Bleomycin inhibits proliferation and promotes apoptosis of brain glioma cells via TGF-ß/Smad signaling pathway.
J BUON
; 25(2): 1076-1083, 2020.
Article
en En
| MEDLINE
| ID: mdl-32521909
ABSTRACT
PURPOSE:
To investigate the influence of bleomycin (BLM) on the proliferation and apoptosis of brain glioma cells through transforming growth factor-ß (TGF-ß)/Smads signaling pathway.METHODS:
The U87 brain glioma cells were cultured in vitro and reacted with different concentrations of BLM (5 and 10 mU/mL), and the cell growth status of each group was observed under a microscope. The cell proliferation activity was detected using Cell Counting Kit-8 (CCK-8) assay, the percentage of 5-Ethynyl-2'-deoxyuridine (EdU)-positive cells in each group was determined via EdU staining, and the apoptosis of U87 cells was tested by means of terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) staining. In addition, reverse transcription-polymerase chain reaction (RT-PCR) was performed to measure the messenger ribonucleic acid (mRNA) levels of genes related to proliferation, apoptosis and the TGF-ß/Smads signaling pathway. Finally, western blotting assay was performed to analyze the expression of the TGF-ß/Smads signaling pathway.RESULTS:
In the 5 mU/mL BLM group, the glioma cells were in a poor growth status, with a low density, while the 10 mU/mL BLM group exhibited the poorest growth status and the lowest density, and the morphological structure trended toward normal. It was discovered via CCK-8 assay and EdU staining that the number of cells and proliferation activity were decreased markedly in the 10 mU/mL BLM group. According to TUNEL staining, 10 mU/mL BLM group had remarkably increased apoptotic cells, while negative control (NC) group had fewer apoptotic cells. The gene assay results revealed that the gene expressions of Bcl-2 and TGF-ß1 declined notably in the 10 mU/mL BLM group but rose in the NC group, and the gene expression trends of Caspase-3 and Smad4 were the opposite. The protein assay results manifested that the expressions of TGF-ß1 was obviously reduced, while that of Smad4 was evidently raised in the 10 mU/mL BLM group.CONCLUSION:
BLM at an appropriate concentration can inhibit the proliferation and promote apoptosis of brain glioma cells by repressing the TGF-ß/Smads signaling pathway, thus ameliorating and treating brain glioma and other related diseases.
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Banco de datos:
MEDLINE
Asunto principal:
Bleomicina
/
Apoptosis
/
Proliferación Celular
/
Factor de Crecimiento Transformador beta1
/
Glioma
/
Antibióticos Antineoplásicos
Límite:
Humans
Idioma:
En
Revista:
J BUON
Asunto de la revista:
NEOPLASIAS
Año:
2020
Tipo del documento:
Article
País de afiliación:
China