Altered claudin-4 expression in progesterone-treated endometrial adenocarcinoma cell line Ishikawa.
Int J Gynecol Cancer
; 22(9): 1585-90, 2012 Nov.
Article
en En
| MEDLINE
| ID: mdl-23095775
OBJECTIVE: To detect the expression change of claudin-4 in Ishikawa endometrial adenocarcinoma cell line in response to progesterone. To determine whether claudin-4 is involved in the anticancer effect of progesterone. METHODS: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was used to determine the 50% inhibitory concentration (IC50) of megestrol acetate (MA) in treating Ishikawa cells. After the Ishikawa cells were treated with MA at IC50, cell apoptosis was examined by flow cytometry and transmission electron microscopy. The messenger RNA and protein expression levels of claudin-4 were further quantified by real-time polymerase chain reaction and Western blot. The localization of claudin-4 was examined by immunofluorescent staining. RESULTS: The IC50 of MA on Ishikawa cells was 15 mg/L incubated for 72 hours. Apoptosis percentage was elevated from 0.07% ± 0.02% to 3.93% ± 0.81% after MA treatment. The expression of claudin-4 at both protein and messenger RNA levels was significantly decreased after the treatment of MA (P < 0.05). The localization of claudin-4 transferred from cytomembrane to cytoplasm and nucleus. CONCLUSION: Megestrol acetate can inhibit the growth of Ishikawa cells. It may work through decreasing claudin-4 expression and cell apoptosis. The localization change of claudin-4 may also be involved in the anticancer effect of progesterone.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Progesterona
/
Adenocarcinoma
/
Regulación Neoplásica de la Expresión Génica
/
Neoplasias Endometriales
/
Claudina-4
Límite:
Female
/
Humans
Idioma:
En
Revista:
Int J Gynecol Cancer
Asunto de la revista:
GINECOLOGIA
/
NEOPLASIAS
Año:
2012
Tipo del documento:
Article
Pais de publicación:
Reino Unido