Researchers Database

matsumoto ayumi

    Doctoral Course of Environmental Medicine and Human Ecology Assistant Professor
Last Updated :2021/10/19

Researcher Information

J-Global ID

Research Interests

  • pediatric neurology   Human Genetics   

Research Areas

  • Life sciences / Genetics

Association Memberships

  • JAPAN EPILEPSY SOCIETY   THE JAPAN SOCIETY OF HUMAN GENETICS   THE JAPANESE SOCIETY OF CHILD NEUROLOGY   JAPAN PEDIATRIC SOCIETY   

Published Papers

  • Matsumoto A, Nagashima M, Iwama K, Mizuguchi T, Makino S, Ikeda T, Muramatsu K, Matsumoto N, Yamagata T, Osaka H
    Brain & development 41 (8) 726 - 730 0387-7604 2019/09 [Refereed][Not invited]
  • Ayumi Matsumoto, Janyerkye Tulyeu, Rieko Furukawa, Chika Watanabe, Yukifumi Monden, Yasuyuki Nozaki, Masato Mori, Michito Namekawa, Eriko F Jimbo, Toshinori Aihara, Takanori Yamagata, Hitoshi Osaka
    Brain & development 40 (7) 587 - 591 0387-7604 2018/08 [Refereed][Not invited]
     
    Alexander disease (AxD) is a progressive neurodegenerative disease caused by a mutation in the glial fibrillary acid protein (GFAP) gene. A 4-year-old boy presented several times with hemiclonic seizures with eye deviation for a few minutes at 28 days after birth. Electroencephalogram showed independent sharp waves in the right and left temporal area. Magnetic resonance imaging showed high intensity T1-weighted images in the white matter of the frontal lobe and basal ganglia. He showed no head control at 4 years of age, and his weight gain was insufficient. He did not show macrocephaly. At 4 years of age, he died of bacterial pneumonia and septic shock. He was diagnosed with AxD, and direct sequencing revealed a de novo known mutation, c. 239 T > C, p.(F80S), in GFAP. Hela and U2-OS cells transfected with GFAP cDNA with c. 239 T > C showed dot-like cytoplasmic aggregation, similar to R239C, a common mutation found in severe infantile AxD. Aggregation in the cytoplasm caused by a GFAP mutation is a hallmark of AxD. Although there is only one previous report of a patient with an F80S mutation, our data support that F80S can cause the severe, infantile form of AxD.
  • Ayumi Matsumoto, Eri Imagawa, Noriko Miyake, Takahiro Ikeda, Mizuki Kobayashi, Masahide Goto, Naomichi Matsumoto, Takanori Yamagata, Hitoshi Osaka
    Brain and Development 40 (4) 325 - 329 1872-7131 2018/04 [Refereed][Not invited]
     
    SOX9 is responsible for campomelic dysplasia (CMPD). Symptoms of CMPD include recurrent apnea, upper respiratory infection, facial features, and shortening of the lower extremities. The variant acampomelic CMPD (ACMPD) lacks long bone curvature. A patient showed macrocephaly (+3.9 standard deviations [SD]) and minor anomalies, such as hypertelorism, palpebronasal fold, small mandible, and a cleft of soft palate without long bone curvature. From three months of age, he required tracheal intubation and artificial respiration under sedation because of tracheomalacia. Cranial magnetic resonance imaging was normal at one month of age but showed ventriculomegaly, hydrocephaly, and the corpus callosum thinning at two years of age. Exome sequencing revealed a de novo novel mutation, c. 236A > C, p (Q79P), in SOX9. Sox9 is thought to be crucial in neural stem cell development in the central and peripheral nervous system along with Sox8 and Sox10 in mice. In humans, neuronal abnormalities have been reported in cases of CMPD and ACMPD, including relative macrocephaly in 11 out of 22 and mild lateral ventriculomegaly in 2 out of 22 patients. We encountered a two-year old boy with ACMPD presenting with tracheomalacia and macrocephaly with a SOX9 mutation. We described for the first time an ACMPD patient with acquired diminished white matter and corpus callosal thinning, indicating the failure of oligodendrocyte/astrocyte development postnatally. This phenotype suggests that SOX9 plays a crucial role in human central nervous system development. Further cases are needed to clarify the relationship between human neural development and SOX9 mutations.
  • Masahide Goto, Makoto Mizuno, Ayumi Matsumoto, Zhiliang Yang, Eriko F. Jimbo, Hidenori Tabata, Takanori Yamagata, Koh-ichi Nagata
    SCIENTIFIC REPORTS 7 43945  2045-2322 2017/03 [Refereed][Not invited]
     
