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Dexmedetomidine Oral Mucosa Patch for Sedation Suppresses Apoptosis in Hippocampus of Normal Rats / 대한배뇨장애요실금학회지
International Neurourology Journal ; : S39-S47, 2017.
Artigo em Inglês | WPRIM | ID: wpr-191803
ABSTRACT

PURPOSE:

Dexmedetomidine, an α2-adrenergic agonist, provides sedative and analgesic effects without significant respiratory depression. Dexmedetomidine has been suggested to have an antiapoptotic effect in response to various brain insults. We developed an oral mucosa patch using dexmedetomidine for sedation. The effects of the dexmedetomidine oral mucosa patch on cell proliferation and apoptosis in the hippocampus were evaluated.

METHODS:

A hydrogel oral mucosa patch was adhered onto the oral cavity of physiologically normal rats, and was attached for 2 hours, 6 hours, 12 hours, or 24 hours. Plasma dexmedetomidine concentrations were determined by liquid chromatography– electrospray ionization–tandem mass spectrometry–multiple-ion reaction monitoring (LC-ESI-MS/MS-MRM). Cell proliferation in the hippocampus was detected by Ki-67 immunohistochemistry. Caspase-3 immunohistochemistry, terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling staining, and Western blotting for Bax and Bcl-2 were performed to detect hippocampal apoptosis. The levels of brain-derived neurotrophic factor (BDNF) and tyrosine kinase B (TrkB) in the hippocampus were also measured by Western blotting.

RESULTS:

Plasma dexmedetomidine concentration increased according to the attachment time of the dexmedetomidine oral mucosa patch. Hippocampal cell proliferation did not change due to the dexmedetomidine oral mucosa patch, and the dexmedetomidine oral mucosa patch exerted no significant effect on BDNF or TrkB expression. In contrast, the dexmedetomidine oral mucosa patch exerted an antiapoptotic effect depending on the attachment time of the dexmedetomidine oral mucosa patch.

CONCLUSIONS:

A dexmedetomidine oral mucosa patch can be used as a convenient tool for sedation, and is of therapeutic value due to its antiapoptotic effects under normal conditions.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Plasma / Insuficiência Respiratória / Encéfalo / Proteínas Tirosina Quinases / Imuno-Histoquímica / Western Blotting / Apoptose / Fator Neurotrófico Derivado do Encéfalo / Hidrogéis / Dexmedetomidina Limite: Animais Idioma: Inglês Revista: International Neurourology Journal Ano de publicação: 2017 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Plasma / Insuficiência Respiratória / Encéfalo / Proteínas Tirosina Quinases / Imuno-Histoquímica / Western Blotting / Apoptose / Fator Neurotrófico Derivado do Encéfalo / Hidrogéis / Dexmedetomidina Limite: Animais Idioma: Inglês Revista: International Neurourology Journal Ano de publicação: 2017 Tipo de documento: Artigo