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  1. Article: N

    Karanjule, Narayan / Hayashi, Noriyuki / Suzuki, Sayaka / Tsuda, Toshifumi / Tokumaru, Eri / Tanaka, Kyosuke / Kimoto, Hiroko / Domon, Yuki / Takahashi, Sakiko / Kubota, Kazufumi / Kitano, Yutaka / Yokoyama, Tomihisa / Koishi, Ryuta / Fujiwara, Chie / Inaba, Shinichi / Asano, Daigo / Sakakura, Tomoko / Takasuna, Kiyoshi / Shinozuka, Tsuyoshi

    ACS medicinal chemistry letters

    2023  Volume 14, Issue 6, Page(s) 788–793

    Abstract: A novel class of potent ... ...

    Abstract A novel class of potent Na
    Language English
    Publishing date 2023-05-24
    Publishing country United States
    Document type Journal Article
    ISSN 1948-5875
    ISSN 1948-5875
    DOI 10.1021/acsmedchemlett.3c00079
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: N

    Kida, Tatsuya / Takahashi, Nobuaki / Mori, Masayuki X / Sun, Jiacheng H / Oota, Hideto / Nishino, Kosuke / Okauchi, Takashi / Ochi, Yuta / Kano, Daisuke / Tateishi, Ukihide / Watanabe, Yasuyoshi / Cui, Yilong / Mori, Yasuo / Doi, Hisashi

    RSC medicinal chemistry

    2022  Volume 13, Issue 10, Page(s) 1197–1204

    Abstract: Transient receptor potential cation channel subfamily V member 1 (TRPV1)-targeted compounds were synthesized by modifying the structure of SB366791, a pharmaceutically representative TRPV1 antagonist. To avoid amide-iminol tautomerization, structurally ... ...

    Abstract Transient receptor potential cation channel subfamily V member 1 (TRPV1)-targeted compounds were synthesized by modifying the structure of SB366791, a pharmaceutically representative TRPV1 antagonist. To avoid amide-iminol tautomerization, structurally supported
    Language English
    Publishing date 2022-09-06
    Publishing country England
    Document type Journal Article
    ISSN 2632-8682
    ISSN (online) 2632-8682
    DOI 10.1039/d2md00158f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Dissolved N

    Nishina, Kazuya / Melling, Lulie / Toyoda, Sakae / Itoh, Masayuki / Terajima, Kotaro / Waili, Joseph W B / Wong, Guan X / Kiew, Frankie / Aeries, Edward B / Hirata, Ryuichi / Takahashi, Yoshiyuki / Onodera, Takashi

    The Science of the total environment

    2023  Volume 872, Page(s) 162062

    Abstract: ... ecosystems have a unique water management system that lowers the water table and, thus, may yield indirect N ...

    Abstract Oil palm plantations in Southeast Asia are the largest supplier of palm oil products and have been rapidly expanding in the last three decades even in peat-swamp areas. Oil palm plantations on peat ecosystems have a unique water management system that lowers the water table and, thus, may yield indirect N
    Language English
    Publishing date 2023-02-16
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.162062
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  4. Article ; Online: Synthesis of a fluorescent probe for measuring the activity of endo-β-N-acetylglucosaminidases recognizing hybrid-type N-glycans.

    Ishii, Nozomi / Inoue, Shusei / Sano, Kanae / Takahashi, Satoshi / Matsuo, Ichiro

    Bioorganic & medicinal chemistry

    2024  Volume 100, Page(s) 117612

    Abstract: ... of endo-β-N-acetylglucosaminidases (ENGases) interacting with hybrid-type N-glycans. This was achieved ... of the resulting nonasaccharide derivative were removed, and the derivative was labeled with an N ... could also assist in the search for novel ENGases that are specific to hybrid-type N-glycans. ...

