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  1. Article: Case report: An N-of-1 study using amplitude modulated transcranial alternating current stimulation between Broca's area and the right homotopic area to improve post-stroke aphasia with increased inter-regional synchrony.

    Omae, Erika / Shima, Atsushi / Tanaka, Kazuki / Yamada, Masako / Cao, Yedi / Nakamura, Tomoyuki / Hoshiai, Hajime / Chiba, Yumi / Irisawa, Hiroshi / Mizushima, Takashi / Mima, Tatsuya / Koganemaru, Satoko

    Frontiers in human neuroscience

    2024  Volume 18, Page(s) 1297683

    Abstract: ... function in a case of chronic post-stroke aphasia. According to an N-of-1 study design, the patient ...

    Abstract Over one-third of stroke survivors develop aphasia, and language dysfunction persists for the remainder of their lives. Brain language network changes in patients with aphasia. Recently, it has been reported that phase synchrony within a low beta-band (14-19 Hz) frequency between Broca's area and the homotopic region of the right hemisphere is positively correlated with language function in patients with subacute post-stroke aphasia, suggesting that synchrony is important for language recovery. Here, we employed amplitude-modulated transcranial alternating current stimulation (AM-tACS) to enhance synchrony within the low beta band frequency between Broca's area and the right homotopic area, and to improve language function in a case of chronic post-stroke aphasia. According to an N-of-1 study design, the patient underwent short-term intervention with a one-time intervention of 15 Hz-AM-tACS with Broca's and the right homotopic areas (real condition), sham stimulation (sham condition), and 15 Hz-AM-tACS with Broca's and the left parietal areas (control condition) and long-term intervention with sham and real conditions (10 sessions in total, each). In the short-term intervention, the reaction time and accuracy rate of the naming task improved after real condition, not after sham and control conditions. The synchrony between the stimulated areas evaluated by coherence largely increased after the real condition. In the long-term intervention, naming ability, verbal fluency and overall language function improved, with the increase in the synchrony, and those improvements were sustained for more than a month after real condition. This suggests that AM-tACS on Broca's area and the right homotopic areas may be a promising therapeutic approach for patients with poststroke aphasia.
    Language English
    Publishing date 2024-02-22
    Publishing country Switzerland
    Document type Case Reports
    ZDB-ID 2425477-0
    ISSN 1662-5161
    ISSN 1662-5161
    DOI 10.3389/fnhum.2024.1297683
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Promotion of wound healing by acetate in murine colonic epithelial cell via c-Jun N-terminal kinase activation.

    Nakano, Takahiro / Uchiyama, Kazuhiko / Ushiroda, Chihiro / Kashiwagi, Saori / Toyokawa, Yuki / Mizushima, Katsura / Inoue, Ken / Dohi, Osamu / Okayama, Tetsuya / Yoshida, Naohisa / Katada, Kazuhiro / Kamada, Kazuhiro / Handa, Osamu / Ishikawa, Takeshi / Takagi, Tomohisa / Konishi, Hideyuki / Naito, Yuji / Itoh, Yoshito

    Journal of gastroenterology and hepatology

    2020  Volume 35, Issue 7, Page(s) 1171–1179

    Abstract: ... These effects were canceled with pretreatment of c-Jun N-terminal kinase (JNK) inhibitor or Rho kinase inhibitor ...

