Education 【 display / non-display 】

Education 【 display / non-display 】

• 2015

  -

  2020

  Sapporo Medical University   医学部   大学院医学研究科  

• 2004

  -

  2010

  Sapporo Medical University   医学部   医学科  

Degree 【 display / non-display 】

Degree 【 display / non-display 】

• 2020.09   Sapporo Medical University   PhD

Research Experience 【 display / non-display 】

Research Experience 【 display / non-display 】

• 2022.09

  -

  Now

  Sapporo Medical University   放射線医学講座   助教

• 2019.04

  -

  2022.08

  KKR札幌医療センター   放射線科  

• 2013.04

  -

  2019.03

  札幌医科大学附属病院   放射線治療科   診療医、研究員

• 2011.04

  -

  2012.03

  札幌医科大学附属病院   初期臨床研修医

• 2011.04

  -

  2012.03

  帯広厚生病院   初期臨床研修医

Research Areas 【 display / non-display 】

Research Areas 【 display / non-display 】

• Life sciences   Radiology   放射線腫瘍学

Affiliation 【 display / non-display 】

Affiliation 【 display / non-display 】

• Sapporo Medical University   放射線医学講座   助教  

Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Analysis of Treatment Response With Proteins Related to Tumor Immunity in Postoperative Irradiated Cervical Cancer Patients.

  Shoh Mafune, Masanori Someya, Tomokazu Hasegawa, Takaaki Tsuchiya, Mio Kitagawa, Toshio Gocho, Ryu Okuda, Masahiro Iwasaki, Motoki Matsuura, Terufumi Kubo, Yoshihiko Hirohashi, Toshihiko Torigoe, Tsuyoshi Saito, Koh-Ichi Sakata

  Anticancer research   44 ( 7 ) 3077 - 3086  2024.07  [International journal]

  　View Summary

  BACKGROUND/AIM: This study evaluated the association between programmed cell death-ligand 1 (PD-L1) and prognosis in patients with cervical cancer treated with postoperative radiation and the impact of neoadjuvant chemotherapy (NAC) on this association. PATIENTS AND METHODS: Immunohistochemical analysis was performed on biopsy specimens from 42 patients who did not receive NAC and from paired samples before (biopsies) and after (resected tissues) chemotherapy from 46 patients who received NAC to determine the association of PD-L1 with radiotherapy outcomes. RESULTS: In the non-NAC group, patients with ≥10% PD-L1-expressing tumor cells prior to treatment had better recurrence-free survival (RFS) than those with <10% PD-L1-expressing tumor cells (p=0.001). In the NAC group, RFS was significantly lower (p=0.005) in the group with a ≥5% reduction of PD-L1 expression in tumor cells after chemotherapy than in those with <5% reduction. In multivariate analysis, only PD-L1 expression (non-NAC group) and the change in PD-L1 expression (NAC group) were associated with RFS. CONCLUSION: Low PD-L1 expression in a cervical tumor prior to treatment was identified as a risk factor for a poor outcome after postoperative radiotherapy. Furthermore, NAC induces an immunological shift that reduces PD-L1 levels in tumor cells, thereby negatively impacting treatment outcomes.

  DOI PubMed

• Prediction of Treatment Response Based on Nutritional Status and Tumor Immunity in Oropharyngeal Cancer Patients Treated With Chemoradiotherapy.

  Mio Kitagawa, Juno Kaguchi, Masanori Someya, Yuki Fukushima, Tomokazu Hasegawa, Takaaki Tsuchiya, Toshio Gocho, Shoh Mafune, Yutaro Ikeuchi, Ryu Okuda, Atsuya Ohguro, Ryo Kamiyama, Ayato Ashina, Yuka Toshima, Yoshihiko Hirohashi, Toshihiko Torigoe, Koh-Ichi Sakata

  Cancer diagnosis & prognosis   4 ( 6 ) 789 - 796  2024  [International journal]

