Potential role for epidermal Langerhans cells in nicotinic acid-induced vasodilatation in the mouse.
Inflamm Res
; 56(6): 254-61, 2007 Jun.
Article
em En
| MEDLINE
| ID: mdl-17607550
ABSTRACT
OBJECTIVE:
Our objective is to study the role of cutaneous Langerhans cells on a mouse model of nicotinic acid-induced vasodilatation.METHODS:
Nicotinic acid-induced vasodilatation was studied in the mouse ear by laser Doppler flowmetry prior to and at intervals after Langerhans cells depletion by treatment with hydrocortisone.RESULTS:
Nicotinic acid evoked a dose-dependent increase in perfusion in the mouse ear. Treatment with 1 % hydrocortisone resulted in substantial depletion of Langerhans cells, accompanied by failure to show vasodilatation in response to nicotinic acid. Partial recovery of Langerhans cells on day 53 post-treatment was associated with a partial vasodilatation response. To exclude non-specific effects of hydrocortisone on arachidonic acid metabolism, the ability of the mice to mount an edema response to phorbol 12-myristate 13-acetate was evaluated. On day 9 post hydrocortisone, phorbol 12-myristate 13-acetate failed to evoke an edema response. However, on day 22 post hydrocortisone, the edema response in the hydrocortisone-treated animals was indistinguishable from that of control animals.CONCLUSIONS:
These results suggest that Langerhans cells are responsible for nicotinic acid-induced vasodilatation.
Buscar no Google
Base de dados:
MEDLINE
Assunto principal:
Células de Langerhans
/
Epiderme
/
Niacina
Limite:
Animals
Idioma:
En
Revista:
Inflamm Res
Assunto da revista:
ALERGIA E IMUNOLOGIA
/
PATOLOGIA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos