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January 24, 2010 | History

Effects of repeated prenatal betamethasone (beta) exposure on hippocampal long-term potentiation (LTP) in juvenile guinea pigs 1 edition

Effects of repeated prenatal betamethasone (beta) exposure on hippocam ...
Elaine Setiawan

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Effects of repeated prenatal betamethasone (beta) exposure on hippocampal long-term potentiation (LTP) in juvenile guinea pigs.

Published 2005 .
Written in English.

About the Book

Synthetic GCs (sGCs) are used to treat women at risk of preterm labour. Currently, nothing is known about how prenatal sGCs affect synaptic function. The current study hypothesizes that there will be postnatal effects of prenatal exposure to sGCs on hippocampal synaptic plasticity. Pregnant guinea pigs were injected with Betamethasone (1mg/kg) or Saline on gestational days 40/41, 50/51 and 60/61. On post-natal day 21 (+/-2) long-term potentiation (LTP) was examined using slice recordings. Subsequently, the glucocorticoid (GR-) and mineralocorticoid receptor (MR)-dependent effects of cortisol were examined by applying concentrations of 0.1muM, 1.0muM or 10muM to the slice 30mins before LTP induction. Results show Beta females do not exhibit inhibition of LTP exhibited by all other groups in 10muM cortisol. Changes in the GR:MR ratio appear to underlie this difference. This study reveals sex specific effects of prenatal glucocorticoid exposure on LTP in the presence of elevated cortisol.

Edition Notes

Source: Masters Abstracts International, Volume: 44-02, page: 0771.

Thesis (M.Sc.)--University of Toronto, 2005.

Electronic version licensed for access by U. of T. users.

GERSTEIN MICROTEXT copy on microfiche (2 microfiches).

The Physical Object

113 leaves.
Number of pages

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History Created December 11, 2009 · 2 revisions Download catalog record: RDF / JSON

January 24, 2010 Edited by WorkBot add more information to works
December 11, 2009 Created by WorkBot add works page