101
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Ogino T, Mase K, Nozoe M, Wada T, Uchiyama Y, Fukuda Y, Domen K. Effects of arm bracing on expiratory flow limitation and lung volume in elderly COPD patients. Physiotherapy 2015. [DOI: 10.1016/j.physio.2015.03.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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102
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Kuroda Y, Ohashi I, Naruto T, Ida K, Enomoto Y, Saito T, Nagai JI, Wada T, Kurosawa K. Delineation of the KIAA2022 mutation phenotype: two patients with X-linked intellectual disability and distinctive features. Am J Med Genet A 2015; 167:1349-53. [PMID: 25900396 DOI: 10.1002/ajmg.a.37002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 01/19/2015] [Indexed: 11/06/2022]
Abstract
Next-generation sequencing has enabled the screening for a causative mutation in X-linked intellectual disability (XLID). We identified KIAA2022 mutations in two unrelated male patients by targeted sequencing. We selected 13 Japanese male patients with severe intellectual disability (ID), including four sibling patients and nine sporadic patients. Two of thirteen had a KIAA2022 mutation. Patient 1 was a 3-year-old boy. He had severe ID with autistic behavior and hypotonia. Patient 2 was a 5-year-old boy. He also had severe ID with autistic behavior, hypotonia, central hypothyroidism, and steroid-dependent nephrotic syndrome. Both patients revealed consistent distinctive features, including upswept hair, narrow forehead, downslanting eyebrows, wide palpebral fissures, long nose, hypoplastic alae nasi, open mouth, and large ears. De novo KIAA2022 mutations (p.Q705X in Patient 1, p.R322X in Patient 2) were detected by targeted sequencing and confirmed by Sanger sequencing. KIAA2022 mutations and alterations have been reported in only four families with nonsyndromic ID and epilepsy. KIAA2022 is highly expressed in the fetal and adult brain and plays a crucial role in neuronal development. These additional patients support the evidence that KIAA2022 is a causative gene for XLID.
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Musa I, Seymour J, Wada T, Narayanasamy M, Conroy S. 50 * A SURVEY OF OLDER PEOPLES' ATTITUDES TOWARDS ADVANCE CARE PLANNING. Age Ageing 2015. [DOI: 10.1093/ageing/afv033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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104
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Wada T, Takano K, Tsurusaki Y, Miyake N, Nakashima M, Saitsu H, Matsumoto N, Osaka H. Japanese familial case of myoclonus-dystonia syndrome with a splicing mutation in SGCE. Pediatr Int 2015; 57:324-6. [PMID: 25868953 DOI: 10.1111/ped.12613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 06/17/2014] [Accepted: 06/25/2014] [Indexed: 11/29/2022]
Abstract
Myoclonus-dystonia syndrome (MDS) is a rare autosomal-dominant movement disorder characterized by brief, frequently alcohol-responsive myoclonic jerks that begin in childhood or early adolescence, caused by mutations in the ε-sarcoglycan gene (SGCE). The patient was a 6-year-old boy. At 2 years 8 months, he had abnormal movement when he ran due to dystonia of his left leg. At 3 years 5 months, he exhibited dystonia and myoclonic movement of his arms when eating. Myoclonus was likely to develop when he felt anxiety or exhaustion. Genomic DNA showed a heterozygous mutation in SGCE (c.109 + 1 G > T). His father and uncle with the same mutation also experienced milder dystonia or myoclonic movements. SGCE mutation can cause a broad range of clinical symptoms between and within families. We should consider MDS as a differential diagnosis for patients with paroxysmal walking abnormalities and/or myoclonic movements.
