1
|
Shibata K, Moriizumi H, Onomoto K, Kaneko Y, Miyakawa T, Zenno S, Tanokura M, Yoneyama M, Takahashi T, Ui-Tei K. Caspase-mediated processing of TRBP regulates apoptosis during viral infection. Nucleic Acids Res 2024:gkae246. [PMID: 38636948 DOI: 10.1093/nar/gkae246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 03/14/2024] [Accepted: 03/26/2024] [Indexed: 04/20/2024] Open
Abstract
RNA silencing is a post-transcriptional gene-silencing mechanism mediated by microRNAs (miRNAs). However, the regulatory mechanism of RNA silencing during viral infection is unclear. TAR RNA-binding protein (TRBP) is an enhancer of RNA silencing that induces miRNA maturation by interacting with the ribonuclease Dicer. TRBP interacts with a virus sensor protein, laboratory of genetics and physiology 2 (LGP2), in the early stage of viral infection of human cells. Next, it induces apoptosis by inhibiting the maturation of miRNAs, thereby upregulating the expression of apoptosis regulatory genes. In this study, we show that TRBP undergoes a functional conversion in the late stage of viral infection. Viral infection resulted in the activation of caspases that proteolytically processed TRBP into two fragments. The N-terminal fragment did not interact with Dicer but interacted with type I interferon (IFN) signaling modulators, such as protein kinase R (PKR) and LGP2, and induced ER stress. The end results were irreversible apoptosis and suppression of IFN signaling. Our results demonstrate that the processing of TRBP enhances apoptosis, reducing IFN signaling during viral infection.
Collapse
Affiliation(s)
- Keiko Shibata
- Department of Biochemistry and Molecular Biology, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Harune Moriizumi
- Department of Biochemistry and Molecular Biology, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Koji Onomoto
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba 260-8673, Japan
| | - Yuka Kaneko
- Department of Biochemistry and Molecular Biology, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Takuya Miyakawa
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
- Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Shuhei Zenno
- Department of Biotechnology, Faculty of Engineering, Maebashi Institute of Technology, Gunma 371-0816, Japan
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Mitsutoshi Yoneyama
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba 260-8673, Japan
- Division of Pandemic and Post-disaster Infectious Diseases, Research Institute of Disaster Medicine, Chiba University, Chiba 260-8673, Japan
| | - Tomoko Takahashi
- Department of Biochemistry and Molecular Biology, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Kumiko Ui-Tei
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
| |
Collapse
|
2
|
Zhu B, Ouda R, Kasuga Y, de Figueiredo P, Kobayashi KS. NLRC5/MHC class I transactivator: A key target for immune escape by SARS-CoV-2. Bioessays 2024; 46:e2300109. [PMID: 38461519 DOI: 10.1002/bies.202300109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 09/11/2023] [Accepted: 02/01/2024] [Indexed: 03/12/2024]
Abstract
Antigen presentation to CD8+ T cells by MHC class I molecules is essential for host defense against viral infections. Various mechanisms have evolved in multiple viruses to escape immune surveillance and defense to support viral proliferation in host cells. Through in vitro SARS-CoV-2 infection studies and analysis of COVID-19 patient samples, we found that SARS-CoV-2 suppresses the induction of the MHC class I pathway by inhibiting the expression and function of NLRC5, a major transcriptional regulator of MHC class I genes. In this review, we discuss the molecular mechanisms for suppression of the MHC class I pathway and clinical implications for COVID-19.