    Abstract Background and aim: Mucosal healing is an important clinical goal in patients with inflammatory bowel disease. Recently, short-chain fatty acids (SCFAs) have been reported to have multifaceted effects to host. However, the effects of SCFAs on wound healing in intestinal epithelial cells are unclear. In the present study, we investigated the effects of acetate, one of the major SCFAs, on the wound healing of murine colonic epithelial cells.
    Methods: Young adult mouse colonic epithelial cells were used to determine the effect of acetate using wound healing assay. Mitogen-activated protein kinase and Rho kinase inhibitor were used to elucidate intracellular signal of wound healing treated with acetate. Meanwhile, Rho activation assays were utilized to measure Rho activation levels. To assess in vivo effects, C57B6 mice with dextran sodium sulfate for 7 days were treated with enema administration of acetate for 7 days. Body weight, disease activity index, colon length, and mucosal break ratio in histology were examined.
    Results: Acetate enhanced wound healing and fluorescence intensity of actin stress fiber compared with control. These effects were canceled with pretreatment of c-Jun N-terminal kinase (JNK) inhibitor or Rho kinase inhibitor. Furthermore, JNK inhibitor reduced the activation of Rho induced by acetate. In the dextran sodium sulfate-induced colitis model, the mice with enema treatment of acetate significantly exhibited recovery.
    Conclusions: In this study, we demonstrated that acetate promoted murine colonic epithelial cell wound healing via activation of JNK and Rho signaling pathways. These findings suggested that acetate could have applications as a therapeutic agent for patients with intestinal mucosal damage, such as inflammatory bowel disease.
    MeSH term(s) Acetates/administration & dosage ; Acetates/pharmacology ; Acetates/therapeutic use ; Animals ; Cells, Cultured ; Colitis/drug therapy ; Colon/cytology ; Disease Models, Animal ; Epithelial Cells/pathology ; Fatty Acids, Volatile/pharmacology ; Fatty Acids, Volatile/therapeutic use ; JNK Mitogen-Activated Protein Kinases/metabolism ; MAP Kinase Signaling System/drug effects ; MAP Kinase Signaling System/genetics ; Male ; Mice, Inbred C57BL ; Wound Healing/drug effects ; Wound Healing/genetics ; rho-Associated Kinases/metabolism
    Chemical Substances Acetates ; Fatty Acids, Volatile ; rho-Associated Kinases (EC 2.7.11.1) ; JNK Mitogen-Activated Protein Kinases (EC 2.7.11.24)
    Language English
    Publishing date 2020-02-06
    Publishing country Australia
    Document type Journal Article
    ZDB-ID 632882-9
    ISSN 1440-1746 ; 0815-9319
    ISSN (online) 1440-1746
    ISSN 0815-9319
    DOI 10.1111/jgh.14987
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Effects of temperature alteration on viscosity, polymerization, and in-vivo arterial distribution of N-butyl cyanoacrylate-iodized oil mixtures.

    Mine, Takahiko / Yasui, Daisuke / Saito, Hidemasa / Ueda, Tatsuo / Yokoyama, Taro / Ikeda, Shinpei / Mizushima, Shohei / Happoh, Seigoh / Kumita, Shin-Ichiro

    Japanese journal of radiology

    2021  Volume 39, Issue 11, Page(s) 1111–1118

    Abstract: Purpose: Temperature alteration can modify the polymerization of n-butyl cyanoacrylate (NBCA ...

    Abstract Purpose: Temperature alteration can modify the polymerization of n-butyl cyanoacrylate (NBCA)-iodized oil mixtures during vascular embolization; its effects on viscosity, polymerization time, and intra-arterial distribution of the NBCA-iodized oil mixture were investigated.
    Materials and methods: In vitro, the viscosities of NBCA, iodized oil, and NBCA-iodized oil mixtures (ratio, 1:1-8) were measured at 4-60 ºC using a rotational rheometer. The polymerization times (from contact with blood plasma to stasis) were recorded at 0-60 ºC using a high-speed video camera. In vivo, the 1:2 mixture was injected into rabbit renal arteries at 0, 20, and 60 ºC; intra-arterial distribution of the mixture was pathologically evaluated.
    Results: The mixtures' viscosities decreased as temperature increased; those at 60 ºC were almost four to five times lower than those at 4 ºC. The polymerization time of NBCA and the 1:1-4 mixtures increased as temperature decreased in the 0-30 ºC range; the degree of time prolongation increased as the percentage of iodized oil decreased. The 0 ºC group demonstrated distributions of the mixture within more peripheral arterial branches than the 20 and 60 ºC groups.
    Conclusion: Warming reduces the mixture's viscosity; cooling prolongs polymerization. Both can be potential factors to improve the handling of NBCA-iodized oil mixtures for lesions requiring peripheral delivery. Temperature alteration influences the polymerization time, viscosity, and intra-arterial distribution of NBCA-iodized oil mixtures. Warming reduces the viscosity of the mixture, while cooling prolongs polymerization.
    MeSH term(s) Animals ; Embolization, Therapeutic ; Enbucrilate ; Iodized Oil ; Polymerization ; Rabbits ; Temperature ; Viscosity
    Chemical Substances Iodized Oil (8001-40-9) ; Enbucrilate (F8CEP82QNP)
    Language English
    Publishing date 2021-06-09
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 2488907-6
    ISSN 1867-108X ; 1867-1071
    ISSN (online) 1867-108X
    ISSN 1867-1071
    DOI 10.1007/s11604-021-01143-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Ubiquitin in autophagy and non-protein ubiquitination.

