1
|
Hirose S, Kobatake Y, Tada N, Kandeel M, Itoh A, Oh-Hashi K. NanoBiT-based Analysis of Canine SOD1 Protein Dynamics: Understanding the Role of CCS and Ebselen Derivatives as Potential Therapeutics for Canine Degenerative Myelopathy. Cell Biochem Biophys 2025:10.1007/s12013-025-01768-5. [PMID: 40355776 DOI: 10.1007/s12013-025-01768-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/24/2025] [Indexed: 05/15/2025]
Abstract
Canine degenerative myelopathy (DM) is a progressive neurodegenerative disorder that shares common pathological features with amyotrophic lateral sclerosis (ALS) in humans. Both diseases are linked to mutations in the superoxide dismutase 1 (SOD1) gene. Understanding the molecular differences between wild-type (WT) and mutant SOD1 proteins is critical for developing therapeutic strategies. In this study, we employed the NanoLuc complementation (NanoBiT) reporter system to investigate the expression and functional differences between WT and E40K mutant canine SOD1 to assess the therapeutic potential of copper chaperone for SOD1 (CCS) and ebselen derivatives. E40K cSOD1 displayed significantly reduced luciferase activity compared to WT cSOD1 in all NanoBiT-tagged combinations, indicating altered homodimerization and protein stability. Co-transfection with CCS increased both WT and mutant cSOD1 protein levels and reporter activities, with a more pronounced effect on the E40K mutant. Ebselen treatment enhanced luciferase activity, particularly in E40K cSOD1-expressing cells. Two compounds (compounds 2 and 5) were stronger than the parent compound in improving mutant cSOD1-derived NanoBiT activities. Additionally, molecular docking simulations revealed stronger binding affinities of ebselen and its derivatives to E40K cSOD1, suggesting potential therapeutic benefits. In conclusion, the NanoLuc reporter system offers a valuable tool for screening potential therapeutics for SOD1-linked neurodegenerative diseases. CCS and ebselen derivatives exhibited promising effects on SOD1 activity, providing a basis for future therapeutic strategies targeting both DM and ALS.
Collapse
Affiliation(s)
- Sakura Hirose
- Graduate School of Natural Science and Technology, Gifu University, Gifu, Japan
| | - Yui Kobatake
- Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
- Center for One Medicine Innovative Translational Research (COMIT), Institute for Advanced Study, Gifu University, Gifu, Japan
| | - Norihiro Tada
- Laboratory of Pharmaceutical Synthetic Chemistry, Faculty of Pharmaceutical Science, Gifu Pharmaceutical University, Gifu, Japan
| | - Mahmoud Kandeel
- Department of Biomedical Sciences, College of Veterinary Medicine, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Akichika Itoh
- Center for One Medicine Innovative Translational Research (COMIT), Institute for Advanced Study, Gifu University, Gifu, Japan
- Laboratory of Pharmaceutical Synthetic Chemistry, Faculty of Pharmaceutical Science, Gifu Pharmaceutical University, Gifu, Japan
| | - Kentaro Oh-Hashi
- Graduate School of Natural Science and Technology, Gifu University, Gifu, Japan.
- Center for One Medicine Innovative Translational Research (COMIT), Institute for Advanced Study, Gifu University, Gifu, Japan.
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan.
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan.
| |
Collapse
|
2
|
Morishima T, Fakruddin M, Kanamori Y, Masuda T, Ogawa A, Wang Y, Schoonenberg VAC, Butter F, Arima Y, Akaike T, Moroishi T, Tomizawa K, Suda T, Wei FY, Takizawa H. Mitochondrial translation regulates terminal erythroid differentiation by maintaining iron homeostasis. SCIENCE ADVANCES 2025; 11:eadu3011. [PMID: 39983002 PMCID: PMC11844735 DOI: 10.1126/sciadv.adu3011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2024] [Accepted: 01/22/2025] [Indexed: 02/23/2025]
Abstract
Mitochondrial tRNA taurine modifications mediated by mitochondrial tRNA translation optimization 1 (Mto1) is essential for the mitochondrial protein translation. Mto1 deficiency was shown to induce proteostress in embryonic stem cells. A recent finding that a patient with MTO1 gene mutation showed severe anemia led us to hypothesize that Mto1 dysfunctions may result in defective erythropoiesis. Hematopoietic-specific Mto1 conditional knockout (cKO) mice were embryonic lethal and showed niche-independent defect in erythroblast proliferation and terminal differentiation. Mechanistically, mitochondrial oxidative phosphorylation complexes were severely impaired in the Mto1 cKO fetal liver, and this was followed by cytosolic iron accumulation. Overloaded cytosolic iron promoted heme biosynthesis, which induced an unfolded protein response (UPR) in Mto1 cKO erythroblasts. An iron chelator or UPR inhibitor rescued erythroid terminal differentiation in the Mto1 cKO fetal liver in vitro. This mitochondrial regulation of iron homeostasis revealed the indispensable role of mitochondrial tRNA modification in fetal hematopoiesis.
