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  1. Article: A method for phenylalanine self-monitoring using phenylalanine ammonia-lyase and a pre-existing portable ammonia detection system.

    Wada, Yoichi / Totsune, Eriko / Mikami-Saito, Yasuko / Kikuchi, Atsuo / Miyata, Toshio / Kure, Shigeo

    Molecular genetics and metabolism reports

    2023  Volume 35, Page(s) 100970

    Abstract: Phenylketonuria is an inborn error of phenylalanine metabolism caused by a phenylalanine hydroxylase deficiency. To prevent the occurrence of neurological symptoms and maternal complications resulting from phenylketonuria, patients must adhere to a ... ...

    Abstract Phenylketonuria is an inborn error of phenylalanine metabolism caused by a phenylalanine hydroxylase deficiency. To prevent the occurrence of neurological symptoms and maternal complications resulting from phenylketonuria, patients must adhere to a strict diet therapy, tetrahydrobiopterin supplementation, or pegvaliase injection to maintain blood phenylalanine levels within a recommended range throughout their lives. Therefore, monitoring blood phenylalanine levels is necessary to determine the recent metabolic status of phenylalanine in patients with PKU; however, there are no available instruments for individuals to monitor their own blood phenylalanine levels using whole fingertip blood. We developed a phenylalanine monitoring system (designated as PheCheck) that included a pre-existing portable ammonia detection device and phenylalanine ammonia-lyase, which converts phenylalanine to trans-cinnamic acid and ammonia. This system was able to remove 86.7% ± 0.03% of the ammonia contained in fingertip blood and successfully reduce background ammonia levels. A good correlation was found between the estimated plasma phenylalanine levels detected by PheCheck and plasma phenylalanine levels detected by high-performance liquid chromatography (R
    Language English
    Publishing date 2023-03-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2821908-9
    ISSN 2214-4269
    ISSN 2214-4269
    DOI 10.1016/j.ymgmr.2023.100970
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: [Drug discovery and development in academia].

    Miyata, Toshio

    Rinsho shinkeigaku = Clinical neurology

    2012  Volume 51, Issue 11, Page(s) 1084

    MeSH term(s) Drug Discovery ; Universities
    Language Japanese
    Publishing date 2012-01-03
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 604200-4
    ISSN 1882-0654 ; 0009-918X
    ISSN (online) 1882-0654
    ISSN 0009-918X
    DOI 10.5692/clinicalneurol.51.1084
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A PAI-1 antagonist ameliorates hypophosphatemia in the Hyp vitamin D-resistant rickets model mouse.

    Qian, Cheng / Ito, Nobuaki / Tsuji, Kunikazu / Sato, Shingo / Kikuchi, Katsushi / Yoshii, Toshitaka / Miyata, Toshio / Asou, Yoshinori

    FEBS open bio

    2023  Volume 14, Issue 2, Page(s) 290–299

    Abstract: Congenital fibroblast growth factor 23 (FGF23)-related hypophosphatemic rickets/osteomalacia is a rare bone metabolism disorder characterized by hypophosphatemia and caused by genetic abnormalities that result in excessive secretion of FGF23. Hyp mice ... ...

    Abstract Congenital fibroblast growth factor 23 (FGF23)-related hypophosphatemic rickets/osteomalacia is a rare bone metabolism disorder characterized by hypophosphatemia and caused by genetic abnormalities that result in excessive secretion of FGF23. Hyp mice are a model of X-linked hypophosphatemia (XLH) caused by deletion of the PHEX gene and excessive production of FGF23. The purpose of this study was to investigate the potential of TM5614 as a therapeutic agent for the treatment of congenital FGF23-related hypophosphatemic rickets and osteomalacia in humans by administering TM5614 to Hyp mice and examining its curative effect on hypophosphatemia. After a single oral administration of TM5614 10 mg·kg
    MeSH term(s) Mice ; Female ; Humans ; Animals ; Familial Hypophosphatemic Rickets/drug therapy ; Familial Hypophosphatemic Rickets/metabolism ; Plasminogen Activator Inhibitor 1 ; Osteomalacia/drug therapy ; Osteomalacia/metabolism ; 25-Hydroxyvitamin D3 1-alpha-Hydroxylase/therapeutic use ; Hypophosphatemia/drug therapy ; Hypophosphatemia/metabolism ; RNA, Messenger/metabolism
    Chemical Substances Plasminogen Activator Inhibitor 1 ; 25-Hydroxyvitamin D3 1-alpha-Hydroxylase (EC 1.14.15.18) ; RNA, Messenger
    Language English
    Publishing date 2023-12-25
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2651702-4
    ISSN 2211-5463 ; 2211-5463
    ISSN (online) 2211-5463
    ISSN 2211-5463
    DOI 10.1002/2211-5463.13745
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  4. Article ; Online: [Inhibition of TRPV2 Channel Activation by NK-4, a Cryptocyanine Dye].