    Mizushima, Noboru

    Nature structural & molecular biology

    2024  Volume 31, Issue 2, Page(s) 208–209

    MeSH term(s) Ubiquitin/metabolism ; Ubiquitination ; Signal Transduction ; Autophagy ; Ubiquitin-Protein Ligases/metabolism
    Chemical Substances Ubiquitin ; Ubiquitin-Protein Ligases (EC 2.3.2.27)
    Language English
    Publishing date 2024-02-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2126708-X
    ISSN 1545-9985 ; 1545-9993
    ISSN (online) 1545-9985
    ISSN 1545-9993
    DOI 10.1038/s41594-024-01217-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Altered perception might be a symptom of anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis.

    Funayama, Michitaka / Mizushima, Jin / Takata, Taketo / Koreki, Akihiro / Mimura, Masaru

    Neurocase

    2019  Volume 24, Issue 5-6, Page(s) 255–258

    Abstract: Most patients with N-methyl-D-aspartate receptor (NMDAR) encephalitis initially present ...

    Abstract Most patients with N-methyl-D-aspartate receptor (NMDAR) encephalitis initially present with psychiatric symptoms. Although a delayed diagnosis may lead to a poor outcome, psychiatric symptoms that could differentiate anti-NMDAR encephalitis from other psychoses have not been fully investigated. We evaluated two patients with anti-NMDAR encephalitis who were observed by psychiatrists from onset throughout the course of disease. Both patients exhibited disorientation, memory deficits, perceptual disturbances, hallucinations, and mood liability. Among those, altered perceptions were most prominent - in particular, altered time perceptions without disorganization syndrome. The information obtained for these patients may help clinicians differentiate anti-NMDAR encephalitis from other psychoses, e.g., schizophrenia.
    MeSH term(s) Adult ; Anti-N-Methyl-D-Aspartate Receptor Encephalitis/complications ; Anti-N-Methyl-D-Aspartate Receptor Encephalitis/physiopathology ; Confusion/etiology ; Confusion/physiopathology ; Female ; Humans ; Memory Disorders/etiology ; Memory Disorders/physiopathology ; Perceptual Disorders/etiology ; Perceptual Disorders/physiopathology ; Time Perception/physiology
    Language English
    Publishing date 2019-01-25
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 1302651-3
    ISSN 1465-3656 ; 1355-4794
    ISSN (online) 1465-3656
    ISSN 1355-4794
    DOI 10.1080/13554794.2019.1573260
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Increased N-Acetyltaurine in the Skeletal Muscle After Endurance Exercise in Rat.

    Miyazaki, Teruo / Nakamura, Yuho / Ebina, Kei / Mizushima, Takaki / Ra, Song-Gyu / Ishikura, Keisuke / Matsuzaki, Yasushi / Ohmori, Hajime / Honda, Akira

    Advances in experimental medicine and biology

    2017  Volume 975 Pt 1, Page(s) 403–411

    Abstract: Taurine is metabolized to a novel metabolite, N-acetyltaurine (NAT), through N-acetylation ...