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105
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Hatano M, Abe T, Wada T, Munehara H. Ontogenetic metamorphosis and extreme sexual dimorphism in lumpsuckers: Eumicrotremus asperrimus, Cyclopteropsis bergi and Cyclopteropsis lindbergi, may be synonymous. JOURNAL OF FISH BIOLOGY 2015; 86:1121-1128. [PMID: 25677849 DOI: 10.1111/jfb.12627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 12/17/2014] [Indexed: 06/04/2023]
Abstract
Cyclopterids were hatched from egg batches that were laid in two empty buccinid snail shells collected from a depth of 340 m in the Sea of Japan. Larvae were reared to identify species and to describe the morphological changes associated with metamorphosis. The fin rays of all fins were mostly complete and the pelvic fins were modified to form suckers, or adhesive discs, at the time of hatching. Juveniles immediately attached themselves to the bottom and there was no planktonic stage. The body surface was smooth with no spines or bony tubercles. At 4 months after hatching, the fine spines present on the head and trunk of juveniles transformed into bony tubercles. At 7 months after hatching, fishes became sexually dimorphic including the position and development patterns of bony tubercles. Importantly, these sexually dimorphic changes in morphology corresponded closely with descriptions of different species. Specifically, females could be classified as Eumicrotremus asperrimus, and young and fully developed males as Cyclopteropsis bergi and Cyclopteropsis lindbergi, respectively. These observations resolved a previously ambiguous hypothesis regarding the taxonomy of these cyclopterid taxa. Cyclopteropsis bergi and C. lindbergi may be synonyms of E. asperrimus.
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106
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Nozaki F, Kumada T, Shibata M, Fujii T, Wada T, Osaka H. [A family with creatine transporter deficiency diagnosed with urinary creatine/creatinine ratio and the family history: the third Japanese familial case]. NO TO HATTATSU = BRAIN AND DEVELOPMENT 2015; 47:49-52. [PMID: 25803912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Creatine transporter deficiency (CRTR-D) is an X-linked disorder characterized by hypotonia, developmental delay, and seizures. We report the third Japanese family with CRTR-D. The proband was an 8-year-old boy who presented with hypotonia, severe intellectual disability and two episodes of seizures associated with/without fever. Among 7 siblings (4 males, 3 females), the eldest brother had severe intellectual disability, epilepsy, and sudden death at 17 years of age, while 18-year-old third elder brother had severe intellectual disability, autism, and drug-resistant epilepsy. The proband's urinary creatine/creatinine ratio was increased. A reduced creatine peak on brain magnetic resonance spectroscopy and a known pathogenic mutation in the SLC6A8 gene (c.1661 C > T;p.Pro554Leu) confirmed the diagnosis of CRTR-D. The same mutation was found in the third elder brother. Their mother was a heterozygote. Symptoms of CRTR-D are non-specific. Urinary creatine/creatinine ratio should be measured in patients with hypotonia, developmental delay, seizure and autism whose family history indicates an X-linked inheritance.
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MESH Headings
- Adolescent
- Brain Diseases, Metabolic, Inborn/complications
- Brain Diseases, Metabolic, Inborn/diagnosis
- Brain Diseases, Metabolic, Inborn/genetics
- Brain Diseases, Metabolic, Inborn/pathology
- Child
- Creatine/deficiency
- Creatine/genetics
- Creatine/urine
- Creatinine/urine
- Epilepsy/etiology
- Female
- Humans
- Magnetic Resonance Spectroscopy
- Male
- Mental Retardation, X-Linked/complications
- Mental Retardation, X-Linked/diagnosis
- Mental Retardation, X-Linked/genetics
- Mental Retardation, X-Linked/pathology
- Mutation/genetics
- Pedigree
- Plasma Membrane Neurotransmitter Transport Proteins/deficiency
- Plasma Membrane Neurotransmitter Transport Proteins/genetics
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Abstract
One-third of all mallet fingers are associated with a fracture. Mallet fractures associated with large fracture fragments may result in volar subluxation of the distal phalanx. The management of mallet fractures varies based on injury pattern and surgeon preference. These treatment options include splinting regimens, closed reduction and percutaneous pinning and open reduction and internal fixation. Although numerous surgical techniques have been described, there is little clear consensus on operative treatment. Moreover, there is insufficient evidence to support operative over nonoperative treatment for mallet fractures.
