Increased expressions of claudin 4 and 7 in atypical adenomatous hyperplasia and adenocarcinoma of the lung.
Med Mol Morphol
; 49(3): 163-9, 2016 Sep.
Article
em En
| MEDLINE
| ID: mdl-26872891
ABSTRACT
Abnormal expression of claudin (Cldn), the main constituent of tight junctions, may play a crucial role in carcinogenesis. To elucidate these abnormalities of tight junctions in lung adenocarcinoma during carcinogenesis, we examined immunohistochemical expressions of Cldn4 and Cldn7 in human lung resection materials. Lung resection specimens from 86 patients were studied, including 16 atypical adenomatous hyperplasia (AAH), 19 adenocarcinoma in situ (AIS), 32 invasive adenocarcinoma (ADC), 5 AIS with AAH, 2 ADC with AAH, 10 ADC with AIS, and 2 ADC with AIS and AAH. The immunohistochemical staining (IHC) score was defined for both the extent and intensity of staining. IHC score for Cldn4 in AIS and ADC was significantly higher than that in alveolar epithelium (AE) and AAH (p < 0.001 for both). In addition, the AAH score was significantly higher than that in AE (p < 0.001). The Cldn7 score in ADC was significantly increased compared with AE and AAH (p < 0.001 for both). These results suggested that increase of Cldn4-expression may be involved in early molecular events during carcinogenesis of adenocarcinoma, whereas increase of Cldn7-expression may be associated with tumor invasion or progression.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Adenocarcinoma
/
Adenoma
/
Claudinas
/
Claudina-4
/
Neoplasias Pulmonares
Limite:
Humans
Idioma:
En
Revista:
Med Mol Morphol
Assunto da revista:
BIOLOGIA MOLECULAR
/
PATOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Japão