Abstract
Objective
The synthetic retinoid Fenretinide (FEN) inhibits adiposity in male mice fed a high-fat-diet (HFD) in association with alterations in retinoic acid (RA)-signaling. Young female mice are protected from obesity via estrogen-signaling. We therefore investigated whether FEN also influences adiposity in aged female mice differing in parity, and whether such effects are mediated by retinoid and estrogen-signaling.
Design and Methods
Aged nulliparous and parous female mice were maintained on HFD±FEN and adiposity was assessed. Quantitative-PCR was performed on white adipose tissue (WAT), liver and 3T3-L1 adipocytes treated with RA or FEN±estrogen.
Results
Parous females were more obese than nulliparous mice independent of age. FEN-HFD prevented the HFD-induced increase in adiposity and leptin levels independently of parity. FEN-HFD induced retinoid-responsive genes in WAT and liver. Parous females had reduced expression of hepatic estrogen-responsive genes but FEN-HFD up-regulated WAT Cyp19a1 and Esr2 in parous mice. Estrogen and RA acted synergistically to increase RA-receptor (RAR)-mediated gene expression in 3T3-L1 adipocytes. FEN increased Cyp19a1 and Esr2, similar to our findings in vivo.
Conclusions
The prevention of adiposity by FEN in response to HFD in female mice appears to involve increased retinoid-signaling in association with induction of local estrogen production and estrogen-signaling in WAT.
The synthetic retinoid Fenretinide (FEN) inhibits adiposity in male mice fed a high-fat-diet (HFD) in association with alterations in retinoic acid (RA)-signaling. Young female mice are protected from obesity via estrogen-signaling. We therefore investigated whether FEN also influences adiposity in aged female mice differing in parity, and whether such effects are mediated by retinoid and estrogen-signaling.
Design and Methods
Aged nulliparous and parous female mice were maintained on HFD±FEN and adiposity was assessed. Quantitative-PCR was performed on white adipose tissue (WAT), liver and 3T3-L1 adipocytes treated with RA or FEN±estrogen.
Results
Parous females were more obese than nulliparous mice independent of age. FEN-HFD prevented the HFD-induced increase in adiposity and leptin levels independently of parity. FEN-HFD induced retinoid-responsive genes in WAT and liver. Parous females had reduced expression of hepatic estrogen-responsive genes but FEN-HFD up-regulated WAT Cyp19a1 and Esr2 in parous mice. Estrogen and RA acted synergistically to increase RA-receptor (RAR)-mediated gene expression in 3T3-L1 adipocytes. FEN increased Cyp19a1 and Esr2, similar to our findings in vivo.
Conclusions
The prevention of adiposity by FEN in response to HFD in female mice appears to involve increased retinoid-signaling in association with induction of local estrogen production and estrogen-signaling in WAT.
Original language | English |
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Pages (from-to) | 1655-1662 |
Number of pages | 8 |
Journal | Obesity |
Volume | 23 |
Issue number | 8 |
Early online date | 14 Jul 2015 |
DOIs | |
Publication status | Published - Aug 2015 |
Bibliographical note
AcknowledgmentsThe authors thank J.R. Speakman (UoA) for invaluable discussion regarding energy expenditure, T. Martin (Johnson & Johnson, NJ) and U. Thurneer (Cilag AG, Switzerland) for fenretinide, to use completely without restriction or obligation, and undergraduate student K. Towle (UoA) for assisting in experiments.
Funded by
British Heart Foundation Intermediate Basic Research Fellowship. Grant Number: FS/09/026
Research Councils UK Fellowship
European Foundation for the Study of Diabetes (EFSD)/Lilly
Biotechnology and Biological Sciences Research Council (BBSRC) studentship
University of Aberdeen (UoA) Centre for Genome-Enabled Biology & Medicine (CGEBM) studentship
BBSRC. Grant Number: BB/G014272/1
Keywords
- Female Mice
- Aged
- Fenretinide
- Obesity
- Retinoid
- Estrogen
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Nimesh Mody
- School of Medicine, Medical Sciences & Nutrition, Cardiometabolic Disease
- School of Medicine, Medical Sciences & Nutrition, Aberdeen Cardiovascular and Diabetes Centre
- School of Medicine, Medical Sciences & Nutrition, Medical Sciences - Senior Lecturer
- School of Medicine, Medical Sciences & Nutrition, Institute of Medical Sciences
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