    Koya-Miyata, Satomi / Kohno, Keizo / Morimoto, Takashi / Harashima, Akira / Iwata, Yuko / Ariyasu, Toshio

    Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan

    2022  Volume 142, Issue 5, Page(s) 535–546

    Abstract: Transient receptor potential vanilloid 2 (TRPV2) channels are expressed and play functional roles in various immune cells. Physical stimuli leading to TRPV2 activation causes mast cell degranulation. Besides their roles in immune cells, it has been shown ...

    Abstract Transient receptor potential vanilloid 2 (TRPV2) channels are expressed and play functional roles in various immune cells. Physical stimuli leading to TRPV2 activation causes mast cell degranulation. Besides their roles in immune cells, it has been shown that TRPV2 channels are pathophysiologically relevant to degenerative muscular diseases such as dilated cardiomyopathy and muscular dystrophy. Hence, development of drug candidates that inhibit human TRPV2 activation is an urgent matter. NK-4, a cryptocyanine dye, inhibited agonist-induced TRPV2 activity in mouse TRPV2-transfected HEK293 cells. However, it remains unclear whether NK-4 exerts regulatory effects on the activation of human TRPV2 channels. In this study, we show that NK-4 inhibits intracellular Ca
    MeSH term(s) Animals ; Calcium Channels/metabolism ; Cardiomyopathy, Dilated/etiology ; HEK293 Cells ; Humans ; Mice ; Muscular Dystrophies/complications ; TRPV Cation Channels/metabolism ; Urticaria/complications
    Chemical Substances Calcium Channels ; TRPV Cation Channels ; TRPV2 protein, human ; Trpv2 protein, mouse
    Language Japanese
    Publishing date 2022-02-28
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 200514-1
    ISSN 1347-5231 ; 0031-6903 ; 0372-7750 ; 0919-2085 ; 0919-2131
    ISSN (online) 1347-5231
    ISSN 0031-6903 ; 0372-7750 ; 0919-2085 ; 0919-2131
    DOI 10.1248/yakushi.21-00219
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Pharmacological inhibition of plasminogen activator inhibitor-1 prevents memory deficits and reduces neuropathology in APP/PS1 mice.

    Rodriguez, Guadalupe / Eren, Mesut / Haupfear, Isabel / Viola, Kirsten L / Cline, Erika N / Miyata, Toshio / Klein, William L / Vaughan, Douglas E / Dong, Hongxin

    Psychopharmacology

    2023  Volume 240, Issue 12, Page(s) 2641–2655

    Abstract: Rationale: Extracellular proteolytic activity plays an important role in memory formation and the preservation of cognitive function. Previous studies have shown increased levels of plasminogen activator inhibitor-1 (PAI-1) in the brain of mouse models ... ...

