دورية أكاديمية
Morphological and electrophysiological properties of pyramidal-like neurons in the stratum oriens of Cornu ammonis 1 and Cornu ammonis 2 area of Proechimys.
| العنوان: | Morphological and electrophysiological properties of pyramidal-like neurons in the stratum oriens of Cornu ammonis 1 and Cornu ammonis 2 area of Proechimys. |
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| المؤلفون: | Scorza CA; Disciplina de Neurologia Experimental, Universidade Federal de São Paulo/Escola Paulista de Medicina, Rua Botucatu 862, 04023-900 São Paulo, Brazil., Araujo BH, Leite LA, Torres LB, Otalora LF, Oliveira MS, Garrido-Sanabria ER, Cavalheiro EA |
| المصدر: | Neuroscience [Neuroscience] 2011 Mar 17; Vol. 177, pp. 252-68. Date of Electronic Publication: 2011 Jan 06. |
| نوع المنشور: | Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Science Country of Publication: United States NLM ID: 7605074 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-7544 (Electronic) Linking ISSN: 03064522 NLM ISO Abbreviation: Neuroscience Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: [New York?] : Elsevier Science Original Publication: Oxford, Elmsford, N. Y., Pergamon Press |
| مواضيع طبية MeSH: | CA1 Region, Hippocampal/*cytology , CA1 Region, Hippocampal/*physiology , CA2 Region, Hippocampal/*cytology , CA2 Region, Hippocampal/*physiology , Pyramidal Cells/*physiology , Rodentia/*physiology, Action Potentials/physiology ; Animals ; Electrophysiology/methods ; Male ; Neural Pathways/physiology ; Neural Pathways/ultrastructure ; Organ Culture Techniques ; Pyramidal Cells/cytology ; Rats ; Rats, Wistar ; Species Specificity ; Synapses/physiology ; Synapses/ultrastructure |
| مستخلص: | Proechimys (Rodentia: Echimyidae) is a neotropical rodent of the Amazon region that has been successfully colonized in the laboratory and used for experimental medicine. Preliminary studies indicated that Proechimys (casiragua) rodents express an atypical resistance to developing a chronic epileptic condition in common models of temporal lobe epilepsy. Moreover, previous investigation of our laboratory described a remarkably different Proechimy's cytoarchitecture organization of the hippocampal CA2 subfield. In the present study, we investigated the intrinsic neuronal properties and morphological characteristics of the Proechimys's hippocampal pyramidal neurons of the CA1 and CA2 areas. A comparative approach was performed using neurons recorded in Wistar rats. A striking finding in Proechimys rodents was the presence of large pyramidal-like neurons throughout the stratum oriens from CA2 to CA1 area. In order to confirm such distinctive feature of the Proechimys's hippocampus, we performed Nissl staining and immunohistochemistry for neurofilament protein SM311. CA2 pyramidal neurons in the stratum pyramidale of Proechimys exhibited a significantly higher input resistance and lower time constant when compared to corresponding cell groups in the same area of the Wistar rat's. This newly identified population of pyramidal-shaped neurons in stratum oriens of Proechimys exhibited distinct electrophysiological and morphological properties. This included larger capacitance, lower input resistance, larger rheobase, long latency to first action potential and slower firing frequency. In addition, the apical dendrites of these neurons were oriented in parallel to apical dendrites of regular pyramidal neurons in stratum pyramidale. Moreover, these neurons were immunoreactive to SM311 as the majority of the neurons of the pyramidal layer. The functional role of these hippocampal neurons of the rodent Proechimys deserves further investigation. (Copyright © 2011 IBRO. All rights reserved.) |
| معلومات مُعتمدة: | 3SC1NS063950-03S1 United States NS NINDS NIH HHS; 5SC1NS063950-04 United States NS NINDS NIH HHS; P20MD001091 United States MD NIMHD NIH HHS |
| تواريخ الأحداث: | Date Created: 20110111 Date Completed: 20120119 Latest Revision: 20221104 |
| رمز التحديث: | 20221213 |
| DOI: | 10.1016/j.neuroscience.2010.12.054 |
| PMID: | 21215795 |
| قاعدة البيانات: | MEDLINE |
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Full Text Finder | تدمد: | 1873-7544 |
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| DOI: | 10.1016/j.neuroscience.2010.12.054 |