Updated on 2025/10/12

写真a

 
Tomonori Hirose
 
Organization
Graduate School of Medicine Department of Medicine Molecular Biology Lecturer
School of Medicine Medical Course
Title
Lecturer
Profile

大学院時代から一貫して、細胞極性制御因子PAR3やaPKCλ/ζの哺乳類における機能解析を進め、現在は神経幹細胞の増殖・分化バランスを調整する分子機構解明を進めています。

・PAR3-aPKC複合体が細胞極性制御において重要な機能を持つことを解明。
(培養上皮細胞を用いたPAR3の機能解析)
・PAR3による細胞極性制御を必要とする形態形成過程の具体例を確認。
(マウス心臓発生過程でPAR3による細胞極性制御の必要性を提示)
・腎疾患の病態に細胞極性異常が関わる可能性を提唱。
(腎糸球体ポドサイト特異的aPKCλノックアウトにより、巣状糸球体硬化症モデルマウスの樹立に成功)
・PAR3による神経幹細胞の増殖・分化バランスを調整する新しい分子機構を解明。
(終脳特異的PAR3ノックアウトマウスにより、神経分化開始時に神経幹細胞の増殖を制限するための分子機構を提示)

・共同研究:表皮幹細胞の維持・分化・癌化における細胞極性制御因子の機能解明。
(表皮特異的aPKCλノックアウトにより、aPKCλによる表皮幹細胞の休止期制御機構を提示表非特異的PAR3ノックアウトと化学発癌モデルを組み合わせ、組織型によるPAR3依存性の違いを提示。)
・共同研究:血管形成・動脈疾患病態における細胞極性制御因子の機能解明。
(内皮細胞特異的PAR3ノックアウトや動脈硬化症モデルとの組み合わせにより、PAR3によるVEGF受容体の動態制御機構や動脈硬化・炎症抑制機構を提示)

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Degree

  • 医学博士 ( 横浜市立大学 )

Research Interests

  • 疾患モデルマウス

  • 心外膜前駆細胞

  • ポドサイト

  • 腎臓病

  • 細胞分化

  • 非対称分裂

  • ノックアウトマウス

  • 細胞極性

  • 上皮細胞

  • 神経幹細胞

  • hedgehog signaling

  • primary cilia

  • 糸球体疾患

  • 包括脳ネットワーク

  • PAR6

  • シグナル伝達

  • ASIP

  • aPKC

  • ASPP2

  • PAR3

Research Areas

  • Life Science / Nephrology  / glomerular diseases

  • Life Science / Anatomy  / developmental biology

  • Life Science / Pathological biochemistry

  • Life Science / Developmental biology  / neural development

  • Life Science / Neuroscience-general  / neural stem cells

  • Life Science / Molecular biology  / signal transduction

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Professional Memberships

  • THE JAPANESE BIOCHEMICAL SOCIETY

    2015.7

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  • The Molecular Biology Society of Japan

    1997.4

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Committee Memberships

  • 横浜市立大学医学部医学科   医学教育分野別認証評価準備委員会  

    2015.4   

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Papers

  • PAR3 restricts the expansion of neural precursor cells by regulating hedgehog signaling. International journal

    Hirose T, Sugitani Y, Kurihara H, Kazama H, Kusaka C, Noda T, Takahashi H, Ohno S

    Development (Cambridge, England)   149 ( 21 )   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Company of Biologists  

    ABSTRACT

    During brain development, neural precursor cells (NPCs) expand initially, and then switch to generating stage-specific neurons while maintaining self-renewal ability. Because the NPC pool at the onset of neurogenesis crucially affects the final number of each type of neuron, tight regulation is necessary for the transitional timing from the expansion to the neurogenic phase in these cells. However, the molecular mechanisms underlying this transition are poorly understood. Here, we report that the telencephalon-specific loss of PAR3 before the start of neurogenesis leads to increased NPC proliferation at the expense of neurogenesis, resulting in disorganized tissue architecture. These NPCs demonstrate hyperactivation of hedgehog signaling in a smoothened-dependent manner, as well as defects in primary cilia. Furthermore, loss of PAR3 enhanced ligand-independent ciliary accumulation of smoothened and an inhibitor of smoothened ameliorated the hyperproliferation of NPCs in the telencephalon. Thus, these findings support the idea that PAR3 has a crucial role in the transition of NPCs from the expansion phase to the neurogenic phase by restricting hedgehog signaling through the establishment of ciliary integrity.

    DOI: 10.1242/dev.199931

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    Other Link: https://journals.biologists.com/dev/article-pdf/doi/10.1242/dev.199931/2232602/dev199931.pdf

  • The PAR3-aPKC-PAR6 complex Invited

    Shigeo Ohno, Spyros Goulas, Tomonori Hirose

    Cell Polarity 1: Biological Role and Basic Mechanisms   3 - 23   2015.1

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    Language:English   Publishing type:Part of collection (book)   Publisher:Springer International Publishing  

    DOI: 10.1007/978-3-319-14463-4_1

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  • An Essential Role of the Universal Polarity Protein, aPKC lambda, on the Maintenance of Podocyte Slit Diaphragms Reviewed

    Tomonori Hirose, Daisuke Satoh, Hidetake Kurihara, Chiho Kusaka, Hiroko Hirose, Kazunori Akimoto, Taiji Matsusaka, Iekuni Ichikawa, Tetsuo Noda, Shigeo Ohno

    PLOS ONE   4 ( 1 )   e4194   2009.1

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    DOI: 10.1371/journal.pone.0004194

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  • PAR3 is essential for cyst-mediated epicardial development by establishing apical cortical domains Reviewed

    T Hirose, M Karasawa, Y Sugitani, M Fujisawa, K Akimoto, S Ohnos, T Noda

    DEVELOPMENT   133 ( 7 )   1389 - 1398   2006.4

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    DOI: 10.1242/dev.02294

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  • Involvement of ASIP/PAR-3 in the promotion of epithelial tight junction formation Reviewed

    T Hirose, Y Izumi, Y Nagashima, Y Tamai-Nagai, H Kurihara, T Sakai, Y Suzuki, T Yamanaka, A Suzuki, K Mizuno, S Ohno

    JOURNAL OF CELL SCIENCE   115 ( 12 )   2485 - 2495   2002.6

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  • Biallelic TEDC1 variants cause a new syndrome with severe growth impairment and endocrine complications. International journal

    Noriko Miyake, Kentaro Shiga, Yuya Hasegawa, Chisato Iwabuchi, Kohei Shiroshita, Hiroshi Kobayashi, Keiyo Takubo, Fabien Velilla, Akiteru Maeno, Toshihiro Kawasaki, Yukiko Imai, Noriyoshi Sakai, Tomonori Hirose, Atsushi Fujita, Hidehisa Takahashi, Nobuhiko Okamoto, Mikako Enokizono, Shiho Iwasaki, Shuichi Ito, Naomichi Matsumoto

