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Kalailingam P, Mohd‐Kahliab K, Ngan SC, Iyappan R, Melekh E, Lu T, Zien GW, Sharma B, Guo T, MacNeil AJ, MacPherson REK, Tsiani EL, O'Leary DD, Lim KL, Su IH, Gao Y, Richards AM, Kalaria RN, Chen CP, McCarthy NE, Sze SK. Immunotherapy targeting isoDGR-protein damage extends lifespan in a mouse model of protein deamidation. EMBO Mol Med 2023; 15:e18526. [PMID: 37971164 PMCID: PMC10701600 DOI: 10.15252/emmm.202318526] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 10/21/2023] [Accepted: 10/31/2023] [Indexed: 11/19/2023] Open
Abstract
Aging results from the accumulation of molecular damage that impairs normal biochemical processes. We previously reported that age-linked damage to amino acid sequence NGR (Asn-Gly-Arg) results in "gain-of-function" conformational switching to isoDGR (isoAsp-Gly-Arg). This integrin-binding motif activates leukocytes and promotes chronic inflammation, which are characteristic features of age-linked cardiovascular disorders. We now report that anti-isoDGR immunotherapy mitigates lifespan reduction of Pcmt1-/- mouse. We observed extensive accumulation of isoDGR and inflammatory cytokine expression in multiple tissues from Pcmt1-/- and naturally aged WT animals, which could also be induced via injection of isoDGR-modified plasma proteins or synthetic peptides into young WT animals. However, weekly injection of anti-isoDGR mAb (1 mg/kg) was sufficient to significantly reduce isoDGR-protein levels in body tissues, decreased pro-inflammatory cytokine concentrations in blood plasma, improved cognition/coordination metrics, and extended the average lifespan of Pcmt1-/- mice. Mechanistically, isoDGR-mAb mediated immune clearance of damaged isoDGR-proteins via antibody-dependent cellular phagocytosis (ADCP). These results indicate that immunotherapy targeting age-linked protein damage may represent an effective intervention strategy in a range of human degenerative disorders.
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Affiliation(s)
| | | | - SoFong Cam Ngan
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
| | - Ranjith Iyappan
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
| | - Evelin Melekh
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
| | - Tian Lu
- iMarker Lab, Westlake Laboratory of Life Sciences and Biomedicine, Key Laboratory of Structural Biology of Zhejiang Province, School of Life SciencesWestlake UniversityHangzhouChina
| | - Gan Wei Zien
- School of Biological SciencesNanyang Technological UniversitySingaporeSingapore
| | - Bhargy Sharma
- School of Biological SciencesNanyang Technological UniversitySingaporeSingapore
| | - Tiannan Guo
- iMarker Lab, Westlake Laboratory of Life Sciences and Biomedicine, Key Laboratory of Structural Biology of Zhejiang Province, School of Life SciencesWestlake UniversityHangzhouChina
| | - Adam J MacNeil
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
| | - Rebecca EK MacPherson
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
| | - Evangelia Litsa Tsiani
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
| | - Deborah D O'Leary
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
| | - Kah Leong Lim
- Lee Kong Chian School of MedicineNanyang Technological UniversitySingaporeSingapore
| | - I Hsin Su
- School of Biological SciencesNanyang Technological UniversitySingaporeSingapore
| | - Yong‐Gui Gao
- School of Biological SciencesNanyang Technological UniversitySingaporeSingapore
| | - A Mark Richards
- Department of CardiologyNational University Heart CentreSingaporeSingapore
- Department of CardiologyUniversity of OtagoChristchurchNew Zealand
| | - Raj N Kalaria
- Institute of Neuroscience, Campus for Ageing and VitalityNewcastle UniversityNewcastle upon TyneUK
| | - Christopher P Chen
- Memory, Aging and Cognition CentreNational University Health SystemSingaporeSingapore
| | - Neil E McCarthy
- Centre for Immunobiology, The Blizard Institute, Bart's and The London School of Medicine and DentistryQueen Mary University of LondonLondonUK
| | - Siu Kwan Sze
- School of Biological SciencesNanyang Technological UniversitySingaporeSingapore
- Department of Health Sciences, Faculty of Applied Health SciencesBrock UniversitySt. CatharinesONCanada
