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Affiliation |
Hospital Central Laboratory Division |
Research Interests 【 display / non-display 】
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Cancer immunology
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Hematology
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Immunology
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Hematology
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Cancer immunology
Graduating School 【 display / non-display 】
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-2018.03
Akita University Graduate School, Division of Medicine Graduated
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-2010.03
Akita University Faculty of Medicine Graduated
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-2004.03
University of Tsukuba Second Cluster of College Graduated
Graduate School 【 display / non-display 】
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-2018.03
Akita University Graduate School, Division of Medicine Doctor's Course Completed
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-2006.03
University of Tsukuba Graduate School, Division of Medical Science Master's Course Completed
Campus Career 【 display / non-display 】
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2022.04-Now
Akita University Hospital Central Laboratory Division Assistant Professor
External Career 【 display / non-display 】
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2022.04
Akita University Hospital Central Laboratory Division Assistant Professor
Research Achievements 【 display / non-display 】
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Ponatinib Improved the Prognosis of Philadelphia Chromosome-Positive Acute Lymphoblastic Leukemia: A Japanese Single-Center Cohort Study.
Nagi Tozawa, Takaya Yamashita, Miho Nara, Yuki Fujioka, Sho Ikeda, Takahiro Kobayashi, Isuzu Kobayashi, Akihiro Kitadate, Yoshihiro Kameoka, Naoto Takahashi
Cureus 15 ( 12 ) e50416 2023.12
Research paper (journal)
Introduction The overall survival (OS) of Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ALL) has improved with the combination of tyrosine kinase inhibitor (TKI) with intensive chemotherapy. In recent years, there has been increased interest in the possibility of long-term survival without allogeneic hematopoietic stem cell transplantation (HSCT) or maintenance therapy. The aim of this study was to determine the effectiveness of treatment and the resultant outcomes in Ph+ALL patients using real-world data. Methods We performed a single-center retrospective analysis utilizing Akita University Hospital data (Akita, Japan) from November 2000 to June 2023 to evaluate the outcomes of TKI with intensive chemotherapy for Ph+ALL. Results Twenty-three patients with Ph+ALL were treated with intensive chemotherapy combined with TKI, including six imatinib, four dasatinib, and 13 ponatinib. The median patient age was 53 years (range; 28-67). Eighteen patients (78%) achieved complete molecular remission (CMR) within three months. HSCT was performed in 16 patients (70%), all of whom did not receive post-transplant TKI maintenance therapy. Six of the seven patients who did not undergo HSCT received maintenance therapy with ponatinib after intensive chemotherapy. The three-year OS was 81%. Ponatinib treatment resulted in a much higher OS rate than imatinib/dasatinib (100% vs. 60%; P=0.011). CMR within three months was identified as a prognostic factor for molecular relapse-free survival (hazard ratio (HR)=0.22; P=0.027). CD20 positivity was identified as a risk factor for hematological relapse (HR=5.2, P=0.032). Conclusion Even in a single-center cohort study, ponatinib, as a combination TKI with intensive chemotherapy or maintenance therapy, may improve the prognosis of Ph+ALL. Patients with CMR within three months might not necessarily need to receive HSCT, but a subsequent treatment-free status could have been achieved only by HSCT. Furthermore, CD20 positivity may be a useful biomarker for future treatment decisions in patients with Ph+ALL.