Collapse
Affiliation(s)
- Tatsuya Morishima
- Laboratory of Stem Cell Stress, International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, Japan
- Laboratory of Hematopoietic Stem Cell Engineering, IRCMS, Kumamoto University, Kumamoto, Japan
| | - Md. Fakruddin
- Laboratory of Stem Cell Stress, International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, Japan
- Laboratory of Hematopoietic Stem Cell Engineering, IRCMS, Kumamoto University, Kumamoto, Japan
| | - Yohei Kanamori
- Department of Molecular and Medical Pharmacology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Takeshi Masuda
- Department of Pharmaceutical Microbiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Akiko Ogawa
- Department of Modomics Biology and Medicine, IDAC, Tohoku University, Sendai, Japan
| | - Yuxin Wang
- Laboratory of Stem Cell Stress, International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, Japan
| | | | - Falk Butter
- Quantitative Proteomics, Institute of Molecular Biology, 55128 Mainz, Germany
| | - Yuichiro Arima
- Laboratory of Developmental Cardiology, IRCMS, Kumamoto University, Kumamoto, Japan
- Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University, Kumamoto, Japan
| | - Takaaki Akaike
- Department of Environmental Medicine and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Toshiro Moroishi
- Department of Molecular and Medical Pharmacology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
- Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University, Kumamoto, Japan
| | - Kazuhito Tomizawa
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Toshio Suda
- Laboratory of Stem Cell Regulation, IRCMS, Kumamoto University, Kumamoto, Japan
- State Key Laboratory of Experimental Hematology, Institute of Hematology, Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Fan-Yan Wei
- Department of Modomics Biology and Medicine, IDAC, Tohoku University, Sendai, Japan
| | - Hitoshi Takizawa
- Laboratory of Stem Cell Stress, International Research Center for Medical Sciences (IRCMS), Kumamoto University, Kumamoto, Japan
- Center for Metabolic Regulation of Healthy Aging (CMHA), Kumamoto University, Kumamoto, Japan
| |
Collapse
|
3
|
Chen S, You J, Zhou X, Li Y, Liu F, Teng Y, Teng H, Li Y, Liang D, Li Z, Wu L. PIGK defects induce apoptosis in Purkinje cells and acceleration of neuroectodermal differentiation. Cell Death Dis 2024; 15:808. [PMID: 39521780 PMCID: PMC11550446 DOI: 10.1038/s41419-024-07201-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 10/26/2024] [Accepted: 10/30/2024] [Indexed: 11/16/2024]
Abstract
Biallelic mutations in PIGK cause GPI biosynthesis defect 22 (GPIBD22), characterized with developmental delay, hypotonia, and cerebellar atrophy. The understanding of the underlying causes is limited due to the lack of suitable disease models. To address this gap, we generated a mouse model with PIGK deficits, specifically in Purkinje cells (Pcp2-cko) and an induced pluripotent stem cell (iPSC) model using the c.87dupT mutant (KI) found in GPIBD22 patients. Pcp2-cko mice demonstrated cerebellar atrophy, ataxia and progressive Purkinje cells loss which were accompanied by increased apoptosis and neuroinflammation. Similarly, KI iPSCs exhibited increased apoptosis and accelerated neural rosette formation, indicating that PIGK defects could impact early neural differentiation that confirmed by the RNA-Seq results of neural progenitor cells (NPCs). The increased apoptosis and accelerated NPC differentiation in KI iPSCs are associated with excessive unfolded protein response (UPR) pathway activation, and can be rescued by UPR pathway inhibitor. Our study reveals potential pathogenic mechanism of GPIBD22 and providing new insights into the therapeutic strategy for GPIBD.
