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  1. Article: Quantitative imaging mass spectroscopy reveals roles of heme oxygenase-2 for protecting against transhemispheric diaschisis in the brain ischemia.

    Goto, Shinichi / Morikawa, Takayuki / Kubo, Akiko / Takubo, Keiyo / Fukuda, Keiichi / Kajimura, Mayumi / Suematsu, Makoto

    Journal of clinical biochemistry and nutrition

    2018  Volume 63, Issue 1, Page(s) 70–79

    Abstract: Carbon monoxide-generating heme oxygenase-2 is expressed in neurons and plays a crucial role for regulating hypoxic vasodilation through mechanisms unlocking carbon monoxide-dependent inhibition of ... ...

    Abstract Carbon monoxide-generating heme oxygenase-2 is expressed in neurons and plays a crucial role for regulating hypoxic vasodilation through mechanisms unlocking carbon monoxide-dependent inhibition of H
    Language English
    Publishing date 2018-04-11
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 632945-7
    ISSN 1880-5086 ; 0912-0009
    ISSN (online) 1880-5086
    ISSN 0912-0009
    DOI 10.3164/jcbn.17-136
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Soluble Interleukin-2 Receptor Index Predicts Outcomes After Cord Blood Transplantation.

    Kajimura, Yasuko / Nakamura, Yukinori / Tanaka, Yoshinori / Tanaka, Mayumi / Yamamoto, Kaoru / Matsuguma, Masafumi / Tokunaga, Yoshihiro / Yujiri, Toshiaki / Tanizawa, Yukio

    Transplantation proceedings

    2020  Volume 53, Issue 1, Page(s) 379–385

    Abstract: Background: Our previous study demonstrated that the soluble interleukin-2 receptor (sIL-2R) index, defined as the ratio of serum sIL-2R levels at neutrophil engraftment to that before conditioning, is a biomarker that can predict acute graft-vs-host ... ...

    Abstract Background: Our previous study demonstrated that the soluble interleukin-2 receptor (sIL-2R) index, defined as the ratio of serum sIL-2R levels at neutrophil engraftment to that before conditioning, is a biomarker that can predict acute graft-vs-host disease (GVHD) after unrelated bone marrow transplantation. In the present study, we evaluated the significance of the sIL-2R index among patients who underwent cord blood transplantation (CBT).
    Methods: We retrospectively analyzed 31 patients who underwent single-unit CBT as their first transplantation for hematologic malignancies.
    Results: The median sIL-2R index was 4.2. The cumulative incidence of grade II to IV acute GVHD was not associated with the sIL-2R index. However, the cumulative incidence of relapse at 3 years after transplantation was significantly lower, with an sIL-2R index ≥ 3.7 than with an index < 3.7 (12.8% vs 50.0%; P = .04). As a result, the probability of overall survival at 3 years after transplantation was significantly higher in the former group than in the latter (79.8% vs 20.0%; P < .01). Only the dose of corticosteroid administered in the pre-engraftment period influenced the sIL-2 index.
    Conclusion: The sIL-2R index can predict the incidence of relapse and probability of survival after CBT, possibly reflecting a graft-vs-leukemia effect.
    MeSH term(s) Adult ; Biomarkers/blood ; Cord Blood Stem Cell Transplantation/adverse effects ; Cord Blood Stem Cell Transplantation/mortality ; Female ; Graft vs Host Disease/blood ; Graft vs Host Disease/epidemiology ; Graft vs Host Disease/etiology ; Hematologic Neoplasms/surgery ; Humans ; Incidence ; Male ; Middle Aged ; Neoplasm Recurrence, Local/blood ; Neoplasm Recurrence, Local/epidemiology ; Receptors, Interleukin-2/analysis ; Receptors, Interleukin-2/metabolism ; Retrospective Studies
    Chemical Substances Biomarkers ; Receptors, Interleukin-2
    Language English
    Publishing date 2020-05-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 82046-5
    ISSN 1873-2623 ; 0041-1345
    ISSN (online) 1873-2623
    ISSN 0041-1345
    DOI 10.1016/j.transproceed.2020.03.027
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  3. Article: 18

    Matsusaka, Yohji / Nakahara, Tadaki / Takahashi, Kazuhiro / Iwabuchi, Yu / Nishime, Chiyoko / Kajimura, Mayumi / Jinzaki, Masahiro

    EJNMMI research

    2017  Volume 7, Issue 1, Page(s) 19

    Abstract: Background: Red blood cells (RBCs) labeled with single-photon emitters have been clinically used for blood-pool imaging. Although some PET tracers have been introduced for blood-pool imaging, they have not yet been widely used. The present study ... ...

