Functional Genomic Investigation of the Molecular Biological Impact of Electron Beam Radiation in Lymphoma Cells.
CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2016;
16:253-263.e6. [PMID:
27061493 DOI:
10.1016/j.clml.2016.02.033]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Revised: 01/19/2016] [Accepted: 02/18/2016] [Indexed: 11/21/2022]
Abstract
PURPOSE
The biological response of electron beam radiation (EBR) in tumors remains underexplored. This study describes the molecular biological and genomic impact of EBR on tumor cells.
METHODS
A mouse model bearing Dalton's lymphoma ascites cells was exposed to an 8-MeV pulsed electron beam, at a dose rate of 2 Gy/min using a microtron, a linear accelerator. The radiation-induced changes were assessed by histopathology, fluorescence-activated cell sorting, signaling pathway-focused reporter assays, and gene expression by microarray analysis.
RESULTS
EBR was found to increase apoptosis and G2-M cell cycle arrest with concomitant tumor regression in vivo. The microarray data revealed that EBR induced tumor regression, apoptosis, and cell cycle arrest mediated by p53, PPAR, and SMAD2/3/4 signaling pathways. Activation of interferon regulatory factor and NFkB signaling were also found upon EBR. Chemo-genomics exploration revealed the possibility of drugs that can be effectively used in combination with EBR.
CONCLUSION
For the first time, an 8-MeV pulse EBR induced genomic changes, and their consequence in molecular and biological processes were identified in lymphoma cells. The comprehensive investigation of radiation-mediated responses in cancer cells also revealed the potential therapeutic features of EBR.
Collapse