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Stauch KL, Totusek S, Trease AJ, Estrella LD, Emanuel K, Fangmeier A, Fox HS. Longitudinal in vivo metabolic labeling reveals tissue-specific mitochondrial proteome turnover rates and proteins selectively altered by parkin deficiency. Sci Rep 2023; 13:11414. [PMID: 37452120 PMCID: PMC10349111 DOI: 10.1038/s41598-023-38484-0] [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: 10/17/2022] [Accepted: 07/09/2023] [Indexed: 07/18/2023] Open
Abstract
Our study utilizes a longitudinal isotopic metabolic labeling approach in vivo in combination with organelle fraction proteomics to address the role of parkin in mitochondrial protein turnover in mice. The use of metabolic labeling provides a method to quantitatively determine the global changes in protein half-lives whilst simultaneously assessing protein expression. Studying two diverse mitochondrial populations, we demonstrated the median half-life of brain striatal synaptic mitochondrial proteins is significantly greater than that of hepatic mitochondrial proteins (25.7 vs. 3.5 days). Furthermore, loss of parkin resulted in an overall, albeit modest, increase in both mitochondrial protein abundance and half-life. Pathway and functional analysis of our proteomics data identified both known and novel pathways affected by loss of parkin that are consistent with its role in both mitochondrial quality control and neurodegeneration. Our study therefore adds to a growing body of evidence suggesting dependence on parkin is low for basal mitophagy in vivo and provides a foundation for the investigation of novel parkin targets.
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Affiliation(s)
- K L Stauch
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - S Totusek
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - A J Trease
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - L D Estrella
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - K Emanuel
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - A Fangmeier
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA
| | - H S Fox
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, NE, USA.
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Soliman R, Cordero-Maldonado ML, Martins TG, Moein M, Conrotte JF, Warmack RA, Skupin A, Crawford AD, Clarke SG, Linster CL. l-Isoaspartyl Methyltransferase Deficiency in Zebrafish Leads to Impaired Calcium Signaling in the Brain. Front Genet 2021; 11:612343. [PMID: 33552132 PMCID: PMC7859441 DOI: 10.3389/fgene.2020.612343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 12/21/2020] [Indexed: 11/13/2022] Open
Abstract
Isomerization of l-aspartyl and l-asparaginyl residues to l-isoaspartyl residues is one type of protein damage that can occur under physiological conditions and leads to conformational changes, loss of function, and enhanced protein degradation. Protein l-isoaspartyl methyltransferase (PCMT) is a repair enzyme whose action initiates the reconversion of abnormal l-isoaspartyl residues to normal l-aspartyl residues in proteins. Many lines of evidence support a crucial role for PCMT in the brain, but the mechanisms involved remain poorly understood. Here, we investigated PCMT activity and function in zebrafish, a vertebrate model that is particularly well-suited to analyze brain function using a variety of techniques. We characterized the expression products of the zebrafish PCMT homologous genes pcmt and pcmtl. Both zebrafish proteins showed a robust l-isoaspartyl methyltransferase activity and highest mRNA transcript levels were found in brain and testes. Zebrafish morphant larvae with a knockdown in both the pcmt and pcmtl genes showed pronounced morphological abnormalities, decreased survival, and increased isoaspartyl levels. Interestingly, we identified a profound perturbation of brain calcium homeostasis in these morphants. An abnormal calcium response upon ATP stimulation was also observed in mouse hippocampal HT22 cells knocked out for Pcmt1. This work shows that zebrafish is a promising model to unravel further facets of PCMT function and demonstrates, for the first time in vivo, that PCMT plays a pivotal role in the regulation of calcium fluxes.
