Publikationsdatum:
2010-03-20
Beschreibung:
The onset of puberty defines a developmental stage when some learning processes are diminished, but the mechanism for this deficit remains unknown. We found that, at puberty, expression of inhibitory alpha4betadelta gamma-aminobutyric acid type A (GABAA) receptors (GABAR) increases perisynaptic to excitatory synapses in CA1 hippocampus. Shunting inhibition via these receptors reduced N-methyl-D-aspartate receptor activation, impairing induction of long-term potentiation (LTP). Pubertal mice also failed to learn a hippocampal, LTP-dependent spatial task that was easily acquired by delta-/- mice. However, the stress steroid THP (3alphaOH-5alpha[beta]-pregnan-20-one), which reduces tonic inhibition at puberty, facilitated learning. Thus, the emergence of alpha4betadelta GABARs at puberty impairs learning, an effect that can be reversed by a stress steroid.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2887350/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2887350/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shen, Hui -- Sabaliauskas, Nicole -- Sherpa, Ang -- Fenton, Andre A -- Stelzer, Armin -- Aoki, Chiye -- Smith, Sheryl S -- AA12958/AA/NIAAA NIH HHS/ -- DA09618/DA/NIDA NIH HHS/ -- R01 AA012958/AA/NIAAA NIH HHS/ -- R01 AA012958-08/AA/NIAAA NIH HHS/ -- R01 AA012958-09/AA/NIAAA NIH HHS/ -- R01 DA009618/DA/NIDA NIH HHS/ -- R01 DA009618-13/DA/NIDA NIH HHS/ -- R01 DA009618-14/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 2010 Mar 19;327(5972):1515-8. doi: 10.1126/science.1184245.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology and Pharmacology, State University of New York (SUNY) Downstate Medical Center, 450 Clarkson Avenue, Brooklyn, NY 11203, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20299596" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Animals
;
CA1 Region, Hippocampal/cytology/*metabolism
;
Dendrites
;
Dendritic Spines/metabolism
;
Excitatory Postsynaptic Potentials
;
Female
;
GABA-A Receptor Antagonists
;
*Learning/drug effects
;
*Long-Term Potentiation
;
Mice
;
Mice, Inbred C57BL
;
N-Methylaspartate/metabolism
;
Neural Inhibition
;
Patch-Clamp Techniques
;
Pregnanolone/pharmacology
;
Pyramidal Cells/metabolism
;
Receptors, GABA-A/*metabolism
;
Receptors, N-Methyl-D-Aspartate/metabolism
;
*Sexual Maturation
;
Spatial Behavior
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