    Abstract A fluorescence-quenching-based assay system was constructed to determine the hydrolytic activity of endo-β-N-acetylglucosaminidases (ENGases) interacting with hybrid-type N-glycans. This was achieved using a dual-labeled fluorescent probe with a nonasaccharide structure. We produced the nonasaccharide skeleton by the stepwise glycosylation of the galactose residue on a galactosyl chitobiose derivative. Next, we introduced azido and acetoxy groups into the nonasaccharide derivative in a stepwise manner, which led to stereochemistry inversion at both the C-4 and C-2 hydroxy groups on its galactose residue. The protecting groups of the resulting nonasaccharide derivative were removed, and the derivative was labeled with an N-methylanthraniloyl group to obtain a reporter dye and a 2,4-dinitrophenyl group as a quenching molecule to obtain target probe 1. The use of this probe along with a microplate reader enabled a facile evaluation of the hydrolytic activities of ENGases Endo-H, Endo-M, Endo-F3, Endo-S, and Endo-CC. Furthermore, this probe could also assist in the search for novel ENGases that are specific to hybrid-type N-glycans.
    MeSH term(s) Fluorescent Dyes/chemistry ; Acetylglucosaminidase/chemistry ; Galactose ; Polysaccharides/chemistry ; Glycosylation ; Mannosyl-Glycoprotein Endo-beta-N-Acetylglucosaminidase/metabolism
    Chemical Substances Fluorescent Dyes ; Acetylglucosaminidase (EC 3.2.1.52) ; Galactose (X2RN3Q8DNE) ; Polysaccharides ; Mannosyl-Glycoprotein Endo-beta-N-Acetylglucosaminidase (EC 3.2.1.96)
    Language English
    Publishing date 2024-01-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1161284-8
    ISSN 1464-3391 ; 0968-0896
    ISSN (online) 1464-3391
    ISSN 0968-0896
    DOI 10.1016/j.bmc.2024.117612
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: N-glycan on N262 of FGFR3 regulates the intracellular localization and phosphorylation of the receptor.

    Hashimoto, Ukichiro / Fujitani, Naoki / Uehara, Yasuaki / Okamoto, Hiromi / Saitou, Atsushi / Ito, Fumie / Ariki, Shigeru / Shiratsuchi, Akiko / Hasegawa, Yoshihiro / Takahashi, Motoko

    Biochimica et biophysica acta. General subjects

    2024  Volume 1868, Issue 4, Page(s) 130565

    Abstract: N-glycosylation and proper processing of N-glycans are required for the function ... cell proliferation. Human FGFR3 contains six potential N-glycosylation sites, however, the roles of glycosylation ... have not been elucidated. The site-specific profiles of N-glycans of the FGFR3 extracellular domain ...

    Abstract N-glycosylation and proper processing of N-glycans are required for the function of membrane proteins including cell surface receptors. Fibroblast growth factor receptor (FGFR) is involved in a wide variety of biological processes including embryonic development, osteogenesis, angiogenesis, and cell proliferation. Human FGFR3 contains six potential N-glycosylation sites, however, the roles of glycosylation have not been elucidated. The site-specific profiles of N-glycans of the FGFR3 extracellular domain expressed and secreted by CHO-K1 cells were examined, and glycan occupancies and structures of four sites were determined. The results indicated that most sites were fully occupied by glycans, and the dominant populations were the complex type. By examining single N-glycan deletion mutants of FGFR3, it was found that N262Q mutation significantly increased the population with oligomannose-type N-glycans, which was localized in the endoplasmic reticulum. Protein stability assay suggested that fraction with oligomannose-type N-glycans in the N262Q mutant is more stable than those in the wild type and other mutants. Furthermore, it was found that ligand-independent phosphorylation was significantly upregulated in N262Q mutants with complex type N-glycans. The findings suggest that N-glycans on N262 of FGFR3 affect the intracellular localization and phosphorylation status of the receptor.
    MeSH term(s) Cricetinae ; Animals ; Humans ; Phosphorylation ; Glycosylation ; CHO Cells ; Cricetulus ; Polysaccharides/metabolism ; Biological Phenomena ; Receptor, Fibroblast Growth Factor, Type 3/genetics ; Receptor, Fibroblast Growth Factor, Type 3/metabolism
    Chemical Substances Polysaccharides ; FGFR3 protein, human (EC 2.7.10.1) ; Receptor, Fibroblast Growth Factor, Type 3 (EC 2.7.10.1)
    Language English
    Publishing date 2024-01-18
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 60-7
    ISSN 1872-8006 ; 1879-2596 ; 1879-260X ; 1879-2642 ; 1879-2618 ; 1879-2650 ; 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    ISSN (online) 1872-8006 ; 1879-2596 ; 1879-260X ; 1879-2642 ; 1879-2618 ; 1879-2650
    ISSN 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    DOI 10.1016/j.bbagen.2024.130565
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: N-glycosylation regulates MET processing and signaling.