Collapse
Affiliation(s)
- Baohui Zhu
- Department of Immunology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
| | - Ryota Ouda
- Department of Immunology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
| | - Yusuke Kasuga
- Department of Immunology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
| | - Paul de Figueiredo
- Christopher S Bond Life Sciences Center, University of Missouri, Columbia, Missouri, USA
- Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, Missouri, USA
- Department of Veterinary Pathobiology, University of Missouri, Columbia, Missouri, USA
| | - Koichi S Kobayashi
- Department of Immunology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
- Institute for Vaccine Research and Development (IVReD), Hokkaido University, Sapporo, Hokkaido, Japan
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan, Texas, USA
| |
Collapse
|
3
|
Sun X, Watanabe T, Oda Y, Shen W, Ahmad A, Ouda R, de Figueiredo P, Kitamura H, Tanaka S, Kobayashi KS. Targeted demethylation and activation of NLRC5 augment cancer immunogenicity through MHC class I. Proc Natl Acad Sci U S A 2024; 121:e2310821121. [PMID: 38300873 PMCID: PMC10861931 DOI: 10.1073/pnas.2310821121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 12/30/2023] [Indexed: 02/03/2024] Open
Abstract
Impaired expression of MHC (major histocompatibility complex) class I in cancers constitutes a major mechanism of immune evasion. It has been well documented that the low level of MHC class I is associated with poor prognosis and resistance to checkpoint blockade therapies. However, there is lmited approaches to specifically induce MHC class I to date. Here, we show an approach for robust and specific induction of MHC class I by targeting an MHC class I transactivator (CITA)/NLRC5, using a CRISPR/Cas9-based gene-specific system, designated TRED-I (Targeted reactivation and demethylation for MHC-I). The TRED-I system specifically recruits a demethylating enzyme and transcriptional activators on the NLRC5 promoter, driving increased MHC class I antigen presentation and accelerated CD8+ T cell activation. Introduction of the TRED-I system in an animal cancer model exhibited tumor-suppressive effects accompanied with increased infiltration and activation of CD8+ T cells. Moreover, this approach boosted the efficacy of checkpoint blockade therapy using anti-PD1 (programmed cell death protein) antibody. Therefore, targeting NLRC5 by this strategy provides an attractive therapeutic approach for cancer.
Collapse
Affiliation(s)
- Xin Sun
- Department of Immunology, Graduate School of Medicine, Hokkaido University, Sapporo060-8638, Japan
| | - Toshiyuki Watanabe
- Department of Immunology, Graduate School of Medicine, Hokkaido University, Sapporo060-8638, Japan
| | - Yoshitaka Oda
- Department of Cancer Pathology, Graduate School of Medicine, Hokkaido University, Hokkaido, Sapporo060-8638, Japan
| | - Weidong Shen
- Division of Functional Immunology, Section of Disease Control, Institute for Genetic Medicine, Hokkaido University, Sapporo060-8638, Japan
| | - Alaa Ahmad
- Department of Immunology, Graduate School of Medicine, Hokkaido University, Sapporo060-8638, Japan
| | - Ryota Ouda
- Department of Immunology, Graduate School of Medicine, Hokkaido University, Sapporo060-8638, Japan
| | - Paul de Figueiredo
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan, TX77807
- Department of Molecular Microbiology and Immunology, University of Missouri School of Medicine, Columbia, MO65211
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO65211
- Department of Veterinary Pathobiology, University of MissouriSchool of Veterinary Medicine, Columbia, MO65211
| | - Hidemitsu Kitamura
- Division of Functional Immunology, Section of Disease Control, Institute for Genetic Medicine, Hokkaido University, Sapporo060-8638, Japan
- Department of Biomedical Engineering, Faculty of Science and Engineering, Toyo University, Kawagoe350-8585, Japan
| | - Shinya Tanaka
- Department of Cancer Pathology, Graduate School of Medicine, Hokkaido University, Hokkaido, Sapporo060-8638, Japan
- Institute for Chemical Reaction Design and Discovery, Hokkaido University, Sapporo001-0021, Japan
| | - Koichi S. Kobayashi
- Department of Immunology, Graduate School of Medicine, Hokkaido University, Sapporo060-8638, Japan
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan, TX77807
- Institute for Vaccine Research and Development, Hokkaido University, Sapporo060-8638, Japan
| |
Collapse
|
4
|