    Abstract Rationale: Extracellular proteolytic activity plays an important role in memory formation and the preservation of cognitive function. Previous studies have shown increased levels of plasminogen activator inhibitor-1 (PAI-1) in the brain of mouse models of Alzheimer's disease (AD) and plasma of AD patients, associated with memory and cognitive decline; however, the exact function of PAI-1 in AD onset and progression is largely unclear.
    Objective: In this study, we evaluated a novel PAI-1 inhibitor, TM5A15, on its ability to prevent or reverse memory deficits and decrease Aβ levels and plaque deposition in APP/PS1 mice.
    Methods: We administered TM5A15 mixed in a chow diet to 3-month and 9-month-old APP/PS1 mice before and after neuropathological changes were distinguishable. We then evaluated the effects of TM5A15 on memory function and neuropathology at 9 months and 18 months of age.
    Results: In the younger mice, 6 months of TM5A15 treatment protected against recognition and short-term working memory impairment. TM5A15 also decreased oligomer levels and amyloid plaques, and increased mBDNF expression in APP/PS1 mice at 9 months of age. In aged mice, 9 months of TM5A15 treatment did not significantly improve memory function nor decrease amyloid plaques. However, TM5A15 treatment showed a trend in decreasing oligomer levels in APP/PS1 mice at 18 months of age.
    Conclusion: Our results suggest that PAI-1 inhibition could improve memory function and reduce the accumulation of amyloid levels in APP/PS1 mice. Such effects are more prominent when TM5A15 is administered before advanced AD pathology and memory deficits occur.
    MeSH term(s) Mice ; Humans ; Animals ; Infant ; Amyloid beta-Peptides/metabolism ; Mice, Transgenic ; Plaque, Amyloid/metabolism ; Plasminogen Activator Inhibitor 1/metabolism ; Plasminogen Activator Inhibitor 1/therapeutic use ; Alzheimer Disease/metabolism ; Memory Disorders/drug therapy ; Memory Disorders/prevention & control ; Memory Disorders/complications ; Disease Models, Animal ; Amyloid beta-Protein Precursor/genetics ; Amyloid beta-Protein Precursor/metabolism ; Presenilin-1/genetics
    Chemical Substances Amyloid beta-Peptides ; Plasminogen Activator Inhibitor 1 ; Amyloid beta-Protein Precursor ; Presenilin-1
    Language English
    Publishing date 2023-09-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 130601-7
    ISSN 1432-2072 ; 0033-3158
    ISSN (online) 1432-2072
    ISSN 0033-3158
    DOI 10.1007/s00213-023-06459-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Cutaneous carcinomatous lymphangiosis mimicking angiosarcoma of the face possibly caused by salivary duct carcinoma.

    Takazawa, Maya / Demitsu, Toshio / Miyata, Toshiko / Kakurai, Maki / Tanaka, Akira / Umemoto, Naoka

    The Journal of dermatology

    2020  Volume 47, Issue 11, Page(s) e414–e415

    MeSH term(s) Carcinoma ; Hemangiosarcoma/diagnosis ; Humans ; Salivary Ducts ; Skin Neoplasms/diagnosis
    Language English
    Publishing date 2020-08-04
    Publishing country England
    Document type Letter
    ZDB-ID 800103-0
    ISSN 1346-8138 ; 0385-2407
    ISSN (online) 1346-8138
    ISSN 0385-2407
    DOI 10.1111/1346-8138.15531
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  7. Article ; Online: Structural Insight into the Two-Step Mechanism of PAI-1 Inhibition by Small Molecule TM5484.

    Sillen, Machteld / Miyata, Toshio / Vaughan, Douglas E / Strelkov, Sergei V / Declerck, Paul J

    International journal of molecular sciences

    2021  Volume 22, Issue 3

    Abstract: Plasminogen activator inhibitor-1 (PAI-1), a key regulator of the fibrinolytic system, is the main physiological inhibitor of plasminogen activators. By interacting with matrix components, including vitronectin (Vn), PAI-1 plays a regulatory role in ... ...