    Saitou, Atsushi / Hasegawa, Yoshihiro / Fujitani, Naoki / Ariki, Shigeru / Uehara, Yasuaki / Hashimoto, Ukichiro / Saito, Atsushi / Kuronuma, Koji / Matsumoto, Kunio / Chiba, Hirofumi / Takahashi, Motoko

    Cancer science

    2022  Volume 113, Issue 4, Page(s) 1292–1304

    Abstract: ... potential N-glycosylation sites, but the site-specific roles of these N-glycans have not been elucidated ... We report herein that these N-glycans regulate the proteolytic processing of MET and HGF-induced MET ... signaling, and that this regulation is site specific. Inhibitors of N-glycosylation were found to suppress ...

    Abstract MET, the receptor for the hepatocyte growth factor (HGF), is strongly associated with resistance to tyrosine kinase inhibitors, key drugs that are used in the therapy of non-small cell lung cancer. MET contains 11 potential N-glycosylation sites, but the site-specific roles of these N-glycans have not been elucidated. We report herein that these N-glycans regulate the proteolytic processing of MET and HGF-induced MET signaling, and that this regulation is site specific. Inhibitors of N-glycosylation were found to suppress the processing and trafficking of endogenous MET in H1975 and EBC-1 lung cancer cells and exogenous MET in CHO-K1 cells. We purified the recombinant extracellular domain of human MET and determined the site-specific N-glycan structures and occupancy using mass spectrometry. The results indicated that most sites were fully glycosylated and that the dominant population was the complex type. To examine the effects of the deletion of N-glycans of MET, we prepared endogenous MET knockout Flp-In CHO cells and transfected them with a series of N-glycan-deletion mutants of MET. The results showed that several N-glycans are implicated in the processing of MET. The findings also suggested that the N-glycans of the SEMA domain of MET positively regulate HGF signaling, and the N-glycans of the region other than the SEMA domain negatively regulate HGF signaling. Processing, cell surface expression, and signaling were significantly suppressed in the case of the all-N-glycan-deletion mutant. The overall findings suggest that N-glycans of MET affect the status and the function of the receptor in a site-specific manner.
    MeSH term(s) Animals ; Carcinoma, Non-Small-Cell Lung ; Cricetinae ; Cricetulus ; Glycosylation ; Hepatocyte Growth Factor/metabolism ; Humans ; Lung Neoplasms/drug therapy ; Proto-Oncogene Proteins c-met
    Chemical Substances Hepatocyte Growth Factor (67256-21-7) ; Proto-Oncogene Proteins c-met (EC 2.7.10.1)
    Language English
    Publishing date 2022-02-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2115647-5
    ISSN 1349-7006 ; 1349-7006
    ISSN (online) 1349-7006
    ISSN 1349-7006
    DOI 10.1111/cas.15278
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  7. Article ; Online: Seroprevalence of severe acute respiratory syndrome coronavirus 2 N antibodies between December 2021 and march 2023 in Japan.

    Yamayoshi, Seiya / Nagai, Etsuko / Mitamura, Keiko / Hagihara, Masao / Kobayashi, Ryo / Takahashi, Satoshi / Shibata, Akimichi / Uwamino, Yoshifumi / Hasegawa, Naoki / Iqbal, Asef / Kamimaki, Isamu / Iwatsuki-Horimoto, Kiyoko / Nagamura-Inoue, Tokiko / Kawaoka, Yoshihiro

    Epidemiology and infection

    2024  Volume 152, Page(s) e24

    Abstract: ... the emergence of the omicron variants, the seroprevalence of antibodies against the N protein elicited by SARS ... against N was conducted between December 2021 and March 2023 in Japan. In total, 7604 and 3354 residual ...