    European journal of human genetics : EJHG   2025.2

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    We encountered two affected male patients born to non-consanguineous parents, who presented with prenatal-onset severe growth impairment, primary microcephaly, developmental delay, adrenal insufficiency, congenital glaucoma, delayed bone aging, craniosynostosis, congenital tracheal stenosis, and primary hypogonadism. By exome sequencing, we identified compound heterozygous TEDC1 variants (NM_001134877.1 c.[104-5C>G];[787delG] p.[?];[(Ala263LeufsTer29)] in both affected siblings. We confirmed that the splice site variant, c.104-5C>G, leads to no TEDC1 protein production via nonsense-mediated mRNA decay. The frameshift variant located in the last coding exon, c.787delG, produces a C-terminally truncated protein, which impairs the binding with TEDC2. Thus, both variants are thought to be loss-of-function. TEDC1 and TEDC2 are both required for centriole stability and cell proliferation. Our in vitro experiments using patient-derived cells revealed cell cycle abnormality. Our in vivo study using tedc1-/- zebrafish generated by CRISPR/Cas9 successfully recapitulated the growth impairment and cranial bone dysplasia as seen in our patients. The tedc1-/- mutant zebrafish were sterile and did not have developed gonads. Furthermore, we showed that biallelic TEDC1 deletion causes cilia abnormalities through defective acetylated tubulins.

    DOI: 10.1038/s41431-025-01802-3

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  • BET Inhibition Rescues Acinar-Ductal-Metaplasia and Ciliogenesis and Ameliorates Chronic Pancreatitis-Driven Changes in Mice With Loss of the Polarity Protein Par3.

    Shields MA, Metropulos AE, Spaulding C, Alzahrani KA, Hirose T, Ohno S, Pham TND, Munshi HG

    Cellular and molecular gastroenterology and hepatology   2024.8

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    <h4>Background & aims</h4>The apical-basal polarity of pancreatic acinar cells is essential for maintaining tissue architecture. However, the mechanisms by which polarity proteins regulate acinar pancreas injury and regeneration are poorly understood.<h4>Methods</h4>Cerulein-induced pancreatitis was induced in mice with conditional deletion of the polarity protein Par3 in the pancreas. The impact of Par3 loss on pancreas injury and regeneration was assessed by histologic analyses and transcriptional profiling by RNA sequencing. Mice were pretreated with the bromodomain and extraterminal domain (BET) inhibitor JQ1 before cotreatment with cerulein to determine the effect of BET inhibition on pancreas injury and regeneration.<h4>Results</h4>Initially, we show that Par3 is increased in acinar-ductal metaplasia (ADM) lesions present in human and mouse chronic pancreatitis specimens. Although Par3 loss disrupts tight junctions, Par3 is dispensable for pancreatogenesis. However, with aging, Par3 loss results in low-grade inflammation, acinar degeneration, and pancreatic lipomatosis. Par3 loss exacerbates acute pancreatitis-induced injury and chronic pancreatitis-induced acinar cell loss, promotes pancreatic lipomatosis, and prevents regeneration. Par3 loss also results in suppression of chronic pancreatitis-induced ADM and primary ciliogenesis. Notably, targeting BET proteins attenuates chronic pancreatitis-induced loss of primary cilia and promotes ADM in mice lacking pancreatic Par3. Targeting BET proteins also attenuates cerulein-induced acinar cell loss and enhances recovery of acinar cell mass and body weight of mice lacking pancreatic Par3.<h4>Conclusions</h4>Combined, this study demonstrates how Par3 restrains chronic pancreatitis-induced changes in the pancreas and identifies a potential role for BET inhibitors to attenuate pancreas injury and facilitate regeneration.

    DOI: 10.1016/j.jcmgh.2024.101389

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  • Chimera RNA transcribed from integrated HPV18 genome with adjacent host genomic region promotes oncogenic gene expression through condensate formation. Reviewed International journal

    Kazuki Furugori, Hidefumi Suzuki, Ryota Abe, Keiko Horiuchi, Tomohiko Akiyama, Tomonori Hirose, Atsushi Toyoda, Hidehisa Takahashi

    Genes to cells : devoted to molecular & cellular mechanisms   2024.5

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    Most cervical cancers are caused by human papillomavirus (HPV) infection. In HeLa cells, the HPV18 viral genome is integrated at chromosome 8q24.21 and activates transcription of the proto-oncogene c-Myc. However, the mechanism of how the integrated HPV genome and its transcribed RNAs exhibit transcription activation function has not been fully elucidated. In this study, we found that HPV18 transcripts contain an enhancer RNA-like function to activate proximal genes including CCAT1-5L and c-Myc. We showed that the human genome-integrated HPV18 genes are activated by transcription coregulators including BRD4 and Mediator. The transcribed HPV18 RNAs form a liquid-like condensate at chromosome 8q24.21 locus, which in turn accumulates RNA polymerase II. Moreover, we focused on a relatively uncharacterized transcript from the upstream region of CCAT1, named URC. The URC RNA is transcribed as a chimera RNA with HPV18 and is composed of the 3'-untranslated region of the HPV18 transcript. We experimentally showed that the URC contributes to stabilization of HPV18 RNAs by supplying a polyadenylation site for the HPV18 transcript. Our findings suggest that integrated HPV18 at 8q24.21 locus produces HPV18-URC chimera RNA and promotes tumorigenesis through RNA-based condensate formation.

    DOI: 10.1111/gtc.13121

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  • The 3' Pol II pausing at replication-dependent histone genes is regulated by Mediator through Cajal bodies' association with histone locus bodies. International journal

    Hidefumi Suzuki, Ryota Abe, Miho Shimada, Tomonori Hirose, Hiroko Hirose, Keisuke Noguchi, Yoko Ike, Nanami Yasui, Kazuki Furugori, Yuki Yamaguchi, Atsushi Toyoda, Yutaka Suzuki, Tatsuro Yamamoto, Noriko Saitoh, Shigeo Sato, Chieri Tomomori-Sato, Ronald C Conaway, Joan W Conaway, Hidehisa Takahashi

    Nature communications   13 ( 1 )   2905 - 2905   2022.5

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    Non-polyadenylated mRNAs of replication-dependent histones (RDHs) are synthesized by RNA polymerase II (Pol II) at histone locus bodies (HLBs). HLBs frequently associate with Cajal bodies (CBs), in which 3'-end processing factors for RDH genes are enriched; however, this association's role in transcription termination of RDH genes remains unclear. Here, we show that Pol II pauses immediately upstream of transcript end sites of RDH genes and Mediator plays a role in this Pol II pausing through CBs' association with HLBs. Disruption of the Mediator docking site for Little elongation complex (LEC)-Cap binding complex (CBC)-Negative elongation factor (NELF), components of CBs, interferes with CBs' association with HLBs and 3' Pol II pausing, resulting in increased aberrant unprocessed RDH gene transcripts. Our findings suggest Mediator's involvement in CBs' association with HLBs to facilitate 3' Pol II pausing and subsequent 3'-end processing of RDH genes by supplying 3'-end processing factors.

