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Acta Biochim Biophys Sin (Shanghai). 2016 Sep;48(9):850-5. doi: 10.1093/abbs/gmw067. Epub 2016 Jul 22.

PU.1-Bim axis is involved in Trichostatin A-induced apoptosis in murine pro-B lymphoma FL5.12 cells.

Author information

1
Infection and Immunity Laboratory, Kunming National High-level Biosafety Primate Research Center, Institute of Medical Biology, Chinese Academy of Medical Science & Peking Union Medical College, Kunming 650118, China.
2
Kunming University of Science and Technology, Kunming 650118, China.
3
Infection and Immunity Laboratory, Kunming National High-level Biosafety Primate Research Center, Institute of Medical Biology, Chinese Academy of Medical Science & Peking Union Medical College, Kunming 650118, China lhq@imbcams.com.cn.

Abstract

Trichostatin A (TSA) is a well-known histone deacetylases (HDACs) inhibitor that has been reported to show potent anti-tumor capabilities in some types of cancer cell lines. However, detailed mechanism of TSA action on lymphoma remains to be described. In the present study, anti-proliferative effects of TSA were investigated using a murine pro-B lymphoma cell line FL5.12. MTT assay revealed that TSA potently inhibited the proliferation of FL5.12 cells in a time- and dose-dependent manner. Bright-field microscopy of FL5.12 cells showed apoptotic morphology at 24 h after TSA treatment. Consistently, TSA treatment led to DNA fragmentation and increased the protein levels of cleaved caspase 3 and PARP as revealed by western blot analysis. To explore the underlying mechanism of TSA-induced apoptosis of FL5.12 cells, we further analyzed the hematopoietic transcription factor Purine Rich Box-1 (PU.1) by western blot analysis. TSA treatment resulted in the inhibition of PU.1 in FL5.12 cells. In contrast, apoptotic protein Bim was induced by TSA, which was inversely correlated with the survival of FL5.12 cells. These results suggest the possible mechanism of TSA-induced apoptosis in murine pro-B lymphoma FL5.12 cells via the PU.1-Bim axis.

KEYWORDS:

apoptosis; chemotherapy; histone deacetylases inhibitor; lymphoma; transcription factor

PMID:
27451443
DOI:
10.1093/abbs/gmw067
[Indexed for MEDLINE]

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