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Establishment of optimal irradiation intervals for stereotactic radiation therapy based on radiobiological experiments

Research Project

Project/Area Number 19K08183
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 52040:Radiological sciences-related
Research InstitutionNagoya City University

Principal Investigator

Tomita Natsuo  名古屋市立大学, 医薬学総合研究院(医学), 准教授 (60643781)

Co-Investigator(Kenkyū-buntansha) 芝本 雄太  名古屋市立大学, 医薬学総合研究院(医学), 教授 (20144719)
大佐賀 智  名古屋市立大学, 医薬学総合研究院(医学), 助教 (60790772)
小澤 良之  名古屋市立大学, 医学(系)研究科(研究院), 助教 (90569005)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords高精度放射線治療 / 定位照射 / 照射間隔 / 再酸素化 / 低酸素癌細胞 / 酸素癌細胞 / 定位放射線治療 / 分割照射 / 放射線生物学
Outline of Research at the Start

定位照射は大線量を少数回で治療することが特徴であり、至適照射間隔を明らかにすることが急務である。放射線治療抵抗性である腫瘍内の低酸素癌分画の変化を調査した我々の基礎実験の結果から、定位照射は連日行うより、2-3 日間隔を開けて行うほうが、より有効に再酸素化を利用でき、治療効果が高まる可能性がある。本研究では転移性脳腫瘍を対象に、定位照射の週2回法と連日照射法の無作為化比較試験を行い、定位照射の最適な照射間隔を明確にすることを試みる。

Outline of Final Research Achievements

Stereotactic radiotherapy is a minimally invasive, highly effective, and highly precise form of radiation therapy. Since this method differs significantly from the conventional dose fractionation of irradiating small doses every day, it was urgent to clarify the optimal irradiation interval. Based on our previous basic experiments, we believe that performing stereotactic irradiation at intervals of 2-3 days rather than every day may be able to more effectively utilize reoxygenation and improve the therapeutic effect. In this study, we conducted a randomized controlled trial of stereotactic irradiation twice a week versus daily irradiation for metastatic brain tumors, in an attempt to clarify the optimal irradiation interval for stereotactic irradiation. The protocol has been IRB approved and the study has been ongoing since September 2022.

Academic Significance and Societal Importance of the Research Achievements

近年、転移性脳腫瘍や早期肺癌に対して定位照射が急速に普及してきており、その他の悪性腫瘍に対しても適応が拡大している。定位照射は、従来の照射に比べ精度が特に高く、またその線量集中制により正常組織への線量を抑えた治療である。この低侵襲で治療効果の高い、高精度放射線治療である定位照射は、1回あたり大線量を少数回で治療することが特徴である。しかし毎日小線量ずつ照射する従来法の線量分割とは大きく異なるため、至適照射間隔を明らかにすることが急務であった。本研究により、この定位照射における最適な照射間隔が明らかになることが期待され、今後の臨床のおいて重要なエビデンスとなる可能性がある。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (31 results)

All 2024 2023 2022 2021 2020 2019

All Journal Article (25 results) (of which Peer Reviewed: 25 results,  Open Access: 21 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Impact of radiation doses on clinical relapse of biochemically recurrent prostate cancer after prostatectomy2024

    • Author(s)
      Takano Seiya、Tomita Natsuo、Niwa Masanari、Torii Akira、Takaoka Taiki、Kita Nozomi、Uchiyama Kaoru、Nakanishi-Imai Mikiko、Ayakawa Shiho、Iida Masato、Tsuzuki Yusuke、Otsuka Shinya、Manabe Yoshihiko、Nomura Kento、Ogawa Yasutaka、Miyakawa Akifumi、Miyamoto Akihiko、Takemoto Shinya、Yasui Takahiro、Hiwatashi Akio
    • Journal Title

      Scientific Reports

      Volume: 14 Issue: 1 Pages: 113-113

    • DOI

      10.1038/s41598-023-50434-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dosimetric and radiobiological analyses of a de-escalation strategy for elective nodal regions in human papillomavirus-associated oropharyngeal cancer2023

    • Author(s)
      Tomita Natsuo、Hayashi Naoki、Mizuno Tomoki、Kitagawa Yuto、Yasui Keisuke、Saito Yasunori、Sudo Shuo、Takano Seiya、Kita Nozomi、Torii Akira、Niwa Masanari、Okazaki Dai、Takaoka Taiki、Kawakita Daisuke、Iwasaki Shinichi、Hiwatashi Akio
    • Journal Title

      Technical Innovations & Patient Support in Radiation Oncology

      Volume: 28 Pages: 100221-100221

    • DOI

      10.1016/j.tipsro.2023.100221

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Symptomatic radiation-induced rib fractures after stereotactic body radiotherapy for early-stage non-small cell lung cancer2023