    Abstract Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in 2019 in China and rapidly spread worldwide, leading to a pandemic. The threat of SARS-CoV-2 is subsiding as most people have acquired sufficient antibodies through vaccination and/or infection to prevent severe COVID-19. After the emergence of the omicron variants, the seroprevalence of antibodies against the N protein elicited by SARS-CoV-2 infection ranged from 44.4% to 80.2% in countries other than Japan. Here, we assessed the seroprevalence in Japan before and after the appearance of omicron variants. Serosurveillance of antibodies against N was conducted between December 2021 and March 2023 in Japan. In total, 7604 and 3354 residual serum or plasma samples were collected in the Tokyo metropolitan area and Sapporo, respectively. We found that the seroprevalence in representative regions of Japan increased approximately 3% to 23% after the emergence of the omicron variants. We also found higher seroprevalence among the young compared with the elderly. Our findings indicate that unlike other countries, most of the Japanese population has not been infected, raising the possibility of future SARS-CoV-2 epidemics in Japan.
    MeSH term(s) Aged ; Humans ; Japan/epidemiology ; SARS-CoV-2 ; Seroepidemiologic Studies ; COVID-19/epidemiology ; Antibodies, Viral ; Pandemics
    Chemical Substances Antibodies, Viral
    Language English
    Publishing date 2024-01-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 632982-2
    ISSN 1469-4409 ; 0950-2688
    ISSN (online) 1469-4409
    ISSN 0950-2688
    DOI 10.1017/S0950268824000141
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Synthesis of a Stable N-Hetero-Rh

    Takahashi, Shintaro / Nakaya, Kazuki / Frutos, María / Baceiredo, Antoine / Saffon-Merceron, Nathalie / Massou, Stéphane / Nakata, Norio / Hashizume, Daisuke / Branchadell, Vicenç / Kato, Tsuyoshi

    Angewandte Chemie (International ed. in English)

    2020  Volume 59, Issue 37, Page(s) 15937–15941

    Abstract: A novel N-hetero-Rh ...

    Abstract A novel N-hetero-Rh
    Language English
    Publishing date 2020-07-07
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202006088
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  9. Article ; Online: N-acetylcysteine attenuates PGE

    Nakamura, Koichi / Minamikawa, Hajime / Takahashi, Shizuka / Yoshimura, Yoshitaka / Yawaka, Yasutaka

    Dental materials journal

    2021  Volume 40, Issue 3, Page(s) 808–812

    Abstract: This study examined the effects of N-acetylcysteine (NAC) on the inflammatory reactions of murine ...

    Abstract This study examined the effects of N-acetylcysteine (NAC) on the inflammatory reactions of murine osteoblastic cells cultured on the 4-methacryloxyethyl trimellitate anhydride/methyl methacrylate (4-META/MMA)-based resin. Superbond C&B (SB) was used as the 4-META/MMA-based resin and placed in a 48-well cell culture plate. The cells were cultured in αMEM (control) as well as on SB and SB in αMEM with NAC (SB+NAC). They were examined using the WST-1 proliferation assay, real-time PCR, enzyme-linked immunosorbent assay (ELISA), intracellular reactive oxygen species (ROS) measurements, and cellular glutathione (GSH) detection. COX-2 and IL-6 gene expressions were upregulated in SB; however, they were suppressed by NAC. Furthermore, PGE
    MeSH term(s) Acetylcysteine/pharmacology ; Animals ; Cells, Cultured ; Dinoprostone ; Methacrylates ; Mice ; Reactive Oxygen Species
    Chemical Substances Methacrylates ; Reactive Oxygen Species ; 4-methacryloxyethyltrimellitic acid anhydride (70293-55-9) ; Dinoprostone (K7Q1JQR04M) ; Acetylcysteine (WYQ7N0BPYC)
    Language English
    Publishing date 2021-03-27
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 605650-7
    ISSN 1881-1361 ; 0287-4547
    ISSN (online) 1881-1361
    ISSN 0287-4547
    DOI 10.4012/dmj.2020-275
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  10. Article ; Online: N-methyl-2-pyridone-5-carboxamide (N-Me-2PY) has potent anti-fibrotic and anti-inflammatory activity in a fibrotic kidney model: is it an old uremic toxin?

