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Ryuichi Okayasu
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Journal Articles

Abstract 3961: Effectiveness of the combined treatment with hsp90 inhibitor and heavy ion irradiation

Ryuichi Okayasu, Aya Masaoka, Hirokazu Hirakawa, Hiroshi Fujisawa, Shigeaki Sunada, Ryoichi Hirayama, Miho Noguchi, Huizi Li, Akira Fujimori
Journal: Cancer Research
Cancer Res (2014) 74 (19_Supplement): 3961.
https://doi.org/10.1158/1538-7445.AM2014-3961
Published: 01 October 2014
View article titled, Abstract 3961: Effectiveness of the combined treatment with hsp90 inhibitor and heavy ion irradiation
Journal Articles

Effects of Carbon Ion Beam on Putative Colon Cancer Stem Cells and Its Comparison with X-rays

Xing Cui, Kazuhiko Oonishi, Hirohiko Tsujii, Takeshi Yasuda, Yoshitaka Matsumoto, Yoshiya Furusawa, Makoto Akashi, Tadashi Kamada, Ryuichi Okayasu
Journal: Cancer Research
Cancer Res (2011) 71 (10): 3676–3687.
https://doi.org/10.1158/0008-5472.CAN-10-2926
Published: 15 May 2011
View article titled, Effects of Carbon Ion Beam on Putative Colon Cancer Stem Cells and Its Comparison with X-rays
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Includes: Supplementary data
Journal Articles

Abstract 504: First in vitro radiobiological characterizations of cells from chordoma origin

Takamitsu Kato, Akihisa Tsuda, Akira Fujimori, Tadashi Kamada, Hirohiko Tsujii, Ryuichi Okayasu
Journal: Cancer Research
Cancer Res (2010) 70 (8_Supplement): 504.
https://doi.org/10.1158/1538-7445.AM10-504
Published: 15 April 2010
View article titled, Abstract 504: First in vitro radiobiological characterizations of cells from chordoma origin
Journal Articles

Sulforaphane exerts its biological effects by introducing DNA double strand breaks

Emiko Sekine, Dong Yu, Akira Fujimori, Kazunori Anzai, Nobuo Kubota, Ryuichi Okayasu
Journal: Cancer Research
Cancer Res (2008) 68 (9_Supplement): 631.
Published: 01 May 2008
View article titled, Sulforaphane exerts its biological effects by introducing DNA double strand breaks
Journal Articles

Downregulation of BRCA2 enhances tumor radio-sensitivity through inhibition of homologous recombination repair

Dong Yu, Emiko Sekine, Akira Fujimori, Ryuichi Okayasu
Journal: Cancer Research
Cancer Res (2007) 67 (9_Supplement): 3907.
Published: 01 May 2007
View article titled, Downregulation of BRCA2 enhances tumor radio-sensitivity through inhibition of homologous recombination repair
Journal Articles

extremely low-dose ionizing radiation upregulates CXC chemokines in normal human fibroblasts

Akira Fujimori, Katsutoshi Suetomi, Keiji Kinoshita, Ayako Kojima, Yaqun Fang, Ayako Egusa, Ryuichi Okayasu
Journal: Cancer Research
Cancer Res (2006) 66 (8_Supplement): 1039.
Published: 15 April 2006
View article titled, extremely low-dose ionizing radiation upregulates CXC chemokines in normal human fibroblasts
Journal Articles

Extremely Low Dose Ionizing Radiation Up-regulates CXC Chemokines in Normal Human Fibroblasts

Akira Fujimori, Ryuichi Okayasu, Hiroshi Ishihara, Satoshi Yoshida, Kiyomi Eguchi-Kasai, Kumie Nojima, Satoru Ebisawa, Sentaro Takahashi
Journal: Cancer Research
Cancer Res (2005) 65 (22): 10159–10163.
https://doi.org/10.1158/0008-5472.CAN-05-2015
Published: 15 November 2005
View article titled, Extremely Low Dose Ionizing Radiation Up-regulates CXC Chemokines in Normal Human Fibroblasts
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Journal Articles

