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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Impaired central respiratory chemoreflex in an experimental genetic model of epilepsy

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Author(s):
Totola, Leonardo T. ; Takakura, Ana C. ; Oliveira, Jose Antonio C. ; Garcia-Cairasco, Norberto ; Moreira, Thiago S.
Total Authors: 5
Document type: Journal article
Source: JOURNAL OF PHYSIOLOGY-LONDON; v. 595, n. 3, p. 983-999, FEB 2017.
Web of Science Citations: 10
Abstract

Respiratory disorders may involve changes in serotonergic neurotransmission at the level of the chemosensitive neurons located in the retrotrapezoid nucleus (RTN). Here, we investigated the central respiratory chemoreflex and the role of serotonergic neurotransmission in the RTN with a rat model of tonic-clonic seizures, the Wistar audiogenic rat (WAR). We found that naive or kindled WARs have reduced resting ventilation and ventilatory response to hypercapnia (7% CO2). The number of chemically coded (Phox2b(+)/TH-) RTN neurons, as well as the serotonergic innervation to the RTN, was reduced in WARs. We detected that the ventilatory response to serotonin (1 mM, 50 nl) within the RTN region was significantly reduced in WARs. Our results uniquely demonstrated a respiratory impairment in a genetic model of tonic-clonic seizures, the WAR strain. More importantly, we demonstrated an overall decrease in the number of neurons located in the ventral respiratory column (VRC), as well as a reduction in serotonergic neurons in the midline medulla. This is an important step forward to demonstrate marked changes in neuronal activity and breathing impairment in the WAR strain, a genetic model of epilepsy. (AU)

FAPESP's process: 14/22406-1 - Respiratory anatomofunctional changes observed in an experimental model of Parkinson Disease
Grantee:Ana Carolina Thomaz Takakura
Support type: Regular Research Grants
FAPESP's process: 05/56447-7 - Research through images from high field magnetic resonance aimed at studies in humans
Grantee:João Pereira Leite
Support type: Inter-institutional Cooperation in Support of Brain Research (CINAPCE) - Thematic Grants