    Abstract Background: Red blood cells (RBCs) labeled with single-photon emitters have been clinically used for blood-pool imaging. Although some PET tracers have been introduced for blood-pool imaging, they have not yet been widely used. The present study investigated the feasibility of labeling RBCs with
    Results: The optimal durations of glucose deprivation and incubation (labeling) with
    Conclusions: RBCs can be effectively labeled with
    Language English
    Publishing date 2017-02-27
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2619892-7
    ISSN 2191-219X
    ISSN 2191-219X
    DOI 10.1186/s13550-017-0266-3
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  4. Article ; Online: Visualization and quantification of cerebral metabolic fluxes of glucose in awake mice.

    Sugiura, Yuki / Honda, Kurara / Kajimura, Mayumi / Suematsu, Makoto

    Proteomics

    2014  Volume 14, Issue 7-8, Page(s) 829–838

    Abstract: Biotransformation of glucose in organs includes multiple pathways, while quantitative evaluation of percentages of its utilization for individual pathways and their spatial heterogeneity in vivo remain unknown. Imaging MS (IMS) and metabolomics combined ... ...

    Abstract Biotransformation of glucose in organs includes multiple pathways, while quantitative evaluation of percentages of its utilization for individual pathways and their spatial heterogeneity in vivo remain unknown. Imaging MS (IMS) and metabolomics combined with a focused microwave irradiation for rapidly fixing tissue metabolism allowed us to quantify and visualize metabolic fluxes of glucose-derived metabolites in the mouse brain in vivo. At 15 min after the intraperitoneal injection of (13) C6 -labeled glucose, the mouse brain was exposed to focused microwave irradiation, which can stop brain metabolism within 1 s. Quantification of metabolic intermediates containing (13) C atoms revealed that a majority of the (13) C6 -glucose was diverted into syntheses of glutamate, lactate, and uridine diphosphate (UDP)-glucose. IMS showed that regions rich in glutaminergic neurons exhibited a large signal of (13) C2 -labeled glutamate. On the other hand, the midbrain region was enriched with an intensive (13) C6 -labeled UDP-glucose signal, suggesting an active glycogen synthesis. Collectively, application of the current method makes it possible to examine the fluxes of glucose metabolism in a region-specific manner.
    MeSH term(s) Animals ; Carbon Radioisotopes/chemistry ; Cranial Irradiation ; Glucose/metabolism ; Glutamic Acid/metabolism ; Glycogen/biosynthesis ; Magnetic Resonance Spectroscopy ; Mesencephalon/metabolism ; Mesencephalon/radiation effects ; Metabolomics ; Mice ; Microwaves ; Neurons/metabolism ; Neurons/radiation effects
    Chemical Substances Carbon Radioisotopes ; Glutamic Acid (3KX376GY7L) ; Glycogen (9005-79-2) ; Glucose (IY9XDZ35W2)
    Language English
    Publishing date 2014-04
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2032093-0
    ISSN 1615-9861 ; 1615-9853
    ISSN (online) 1615-9861
    ISSN 1615-9853
    DOI 10.1002/pmic.201300047
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  5. Article ; Online: TERT and JAK2 polymorphisms define genetic predisposition to myeloproliferative neoplasms in Japanese patients.

    Matsuguma, Masafumi / Yujiri, Toshiaki / Yamamoto, Kaoru / Kajimura, Yasuko / Tokunaga, Yoshihiro / Tanaka, Mayumi / Tanaka, Yoshinori / Nakamura, Yukinori / Tanizawa, Yukio

    International journal of hematology

    2019  Volume 110, Issue 6, Page(s) 690–698

    Abstract: Myeloproliferative neoplasms (MPNs), including polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF), are often characterized by specific somatic mutations in any of the three genes: JAK2, CALR, or MPL. A single ... ...

