• Title/Summary/Keyword: Kyoto school

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RUNX1-Survivin Axis Is a Novel Therapeutic Target for Malignant Rhabdoid Tumors

  • Masamitsu, Mikami;Tatsuya, Masuda;Takuya, Kanatani;Mina, Noura;Katsutsugu, Umeda;Hidefumi, Hiramatsu;Hirohito, Kubota;Tomoo, Daifu;Atsushi, Iwai;Etsuko Yamamoto, Hattori;Kana, Furuichi;Saho, Takasaki;Sunao, Tanaka;Yasuzumi, Matsui;Hidemasa, Matsuo;Masahiro, Hirata;Tatsuki R., Kataoka;Tatsutoshi, Nakahata;Yasumichi, Kuwahara;Tomoko, Iehara;Hajime, Hosoi;Yoichi, Imai;Junko, Takita;Hiroshi, Sugiyama;Souichi, Adachi;Yasuhiko, Kamikubo
    • Molecules and Cells
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    • v.45 no.12
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    • pp.886-895
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    • 2022
  • Malignant rhabdoid tumor (MRT) is a highly aggressive pediatric malignancy with no effective therapy. Therefore, it is necessary to identify a target for the development of novel molecule-targeting therapeutic agents. In this study, we report the importance of the runt-related transcription factor 1 (RUNX1) and RUNX1-Baculoviral IAP (inhibitor of apoptosis) Repeat-Containing 5 (BIRC5/survivin) axis in the proliferation of MRT cells, as it can be used as an ideal target for anti-tumor strategies. The mechanism of this reaction can be explained by the interaction of RUNX1 with the RUNX1-binding DNA sequence located in the survivin promoter and its positive regulation. Specific knockdown of RUNX1 led to decreased expression of survivin, which subsequently suppressed the proliferation of MRT cells in vitro and in vivo. We also found that our novel RUNX inhibitor, Chb-M, which switches off RUNX1 using alkylating agent-conjugated pyrrole-imidazole polyamides designed to specifically bind to consensus RUNX-binding sequences (5'-TGTGGT-3'), inhibited survivin expression in vivo. Taken together, we identified a novel interaction between RUNX1 and survivin in MRT. Therefore the negative regulation of RUNX1 activity may be a novel strategy for MRT treatment.

Genetic Quality Control of the Rat Strains at the National Bio Resource Project-Rat

  • Kuramoto, Takashi;Nakanishi, Satoshi;Yamasaki, Ken-ichi;Kumafuji, Kenta;Sakakibara, Yuichi;Neoda, Yuki;Takizawa, Akiko;Kaneko, Takehito;Otsuki, Mito;Hashimoto, Ryoko;Voigt, Birger;Mashimo, Tomoji;Serikawa, Tadao
    • Interdisciplinary Bio Central
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    • v.2 no.4
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    • pp.12.1-12.7
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    • 2010
  • The National Bio Resource Project-Rat (NBRP-Rat) comprises the largest bank of laboratory rat (Rattus norvegicus) strains in the world. Its main focus is to develop infrastructure that will facilitate the systematic collection, preservation, and provision of rat strains. To breed effectively more than 180 rat strains in living stock, we establish the genetic control system in which a systematic set of genetic diagnoses and genetic monitoring are included. Genetic monitoring is performed by using 20 polymorphic markers. Monitoring is carried out when a living animal stock is re-established by using cryopreserved embryos or sperm or when a rat strain is first introduced to the NBRP-Rat by a depositor. Additional monitoring is then carried out on each strain every two years. Genetic diagnosis is performed largely by employing the Amp-FTA method. Protocols which detail how to perform a genetic diagnosis of 11 transgenes and 24 mutations have been made. Among the mutations, nine can be detected by simple gel electrophoresis of the PCR products, 11 by restriction enzyme treatment of the PCR products, and four by direct PCR product sequencing. Using this genetic control system, the NBRP-Rat can guarantee the genetic quality of its rat strains.

Photopatch Tests of recent three years at Kyoto University Hospital

  • Katoh, Mayumi;Kitoh, Akihiko;Otoshi, Eriko;Arima, Yaeno;Nishigori, Chikako;Miyachi, Yoshiki
    • Journal of Photoscience
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    • v.9 no.2
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    • pp.497-499
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    • 2002
  • We experienced 29 cases of tentative photo allergic disorders from April 2000 to March 2002. For those 29 patients, photopatch tests have been done to explore possible causative photoallergens. We performed photopatch tests with photo-related allergens and possible causative products that the patients brought to us. After applications for 48hrs, one test site was irradiated with half of MRD or 6.0 J/cm$^2$ of UVA. Readings were evaluated according to the reading criteria of the ICDRG. Photoallergens were suggested in 20 cases (69.0%). Among them, we could find out the causative products in 7 cases (24.1%). Photopatch tests, performed by an appropriate method, are useful in some cases not only for diagnosis of photocontact dermatitis but also diagnosis of systemic photoallergic disorders.

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Chloroplastic NAD(P)H Dehydrogenase Complex and Cyclic Electron Transport around Photosystem I

  • Endo, Tsuyoshi;Ishida, Satoshi;Ishikawa, Noriko;Sato, Fumihiko
    • Molecules and Cells
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    • v.25 no.2
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    • pp.158-162
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    • 2008
  • Recent molecular genetics studies have revealed that cyclic electron transport around photosystem I is essential for normal photosynthesis and growth of plants. Chloroplastic NAD(P)H dehydorgenase (NDH) complex, a homologue of the complex I in respiratory electron transport, is involved in one of two cyclic pathways. Recent studies on the function and structure of the NDH complex are reviewed.