    Yoshimura, Norito / Yamada, Katsutoshi / Ono, Takashi / Notoya, Mitsuru / Yukioka, Hideo / Takahashi, Rina / Wakino, Shu / Kanda, Takeshi / Itoh, Hiroshi

    Clinical and experimental nephrology

    2023  Volume 27, Issue 11, Page(s) 901–911

    Abstract: ... metabolites, such as N-methyl-2-pyridone-5-carboxamide (N-Me-2PY) and N-methyl-4-pyridone-5-carboxamide (N ... and Western blot analysis were conducted. N-Me-2PY was orally administered to a ligated murine kidney ... fibrosis model (UUO) to evaluate its anti-fibrotic and toxic effects on the body.: Results: N-Me-2PY, N ...

    Abstract Background: Uremic toxins accumulate in renal tissues and cells due to chronic kidney disease (CKD). Abnormalities in nicotinamide adenine dinucleotide (NAD +) metabolism lead to the progression of CKD. NAD + metabolites, such as N-methyl-2-pyridone-5-carboxamide (N-Me-2PY) and N-methyl-4-pyridone-5-carboxamide (N-Me-4PY), have been recognized as uremic toxins. However, no reports have validated whether they are actually harmful to the body. Therefore, we focused on the structural similarity of these metabolites to the anti-fibrotic drug pirfenidone and evaluated their effects on renal fibrosis.
    Methods: Each NAD + metabolite was treated with TGFβ1 to kidney fibroblasts or tubular epithelial cells, and quantitative RT-PCR and Western blot analysis were conducted. N-Me-2PY was orally administered to a ligated murine kidney fibrosis model (UUO) to evaluate its anti-fibrotic and toxic effects on the body.
    Results: N-Me-2PY, N-Me-4PY, and nicotinamide N-oxide (NNO) inhibited TGFβ1-induced fibrosis and inflammatory gene expression in kidney fibroblasts. N-Me-2PY strongly suppressed the expression of types I and III collagen, αSMA, and IL-6. N-Me-2PY also suppressed TGFβ1-induced type I collagen and IL-6 expression in renal tubular epithelial cells. No toxic effect was observed with N-Me-2PY treatment, while attenuating renal fibrosis and tubular dilation in UUO mice. Suppression of various fibrosis- and inflammation-related genes was also observed. N-Me-2PY did not inhibit TGFβ1-induced Smad3 phosphorylation but inhibited Akt phosphorylation, suggesting that N-Me-2PY exerts anti-fibrotic and anti-inflammatory effects through Akt inhibition, similar to pirfenidone.
    Conclusions: NAD + metabolites, such as N-Me-2PY, are not uremic toxins but are potential therapeutic agents that have anti-fibrotic effects in CKD.
    MeSH term(s) Mice ; Animals ; NAD/metabolism ; Uremic Toxins ; Proto-Oncogene Proteins c-akt ; Interleukin-6 ; Kidney/metabolism ; Renal Insufficiency, Chronic/drug therapy ; Anti-Inflammatory Agents/pharmacology ; Fibrosis ; Ureteral Obstruction/complications ; Ureteral Obstruction/drug therapy
    Chemical Substances NAD (0U46U6E8UK) ; Uremic Toxins ; N-methyl-2-pyridone-5-carboxamide ; Proto-Oncogene Proteins c-akt (EC 2.7.11.1) ; Interleukin-6 ; Anti-Inflammatory Agents
    Language English
    Publishing date 2023-07-25
    Publishing country Japan
    Document type Journal Article
    ZDB-ID 1338768-6
    ISSN 1437-7799 ; 1342-1751
    ISSN (online) 1437-7799
    ISSN 1342-1751
    DOI 10.1007/s10157-023-02379-1
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