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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.)

Neurotoxic lesions of the pedunculopontine tegmental nucleus impair the elaboration of postictal antinociception

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de Oliveira, Rithiele Cristina [1] ; de Oliveira, Ricardo [1, 2, 3] ; Falconi-Sobrinho, Luiz Luciano [1, 3] ; Biagioni, Audrey Franceschi [1, 4] ; Almada, Rafael Carvalho [1, 3] ; dos Anjos-Garcia, Tayllon [1] ; Bazaglia-de-Sousa, Guilherme [1] ; Khan, Asmat Ullah [1, 5] ; Coimbra, Norberto Cysne [1, 3, 6]
Total Authors: 9
[1] Univ Sao Paulo, Ribeirao Preto Med Sch, FMRP, Lab Neuroanat & Neuropsychobiol, Dept Pharmacol, Av Bandeirantes 3900, BR-14049900 Ribeirao Preto, SP - Brazil
[2] Univ Fed Mato Grosso, Med Sch UFMT, Av Alexandre Ferronato 1200, Reserva 35, BR-78550000 Sinop, Mato Grosso - Brazil
[3] Behav Neurosci Inst INeC, Ave Cafe 2450, BR-14220030 Ribeirao Preto, SP - Brazil
[4] Scuola Super Avanzati Trieste SISSA, Via Bonomea 265, I-34136 Trieste, TS - Italy
[5] Univ Poonch Rawalakot, Sch Med & Hlth Sci, Dept Eastern Med & Surg, Hajira Rd, Rawalakot 12350, Azad Jammu & Ka - Pakistan
[6] Univ Sao Paulo, Multiuser Ctr Neuroelectrophysiol, Ribeirao Preto Med Sch, Dept Anat & Surg, FMRP, Av Bandeirantes 3900, BR-14049900 Ribeirao Preto, SP - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Physiology & Behavior; v. 194, p. 162-169, OCT 1 2018.
Web of Science Citations: 1

Generalised tonic-clonic seizures, generated by abnormal neuronal hyper-activity, cause a significant and long-lasting increase in the nociceptive threshold. The pedunculopontine tegmental nucleus (PPTN) plays a crucial role in the regulation of seizures as well as the modulation of pain, but its role in postictal antinociceptive processes remains unclear. In the present study, we aimed to investigate the involvement of PPTN neurons in the postictal antinociception. Wistar rats had their tail-flick baseline recorded and were injected with ibotenic acid (1.0 mu g/0.2 mu L) into the PPTN, aiming to promote a local neurotoxic lesion. Five days after the neuronal damage, pentylenetetrazole (PTZ; 64 mg/kg) was intraperitoneally administered to induce tonic-clonic seizures. The tail withdrawal latency was measured immediately after the seizures (0 min) and subsequently at 10-min intervals until 130 min after the seizures were induced pharmacologically. Ibotenic acid microinjected into the PPTN did not reduce the PTZ-induced seizure duration and severity, but it diminished the postictal antinociception from 0 to 130 min after the end of the PTZ-induced tonic-clonic seizures. These results suggest that the postictal antinociception depends on the PPTN neuronal cells integrity. (AU)

FAPESP's process: 08/08955-1 - Involvement of the dorsal raphe nucleus neural networks and serotonergic Neurotransmittion in the locus coeruleus in antinociceptive processess induced by oriented escape reaction evoked by chemical stimulation of the medial hypothalamus
Grantee:Audrey Franceschi Biagioni
Support type: Scholarships in Brazil - Master
FAPESP's process: 11/09850-1 - Study of serotoninergic pathways that connect the dorsal raphe nucleus to the lateral septal area on the modulation of defensive behavior organized by periaqueductal gray performed by the prefrontal cortex
Grantee:Ricardo de Oliveira
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/10984-8 - Influence of the anterior cingulate cortex and involvement of hypothalamic NMDA and AMPA/kainite glutamatergic receptorsin the organization of the defensive behaviorand innate fear-induced antinociception elaborated by posterior hypothalamus
Grantee:Luiz Luciano Falconi Sobrinho
Support type: Scholarships in Brazil - Master
FAPESP's process: 14/10742-7 - Paresthesia as a new approach of study for panic disorder: basic and clinical research
Grantee:Audrey Franceschi Biagioni
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 09/00668-6 - Study of the involvement of cholinergic pathways form tegmentar pedunculopontine nucleus to monoaminergic nuclei of the pain endogenous inhibitory system in the post-ictal antinociception
Grantee:Norberto Cysne Coimbra
Support type: Regular Research Grants
FAPESP's process: 12/22681-7 - Involvement of opioid and endocanabinoid receptors of the substantia nigra, pars reticulata, in the modulation of the activity of Nigro-Tectal GABAergic pathways during the organization of defensive behaviour of mice confronted with venomous snakes
Grantee:Rafael Carvalho Almada
Support type: Scholarships in Brazil - Post-Doctorate