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The Journal of Neuroscience, April 5, 2006, 26(14):3840-3844; doi:10.1523/JNEUROSCI.4464-05.2006

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Development/Plasticity/Repair
The Mother or the Fetus? 11-Hydroxysteroid Dehydrogenase Type 2 Null Mice Provide Evidence for Direct Fetal Programming of Behavior by Endogenous Glucocorticoids

Megan C. Holmes,¹ Christian T. Abrahamsen,¹ Karen L. French,¹ Janice M. Paterson,² John J. Mullins,² and Jonathan R. Seckl¹

¹Endocrinology Unit and ²Molecular Physiology Laboratory, Centre for Cardiovascular Disease, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom

Correspondence should be addressed to Dr. Megan C. Holmes, Endocrinology Unit, Centre for Cardiovascular Disease, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, UK. Email: Megan.Holmes{at}ed.ac.uk

Low birth weight associates with increased susceptibility to adult cardiometabolic and affective disorders spawning the notion of fetal "programming." Prenatal exposure to excess glucocorticoids may be causal. In support, maternal stress or treatment during pregnancy with dexamethasone (which crosses the placenta) or inhibitors of fetoplacental 11-hydroxysteroid dehydrogenase type 2 (11-HSD2), the physiological "barrier" to maternal glucocorticoids, reduces birth weight and programs permanent offspring hypertension, hyperglycemia, and anxiety behaviors. It remains uncertain whether such effects are mediated indirectly via altered maternal function or directly on the fetus and its placenta. To dissect this critical issue, we mated 11-HSD2^+/– mice such that each pregnant female produces +/+, +/–, and –/– offspring and compared them with offspring of homozygous wild-type and –/– matings. We show that 11-HSD2^–/– offspring of either +/– or –/– mothers have lower birth weight and exhibit greater anxiety than 11-HSD2^+/+ littermates. This provides clear evidence for the key role of fetoplacental 11-HSD2 in prenatal glucocorticoid programming.

Key words: anxiety; hypothalamic–pituitary–adrenal axis; glucocorticoids; programming; behavior; 11-hydroxysteroid dehydrogenase

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Received Oct. 19, 2005; revised Feb. 22, 2006; accepted Feb. 24, 2006.

Correspondence should be addressed to Dr. Megan C. Holmes, Endocrinology Unit, Centre for Cardiovascular Disease, Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh EH16 4TJ, UK. Email: Megan.Holmes{at}ed.ac.uk

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				J. L. W. Yau, K. M. McNair, J. Noble, D. Brownstein, C. Hibberd, N. Morton, J. J. Mullins, R. G. M. Morris, S. Cobb, and J. R. Seckl Enhanced Hippocampal Long-Term Potentiation and Spatial Learning in Aged 11{beta}-Hydroxysteroid Dehydrogenase Type 1 Knock-Out Mice J. Neurosci., September 26, 2007; 27(39): 10487 - 10496. [Abstract] [Full Text] [PDF]

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