QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

HOME  |   SEARCH  |   ARCHIVE  |   SUBSCRIBE  |   CONTACT  |   HELP

The Journal of Neuroscience, May 26, 2004, 24(21):5000-5008; doi:10.1523/JNEUROSCI.0143-04.2004

This Article Full Text Full Text (PDF) Submit an eLetter Alert me when this article is cited Alert me when eLetters are posted Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (25) Citing Articles via Google Scholar Google Scholar Articles by Tan, H. Articles by Yan, Z. Search for Related Content PubMed PubMed Citation Articles by Tan, H. Articles by Yan, Z.

 Previous Article  |  Next Article 

Cellular/Molecular
Corticotropin-Releasing Factor and Acute Stress Prolongs Serotonergic Regulation of GABA Transmission in Prefrontal Cortical Pyramidal Neurons

Huibing Tan, Ping Zhong, and Zhen Yan

Department of Physiology and Biophysics, State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, New York 14214

The stress-related neuropeptide corticotropin-releasing factor (CRF) and the serotonin system are both critically involved in the pathophysiology of mental disorders, including anxiety and depression. To understand the potential link between them, we investigated the impact of CRF on 5-HT functions in pyramidal neurons of the prefrontal cortex (PFC), a brain region that is crucial for the control of emotion and cognition. One prominent function of serotonin in PFC is to regulate GABAergic inhibitory transmission, as indicated by a 5-HT-induced large, desensitizing (4 min) enhancement of the amplitude and frequency of spontaneous IPSCs (sIPSCs). In PFC slices exposed to CRF treatment, the regulation of sIPSCs by 5-HT was significantly prolonged (8-10 min), and this effect of CRF was blocked by treatment with the competitive CRF receptor antagonist -helical CRF_9-41 and with the CRF-R1-specific antagonist astressin. Inhibiting phospholipase C or protein kinase C (PKC) abolished the prolongation by CRF of the effects of 5-HT on sIPSCs. In PFC slices prepared from animals previously exposed to acute stress (forced swim or elevated platform), the regulation of sIPSCs by 5-HT was significantly prolonged, mimicking the effect of CRF treatment. The stress-induced prolongation of the effects of 5-HT on sIPSCs was diminished by -helical CRF_9-41 treatment, mimicked by direct activation of PKC, and reversed by short-term treatment with drugs that have anxiolytic efficacy. These results show that in response to stressful stimuli, CRF alters the serotonergic regulation of GABA transmission through a mechanism that is dependent on PKC. The interaction between CRF and 5-HT may play an important role in psychiatric disorders, in which both are highly implicated.

Key words: prefrontal cortex; corticotropin-releasing factor; stress; IPSC; serotonin; PKC

---

Received Jan 14, 2004; revised April 15, 2004; accepted April 19, 2004.

This article has been cited by other articles:

				J. G. McEuen, K. A. Semsar, M. A. Lim, and T. L. Bale Influence of Sex and Corticotropin-Releasing Factor Pathways as Determinants in Serotonin Sensitivity Endocrinology, August 1, 2009; 150(8): 3709 - 3716. [Abstract] [Full Text] [PDF]

				L. G. Kirby, E. Freeman-Daniels, J. C. Lemos, J. D. Nunan, C. Lamy, A. Akanwa, and S. G. Beck Corticotropin-Releasing Factor Increases GABA Synaptic Activity and Induces Inward Current in 5-Hydroxytryptamine Dorsal Raphe Neurons J. Neurosci., November 26, 2008; 28(48): 12927 - 12937. [Abstract] [Full Text] [PDF]

				P. Zhong, W. Liu, Z. Gu, and Z. Yan Serotonin facilitates long-term depression induction in prefrontal cortex via p38 MAPK/Rab5-mediated enhancement of AMPA receptor internalization J. Physiol., September 15, 2008; 586(18): 4465 - 4479. [Abstract] [Full Text] [PDF]

				B. R. Mueller and T. L. Bale Sex-Specific Programming of Offspring Emotionality after Stress Early in Pregnancy J. Neurosci., September 3, 2008; 28(36): 9055 - 9065. [Abstract] [Full Text] [PDF]

				J. G. McEuen, S. G. Beck, and T. L. Bale Failure to Mount Adaptive Responses to Stress Results in Dysregulation and Cell Death in the Midbrain Raphe J. Neurosci., August 13, 2008; 28(33): 8169 - 8177. [Abstract] [Full Text] [PDF]

				M. J. Wanat, F. W. Hopf, G. D. Stuber, P. E. M. Phillips, and A. Bonci Corticotropin-releasing factor increases mouse ventral tegmental area dopamine neuron firing through a protein kinase C-dependent enhancement of Ih J. Physiol., April 15, 2008; 586(8): 2157 - 2170. [Abstract] [Full Text] [PDF]

				S. M. Brown, S. Henning, and C. L. Wellman Mild, Short-term Stress Alters Dendritic Morphology in Rat Medial Prefrontal Cortex Cereb Cortex, November 1, 2005; 15(11): 1714 - 1722. [Abstract] [Full Text] [PDF]

Home  |   Search  |   Archive  |   Subscribe  |   Contact  |   Help