  　View Summary

  BACKGROUND/AIM: Radiotherapy (RT) for advanced oropharyngeal cancer (OPC) is effective, especially when combined with chemotherapy (CRT). However, its success can vary depending on factors, such as tumor stage, HPV infection (p16 status), and the patient's nutritional and immune status. This study examined the controlling nutritional status (CONUT) score and tumor immunity as predictive factors for treatment outcomes in OPC, aiming to develop a personalized risk score. PATIENTS AND METHODS: A retrospective analysis was conducted on 84 patients with OPC treated with definitive RT or CRT, and survival outcomes were compared based on various factors, including BMI, CONUT score, CD8 expression, and HLA class II expression. RESULTS: We observed better overall survival (OS) rates in CD8-positive patients and those with higher HLA class II expression. The univariate analysis identified stage, p16 status, BMI, CONUT score, and CD8 expression as significantly associated with OS. In multivariate analysis, stage, BMI, and CONUT score remained significant predictors of OS. A risk scoring system was developed based on stage, p16 status, BMI, CONUT score, and CD8 expression. Patients were categorized into low-risk and high-risk groups, with significantly better survival in the low-risk group. CONCLUSION: A combined risk score incorporating clinical, nutritional, and immune factors can improve the prediction of treatment outcomes for OPC patients. This risk stratification may enable personalized treatment plans and improve ΟS rates.

  DOI PubMed

• Identification and Quantification of Radiotherapy-related Protein Expression in Cancer Tissues Using the Qupath Software and Prediction of Treatment Response.

  Tomokazu Hasegawa, Masanori Someya, Takaaki Tsuchiya, Mio Kitagawa, Yuki Fukushima, Toshio Gocho, Shoh Mafune, Ryuu Okuda, Juno Kaguchi, Atsuya Ohguro, Ryo Kamiyama, Ayato Ashina, Yuka Toshima, Yoshihiko Hirohashi, Toshihiko Torigoe, Koh-Ichi Sakata

  In vivo (Athens, Greece)   38 ( 3 ) 1470 - 1476  2024  [International journal]

  　View Summary

  BACKGROUND/AIM: Automated measurement of immunostained samples can enable more convenient and objective prediction of treatment outcome from radiotherapy. We aimed to validate the performance of the QuPath image analysis software in immune cell markers detection by comparing QuPath cell counting results with those of physician manual cell counting. PATIENTS AND METHODS: CD8- and FoxP3-stained cervical, CD8-stained oropharyngeal, and Ku70-stained prostate cancer tumor sections were analyzed in 104 cervical, 92 oropharyngeal, and 58 prostate cancer patients undergoing radiotherapy at our Institution. RESULTS: QuPath and manual counts were highly correlated. When divided into two groups using ROC curves, the agreement between QuPath and manual counts was 89.4% for CD8 and 88.5% for FoxP3 in cervical cancer, 87.0% for CD8 in oropharyngeal cancer and 80.7% for Ku70 in prostate cancer. In cervical cancer, the high CD8 group based on QuPath counts had a better prognosis and the low CD8 group had a significantly worse prognosis [p=0.0003; 5-year overall survival (OS), 65.9% vs. 34.7%]. QuPath counts were more predictive than manual counts. Similar results were observed for FoxP3 in cervical cancer (p=0.002; 5-year OS, 62.1% vs. 33.6%) and CD8 in oropharyngeal cancer (p=0.013; 5-year OS, 80.2% vs. 47.2%). In prostate cancer, high Ku70 group had worse and low group significantly better outcome [p=0.007; 10-year progression-free survival (PFS), 56.0% vs. 93.8%]. CONCLUSION: QuPath showed a strong correlation with manual counting, confirming its utility and accuracy and potential applicability in clinical practice.

  DOI PubMed

• Prediction of late adverse events in pelvic cancer patients receiving definitive radiotherapy using radiation-induced gamma-H2AX foci assay.

