Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/78411
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Type: | Journal article |
Title: | A maternal 'junk-food' diet reduces sensitivity to the opioid antagonist naloxone in offspring postweaning |
Author: | Gugusheff, J. Ong, Z. Muhlhausler, B. |
Citation: | The FASEB Journal, 2013; 27(3):1275-1284 |
Publisher: | Federation of American Societies for Experimental Biology |
Issue Date: | 2013 |
ISSN: | 1530-6860 1530-6860 |
Statement of Responsibility: | Jessica R. Gugusheff, Zhi Yi Ong and Beverly S. Muhlhausler |
Abstract: | Perinatal exposure to a maternal “junk-food” diet has been demonstrated to increase the preference for palatable diets in adult offspring. We aimed to determine whether this increased preference could be attributed to changes in μ-opioid receptor expression within the mesolimbic reward pathway. We report here that mRNA expression of the μ-opioid receptor in the ventral tegmental area (VTA) at weaning was 1.4-fold (males) and 1.9-fold (females) lower in offspring of junk-food (JF)-fed rat dams than in offspring of dams fed a standard rodent diet (control) (P<0.05). Administration of the opioid antagonist naloxone to offspring given a palatable diet postweaning significantly reduced fat intake in control offspring (males: 7.7±0.7 vs. 5.4±0.6 g/kg/d; females: 6.9±0.3 vs. 3.9±0.5g/kg/d; P<0.05), but not in male JF offspring (8.6±0.6 vs. 7.1±0.5g/kg/d) and was less effective at reducing fat intake in JF females (42.2±6.0 vs. 23.1±4.1% reduction, P<0.05). Similar findings were observed for total energy intake. Naloxone treatment did not affect intake of standard rodent feed in control or JF offspring. These findings suggest that exposure to a maternal junk-food diet results in early desensitization of the opioid system which may explain the increased preference for junk food in these offspring.—Gugusheff, J. R., Ong, Z. Y., Muhlhausler, B. S. A maternal “junk-food” diet reduces sensitivity to the opioid antagonist naloxone in offspring postweaning. |
Keywords: | fetal programming high-fat diet reward |
Rights: | © FASEB |
DOI: | 10.1096/fj.12-217653 |
Published version: | http://dx.doi.org/10.1096/fj.12-217653 |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest |
Files in This Item:
File | Description | Size | Format | |
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hdl_78411.pdf | Accepted version | 552.86 kB | Adobe PDF | View/Open |
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