| Texto completo | |
| Autor(es): |
Mendes, Cristina Eusebio
;
Palombit, Kelly
;
Pereira, Thaira Thalita Alves
;
Magalhaes, Henrique Inhauser Riceti
;
Caetano, Marcos Antontio Ferreira
;
Castelucci, Patricia
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACTA HISTOCHEMICA; v. 125, n. 1, p. 13-pg., 2022-12-07. |
| Resumo | |
The P2X7 receptor participates in several intracellular events and acts with the pannexin-1 channel. This study examined the effects of probenecid (PB) and brilliant blue G (BBG), which are antagonists of the pannexin-1 channel and P2X7 receptor, respectively, on rat ileum enteric glial cells after on ischemia and reperfusion. The ileal vessels were occluded for 45 min with nontraumatic vascular tweezers, and reperfusion was performed for periods of 24 h and 14 and 28 days. After ischemia (IR groups), the animals were treated with BBG (BG group) or PB (PB group). The double-labeling results demonstrated the following: the P2X7 receptor was present in enteric glial cells (S100 beta) and enteric neurons positive for HuC/D; enteric glial cells exhibited different phenotypes; some enteric glial cells were immunoreactive to only S100 beta or GFAP; and the pannexin-1 channel was present in enteric glial cells (GFAP). Density (in cells/cm2) analyses showed that the IR group exhibited a decrease in the number of cells immunoreactive for the P2X7 receptor, pannexin-1, and HuC/D and that treatment with BBG or PB resulted in the recovery of the numbers of these cells. The number of glial cells (S100 beta and GFAP) was higher in the IR group, and the treatments decreased the number of these cells to the normal value. However, the PB group did not exhibit recovery of S100 beta-positive glia. The cell profile area (mu m2) of S100 beta-positive enteric glial cells decreased to the normal value after BBG treatment, whereas no recovery was observed in the PB group. The ileum contractile activity was decreased in the IR group and returned to baseline in the BG and PB groups. BBG and PB can effectively induce the recovery of neurons and glia cells and are thus potential therapeutic agents in the treatment of gastrointestinal tract diseases. (AU) | |
| Processo FAPESP: | 15/22299-3 - Estudo do canal panexina-1 no plexo mioentérico do íleo de ratos submetidos a isquemia e reperfusão |
| Beneficiário: | Thaira Thalita Alves Pereira |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |
| Processo FAPESP: | 12/00259-1 - Papel do antagonista brilliant blue green (BBG) sobre o receptor P2X7 e o sistema nervoso entérico do íleo de ratos submetidos a isquemia e reperfusão intestinal: estudo morfofuncional |
| Beneficiário: | Patricia Castelucci |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/07862-1 - Estudo do efeito da colite ulcerativa experimental no sistema nervoso entérico de camundongos deficientes do receptor P2X7 (P2X7-/-) |
| Beneficiário: | Patricia Castelucci |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 14/25927-2 - Aspectos morfológicos, moleculares e funcionais da interação entre o receptor P2X7 e a panexina-1 nas células gliais entéricas após a isquemia/reperfusão intestinal |
| Beneficiário: | Patricia Castelucci |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |