Toshio Kitamura

The role of antigenic peptide in CD4+ T helper phenotype development in a T cell receptor transgenic model (2004)

Tamura, Toshiki, Ariga, Haruyuki, Kinashi, Tatsuo, Uehara, Shuichiro, Kikuchi, Takeshi, Nakada, Makiyo, ...

CD4+ Th1 cells play a critical role in the induction of cell-mediated immune responses that are important for the eradication of intracellular pathogens. Peptide-25 is the major Th1 epitope for...

Negamycin Restores Dystrophin Expression in Skeletal and Cardiac Muscles of mdx Mice (2003)

Arakawa, Masayuki, Shiozuka, Masataka, Nakayama, Yuki, Hara, Takahiko, Hamada, Masa, Kondo, Shin’ichi, ...

The ability of aminoglycoside antibiotics to promote read-through of nonsense mutations has attracted interest in these drugs as potential therapeutic agents in genetic diseases. However, the...

Identification of a Human cDNA Sequence Which Encodes a Novel Membrane-associated Protein Containing a Zinc Metalloprotease Motif (2003)

Bao, Ying-Chun, Tsuruga, Hiromichi, Hirai, Momoki, Yasuda, Kazuki, Yokoi, Norihide, Kitamura, Toshio, ...

We report the cloning and characterization of a human cDNA predicted to encode a novel hydrophobic protein containing four transmembrane domains and a zinc metalloprotease motif, HEXXH, between the...

Endoplasmic reticulum stress-inducible protein, Herp, enhances presenilin-mediated generation of amyloid beta-protein (2002)

Kawamura, Yuuki, Kokame, Koichi, Yamaguchi, Haruyasu, Shiraishi, Hirohisa, Suzuki, Ryo, ...

Presenilin (PS) is essential for the gamma-cleavage required for the generation of the C terminus of amyloid beta-protein (Abeta). However, the mechanism underlying PS-mediated gamma-cleavage remains...

Core 2-containing O-glycans on CD43 are preferentially expressed in the memory subset of human CD4 T cells (1999)

Mukasa, Ryuta, Homma, Toshio, Ohtsuki, Takashi, Hosono, Osamu, Souta, Akiko, Kitamura, Toshio, ...

Human CD4 T cells can be divided into two functionally distinct subsets: a CD45RO+ memory subset and a CD45RA+ naive subset. In an attempt to identify novel cell surface molecules on these...

IL-1 up-regulates the expression of cytokine receptors on a factor-dependent human hemopoietic cell line, TF-1 (1991)

Kitamura, Toshio, Takaku, Fumimaro, Miyajlma, Atsushi, Miyasaka, M.

A factor-dependent human hemopoietic cell line, TF-1, requires interleukln 3 (IL-3) or granulocyte/acrophage colony-stimulating factor (GM-CSF) for its long-term growth. We have found that IL-4,...

A method to identify cDNAs based on localization of green fluorescent protein fusion products

Misawa, Kazuhide, Nosaka, Tetsuya, Morita, Sumiyo, Kaneko, Azusa, Nakahata, Tatsutoshi, Asano, Shigetaka, ...

We previously established a high-efficiency, retrovirus-mediated expression cloning method. Using this system, we now have developed an expression cloning method (FL-REX; fluorescence...

Bruton’s tyrosine kinase regulates apoptosis and JNK/SAPK kinase activity

Kawakami, Yuko, Miura, Toru, Bissonnette, Reid, Hata, Daisuke, Khan, Wasif N., Kitamura, Toshio, ...

Mast cells derived from Bruton’s tyrosine kinase (Btk)-defective xid or btk null mice showed greater expansion in culture containing interleukin-3 (IL-3) than those from wild-type (wt) mice....

Identification and Characterization of a Constitutively Active STAT5 Mutant That Promotes Cell Proliferation

Onishi, Mayumi, Nosaka, Tetsuya, Misawa, Kazuhide, Mui, Alice L.-F., Gorman, Daniel, McMahon, Martin, ...

STAT (signal transducers and activators of transcription) proteins are transcription factors which are activated by phosphorylation on tyrosine residues upon stimulation by cytokines. Seven members...

A Putative G Protein-Coupled Receptor, RDC1, Is a Novel Coreceptor for Human and Simian Immunodeficiency Viruses

Shimizu, Nobuaki, Soda, Yasushi, Kanbe, Katsuaki, Liu, Hui-yu, Mukai, Ryozaburo, Kitamura, Toshio, ...