    DOI: 10.1038/s41467-022-30632-w

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  • Collagen XVII deficiency alters epidermal patterning. International journal

    Yunan Wang, Hiroyuki Kitahata, Hideyuki Kosumi, Mika Watanabe, Yu Fujimura, Shota Takashima, Shin-Ichi Osada, Tomonori Hirose, Wataru Nishie, Masaharu Nagayama, Hiroshi Shimizu, Ken Natsuga

    Laboratory investigation; a journal of technical methods and pathology   102 ( 6 )   581 - 588   2022.2

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    Vertebrates exhibit patterned epidermis, exemplified by scales/interscales in mice tails and grooves/ridges on the human skin surface (microtopography). Although the role of spatiotemporal regulation of stem cells (SCs) has been implicated in this process, the mechanism underlying the development of such epidermal patterns is poorly understood. Here, we show that collagen XVII (COL17), a niche for epidermal SCs, helps stabilize epidermal patterns. Gene knockout and rescue experiments revealed that COL17 maintains the width of the murine tail scale epidermis independently of epidermal cell polarity. Skin regeneration after wounding was associated with slender scale epidermis, which was alleviated by overexpression of human COL17. COL17-negative skin in human junctional epidermolysis bullosa showed a distinct epidermal pattern from COL17-positive skin that resulted from revertant mosaicism. These results demonstrate that COL17 contributes to defining mouse tail scale shapes and human skin microtopography. Our study sheds light on the role of the SC niche in tissue pattern formation.

    DOI: 10.1038/s41374-022-00738-2

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  • De novo ATP1A3 variants cause polymicrogyria. International journal

    Satoko Miyatake, Mitsuhiro Kato, Takuma Kumamoto, Tomonori Hirose, Eriko Koshimizu, Takaaki Matsui, Hideyuki Takeuchi, Hiroshi Doi, Keisuke Hamada, Mitsuko Nakashima, Kazunori Sasaki, Akio Yamashita, Atsushi Takata, Kohei Hamanaka, Mai Satoh, Takabumi Miyama, Yuri Sonoda, Momoko Sasazuki, Hiroyuki Torisu, Toshiro Hara, Yasunari Sakai, Yushi Noguchi, Mazumi Miura, Yoko Nishimura, Kazuyuki Nakamura, Hideyuki Asai, Nodoka Hinokuma, Fuyuki Miya, Tatsuhiko Tsunoda, Masami Togawa, Yukihiro Ikeda, Nobusuke Kimura, Kaoru Amemiya, Asako Horino, Masataka Fukuoka, Hiroko Ikeda, Goni Merhav, Nina Ekhilevitch, Masaki Miura, Takeshi Mizuguchi, Noriko Miyake, Atsushi Suzuki, Shouichi Ohga, Hirotomo Saitsu, Hidehisa Takahashi, Fumiaki Tanaka, Kazuhiro Ogata, Chiaki Ohtaka-Maruyama, Naomichi Matsumoto

    Science advances   7 ( 13 )   2021.3

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    Polymicrogyria is a common malformation of cortical development whose etiology remains elusive. We conducted whole-exome sequencing for 124 patients with polymicrogyria and identified de novo ATP1A3 variants in eight patients. Mutated ATP1A3 causes functional brain diseases, including alternating hemiplegia of childhood (AHC), rapid-onset dystonia parkinsonism (RDP), and cerebellar ataxia, areflexia, pes cavus, optic nerve atrophy, and sensorineural deafness (CAPOS). However, our patients showed no clinical features of AHC, RDP, or CAPOS and had a completely different phenotype: a severe form of polymicrogyria with epilepsy and developmental delay. Detected variants had different locations in ATP1A3 and different functional properties compared with AHC-, RDP-, or CAPOS-associated variants. In the developing cerebral cortex of mice, radial neuronal migration was impaired in neurons overexpressing the ATP1A3 variant of the most severe patients, suggesting that this variant is involved in cortical malformation pathogenesis. We propose a previously unidentified category of polymicrogyria associated with ATP1A3 abnormalities.

    DOI: 10.1126/sciadv.abd2368

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  • Type XVII collagen interacts with the aPKC-PAR complex and maintains epidermal cell polarity. International journal

    Mika Watanabe, Hideyuki Kosumi, Shin-Ichi Osada, Shota Takashima, Yunan Wang, Wataru Nishie, Tsukasa Oikawa, Tomonori Hirose, Hiroshi Shimizu, Ken Natsuga

    Experimental dermatology   30 ( 1 )   62 - 67   2021.1

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    Type XVII collagen (COL17) is a transmembrane protein expressed in the basal epidermis. COL17 serves as a niche for epidermal stem cells, and although its reduction has been implicated in altering cell polarity and ageing of the epidermis, it is unknown how COL17 affects epidermal cell polarity. Here, we uncovered COL17 as a binding partner of the aPKC-PAR complex, which is a key regulating factor of cell polarity. Immunoprecipitation-immunoblot assay and protein-protein binding assay revealed that COL17 interacts with aPKC and PAR3. COL17 deficiency or epidermis-specific aPKCλ deletion destabilized PAR3 distribution in the epidermis, while aPKCζ knockout did not. Asymmetrical cell division was pronounced in COL17-null neonatal paw epidermis. These results show that COL17 is pivotal for maintaining epidermal cell polarity. Our study highlights the previously unrecognized role of COL17 in the basal keratinocytes.

    DOI: 10.1111/exd.14196

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  • A phospho-switch controls RNF43-mediated degradation of Wnt receptors to suppress tumorigenesis

    Tadasuke Tsukiyama, Juqi Zou, Jihoon Kim, Shohei Ogamino, Yuki Shino, Takamasa Masuda, Alessandra Merenda, Masaki Matsumoto, Yoichiro Fujioka, Tomonori Hirose, Sayuri Terai, Hidehisa Takahashi, Tohru Ishitani, Keiichi I. Nakayama, Yusuke Ohba, Bon-Kyoung Koo, Shigetsugu Hatakeyama

    Nature Communications   11 ( 1 )   2020.12

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    <title>Abstract</title>
    Frequent mutation of the tumour suppressor RNF43 is observed in many cancers, particularly colon malignancies. RNF43, an E3 ubiquitin ligase, negatively regulates Wnt signalling by inducing degradation of the Wnt receptor Frizzled. In this study, we discover that RNF43 activity requires phosphorylation at a triplet of conserved serines. This phospho-regulation of RNF43 is required for zebrafish development and growth of mouse intestinal organoids. Cancer-associated mutations that abrogate RNF43 phosphorylation cooperate with active Ras to promote tumorigenesis by abolishing the inhibitory function of RNF43 in Wnt signalling while maintaining its inhibitory function in p53 signalling. Our data suggest that RNF43 mutations cooperate with KRAS mutations to promote multi-step tumorigenesis via the Wnt-Ras-p53 axis in human colon cancers. Lastly, phosphomimetic substitutions of the serine trio restored the tumour suppressive activity of extracellular oncogenic mutants. Therefore, harnessing phospho-regulation of RNF43 might be a potential therapeutic strategy for tumours with RNF43 mutations.

