Your browser doesn't support javascript.
loading
Bacillus spp. or Bacillus spp.-Derived Membrane Vesicles Induce the Intrinsic Pathways of Apoptosis of Human Colon Cancer Cell Lines
Journal of Bacteriology and Virology ; : 84-92, 2016.
Artigo em Coreano | WPRIM | ID: wpr-153897
ABSTRACT
The striking increase in colorectal cancer (CRC) has shown the great fatality in Korea for more than 15 years. The leading edge of this rising incidence rate is mainly due to the people's dietary changes in Korea. Some studies have reported that the dietary fiber does not have significant cytotoxic effects on CRC cells, which contrasts to the effects of probiotics. It gives a positive evaluation that the nonpathogenic spore-forming Bacillus species among the probiotics including fermented bacteria might have optimistic effects on CRC incidence rate. Recently, we isolated Bacillus lentus (BL) from Korean soybean fermented food. BL showed the cytotoxic effect on human colon carcinoma cell lines HCT116 and SW480. Interestingly, BL did not have effect on human dermal fibroblast cells and human hepatoma cell line HepG2. It suggested that BL has the target cell-specific cytotoxicity toward human colon carcinoma cells. To clarify the death signaling pathway underlying the BL-induced apoptosis in cancer cells, we analyzed the expression of caspases, Bax and Bcl-2 by western blotting. The apoptotic effects by cytotoxic elements were executed by direct BL contact or membrane-derived vesicles isolated from BL. Treatment of HCT116 with BL activated caspase-9, -3 and increased cleavage form of poly (ADP-ribose) polymerase (PARP). However, caspase-8 activity was not increased by BL. BL-activated intrinsic pathway increased the pro-apoptotic Bax, decreased the anti-apoptotic Bcl-2 proteins on mitochondria, disrupted the mitochondrial membrane potential, and then released the cytochrome c from mitochondria. The membrane-derived vesicles (MVs) from BL induced apoptosis of the HCT116. Here, we propose that BL as a strong candidate for the development of apoptosis-specific anti-tumor agent will give great contribution to the understandings of the tumor-microbe interdisciplinary areas.
Assuntos

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Glycine max / Greve / Bacillus / Bactérias / Fibras na Dieta / Neoplasias Colorretais / Linhagem Celular / Western Blotting / Incidência / Apoptose Tipo de estudo: Estudo de incidência / Estudo prognóstico Limite: Humanos País/Região como assunto: Ásia Idioma: Coreano Revista: Journal of Bacteriology and Virology Ano de publicação: 2016 Tipo de documento: Artigo

Similares

MEDLINE

...
LILACS

LIS

Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Glycine max / Greve / Bacillus / Bactérias / Fibras na Dieta / Neoplasias Colorretais / Linhagem Celular / Western Blotting / Incidência / Apoptose Tipo de estudo: Estudo de incidência / Estudo prognóstico Limite: Humanos País/Região como assunto: Ásia Idioma: Coreano Revista: Journal of Bacteriology and Virology Ano de publicação: 2016 Tipo de documento: Artigo