Itoh M, Tamura A, Kanai S, Tanaka M, Kanamori Y, Shirakawa I, Ito A, Oka Y, Hidaka I, Takami T, Honda Y, Maeda M, Saito Y, Murata Y, Matozaki T, Nakajima A, Kataoka Y, Ogi T, Ogawa Y, Suganami T. Lysosomal cholesterol overload in macrophages promotes liver fibrosis in a mouse model of NASH. J Exp Med 2023; 220:e20220681. [PMID: 37725372 PMCID: PMC10506914 DOI: 10.1084/jem.20220681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 04/27/2023] [Accepted: 07/20/2023] [Indexed: 09/21/2023] Open
Abstract
Accumulation of lipotoxic lipids, such as free cholesterol, induces hepatocyte death and subsequent inflammation and fibrosis in the pathogenesis of nonalcoholic steatohepatitis (NASH). However, the underlying mechanisms remain unclear. We have previously reported that hepatocyte death locally induces phenotypic changes in the macrophages surrounding the corpse and remnant lipids, thereby promoting liver fibrosis in a murine model of NASH. Here, we demonstrated that lysosomal cholesterol overload triggers lysosomal dysfunction and profibrotic activation of macrophages during the development of NASH. β-cyclodextrin polyrotaxane (βCD-PRX), a unique supramolecule, is designed to elicit free cholesterol from lysosomes. Treatment with βCD-PRX ameliorated cholesterol accumulation and profibrotic activation of macrophages surrounding dead hepatocytes with cholesterol crystals, thereby suppressing liver fibrosis in a NASH model, without affecting the hepatic cholesterol levels. In vitro experiments revealed that cholesterol-induced lysosomal stress triggered profibrotic activation in macrophages predisposed to the steatotic microenvironment. This study provides evidence that dysregulated cholesterol metabolism in macrophages would be a novel mechanism of NASH.
Collapse
Affiliation(s)
- Michiko Itoh
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Bioelectronics, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
- Kanagawa Institute of Industrial Science and Technology, Kawasaki, Japan
- Department of Metabolic Syndrome and Nutritional Science, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Atsushi Tamura
- Department of Organic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sayaka Kanai
- Department of Bioelectronics, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
- Kanagawa Institute of Industrial Science and Technology, Kawasaki, Japan
| | - Miyako Tanaka
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Immunometabolism, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Nagoya, Japan
| | - Yohei Kanamori
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Ibuki Shirakawa
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Ayaka Ito
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Immunometabolism, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasuyoshi Oka
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Isao Hidaka
- Department of Gastroenterology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Taro Takami
- Department of Gastroenterology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Yasushi Honda
- Department of Gastroenterology and Hepatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Mitsuyo Maeda
- Multi-Modal Microstructure Analysis Unit, RIKEN-JEOL Collaboration Center, Kobe, Japan
- Laboratory for Cellular Function Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Yasuyuki Saito
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yoji Murata
- Division of Molecular and Cellular Signaling, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Takashi Matozaki
- Division of Biosignal Regulation, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Atsushi Nakajima
- Department of Gastroenterology and Hepatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Yosky Kataoka
- Multi-Modal Microstructure Analysis Unit, RIKEN-JEOL Collaboration Center, Kobe, Japan
- Laboratory for Cellular Function Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Tomoo Ogi
- Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Yoshihiro Ogawa
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Takayoshi Suganami
- Department of Molecular Medicine and Metabolism, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
- Department of Immunometabolism, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Institute of Nano-Life-Systems, Institutes of Innovation for Future Society, Nagoya University, Nagoya, Japan
- Center for One Medicine Innovative Translational Research, Gifu University Institute for Advanced Study, Gifu, Japan
| |
Collapse
|
5
|
