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15-Deoxy-Δ 12,14 -prostaglandin J 2 and peroxisome proliferator-activated receptor γ (PPARγ) levels in term placental tissues from control and diabetic rats: modulatory effects of a PPARγ agonist on nitridergic and lipid placental metabolism

15-Deoxy-Δ 12,14 -prostaglandin J 2 and peroxisome proliferator-activated receptor γ (PPARγ)... 15-Deoxy-Δ 12,14 -prostaglandin J 2 (15dPGJ 2 ) is a peroxisome proliferator-activated receptor γ (PPARγ) ligand that regulates lipid homeostasis and has anti-inflammatory properties in many cell types. We postulated that 15dPGJ 2 may regulate lipid homeostasis and nitric oxide (NO) levels in term placental tissues and that alterations in these pathways may be involved in diabetes-induced placental derangements. In the present study, we observed that, in term placental tissues from streptozotocin-induced diabetic rats, 15dPGJ 2 concentrations were decreased (83%) and immunostaining for nitrotyrosine, indicating peroxynitrite-induced damage, was increased. In the presence of 15dPGJ 2 , concentrations of nitrates/nitrites (an index of NO production) were diminished (40%) in both control and diabetic rats, an effect that seems to be both dependent on and independent of PPARγ activation. Exogenous 15dPGJ 2 did not modify lipid mass, but decreased the incorporation of 14 C-acetate into triacylglycerol (35%), cholesteryl ester (55%) and phospholipid (32%) in placenta from control rats, an effect that appears to be dependent on PPARγ activation. In contrast, the addition of 15dPGJ 2 did not alter de novo lipid synthesis in diabetic rat placenta, which showed decreased levels of PPARγ. We conclude that 15dPGJ 2 modulates placental lipid metabolism and NO production. The concentration and function of 15dPGJ 2 and concentrations of PPARγ were altered in placentas from diabetic rats, anomalies probably involved in diabetes-induced placental dysfunction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Reproduction Fertility and Development CSIRO Publishing

15-Deoxy-Δ 12,14 -prostaglandin J 2 and peroxisome proliferator-activated receptor γ (PPARγ) levels in term placental tissues from control and diabetic rats: modulatory effects of a PPARγ agonist on nitridergic and lipid placental metabolism

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References (55)

Publisher
CSIRO Publishing
Copyright
CSIRO
ISSN
1031-3613
eISSN
1448-5990
DOI
10.1071/RD04067
Publisher site
See Article on Publisher Site

Abstract

15-Deoxy-Δ 12,14 -prostaglandin J 2 (15dPGJ 2 ) is a peroxisome proliferator-activated receptor γ (PPARγ) ligand that regulates lipid homeostasis and has anti-inflammatory properties in many cell types. We postulated that 15dPGJ 2 may regulate lipid homeostasis and nitric oxide (NO) levels in term placental tissues and that alterations in these pathways may be involved in diabetes-induced placental derangements. In the present study, we observed that, in term placental tissues from streptozotocin-induced diabetic rats, 15dPGJ 2 concentrations were decreased (83%) and immunostaining for nitrotyrosine, indicating peroxynitrite-induced damage, was increased. In the presence of 15dPGJ 2 , concentrations of nitrates/nitrites (an index of NO production) were diminished (40%) in both control and diabetic rats, an effect that seems to be both dependent on and independent of PPARγ activation. Exogenous 15dPGJ 2 did not modify lipid mass, but decreased the incorporation of 14 C-acetate into triacylglycerol (35%), cholesteryl ester (55%) and phospholipid (32%) in placenta from control rats, an effect that appears to be dependent on PPARγ activation. In contrast, the addition of 15dPGJ 2 did not alter de novo lipid synthesis in diabetic rat placenta, which showed decreased levels of PPARγ. We conclude that 15dPGJ 2 modulates placental lipid metabolism and NO production. The concentration and function of 15dPGJ 2 and concentrations of PPARγ were altered in placentas from diabetic rats, anomalies probably involved in diabetes-induced placental dysfunction.

Journal

Reproduction Fertility and DevelopmentCSIRO Publishing

Published: Mar 15, 2005

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