    Abstract Myeloproliferative neoplasms (MPNs), including polycythemia vera (PV), essential thrombocythemia (ET), and primary myelofibrosis (PMF), are often characterized by specific somatic mutations in any of the three genes: JAK2, CALR, or MPL. A single nucleotide polymorphism (SNP), rs2736100, in the reverse transcriptase gene (TERT) and a germline JAK2 46/1 haplotype have been associated with MPNs in North American and European patients. We examined 201 Japanese MPN patients, including 52 with PV, 131 with ET, and 18 with PMF, as well as 366 control individuals for TERT rs2736100 and JAK2 rs10974944, a tagging SNP of the 46/1 haplotype. Furthermore, correlations between the JAK2 V617F allele burden at diagnosis and TERT rs2736100 or JAK2 rs10974944 were evaluated using a digital PCR assay for accurate quantitation. The JAK2 46/1 haplotype, but not the TERT rs2736100 SNP, was correlated to the JAK2 V617F mutant allele burden in JAK2 V617F-positive MPN patients. In conclusion, we demonstrated that both TERT rs2736100_C and JAK2 46/1 haplotype are predisposing factors for MPNs in Japanese patients. While TERT rs2736100_C tended to have a more general, non-specific effect on all MPNs, the JAK2 46/1 haplotype was essentially predisposed to the JAK2 V617F-positive MPNs.
    MeSH term(s) Aged ; Case-Control Studies ; Female ; Genetic Predisposition to Disease ; Haplotypes ; Humans ; Janus Kinase 2/genetics ; Japan/epidemiology ; Male ; Middle Aged ; Myeloproliferative Disorders/genetics ; Polycythemia Vera/genetics ; Polymorphism, Genetic ; Primary Myelofibrosis/genetics ; Telomerase/genetics ; Thrombocythemia, Essential/genetics
    Chemical Substances JAK2 protein, human (EC 2.7.10.2) ; Janus Kinase 2 (EC 2.7.10.2) ; TERT protein, human (EC 2.7.7.49) ; Telomerase (EC 2.7.7.49)
    Language English
    Publishing date 2019-09-30
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1076875-0
    ISSN 1865-3774 ; 0917-1258 ; 0925-5710
    ISSN (online) 1865-3774
    ISSN 0917-1258 ; 0925-5710
    DOI 10.1007/s12185-019-02742-7
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  6. Article ; Online: Preclinical evaluation of heat-denatured [

    Matsusaka, Yohji / Nakahara, Tadaki / Takahashi, Kazuhiro / Iwabuchi, Yu / Ogata, Yuji / Nishime, Chiyoko / Kajimura, Mayumi / Jinzaki, Masahiro

    Nuclear medicine and biology

    2018  Volume 56, Page(s) 26–30

    Abstract: Introduction: Heat-denatured : Methods: RBCs were washed with phosphate buffered saline, labeled with [: Results: Labeling efficiency was 92%. Low levels of radioactivity were released from the labeled RBCs for 180 min. TLC revealed that 80% of ... ...

    Abstract Introduction: Heat-denatured
    Methods: RBCs were washed with phosphate buffered saline, labeled with [
    Results: Labeling efficiency was 92%. Low levels of radioactivity were released from the labeled RBCs for 180 min. TLC revealed that 80% of the released radioactivity was due to [
    Conclusions: Heat-denatured [
    MeSH term(s) Animals ; Drug Evaluation, Preclinical ; Erythrocytes/chemistry ; Erythrocytes/radiation effects ; Fluorodeoxyglucose F18/metabolism ; Hot Temperature ; Male ; Positron-Emission Tomography/methods ; Radiopharmaceuticals/metabolism ; Rats ; Rats, Inbred F344 ; Spleen/diagnostic imaging ; Spleen/metabolism
    Chemical Substances Radiopharmaceuticals ; Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2018-01
    Publishing country United States
    Document type Evaluation Studies ; Journal Article
    ZDB-ID 1138098-6
    ISSN 1872-9614 ; 0883-2897 ; 0969-8051
    ISSN (online) 1872-9614
    ISSN 0883-2897 ; 0969-8051
    DOI 10.1016/j.nucmedbio.2017.09.002
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  7. Article: Matrix-Assisted Laser Desorption/Ionization (MALDI) Imaging Mass Spectrometry (IMS): A Challenge for Reliable Quantitative Analyses.

    Kubo, Akiko / Kajimura, Mayumi / Suematsu, Makoto

    Mass spectrometry (Tokyo, Japan)

    2012  Volume 1, Issue 1, Page(s) A0004

    Abstract: Matrix-assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS) is capable of determining the distribution of hundreds of molecules at once directly from tissue sections. Since tissues are analyzed intact without homogenization, ... ...

