Abstract
This study examined the actions of 17β-estradiol (E2) and progesterone on the regulation of the peroxisome proliferator-activated receptors (PPARα and PPARγ) family of nuclear transcription factors and the mRNA abundance of key enzymes involved in fat oxidation, in skeletal muscle. Specifically, carnitine palmitoyltransferase I (CPT I), β-3-hydroxyacyl CoA dehydrogenase (P-HAD), and pyruvate dehydrogenase kinase 4 (PDK4) were examined. Sprague-Dawley rats were ovariectomized and treated with placebo (Ovx), E2, progesterone, or both hormones in combination (E+P). Additionally, sham-operated rats were treated with placebo (Sham) to serve as controls. Hormone (or vehicle only) delivery was via time release pellets inserted at the time of surgery, 15 days prior to analysis. E2 treatment increased PPARα mRNA expression and protein content (P<0.05), compared with Ovx treatment. E2 also resulted in upregulated mRNA of CPT I and PDK4 (P<0.05), PPARγ mRNA expression was also increased (P<0.05) by E2 treatment, although protein content remained unaltered. These data demonstrate the novel regulation of E2 on PPARα and genes encoding key proteins that are pivotal in regulating skeletal muscle lipid oxidative flux.
| Original language | English |
|---|---|
| Pages (from-to) | 37-45 |
| Number of pages | 9 |
| Journal | Journal of Molecular Endocrinology |
| Volume | 31 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Aug 2003 |
| Externally published | Yes |
Cite this
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17β-Estradiol upregulates the expression of peroxisome proliferator-activated receptor α and lipid oxidative genes in skeletal muscle. / Campbell, S. E.; Mehan, K. A.; Tunstall, R. J.; Febbraio, M. A.; Cameron-Smith, David.
In: Journal of Molecular Endocrinology, Vol. 31, No. 1, 01.08.2003, p. 37-45.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - 17β-Estradiol upregulates the expression of peroxisome proliferator-activated receptor α and lipid oxidative genes in skeletal muscle
AU - Campbell, S. E.
AU - Mehan, K. A.
AU - Tunstall, R. J.
AU - Febbraio, M. A.
AU - Cameron-Smith, David
PY - 2003/8/1
Y1 - 2003/8/1
N2 - This study examined the actions of 17β-estradiol (E2) and progesterone on the regulation of the peroxisome proliferator-activated receptors (PPARα and PPARγ) family of nuclear transcription factors and the mRNA abundance of key enzymes involved in fat oxidation, in skeletal muscle. Specifically, carnitine palmitoyltransferase I (CPT I), β-3-hydroxyacyl CoA dehydrogenase (P-HAD), and pyruvate dehydrogenase kinase 4 (PDK4) were examined. Sprague-Dawley rats were ovariectomized and treated with placebo (Ovx), E2, progesterone, or both hormones in combination (E+P). Additionally, sham-operated rats were treated with placebo (Sham) to serve as controls. Hormone (or vehicle only) delivery was via time release pellets inserted at the time of surgery, 15 days prior to analysis. E2 treatment increased PPARα mRNA expression and protein content (P<0.05), compared with Ovx treatment. E2 also resulted in upregulated mRNA of CPT I and PDK4 (P<0.05), PPARγ mRNA expression was also increased (P<0.05) by E2 treatment, although protein content remained unaltered. These data demonstrate the novel regulation of E2 on PPARα and genes encoding key proteins that are pivotal in regulating skeletal muscle lipid oxidative flux.
AB - This study examined the actions of 17β-estradiol (E2) and progesterone on the regulation of the peroxisome proliferator-activated receptors (PPARα and PPARγ) family of nuclear transcription factors and the mRNA abundance of key enzymes involved in fat oxidation, in skeletal muscle. Specifically, carnitine palmitoyltransferase I (CPT I), β-3-hydroxyacyl CoA dehydrogenase (P-HAD), and pyruvate dehydrogenase kinase 4 (PDK4) were examined. Sprague-Dawley rats were ovariectomized and treated with placebo (Ovx), E2, progesterone, or both hormones in combination (E+P). Additionally, sham-operated rats were treated with placebo (Sham) to serve as controls. Hormone (or vehicle only) delivery was via time release pellets inserted at the time of surgery, 15 days prior to analysis. E2 treatment increased PPARα mRNA expression and protein content (P<0.05), compared with Ovx treatment. E2 also resulted in upregulated mRNA of CPT I and PDK4 (P<0.05), PPARγ mRNA expression was also increased (P<0.05) by E2 treatment, although protein content remained unaltered. These data demonstrate the novel regulation of E2 on PPARα and genes encoding key proteins that are pivotal in regulating skeletal muscle lipid oxidative flux.
UR - http://www.scopus.com/inward/record.url?scp=0041852780&partnerID=8YFLogxK
U2 - 10.1677/jme.0.0310037
DO - 10.1677/jme.0.0310037
M3 - Article
VL - 31
SP - 37
EP - 45
JO - Journal of Molecular Endocrinology
JF - Journal of Molecular Endocrinology
SN - 0952-5041
IS - 1
ER -