Faculty Profiles - KATSUNO, Masahisa

Papers - KATSUNO, Masahisa

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CAG repeat size correlates to electrophysiological motor and sensory phenotypes in SBMA. Reviewed

6. Suzuki K, Katsuno M, Banno H, Takeuchi Y, Atsuta N, Ito M, Watanabe H, Yamashita F, Hori N, Nakamura T, Hirayama M, Tanaka F, Sobue G.

Brain Vol. 131 page： 229-239 2007

Nonmyelinating Schwann cell involvement with well-preserved unmyelinated axons in Charcot-Marie-Tooth disease type 1A. Reviewed

7. Koike H, Iijima M, Mori K, Yamamoto M, Hattori N, Katsuno M, Tanaka F, Watanabe H, Doyu M, Yoshikawa H, Sobue G.

J Neuropathol Exp Neurol Vol. 66 page： 1027-1036 2007

Therapeutic strategies for spinal and bulbar muscular atrophy (SBMA). Invited

Katsuno M, Banno H, Suzuki K, Takeuchi Y, Minamiyama M, Waza M, Adachi H, Tanaka F, Sobue G.

Drug Future Vol. 32 page： 907-917 2007

Gene expressions specifically detected in motor neurons (dynactin 1, early growth response 3, acetyl-CoA transporter, death receptor 5, and cyclin C) differentially correlate to pathologic markers in sporadic amyotrophic lateral sclerosis. Reviewed

Vol. 66 page： 617-627 2007

Disulfide Bond Mediates Aggregation, Toxicity, and Ubiquitylation of Familial Amyotrophic Lateral Sclerosis-linked Mutant SOD1. Reviewed

Niwa J, Yamada S, Ishigaki S, Sone J, Takahashi M, Katsuno M, Tanaka F, Doyu M, Sobue G.

J Biol Chem Vol. 282 ( 38 ) page： 28087-28095 2007

Intravenous immunoglobulin therapy markedly ameliorates muscle weakness and severe pain in proximal diabetic neuropathy. Reviewed

Kawagashira Y, Watanabe H, Oki Y, Iijima M, Koike H, Hattori N, Katsuno M, Tanaka F, Sobue G.

J Neurol Neurosurg Psychiatry Vol. 78 ( 8 ) page： 899-901 2007

CHIP overexpression reduces mutant androgen receptor protein and ameliorates phenotypes of the spinal and bulbar muscular atrophy transgenic mouse model. Reviewed

Adachi H, Waza M, Tokui K, Katsuno M, Minamiyama M, Tanaka F, Doyu M, Sobue G.

J Neurosci Vol. 27 ( 19 ) page： 5115-5126 2007

Ataxic vs painful form of paraneoplastic neuropathy. Reviewed

Oki Y, Koike H, Iijima M, Mori K, Hattori N, Katsuno M, Nakamura T, Hirayama M, Tanaka F, Shiraishi M, Yazaki S, Nokura K, Yamamoto H, Sobue G.

Neurology Vol. 69 ( 6 ) page： 564-572 2007

Modulation of Hsp90 function in neurodegenerative disorders: a molecular-targeted therapy against disease-causing protein. Invited Reviewed

Waza M, Adachi H, Katsuno M, Minamiyama M, Tanaka F, Doyu M, Sobue G.

J Mol Med Vol. 84 page： 635-646 2006

Gene Expression Profiling toward Understanding of ALS Pathogenesis. Invited Reviewed

Tanaka F, Niwa J, Ishigaki S, Katsuno M, Waza M, Yamamoto M, Doyu M, Sobue G.

Ann N Y Acad Sci Vol. 1086 page： 1-10 2006

Alleviating Neurodegeneration by an Anticancer Agent: An Hsp90 Inhibitor (17-AAG). Invited Reviewed

Waza M, Adachi H, Katsuno M, Minamiyama M, Tanaka F, Sobue G.

Ann N Y Acad Sci Vol. 1086 page： 21-34 2006

Reversible disruption of dynactin 1-mediated retrograde axonal transport in polyglutamine-induced motor neuron degeneration. Reviewed

Katsuno M, Adachi H, Minamiyama M, Waza M, Tokui K, Banno H, Suzuki K, Onoda Y, Tanaka F, Doyu M, Sobue G.

J Neurosci Vol. 26 page： 12106-12117 2006

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Spinal and bulbar muscular atrophy (SBMA) is a hereditary neurodegenerative disease caused by an expansion of a trinucleotide CAG repeat encoding the polyglutamine tract in the androgen receptor (AR) gene. To elucidate the pathogenesis of polyglutamine-mediated motor neuron dysfunction, we investigated histopathological and biological alterations in a transgenic mouse model of SBMA carrying human pathogenic AR. In affected mice, neurofilaments and synaptophysin accumulated at the distal motor axon. A similar intramuscular accumulation of neurofilament was detected in the skeletal muscle of SBMA patients. Fluoro-gold labeling and sciatic nerve ligation demonstrated an impaired retrograde axonal transport in the transgenic mice. The mRNA level of dynactin 1, an axon motor for retrograde transport, was significantly reduced in the SBMA mice resulting from pathogenic AR-induced transcriptional dysregulation. These pathological events were observed before the onset of neurological symptoms, but were reversed by castration, which prevents nuclear accumulation of pathogenic AR. Overexpression of dynactin 1 mitigated neuronal toxicity of the pathogenic AR in a cell culture model of SBMA. These observations indicate that polyglutamine-dependent transcriptional dysregulation of dynactin 1 plays a crucial role in the reversible neuronal dysfunction in the early stage of SBMA.

