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Coslovich T, Brumley MR, D'Angelo G, Della Mora A, Swann HE, Ortolani F, Taccola G. Histamine modulates spinal motoneurons and locomotor circuits. J Neurosci Res 2017; 96:889-900. [PMID: 29114923 DOI: 10.1002/jnr.24195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 10/01/2017] [Accepted: 10/16/2017] [Indexed: 12/20/2022]
Abstract
Spinal motoneurons and locomotor networks are regulated by monoamines, among which, the contribution of histamine has yet to be fully addressed. The present study investigates histaminergic regulation of spinal activity, combining intra- and extracellular electrophysiological recordings from neonatal rat spinal cord in vitro preparations. Histamine dose-dependently and reversibly generated motoneuron depolarization and action potential firing. Histamine (20 µM) halved the area of dorsal root reflexes and always depolarized motoneurons. The majority of cells showed a transitory repolarization, while 37% showed a sustained depolarization maintained with intense firing. Extracellularly, histamine depolarized ventral roots (VRs), regardless of blockage of ionotropic glutamate receptors. Initial, transient glutamate-mediated bursting was synchronous among VRs, with some bouts of locomotor activity in a subgroup of preparations. After washout, the amplitude of spontaneous tonic discharges increased. No desensitization or tachyphylaxis appeared after long perfusion or serial applications of histamine. On the other hand, histamine induced single motoneuron and VR depolarization, even in the presence of tetrodotoxin (TTX). During chemically induced fictive locomotion (FL), histamine depolarized VRs. Histamine dose-dependently increased rhythm periodicity and reduced cycle amplitude until near suppression. This study demonstrates that histamine induces direct motoneuron membrane depolarization and modulation of locomotor output, indicating new potential targets for locomotor neurorehabilitation.
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Affiliation(s)
- Tamara Coslovich
- Neuroscience Department, International School for Advanced Studies (SISSA), via Bonomea 265 Trieste, (TS), Italy.,SPINAL (Spinal Person Injury Neurorehabilitation Applied Laboratory), Istituto di Medicina Fisica e Riabilitazione (IMFR), via Gervasutta 48 Udine (UD), Italy
| | | | - Giuseppe D'Angelo
- Neuroscience Department, International School for Advanced Studies (SISSA), via Bonomea 265 Trieste, (TS), Italy.,SPINAL (Spinal Person Injury Neurorehabilitation Applied Laboratory), Istituto di Medicina Fisica e Riabilitazione (IMFR), via Gervasutta 48 Udine (UD), Italy
| | - Alberto Della Mora
- Department of Experimental Clinical Medicine, University of Udine, Piazzale Kolbe 3 Udine, Italy
| | | | - Fulvia Ortolani
- Department of Experimental Clinical Medicine, University of Udine, Piazzale Kolbe 3 Udine, Italy
| | - Giuliano Taccola
- Neuroscience Department, International School for Advanced Studies (SISSA), via Bonomea 265 Trieste, (TS), Italy.,SPINAL (Spinal Person Injury Neurorehabilitation Applied Laboratory), Istituto di Medicina Fisica e Riabilitazione (IMFR), via Gervasutta 48 Udine (UD), Italy
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Arendt A, Baz ES, Stengl M. Functions of corazonin and histamine in light entrainment of the circadian pacemaker in the Madeira cockroach,Rhyparobia maderae. J Comp Neurol 2016; 525:1250-1272. [DOI: 10.1002/cne.24133] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 09/20/2016] [Accepted: 10/12/2016] [Indexed: 01/02/2023]
Affiliation(s)
- Andreas Arendt
- Animal Physiology, Department of Biology; University of Kassel; 34132 Kassel Germany
| | - El-Sayed Baz
- Animal Physiology, Department of Biology; University of Kassel; 34132 Kassel Germany
- Department of Zoology, Faculty of Science; Suez Canal University; 41522 Ismailia Governorate Egypt
| | - Monika Stengl
- Animal Physiology, Department of Biology; University of Kassel; 34132 Kassel Germany
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