More than 10 G protein-coupled receptors (GPCRs) have been shown to act as coreceptors for infection of human immunodeficiency virus type 1 (HIV-1), HIV-2, and simian immunodeficiency virus (SIV). We...

An Orphan G Protein-Coupled Receptor, GPR1, Acts as a Coreceptor To Allow Replication of Human Immunodeficiency Virus Types 1 and 2 in Brain-Derived Cells

Shimizu, Nobuaki, Soda, Yasushi, Kanbe, Katsuaki, Liu, Hui-Yu, Jinno, Atsushi, Kitamura, Toshio, ...

Twelve G protein-coupled receptors, including chemokine receptors, act as coreceptors and determinants for the cell tropisms of human immunodeficiency virus type 1 (HIV-1), HIV-2, and simian...

Functional cloning of BRF1, a regulator of ARE-dependent mRNA turnover

Stoecklin, Georg, Colombi, Marco, Raineri, Ines, Leuenberger, Sabrina, Mallaun, Michel, Schmidlin, Martin, ...

To identify regulators of AU-rich element (ARE)-dependent mRNA turnover we have followed a genetic approach using a mutagenized cell line (slowC) that fails to degrade cytokine mRNA. Accordingly, a...

Mammalian Twisted Gastrulation Is Essential for Skeleto-Lymphogenesis

Nosaka, Tetsuya, Morita, Sumiyo, Kitamura, Hidetomo, Nakajima, Hideaki, Shibata, Fumi, Morikawa, Yoshihiro, ...

Dorsoventral patterning depends on the local concentrations of the morphogens. Twisted gastrulation (TSG) regulates the extracellular availability of a mesoderm inducer, bone morphogenetic protein 4...

NFAM1, an immunoreceptor tyrosine-based activation motif-bearing molecule that regulates B cell development and signaling

Ohtsuka, Makoto, Arase, Hisashi, Takeuchi, Arata, Yamasaki, Sho, Shiina, Ritsuko, Suenaga, Tadahiro, ...

A functional cDNA cloning system was developed by using a retrovirus library encoding CD8-chimeric proteins and a nuclear factor of activated T cells (NFAT)-GFP reporter cell line to identify...

Vasorin, a transforming growth factor β-binding protein expressed in vascular smooth muscle cells, modulates the arterial response to injury in vivo

Ikeda, Yuichi, Imai, Yasushi, Kumagai, Hidetoshi, Nosaka, Tetsuya, Morikawa, Yoshihiro, Hisaoka, Tomoko, ...

Growth factors, cell-surface receptors, adhesion molecules, and extracellular matrix proteins play critical roles in vascular pathophysiology by affecting growth, migration, differentiation, and...

Dimerization of MLL fusion proteins and FLT3 activation synergize to induce multiple-lineage leukemogenesis

Ono, Ryoichi, Nakajima, Hideaki, Ozaki, Katsutoshi, Kumagai, Hidetoshi, Kawashima, Toshiyuki, Taki, Tomohiko, ...

The mechanisms by which mixed-lineage leukemia (MLL) fusion products resulting from in utero translocations in 11q23 contribute to leukemogenesis and infant acute leukemia remain elusive. It is still...

Infertility with Defective Spermiogenesis in Mice Lacking AF5q31, the Target of Chromosomal Translocation in Human Infant Leukemia

Urano, Atsushi, Endoh, Masaki, Wada, Tadashi, Morikawa, Yoshihiro, Itoh, Miyuki, Kataoka, Yuki, ...

AF5q31 (also called MCEF) was identified by its involvement in chromosomal translocation with the gene MLL (mixed lineage leukemia), which is associated with infant acute lymphoblastic leukemia....

The Constitutive Centromere Component CENP-50 Is Required for Recovery from Spindle Damage‡

Minoshima, Yukinori, Hori, Tetsuya, Okada, Masahiro, Kimura, Hiroshi, Haraguchi, Tokuko, Hiraoka, Yasushi, ...

We identified CENP-50 as a novel kinetochore component. We found that CENP-50 is a constitutive component of the centromere that colocalizes with CENP-A and CENP-H throughout the cell cycle in...