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108
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Wada T, Shimoyama Y, Matsumoto T, Iwahara F, Yamamoto N. The influence of the exercise load on the sleep in competitive swimmers. J Sci Med Sport 2014. [DOI: 10.1016/j.jsams.2014.11.339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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109
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Tsuneki H, Wada T, Sasaoka T. SY33-4 * NICOTINIC REGULATION OF GLUCOSE METABOLISM VIA HYPOTHALAMIC OREXIN SYSTEM. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu052.143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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110
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Matsuura K, Ikegami M, Nagase Y, Wada T, Matsuura T. Clinical and ongoing pregnancy rates are improved by the addition of letrozole in the hormone replacement cycles undergoing the frozen-thawed single blastocyst transfer. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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111
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Wada T, Ikegami M, Nagase Y, Yamamoto Y, Matsuda Y, Yonezawa J, Matsuura T. Maturation rate and subsequent blastocyst development of human oocytes derived from various follicle size at the time of oocyte pick up. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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112
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Kuroda Y, Ohashi I, Saito T, Nagai JI, Ida K, Naruto T, Wada T, Kurosawa K. Deletion ofUBE3Ain brothers with Angelman syndrome at the breakpoint with an inversion at 15q11.2. Am J Med Genet A 2014; 164A:2873-8. [DOI: 10.1002/ajmg.a.36704] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 06/27/2014] [Indexed: 01/18/2023]
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113
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Kato H, Miyake F, Shimbo H, Ohya M, Sugawara H, Aida N, Anzai R, Takagi M, Okuda M, Takano K, Wada T, Iai M, Yamashita S, Osaka H. Urine screening for patients with developmental disabilities detected a patient with creatine transporter deficiency due to a novel missense mutation in SLC6A8. Brain Dev 2014; 36:630-3. [PMID: 24045174 DOI: 10.1016/j.braindev.2013.08.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 08/06/2013] [Accepted: 08/06/2013] [Indexed: 11/18/2022]
Abstract
Creatine transporter deficiency (CTD) is an example of X-linked intellectual disability syndromes, caused by mutations in SLC6A8 on Xq28. Although this is the second most frequent genetic cause of intellectual disabilities in Europe or America after Fragile X syndrome, information on the morbidity of this disease is limited in Japan. Using the HPLC screening method we have established recently, we examined samples of urine of 105 patients (73 males and 32 females) with developmental disabilities at our medical center. And we have found a family with three ID boys with a novel missense mutation in SLC6A8. This is the second report of a Japanese family case of CTD. A systematic diagnostic system of this syndrome should be established in Japan to enable us to estimate its frequency and treatment.
