Publications by authors named "Matsukawa T"

Adrenoleukodystrophy (ALD), an X-linked leukodystrophy caused by pathogenic variants in ABCD1, exhibits a broad range of phenotypes from childhood-onset cerebral forms to adult-onset adrenomyeloneuropathy (AMN). We report a rare in-frame ABCD1 deletion c.1469_71delTGG (p.

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Purpose: Potentially toxic metals can directly induce various adverse effects on reproductive organs or interrupt essential metals' physiological activities. Despite intensive efforts to reduce these metals in the environment, chronic and low-level exposure remains a public health problem. The present study aimed to investigate prenatal metal exposure, including arsenic (As), copper (Cu), lead (Pb), manganese (Mn), rubidium (Rb), selenium (Se), and zinc (Zn), effects on birth weight.

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In this study, the mechanisms of tyrosine kinase inhibitor (TKI) resistance in chronic myeloid leukemia (CML) were investigated focusing additional sex combs-like 1 (ASXL1) gene mutations and their downstream effects. While TKIs have improved the prognosis of CML, some patients have shown resistant to therapy. Cases with mutations in epigenome-related genes such as ASXL1 are known to have a poor prognosis, but the underlying mechanisms of the poor prognosis are unclear.

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Objective Spastic paraplegia 7 (SPG7) is an autosomal recessive neurodegenerative disorder caused by biallelic pathogenic variants in SPG7. It is predominantly characterized by adult-onset slowly progressive spastic paraparesis. While SPG7 presenting with ataxia with or without spasticity is relatively common in Europe and North America, it is considered rare in Japan.

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Background: A number of immunotherapeutic approaches have been developed and are entering the clinic. Bispecific antibodies (BsAbs) are one of these modalities and induce robust efficacy by endogenous T cells in several hematological malignancies. However, most of the treated patients experience only a temporary benefit.

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Introduction: Patients with neurodegenerative disorders resulting in progressive dysphagia often require gastrostomy. Pulmonary function tests (PFTs) are crucial in presurgical evaluation; however, reports on pulmonary function in multiple system atrophy (MSA) and progressive supranuclear palsy (PSP) are limited.

Materials And Methods: This single-center, retrospective study analyzed the PFT records from patients with MSA and PSP admitted between January 2012 and October 2023.

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Objectives: We focused on how the immunophenotypes based on the distribution of CD8-positive tumor-infiltrating lymphocytes (TILs) relate to the endometrial cancer (EC) molecular subtypes and patients' prognosis.

Patients And Methods: Two cohorts of EC patients (total n = 145) were analyzed and categorized using the Molecular Risk Classifier for Endometrial cancer (ProMisE): POLEmut (POLE mutation), MMRd (mismatch repair deficiency), NSMP (no specific molecular profile), and p53abn (p53 abnormality). CD8-positive TILs, within the central tumor and the invasive margin, were examined by using immunohistochemical staining and advanced image-analysis software.

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Variants in KIF1A are associated with hereditary spastic paraplegia (SPG30), which can manifest in both pure and complex forms. We describe a Japanese family with a novel KIF1A variant presenting with a complex form of SPG30. Patient 1, a 69-year-old woman, experienced progressive gait disturbance due to spastic paraparesis and cerebellar atrophy, and intellectual disability.

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Purpose: Corneal pain is one of the most common eye symptoms caused by various types of epithelial injuries, including traumatic abrasion, chemical injury, ulcers, ultraviolet exposure, and infection. However, current therapeutic options for corneal pain are limited. In this study, we synthesized a novel quaternary ammonium compound, N-propylamiodarone bromide (NPA), and employed a rodent model of corneal injury to investigate whether NPA offers prolonged corneal analgesia through transient receptor potential vanilloid 1 (TRPV1) channel-mediated selective cellular entry, without hindering corneal epithelial recovery.

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Inducible promoters are essential for precise control of target gene expression in synthetic biological systems. However, engineering eukaryotic promoters is often more challenging than engineering prokaryotic promoters due to their greater mechanistic complexity. In this study, we describe a simple and reliable approach for constructing strongly inducible synthetic promoters with minimum leakiness in yeasts.

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Article Synopsis
  • Amyotrophic lateral sclerosis (ALS) is a progressive motor neuron disease, with recent connections made between variants in the SPTLC1 gene and both hereditary neuropathy and juvenile ALS.
  • The study analyzed genetic data from patients with familial and sporadic ALS to assess the presence and effects of SPTLC1 variants, using techniques like RT-PCR and ddPCR to evaluate splicing and genetic mosaicism.
  • A specific SPTLC1 variant was found in a 21-year-old female patient with juvenile ALS, inherited from her asymptomatic father who exhibited a mosaic form of the variant, highlighting the need for further exploration of the clinical implications of such mosaicism.
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We herein report a 26-year-old man diagnosed with Wilson's disease (WD), initially treated for schizophrenia for 11 years. At 26 years old, he was admitted because of status epilepticus. Brain magnetic resonance imaging revealed frontal-dominant leukoencephalopathy with cystic changes and basal ganglia atrophy.