Disruption of Sept6, a Fusion Partner Gene of MLL, Does Not Affect Ontogeny, Leukemogenesis Induced by MLL-SEPT6, or Phenotype Induced by the Loss of Sept4

Ono, Ryoichi, Ihara, Masafumi, Nakajima, Hideaki, Ozaki, Katsutoshi, Kataoka-Fujiwara, Yuki, Taki, Tomohiko, ...

Septins are evolutionarily conserved GTP-binding proteins that can heteropolymerize into filaments. Recent studies have revealed that septins are involved in not only diverse normal cellular...

A method to identify cDNAs based on localization of green fluorescent protein fusion products

Misawa, Kazuhide, Nosaka, Tetsuya, Morita, Sumiyo, Kaneko, Azusa, Nakahata, Tatsutoshi, Asano, Shigetaka, ...

We previously established a high-efficiency, retrovirus-mediated expression cloning method. Using this system, we now have developed an expression cloning method (FL-REX; fluorescence...

Bruton’s tyrosine kinase regulates apoptosis and JNK/SAPK kinase activity

Kawakami, Yuko, Miura, Toru, Bissonnette, Reid, Hata, Daisuke, Khan, Wasif N., Kitamura, Toshio, ...

Mast cells derived from Bruton’s tyrosine kinase (Btk)-defective xid or btk null mice showed greater expansion in culture containing interleukin-3 (IL-3) than those from wild-type (wt) mice....

Identification and Characterization of a Constitutively Active STAT5 Mutant That Promotes Cell Proliferation

Onishi, Mayumi, Nosaka, Tetsuya, Misawa, Kazuhide, Mui, Alice L.-F., Gorman, Daniel, McMahon, Martin, ...

STAT (signal transducers and activators of transcription) proteins are transcription factors which are activated by phosphorylation on tyrosine residues upon stimulation by cytokines. Seven members...

A Putative G Protein-Coupled Receptor, RDC1, Is a Novel Coreceptor for Human and Simian Immunodeficiency Viruses

Shimizu, Nobuaki, Soda, Yasushi, Kanbe, Katsuaki, Liu, Hui-yu, Mukai, Ryozaburo, Kitamura, Toshio, ...

More than 10 G protein-coupled receptors (GPCRs) have been shown to act as coreceptors for infection of human immunodeficiency virus type 1 (HIV-1), HIV-2, and simian immunodeficiency virus (SIV). We...

An Orphan G Protein-Coupled Receptor, GPR1, Acts as a Coreceptor To Allow Replication of Human Immunodeficiency Virus Types 1 and 2 in Brain-Derived Cells

Shimizu, Nobuaki, Soda, Yasushi, Kanbe, Katsuaki, Liu, Hui-Yu, Jinno, Atsushi, Kitamura, Toshio, ...

Twelve G protein-coupled receptors, including chemokine receptors, act as coreceptors and determinants for the cell tropisms of human immunodeficiency virus type 1 (HIV-1), HIV-2, and simian...

Functional cloning of BRF1, a regulator of ARE-dependent mRNA turnover

Stoecklin, Georg, Colombi, Marco, Raineri, Ines, Leuenberger, Sabrina, Mallaun, Michel, Schmidlin, Martin, ...

To identify regulators of AU-rich element (ARE)-dependent mRNA turnover we have followed a genetic approach using a mutagenized cell line (slowC) that fails to degrade cytokine mRNA. Accordingly, a...

Mammalian Twisted Gastrulation Is Essential for Skeleto-Lymphogenesis

Nosaka, Tetsuya, Morita, Sumiyo, Kitamura, Hidetomo, Nakajima, Hideaki, Shibata, Fumi, Morikawa, Yoshihiro, ...

Dorsoventral patterning depends on the local concentrations of the morphogens. Twisted gastrulation (TSG) regulates the extracellular availability of a mesoderm inducer, bone morphogenetic protein 4...

NFAM1, an immunoreceptor tyrosine-based activation motif-bearing molecule that regulates B cell development and signaling

Ohtsuka, Makoto, Arase, Hisashi, Takeuchi, Arata, Yamasaki, Sho, Shiina, Ritsuko, Suenaga, Tadahiro, ...

A functional cDNA cloning system was developed by using a retrovirus library encoding CD8-chimeric proteins and a nuclear factor of activated T cells (NFAT)-GFP reporter cell line to identify...