Bian Z, Nakano Y, Miyata K, Oya I, Nobuoka M, Tsutsui Y, Seki S, Suda M. Chiral Van Der Waals Superlattices for Enhanced Spin-Selective Transport and Spin-Dependent Electrocatalytic Performance. Adv Mater 2023; 35:e2306061. [PMID: 37695880 DOI: 10.1002/adma.202306061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 08/30/2023] [Indexed: 09/13/2023]
Abstract
The emergence of the chiral-induced spin-selectivity (CISS) effect offers a new avenue for chiral organic molecules to autonomously manipulate spin configurations, thereby opening up possibilities in spintronics and spin-dependent electrochemical applications. Despite extensive exploration of various chiral systems as spin filters, one often encounters challenges in achieving simultaneously high conductivity and high spin polarization (SP). In this study, a promising chiral van der Waals superlattice, specifically the chiral TiS2 crystal, is synthesized via electrochemical intercalation of chiral molecules into a metallic TiS2 single crystal. Multiple tunneling processes within the highly ordered chiral layered structure of chiral TiS2 superlattices result in an exceptionally high SP exceeding 90%. This remarkable observation of significantly high SP within the linear transport regime is unprecedented. Furthermore, the chiral TiS2 electrode exhibits enhanced catalytic activity for oxygen evolution reaction (OER) due to its remarkable spin-selectivity for triplet oxygen evolution. The OER performance of chiral TiS2 superlattice crystals presented here exhibits superior characteristics to previously reported chiral MoS2 catalysts, with an approximately tenfold increase in current density. The combination of metallic conductivity and high SP sets the stage for the development of a new generation of CISS materials, enabling a wide range of electron spin-based applications.
Collapse
Affiliation(s)
- Zhiyun Bian
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yuki Nakano
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Keisuke Miyata
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Ichiro Oya
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Masaki Nobuoka
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yusuke Tsutsui
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
- JST-PRESTO, Honcho 4-1-8, Kawaguchi, Saitama, 332-0012, Japan
| | - Shu Seki
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Masayuki Suda
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
- JST-PRESTO, Honcho 4-1-8, Kawaguchi, Saitama, 332-0012, Japan
- JST-FOREST, Honcho 4-1-8, Kawaguchi, Saitama, 332-0012, Japan
| |
Collapse
|
6
|
Kasuga Y, Ouda R, Watanabe M, Sun X, Kimura M, Hatakeyama S, Kobayashi KS. FBXO11 constitutes a major negative regulator of MHC class II through ubiquitin-dependent proteasomal degradation of CIITA. Proc Natl Acad Sci U S A 2023; 120:e2218955120. [PMID: 37279268 DOI: 10.1073/pnas.2218955120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 03/27/2023] [Indexed: 06/08/2023] Open
Abstract
Major histocompatibility complex (MHC) class I and II molecules play critical roles in the activation and regulation of adaptive immunity through antigen presentation to CD8+ and CD4+ T cells, respectively. Strict regulation of MHC expression is critical for proper immune responses. CIITA (MHC class II transactivator), an NLR (nucleotide-binding domain, leucine-rich-repeat containing) protein, is a master regulator of MHC class II (MHC-II) gene transcription. Although it has been known that CIITA activity is regulated at the transcriptional and protein levels, the mechanism to determine CIITA protein level has not been elucidated. Here, we show that FBXO11 is a bona fide E3 ligase of CIITA and regulates CIITA protein level through ubiquitination-mediated degradation. A nonbiased proteomic approach for CIITA-binding protein identified FBXO11, a member of the Skp1-Cullin-1-F-box E3 ligase complex, as a binding partner of CIITA but not MHC class I transactivator, NLRC5. The cycloheximide chase assay showed that the half-life of CIITA is mainly regulated by FBXO11 via the ubiquitin-proteasome system. The expression of FBXO11 led to the reduced MHC-II at the promoter activity level, transcriptional level, and surface expression level through downregulation of CIITA. Moreover, human and mouse FBXO11-deficient cells display increased levels of MHC-II and related genes. In normal and cancer tissues, FBXO11 expression level is negatively correlated with MHC-II. Interestingly, the expression of FBXO11, along with CIITA, is associated with prognosis of cancer patients. Therefore, FBXO11 is a critical regulator to determine the level of MHC-II, and its expression may serve as a biomarker for cancer.