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MESH Headings
- Asian People
- Brain Diseases, Metabolic, Inborn/complications
- Brain Diseases, Metabolic, Inborn/diagnosis
- Brain Diseases, Metabolic, Inborn/genetics
- Brain Diseases, Metabolic, Inborn/urine
- Child
- Creatine/deficiency
- Creatine/genetics
- Creatine/urine
- Developmental Disabilities/complications
- Developmental Disabilities/genetics
- Humans
- Male
- Mental Retardation, X-Linked/complications
- Mental Retardation, X-Linked/diagnosis
- Mental Retardation, X-Linked/genetics
- Mental Retardation, X-Linked/urine
- Mutation, Missense
- Nerve Tissue Proteins/genetics
- Pedigree
- Plasma Membrane Neurotransmitter Transport Proteins/deficiency
- Plasma Membrane Neurotransmitter Transport Proteins/genetics
- Plasma Membrane Neurotransmitter Transport Proteins/urine
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114
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Haridy M, Tachikawa Y, Yoshida S, Tsuyuguchi K, Tomita M, Maeda S, Wada T, Ibi K, Sakai H, Yanai T. Mycobacterium marinum infection in Japanese forest green tree frogs (Rhacophorus arboreus). J Comp Pathol 2014; 151:277-89. [PMID: 25047922 DOI: 10.1016/j.jcpa.2014.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 03/07/2014] [Accepted: 04/24/2014] [Indexed: 11/25/2022]
Abstract
Four Japanese forest green tree frogs (Rhacophorus arboreus) were presented with emaciation, abdominal distention and ulcerative and nodular cutaneous lesions affecting the brisket, limbs, digits and ventral abdomen. Another three frogs had been found dead in the same tank 1 year previously. Necropsy examination of these seven frogs revealed splenomegaly and hepatomegaly, with multiple tan-yellow nodular foci present in the liver, spleen, heart, lungs, ovaries and kidneys. Microscopically, five frogs had necrosis and surrounding granulomatous inflammation in the liver, spleen, kidneys, lungs, intestine and ovaries, with numerous acid-fast bacilli in the areas of necrosis. Two frogs had granulomatous lesions in the lungs, liver, spleen, heart, coelomic membrane, stomach and intestinal wall. These lesions had no or minimal necrosis and few acid-fast bacilli. Mycobacterium spp. was cultured from three frogs and identified as Mycobacterium marinum by colony growth rate and photochromogenicity and DNA sequencing. This is the first report of M. marinum infection in Japanese forest green tree frogs.
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115
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Takayama K, Myouchin K, Wada T, Nakagawa H, Kichikawa K, Kurokawa S. E-065 Clinical Treatment Result of Carotid Artery Stenting in Japan: Comparison of Periprocedural Ischemic Complication by Embolic Protection Devices. J Neurointerv Surg 2014. [DOI: 10.1136/neurintsurg-2014-011343.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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116
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Miyatake S, Osaka H, Shiina M, Sasaki M, Takanashi JI, Haginoya K, Wada T, Morimoto M, Ando N, Ikuta Y, Nakashima M, Tsurusaki Y, Miyake N, Ogata K, Matsumoto N, Saitsu H. Expanding the phenotypic spectrum of TUBB4A-associated hypomyelinating leukoencephalopathies. Neurology 2014; 82:2230-7. [PMID: 24850488 DOI: 10.1212/wnl.0000000000000535] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE We performed whole-exome sequencing analysis of patients with genetically unsolved hypomyelinating leukoencephalopathies, identifying 8 patients with TUBB4A mutations and allowing the phenotypic spectrum of TUBB4A mutations to be investigated. METHODS Fourteen patients with hypomyelinating leukoencephalopathies, 7 clinically diagnosed with hypomyelination with atrophy of the basal ganglia and cerebellum (H-ABC), and 7 with unclassified hypomyelinating leukoencephalopathy, were analyzed by whole-exome sequencing. The effect of the mutations on microtubule assembly was examined by mapping altered amino acids onto 3-dimensional models of the αβ-tubulin heterodimer. RESULTS Six heterozygous missense mutations in TUBB4A, 5 of which are novel, were identified in 8 patients (6/7 patients with H-ABC [the remaining patient is an atypical case] and 2/7 patients with unclassified hypomyelinating leukoencephalopathy). In 4 cases with parental samples available, the mutations occurred de novo. Analysis of 3-dimensional models revealed that the p.Glu410Lys mutation, identified in patients with unclassified hypomyelinating leukoencephalopathy, directly impairs motor protein and/or microtubule-associated protein interactions with microtubules, whereas the other mutations affect longitudinal interactions for maintaining αβ-tubulin structure, suggesting different mechanisms in tubulin function impairment. In patients with the p.Glu410Lys mutation, basal ganglia atrophy was unobserved or minimal although extrapyramidal features were detected, suggesting its functional impairment. CONCLUSIONS TUBB4A mutations cause typical H-ABC. Furthermore, TUBB4A mutations associate cases of unclassified hypomyelinating leukoencephalopathies with morphologically retained but functionally impaired basal ganglia, suggesting that TUBB4A-related hypomyelinating leukoencephalopathies encompass a broader clinical spectrum than previously expected. Extrapyramidal findings may be a key for consideration of TUBB4A mutations in hypomyelinating leukoencephalopathies.