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Kazuaki Kameda, Ryo Yanagiya, Yuji Miyatake, Joaquim Carreras, Hiroshi Higuchi, Hiromichi Murayama, Takashi Ishida, Asahi Ito, Shinsuke Iida, Noriko Fukuhara, Hideo Harigae, Yuki Fujioka, Naoto Takahashi, Hidenori Wada, Fumihiro Ishida, Hideyuki Nakazawa, Rei Ishihara, Yuki Murakami, Hiroyuki Tagawa, Tadashi Matsuura, So Nakagawa, Sadahiro Iwabuchi, Shinichi Hashimoto, Ken-Ichi Imadome, Naoya Nakamura, Kenichi Ishizawa, Yoshinobu Kanda, Kiyoshi Ando, Ai Kotani
Blood ( Blood ) 142 ( 4 ) 352 - 364 2023.07 [Refereed]
Research paper (journal)
Aggressive natural killer cell leukemia (ANKL) is a rare lymphoid neoplasm frequently associated with Epstein-Barr virus, with a disastrously poor prognosis. Owing to the lack of samples from patients with ANKL and relevant murine models, comprehensive investigation of its pathogenesis including the tumor microenvironment (TME) has been hindered. Here we established three ANKL-patient-derived xenograft mice (PDXs), which enabled extensive analysis of tumor cells and their TME. ANKL cells primarily engrafted and proliferated in the hepatic sinusoid. Hepatic ANKL cells were characterized by an enriched Myc-pathway and proliferated faster than those in other organs. Interactome analyses and in vivo CRISPR-Cas9 analyses revealed transferrin (Tf)-transferrin receptor 1 (TfR1) axis as a potential molecular interaction between the liver and ANKL. ANKL cells were rather vulnerable to iron deprivation. PPMX-T003, a humanized anti-TfR1 monoclonal antibody, showed remarkable therapeutic efficacy in a preclinical setting using ANKL-PDXs. These findings indicate that the liver, a non-canonical hematopoietic organ in adults, serves as a principal niche for ANKL, and that inhibition of the Tf-TfR1 axis is a promising therapeutic strategy for ANKL.
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Nozaki K, Fujioka Y, Sugiyama D, Ishikawa J, Iida M, Shibata M, Kosugi S, Nishikawa H, Shibayama H.
International Journal of Hematology ( Springer Science and Business Media LLC ) 113 ( 5 ) 772 - 774 2021.05 [Refereed]
Research paper (journal)
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Fecal microbiota transplantation for patients with steroid-resistant acute graft-versus-host disease of the gut.
Kakihana K, Fujioka Y, Suda W, Najima Y, Kuwata G, Sasajima S, Mimura I, Morita H, Sugiyama D, Nishikawa H, Hattori M, Hino Y, Ikegawa S, Yamamoto K, Toya T, Doki N, Koizumi K, Honda K, Ohashi K.
Blood 2016.10 [Refereed]
Research paper (journal)
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Transcription factor Gata-3 is essential for lens development
Maeda A, Moriguchi T, Hamada M, Kusakabe M, Fujioka Y, Nakano T, Yoh K, Lim KC, Engel JD, Takahashi S.
Developmentl Dynamics 2009.09 [Refereed]
Research paper (journal)
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Endovascular Retrieval of a Fractured Tunneled Hemodialysis Central Venous Catheter Using the Loop Snare Technique.
Tomoko Sasaki, Yuki Fujioka, Haruka Hikichi, Daisuke Yokota, Shigeharu Ueki
Cureus 15 ( 2 ) e35617 2023.02
The tunneled cuffed hemodialysis catheter is a valuable vascular access option for patients with end-stage renal disease (ESRD). Healthcare providers have become more familiar with the insertion of medical devices, including central venous catheters, in their daily practice. The occurrence of foreign body fragmentation is rare with these catheters. This article presents a case in which a fracture of the distal portion of the hemodialysis catheter was inadvertently identified during a coronary angiography. Percutaneous removal of the fractured venous catheter was performed successfully using a loop snare catheter, which prevented the patient from experiencing further complications.
◆Original paper【 display / non-display 】
◆Other【 display / non-display 】
Presentations 【 display / non-display 】
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Kinetics of Treg after TKI discontinuation as a TFR biomarker
2023.10 - 2023.10
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Immune analyses of each TKI discontinuation trials leads the difference of immune induction ability
Yuki Fujioka, Naoto Takahashi, Hiroyoshi Nishikawa, Shigeki Ohtake, Yosuke Minami, Hitoshi Kiyoi, Yasushi Miyazaki, Itaru Matsumura
2022.10 - 2022.10