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Int. J. Mol. Sci. 2013, 14(11), 21474-21488; doi:10.3390/ijms141121474

Short-Chain Fatty Acids Inhibit Growth Hormone and Prolactin Gene Transcription via cAMP/PKA/CREB Signaling Pathway in Dairy Cow Anterior Pituitary Cells

1
College of Veterinary Medicine, Jilin University, Changchun 130062, China
2
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China
3
Laboratory of the Animal Center, Academy of Military Medical Sciences, Beijing 100850, China
These authors contributed equally to this work.
*
Authors to whom correspondence should be addressed.
Received: 6 August 2013 / Revised: 26 September 2013 / Accepted: 30 September 2013 / Published: 30 October 2013
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Abstract

Short-chain fatty acids (SCFAs) play a key role in altering carbohydrate and lipid metabolism, influence endocrine pancreas activity, and as a precursor of ruminant milk fat. However, the effect and detailed mechanisms by which SCFAs mediate bovine growth hormone (GH) and prolactin (PRL) gene transcription remain unclear. In this study, we detected the effects of SCFAs (acetate, propionate, and butyrate) on the activity of the cAMP/PKA/CREB signaling pathway, GH, PRL, and Pit-1 gene transcription in dairy cow anterior pituitary cells (DCAPCs). The results showed that SCFAs decreased intracellular cAMP levels and a subsequent reduction in PKA activity. Inhibition of PKA activity decreased CREB phosphorylation, thereby inhibiting GH and PRL gene transcription. Furthermore, PTX blocked SCFAs- inhibited cAMP/PKA/CREB signaling pathway. These data showed that the inhibition of GH and PRL gene transcription induced by SCFAs is mediated by Gi activation and that propionate is more potent than acetate and butyrate in inhibiting GH and PRL gene transcription. In conclusion, this study identifies a biochemical mechanism for the regulation of SCFAs on bovine GH and PRL gene transcription in DCAPCs, which may serve as one of the factors that regulate pituitary function in accordance with dietary intake. View Full-Text
Keywords: short-chain fatty acids; dairy cow; growth hormone; prolactin; G protein short-chain fatty acids; dairy cow; growth hormone; prolactin; G protein
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wang, J.-F.; Fu, S.-P.; Li, S.-N.; Hu, Z.-M.; Xue, W.-J.; Li, Z.-Q.; Huang, B.-X.; Lv, Q.-K.; Liu, J.-X.; Wang, W. Short-Chain Fatty Acids Inhibit Growth Hormone and Prolactin Gene Transcription via cAMP/PKA/CREB Signaling Pathway in Dairy Cow Anterior Pituitary Cells. Int. J. Mol. Sci. 2013, 14, 21474-21488.

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