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117
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Wada T, Haddad MR, Yi L, Murakami T, Sasaki A, Shimbo H, Kodama H, Osaka H, Kaler SG. A novel two-nucleotide deletion in the ATP7A gene associated with delayed infantile onset of Menkes disease. Pediatr Neurol 2014; 50:417-20. [PMID: 24630286 PMCID: PMC3959660 DOI: 10.1016/j.pediatrneurol.2014.01.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 12/17/2013] [Accepted: 01/01/2014] [Indexed: 11/16/2022]
Abstract
BACKGROUND Determining the relationship between clinical phenotype and genotype in genetic diseases is important in clinical practice. In general, frameshift mutations are expected to produce premature termination codons, leading to production of mutant transcripts destined for degradation by nonsense-mediated decay. In X-linked recessive diseases, male patients with frameshift mutations typically have a severe or even lethal phenotype. PATIENT We report a case of a 17-month-old boy with Menkes disease (NIM #309400), an X-linked recessive copper metabolism disorder caused by mutations in the ATP7A copper transporter gene. He exhibited an unexpectedly late onset and experienced milder symptoms. STUDY AND RESULT His genomic DNA showed a de novo two-nucleotide deletion in exon 4 of ATP7A, predicting a translational frameshift and premature stop codon, and a classic severe phenotype. Characterization of his ATP7A mRNA showed no abnormal splicing. CONCLUSION We speculate that translation reinitiation could occur downstream to the premature termination codon and produce a partially functional ATP7A protein. Study of the child's fibroblasts found no evidence of translation reinitiation; however, the possibility remains that this phenomenon occurred in neural tissues and influenced the clinical phenotype.
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118
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Koura U, Sakaki-Nakatsubo H, Otsubo K, Nomura K, Oshima K, Ohara O, Wada T, Yachie A, Imai K, Morio T, Miyawaki T, Kanegane H. Successful treatment of systemic cytomegalovirus infection in severe combined immunodeficiency using allogeneic bone marrow transplantation followed by adoptive immunotherapy. J Investig Allergol Clin Immunol 2014; 24:200-202. [PMID: 25011361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
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119
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Ohshiro-Sasaki A, Shimbo H, Takano K, Wada T, Osaka H. A three-year-old boy with glucose transporter type 1 deficiency syndrome presenting with episodic ataxia. Pediatr Neurol 2014; 50:99-100. [PMID: 24200040 DOI: 10.1016/j.pediatrneurol.2013.09.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 08/26/2013] [Accepted: 09/01/2013] [Indexed: 10/26/2022]
Abstract
INTRODUCTION Glucose transporter type 1 deficiency syndrome is a metabolic encephalopathy that results from impaired glucose transport into the brain as the result of a mutation of the SLC2A1 gene. It has been recognized recently that these patients can present with a much broader clinical spectrum than previously thought. We describe a 3-year-old boy presenting with episodic ataxia. CASE REPORT Our patient exhibited periodic abnormal eye movements, including opsoclonus, since he was 4 months of age. At 2 years of age, he experienced acute cerebellar ataxia after a vaccination. Since then, he has had periodic attacks of ataxic gait, repeated vomiting, and abnormal eye movement. He was diagnosed as having episodic ataxia type 2 because the administration of acetazolamide seemed effective. By 3 years and 10 months of age, he exhibited mild mental retardation and mild trunk ataxia. The attacks were more likely to occur when he was hungry. Molecular analysis revealed that the SLC2A1 gene had a de novo mutation of heterozygous seven nucleotide insertion within exon 7, resulting in a frameshift. He has recently begun a modified Atkins diet; the frequency of attacks has been reduced, and his psychomotor and language skills have begun to develop. DISCUSSION Glucose transporter type 1 deficiency syndrome should be considered in the differential diagnosis in children with episodic ataxia, even if acetazolamide is effective.