High LET radiation affects non-homologous end joining repair in human cells

Ryuichi Okayasu, Maki Okada, Atsushi Okabe, Sentaro Takahashi
Journal: Cancer Research
Cancer Res (2005) 65 (9_Supplement): 346.
Published: 01 May 2005
View article titled, High LET radiation affects non-homologous end joining repair in human cells
Journal Articles

Silencing Expression of the Catalytic Subunit of DNA-dependent Protein Kinase by Small Interfering RNA Sensitizes Human Cells for Radiation-induced Chromosome Damage, Cell Killing, and Mutation

Yuanlin Peng, Qinming Zhang, Hatsumi Nagasawa, Ryuichi Okayasu, Howard L. Liber, Joel S. Bedford
Journal: Cancer Research
Cancer Res (2002) 62 (22): 6400–6404.
Published: 15 November 2002
View article titled, Silencing Expression of the Catalytic Subunit of DNA-dependent Protein Kinase by Small Interfering RNA Sensitizes Human Cells for Radiation-induced Chromosome Damage, Cell Killing, and Mutation
Open the PDF for Silencing Expression of the Catalytic Subunit of DNA-dependent Protein Kinase by Small Interfering RNA Sensitizes Human Cells for Radiation-induced Chromosome Damage, Cell Killing, and Mutation in another window
Journal Articles

Elevated Breast Cancer Risk in Irradiated BALB/c Mice Associates with Unique Functional Polymorphism of the Prkdc (DNA-dependent Protein Kinase Catalytic Subunit) Gene

Yongjia Yu, Ryuichi Okayasu, Michael M. Weil, Andy Silver, Maureen McCarthy, Ryan Zabriskie, Scott Long, Roger Cox, Robert L. Ullrich
Journal: Cancer Research
Cancer Res (2001) 61 (5): 1820–1824.
Published: 01 March 2001
View article titled, Elevated Breast Cancer Risk in Irradiated BALB/c Mice Associates with Unique Functional Polymorphism of the <em>Prkdc</em> (DNA-dependent Protein Kinase Catalytic Subunit) Gene
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Journal Articles

A Deficiency in DNA Repair and DNA-PKcs Expression in the Radiosensitive BALB/c Mouse

Ryuichi Okayasu, Katsutoshi Suetomi, Yongjia Yu, Andy Silver, Joel S. Bedford, Roger Cox, Robert L. Ullrich
Journal: Cancer Research
Cancer Res (2000) 60 (16): 4342–4345.
Published: 01 August 2000
View article titled, A Deficiency in DNA Repair and DNA-PKcs Expression in the Radiosensitive BALB/c Mouse
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Journal Articles

Asbestos and DNA Double Strand Breaks

Ryuichi Okayasu, Sentaro Takahashi, Shigeru Yamada, Tom K. Hei, Robert L. Ullrich
Journal: Cancer Research
Cancer Res (1999) 59 (2): 298–300.
Published: 15 January 1999
View article titled, Asbestos and DNA Double Strand Breaks
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Journal Articles

Defective Repair of DNA Double-Strand Breaks and Chromosome Damage in Fibroblasts from a Radiosensitive Leukemia Patient

Christophe Badie, George Iliakis, Nicolas Foray, Ghazi Alsbeih, Gabriel E. Pantellias, Ryuichi Okayasu, Nge Cheong, Nicola S. Russell, Adrian C. Begg, Colin F. Arlett, Edmond P. Malaise
Journal: Cancer Research
Cancer Res (1995) 55 (6): 1232–1234.
Published: 01 March 1995
View article titled, Defective Repair of DNA Double-Strand Breaks and Chromosome Damage in Fibroblasts from a Radiosensitive Leukemia Patient
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Journal Articles

Mitosis-promoting Factor Activity of Inducer Mitotic Cells May Affect Radiation Yield of Interphase Chromosome Breaks in the Premature Chromosome Condensation Assay

Xinbo Cheng, Gabriel E. Pantelias, Ryuichi Okayasu, Nge Cheong, George Iliakis
Journal: Cancer Research
Cancer Res (1993) 53 (23): 5592–5596.
Published: 01 December 1993
View article titled, Mitosis-promoting Factor Activity of Inducer Mitotic Cells May Affect Radiation Yield of Interphase Chromosome Breaks in the Premature Chromosome Condensation Assay
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