Endostatin exerts radiosensitizing effect in non-small cell lung cancer cells by inhibiting VEGFR2 expression
Clin. transl. oncol. (Print)
; 18(1): 18-26, ene. 2016. ilus, graf
Artigo
em Inglês
| IBECS
| ID: ibc-148047
Biblioteca responsável:
ES1.1
Localização: BNCS
ABSTRACT
Background. To determine the effects of endostatin on vascular growth factor receptor 2 (VEGFR2) expression in non-small cell lung cancer (NSCLC) cells and the mechanisms underlying its radiosensitizing effect. Methods. VEGFR2 mRNA levels were determined in different NSCLC cell lines using qRT-PCR. RT-PCR and Western blot assays were used to assess the expression of mRNA and proteins. The radiosensitivity of the cells was determined by colony-formation assays; and cell apoptosis and cell cycle distribution were determined by flow cytometry. Results. VEGFR2 mRNA levels differed among the five NSCLC cell lines (P < 0.01), with the highest expression in Calu-1 cells and lowest in A549 cells. Endostatin significantly inhibited the growth of Calu-1 cells (P < 0.01) (IC20 = 296.5 μg/ml), and the expression of VEGFR2 and HIF-1α (P < 0.05). Phosphorylation of protein kinase B (Akt), extracellular signal-regulated kinases 1/2 (ERK1/2), and p38 were significantly lower in endostatin-treated cells than control (P < 0.05). Endostatin enhanced the radiosensitivity of Calu-1 cells to SER = 1.38 and induced apoptosis (P < 0.01) and G2/M blockage (P < 0.01). However, endostatin had limited effects on A549 cells. Compared with Calu-1 cells, there was not significantly effects on cell radiosensitivity (SER = 1.09). Conclusions. Endostatin induces apoptosis and enhances radiosensitivity of the VEGFR2 high-expressing cell line Calu-1, but it has a limited effect on the VEGFR2 low-expressing cell line A549 (AU)
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Coleções:
Bases de dados nacionais
/
Espanha
Contexto em Saúde:
ODS3 - Meta 3.4 Reduzir as mortes prematuras devido doenças não transmissíveis
Problema de saúde:
Outras Doenças Respiratórias
/
Neoplasias do Pulmão, Traqueia e Brônquios
Base de dados:
IBECS
Assunto principal:
Células Gigantes
/
Apoptose
/
Carcinoma Pulmonar de Células não Pequenas
/
Citometria por Imagem
/
Endostatinas
/
Linfonodos
Tipo de estudo:
Estudo de avaliação
Limite:
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
Clin. transl. oncol. (Print)
Ano de publicação:
2016
Tipo de documento:
Artigo
Instituição/País de afiliação:
Lianyungang First Peoples Hospital/China
/
Xuzhou Medical College Graduate Academy/China