  Masanori Someya, Tomokazu Hasegawa, Asako J Nakamura, Takaaki Tsuchiya, Mio Kitagawa, Toshio Gocho, Sho Mafune, Yutaro Ikeuchi, Hiroshi Tauchi, Koh-Ichi Sakata

  Journal of radiation research   64 ( 6 ) 948 - 953  2023.11  [International journal]

  　View Summary

  Radiation can induce DNA double-stranded breaks, which are typically detected by the fluorescence of phosphorylated histone H2AX. In this study, we examined the usefulness of the dynamics of radiation-induced gamma-H2AX foci of peripheral blood lymphocytes (PBLs), as a marker of DNA repair ability, in predicting late adverse events from radiotherapy. A total of 46 patients with cervical, vaginal and anal canal cancers treated with radical radiotherapy between 2014 and 2019 were included in this analysis. Concurrent chemotherapy was administered in 36 cases (78.3%). Peripheral blood was obtained before treatment, and then irradiated ex vivo with 1 Gy X-ray. The ratio of radiation-induced gamma-H2AX foci in PBLs measured at 30 min and at 4 h was defined as the foci decay ratio (FDR). With a median follow-up of 54 months, 9 patients (19.6%) were observed to have late genitourinary or gastrointestinal (GU/GI) toxicity. The FDR ranged from 0.51 to 0.74 (median 0.59), with a significantly higher incidence of Grade 1 or higher late adverse events in the FDR ≥ 0.59 group. In multivariate analysis, FDR ≥ 0.59 and hypertension also emerged as significant factors associated with the development of late toxicities. Overall, our results suggest that measurement of radiation-induced gamma-H2AX foci in PBLs may predict the risk of late GU/GI toxicities from chemoradiotherapy, which can enable tailoring the radiation dose to minimize adverse effects.

  DOI PubMed

• 放射線感受性の個人差に基づく次世代の放射線治療と放射線防護 腫瘍および正常組織の放射線感受性予測に基づいた個別化放射線治療の実践(Personalized radiotherapy based on the prediction of radiosensitivity of tumors and normal tissues)

  Someya Masanori, Hasegawa Tomokazu, Tsuchiya Takaaki, Kitagawa Mio, Gocho Toshio, Mafune Shoh, Sakata Koh-ichi

  日本放射線影響学会大会講演要旨集 ( (一社)日本放射線影響学会 )  66回   12 - 12  2023.11

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Misc 【 display / non-display 】

Misc 【 display / non-display 】

• 化学放射線療法+免疫療法を行った3期切除不能非小細胞肺癌における,末梢血リンパ細胞のTCRレパトア解析

  染谷正則, 長谷川智一, 北川未央, 土屋高旭, 眞船翔, 後町俊夫, 池内佑太郎, 金関貴幸, 鳥越俊彦, 坂田耕一

  日本免疫治療学会学術集会プログラム・抄録集   20th  2023

  J-GLOBAL

• 血中エクソソームmiRNAを用いた子宮頸癌の治療効果予測

  染谷正則, 土屋高旭, 福島悠希, 池内佑太郎, 眞船翔, 小塚陽, 北川未央, 後町俊夫, 坂田耕一

  日本免疫治療学会学術集会プログラム・抄録集   19th  2022

  J-GLOBAL

• 子宮頸癌根治照射症例におけるCD8の浸潤形式と予後との関連

  染谷 正則, 土屋 高旭, 福島 悠希, 長谷川 智一, 北川 未央, 後町 俊夫, 岩崎 雅宏, 松浦 基樹, 齋藤 豪, 坂田 耕一

  日本癌治療学会学術集会抄録集 ( (一社)日本癌治療学会 )  59回   O37 - 7  2021.10

• 根治放射線療を行った進行期子宮頸癌症例における腫瘍免疫と予後の関連

  染谷 正則, 土屋 高旭, 福島 悠希, 長谷川 智一, 高田 優, 中田 健生, 堀 正和, 三浦 勝利, 北川 未央, 後町 俊夫, 岩崎 雅宏, 松浦 基樹, 齋藤 豪, 坂田 耕一

  日本癌治療学会学術集会抄録集 ( (一社)日本癌治療学会 )  58回   O16 - 4  2020.10

• 当院における肺癌に対する体幹部定位放射線治療の治療成績

  征矢野 崇, 松本 健一, 後町 俊夫, 福島 悠希, 土屋 高旭, 北川 未央, 堀 正和, 中田 健生, 染谷 正則, 坂田 耕一

  Japanese Journal of Radiology ( (公社)日本医学放射線学会 )  36 ( Suppl. ) 8 - 8  2018.02

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Research Projects 【 display / non-display 】