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120
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Hiraoka N, Kikuchi J, Koyama D, Wada T, Mori S, Nakamura Y, Furukawa Y. Alkylating agents induce histone H3K18 hyperacetylation and potentiate HDAC inhibitor-mediated global histone acetylation and cytotoxicity in mantle cell lymphoma. Blood Cancer J 2013; 3:e169. [PMID: 24335889 PMCID: PMC3877423 DOI: 10.1038/bcj.2013.66] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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121
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Koyama D, Kikuchi J, Hiraoka N, Wada T, Kurosawa H, Chiba S, Furukawa Y. Proteasome inhibitors exert cytotoxicity and increase chemosensitivity via transcriptional repression of Notch1 in T-cell acute lymphoblastic leukemia. Leukemia 2013; 28:1216-26. [PMID: 24301524 PMCID: PMC4051216 DOI: 10.1038/leu.2013.366] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 11/11/2013] [Accepted: 11/29/2013] [Indexed: 12/15/2022]
Abstract
The Notch signaling pathway has been recognized as a key factor for the pathogenesis of T-cell acute lymphoblastic leukemia (T-ALL), because of the high incidence of activating mutations of Notch1. Notch inhibition could serve as a new treatment strategy for T-ALL; however, the attempts to perturb Notch signaling pathways have been unsuccessful so far. In this study, we found that proteasome inhibitors exert cytotoxic effects on T-ALL cells with constitutive activation of Notch1 to a similar extent as myeloma cells. The proteasome inhibitor bortezomib repressed the transcription of Notch1 and downstream effectors including Hes1, GATA3, RUNX3 and nuclear factor-κB (NF-κB) (p65 and p50), coincided with downregulation of the major transactivator Sp1 and its dissociation from Notch1 promoter. Overexpression of the Notch1 intracellular domain (NICD) significantly ameliorated bortezomib-induced cytotoxicity against T-ALL cells. Drug combination studies revealed that bortezomib showed synergistic or additive effects with key drugs for the treatment of T-ALL such as dexamethasone (DEX), doxorubicin and cyclophosphamide, which were readily abolished by NICD overexpression. The synergy of bortezomib and DEX was confirmed in vivo using a murine xenograft model. Our findings provide a molecular basis and rationale for the inclusion of proteasome inhibitors in treatment strategies for T-ALL.
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Matsumoto T, Naito Y, Wada T, Shinohara K, Kobayakawa Y, Inoue D, Takahashi Y, Takahashi M, Jigami H. Issues in evaluating joint range of motion and unique movements in synchronized swimmers. J Sci Med Sport 2013. [DOI: 10.1016/j.jsams.2013.10.168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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123
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Jigami H, Sato N, Honma D, Shimoyama Y, Wada T, Endo N. Effects of Nordic walking in the community dwelling subjects with hip osteoarthritis. J Sci Med Sport 2013. [DOI: 10.1016/j.jsams.2013.10.146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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124
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Wada T, Matsuda Y, Muraoka M, Toma T, Takehara K, Fujimoto M, Yachie A. Alu-mediated large deletion of the CDSN gene as a cause of peeling skin disease. Clin Genet 2013; 86:383-6. [DOI: 10.1111/cge.12294] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 09/27/2013] [Accepted: 09/30/2013] [Indexed: 11/26/2022]
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125
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Yamano T, Wada T, Nishiguchi T, Oota S, Satogami K, Ino Y, Yamaguchi T, Kubo T, Imanishi T, Akasaka T. The impact of ethyl icosapentate therapy on coronary fibrous-cap thickness in acute coronary syndrome patients without hyperlipidemia: Assessment by optical coherence tomography study. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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