    In our previous study, we screened autism spectrum disorder (ASD) patients with and without sleep disorders for mutations in the coding regions of circadian-relevant genes, and detected mutations in several clock genes including NR1D1. Here, we further screened ASD patients for NR1D1 mutations and identified three novel mutations including a de novo heterozygous one c. 1499 G > A (p. R500H). We then analyzed the role of Nr1d1 in the development of the cerebral cortex in mice. Acute knockdown of mouse Nr1d1 with in utero electroporation caused abnormal positioning of cortical neurons during corticogenesis. This aberrant phenotype was rescued by wild type Nr1d1, but not by the c. 1499 G > A mutant. Time-lapse imaging revealed characteristic abnormal migration phenotypes in Nr1d1-deficient cortical neurons. When Nr1d1 was knocked down, axon extension and dendritic arbor formation of cortical neurons were also suppressed while proliferation of neuronal progenitors and stem cells at the ventricular zone was not affected. Taken together, Nr1d1 was found to play a pivotal role in corticogenesis via regulation of excitatory neuron migration and synaptic network formation. These results suggest that functional defects in NR1D1 may be related to ASD etiology and pathophysiology.
  • Yutaka Inaguma, Ayumi Matsumoto, Mariko Noda, Hidenori Tabata, Akihiko Maeda, Masahide Goto, Daisuke Usui, Eriko F. Jimbo, Kiyoshi Kikkawa, Mamitaro Ohtsuki, Mariko Y. Momoi, Hitoshi Osaka, Takanori Yamagata, Koh-ichi Nagata
    JOURNAL OF NEUROCHEMISTRY 139 (2) 245 - 255 0022-3042 2016/10 [Refereed][Not invited]
     
    Class III phosphoinositide 3-kinase (PIK3C3 or mammalian vacuolar protein sorting 34 homolog, Vps34) regulates vesicular trafficking, autophagy, and nutrient sensing. Recently, we reported that PIK3C3 is expressed in mouse cerebral cortex throughout the developmental process, especially at early embryonic stage. We thus examined the role of PIK3C3 in the development of the mouse cerebral cortex. Acute silencing of PIK3C3 with in utero electroporation method caused positional defects of excitatory neurons during corticogenesis. Time-lapse imaging revealed that the abnormal positioning was at least partially because of the reduced migration velocity. When PIK3C3 was silenced in cortical neurons in one hemisphere, axon extension to the contralateral hemisphere was also delayed. These aberrant phenotypes were rescued by RNAiresistant PIK3C3. Notably, knockdown of PIK3C3 did not affect the cell cycle of neuronal progenitors and stem cells at the ventricular zone. Taken together, PIK3C3 was thought to play a crucial role in corticogenesis through the regulation of excitatory neuron migration and axon extension. Meanwhile, when we performed comparative genomic hybridization on a patient with specific learning disorders, a 107 Kb-deletion was identified on 18q12.3 (nt. 39554147-39661206) that encompasses exons 5-23 of PIK3C3. Notably, the above aberrant migration and axon growth phenotypes were not rescued by the disease-related truncation mutant (172 amino acids) lacking the C-terminal kinase domain. Thus, functional defects of PIK3C3 might impair corticogenesis and relate to the pathophysiology of specific learning disorders and other neurodevelopmental disorders.
  • Yutaka Inaguma, Hidenori Ito, Ikuko Iwamoto, Ayumi Matsumoto, Takanori Yamagata, Hidenori Tabata, Koh-ichi Nagata
    MEDICAL MOLECULAR MORPHOLOGY 49 (1) 28 - 33 1860-1480 2016/03 [Refereed][Not invited]
     