Collapse
Affiliation(s)
- Siyi Chen
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Jiali You
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Xiaowei Zhou
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Yan Li
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Fang Liu
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Yanling Teng
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
- Department of Medical Genetics, Hunan Jiahui Genetics Hospital, Changsha, China
| | - Hua Teng
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
- Department of Medical Genetics, Hunan Jiahui Genetics Hospital, Changsha, China
| | - Yunlong Li
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China
| | - Desheng Liang
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China.
- Department of Medical Genetics, Hunan Jiahui Genetics Hospital, Changsha, China.
| | - Zhuo Li
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China.
- Department of Medical Genetics, Hunan Jiahui Genetics Hospital, Changsha, China.
| | - Lingqian Wu
- Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, MOE KeyLab of Rare Pediatric Diseases, School of Life Sciences, Central South University, Changsha, China.
- Department of Medical Genetics, Hunan Jiahui Genetics Hospital, Changsha, China.
| |
Collapse
|
4
|
Wang M, Mo D, Zhang N, Yu H. Ferroptosis in diabetic cardiomyopathy: Advances in cardiac fibroblast-cardiomyocyte interactions. Heliyon 2024; 10:e35219. [PMID: 39165946 PMCID: PMC11334834 DOI: 10.1016/j.heliyon.2024.e35219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 06/19/2024] [Accepted: 07/24/2024] [Indexed: 08/22/2024] Open
Abstract
Diabetic cardiomyopathy (DCM) is a common complication of diabetes, and its pathogenesis remains elusive. Ferroptosis, a process dependent on iron-mediated cell death, plays a crucial role in DCM via disrupted iron metabolism, lipid peroxidation, and weakened antioxidant defenses. Hyperglycemia, oxidative stress, and inflammation may exacerbate ferroptosis in diabetes. This review emphasizes the interaction between cardiac fibroblasts and cardiomyocytes in DCM, influencing ferroptosis occurrence. By exploring ferroptosis modulation for potential therapeutic targets, this article offers a fresh perspective on DCM treatment. The study systematically covers the interplay, mechanisms, and targeted drugs linked to ferroptosis in DCM development.
Collapse
Affiliation(s)
| | | | - Ning Zhang
- Department of Cardiology, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Haichu Yu
- Department of Cardiology, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| |
Collapse
|
5
|
Das E, Sahu KK, Roy I. The functional role of Ire1 in regulating autophagy and proteasomal degradation under prolonged proteotoxic stress. FEBS J 2023. [PMID: 36757110 DOI: 10.1111/febs.16747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 12/23/2022] [Accepted: 02/08/2023] [Indexed: 02/10/2023]
Abstract
Inhibition of endoribonuclease/kinase Ire1 has shown beneficial effects in many proteotoxicity-induced pathology models. The mechanism by which this occurs has not been elucidated completely. Using a proteotoxic yeast model of Huntington's disease, we show that the deletion of Ire1 led to lower protein aggregation at longer time points. The rate of protein degradation was higher in ΔIre1 cells. We monitored the two major protein degradation mechanisms in the cell. The increase in expression of Rpn4, coding for the transcription factor controlling proteasome biogenesis, was higher in ΔIre1 cells. The chymotrypsin-like proteasomal activity was also significantly enhanced in these cells at later time points of aggregation. The gene and protein expression levels of the autophagy gene Atg8 were higher in ΔIre1 than in wild-type cells. Significant increase in autophagy flux was also seen in ΔIre1 cells at later time points of aggregation. The results suggest that the deletion of Ire1 activates UPR-independent arms of the proteostasis network, especially under conditions of aggravated stress. Thus, the inhibition of Ire1 may regulate UPR-independent cellular stress-response pathways under prolonged stress.
