Neuroprotective effect of oxytocin on cognitive dysfunction, DNA damage, and intracellular chloride disturbance in young mice after cranial irradiation.
Biochem Biophys Res Commun
; 612: 1-7, 2022 07 05.
Article
em En
| MEDLINE
| ID: mdl-35500436
ABSTRACT
Cranial radiation therapy (CRT) is an effective treatment for brain tumors; however, it also causes brain injuries. The pediatric brain is considered especially vulnerable compared to the adult brain; thus, brain injuries caused by CRT may severely affect their quality of life. In this study, we determined the neuroprotective effects of nasal oxytocin administration following cranial radiation in mice. We investigated the cognitive behavior of mice (novel object recognition test and novel object location test), phosphorylated histone H2AX (γ-H2AX) and K+-Cl- transporter (KCC2) by immunohistochemical analysis of the hippocampal sections, and neuronal cells by immunocytochemistry after radiation and oxytocin administration. We found that the number of γ-H2AX foci was increased, and the surface signal intensity of KCC2 immunofluorescence was decreased in cells that were irradiated with X-rays (1.5 Gy, for three consecutive days) compared with cells that were not. Furthermore, using MQAE, we found that the intracellular chloride ion concentration was downregulated in oxytocin-treated cells by increasing surface KCC2 expression. These results indicate that nasal oxytocin administration after cranial irradiation attenuates cognitive dysfunction in mice and exerts multifaceted neuroprotective effects on DNA damage and maintains chloride ion concentration in neuronal cells.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Lesões Encefálicas
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Fármacos Neuroprotetores
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Simportadores
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Disfunção Cognitiva
Limite:
Animals
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Humans
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article