    The mammalian Class III phosphoinositide 3-kinase (PIK3C3, also known as mammalian vacuolar protein sorting 34 homologue, Vps34) is a regulator of vesicular trafficking, autophagy, and nutrient sensing. In this study, we generated a specific antibody against PIK3C3, and carried out expression and morphological analyses of PIK3C3 during mouse brain development. In Western blotting, PIK3C3 was detected throughout the developmental process with higher expression in the early embryonic stage. In immunohistochemical analyses with embryonic day 16 mouse brain, PIK3C3 was detected strongly in the axon of cortical neurons. While PIK3C3 was distributed at the soma, nucleus, axon, and dendrites in primary cultured mouse hippocampal neurons at 3 days in vitro (div), it was also found in a punctate distribution with partial colocalization with synaptic marker, synaptophysin, at 21 div. The obtained results indicate that PIK3C3 is expressed and may have a physiological role in central nervous system during corticogenesis.
  • Zhiliang Yang, Ayumi Matsumoto, Kazuhiro Nakayama, Eriko F. Jimbo, Karin Kojima, Koh-ichi Nagata, Sadahiko Iwamoto, Takanori Yamagata
    BRAIN & DEVELOPMENT 38 (1) 91 - 99 0387-7604 2016/01 [Refereed][Not invited]
     
    Background: The genetic background of autism spectrum disorder (ASD) is considered a multi-genetic disorder with high heritability. Autistic children present with a higher prevalence of sleep disorders than has been observed in children with normal development. Some circadian-relevant genes have been associated with ASD (e.g., PER1, PER2, NPAS2, MTNR1A, and MTNR1B). Methods: We analyzed 28 ASD patients (14 with sleep disorders and 14 without) and 23 control subjects of Japanese descent. The coding regions of 18 canonical clock genes and clock-controlled genes were sequenced. Detected mutations were verified by direct sequencing analysis, and additional control individuals were screened. Results: Thirty-six base changes with amino acid changes were detected in 11 genes. Six missense changes were detected only in individuals with ASD with sleep disturbance: p.F498S in TIMELESS, p.S20R in NR1D1, p.R493C in PER3, p.H542R in CLOCK, p.L473S in ARNTL2; and p.A325V in MTNR1B. Six missense changes were detected only in individuals with ASD without sleep disturbance: p.S1241N in PER1, p.A325T in TIMELESS, p.S13T in ARNTL, p.G24E in MTNR1B, p.G24E in PER2, and p.T1177A in PER3. The p.R493C mutation in PER3 was detected in both groups. One missense change, p.P932L in PER2, was detected only in the control group. Mutations in NR1D1, CLOCK, and ARNTL2 were detected only in individuals with ASD with sleep disorder. The prevalence of the mutations detected only single time differed significantly among all ASD patients and controls (p = 0.003). Two kinds of mutations detected only in individuals with ASD with sleep disorder, p.F498S in TIMELESS and p.R366Q in PER3, were considered to affect gene function by three different methods: PolyPhen-2, scale-invariant feature transform (SIFT) prediction, and Mutation Taster (wwvv.mutationtaster.org). The mutations p.S20R in NR1D1, p.H542R in CLOCK, p.L473S in ARNTL2, p.A325T in TIMELESS, p.S13T in ARNTL, and p.G24E in PER2 were diagnosed to negatively affect gene function by more than one of these methods. Conclusion: Mutations in circadian-relevant genes affecting gene function are more frequent in patients with ASD than in controls. Circadian-relevant genes may be involved in the psychopathology of ASD. (c) 2015 The Japanese Society of Child Neurology. Published by Elsevier B.V. All rights reserved.
  • 6q21-22 deletion syndrome with interrupted aortic arch
    Ayumi Matsumoto, Yasuyuki Nozaki, Takaomi Minami, Eriko F. Jimbo, Hirohiko Shiraishi, Takanori Yamagata
    2015/06 [Refereed][Not invited]
  • Yutaka Inaguma, Hidenori Ito, Akira Hara, Ikuko Iwamoto, Ayumi Matsumoto, Takanori Yamagata, Hidenori Tabata, Koh-ichi Nagata
    NEUROSCIENCE RESEARCH 92 21 - 28 0168-0102 2015/03 [Refereed][Not invited]
     