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Acute myeloid leukemia (AML) is an aggressive hematological malignancy with genetic alterations. The FMS-like tyrosine kinase 3 (FLT3) gene is frequently mutated in adult de novo AML, with two types of mutations: internal tandem duplication (ITD) and point mutations in the tyrosine kinase domain. This study aimed to investigate the impact of FLT3 inhibitors and hematopoietic cell transplantation (HCT) on survival outcomes in patients with FLT3-ITD AML in a real-world setting.

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Purpose: S-equol, an isoflavone metabolite with high estrogenic activity, exhibits organ-protective effects via the phosphatidylinositol 3-kinase/protein kinase B (PI3K/Akt) signaling pathway. While estrogen has cardioprotective effects against ischemia-reperfusion injury, whether S-equol shares this capability remains uncertain. This study aimed to assess the cardioprotective effects of S-equol on stunned myocardium using an isolated rat heart model and investigate the involvement of PI3K/Akt signaling pathway.

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Article Synopsis
  • - Multiple system atrophy (MSA) is a neurodegenerative disorder that causes issues with the autonomic nervous system and can result in symptoms like cerebellar ataxia or parkinsonism.
  • - In this study, researchers looked at the frequency of expanded GAA repeats in a gene called FGF14 among 548 MSA patients, 476 individuals with unexplained ataxia, and 455 healthy people, finding a very low incidence in MSA cases.
  • - Despite one MSA patient having the GAA repeat, their symptoms did not align with spinocerebellar ataxia type 27B (SCA27B), suggesting a need for further investigation into the connection between GAA repeats and
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Introduction: l-glutamine has been shown to have cardioprotective effects in models of ischemia-reperfusion injury. Its potential cardioprotective effects when given before and during early reperfusion, however, have not been studied.

Methods: This study hypothesized that l-glutamine administered before and after myocardial ischemia provides better cardioprotection than when administered after ischemia only.

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Article Synopsis
  • CAR T cell therapy can lead to serious side effects like cytokine release syndrome (CRS) caused by interleukin-6 (IL-6) from monocyte cells.
  • The text outlines protocols to create anti-CD19 CAR T cells and measure IL-6 levels when they interact with tumor cells in a lab setting.
  • It also includes methods to develop a humanized mouse model to study IL-6 levels in the bloodstream related to CAR T cell therapy in a living organism.
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Background/aim: Precise molecular mechanisms underlying resistance to cisplatin-based chemotherapy remain unclear, while the activity of estrogen receptor-β (ERβ) has been suggested to be associated with chemosensitivity in urothelial cancer. We aimed to determine if GULP1, an adapter protein known to facilitate phagocytosis, could represent a downstream effector of ERβ and thereby modulate cisplatin sensitivity in bladder cancer.

Materials And Methods: GULP1 expression and cisplatin cytotoxicity were compared in bladder cancer lines.

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PPARγ coactivator-1α (PGC1α), as a co-activator, is known to optimize the action of several transcription factors, including androgen receptor (AR). However, the precise functions of PGC1α in prostate cancer, particularly those via the non-AR pathways, remain poorly understood. Meanwhile, our bioinformatics search suggested that PGC1α could be a direct downstream target of lysine-specific demethylase 5B (KDM5B/JARID1B/PLU1).

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  • Itai-itai disease is a severe condition caused by chronic cadmium toxicity, previously found mainly in the Jinzu River basin of Japan, but not reported in Akita prefecture until now.
  • An elderly female farmer in Akita was diagnosed with chronic renal failure and signs of cadmium nephropathy, exhibiting symptoms like bone deformities and renal anemia, suggesting the onset of itai-itai disease.
  • This case marks the first recorded instance of itai-itai disease in a cadmium-polluted area of Akita prefecture, highlighting the disease's potential spread.
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We herein report a novel de novo KCNH5 variant in a patient with refractory epileptic encephalopathy. The patient exhibited seizures at 1 year and 7 months old, which gradually worsened, leading to a bedridden status. Brain magnetic resonance imaging (MRI) showed cerebral atrophy and cerebellar hypoplasia.

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Article Synopsis
  • Multiple system atrophy (MSA) is a neurodegenerative disease that displays symptoms like autonomic failure, parkinsonism, and cerebellar ataxia.
  • Researchers used whole-genome sequencing to study the role of the GBA1 gene in MSA and dealt with challenges due to its similarity to a pseudogene, GBA1LP.
  • They found five variants with discrepancies in genetic analyses and confirmed that the variant p.L483P is associated with MSA at a significant level, suggesting it could be a risk factor for the disease.
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