Vasorin, a transforming growth factor β-binding protein expressed in vascular smooth muscle cells, modulates the arterial response to injury in vivo

Ikeda, Yuichi, Imai, Yasushi, Kumagai, Hidetoshi, Nosaka, Tetsuya, Morikawa, Yoshihiro, Hisaoka, Tomoko, ...

Growth factors, cell-surface receptors, adhesion molecules, and extracellular matrix proteins play critical roles in vascular pathophysiology by affecting growth, migration, differentiation, and...

Dimerization of MLL fusion proteins and FLT3 activation synergize to induce multiple-lineage leukemogenesis

Ono, Ryoichi, Nakajima, Hideaki, Ozaki, Katsutoshi, Kumagai, Hidetoshi, Kawashima, Toshiyuki, Taki, Tomohiko, ...

The mechanisms by which mixed-lineage leukemia (MLL) fusion products resulting from in utero translocations in 11q23 contribute to leukemogenesis and infant acute leukemia remain elusive. It is still...

Infertility with Defective Spermiogenesis in Mice Lacking AF5q31, the Target of Chromosomal Translocation in Human Infant Leukemia

Urano, Atsushi, Endoh, Masaki, Wada, Tadashi, Morikawa, Yoshihiro, Itoh, Miyuki, Kataoka, Yuki, ...

AF5q31 (also called MCEF) was identified by its involvement in chromosomal translocation with the gene MLL (mixed lineage leukemia), which is associated with infant acute lymphoblastic leukemia....

The Constitutive Centromere Component CENP-50 Is Required for Recovery from Spindle Damage‡

Minoshima, Yukinori, Hori, Tetsuya, Okada, Masahiro, Kimura, Hiroshi, Haraguchi, Tokuko, Hiraoka, Yasushi, ...

We identified CENP-50 as a novel kinetochore component. We found that CENP-50 is a constitutive component of the centromere that colocalizes with CENP-A and CENP-H throughout the cell cycle in...

Disruption of Sept6, a Fusion Partner Gene of MLL, Does Not Affect Ontogeny, Leukemogenesis Induced by MLL-SEPT6, or Phenotype Induced by the Loss of Sept4

Ono, Ryoichi, Ihara, Masafumi, Nakajima, Hideaki, Ozaki, Katsutoshi, Kataoka-Fujiwara, Yuki, Taki, Tomohiko, ...

Septins are evolutionarily conserved GTP-binding proteins that can heteropolymerize into filaments. Recent studies have revealed that septins are involved in not only diverse normal cellular...

Cloning of cDNA Encoding a Regeneration-Associated Muscle Protease Whose Expression Is Attenuated in Cell Lines Derived from Duchenne Muscular Dystrophy Patients

Nakayama, Yuki, Nara, Noriko, Kawakita, Yukiko, Takeshima, Yasuhiro, Arakawa, Masayuki, Katoh, Masaki, ...

In the dystrophin-mutant mdx mouse, an animal model for Duchenne muscular dystrophy (DMD), damaged skeletal muscles are efficiently regenerated and thus the animals thrive. The phenotypic differences...

Helicobacter cinaedi Cellulitis and Bacteremia in Immunocompetent Hosts after Orthopedic Surgery▿

Kitamura, Toshio, Kawamura, Yoshiaki, Ohkusu, Kiyofumi, Masaki, Takayuki, Iwashita, Hirofumi, Sawa, Tomohiro, ...

At various times after orthopedic operations (more than a few weeks, with an average of 29.9 days), 11 patients had a sudden onset of high temperature (average 38.9°C) and local cellulitis at...

Comprehensive analysis of myeloid lineage conversion using mice expressing an inducible form of C/EBPα

Fukuchi, Yumi, Shibata, Fumi, Ito, Miyuki, Goto-Koshino, Yuko, Sotomaru, Yusuke, Ito, Mamoru, ...

CCAAT/enhancer-binding protein (C/EBP) α is a critical regulator for early myeloid differentiation. Although C/EBPα has been shown to convert B cells into myeloid lineage, precise roles of C/EBPα...

Rac1 and a GTPase-activating protein, MgcRacGAP, are required for nuclear translocation of STAT transcription factors

Kawashima, Toshiyuki, Bao, Ying Chun, Nomura, Yasushi, Moon, Yuseok, Tonozuka, Yukio, Minoshima, Yukinori, ...

STAT transcription factors are tyrosine phosphorylated upon cytokine stimulation and enter the nucleus to activate target genes. We show that Rac1 and a GTPase-activating protein, MgcRacGAP, bind...

