Research Project
Grant-in-Aid for Scientific Research (C)
To understand the molecular mechanisms underlying cancer cell radioresistance, we established clinically relevant radioresistant (CRR) cells that continue to proliferate during exposure to 2 Gy/day X-rays for more than 30 days. A modified high-density survival assay for anticancer-drug screening revealed that CRR cells were resistant to an anti-microtubule agent, docetaxel (DTX). After treatment with DTX or exposure to X-rays reactive oxygen species from mitochondria (mtROS) were generated in parental cells but not in CRR cells, suggesting that the involvement of mtROS in the cross-resistance to DTX and X-rays. Mitochondrial membrane potential was lower in CRR cells than that in parental cells. Depletion of mtDNA induced DTX resistance in parental cells. In the present study, novel DTX resistant mechanism was found by investigating CRR cells and ρ0 cells which lack mitochondrial DNA.
All 2016 2015 2014 2013 Other
All Journal Article (11 results) (of which Int'l Joint Research: 1 results, Peer Reviewed: 11 results, Open Access: 7 results, Acknowledgement Compliant: 2 results) Presentation (54 results) (of which Int'l Joint Research: 1 results, Invited: 14 results) Book (2 results) Remarks (2 results)
Journal of Radiation Research
Volume: 56 Issue: suppl 1 Pages: 42-47
10.1093/jrr/rrv070
J Radiation Res
Volume: 56 Issue: suppl 1 Pages: 36-41
10.1093/jrr/rrv069
Animal Science Journal
Volume: 86 Issue: 6 Pages: 12490-12490
10.1111/asj.12490
Biochem. Funct
Volume: 33 Issue: 2 Pages: 73-79
10.1002/cbf.3090
Anim Sci J.
Volume: 86 Issue: 1 Pages: 120-124
10.1111/asj.12301
Cancer Sci
Volume: 105 Issue: 10 Pages: 1351-9
10.1111/cas.12489
Cancer Med
Volume: 3(2) Issue: 2 Pages: 310-21
10.1002/cam4.185
Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology.
Volume: 26 Pages: 80-88
Sci. Rep.
Volume: (掲載決定) Issue: 1 Pages: 2850-2856
10.1038/srep02850
PLoS One
Volume: 8(1) Issue: 1 Pages: 1-7
10.1371/journal.pone.0054312
無菌生物
Volume: 43 Pages: 46-50
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