Mutant androgen receptor accumulation in spinal and bulbar muscular atrophy scrotal skin: a pathogenic marker. Reviewed

Banno H, Adachi H, Katsuno M, Suzuki K, Atsuta N, Watanabe H, Tanaka F, Doyu M, Sobue G.

Ann Neurol Vol. 59 page： 520-526 2006

Natural history of spinal and bulbar muscular atrophy (SBMA): a study of 223 Japanese patients. Reviewed

Atsuta N, Watanabe H, Ito M, Banno H, Suzuki K, Katsuno M, Tanaka F, Tamakoshi A, Sobue G.

Brain Vol. 129 page： 1446-1455 2006

Pathogenesis, animal models and therapeutics in Spinal and Bulbar Muscular Atrophy (SBMA). Invited Reviewed

Katsuno M, Adachi H, Waza M, Banno H, Suzuki K, Tanaka F, Doyu M, Sobue G.

Exp Neurol Vol. 200 page： 8-18 2006

Clinicopathologic features of nonsystemic vasculitic neuropathy and microscopic polyangiitis-associated neuropathy: A comparative study. Reviewed

Sugiura M, Koike H, Iijima M, Mori K, Hattori N, Katsuno M, Tanaka F, Sobue G.

J Neurol Sci Vol. 241 page： 31-37 2006

Widespread nuclear and cytoplasmic accumulation of mutant androgen receptor in SBMA patients. Reviewed

Adachi H, Katsuno M, Minamiyama M, Waza M, Sang C, Nakagomi Y, Kobayashi Y, Tanaka F, Doyu M, Inukai A, Yoshida M, Hashizume Y, Sobue G.

Brain Vol. 128 page： 659-670 2005

Pharmacological induction of heat-shock proteins alleviates polyglutamine-mediated motor neuron disease. Reviewed

Katsuno M, Sang C, Adachi H, Minamiyama M, Waza M, Tanaka F, Doyu M, Sobue G.

Proc Natl Acad Sci USA Vol. 102 page： 16801-16806 2005

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

Spinal and bulbar muscular atrophy (SBMA) is an adult-onset motor neuron disease caused by the expansion of a trinucleotide CAG repeat encoding the polyglutamine tract in the first exon of the androgen receptor gene (AR). The pathogenic, polyglutamine-expanded AR protein accumulates in the cell nucleus in a ligand-dependent manner and inhibits transcription by interfering with transcriptional factors and coactivators. Heat-shock proteins (HSPs) are stress-induced chaperones that facilitate the refolding and, thus, the degradation of abnormal proteins. Geranylgeranylacetone (GGA), a nontoxic antiulcer drug, has been shown to potently induce HSP expression in various tissues, including the central nervous system. In a cell model of SBMA, GGA increased the levels of Hsp70, Hsp90, and Hsp105 and inhibited cell death and the accumulation of pathogenic AR. Oral administration of GGA also up-regulated the expression of HSPs in the central nervous system of SBMA-transgenic mice and suppressed nuclear accumulation of the pathogenic AR protein, resulting in amelioration of polyglutamine-dependent neuromuscular phenotypes. These observations suggest that, although a high dose appears to be needed for clinical effects, oral GGA administration is a safe and promising therapeutic candidate for polyglutamine-mediated neurodegenerative diseases, including SBMA.

17-AAG, an Hsp90 inhibitor, ameliorates polyglutamine-mediated motor neuron degeneration. Reviewed

Waza M, Adachi H, Katsuno M, Minamiyama M, Sang C, Tanaka F, Inukai A, Doyu M, Sobue G.

Nat Med Vol. 11 page： 1088-1095 2005

Language：English Publishing type：Research paper (scientific journal)

Heat-shock protein 90 (Hsp90) functions as part of a multichaperone complex that folds, activates and assembles its client proteins. Androgen receptor (AR), a pathogenic gene product in spinal and bulbar muscular atrophy (SBMA), is one of the Hsp90 client proteins. We examined the therapeutic effects of 17-allylamino-17-demethoxygeldanamycin (17-AAG), a potent Hsp90 inhibitor, and its ability to degrade polyglutamine-expanded mutant AR. Administration of 17-AAG markedly ameliorated motor impairments in the SBMA transgenic mouse model without detectable toxicity, by reducing amounts of monomeric and aggregated mutant AR. The mutant AR showed a higher affinity for Hsp90-p23 and preferentially formed an Hsp90 chaperone complex as compared to wild-type AR; mutant AR was preferentially degraded in the presence of 17-AAG in both cells and transgenic mice as compared to wild-type AR. 17-AAG also mildly induced Hsp70 and Hsp40. 17-AAG would thus provide a new therapeutic approach to SBMA and probably to other related neurodegenerative diseases.

The wide spectrum of clinical manifestations in Sjogren's syndrome-associated neuropathy. Reviewed

Mori K, Iijima M, Koike H, Hattori N, Tanaka F, Watanabe H, Katsuno M, Fujita A, Aiba I, Ogata A, Saito T, Asakura K, Yoshida M, Hirayama M, Sobue G.

Brain Vol. 128 page： 2518-2534 2005

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Papers - KATSUNO, Masahisa