    Abstract Matrix-assisted laser desorption/ionization (MALDI) imaging mass spectrometry (IMS) is capable of determining the distribution of hundreds of molecules at once directly from tissue sections. Since tissues are analyzed intact without homogenization, spatial relationships of molecules are preserved. The technology is, therefore, undoubtedly powerful to investigate the molecular complexity of biological processes. However, several technical refinements are essential for full exploitation of MALDI-IMS to dictate dynamics alteration of biomolecules in situ; these include ways to collect tissues, target-specific tissue pretreatment, matrix choice for efficient ionization, and matrix deposition method to improve imaging resolution. Furthermore, for MALDI-IMS to reach its full potential, quantitative property in the IMS should be strengthened. We review the challenges and new approaches for optimal imaging of proteins, lipids and metabolites, highlighting a novel quantitative IMS of energy metabolites in the recent literature.
    Language English
    Publishing date 2012-07-05
    Publishing country Japan
    Document type Journal Article ; Review
    ZDB-ID 2670439-0
    ISSN 2186-5116 ; 2187-137X
    ISSN (online) 2186-5116
    ISSN 2187-137X
    DOI 10.5702/massspectrometry.A0004
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  8. Article ; Online: Neuroprotective Role of Astroglia in Parkinson Disease by Reducing Oxidative Stress Through Dopamine-Induced Activation of Pentose-Phosphate Pathway.

    Mashima, Kyoko / Takahashi, Shinichi / Minami, Kazushi / Izawa, Yoshikane / Abe, Takato / Tsukada, Naoki / Hishiki, Takako / Suematsu, Makoto / Kajimura, Mayumi / Suzuki, Norihiro

    ASN neuro

    2018  Volume 10, Page(s) 1759091418775562

    Abstract: Oxidative stress plays an important role in the onset and progression of Parkinson disease. Although released dopamine at the synaptic terminal is mostly reabsorbed by dopaminergic neurons, some dopamine is presumably taken up by astroglia. This study ... ...

    Abstract Oxidative stress plays an important role in the onset and progression of Parkinson disease. Although released dopamine at the synaptic terminal is mostly reabsorbed by dopaminergic neurons, some dopamine is presumably taken up by astroglia. This study examined the dopamine-induced astroglial protective function through the activation of the pentose-phosphate pathway (PPP) to reduce reactive oxygen species (ROS). In vitro experiments were performed using striatal neurons and cortical or striatal astroglia prepared from Sprague-Dawley rats or C57BL/6 mice. The rates of glucose phosphorylation in astroglia were evaluated using the [
    MeSH term(s) Animals ; Astrocytes/drug effects ; Brain/cytology ; Cells, Cultured ; Coculture Techniques ; Dopamine/metabolism ; Dopamine/pharmacology ; Dose-Response Relationship, Drug ; Embryo, Mammalian ; Gene Expression Regulation/drug effects ; Gene Expression Regulation/genetics ; Glucose/metabolism ; Hydrogen Peroxide/pharmacology ; Lactates/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; NF-E2-Related Factor 2/deficiency ; NF-E2-Related Factor 2/genetics ; Neurons/drug effects ; Oxidative Stress/drug effects ; Pentose Phosphate Pathway/drug effects ; Rats ; Rats, Sprague-Dawley ; Reactive Oxygen Species
    Chemical Substances Lactates ; NF-E2-Related Factor 2 ; Nfe2l2 protein, mouse ; Reactive Oxygen Species ; Hydrogen Peroxide (BBX060AN9V) ; Glucose (IY9XDZ35W2) ; Dopamine (VTD58H1Z2X)
    Language English
    Publishing date 2018-08-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2485467-0
    ISSN 1759-0914 ; 1759-0914
    ISSN (online) 1759-0914
    ISSN 1759-0914
    DOI 10.1177/1759091418775562
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  9. Article ; Online: Visualization of in vivo metabolic flows reveals accelerated utilization of glucose and lactate in penumbra of ischemic heart.

    Sugiura, Yuki / Katsumata, Yoshinori / Sano, Motoaki / Honda, Kurara / Kajimura, Mayumi / Fukuda, Keiichi / Suematsu, Makoto

    Scientific reports

    2016  Volume 6, Page(s) 32361

    Abstract: Acute ischemia produces dynamic changes in labile metabolites. To capture snapshots of such acute metabolic changes, we utilized focused microwave treatment to fix metabolic flow in vivo in hearts of mice 10 min after ligation of the left anterior ... ...