    Abstract Taurine is metabolized to a novel metabolite, N-acetyltaurine (NAT), through N-acetylation with acetate. Furthermore, NAT production increases when the endogenous production of acetate is elevated in some situations, such as alcohol catabolism and endurance exercise. We have previously reported that both the serum concentration and urinary excretion of NAT from humans were increased after endurance exercise, and that NAT was secreted by cultured skeletal muscle cells exposed to both acetate and taurine. The present study evaluated the hypothesis that NAT is synthesized in the skeletal muscle after endurance exercise. Normal rats were loaded to a transient treadmill running until exhaustion. Serum, skeletal muscle, and liver were collected immediately after the exercise. The NAT concentration in the plasma and in the soleus muscle from the exercised rats was significantly increased compared to that in the samples from the sedentary control rats. There was a significant positive correlation in the NAT concentration between the plasma and soleus muscle. The NAT concentration in the liver was unchanged after the endurance exercise. These results confirm that the significantly increased NAT in both the serum and urine after endurance exercise is derived from NAT synthesis in the skeletal muscle.
    MeSH term(s) Animals ; Male ; Muscle, Skeletal/metabolism ; Physical Conditioning, Animal/physiology ; Physical Endurance/physiology ; Rats ; Rats, Inbred F344 ; Taurine/analogs & derivatives ; Taurine/metabolism
    Chemical Substances acetyltaurine (19213-70-8) ; Taurine (1EQV5MLY3D)
    Language English
    Publishing date 2017-08-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 410187-X
    ISSN 0065-2598
    ISSN 0065-2598
    DOI 10.1007/978-94-024-1079-2_33
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  7. Article: Raman frequencies of n-paraffin molecules.

    MIZUSHIMA, S I / SIMANOUTI, T

    Journal of the American Chemical Society

    2007  Volume 71, Issue 4, Page(s) 1320–1324

    MeSH term(s) Humans ; Paraffin
    Chemical Substances Paraffin (8002-74-2)
    Language English
    Publishing date 2007-10-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/ja01172a050
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  8. Article ; Online: SnapShot: Organelle degradation.

    Mizushima, Noboru

    Molecular cell

    2022  Volume 82, Issue 8, Page(s) 1604–1604.e1

    Abstract: Organelles are continuously turned over as part of cellular homeostasis and adaptation. Most organelles, even including the nucleus, are degraded by lysosomes via different pathways, such as macroautophagy, microautophagy, organelle-derived vesicle ... ...

    Abstract Organelles are continuously turned over as part of cellular homeostasis and adaptation. Most organelles, even including the nucleus, are degraded by lysosomes via different pathways, such as macroautophagy, microautophagy, organelle-derived vesicle degradation, and crinophagy. In some specific cases-for example, in lens fiber cells-organelles are degraded by cytosolic phospholipases. To view this SnapShot, open or download the PDF.
    MeSH term(s) Autophagy ; Cytosol ; Lens, Crystalline/metabolism ; Lysosomes ; Organelles/metabolism
    Language English
    Publishing date 2022-04-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1415236-8
    ISSN 1097-4164 ; 1097-2765
    ISSN (online) 1097-4164
    ISSN 1097-2765
    DOI 10.1016/j.molcel.2022.03.015
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  9. Article ; Online: N-terminal α7 deletion of the proteasome 20S core particle substitutes for yeast PI31 function.

    Yashiroda, Hideki / Toda, Yousuke / Otsu, Saori / Takagi, Kenji / Mizushima, Tsunehiro / Murata, Shigeo

    Molecular and cellular biology

    2014  Volume 35, Issue 1, Page(s) 141–152

    Abstract: ... deleted. The lethality of Δfub1 Δpba4 was suppressed by deletion of the N terminus of α7 (α7ΔN), which led ... to the partial activation of the CP. However, deletion of the N terminus of α3, which activates the CP more ... that the α7 N terminus has a role in CP activation different from that of the α3 N terminus and that the role ...

