Faculty Collaboration Database

Microarray analysis of differentially expressed genes in mouse bone marrow tissues after ionizing radiation. Int J Radiat Biol 2006 Jul;82(7):511-21

Date

08/03/2006

Pubmed ID

16882623

DOI

10.1080/09553000600857389

Scopus ID

2-s2.0-33746819082 (requires institutional sign-in at Scopus site)   19 Citations

Abstract

PURPOSE: To identify differentially expressed genes in mouse bone marrow involved in radiation-induced injury.

MATERIALS AND METHODS: Microarray analysis was used to identify the differentially expressed genes and other techniques, e.g., polymerase chain reaction (PCR), western-blotting and antisense were also used to validate the results.

RESULTS: DNA microarray analysis demonstrated that the mRNA of 34 genes increased and 69 genes decreased in mouse bone marrow cells (BMC) from C57BL mice 6 h after a whole body dose of 6.5 Gy. These differentially expressed genes were involved in a number of processes including DNA replication/repair, proliferation/apoptosis, cell cycle control and RNA processing. In these experiments, a decline of the mammalian homolog Sir2a (an acronym for the silent mating type information regulation 2 homolog [SIRT1]) mRNA accompanied by an increase of P53 protein acetylation was observed in irradiated BMC. To determine whether the reduced SIRT1 is related to the higher acetylation status of P53 after irradiation, we designed and synthesized antisense oligonucleotides (AS) targeting human SIRT1 mRNA. Notably, AS transfection increased tumor protein 53 (P53) protein acetylation and bax-luciferase activity in human bone marrow stromal cell line (HS-5) after radiation. Furthermore, the AS transfer stimulated cell apoptosis in post-irradiation HS-5 cells.

CONCLUSION: Ionizing radiation (IR) affects the expression of a series of genes including genes involved in G1/S transition and the P53 pathway. Among those, reduction of SIRT1 was seen to be involved in transactivation of P53.

Author List

Dai JM, Sun DC, Lin RX, Yang J, Lou S, Wang SQ

Author

Daochun Sun PhD Assistant Professor in the Cell Biology, Neurobiology and Anatomy department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Animals
Bone Marrow
Dose-Response Relationship, Radiation
Female
Gene Expression
Gene Expression Profiling
Male
Mice
Mice, Inbred C57BL
Oligonucleotide Array Sequence Analysis
Proteome
Radiation Dosage
Radiation, Ionizing