    Abstract Acute ischemia produces dynamic changes in labile metabolites. To capture snapshots of such acute metabolic changes, we utilized focused microwave treatment to fix metabolic flow in vivo in hearts of mice 10 min after ligation of the left anterior descending artery. The left ventricle was subdivided into short-axis serial slices and the metabolites were analyzed by capillary electrophoresis mass spectrometry and matrix-assisted laser desorption/ionization imaging mass spectrometry. These techniques allowed us to determine the fate of exogenously administered (13)C6-glucose and (13)C3-lactate. The penumbra regions, which are adjacent to the ischemic core, exhibited the greatest adenine nucleotide energy charge and an adenosine overflow extending from the ischemic core, which can cause ischemic hyperemia. Imaging analysis of metabolic pathway flows revealed that the penumbra executes accelerated glucose oxidation, with remaining lactate utilization for tricarboxylic acid cycle for energy compensation, suggesting unexpected metabolic interplays of the penumbra with the ischemic core and normoxic regions.
    MeSH term(s) Animals ; Carbon Isotopes ; Glucose/metabolism ; Glutamic Acid/metabolism ; Lactic Acid/metabolism ; Male ; Metabolic Networks and Pathways ; Metabolome ; Mice, Inbred C57BL ; Microwaves ; Myocardial Ischemia/metabolism
    Chemical Substances Carbon Isotopes ; Lactic Acid (33X04XA5AT) ; Glutamic Acid (3KX376GY7L) ; Glucose (IY9XDZ35W2)
    Language English
    Publishing date 2016--01
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/srep32361
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  10. Article ; Online: CO-CBS-H2 S Axis: From Vascular Mediator to Cancer Regulator.

    Suematsu, Makoto / Nakamura, Takashi / Tokumoto, Yasuhito / Yamamoto, Takehiro / Kajimura, Mayumi / Kabe, Yasuaki

    Microcirculation (New York, N.Y. : 1994)

    2016  Volume 23, Issue 3, Page(s) 183–190

    Abstract: CO is a gaseous mediator generated by HO. Our previous studies revealed that CO generated from inducible HO-1 or from constitutive HO-2 modulates function of different heme proteins or enzymes through binding to their prosthetic ferrous heme to alter ... ...

    Abstract CO is a gaseous mediator generated by HO. Our previous studies revealed that CO generated from inducible HO-1 or from constitutive HO-2 modulates function of different heme proteins or enzymes through binding to their prosthetic ferrous heme to alter their structures, regulating biological function of cells and organs. Such CO-directed target macromolecules include sGC and CBS. In the liver, CO serves as a sinusoidal dilator through its action on sGC in hepatic stellate cells, while the same gas accounts for vasoconstrictor that inhibits H2S generated by CO-sensitive CBS in astrocytes. Since molecular O2 is a substrate for HO, the latter mechanism contributes to hypoxic vasodilation in neurovascular units. We have recently uncovered that stress-inducible CO in and around cancer cells suppresses CBS to result in decreased methylation of PFKFB3, the enzyme regulating PFK-1, leading to a shift of glucose biotransformation from glycolysis toward pentose phosphate pathway; such a metabolic remodeling causes chemoresistance through increasing NADPH and reduced glutathione under stress conditions for cancer cells. This article reviews the intriguing networks of CO-sensitive metabolic regulatory mechanisms in microcirculation and cancer.
    MeSH term(s) Animals ; Capillaries/metabolism ; Capillaries/pathology ; Carbon Monoxide/metabolism ; Cystathionine beta-Synthase/metabolism ; Heme Oxygenase (Decyclizing)/metabolism ; Heme Oxygenase-1/metabolism ; Humans ; Hydrogen Sulfide/metabolism ; Kupffer Cells/metabolism ; Kupffer Cells/pathology ; Liver/metabolism ; Liver/pathology ; Liver Neoplasms/metabolism ; Liver Neoplasms/pathology ; Neoplasm Proteins/metabolism ; Synaptic Transmission
    Chemical Substances Neoplasm Proteins ; Carbon Monoxide (7U1EE4V452) ; HMOX1 protein, human (EC 1.14.14.18) ; Heme Oxygenase (Decyclizing) (EC 1.14.14.18) ; Heme Oxygenase-1 (EC 1.14.14.18) ; heme oxygenase-2 (EC 1.14.14.18) ; Cystathionine beta-Synthase (EC 4.2.1.22) ; Hydrogen Sulfide (YY9FVM7NSN)
    Language English
    Publishing date 2016-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1217758-1
    ISSN 1549-8719 ; 1073-9688
    ISSN (online) 1549-8719
    ISSN 1073-9688
    DOI 10.1111/micc.12253
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