Collapse
Affiliation(s)
- Yusuke Kasuga
- Department of Immunology, Hokkaido University, Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Ryota Ouda
- Department of Immunology, Hokkaido University, Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Masashi Watanabe
- Department of Biochemistry, Hokkaido University, Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Xin Sun
- Department of Immunology, Hokkaido University, Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Miki Kimura
- Department of Immunology, Hokkaido University, Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Shigetsugu Hatakeyama
- Department of Biochemistry, Hokkaido University, Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Koichi S Kobayashi
- Department of Immunology, Hokkaido University, Graduate School of Medicine, Sapporo 060-8638, Japan
- Hokkaido University, Institute of Vaccine Research and Development, Sapporo 060-8638, Japan
- Department of Microbial Pathogenesis and Immunology, Texas A&M Health Science Center, Bryan, TX 77807
| |
Collapse
|
7
|
Fujii H, Kidokoro H, Kondo Y, Kawaguchi M, Horigane SI, Natsume J, Takemoto-Kimura S, Bito H. Förster resonance energy transfer-based kinase mutation phenotyping reveals an aberrant facilitation of Ca2+/calmodulin-dependent CaMKIIα activity in de novo mutations related to intellectual disability. Front Mol Neurosci 2022; 15:970031. [PMID: 36117912 PMCID: PMC9474683 DOI: 10.3389/fnmol.2022.970031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/25/2022] [Indexed: 11/13/2022] Open
Abstract
CaMKIIα plays a fundamental role in learning and memory and is a key determinant of synaptic plasticity. Its kinase activity is regulated by the binding of Ca2+/CaM and by autophosphorylation that operates in an activity-dependent manner. Though many mutations in CAMK2A were linked to a variety of neurological disorders, the multiplicity of its functional substrates renders the systematic molecular phenotyping challenging. In this study, we report a new case of CAMK2A P212L, a recurrent mutation, in a patient with an intellectual disability. To quantify the effect of this mutation, we developed a FRET-based kinase phenotyping strategy and measured aberrance in Ca2+/CaM-dependent activation dynamics in vitro and in synaptically connected neurons. CaMKIIα P212L revealed a significantly facilitated Ca2+/CaM-dependent activation in vitro. Consistently, this mutant showed faster activation and more delayed inactivation in neurons. More prolonged kinase activation was also accompanied by a leftward shift in the CaMKIIα input frequency tuning curve. In keeping with this, molecular phenotyping of other reported CAMK2A de novo mutations linked to intellectual disability revealed aberrant facilitation of Ca2+/CaM-dependent activation of CaMKIIα in most cases. Finally, the pharmacological reversal of CAMK2A P212L phenotype in neurons was demonstrated using an FDA-approved NMDA receptor antagonist memantine, providing a basis for targeted therapeutics in CAMK2A-linked intellectual disability. Taken together, FRET-based kinase mutation phenotyping sheds light on the biological impact of CAMK2A mutations and provides a selective, sensitive, quantitative, and scalable strategy for gaining novel insights into the molecular etiology of intellectual disability.