    • Author(s)
      Kita Nozomi、Tomita Natsuo、Takaoka Taiki、Matsuura Akane、Okazaki Dai、Niwa Masanari、Torii Akira、Takano Seiya、Mekata Yuji、Niimi Akio、Hiwatashi Akio
    • Journal Title

      Clinical and Translational Radiation Oncology

      Volume: 43 Pages: 100683-100683

    • DOI

      10.1016/j.ctro.2023.100683

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Importance of the Number and Location of Lymph Node Metastasis in Oropharyngeal Cancer.2023

    • Author(s)
      Iida M, Murai T, Kuno M, Osumi K, Nakanishi-Imai M, Okazaki D, Murase T, Kawakita D, Iwasaki S, Inagaki H, Tomita N, Shibamoto Y, Hiwatashi A.
    • Journal Title

      In Vivo. 2023 Sep-Oct;37(5):2210-2218.

      Volume: 37 Issue: 5 Pages: 2210-2218

    • DOI

      10.21873/invivo.13321

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clinical Outcomes of Radiation Therapy for Angiosarcoma of the Scalp and Face: A Multi-Institutional Observational Study2023

    • Author(s)
      Niwa Masanari、Tomita Natsuo、Takaoka Taiki、Takano Hirota、Makita Chiyoko、Matsuo Masayuki、Adachi Sou、Oshima Yukihiko、Yamamoto Shintaro、Kuno Mayu、Miyakawa Akifumi、Okazaki Dai、Torii Akira、Kita Nozomi、Takano Seiya、Nakamura Motoki、Kato Hiroshi、Morita Akimichi、Hiwatashi Akio
    • Journal Title

      Cancers

      Volume: 15 Issue: 14 Pages: 3696-3696

    • DOI

      10.3390/cancers15143696

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Intensity-modulated radiation therapy with the central shielding technique for patients with uterine cervical cancer2023

    • Author(s)
      Torii Akira、Tomita Natsuo、Kuno Mayu、Nishio Masahiro、Yamada Yuki、Takaoka Taiki、Okazaki Dai、Niwa Masanari、Kita Nozomi、Takano Seiya、Murao Takayuki、Ogawa Yasutaka、Hiwatashi Akio
    • Journal Title

      Journal of Radiation Research

      Volume: 64 Issue: 4 Pages: 720-727

    • DOI

      10.1093/jrr/rrad039

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clinical and dosimetric factors for symptomatic radiation pneumonitis after stereotactic body radiotherapy for early-stage non-small cell lung cancer2023

    • Author(s)
      Kita Nozomi、Tomita Natsuo、Takaoka Taiki、Okazaki Dai、Niwa Masanari、Torii Akira、Takano Seiya、Mekata Yuji、Niimi Akio、Hiwatashi Akio
    • Journal Title

      Clinical and Translational Radiation Oncology

      Volume: 41 Pages: 100648-100648

    • DOI

      10.1016/j.ctro.2023.100648

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Acute genitourinary toxicity of pencil beam scanning proton therapy for localized prostate cancer: utility of the transition zone index and average urinary flow rate in predicting acute urinary retention2023

    • Author(s)
      Takaoka Taiki、Yanagi Takeshi、Tanaka Atsushi、Kiriyama Yuka、Tanaka Yoshihiro、Kondo Takuhito、Takano Seiya、Takahashi Shinsei、Shibamoto Yuta、Tomita Natsuo、Hiwatashi Akio
    • Journal Title

      Japanese Journal of Clinical Oncology

      Volume: 53 Issue: 5 Pages: 419-428

    • DOI

      10.1093/jjco/hyad005

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Comparison of Recurrence Patterns between Adenocarcinoma and Squamous Cell Carcinoma after Stereotactic Body Radiotherapy for Early-Stage Lung Cancer2023

    • Author(s)
      Kita Nozomi、Tomita Natsuo、Takaoka Taiki、Sudo Shuou、Tsuzuki Yusuke、Okazaki Dai、Niwa Masanari、Torii Akira、Takano Seiya、Niimi Akio、Hiwatashi Akio
    • Journal Title

      Cancers

      Volume: 15 Issue: 3 Pages: 887-887

    • DOI

      10.3390/cancers15030887

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clinical Outcomes of Radiation Therapy for Choroidal Metastases and A Literature Review2022

    • Author(s)
      NIWA MASANARI、TOMITA NATSUO、MIYAKAWA AKIFUMI、AYAKAWA SHIHO、TAKAMA NATSUKO、TORII AKIRA、KITA NOZOMI、ISHIKURA SATOSHI、SHIBAMOTO YUTA
    • Journal Title