    DOI: 10.1038/s41467-020-18257-3

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    Other Link: http://www.nature.com/articles/s41467-020-18257-3

  • Phosphorylation and dephosphorylation of Ser852 and Ser889 control the clustering, localization and function of PAR3. International journal

    Kazunari Yamashita, Keiko Mizuno, Kana Furukawa, Hiroko Hirose, Natsuki Sakurai, Maki Masuda-Hirata, Yoshiko Amano, Tomonori Hirose, Atsushi Suzuki, Shigeo Ohno

    Journal of cell science   133 ( 22 )   2020.11

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    Cell polarity is essential for various asymmetric cellular events, and the partitioning defective (PAR) protein PAR3 (encoded by PARD3 in mammals) plays a unique role as a cellular landmark to establish polarity. In epithelial cells, PAR3 localizes at the subapical border, such as the tight junction in vertebrates, and functions as an apical determinant. Although we know a great deal about the regulators of PAR3 localization, how PAR3 is concentrated and localized to a specific membrane domain remains an important question to be clarified. In this study, we demonstrate that ASPP2 (also known as TP53BP2), which controls PAR3 localization, links PAR3 and protein phosphatase 1 (PP1). The ASPP2-PP1 complex dephosphorylates a novel phosphorylation site, Ser852, of PAR3. Furthermore, Ser852- or Ser889-unphosphorylatable PAR3 mutants form protein clusters, and ectopically localize to the lateral membrane. Concomitance of clustering and ectopic localization suggests that PAR3 localization is a consequence of local clustering. We also demonstrate that unphosphorylatable forms of PAR3 exhibited a low molecular turnover and failed to coordinate rapid reconstruction of the tight junction, supporting that both the phosphorylated and dephosphorylated states are essential for the functional integrity of PAR3.

    DOI: 10.1242/jcs.244830

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  • The role of Mediator and Little Elongation Complex in transcription termination. Reviewed International journal

    Hidehisa Takahashi, Amol Ranjan, Shiyuan Chen, Hidefumi Suzuki, Mio Shibata, Tomonori Hirose, Hiroko Hirose, Kazunori Sasaki, Ryota Abe, Kai Chen, Yanfeng He, Ying Zhang, Ichigaku Takigawa, Tadasuke Tsukiyama, Masashi Watanabe, Satoshi Fujii, Midori Iida, Junichi Yamamoto, Yuki Yamaguchi, Yutaka Suzuki, Masaki Matsumoto, Keiichi I Nakayama, Michael P Washburn, Anita Saraf, Laurence Florens, Shigeo Sato, Chieri Tomomori-Sato, Ronald C Conaway, Joan W Conaway, Shigetsugu Hatakeyama

    Nature communications   11 ( 1 )   1063 - 1063   2020.2

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    Mediator is a coregulatory complex that regulates transcription of Pol II-dependent genes. Previously, we showed that human Mediator subunit MED26 plays a role in the recruitment of Super Elongation Complex (SEC) or Little Elongation Complex (LEC) to regulate the expression of certain genes. MED26 plays a role in recruiting SEC to protein-coding genes including c-myc and LEC to small nuclear RNA (snRNA) genes. However, how MED26 engages SEC or LEC to regulate distinct genes is unclear. Here, we provide evidence that MED26 recruits LEC to modulate transcription termination of non-polyadenylated transcripts including snRNAs and mRNAs encoding replication-dependent histone (RDH) at Cajal bodies. Our findings indicate that LEC recruited by MED26 promotes efficient transcription termination by Pol II through interaction with CBC-ARS2 and NELF/DSIF, and promotes 3' end processing by enhancing recruitment of Integrator or Heat Labile Factor to snRNA or RDH genes, respectively.

    DOI: 10.1038/s41467-020-14849-1

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  • Gain-of-Function MN1 Truncation Variants Cause a Recognizable Syndrome with Craniofacial and Brain Abnormalities. Reviewed International journal

    Noriko Miyake, Hidehisa Takahashi, Kazuyuki Nakamura, Bertrand Isidor, Yoko Hiraki, Eriko Koshimizu, Masaaki Shiina, Kazunori Sasaki, Hidefumi Suzuki, Ryota Abe, Yayoi Kimura, Tomoko Akiyama, Shin-Ichi Tomizawa, Tomonori Hirose, Kohei Hamanaka, Satoko Miyatake, Satomi Mitsuhashi, Takeshi Mizuguchi, Atsushi Takata, Kazuyuki Obo, Mitsuhiro Kato, Kazuhiro Ogata, Naomichi Matsumoto

    American journal of human genetics   106 ( 1 )   13 - 25   2020.1

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    MN1 was originally identified as a tumor-suppressor gene. Knockout mouse studies have suggested that Mn1 is associated with craniofacial development. However, no MN1-related phenotypes have been established in humans. Here, we report on three individuals who have de novo MN1 variants that lead to a protein lacking the carboxyl (C) terminus and who presented with severe developmental delay, craniofacial abnormalities with specific facial features, and structural abnormalities in the brain. An in vitro study revealed that the deletion of the C-terminal region led to increased protein stability, an inhibitory effect on cell proliferation, and enhanced MN1 aggregation in nuclei compared to what occurred in the wild type, suggesting that a gain-of-function mechanism is involved in this disease. Considering that C-terminal deletion increases the fraction of intrinsically disordered regions of MN1, it is possible that altered phase separation could be involved in the mechanism underlying the disease. Our data indicate that MN1 participates in transcriptional regulation of target genes through interaction with the transcription factors PBX1, PKNOX1, and ZBTB24 and that mutant MN1 impairs the binding with ZBTB24 and RING1, which is an E3 ubiquitin ligase. On the basis of our findings, we propose the model that C-terminal deletion interferes with MN1's interaction molecules related to the ubiquitin-mediated proteasome pathway, including RING1, and increases the amount of the mutant protein; this increase leads to the dysregulation of MN1 target genes by inhibiting rapid MN1 protein turnover.

    DOI: 10.1016/j.ajhg.2019.11.011

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  • Atypical protein kinase C isoforms differentially regulate directional keratinocyte migration during wound healing Reviewed

    Noguchi, N., Hirose, T., Suzuki, T., Kagaya, M., Chida, K., Ohno, S., Manabe, M., Osada, S.-I.