Collapse
Affiliation(s)
- Hajime Fujii
- Department of Neurochemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- *Correspondence: Hajime Fujii
| | - Hiroyuki Kidokoro
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yayoi Kondo
- Department of Neurochemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Masahiro Kawaguchi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shin-ichiro Horigane
- Department of Neuroscience I, Research Institute of Environmental Medicine (RIEM), Nagoya University, Nagoya, Japan
- Department of Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Jun Natsume
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
- Department of Developmental Disability Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sayaka Takemoto-Kimura
- Department of Neuroscience I, Research Institute of Environmental Medicine (RIEM), Nagoya University, Nagoya, Japan
- Department of Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Haruhiko Bito
- Department of Neurochemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Haruhiko Bito
| |
Collapse
|
8
|
Saw MJ, Nguyen MT, Kunisada Y, Tokunaga T, Yonezawa T. Anisotropic Growth of Copper Nanorods Mediated by Cl - Ions. ACS Omega 2022; 7:7414-7420. [PMID: 35252731 PMCID: PMC8892852 DOI: 10.1021/acsomega.2c00359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/03/2022] [Indexed: 06/14/2023]
Abstract
Anisotropic growth to form Cu particles of rod and wire shapes has been obtained typically in a complex system that involves both organic capping agents and Cl- ions. However, the sole effect of Cl- ions on the formation of Cu wires has yet to be fully understood, especially in an organic system. This present work determines the effect of Cl- ions on the morphologies of Cu particles in an organic phase without any capping agents. The results revealed that anisotropic Cu rods could be grown with the sole presence of Cl- ions. The rods have the (011) facets as the long axis, the (111) facets as the tip, and the (100) facets as the side surface. By increasing the Cl- ion concentration, more Cu atoms contributed to the formation of Cu rods and the kinetic growth of the length and the diameter of the rods varied. This suggests that Cl- ions have preferential adsorption on the (100) Cu surfaces to promote the anisotropic growth of Cu. Meanwhile, the adsorption of Cl- to the (111) and (100) surfaces at high Cl- concentrations regulates the relative growth of the particle length and diameter.
Collapse
Affiliation(s)
- Min Jia Saw
- Division
of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Mai Thanh Nguyen
- Division
of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Yuji Kunisada
- Center
for Advanced Research of Energy
and Materials, Faculty of Engineering, Hokkaido
University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Tomoharu Tokunaga
- Department
of Materials Science and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Tetsu Yonezawa
- Division
of Materials Science and Engineering, Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| |
Collapse
|
9
|
Kobayashi Y, Fukuhara D, Akase D, Aida M, Ui-Tei K. siRNA Seed Region Is Divided into Two Functionally Different Domains in RNA Interference in Response to 2'-OMe Modifications. ACS Omega 2022; 7:2398-2410. [PMID: 35071927 PMCID: PMC8771963 DOI: 10.1021/acsomega.1c06455] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 12/24/2021] [Indexed: 05/04/2023]
Abstract
In RNA interference (RNAi), small interfering RNA (siRNA) functions to suppress the expression of its target mRNA with perfect sequence complementarity. In a mechanism different from above, siRNA also suppresses unintended mRNAs with partial sequence complementarities, mainly to the siRNA seed region (nucleotides 2-8). This mechanism is largely utilized by microRNAs (miRNAs) and results in siRNA-mediated off-target effects. Thus, the siRNA seed region is considered to be involved in both RNAi and off-target effects. In this study, we revealed that the impact of 2'-O-methyl (2'-OMe) modification is different according to the nucleotide positions. The 2'-OMe modifications of nucleotides 2-5 inhibited off-target effects without affecting on-target RNAi activities. In contrast, 2'-OMe modifications of nucleotides 6-8 increased both RNAi and off-target activities. The computational simulation revealed that the structural change induced by 2'-OMe modifications interrupts base pairing between siRNA and target/off-target mRNAs at nucleotides 2-5 but enhances at nucleotides 6-8. Thus, our results suggest that siRNA seed region consists of two functionally different domains in response to 2'-OMe modifications: nucleotides 2-5 are essential for avoiding off-target effects, and nucleotides 6-8 are involved in the enhancement of both RNAi and off-target activities.