    Abstract Plasminogen activator inhibitor-1 (PAI-1), a key regulator of the fibrinolytic system, is the main physiological inhibitor of plasminogen activators. By interacting with matrix components, including vitronectin (Vn), PAI-1 plays a regulatory role in tissue remodeling, cell migration, and intracellular signaling. Emerging evidence points to a role for PAI-1 in various pathological conditions, including cardiovascular diseases, cancer, and fibrosis. Targeting PAI-1 is therefore a promising therapeutic strategy in PAI-1-related pathologies. A class of small molecule inhibitors including TM5441 and TM5484, designed to bind the cleft in the central β-sheet A of PAI-1, showed to be potent PAI-1 inhibitors in vivo. However, their binding site has not yet been confirmed. Here, we report two X-ray crystallographic structures of PAI-1 in complex with TM5484. The structures revealed a binding site at the flexible joint region, which is distinct from the presumed binding site. Based on the structural analysis and biochemical data we propose a mechanism for the observed dose-dependent two-step mechanism of PAI-1 inhibition. By binding to the flexible joint region in PAI-1, TM5484 might restrict the structural flexibility of this region, thereby inducing a substrate form of PAI-1 followed by a conversion to an inert form.
    MeSH term(s) Binding Sites ; Catalytic Domain ; Crystallization ; Crystallography, X-Ray ; Dose-Response Relationship, Drug ; Humans ; Models, Molecular ; Plasminogen Activator Inhibitor 1/chemistry ; Plasminogen Activator Inhibitor 1/drug effects ; Protein Conformation ; Structure-Activity Relationship
    Chemical Substances Plasminogen Activator Inhibitor 1 ; SERPINE1 protein, human
    Language English
    Publishing date 2021-02-02
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms22031482
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  8. Article ; Online: Inhibition of PAI-1 Promotes Lipolysis and Enhances Weight Loss in Obese Mice.

    Levine, Joshua A / Olivares, Shantel / Miyata, Toshio / Vaughan, Douglas E / Henkel, Anne S

    Obesity (Silver Spring, Md.)

    2021  Volume 29, Issue 4, Page(s) 713–720

    Abstract: Objective: This study investigates the therapeutic potential of a small molecule inhibitor of plasminogen activator inhibitor-1 (PAI-1), TM5441, in reversing diet-induced obesity in mice.: Methods: Wild-type C57BL/6J mice were fed a high-fat high- ... ...

    Abstract Objective: This study investigates the therapeutic potential of a small molecule inhibitor of plasminogen activator inhibitor-1 (PAI-1), TM5441, in reversing diet-induced obesity in mice.
    Methods: Wild-type C57BL/6J mice were fed a high-fat high-sugar (HFHS) diet for 8 weeks to induce obesity. After the first 8 weeks, TM5441 was added to the diet for an additional 8 weeks. In order to determine the efficacy of PAI-1 inhibition in conjunction with dietary modification, mice were fed an HFHS diet for 8 weeks to induce obesity and were then switched to a low-fat diet with or without TM5441 for an additional 2 to 8 weeks.
    Results: Obese mice showed weight reduction and significant improvement in hepatic steatosis when TM5441 was added to the HFHS diet. Obese mice that were treated with TM5441 in conjunction with dietary modification showed enhanced weight loss and a more rapid reversal of hepatic steatosis compared with obese mice treated with dietary modification alone. The enhanced weight loss among mice treated with TM5441 was associated with increased adipose tissue expression of adipose triglyceride lipase, phosphorylated hormone-sensitive lipase, and phosphorylated perilipin-1 as well as induction of adipose tissue lipolysis.
    Conclusions: Pharmacologic PAI-1 inhibition stimulates adipose tissue lipolysis and enhances weight loss in obese mice.
    MeSH term(s) Animals ; Lipolysis/physiology ; Male ; Mice ; Mice, Obese ; Plasminogen Activator Inhibitor 1/therapeutic use ; Weight Loss/drug effects
    Chemical Substances Plasminogen Activator Inhibitor 1
    Language English
    Publishing date 2021-02-16
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2230457-5
    ISSN 1930-739X ; 1071-7323 ; 1930-7381
    ISSN (online) 1930-739X
    ISSN 1071-7323 ; 1930-7381
    DOI 10.1002/oby.23112
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  9. Article ; Online: Pyridoxamine prevents increased atherosclerosis by intermittent methylglyoxal spikes in the aortic arches of ApoE

    Hanssen, Nordin M J / Tikellis, Chris / Pickering, Raelene J / Dragoljevic, Dragana / Lee, Man Kit Sam / Block, Tomasz / Scheijen, Jean Ljm / Wouters, Kristiaan / Miyata, Toshio / Cooper, Mark E / Murphy, Andrew J / Thomas, Merlin C / Schalkwijk, Casper G

    Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie

    2023  Volume 158, Page(s) 114211

    Abstract: Methylglyoxal (MGO) is a reactive glucose metabolite linked to diabetic cardiovascular disease (CVD). MGO levels surge during intermittent hyperglycemia. We hypothesize that these MGO spikes contribute to atherosclerosis, and that pyridoxamine as a MGO ... ...

