The potential role of COX-2 in cancer stem cell-mediated canine mammary tumor initiation: an immunohistochemical study
Journal of Veterinary Science
;
: 225-231, 2015.
Artigo
em Inglês
| WPRIM
| ID: wpr-86395
ABSTRACT
Increasing evidence suggests that cancer stem cells (CSCs) are responsible for tumor initiation and maintenance. Additionally, it is becoming apparent that cyclooxygenase (COX) signaling is associated with canine mammary tumor development. The goals of the present study were to investigate COX-2 expression patterns and their effect on CSC-mediated tumor initiation in primary canine mammary tissues and tumorsphere models using immunohistochemistry. Patterns of COX-2, CD44, octamer-binding transcription factor (Oct)-3/4, and epidermal growth factor receptor (EGFR) expression were examined in malignant mammary tumor (MMT) samples and analyzed in terms of clinicopathological characteristics. COX-2 and Oct-3/4 expression was higher in MMTs compared to other histological samples with heterogeneous patterns. In MMTs, COX-2 expression correlated with tumor malignancy features. Significant associations between COX-2, CD44, and EGFR were observed in low-differentiated MMTs. Comparative analysis showed that the levels of COX-2, CD44, and Oct-3/4 expression varied significantly among TSs of three histological grades. Enhanced COX-2 staining was consistently observed in TSs. Similar levels of staining intensity were found for CD44 and Oct-3/4, but EGFR expression was weak. Our findings indicate the potential role of COX-2 in CSC-mediated tumor initiation, and suggest that COX-2 inhibition may help treat canine mammary tumors by targeting CSCs.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Células-Tronco Neoplásicas
/
Imuno-Histoquímica
/
Biomarcadores Tumorais
/
Neoplasias Mamárias Animais
/
Transformação Celular Neoplásica
/
Estudos Retrospectivos
/
Receptores de Hialuronatos
/
Doenças do Cão
/
Ciclo-Oxigenase 2
/
Fator 3 de Transcrição de Octâmero
Tipo de estudo:
Estudo observacional
/
Estudo prognóstico
Limite:
Animais
Idioma:
Inglês
Revista:
Journal of Veterinary Science
Ano de publicação:
2015
Tipo de documento:
Artigo
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