Journal article
Chronic behavioral stress induces apical dendritic reorganization in pyramidal neurons of the medial prefrontal cortex
Neuroscience, Vol.125(1), pp.1-6
2004
DOI: 10.1016/j.neuroscience.2004.01.006
PMID: 15051139
Abstract
Both the hippocampus and the medial prefrontal cortex (mPFC) play an important role in the negative feedback regulation of hypothalamic–pituitary–adrenal (HPA) activity during physiologic and behavioral stress. Moreover, chronic behavioral stress is known to affect the morphology of CA3c pyramidal neurons in the rat, by reducing total branch number and length of apical dendrites. In the present study, we investigated the effects of behavioral stress on the mPFC, using the repeated restraint stress paradigm. Animals were perfused after 21 days of daily restraint, and intracellular iontophoretic injections of Lucifer Yellow were carried out in pyramidal neurons of layer II/III of the anterior cingulate cortex and prelimbic area. Cellular reconstructions were performed on apical and basal dendrites of pyramidal neurons in layer II/III of the anterior cingulate and prelimbic cortices. We observed a significant reduction on the total length (20%) and branch numbers (17%) of apical dendrites, and no significant reduction in basal dendrites. These cellular changes may impair the capacity of the mPFC to suppress the response of the HPA axis to stress, and offer an experimental model of stress-induced neocortical reorganization that may provide a structural basis for the cognitive impairments observed in post-traumatic stress disorder.
Details
- Title: Subtitle
- Chronic behavioral stress induces apical dendritic reorganization in pyramidal neurons of the medial prefrontal cortex
- Creators
- J.J Radley - Kastor Neurobiology of Aging Laboratories and Fishberg Research Center for Neurobiology, Box 1639, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USAH.M Sisti - Laboratory of Neuroendocrinology, Rockefeller University, New York, NY 10021, USAJ Hao - Kastor Neurobiology of Aging Laboratories and Fishberg Research Center for Neurobiology, Box 1639, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USAA.B Rocher - Kastor Neurobiology of Aging Laboratories and Fishberg Research Center for Neurobiology, Box 1639, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USAT McCall - Laboratory of Neuroendocrinology, Rockefeller University, New York, NY 10021, USAP.R Hof - Kastor Neurobiology of Aging Laboratories and Fishberg Research Center for Neurobiology, Box 1639, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USAB.S McEwen - Laboratory of Neuroendocrinology, Rockefeller University, New York, NY 10021, USAJ.H Morrison - Kastor Neurobiology of Aging Laboratories and Fishberg Research Center for Neurobiology, Box 1639, Mount Sinai School of Medicine, One Gustave L. Levy Place, New York, NY 10029, USA
- Resource Type
- Journal article
- Publication Details
- Neuroscience, Vol.125(1), pp.1-6
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.neuroscience.2004.01.006
- PMID
- 15051139
- ISSN
- 0306-4522
- eISSN
- 1873-7544
- Language
- English
- Date published
- 2004
- Academic Unit
- Psychological and Brain Sciences; Iowa Neuroscience Institute
- Record Identifier
- 9984070552802771
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