    Abstract Methylglyoxal (MGO) is a reactive glucose metabolite linked to diabetic cardiovascular disease (CVD). MGO levels surge during intermittent hyperglycemia. We hypothesize that these MGO spikes contribute to atherosclerosis, and that pyridoxamine as a MGO quencher prevents this injury. To study this, we intravenously injected normoglycemic 8-week old male C57Bl6 ApoE
    MeSH term(s) Mice ; Male ; Animals ; Aorta, Thoracic/metabolism ; Pyridoxamine/pharmacology ; Pyruvaldehyde/metabolism ; Magnesium Oxide ; Atherosclerosis/prevention & control ; Apolipoproteins E
    Chemical Substances Pyridoxamine (6466NM3W93) ; Pyruvaldehyde (722KLD7415) ; Magnesium Oxide (3A3U0GI71G) ; Apolipoproteins E
    Language English
    Publishing date 2023-01-03
    Publishing country France
    Document type Journal Article
    ZDB-ID 392415-4
    ISSN 1950-6007 ; 0753-3322 ; 0300-0893
    ISSN (online) 1950-6007
    ISSN 0753-3322 ; 0300-0893
    DOI 10.1016/j.biopha.2022.114211
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  10. Article: Novel mechanisms and therapeutic options in diabetic nephropathy.

    Miyata, Toshio

    Polskie Archiwum Medycyny Wewnetrznej

    2009  Volume 119, Issue 4, Page(s) 261–264

    Abstract: Despite multiple therapeutic options, the incidence of diabetic nephropathy remains worrisome. Time has therefore come to undertake a new approach based on some breakthrough not only in medical biology but also in structural biology, chemistry, ... ...

    Abstract Despite multiple therapeutic options, the incidence of diabetic nephropathy remains worrisome. Time has therefore come to undertake a new approach based on some breakthrough not only in medical biology but also in structural biology, chemistry, pharmacology and even computer science. Recent investigations have tried to translate several target molecules or factors identified by basic researches into clinical medicine, as delineated in this. Classical factors contributing to the pathology of diabetic nephropathy, e.g., hypertension, hyperglycemia, hyperinsulinemia, and hyperlipidemia, are now amenable to treatment. Current therapies however do not fully prevent its renal complications. Recent studies, mainly performed in experimental animals, have identified newer culprits in the pathogenesis, such as hypoxia, advanced glycation, oxidative stress, and other bioactive molecules. Animal experiments highlight the fact that renoprotection is not necessarily linked to hemodymanic (blood pressure) or metabolic (glycemic and lipid controls) alterations but appears rather associated with an improved hypoxia, oxidative stress, and/or advanced glycation. To assess the respective contribution of each of these mediators, small molecular weight compounds were designed to interfere with each factor or target molecule. It is indeed important to acquire tools to evaluate and confirm our hypotheses and to translate experimental results into clinical practice.
    MeSH term(s) Animals ; Diabetic Nephropathies/drug therapy ; Diabetic Nephropathies/etiology ; Diabetic Nephropathies/physiopathology ; Diabetic Nephropathies/prevention & control ; Disease Models, Animal ; Humans ; Hypoxia/complications ; Hypoxia/physiopathology ; Kidney/blood supply ; Oxidative Stress ; Plasminogen Activator Inhibitor 1/therapeutic use ; Serpins/metabolism
    Chemical Substances Plasminogen Activator Inhibitor 1 ; SERPINB7 protein, human ; Serpins
    Language English
    Publishing date 2009-04
    Publishing country Poland
    Document type Journal Article
    ZDB-ID 123500-x
    ISSN 1897-9483 ; 1897-9483 ; 0032-3772
    ISSN (online) 1897-9483
    ISSN 1897-9483 ; 0032-3772
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