Research Projects 【 display / non-display 】

• Practical application of individualized radiotherapy using liquid biopsy

  Grant-in-Aid for Scientific Research (C)

  Project Year :

  2021.04

  -

  2024.03

   

  染谷 正則, 池内 佑太郎, 小塚 陽, 後町 俊夫

  　View Summary

  ＜目的＞治療効果向上と有害事象軽減を目指した「個別化放射線治療」を実践するために、局所進行悪性腫瘍に対し、末梢リンパ球や血中の腫瘍由来エクソソームに存在する、mRNAやmiRNAの発現パターンを調べ、放射線治療効果を予測する。またDNA修復能の指標として末梢リンパ球の放射線誘発ガンマH2AXフォーカスを測定する事で有害事象を予測する。これらの手法を用いて個々の患者毎の特性に合わせて線量分割や照射体積を調整する。 ＜方法＞以下に示す方法で、末梢血リンパ細胞およびエクソソーム内のmRNA/miRNA発現パターンや末梢血リンパ細胞の放射線誘発ガンマH2AXフォーカス形成能を測定した。 (A) 血漿中からのエクソソームの抽出とRNA分離・発現解析は、QIAGEN社のexoRNeasy plasma kitを用いた。バイオアナライザーを用いてRNA濃度と目的となる２０‐２５塩基配列程度のmiRNAが取れている事を確認した。QIAseq miRNA Library Kitを用いてRNA解析を行なった。これまで子宮頸がん36例からのエクソソーム抽出を行い、再発リスクとなる候補miRNAを抽出する。 (B) 末梢血リンパ細胞の放射線誘発ガンマH2AXフォーカス計測は、ex vivoでX線を１Gy照射し、３０分後および４時間後にリンパ球を分離・固定を行い、スライドグラス上で蛍光免疫染色を行い、蛍光顕微鏡下にフォーカス数をカウントし、その変化率を計算してDNA修復能力を数値化する。

• Application of Liquid Biopsy for Personalized Radiation Therapy

  Grant-in-Aid for Scientific Research (C)

  Project Year :

  2018.04

  -

  2021.03

   

  Someya Masanori

  　View Summary

  In order to realize "personalized radiotherapy", we used a technique called "liquid biopsy" to examine the nucleic acids and proteins of tumor-derived exosomes in plasma, and applied it to the prediction of radiosensitivity of cancer. Blood samples were collected from a total of 150 patients with cervical, rectal, anal and pancreatic cancers treated with abdominal to pelvic radiotherapy, and plasma and lymphocyte samples were isolated. DNA-PK activity of lymphocytes and radiation-induced gamma H2AX focus was measured, and exosomal microRNA expression analysis in plasma was performed. Based on the results of the treatment outcome and adverse event surveys for each cancer and the results of lymphocyte DNA-PK activity and radiation-induced gamma-H2AX focus measurements, we showed that exosomal microRNAs in plasma are useful for predicting the effects of radiotherapy and that lymphocyte DNA-PK activity may be useful for predicting late adverse events after radiotherapy.

• Prediction of local tumor control and acute radiation toxicity in pelvic cancer patients using lymphocyte biomarker.

  Grant-in-Aid for Scientific Research (C)

  Project Year :

  2015.04

  -

  2018.03

   

  Someya Masanori

  　View Summary

  To predict individual treatment effects and acute toxicity of patients who underwent pelvic radiation therapy, blood lymphocytes were collected from 141 patients who underwent definitive radiation therapy for non metastatic prostate cancer at our hospital, we measured the DNA-dependent protein kinase (DNA-PK) activity, which is considered to be involved in DNA damage repair, and the expression analysis of microRNA-410, 221 and 99a. As a result, we showed that the DNA-PK activity of lymphocytes was a significant predictor of biochemical relapse in prostate cancer patients and that a combination of miRNA-410 and 221 predicted acute gastrointestinal toxicities with higher accuracy than conventional dose-volume histogram analysis.