    Timeless was originally identified in Drosophila as an essential component of circadian cycle regulation. In mammals, the ortholog of Timeless (Tim) has also implicated in cell cycle control and embryonic development. In this study, we generated a specific antibody against Tim, and carried out expression and localization analyses of Tim during mouse brain development. In Western blotting, Tim was detected throughout the developmental stage. In immunohistochemical analyses, Tim was detected strongly in neurons in the ventricular zone/subventricular zone and moderately in cortical neurons during corticogenesis. In adult mouse brain, Tim was observed moderately in cortical neurons. Notably, Tim was enriched in the nucleus of cortical neurons from embryonic to early postnatal stages while it was distributed in the cytoplasm in the adult stage. Similar distribution change from nucleus to cytoplasm was observed in the hippocampal neurons between PO and P30. In situ hybridization revealed that the tissue expression profile of Tim-mRNA was similar to that of the protein. In differentiated primary cultured mouse hippocampal neurons, Tim was detected in cell body, axon and dendrites. The obtained results suggest that Tim is expressed in neuronal tissues in a spatiotemporally regulated manner and involved in developmental stage-specific neuronal functions. (C) 2014 Elsevier Ireland Ltd and the Japan Neuroscience Society. All rights reserved.
  • Makoto Mizuno, Ayumi Matsumoto, Nanako Hamada, Hidenori Ito, Akihiko Miyauchi, Eriko F. Jimbo, Mariko Y. Momoi, Hidenori Tabata, Takanori Yamagata, Koh-ichi Nagata
    JOURNAL OF NEUROCHEMISTRY 132 (1) 61 - 69 0022-3042 2015/01 [Refereed][Not invited]
     
    Using comparative genomic hybridization analysis for an autism spectrum disorder (ASD) patient, a 73-Kb duplication at 19q13.33 (nt. 49562755-49635956) including LIN7B and 5 other genes was detected. We then identified a novel frameshift mutation in LIN7B in another ASD patient. Since LIN7B encodes a scaffold protein essential for neuronal function, we analyzed the role of Lin-7B in the development of cerebral cortex. Acute knockdown of Lin-7B with in utero electroporation caused a delay in neuronal migration during corticogenesis. When Lin-7B was knocked down in cortical neurons in one hemisphere, their axons failed to extend efficiently into the contralateral hemisphere after leaving the corpus callosum. Meanwhile, enhanced expression of Lin-7B had no effects on both cortical neuron migration and axon growth. Notably, silencing of Lin-7B did not affect the proliferation of neuronal progenitors and stem cells. Taken together, Lin-7B was found to play a pivotal role in corticogenesis through the regulation of excitatory neuron migration and interhemispheric axon growth, while further analyses are required to directly link functional defects of Lin-7B to ASD pathophysiology.
  • Ayumi Matsumoto, Makoto Mizuno, Nanako Hamada, Yasuyuki Nozaki, Eriko F. Jimbo, Mariko Y. Momoi, Koh-ichi Nagata, Takanori Yamagata
    PLOS ONE 9 (3) e92695  1932-6203 2014/03 [Refereed][Not invited]
     