Collapse
Affiliation(s)
- Yoshiaki Kobayashi
- Department
of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Daiki Fukuhara
- Center
for Quantum Life Sciences and Department of Chemistry, Graduate School
of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Dai Akase
- Center
for Quantum Life Sciences and Department of Chemistry, Graduate School
of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Misako Aida
- Center
for Quantum Life Sciences and Department of Chemistry, Graduate School
of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Kumiko Ui-Tei
- Department
of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
- Department
of Computational Biology and Medical Sciences, Graduate School of
Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
- . Phone: +81-3-5841-3044. Fax: +81-3-5841-3044
| |
Collapse
|
10
|
Abstract
BACKGROUND This study examines the use of career ladders for medical assistants (MAs) in primary care practices as a mechanism for increasing wages and career opportunity for MAs. A growing body of research on primary care suggests that successful expansion of support staff roles such as MAs may have positive organizational and quality of care outcomes, but little is known about worker outcomes. OBJECTIVE Evaluate the effectiveness of career ladders in improving wages and career opportunity among MAs. DESIGN We use a mixed-methods design to evaluate the impact of career ladders on MA job quality. PARTICIPANTS We draw on interview data collected from 115 key informants at four large health systems (ranging from 24 to 29 clinics each), and we analyze wage and employment data for MAs from primary care clinics in the four health systems in the sample. APPROACH We describe the MA career ladder context and infrastructure within primary care clinics and evaluate the rewards to MAs for participation in the career ladder programs. KEY RESULTS The expanded roles within career ladders for MAs focused on the following four clinical and educational areas: panel management and care coordination, EHR documentation support, supporting delivery of person-centered care, and supervision and training. The three primary components of the career ladder infrastructure were training and education for MAs and providers, credentialing and certification for MAs, and differentiated job levels for MAs. The use of career ladders in the four large health systems in our case study sample resulted in yearly income increases ranging from $3000 to $10,000 annually. CONCLUSION Investing in career ladders in primary care clinics can improve MA job quality while also potentially addressing issues of equity, efficiency, and quality in the health care sector.
Collapse
Affiliation(s)
- Janette Dill
- Health Policy & Management, School of Public Health, The University of Minnesota, Minneapolis, MN, 55455, USA.
| | | | - Emmeline Chuang
- Mack Center on Nonprofit and Public Sector Management in the Human Services, School of Social Welfare, University of California, Berkeley, Berkeley, USA
| |
Collapse
|
11
|
Shimizu E, Yazu H, Aketa N, Yokoiwa R, Sato S, Yajima J, Katayama T, Sato R, Tanji M, Sato Y, Ogawa Y, Tsubota K. A Study Validating the Estimation of Anterior Chamber Depth and Iridocorneal Angle with Portable and Non-Portable Slit-Lamp Microscopy. Sensors (Basel) 2021; 21:1436. [PMID: 33669487 PMCID: PMC7921911 DOI: 10.3390/s21041436] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/13/2021] [Accepted: 02/17/2021] [Indexed: 11/16/2022]
Abstract
This study assessed the anterior chamber depth (ACD) and iridocorneal angle using a portable smart eye camera (SEC) compared to the conventional slit-lamp microscope and anterior-segment optical coherence tomography (AS-OCT). This retrospective case-control study included 170 eyes from 85 Japanese patients. The correlation between the ACD evaluations conducted with the SEC and conventional slit-lamp was high (r = 0.814). The correlation between the Van-Herick Plus grade obtained using two devices was also high (r = 0.919). A high kappa value was observed for the Van-Herick Plus grading (Kappa = 0.757). A moderate correlation was observed between the ACD measured using AS-OCT and the slit-lamp image acquired with the conventional slit-lamp microscope and SEC (r = 0.609 and 0.641). A strong correlation was observed between the trabecular-iris angle (TIA) measured using AS-OCT and Van-Herick Plus grade obtained with the conventional slit-lamp microscope and SEC (r = 0.702 and 0.764). Strong correlations of ACD evaluation and high kappa value of the Van-Herick Plus grading indicated the adequate subjective assessment function of the SEC. Moderate correlations between the ACD objective measurement and evaluation and strong correlation between the TIA and Van-Herick Plus grade suggested the good objective assessment function of the SEC. The SEC demonstrated adequate performance for ACD evaluation and angle estimation.