    Journal of Dermatological Science   93 ( 2 )   101 - 108   2019.2

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    DOI: 10.1016/j.jdermsci.2019.01.001

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  • aPKC controls endothelial growth by modulating c-Myc via FoxO1 DNA-binding ability. Reviewed International journal

    Meghan Riddell, Akiko Nakayama, Takao Hikita, Fatemeh Mirzapourshafiyi, Takuji Kawamura, Ayesha Pasha, Mengnan Li, Mikio Masuzawa, Mario Looso, Tim Steinbacher, Klaus Ebnet, Michael Potente, Tomonori Hirose, Shigeo Ohno, Ingrid Fleming, Stefan Gattenlöhner, Phyu P Aung, Thuy Phung, Osamu Yamasaki, Teruki Yanagi, Hiroshi Umemura, Masanori Nakayama

    Nature communications   9 ( 1 )   5357 - 5357   2018.12

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    Strict regulation of proliferation is vital for development, whereas unregulated cell proliferation is a fundamental characteristic of cancer. The polarity protein atypical protein kinase C lambda/iota (aPKCλ) is associated with cell proliferation through unknown mechanisms. In endothelial cells, suppression of aPKCλ impairs proliferation despite hyperactivated mitogenic signaling. Here we show that aPKCλ phosphorylates the DNA binding domain of forkhead box O1 (FoxO1) transcription factor, a gatekeeper of endothelial growth. Although mitogenic signaling excludes FoxO1 from the nucleus, consequently increasing c-Myc abundance and proliferation, aPKCλ controls c-Myc expression via FoxO1/miR-34c signaling without affecting its localization. We find this pathway is strongly activated in the malignant vascular sarcoma, angiosarcoma, and aPKC inhibition reduces c-Myc expression and proliferation of angiosarcoma cells. Moreover, FoxO1 phosphorylation at Ser218 and aPKC expression correlates with poor patient prognosis. Our findings may provide a potential therapeutic strategy for treatment of malignant cancers, like angiosarcoma.

    DOI: 10.1038/s41467-018-07739-0

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  • PAR-3 controls endothelial planar polarity and vascular inflammation under laminar flow. Reviewed International journal

    Hikita T, Mirzapourshafiyi F, Barbacena P, Riddell M, Pasha A, Li M, Kawamura T, Brandes RP, Hirose T, Ohno S, Gerhardt H, Matsuda M, Franco CA, Nakayama M

    EMBO reports   19 ( 9 )   2018.7

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    Impaired cell polarity is a hallmark of diseased tissue. In the cardiovascular system, laminar blood flow induces endothelial planar cell polarity, represented by elongated cell shape and asymmetric distribution of intracellular organelles along the axis of blood flow. Disrupted endothelial planar polarity is considered to be pro-inflammatory, suggesting that the establishment of endothelial polarity elicits an anti-inflammatory response. However, a causative relationship between polarity and inflammatory responses has not been firmly established. Here, we find that a cell polarity protein, PAR-3, is an essential gatekeeper of GSK3β activity in response to laminar blood flow. We show that flow-induced spatial distribution of PAR-3/aPKCλ and aPKCλ/GSK3β complexes controls local GSK3β activity and thereby regulates endothelial planar polarity. The spatial information for GSK3β activation is essential for flow-dependent polarity to the flow axis, but is not necessary for flow-induced anti-inflammatory response. Our results shed light on a novel relationship between endothelial polarity and vascular homeostasis highlighting avenues for novel therapeutic strategies.

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  • Biallelic Mutations in Nuclear Pore Complex Subunit NUP107 Cause Early-Childhood-Onset Steroid-Resistant Nephrotic Syndrome Reviewed

    Noriko Miyake, Hiroyasu Tsukaguchi, Eriko Koshimizu, Akemi Shono, Satoko Matsunaga, Masaaki Shiina, Yasuhiro Mimura, Shintaro Imamura, Tomonori Hirose, Koji Okudela, Kandai Nozu, Yuko Akioka, Motoshi Hattori, Norishige Yoshikawa, Akiko Kitamura, Hae Il Cheong, Shoji Kagami, Michiaki Yamashita, Atsushi Fujita, Satoko Miyatake, Yoshinori Tsurusaki, Mitsuko Nakashima, Hirotomo Saitsu, Kenichi. Ohashi, Naoko Imamoto, Akihide Ryo, Kazuhiro Ogata, Kazumoto Iijima, Naomichi Matsumoto

    AMERICAN JOURNAL OF HUMAN GENETICS   97 ( 4 )   555 - 566   2015.10

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  • aPKC lambda maintains the integrity of the glomerular slit diaphragm through trafficking of nephrin to the cell surface Reviewed

    Daisuke Satoh, Tomonori Hirose, Yutaka Harita, Chikara Daimon, Tomonori Harada, Hidetake Kurihara, Akio Yamashita, Shigeo Ohno

    JOURNAL OF BIOCHEMISTRY   156 ( 2 )   115 - 128   2014.8

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  • Loss of aPKC lambda in Differentiated Neurons Disrupts the Polarity Complex but Does Not Induce Obvious Neuronal Loss or Disorientation in Mouse Brains Reviewed

    Tomoyuki Yamanaka, Asako Tosaki, Masaru Kurosawa, Kazunori Akimoto, Tomonori Hirose, Shigeo Ohno, Nobutaka Hattori, Nobuyuki Nukina

    PLOS ONE   8 ( 12 )   e84036   2013.12

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  • Spatial regulation of VEGF receptor endocytosis in angiogenesis Reviewed

    Masanori Nakayama, Akiko Nakayama, Max van Lessen, Hiroyuki Yamamoto, Sarah Hoffmann, Hannes C. A. Drexler, Norimichi Itoh, Tomonori Hirose, Georg Breier, Dietmar Vestweber, Jonathan A. Cooper, Shigeo Ohno, Kozo Kaibuchi, Ralf H. Adams

    NATURE CELL BIOLOGY   15 ( 3 )   249 - 260   2013.3

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  • Tumor Type-Dependent Function of the Par3 Polarity Protein in Skin Tumorigenesis Reviewed

    Sandra Iden, Wilhelmina E. van Riel, Ronny Schafer, Ji-Ying Song, Tomonori Hirose, Shigeo Ohno, John G. Collard

    CANCER CELL   22 ( 3 )   389 - 403   2012.9

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    DOI: 10.1016/j.ccr.2012.08.004

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  • Prepubertal angiotensin blockade exerts long-term therapeutic effect through sustained ATRAP activation in salt-sensitive hypertensive rats Reviewed

    Toru Dejima, Kouichi Tamura, Hiromichi Wakui, Akinobu Maeda, Masato Ohsawa, Tomohiko Kanaoka, Sona Haku, Azushima Kengo, Shin-ichiro Masuda, Atsu-ichiro Shigenaga, Koichi Azuma, Miyuki Matsuda, Machiko Yabana, Tomonori Hirose, Kazuaki Uchino, Kazuo Kimura, Yoji Nagashima, Satoshi Umemura

    JOURNAL OF HYPERTENSION   29 ( 10 )   1919 - 1929   2011.10

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  • Involvement of Runx3 in the basal transcriptional activation of the mouse angiotensin II type 1 receptor-associated protein gene Reviewed

    Miyuki Matsuda, Kouichi Tamura, Hiromichi Wakui, Toru Dejima, Akinobu Maeda, Masato Ohsawa, Tomohiko Kanaoka, Sona Haku, Kengo Azushima, Hiroko Yamasaki, Daisuke Saito, Tomonori Hirose, Yohei Maeshima, Yoji Nagashima, Satoshi Umemura

    PHYSIOLOGICAL GENOMICS   43 ( 14 )   884 - 894   2011.7

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    DOI: 10.1152/physiolgenomics.00005.2011

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  • Intrarenal suppression of angiotensin II type 1 receptor binding molecule in angiotensin II-infused mice Reviewed

