Role of TGF-ß Signaling in Remodeling of Noncoronary Artery Aneurysms in Kawasaki Disease.
Pediatr Dev Pathol
; 18(4): 310-7, 2015.
Article
em En
| MEDLINE
| ID: mdl-25856633
ABSTRACT
Coronary artery aneurysms (CAA) remain an important complication of Kawasaki disease (KD), the most common form of pediatric acquired heart disease in developed countries. Potentially life-threatening CAA develop in 25% of untreated children and 5% of children treated with high-dose intravenous immunoglobulin during the acute phase of the self-limited vasculitis. Noncoronary artery aneurysms (NCAA) in extraparenchymal, muscular arteries occur in a minority of patients with KD who also have CAA, yet little is understood about their formation and remodeling. We postulated that activation of the transforming growth factor-ß (TGF-ß) pathway in KD may influence formation and remodeling of aneurysms in iliac, femoral, and axillary arteries, the most common sites for NCAA. We studied a resected axillary artery from one adult and endarterectomy tissue from the femoral artery from a second adult, both with a history of CAA and NCAA following KD in infancy. Histology of the axillary artery aneurysm revealed destruction of the internal elastic lamina and recanalization of organized thrombus, while the endarterectomy specimen showed dense calcification and luminal myofibroblastic proliferation. Immunohistochemistry for molecules in the TGF-ß signaling pathway revealed increased expression of TGF-ß2, TGF-ß receptor 2, and phosphorylated SMAD3. These findings suggest ongoing tissue remodeling of the aneurysms decades after the acute injury and demonstrate the importance of the TGF-ß signaling pathway in this process.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Artéria Axilar
/
Transdução de Sinais
/
Fator de Crescimento Transformador beta2
/
Artéria Femoral
/
Aneurisma
/
Síndrome de Linfonodos Mucocutâneos
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Pediatr Dev Pathol
Ano de publicação:
2015
Tipo de documento:
Article