    Interstitial deletion of 12q21 has been reported in four cases, which share several common clinical features, including intellectual disability (ID), low-set ears, and minor cardiac abnormalities. Comparative genomic hybridization (CGH) analysis using the Agilent Human Genome CGH 180K array was performed with the genomic DNA from a two-year-old Japanese boy with these symptoms, as well as hypoplasia of the corpus callosum. Consequently, a 14 Mb deletion at 12q21.2-q21.33 (nt. 77 203 574-91 264 613 bp), which includes 72 genes, was detected. Of these, we focused on LIN7A, which encodes a scaffold protein that is important for synaptic function, as a possible responsible gene for ID, and we analyzed its role in cerebral cortex development. Western blotting analyses revealed that Lin-7A is expressed on embryonic day (E) 13.5, and gradually increases in the mouse brain during the embryonic stage. Biochemical fractionation resulted in the enrichment of Lin-7A in the presynaptic fraction. Suppression of Lin-7A expression by RNAi, using in utero electroporation on E14.5, delayed neuronal migration on postnatal day (P) 2, and Lin-7A-deficient neurons remained in the lower zone of the cortical plate and the intermediate zone. In addition, when Lin-7A was silenced in cortical neurons in one hemisphere, axonal growth in the contralateral hemisphere was delayed; development of these neurons was disrupted such that one half did not extend into the contralateral hemisphere after leaving the corpus callosum. Taken together, LIN7A is a candidate gene responsible for 12q21-deletion syndrome, and abnormal neuronal migration and interhemispheric axon development may contribute to ID and corpus callosum hypoplasia, respectively.
  • Yamagata T, Matsumoto A, Nagata K
    No to hattatsu. Brain and development 2 46 125 - 130 0029-0831 2014/03 [Refereed][Not invited]
  • Mari Saito, Takanori Yamagata, Ayumi Matsumoto, Yusuke Shiba, Masako Nagashima, Shuhei Taniguchi, Eriko Jimbo, Mariko Y. Momoi
    BRAIN & DEVELOPMENT 36 (1) 64 - 69 0387-7604 2014/01 [Refereed][Not invited]
     
    Deletion of the monoamine oxidase (MAO)-A and MAO-B was detected in two male siblings and in their mother. The approximately 800-kb deletion, extending from about 43.0 MB to 43.8 MB, was detected by array comparative genomic hybridization analysis. The MAOA and MAOB genes were included in the deletion, but the adjacent Norrie disease gene, NDP, was not deleted. The boys had short stature, hypotonia,,severe developmental delays, episodes of sudden loss of muscle tone, exiting behavior, lip-smacking and autistic features. The serotonin levels in their cerebrospinal fluid were extremely elevated. Another set of siblings with this deletion was reported previously. We propose recognition of MAOA/B deletion syndrome as a distinct disorder. (C) 2013 The Japanese Society of Child Neurology. Published by Elsevier B.V. All rights reserved.
  • Ayumi Matsumoto, Mari Kuwajima, Kunio Miyake, Karin Kojima, Naomi Nakashima, Eriko F. Jimbo, Takeo Kubota, Mariko Y. Momoi, Takanori Yamagata
    JOURNAL OF HUMAN GENETICS 58 (11) 755 - 757 1434-5161 2013/11 [Refereed][Not invited]
     
    The ribosomal protein S6 kinase, 90 kb, polypeptide 3 gene (RPS6KA3) is responsible for Coffin-Lowry syndrome (CLS), which is characterized by intellectual disability (ID) and facial and bony abnormalities. This gene also affects nonsyndromic X-linked ID and nonsyndromic X-linked ID without bony abnormalities. Two families have been previously reported to have genetic microduplication including RPS6KA3. In the present study, we used array-comparative genomic hybridization (CGH) analysis with Agilent Human genome CGH 180K and detected a 584-kb microduplication spanning 19.92-20.50 Mb of Xp22.12 (including RPS6KA3) in the members of one family, including three brothers, two sisters, and their mother. The 15-year-old male proband and one of his brothers had mild ID and localization-related epilepsy, whereas his other brother presented borderline intelligence quotient (IQ) and attention-deficit-hyperactivity disorder (ADHD). One sister presented pervasive development disorder (PDD). Analysis of this family suggests that RPS6KA3 duplication is responsible for mild ID, ADHD, and localization-related epilepsy, and possibly for PDD.
  • Mitsuhiro Kato, Takanori Yamagata, Masaya Kubota, Hiroshi Arai, Sumimasa Yamashita, Taku Nakagawa, Takanari Fujii, Kenji Sugai, Kaoru Imai, Tami Uster, David Chitayat, Shelly Weiss, Hirofumi Kashii, Ryosuke Kusano, Ayumi Matsumoto, Kazuyuki Nakamura, Yoshinobu Oyazato, Mari Maeno, Kiyomi Nishiyama, Hirofumi Kodera, Mitsuko Nakashima, Yoshinori Tsurusaki, Noriko Miyake, Kayoko Saito, Kiyoshi Hayasaka, Naomichi Matsumoto, Hirotomo Saitsu
    EPILEPSIA 54 (7) 1282 - 1287 0013-9580 2013/07 [Refereed][Not invited]
     