    Hiromichi Wakui, Kouichi Tamura, Miyuki Matsuda, Yunzhe Bai, Toru Dejima, Atsu-Ichiro Shigenaga, Shin-Ichiro Masuda, Koichi Azuma, Akinobu Maeda, Tomonori Hirose, Tomoaki Ishigami, Yoshiyuki Toya, Machiko Yabana, Susumu Minamisawa, Satoshi Umemura

    American Journal of Physiology - Renal Physiology   299 ( 5 )   F991 - F1003   2010.11

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    ATRAP [ANG II type 1 receptor (AT1R)-associated protein] is a molecule which directly interacts with AT1R and inhibits AT1R signaling. The aim of this study was to examine the effects of continuous ANG II infusion on the intrarenal expression and distribution of ATRAP and to determine the role of AT1R signaling in mediating these effects. C57BL/6 male mice were subjected to vehicle or ANG II infusions at doses of 200, 1,000, or 2,500 ng·kg -1·min-1 for 14 days. ANG II infusion caused significant suppression of ATRAP expression in the kidney but did not affect ATRAP expression in the testis or liver. Although only the highest ANG II dose (2,500 ng·kg-1·min-1) provoked renal pathological responses, such as an increase in the mRNA expression of angiotensinogen and the α-subunit of the epithelial sodium channel, ANG II-induced decreases in ATRAP were observed even at the lowest dose (200 ng·kg-1·min-1), particularly in the outer medulla of the kidney, based on immunohistochemical staining and Western blot analysis. The decrease in renal ATRAP expression by ANG II infusion was prevented by treatment with the AT1R-specific blocker olmesartan. In addition, the ANG II-mediated decrease in renal ATRAP expression through AT1R signaling occurred without an ANG II-induced decrease in plasma membrane AT1R expression in the kidney. On the other hand, a transgenic model increase in renal ATRAP expression beyond baseline was accompanied by a constitutive reduction of renal plasma membrane AT1R expression and by the promotion of renal AT1R internalization as well as the decreased induction of angiotensinogen gene expression in response to ANG II. These results suggest that the plasma membrane AT1R level in the kidney is modulated by intrarenal ATRAP expression under physiological and pathophysiological conditions in vivo. Copyright © 2010 the American Physiological Society.

    DOI: 10.1152/ajprenal.00738.2009

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  • Intrarenal suppression of angiotensin II type 1 receptor binding molecule in angiotensin II-infused mice Reviewed

    Hiromichi Wakui, Kouichi Tamura, Miyuki Matsuda, Yunzhe Bai, Toru Dejima, Atsu-ichiro Shigenaga, Shin-ichiro Masuda, Koichi Azuma, Akinobu Maeda, Tomonori Hirose, Tomoaki Ishigami, Yoshiyuki Toya, Machiko Yabana, Susumu Minamisawa, Satoshi Umemura

    AMERICAN JOURNAL OF PHYSIOLOGY-RENAL PHYSIOLOGY   299 ( 5 )   F991 - F1003   2010.11

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    Wakui H, Tamura K, Matsuda M, Bai Y, Dejima T, Shigenaga A, Masuda S, Azuma K, Maeda A, Hirose T, Ishigami T, Toya Y, Yabana M, Minamisawa S, Umemura S. Intrarenal suppression of angiotensin II type 1 receptor binding molecule in angiotensin II-infused mice. Am J Physiol Renal Physiol 299: F991-F1003, 2010. First published August 25, 2010; doi:10.1152/ajprenal.00738.2009.-ATRAP [ANG II type 1 receptor (AT1R)-associated protein] is a molecule which directly interacts with AT1R and inhibits AT1R signaling. The aim of this study was to examine the effects of continuous ANG II infusion on the intrarenal expression and distribution of ATRAP and to determine the role of AT1R signaling in mediating these effects. C57BL/6 male mice were subjected to vehicle or ANG II infusions at doses of 200, 1,000, or 2,500 ng . kg(-1) . min(-1) for 14 days. ANG II infusion caused significant suppression of ATRAP expression in the kidney but did not affect ATRAP expression in the testis or liver. Although only the highest ANG II dose (2,500 ng . kg(-1) . min(-1)) provoked renal pathological responses, such as an increase in the mRNA expression of angiotensinogen and the alpha-subunit of the epithelial sodium channel, ANG II-induced decreases in ATRAP were observed even at the lowest dose (200 ng . kg(-1) . min(-1)), particularly in the outer medulla of the kidney, based on immunohistochemical staining and Western blot analysis. The decrease in renal ATRAP expression by ANG II infusion was prevented by treatment with the AT1R-specific blocker olmesartan. In addition, the ANG II-mediated decrease in renal ATRAP expression through AT1R signaling occurred without an ANG II-induced decrease in plasma membrane AT1R expression in the kidney. On the other hand, a transgenic model increase in renal ATRAP expression beyond baseline was accompanied by a constitutive reduction of renal plasma membrane AT1R expression and by the promotion of renal AT1R internalization as well as the decreased induction of angiotensinogen gene expression in response to ANG II. These results suggest that the plasma membrane AT1R level in the kidney is modulated by intrarenal ATRAP expression under physiological and pathophysiological conditions in vivo.

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  • Expression of angiotensin II type 1 receptor-interacting molecule in normal human kidney and IgA nephropathy Reviewed

    Shin-ichiro Masuda, Kouichi Tamura, Hiromichi Wakui, Akinobu Maeda, Toru Dejima, Tomonori Hirose, Masao Toyoda, Koichi Azuma, Masato Ohsawa, Tomohiko Kanaoka, Mai Yanagi, Shin-ichiro Yoshida, Hiroshi Mitsuhashi, Miyuki Matsuda, Tomoaki Ishigami, Yoshiyuki Toya, Daisuke Suzuki, Yoji Nagashima, Satoshi Umemura

    AMERICAN JOURNAL OF PHYSIOLOGY-RENAL PHYSIOLOGY   299 ( 4 )   F720 - F731   2010.10

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    DOI: 10.1152/ajprenal.00667.2009

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  • ASPP2 Regulates Epithelial Cell Polarity through the PAR Complex Reviewed

    Weili Cong, Tomonori Hirose, Yutaka Harita, Akio Yamashita, Keiko Mizuno, Hisashi Hirano, Shigeo Ohno

    CURRENT BIOLOGY   20 ( 15 )   1408 - 1414   2010.8

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    DOI: 10.1016/j.cub.2010.06.024

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  • Expression of Toll-like receptor 9 in renal podocytes in childhood-onset active and inactive lupus nephritis Reviewed

    Hiroyuki Machida, Shuichi Ito, Tomonori Hirose, Fumihiko Takeshita, Hisashi Oshiro, Tomoko Nakamura, Masaaki Mori, Yoshiaki Inayama, Kunimasa Yan, Naoto Kobayashi, Shumpei Yokota

    NEPHROLOGY DIALYSIS TRANSPLANTATION   25 ( 8 )   2530 - 2537   2010.8

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    DOI: 10.1093/ndt/gfq058

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  • aPKC restricts the basolateral determinant PtdIns(3,4,5)P3 to the basal region Reviewed