Collapse
Affiliation(s)
- Eshita Das
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, India
| | - Kiran Kumari Sahu
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, India
| | - Ipsita Roy
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, S.A.S. Nagar, India
| |
Collapse
|
6
|
Baeken MW, Yokobayashi Y. Identification of an ERN1 target site within EGFP mRNA. J Cell Biochem 2022; 123:1298-1305. [PMID: 35908204 PMCID: PMC9544080 DOI: 10.1002/jcb.30314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 11/17/2022]
Abstract
EGFP (enhanced green fluorescent protein) is one of the most common tools used in life sciences, including research focusing on proteostasis. Here we report that ERN1 (endoplasmic reticulum to nucleus signaling 1), which is upregulated by UPR (unfolded protein response), targets an RNA hairpin loop motif in EGFP mRNA. A silent mutation introduced into EGFP mRNA abolished the ERN1‐dependent mRNA decay. Therefore, experiments that employ EGFP as a reporter gene in studies that involve upregulation of the UPR pathway should be interpreted carefully, and a mutant devoid of the ERN1 target motif may be more suitable for such studies.
Collapse
Affiliation(s)
- Marius W Baeken
- Nucleic Acid Chemistry and Engineering Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| | - Yohei Yokobayashi
- Nucleic Acid Chemistry and Engineering Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan
| |
Collapse
|
7
|
Hull-Ryde EA, Minges JT, Martino MEB, Kato T, Norris-Drouin JL, Ribeiro CMP. IRE1α Is a Therapeutic Target for Cystic Fibrosis Airway Inflammation. Int J Mol Sci 2021; 22:3063. [PMID: 33802742 PMCID: PMC8002512 DOI: 10.3390/ijms22063063] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/14/2021] [Accepted: 03/15/2021] [Indexed: 12/15/2022] Open
Abstract
New anti-inflammatory treatments are needed for CF airway disease. Studies have implicated the endoplasmic reticulum stress transducer inositol requiring enzyme 1α (IRE1α) in CF airway inflammation. The activation of IRE1α promotes activation of its cytoplasmic kinase and RNase, resulting in mRNA splicing of X-box binding protein-1 (XBP-1s), a transcription factor required for cytokine production. We tested whether IRE1α kinase and RNase inhibition decreases cytokine production induced by the exposure of primary cultures of homozygous F508del CF human bronchial epithelia (HBE) to supernatant of mucopurulent material (SMM) from CF airways. We evaluated whether IRE1α expression is increased in freshly isolated and native CF HBE, and couples with increased XBP-1s levels. A FRET assay confirmed binding of the IRE1α kinase and RNase inhibitor, KIRA6, to the IRE1α kinase. F508del HBE cultures were exposed to SMM with or without KIRA6, and we evaluated the mRNA levels of XBP-1s, IL-6, and IL-8, and the secretion of IL-6 and IL-8. IRE1α mRNA levels were up-regulated in freshly isolated CF vs. normal HBE and coupled to increased XBP-1s mRNA levels. SMM increased XBP-1s, IL-6, and IL-8 mRNA levels and up-regulated IL-6 and IL-8 secretion, and KIRA6 blunted these responses in a dose-dependent manner. Moreover, a triple combination of CFTR modulators currently used in the clinic had no effect on SMM-increased XBP-1s levels coupled with increased cytokine production in presence or absence of KIRA6. These findings indicate that IRE1α mediates cytokine production in CF airways. Small molecule IRE1α kinase inhibitors that allosterically reduce RNase-dependent XBP-1s may represent a new therapeutic strategy for CF airway inflammation.
Collapse
Affiliation(s)
- Emily A. Hull-Ryde
- Marsico Lung Institute and Cystic Fibrosis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA; (E.A.H.-R.); (J.T.M.); (M.E.B.M.); (T.K.)
| | - John T. Minges
- Marsico Lung Institute and Cystic Fibrosis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA; (E.A.H.-R.); (J.T.M.); (M.E.B.M.); (T.K.)
| | - Mary E. B. Martino
- Marsico Lung Institute and Cystic Fibrosis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA; (E.A.H.-R.); (J.T.M.); (M.E.B.M.); (T.K.)
| | - Takafumi Kato
- Marsico Lung Institute and Cystic Fibrosis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA; (E.A.H.-R.); (J.T.M.); (M.E.B.M.); (T.K.)
| | - Jacqueline L. Norris-Drouin
- Center for Integrative Chemical Biology and Drug Discovery, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA;
| | - Carla M. P. Ribeiro
- Marsico Lung Institute and Cystic Fibrosis Research Center, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA; (E.A.H.-R.); (J.T.M.); (M.E.B.M.); (T.K.)
- Division of Pulmonary Diseases, Department of Medicine, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Cell Biology and Physiology, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
| |
Collapse
|