      The Kurume Medical Journal

      Volume: 69 Issue: 1.2 Pages: 89-97

    • DOI

      10.2739/kurumemedj.MS69120012

    • ISSN
      0023-5679, 1881-2090
    • Year and Date
      2022-06-30
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Radiotherapy for ductal carcinoma of the prostate: an analysis based on the Japanese radiation oncology study group survey2022

    • Author(s)
      Kawamura Hidemasa、Nakamura Katsumasa、Yoshioka Yasuo、et al.
    • Journal Title

      Japanese Journal of Clinical Oncology

      Volume: 53 Issue: 2 Pages: 146-152

    • DOI

      10.1093/jjco/hyac180

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Daily irradiation versus irradiation at two- to three-day intervals in stereotactic radiotherapy for patients with 1-5 brain metastases: study protocol for a multicenter open-label randomized phase II trial2022

    • Author(s)
      Tomita Natsuo、Ishiyama Hiromichi、Makita Chiyoko、et al.
    • Journal Title

      BMC Cancer

      Volume: 22 Issue: 1 Pages: 1259-1259

    • DOI

      10.1186/s12885-022-10371-3

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] International consensus on radiotherapy in metastatic non-small cell lung cancer2022

    • Author(s)
      Zhu Zhengfei、Ni Jianjiao、Cai Xuwei、et al.
    • Journal Title

      Translational Lung Cancer Research

      Volume: 11 Issue: 9 Pages: 1763-1795

    • DOI

      10.21037/tlcr-22-644

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparison of intensity-modulated radiotherapy with the 5-field technique, helical tomotherapy and volumetric modulated arc therapy for localized prostate cancer2022

    • Author(s)
      Kita Nozomi、Shibamoto Yuta、Takemoto Shinya、Manabe Yoshihiko、Yanagi Takeshi、Sugie Chikao、Tomita Natsuo、Iwata Hiromitsu、Murai Taro、Hashimoto Shingo、Ishikura Satoshi
    • Journal Title

      Journal of Radiation Research

      Volume: 63 Issue: 4 Pages: 666-674

    • DOI

      10.1093/jrr/rrac027

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of stereotactic body radiotherapy for early‐stage non‐small‐cell lung cancer in patients borderline for surgery due to impaired pulmonary function2022

    • Author(s)
      Tomita Natsuo、Okuda Katsuhiro、Kita Nozomi、Niwa Masanari、Hashimoto Shingo、Murai Taro、Ishikura Satoshi、Nakanishi Ryoichi、Shibamoto Yuta
    • Journal Title

      Asia-Pacific Journal of Clinical Oncology

      Volume: In press Issue: 6 Pages: 634-641

    • DOI

      10.1111/ajco.13731

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Radiotherapy for a rare phosphaturic mesenchymal tumor in the middle ear presenting with oncogenic osteomalacia2021

    • Author(s)
      Takaoka Taiki、Tomita Natsuo、Shido Yoji、Baba Satoshi、Fukushima Mayu、Sugie Chikao、Shibamoto Yuta
    • Journal Title

      Medicine

      Volume: 100 Issue: 38 Pages: e27284-e27284

    • DOI

      10.1097/md.0000000000027284

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Marked Improvement of Anti-TIF1-γ Antibody-Positive Dermatomyositis After Chemoradiotherapy to Relevant Nasopharyngeal Cancer2021

    • Author(s)
      Tomita Natsuo、Tamechika Shin-Ya、Kawakita Daisuke、Saito Kenta
    • Journal Title

      Advances in Radiation Oncology

      Volume: 6 Issue: 4 Pages: 100695-100695

    • DOI

      10.1016/j.adro.2021.100695

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Surgery versus stereotactic body radiotherapy for clinical stage I non-small-cell lung cancer: propensity score-matching analysis including the ratio of ground glass nodules2021

    • Author(s)
      Tomita N.、Okuda K.、Osaga S.、Miyakawa A.、Nakanishi R.、Shibamoto Y.
    • Journal Title

      Clinical and Translational Oncology

      Volume: 23 Issue: 3 Pages: 638-647

    • DOI

      10.1007/s12094-020-02459-8

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dosimetric Comparison of Helical Tomotherapy and Intensity-Modulated Proton Therapy in Hippocampus- and Scalp-Sparing Whole Brain Radiotherapy2021

    • Author(s)
      Takaoka Taiki、Tomita Natsuo、Mizuno Tomoki、Hashimoto Shingo、Tsuchiya Takahiro、Tomida Masashi、Yanagi Takeshi
    • Journal Title

      Technology in Cancer Research & Treatment

      Volume: 20

    • DOI

      10.1177/15330338211060170

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dosimetric Comparison of Helical Tomotherapy, Volumetric-Modulated Arc Therapy, and Intensity-Modulated Proton Therapy for Angiosarcoma of the Scalp2021