Ect2 and MgcRacGAP regulate the activation and function of Cdc42 in mitosis

Oceguera-Yanez, Fabian, Kimura, Kazuhiro, Yasuda, Shingo, Higashida, Chiharu, Kitamura, Toshio, Hiraoka, Yasushi, ...

Although Rho regulates cytokinesis, little was known about the functions in mitosis of Cdc42 and Rac. We recently suggested that Cdc42 works in metaphase by regulating bi-orient attachment of spindle...

Selective activation of STAT5 unveils its role in stem cell self-renewal in normal and leukemic hematopoiesis

Kato, Yuko, Iwama, Atsushi, Tadokoro, Yuko, Shimoda, Kazuya, Minoguchi, Mayu, Akira, Shizuo, ...

Although the concept of a leukemic stem cell system has recently been well accepted, its nature and the underlying molecular mechanisms remain obscure. Constitutive activation of signal transducers...

Endomucin, a CD34-like sialomucin, marks hematopoietic stem cells throughout development

Matsubara, Azusa, Iwama, Atsushi, Yamazaki, Satoshi, Furuta, Chie, Hirasawa, Ryutaro, Morita, Yohei, ...

To detect as yet unidentified cell-surface molecules specific to hematopoietic stem cells (HSCs), a modified signal sequence trap was successfully applied to mouse bone marrow (BM)...

Signal Transducer and Activator of  Transcription (STAT)5 Activation by BCR/ABL Is Dependent on Intact Src Homology (SH)3 and SH2 Domains of BCR/ABL and Is Required for Leukemogenesis

Nieborowska-Skorska, Malgorzata, Wasik, Mariusz A., Slupianek, Artur, Salomoni, Paolo, Kitamura, Toshio, Calabretta, Bruno, ...

Signal transducer and activator of transcription (STAT)5 is constitutively activated in BCR/ ABL-expressing cells, but the mechanisms and functional consequences of such activation are unknown. We...

Involvement of Bruton's Tyrosine Kinase in FcεRI-dependent Mast Cell Degranulation and Cytokine Production

Hata, Daisuke, Kawakami, Yuko, Inagaki, Naoki, Lantz, Chris S., Kitamura, Toshio, Khan, Wasif N., ...

We investigated the role of Bruton's tyrosine kinase (Btk) in FcεRI-dependent activation of mouse mast cells, using xid and btk null mutant mice. Unlike B cell development, mast cell development is...

Dok-related protein negatively regulates T cell development via its RasGTPase-activating protein and Nck docking sites

Gugasyan, Raffi, Quilici, Cathy, I, Stacey T.T., Grail, Dianne, Verhagen, Anne M., Roberts, Andrew, ...

Downstream of kinase (Dok)–related protein (DokR, also known as p56dok/FRIP/Dok-R) is implicated in cytokine and immunoreceptor signaling in myeloid and T cells. Tyrosine phosphorylation induces...

Identification of the Major Antigenic Protein of Helicobacter cinaedi and Its Immunogenicity in Humans with H. cinaedi Infections▿

Iwashita, Hirofumi, Fujii, Shigemoto, Kawamura, Yoshiaki, Okamoto, Tatsuya, Sawa, Tomohiro, Masaki, Takayuki, ...

Helicobacter cinaedi infection is now recognized as an increasingly important emerging disease. Its pathogenesis and epidemiological features are not fully understood, however. Here, we investigated...

Efficient retroviral transduction of human B-lymphoid and myeloid progenitors: marked inhibition of their growth by the Pax5 transgene

Sekine, Rieko, Kitamura, Toshio, Tsuji, Takashi, Tojo, Arinobu

We applied a coculture system for the genetic manipulation of human B-lymphoid and myeloid progenitor cells using murine bone marrow stromal cell support, and investigated the effects of forced Pax5...

A Rac GTPase-Activating Protein, MgcRacGAP, Is a Nuclear Localizing Signal-Containing Nuclear Chaperone in the Activation of STAT Transcription Factors▿ †

Kawashima, Toshiyuki, Bao, Ying Chun, Minoshima, Yukinori, Nomura, Yasushi, Hatori, Tomonori, Hori, Tetsuya, ...

In addition to their pleiotropic functions under physiological conditions, transcription factors STAT3 and STAT5 also have oncogenic activities, but how activated STATs are transported to the nucleus...