Collapse
Affiliation(s)
- Eisuke Shimizu
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
- OUI Inc., Tokyo 160-0022, Japan;
- Yokohama Keiai Eye Clinic, Kanagawa 240-0065, Japan
| | - Hiroyuki Yazu
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
- OUI Inc., Tokyo 160-0022, Japan;
- Yokohama Keiai Eye Clinic, Kanagawa 240-0065, Japan
- Department of Ophthalmology, Tsurumi University School of Dental Medicine, Kanagawa 230-8501, Japan
| | - Naohiko Aketa
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
| | | | - Shinri Sato
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
- Yokohama Keiai Eye Clinic, Kanagawa 240-0065, Japan
| | - Junichiro Yajima
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
| | - Taiichiro Katayama
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
| | - Rio Sato
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
| | - Makoto Tanji
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
- OUI Inc., Tokyo 160-0022, Japan;
| | - Yasunori Sato
- Department of Preventive Medicine and Public Health, School of Medicine, Keio University, Tokyo 160-8582, Japan;
| | - Yoko Ogawa
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
| | - Kazuo Tsubota
- Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.Y.); (N.A.); (S.S.); (J.Y.); (T.K.); (R.S.); (M.T.); (Y.O.); (K.T.)
| |
Collapse
|
12
|
Kirino I, Fujita K, Sakanoue K, Sugita R, Yamagishi K, Takeoka S, Fujie T, Uemoto S, Morimoto Y. Metronomic photodynamic therapy using an implantable LED device and orally administered 5-aminolevulinic acid. Sci Rep 2020; 10:22017. [PMID: 33328544 PMCID: PMC7744509 DOI: 10.1038/s41598-020-79067-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 12/02/2020] [Indexed: 11/23/2022] Open
Abstract
Metronomic photodynamic therapy (mPDT) is a form of PDT that induces cancer cell death by intermittent continuous irradiation with a relatively weak power of light for a long duration (several days). We previously developed a wirelessly powered, fully implantable LED device and reported a significant anti-tumor effect of mPDT. Considering application in clinical practice, the method used for repeated administrations of photosensitizers required for mPDT should not have a high patient burden such as the burden of transvenous administration. Therefore, in this study, we selected 5-aminolevulinic acid (ALA), which can be administered orally, as a photosensitizer, and we studied the antitumor effects of mPDT. In mice with intradermal tumors that were orally administered ALA (200 mg/kg daily for 5 days), the tumor in each mouse was simultaneously irradiated (8 h/day for 5 days) using a wirelessly powered implantable green LED device (532 nm, 0.05 mW). Tumor growth in the mPDT-treated mice was suppressed by about half compared to that in untreated mice. The results showed that mPDT using the wirelessly powered implantable LED device exerted an antitumor effect even with the use of orally administered ALA, and this treatment scheme can reduce the burden of photosensitizer administration for a patient.
Collapse
Affiliation(s)
- Izumi Kirino
- Department of Physiology, National Defense Medical College, Namiki 3-2, Tokorozawa, Saitama, 359-8513, Japan
- Division of Hepatobiliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Katsuhiko Fujita
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, Japan
| | | | - Rin Sugita
- Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | - Kento Yamagishi
- Research Organization for Nano & Life Innovation, Waseda University, Tokyo, Japan
| | - Shinji Takeoka
- Faculty of Science and Engineering, Waseda University, Tokyo, Japan
| | - Toshinori Fujie
- Research Organization for Nano & Life Innovation, Waseda University, Tokyo, Japan
- School of Life Science and Technology, Tokyo Institute of Technology, Tokyo, Japan
| | - Shinji Uemoto
- Division of Hepatobiliary-Pancreatic Surgery and Transplantation, Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yuji Morimoto
- Department of Physiology, National Defense Medical College, Namiki 3-2, Tokorozawa, Saitama, 359-8513, Japan.
| |
Collapse
|