    • Author(s)
      Mizuno Tomoki、Tomita Natsuo、Takaoka Taiki、Tomida Masashi、Fukuma Hiroshi、Tsuchiya Takahiro、Shibamoto Yuta
    • Journal Title

      Technology in Cancer Research & Treatment

      Volume: 20

    • DOI

      10.1177/1533033820985866

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Abscopal Effect of Pelvic Intensity Modulated Radiation Therapy on Lung Metastases in a Patient With Recurrent Endometrial Cancer2021

    • Author(s)
      Tomita Natsuo、Ogawa Shino、Aikawa Gosuke
    • Journal Title

      Advances in Radiation Oncology

      Volume: 6 Issue: 1 Pages: 100563-100563

    • DOI

      10.1016/j.adro.2020.09.003

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Relationship between radiation doses to heart substructures and radiation pneumonitis in patients with thymic epithelial tumors2020

    • Author(s)
      Tomita Natsuo、Okuda Katsuhiro、Ogawa Yasutaka、Iida Masato、Eguchi Yuta、Kitagawa Yuto、Uchiyama Kaoru、Takaoka Taiki、Nakanishi Ryoichi、Shibamoto Yuta
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 11191-11191

    • DOI

      10.1038/s41598-020-68168-y

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact of advanced radiotherapy techniques and dose intensification on toxicity of salvage radiotherapy after radical prostatectomy2020

    • Author(s)
      Tomita Natsuo、Uchiyama Kaoru、Mizuno Tomoki、Imai Mikiko、Sugie Chikao、Ayakawa Shiho、Niwa Masanari、Matsui Tooru、Otsuka Shinya、Manabe Yoshihiko、Nomura Kento、Kondo Takuhito、Kosaki Katsura、Miyakawa Akifumi、Miyamoto Akihiko、Takemoto Shinya、Kitagawa Yuto、Yasui Takahiro、Shibamoto Yuta
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 114-114

    • DOI

      10.1038/s41598-019-57056-9

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact of treatment planning using a structure block function on the target and organ doses related to patient movement in cervical esophageal cancer: A phantom study2019

    • Author(s)
      Shimizu Hidetoshi、Sasaki Koji、Ito Makoto、Aoyama Takahiro、Tachibana Hiroyuki、Tomita Natsuo、Makita Chiyoko、Tanaka Hiroshi、Koide Yutaro、Iwata Tohru、Kodaira Takeshi
    • Journal Title

      Journal of Applied Clinical Medical Physics

      Volume: 20 Issue: 5 Pages: 75-83

    • DOI

      10.1002/acm2.12582

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Retrospective analysis of hypofractionated stereotactic radiotherapy for tumors larger than 2 cm2019

    • Author(s)
      Koide Y, Tomita N, Adachi S, Tanaka H, Tachibana H, Kodaira T.
    • Journal Title

      Nagoya Journal of Medical Science

      Volume: 81 Issue: 3 Pages: 397-406

    • DOI

      10.18999/nagjms.81.3.397

    • NAID

      120006716066

    • ISSN
      2186-3326
    • URL

      https://nagoya.repo.nii.ac.jp/records/28455

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 転移性脳腫瘍に対する定位照射の連日照射法と間隔を空けた照射法のランダム化比較2023

    • Author(s)
      富田夏夫 鳥居暁 高岡大樹ら
    • Organizer
      日本放射線腫瘍学会第36回学術大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 34.Relationship Between Radiation Dose to Heart Substructures and Radiation Pneumonitis in Patients with Thymoma or Thymic Carcinoma2020

    • Author(s)
      M. Iida, N. Tomita, K. Okuda, Y. Ogawa, T. Takaoka, Y. Shibamoto.
    • Organizer
      米国放射線腫瘍学会
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Stereotactic Body Radiotherapy Versus Surgery for Patients with Stage I Non-Small-Cell Lung Cancer: Comparison of Long-Term Outcome with a Propensity Score Matching Analysis2019

    • Author(s)
      Natsuo Tomita
    • Organizer
      ASTRO Annual Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 傾向スコアによるI期肺癌の手術と定位照射の成績比較:GGOを交絡因子に 加える影響2019

    • Author(s)
      富田夏夫
    • Organizer
      日本放射線腫瘍学会 第32回学術大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 傾向スコアによるI期肺癌の手術と定位照射の成績比較:GGOを交絡因子に 加える影響2019

    • Author(s)
      富田夏夫
    • Organizer
      日本医学放射線学会第166回中部地方会
    • Related Report
      2019 Research-status Report
  • [Presentation] Impact of Early Salvage Radiotherapy in Patients with Biochemical Recurrence after Radical Prostatectomy: Results of a Multi-institutional Retrospective Stud2019

    • Author(s)
      Tomoki Mizuno, Natsuo Tomita
    • Organizer
      ASTRO Annual Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2025-01-30  

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