    Shoukichi Takahama, Tomonori Hirose, Shigeo Ohno

    BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS   368 ( 2 )   249 - 255   2008.4

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    DOI: 10.1016/j.bbrc.2008.01.083

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  • Loss of partitioning-defective-3/isotype-specific interacting protein (Par-3/ASIP) in the elongating spermatid of RA175 (IGSF4A/SynCAM)-deficient mice Reviewed

    Eriko Fujita, Yuko Tanabe, Tomonori Hirose, Michel Aurrand-Lions, Tadashi Kasahara, Beat A. Imhof, Shigeo Ohno, Takashi Momoi

    AMERICAN JOURNAL OF PATHOLOGY   171 ( 6 )   1800 - 1810   2007.12

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    DOI: 10.2353/ajpath.2007.070261

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  • Neonatal pancreatic cells redifferentiate into both neural and pancreatic lineages Reviewed

    Wenping Zhao, Tomonori Hirose, Momotaro Ishikawa, Yuji Oshima, Syu-Ichi Hirai, Shigeo Ohno, Hideki Taniguchi

    BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS   352 ( 1 )   84 - 90   2007.1

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    DOI: 10.1016/j.bbrc.2006.10.179

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  • sPAR-3, a splicing variant of PAR-3, shows cellular localization and an expression pattern different from that of PAR-3 during enterocyte polarization Reviewed

    T Yoshii, K Mizuno, T Hirose, A Nakajima, H Sekihara, S Ohno

    AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY   288 ( 3 )   G564 - G570   2005.3

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    DOI: 10.1152/ajpgi.00426.2003

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  • Self-association of PAR-3-mediated by the conserved N-terminal domain contributes to the development of epithelial tight junctions Reviewed

    K Mizuno, A Suzuki, T Hirose, K Kitamura, K Kutsuzawa, M Futaki, Y Amano, S Ohno

    JOURNAL OF BIOLOGICAL CHEMISTRY   278 ( 33 )   31240 - 31250   2003.8

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    DOI: 10.1074/jbc.M303593200

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  • Mammalian LgI forms a protein complex with PAR-6 and aPKC independently of PAR-3 to regulate epithelial cell polarity Reviewed

    T Yamanaka, Y Horikoshi, Y Sugiyama, C Ishiyama, A Suzuki, T Hirose, A Iwamatsu, A Shinohara, S Ohno

    CURRENT BIOLOGY   13 ( 9 )   734 - 743   2003.4

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    DOI: 10.1016/S0960-9822(03)00244-6

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  • Regulated protein-protein interaction between aPKC and PAR-3 plays an essential role in the polarization of epithelial cells Reviewed

    Y Nagai-Tamai, K Mizuno, T Hirose, A Suzuki, S Ohno

    GENES TO CELLS   7 ( 11 )   1161 - 1171   2002.11

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    DOI: 10.1046/j.1365-2443.2002.00590.x

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  • Over-expression of PAR-3 suppresses contact-mediated inhibition of cell migration in MDCK cells Reviewed

    A Mishima, A Suzuki, M Enaka, T Hirose, K Mizuno, T Ohnishi, H Mohri, Y Ishigatsubo, S Ohno

    GENES TO CELLS   7 ( 6 )   581 - 596   2002.6

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    DOI: 10.1046/j.1365-2443.2002.00540.x

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  • Dynamic changes in protein components of the tight junction during liver regeneration Reviewed

    Y Takaki, S Hirai, N Manabe, Y Izumi, T Hirose, M Nakaya, A Suzuki, K Mizuno, K Akimoto, S Tsukita, T Shuin, S Ohno

    CELL AND TISSUE RESEARCH   305 ( 3 )   399 - 409   2001.9

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  • PAR-6 regulates aPKC activity in a novel way and mediates cell-cell contact-induced formation of the epithelial junctional complex Reviewed

    T Yamanaka, Y Horikoshi, A Suzuki, Y Sugiyama, K Kitamura, R Maniwa, Y Nagai, A Yamashita, T Hirose, H Ishikawa, S Ohno

    GENES TO CELLS   6 ( 8 )   721 - 731   2001.8

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  • The cell polarity protein ASIP/PAR-3 directly associates with junctional adhesion molecule (JAM) Reviewed

    K Ebnet, A Suzuki, Y Horikoshi, T Hirose, MK Meyer zu Brickwedde, S Ohno, D Vestweber

    EMBO JOURNAL   20 ( 14 )   3738 - 3748   2001.7

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  • Atypical protein kinase C is involved in the evolutionarily conserved PAR protein complex and plays a critical role in establishing epithelia-specific junctional structures Reviewed

    A Suzuki, T Yamanaka, T Hirose, N Manabe, K Mizuno, M Shimizu, K Akimoto, Y Izumi, T Ohnishi, S Ohno

    JOURNAL OF CELL BIOLOGY   152 ( 6 )   1183 - 1196   2001.3

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  • Muscle develops a specific form of small heat shock protein complex composed of MKBP/HSPB2 and HSPB3 during myogenic differentiation Reviewed

    Y Sugiyama, A Suzuki, M Kishikawa, R Akutsu, T Hirose, MMY Waye, SKW Tsui, S Yoshida, S Ohno

    JOURNAL OF BIOLOGICAL CHEMISTRY   275 ( 2 )   1095 - 1104   2000.1

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  • An atypical PKC directly associates and colocalizes at the epithelial tight junction with ASIP, a mammalian homologue of Caenorhabditis elegans polarity protein PAR-3 Reviewed

    Y Izumi, T Hirose, Y Tamai, S Hirai, Y Nagashima, T Fujimoto, Y Tabuse, KJ Kemphues, S Ohno

    JOURNAL OF CELL BIOLOGY   143 ( 1 )   95 - 106   1998.10

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Presentations

  • 教育講演:様々な細胞の極性を制御する共通分子機構 Invited

    廣瀬智威

    第85回 日本皮膚科学会東京支部学術大会  2021.11 

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  • PAR3 restricts the expansion of neural precursor cells by regulating hedgehog signaling

    2022.11 

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  • A component of the transcriptional mediator complex is required for spermatogenesis in mice

    Kaimon Ryu, Tomonori Hirose, Hidehisa Takahashi

    2023.12 

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Awards

  • 医学研究奨励賞

    2011.4   横浜市立大学医学会  

    廣瀬智威

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Research Projects

  • 精原幹細胞の同期的な分化制御における統合的かつ同調的な遺伝子発現調節機構の解明

    Grant number:23K06381  2023.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    廣瀬 智威

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    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

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  • 大脳皮質形成における霊長類型の神経幹細胞産生に関わる遺伝子の網羅的探索

    Grant number:20K06893  2020.4 - 2023.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    廣瀬 智威