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Affiliation(s)
- Remon Soliman
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | - Teresa G Martins
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Mahsa Moein
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jean-François Conrotte
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Rebeccah A Warmack
- Department of Chemistry and Biochemistry, The Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States
| | - Alexander Skupin
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg.,University of California, San Diego, La Jolla, CA, United States
| | - Alexander D Crawford
- Department of Preclinical Sciences and Pathology, Norwegian University of Life Sciences, Oslo, Norway.,Institute for Orphan Drug Discovery, Bremer Innovations- und Technologiezentrum, Bremen, Germany
| | - Steven G Clarke
- Department of Chemistry and Biochemistry, The Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States
| | - Carole L Linster
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
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Yamashita M, Ogasawara M, Kawasaki Y, Niisato M, Saito H, Kasai S, Maesawa C, Maemondo M, Yamauchi K. Deficiency of protein-L-isoaspartate (D-aspartate) O-methyl-transferase expression under endoplasmic reticulum stress promotes epithelial mesenchymal transition in lung adenocarcinoma. Oncotarget 2018; 9:13287-13300. [PMID: 29568357 PMCID: PMC5862578 DOI: 10.18632/oncotarget.24324] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 01/19/2018] [Indexed: 11/25/2022] Open
Abstract
A prognostic association between the novel chaperone protein-L-isoaspartate (D-aspartate) O-methyltransferase (PIMT) and lung adenocarcinoma has recently been reported. Here, we evaluated the functional roles of PIMT in the progression of lung adenocarcinoma. PIMT expression was detectable in 6 lung adenocarcinoma cell lines: A549, H441, H460, H1650, Calu 1, and Calu 6 cell lines. In A549 and H441 cells, knockdown by PIMT using silencing RNA of PIMT (si-PIMT) and/or small hairpin-RNA (sh-PIMT) induced a decrease in the expression of E-cadherin with an increase in vimentin expression, indicating that the epithelial to mesenchymal transition (EMT) was induced. Cell mobility, including migration and invasion capability, was increased in sh-PIMT A549 stable and si-PIMT H441 cells compared to in control cells. Endoplasmic reticulum (ER) stress, such as Thapsigargin (Tg) stress and hypoxia, induced EMT in A549 cells but not in other cell types, with an increase in GRP78 expression, whereas overexpression of PIMT reduced the EMT and cell invasion under stress conditions. The expression of hypoxia inducible factor-1 alpha (HIF1α) and Twist increased in sh-PIMT A549 and si-PIMT H441 cells, and Tg stress increased HIF1α expression levels in A549 cells in a dose-dependent manner. Moreover, LW6, an HIF1α inhibitor, reduced EMT, cancer invasion, and the levels of Twist in sh-PIMT A549 cells. Our results indicate that deficiency of supplemental PIMT expression under ER stress facilitates EMT and cell invasion in some cell types of lung adenocarcinoma.
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Affiliation(s)
- Masahiro Yamashita
- Department of Pulmonary Medicine, Allergy and Immunological Diseases, School of Medicine, Iwate Medical University, Morioka, Iwate, Japan
| | - Masahito Ogasawara
- Department of Pharmacology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Yasushi Kawasaki
- Department of Health Chemistry, School of Pharmacology, Iwate Medical University, Shiwa, Iwate, Japan
| | - Miyuki Niisato
- Department of Pulmonary Medicine, Allergy and Immunological Diseases, School of Medicine, Iwate Medical University, Morioka, Iwate, Japan
| | - Heisuke Saito
- Department of Pulmonary Medicine, Allergy and Immunological Diseases, School of Medicine, Iwate Medical University, Morioka, Iwate, Japan
| | - Shuya Kasai
- Department of Cancer Biology, Iwate Medical University, Shiwa, Iwate, Japan
- Department of Biomolecular Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi, Japan
| | - Chihaya Maesawa
- Department of Cancer Biology, Iwate Medical University, Shiwa, Iwate, Japan
| | - Makoto Maemondo
- Department of Pulmonary Medicine, Allergy and Immunological Diseases, School of Medicine, Iwate Medical University, Morioka, Iwate, Japan
| | - Kohei Yamauchi
- Department of Pulmonary Medicine, Allergy and Immunological Diseases, School of Medicine, Iwate Medical University, Morioka, Iwate, Japan
- Geriatric Health Services Facilities, Keiyu, Morioka, Japan
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