    Purpose: KCNQ2 mutations have been found in patients with benign familial neonatal seizures, myokymia, or early onset epileptic encephalopathy (EOEE). In this study, we aimed to delineate the clinical spectrum of EOEE associated with KCNQ2 mutation. Methods: A total of 239 patients with EOEE, including 51 cases with Ohtahara syndrome and 104 cases with West syndrome, were analyzed by high-resolution melting (HRM) analysis or whole-exome sequencing. Detailed clinical information including electroencephalography (EEG) and brain magnetic resonance imaging (MRI) were collected from patients with KCNQ2 mutation. Key Findings: A total of nine de novo and one inherited mutations were identified (two mutations occurred recurrently). The initial seizures, which were mainly tonic seizures, occurred in the early neonatal period in all 12 patients. A suppression-burst pattern on EEG was found in most. Only three patients showed hypsarrhythmia on EEG; eight patients became seizure free when treated with carbamazepine, zonisamide, phenytoin, topiramate, or valproic acid. Although the seizures were relatively well controlled, moderate-to-profound intellectual disability was found in all except one patient who died at 3 months. Significance: De novo KCNQ2 mutations are involved in EOEE, most of which cases were diagnosed as Ohtahara syndrome. These cases showed distinct features with early neonatal onset, tonic seizures, a suppression-burst EEG pattern, infrequent evolution to West syndrome, and good response to sodium channel blockers, but poor developmental prognosis. Genetic testing for KCNQ2 should be considered for patients with EOEE.
  • Mitsuaki Iwasa, Takanori Yamagata, Masashi Mizuguchi, Masayuki Itoh, Ayumi Matsumoto, Mitsugu Hironaka, Ayako Honda, Mariko Y. Momoi, Nobuyuki Shimozawa
    Neuropathology 33 (3) 292 - 298 0919-6544 2013/06 [Refereed][Not invited]
     
    Contiguous ABCD1 DXS1357E deletion syndrome (CADDS) is a contiguous deletion syndrome involving the ABCD1 and DXS1357E/BAP31 genes on Xq28. Although ABCD1 is responsible for X-linked adrenoleukodystrophy (X-ALD), its phenotype differs from that of CADDS, which manifests with many features of Zellweger syndrome (ZS), including severe growth and developmental retardation, liver dysfunction, cholestasis and early infantile death. We report here the fourth case of CADDS, in which a boy had dysmorphic features, including a flat orbital edge, hypoplastic nose, micrognathia, inguinal hernia, micropenis, cryptorchidism and club feet, all of which are shared by ZS. The patient achieved no developmental milestones and died of pneumonia at 8 months. Biochemical studies demonstrated abnormal metabolism of very long chain fatty acids, which was higher than that seen in X-ALD. Immunocytochemistry and Western blot showed the absence of ALD protein (ALDP) despite the presence of other peroxisomal proteins. Pathological studies disclosed a small brain with hypomyelination and secondary hypoxic-ischemic changes. Neuronal heterotopia in the white matter and leptomeningeal glioneuronal heterotopia indicated a neuronal migration disorder. The liver showed fibrosis and cholestasis. The thymus and adrenal glands were hypoplastic. Array comparative genomic hybridization (CGH) analysis suggested that the deletion was a genomic rearrangement in the 90-kb span starting in DXS1357E/BACP31 exon 4 and included ABCD1, PLXNB3, SRPK3, IDH3G and SSR4, ending in PDZD4 exon 8. Thus, the absence of ALDP, when combined with defects in the B-cell antigen receptor associated protein 31 (BAP31) and other factors, severely affects VLCFA metabolism on peroxisomal functions and produces ZS-like pathology. © 2012 Japanese Society of Neuropathology.


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