health System, Evanston, Illinois 60201, USA. mneerhof@ enh.orgNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

20504166

Citation

Neerhof, Mark G., et al. "Impact of Endothelin a Receptor Antagonist Selectivity in Chronic Nitric Oxide Synthase Inhibition-induced Fetal Growth Restriction in the Rat." Hypertension in Pregnancy, vol. 29, no. 3, 2010, pp. 284-93.
Neerhof MG, Synowiec S, Khan S, et al. Impact of endothelin A receptor antagonist selectivity in chronic nitric oxide synthase inhibition-induced fetal growth restriction in the rat. Hypertens Pregnancy. 2010;29(3):284-93.
Neerhof, M. G., Synowiec, S., Khan, S., & Thaete, L. G. (2010). Impact of endothelin A receptor antagonist selectivity in chronic nitric oxide synthase inhibition-induced fetal growth restriction in the rat. Hypertension in Pregnancy, 29(3), 284-93. https://doi.org/10.3109/10641950902777739
Neerhof MG, et al. Impact of Endothelin a Receptor Antagonist Selectivity in Chronic Nitric Oxide Synthase Inhibition-induced Fetal Growth Restriction in the Rat. Hypertens Pregnancy. 2010;29(3):284-93. PubMed PMID: 20504166.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Impact of endothelin A receptor antagonist selectivity in chronic nitric oxide synthase inhibition-induced fetal growth restriction in the rat. AU - Neerhof,Mark G, AU - Synowiec,Sylvia, AU - Khan,Saira, AU - Thaete,Larry G, PY - 2010/5/28/entrez PY - 2010/5/28/pubmed PY - 2010/11/5/medline SP - 284 EP - 93 JF - Hypertension in pregnancy JO - Hypertens Pregnancy VL - 29 IS - 3 N2 - OBJECTIVE: Endothelin receptor A (ETA) antagonism improves fetal and placental growth and placental perfusion on days 1 and 4, but not day 7 of a 7-day infusion of a nitric oxide synthase (NOS) inhibitor. Our purpose was to evaluate the significance of the degree of ETA antagonist selectivity on uteroplacental perfusion and fetal growth on day 7 of chronic NOS inhibition. METHODS: Timed-pregnant rats were treated with the NOS inhibitor nitro-L-arginine methyl ester (L-NAME, 2.5 mg/kg/h) with and without one of the following ETA antagonists or their respective vehicles for 7 days beginning on day 14 of gestation: A-127722 (2,000-fold selective for ETA over ETB), FR139317 (8,000-fold ETA-selective), or ABT-546 (28,000-fold ETA-selective). Uterine and placental perfusion, as well as fetal and placental weight, was evaluated at the 7th day of treatment (gestation day 21). RESULTS: L-NAME administration resulted in a significant reduction in uterine and placental perfusion as well as fetal and placental growth. In the setting of NOS inhibition, ETA antagonism did not improve uterine or placental perfusion or fetal growth after 7 days of infusion irrespective of the degree of selectivity of the antagonist used. CONCLUSIONS: ETA antagonism, irrespective of the degree of receptor selectivity, does not improve fetal growth or uteroplacental perfusion on day 7 of chronic NOS inhibition. SN - 1525-6065 UR - https://www.unboundmedicine.com/medline/citation/20504166/Impact_of_endothelin_A_receptor_antagonist_selectivity_in_chronic_nitric_oxide_synthase_inhibition_induced_fetal_growth_restriction_in_the_rat_ L2 - https://www.tandfonline.com/doi/full/10.3109/10641950902777739 DB - PRIME DP - Unbound Medicine ER -