Cannabinoid Receptor Type 2 Agonist Attenuates Acute Neurogenic Pulmonary Edema by Preventing Neutrophil Migration after Subarachnoid Hemorrhage in Rats.
Acta Neurochir Suppl
; 121: 135-9, 2016.
Article
em En
| MEDLINE
| ID: mdl-26463937
ABSTRACT
We evaluated whether JWH133, a selective cannabinoid type 2 receptor (CB2R) agonist, prevented neurogenic pulmonary edema (NPE) after subarachnoid hemorrhage (SAH) by attenuating inflammation. Adult male rats were assigned to six groups sham-operated, SAH with vehicle, SAH with JWH133 (0.3, 1.0, or 3.0 mg/kg) treatment 1 h after surgery, and SAH with JWH133 (1.0 mg/kg) at 1 h with a selective CB2R antagonist, SR144528 (3.0 mg/kg). The perforation model of SAH was performed and pulmonary wet-to-dry weight ratio was evaluated 24 and 72 h after surgery. Western blot analyses and immunohistochemistry were evaluated 24 h after surgery. JWH133 (1.0 mg/kg) significantly and most strongly improved lung edema 24 h after SAH. SR144528 administration significantly reversed the effects of JWH133 (1.0 mg/kg). SAH-induced increasing levels of myeloperoxidase (MPO) and decreasing levels of a tight junction (TJ) protein, junctional adhesion molecule (JAM)-A, were ameliorated by JWH133 (1.0 mg/kg) administration 24 h after SAH. Immunohistochemical assessment also confirmed substantial leukocyte infiltration in the outside of vessels in SAH, which were attenuated by JWH133 (1.0 mg/kg) injection. CB2R agonist ameliorated lung permeability by inhibiting leukocyte trafficking and protecting tight junction proteins in the lung of NPE after SAH.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Edema Pulmonar
/
Hemorragia Subaracnóidea
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Canabinoides
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Movimento Celular
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Receptor CB2 de Canabinoide
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Agonistas de Receptores de Canabinoides
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Pulmão
/
Neutrófilos
Tipo de estudo:
Etiology_studies
Limite:
Animals
Idioma:
En
Revista:
Acta Neurochir Suppl
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Estados Unidos