scholarly journals Time course analysis of peroxisome proliferator activated receptor (PPARα/Ppara) agonist-dependent transcriptomes in rat liver

2015 ◽  
Author(s):  
HK Hamadeh
Keyword(s):  
Rat Liver ◽  
Time Course ◽  
Peroxisome Proliferator ◽  
Peroxisome Proliferator Activated Receptor

scholarly journals Human Endometrial Stromal Cell Differentiation is Stimulated by PPARβ/δ Activation: New Targets for Infertility?

2020 ◽  
Vol 105 (9) ◽  
pp. 2983-2995 ◽  
Author(s):  
Jie Yu ◽  
Sarah L Berga ◽  
Wei Zou ◽  
Augustine Rajakumar ◽  
Mingfei Man ◽  
...  
Keyword(s):  
Cell Differentiation ◽  
Growth Factor ◽  
Connexin 43 ◽  
Time Course ◽  
Estrogen Receptor Α ◽  
Peroxisome Proliferator ◽  
Endometrial Stromal Cells ◽  
Peroxisome Proliferator Activated Receptor ◽  
Therapeutic Benefits

Abstract Context Implantation is a reproductive bottleneck in women, regulated by fluctuations in ovarian steroid hormone concentrations. However, other nuclear receptor ligands are modifiers of endometrial differentiation leading to successful pregnancy. In the present study we analyzed the effects of peroxisome-proliferator-activated receptor β/δ (PPARβ/δ) activation on established cellular biomarkers of human endometrial differentiation (decidualization). Objective The objective of this work is to test the effects of PPARβ/δ ligation on human endometrial cell differentiation. Design Isolated primary human endometrial stromal cells (ESCs) were treated with synthetic (GW0742) or natural (all trans-retinoic acid, RA) ligands of PPARβ/δ, and also with receptor antagonists (GSK0660, PT-S58, and ST247) in the absence or presence of decidualizing hormones (10 nM estradiol, 100 nM progesterone, and 0.5 mM dibutyryl cAMP [3′,5′-cyclic adenosine 5′-monophosphate]). In some cases interleukin (IL)-1β was used as an inflammatory stimulus. Time course and dose-response relationships were evaluated to determine effects on panels of well characterized in vitro biomarkers of decidualization. Results PPARβ/δ, along with estrogen receptor α (ERα) and PR-A and PR-B, were expressed in human endometrial tissue and isolated ESCs. GW0742 treatment enhanced hormone-mediated ESC decidualization in vitro as manifested by upregulation of prolactin, insulin-like growth factor-binding protein 1, IL-11, and vascular endothelial growth factor (VEGF) secretion and also increased expression of ERα, PR-A and PR-B, and connexin 43 (Cx43). RA treatment also increased VEGF, ERα, PR-A, and PR-B and an active, nonphosphorylated isoform of Cx43. IL-1β and PPARβ/δ antagonists inhibited biomarkers of endometrial differentiation. Conclusion Ligands that activate PPARβ/δ augment the in vitro expression of biomarkers of ESC decidualization. By contrast, PPARβ/δ antagonists impaired decidualization markers. Drugs activating these receptors may have therapeutic benefits for embryonic implantation.

scholarly journals Peroxisome Proliferator-Activated Receptor γ Target Gene Encoding a Novel Angiopoietin-Related Protein Associated with Adipose Differentiation

2000 ◽  
Vol 20 (14) ◽  
pp. 5343-5349 ◽  
Author(s):  
J. Cliff Yoon ◽  
Troy W. Chickering ◽  
Evan D. Rosen ◽  
Barry Dussault ◽  
Yubin Qin ◽  
...  
Keyword(s):  
Transcriptional Activation ◽  
Time Course ◽  
Target Gene ◽  
Target Genes ◽  
Peroxisome Proliferator ◽  
Peroxisome Proliferator Activated Receptor ◽  
Isolation And Characterization ◽  
Adipose Differentiation ◽  
Novel Target

ABSTRACT The nuclear receptor peroxisome proliferator-activated receptor γ regulates adipose differentiation and systemic insulin signaling via ligand-dependent transcriptional activation of target genes. However, the identities of the biologically relevant target genes are largely unknown. Here we describe the isolation and characterization of a novel target gene induced by PPARγ ligands, termed PGAR (for PPARγ angiopoietin related), which encodes a novel member of the angiopoietin family of secreted proteins. The transcriptional induction of PGAR follows a rapid time course typical of immediate-early genes and occurs in the absence of protein synthesis. The expression of PGAR is predominantly localized to adipose tissues and placenta and is consistently elevated in genetic models of obesity. Hormone-dependent adipocyte differentiation coincides with a dramatic early induction of the PGAR transcript. Alterations in nutrition and leptin administration are found to modulate the PGAR expression in vivo. Taken together, these data suggest a possible role for PGAR in the regulation of systemic lipid metabolism or glucose homeostasis.

scholarly journals Leptin Rapidly Induces the Expression of Metabolic and Myokine Genes in C2C12 Muscle Cells to Regulate Nutrient Partition and Oxidation

2015 ◽  
Vol 35 (1) ◽  
pp. 92-103 ◽  
Author(s):  
Yuriy Nozhenko ◽  
Ana M. Rodríguez ◽  
Andreu Palou
Keyword(s):  
Time Course ◽  
Leptin Receptor ◽  
Uncoupling Protein ◽  
Muscle Cells ◽  
Pyruvate Dehydrogenase Kinase ◽  
C2c12 Myotubes ◽  
Peroxisome Proliferator ◽  
Mrna Levels ◽  
Peroxisome Proliferator Activated Receptor ◽  
Protein Levels

Background: Skeletal muscle can experience pronounced metabolic adaptations in response to extrinsic stimuli, and expresses leptin receptor (OB-Rb). We aimed to further the understanding of leptin effects on muscle cells, by studying the expression of key energy metabolism genes in C2C12 myotubes. Methods: We performed a dose-time-dependent study with physiological concentrations of leptin: 5, 10 and 50ng/ml, for 0, 30', 3h, 6h, 12h and 24h, also monitoring time-course changes in non-treated cells. mRNA levels were analyzed by RT-qPCR and peroxisome proliferator activated receptor γ coactivator 1α (PGC1α) protein levels by western blot. Results: The most significant effects were observed with 50ng/ml leptin. In the short-term (30' and/or 3h), leptin significantly induced the expression of PGC1α, muscle carnitine palmitoyl transferase 1 (mCPT1), uncoupling protein 3 (UCP3), OB-Rb, Insulin receptor (InsR) and interleukins 6 and 15 (IL6, IL15). There was a decrease in mRNA levels of pyruvate dehydrogenase kinase 4 (PDK4) and mCPT1 in the long-term (24h). PGC1α protein levels were increased (24h). Conclusion: Leptin rapidly induces the expression of genes important for its own response and the control of metabolic fuels, with the rapid responses of the genes encoding the master regulator PGC1α, mCPT1, UCP3, PDK4 and the signaling secretory molecule IL6 particularly interesting.

Regulation of Peroxisome Proliferator-Activated Receptor-α mRNA in Rat Liver

1996 ◽  
Vol 326 (2) ◽  
pp. 281-289 ◽  
Author(s):  
Paul F. Sterchele ◽  
Hong Sun ◽  
Richard E. Peterson ◽  
John P. Vanden Heuvel
Keyword(s):  
Rat Liver ◽  
Peroxisome Proliferator ◽  
Peroxisome Proliferator Activated Receptor
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