    Abstract The proteasome core particle (CP) is a conserved protease complex that is formed by the stacking of two outer α-rings and two inner β-rings. The α-ring is a heteroheptameric ring of subunits α1 to α7 and acts as a gate that restricts entry of substrate proteins into the catalytic cavity formed by the two abutting β-rings. The 31-kDa proteasome inhibitor (PI31) was originally identified as a protein that binds to the CP and inhibits CP activity in vitro, but accumulating evidence indicates that PI31 is required for physiological proteasome activity. To clarify the in vivo role of PI31, we examined the Saccharomyces cerevisiae PI31 ortholog Fub1. Fub1 was essential in a situation where the CP assembly chaperone Pba4 was deleted. The lethality of Δfub1 Δpba4 was suppressed by deletion of the N terminus of α7 (α7ΔN), which led to the partial activation of the CP. However, deletion of the N terminus of α3, which activates the CP more efficiently than α7ΔN by gate opening, did not suppress Δfub1 Δpba4 lethality. These results suggest that the α7 N terminus has a role in CP activation different from that of the α3 N terminus and that the role of Fub1 antagonizes a specific function of the α7 N terminus.
    MeSH term(s) Alleles ; Crystallography, X-Ray ; Gene Deletion ; Genetic Complementation Test ; Glycerol/chemistry ; Heterozygote ; Mutation ; Plasmids/metabolism ; Proteasome Endopeptidase Complex/genetics ; Proteasome Endopeptidase Complex/metabolism ; Proteasome Endopeptidase Complex/physiology ; Protein Binding ; Protein Structure, Tertiary ; Saccharomyces cerevisiae/genetics ; Saccharomyces cerevisiae/metabolism ; Saccharomyces cerevisiae Proteins/metabolism
    Chemical Substances Fub1 protein, S cerevisiae ; Saccharomyces cerevisiae Proteins ; Proteasome Endopeptidase Complex (EC 3.4.25.1) ; Glycerol (PDC6A3C0OX)
    Language English
    Publishing date 2014-10-20
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 779397-2
    ISSN 1098-5549 ; 0270-7306
    ISSN (online) 1098-5549
    ISSN 0270-7306
    DOI 10.1128/MCB.00582-14
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  10. Article ; Online: Backbone ¹H, ¹³C and ¹⁵N assignments of yeast Ump1, an intrinsically disordered protein that functions as a proteasome assembly chaperone.

    Uekusa, Yoshinori / Okawa, Keisuke / Yagi-Utsumi, Maho / Serve, Olivier / Nakagawa, Yuki / Mizushima, Tsunehiro / Yagi, Hirokazu / Saeki, Yasushi / Tanaka, Keiji / Kato, Koichi

    Biomolecular NMR assignments

    2014  Volume 8, Issue 2, Page(s) 383–386

    Abstract: Eukaryotic proteasome assembly is a highly organized process mediated by several proteasome-specific chaperones, which interact with proteasome assembly intermediates. In yeast, Ump1 and Pba1-4 have been identified as assembly chaperones that are ... ...

    Abstract Eukaryotic proteasome assembly is a highly organized process mediated by several proteasome-specific chaperones, which interact with proteasome assembly intermediates. In yeast, Ump1 and Pba1-4 have been identified as assembly chaperones that are dedicated to the formation of the proteasome 20S catalytic core complex. The crystal structures of Pba chaperones have been reported previously, but no detailed information has been provided for the structure of Ump1. Thus, to better understand the mechanisms underlying Ump1-mediated proteasome assembly, we characterized the conformation of Ump1 in solution using NMR. Backbone chemical shift data indicated that Ump1 is an intrinsically unstructured protein and largely devoid of secondary structural elements.
    MeSH term(s) Intrinsically Disordered Proteins/chemistry ; Intrinsically Disordered Proteins/metabolism ; Molecular Chaperones/chemistry ; Molecular Chaperones/metabolism ; Nuclear Magnetic Resonance, Biomolecular ; Proteasome Endopeptidase Complex/metabolism ; Saccharomyces cerevisiae
    Chemical Substances Intrinsically Disordered Proteins ; Molecular Chaperones ; proteasome maturation protein ; Proteasome Endopeptidase Complex (EC 3.4.25.1)
    Language English
    Publishing date 2014-10
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2388861-1
    ISSN 1874-270X ; 1874-2718
    ISSN (online) 1874-270X
    ISSN 1874-2718
    DOI 10.1007/s12104-013-9523-1
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