Role of matrix metalloproteinases in HaCaT keratinocytes apoptosis induced by loxosceles venom sphingomyelinase D.
J Invest Dermatol
; 126(1): 61-8, 2006 Jan.
Article
en En
| MEDLINE
| ID: mdl-16417218
Envenomation by the spider Loxosceles (brown spider) can result in dermonecrosis and severe ulceration. We have previously shown that Loxosceles sphingomyelinase D (SMaseD), the enzyme responsible for these pathological effects, induced expression of matrix metalloproteinase-9 (MMP-9), which is possibly one of the main factors involved in the pathogenesis of the cutaneous loxoscelism. The aim of this study was to further investigate the molecular mechanisms triggered by Loxosceles SMaseD involved in the initiation of the dermonecrotic lesion, using HaCaT cultures, a human keratinocyte cell line, as an in vitro model for cutaneous loxoscelism. We show here that SMaseD from Loxosceles spider venom induces apoptosis in human keratinocytes, which is associated with an increased expression of metalloproteinase-2 and -9, and that the use of metalloproteinase inhibitors, such as tetracycline, may prevent cell death and potentially may prevent tissue destruction after envenomation.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Venenos de Araña
/
Queratinocitos
/
Apoptosis
/
Hidrolasas Diéster Fosfóricas
/
Metaloproteinasa 2 de la Matriz
/
Metaloproteinasa 9 de la Matriz
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
J Invest Dermatol
Año:
2006
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Estados Unidos