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    霊長類型の神経幹細胞産生に関わる遺伝子を探索するため、これまでに終脳特異的PAR3欠損マウス(Par3 cKOマウス)で認められる同型の神経幹細胞の過剰産生に伴って発現変動する遺伝子をいくつか同定してきた。それらの遺伝子が関与するシグナル伝達系を制御する場として、一次シリアが中心的な役割を担うことが知られていたので、先ずこれに注目することにした。2020年度は、Par3 cKOマウスの神経幹・前駆細胞の一次シリアにおけるこの制御系の異常を捉えるべく、超解像顕微鏡を用いて当該のシグナル伝達タンパク質の定量的な局在解析を実施した。更に、当該マウスで認められる霊長類型神経幹細胞の過剰産生に伴って発現変動する候補遺伝子の網羅的探索を実施するため、十分な数の適切なマウス胚の準備を進めた。今後は、特に一次シリアの形成・機能・シグナル伝達系に関連する遺伝子に注目し、上記の超解像顕微鏡解析も応用しつつ、異常の評価・検証を行う。
    本研究の成果として、区切りとなる研究結果が得られたことから、論文投稿を前倒しで開始した。残念ながら2020年度中の採択は叶っていないものの、アピールポイントを明確化するなどの推敲を重ねており、採択を目指して注力する。
    並行して実施しているいくつかの共同研究でも進展が得られた。特に、ヒト大脳皮質形成異常の原因遺伝子の機能解析で参加した共同研究は、論文発表に結び付いた。更に別の共同研究(米国2件)に用いるため、自身で樹立したPAR3コンディショナルノックアウトマウス系統の空輸を完了した。

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  • Analysis of molecular mechanism of pathogenesis from disturbance of cell polarity caused by oxidative stress response

    Grant number:16K08739  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    HORIKOSHI Yosuke, Ohno Shigeo, Hirose Tomonori

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    Inflammatory bowel diseases processes disrupts the barrier function, inducing epithelial cell polarity. Increased permieability leads to oxidative stress-mediated chronic of inflammation. However, the effect of oxidative stress on epithelial polarity or epithelial morphology is unknown. We have also revealed that carbon tetrachloride (CCl4)-induced oxidative stress resulted in disassembly of TJs through aberrant activation of aPKC. In this study, we found that oxidative stress-mediated oxidized phosphatidylserine (OxPS) induced provokes a disturbance of epithelial cell polarity through aberrant activation of aPKC.

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  • Regulatory mechanism of hair follicle stem cell quiescence by cell polariry protein aPKC

    Grant number:15K09755  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    OSADA Shin-Ichi, HIROSE Tomonori, SUZUKI Tomoko, KAGAYA Masami

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    The isoforms of atypical protein kinase C (aPKC), aPKCζ and aPKCλ, regulate cell polarity and are expressed in the epidermis. Here, we addressed whether aPKCs are implicated in two major processes for maintaining epidermal homeostasis: cutaneous wound healing and wound-induced hair follicle neogenesis (WIHN). In epidermis-specific aPKCλ-knockout mice, wound healing was significantly retarded and WIHN was upregulated concomitantly with an increase in Wnt signaling. Conversely, wound healing and WIHN in aPKCζ-null mice were comparable to those in control littermates. These results represent the first evidence that aPKCλ, but not aPKCζ, is a key molecule linking cutaneous wound healing and WIHN.

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  • Regulation of cell polarity and cell fates in tissue stem/progenitor cells

    Grant number:23112003  2011.4 - 2016.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    OHNO Shigeo, HIROSE Tomonori, SASAKI Kazunori, NAKAYA Masaaki, GOULAS Spyros, IIDA Naoko, SATOH Daisuke, SAROH Yoshinori, TAMURA Kana, MINEMATSU Naoko, TAKAYANAGI Ayumi, FUJITA Ryouhei

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    Grant amount:\154050000 ( Direct Cost: \118500000 、 Indirect Cost:\35550000 )

    The cellular and molecular mechanisms governing the formation and the maintenance of epithelial architecture remains unclear. By using the mammary gland as a model, we have succeeded in clarifying the positive role of a polarity protein, aPKC, on stem cell proliferation. Interestingly, the same protein play a negative role on proliferation of luminal precursor cells. we further explored the mechanism; aPKC regulates different transcription factors positively, and negatively in each cases. These results seems to explain part of the mechanism for different mammary cancer types and can be used as a diagnostic marker.

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  • Molecular mechanisms of the polarity-regulating signaling

    Grant number:22247030  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    OHNO Shigeo, HIRAI Syu-ichi, SUZUKI Atsushi, AKIMOTO Kazunori, YAMASHITA Akio, HIROSE Tomonori, NAKAYA Masa-aki, SASAKI Kazunori

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    Grant amount:\44460000 ( Direct Cost: \34200000 、 Indirect Cost:\10260000 )

    To understand the molecular mechanism of the PAR-aPKC polarity complex to regulate cell polarity, we identified ASPP2 as a novel member of the PAR-aPKC polarity complex. ASPP2 as well as PAR3 localizes to the apical junctional complex of epithelial cells and their localization are mutually-dependent.Another finding involves a novel regulatory system for the exocytosis of apical membrane proteins by the PAR-aPKC polarity complex. We identified KIBRA as a competitive inhibitor of aPKC kinase activity. Further studies revealed that KIBRA suppress apical exocytosis through inhibition of the aPKC kinase activity.

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  • A study on the regulatory mechanisms of mammalian early embryogenesis trough the evolutionarily conserved cell polarity regulating system

    Grant number:21116004  2009.7 - 2014.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    SUZUKI Atsushi, HIROSE Tomonori, NAKAYA Masaaki

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    Grant amount:\151970000 ( Direct Cost: \116900000 、 Indirect Cost:\35070000 )

    In the very early stages of the mammalian embryogenesis (8 to 32 cells), the establishment of epithelial polarity in the outer cells of the cell mass is crucially important to guarantee the gradual fixation of the fates of the individual cells. Based on the fact that dynamic change of the epithelial cell polarity is crucially important for the mammalian embryonic development, in this research project, we have intensively analyzed the mechanisms by which the evolutionarily-conserved cell polarity-regulating proteins, the PAR-aPKC proteins, control the epithelial polarity. As a result, we succeeded to reveal three kinds of the novel molecular mechanisms, and provided the important insights and basis for the future research on the early embryogenesis of mammals.

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Teaching Experience

  • 医科学概論(分子生物学:分子生物学的手法を駆使した糸球体疾患の病態機構解明)

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  • 医科学実験法(細胞株を用いた遺伝子組換え実験法、PCR実験法)

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  • 代謝障害・内分泌異常、体液と電解質異常・酸塩基平衡異常

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  • 医科学概論(細胞生物学:細胞増殖と細胞分化、細胞運動とその制御)

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  • 分子細胞生物学(細胞の観察・分画・培養、細胞及び個体の遺伝子操作、細胞膜の構造、幹細胞の維持と分化、細胞の誕生・分化・死)

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  • 看護生化学(生体構成成分と 細胞の構成;遺伝情報とその発現)

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  • 分子生物学論文演習(PBL/TBL形式での原著論文読解と発表会)

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  • 分子生物学論文演習(2人/組の個別指導による原著論文読解と発表会)

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  • 分子生物学実習 (1. PCR法を用いたゲノムDNAの解析とPoint Mutationの導入;2. 大腸菌を用いたGST融合蛋白質の発現・精製・検出)

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