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Murata E, Yoshida T, Tomaru U, Yamamoto S, Fukui-Miyazaki A, Ishizu A, Kasahara M. Decreased proteasome function increases oxidative stress in the early stage of pressure ulcer development. Exp Mol Pathol 2024; 137:104891. [PMID: 38462206 DOI: 10.1016/j.yexmp.2024.104891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/08/2024] [Accepted: 03/07/2024] [Indexed: 03/12/2024]
Abstract
The aging process in the elderly results in heightened skin fragility associated with various disorders, including pressure ulcers (PUs). Despite the high incidence of PUs in the elderly population, there is a limited body of research specifically examining the impact of aging on the development of pressure ulcers. Therefore, investigating age-related physiological abnormalities is essential to elucidate the pathogenesis of PUs. Ischemia-reperfusion (I/R) injury and the subsequent oxidative stress caused by reactive oxygen species (ROS) play essential roles in the early stage of PUs. In this study, we used a mouse model of proteasomal dysfunction with an age-related phenotype to examine the role of proteasome activity in cutaneous I/R injury in vivo. Decreased proteasome function did not affect the expression of inflammatory cytokines and adhesion molecules in the I/R area in transgenic mice; however, proteasome inhibition increased oxidative stress that was not attenuated by activation of the oxidative stress response mediated by NF-E2-related factor 2 (Nrf2). In dermal fibroblasts (FCs) subjected to hypoxia-reoxygenation (H/R), proteasome inhibition induced oxidative stress and ROS production, and Nrf2 activation did not adequately upregulate antioxidant enzyme expression, possibly leading to antioxidant/oxidant imbalance. The free radical scavenger edaravone had protective effects against I/R injury in vivo and decreased oxidative stress in FCs treated with a proteasome inhibitor and subjected to H/R in vitro. The results suggest that the age-related decline in proteasome activity promotes cutaneous I/R injury-induced oxidative stress, and free radical scavengers may exert protective effects by preventing oxidative stress in the early stage of PUs.
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Affiliation(s)
- Eri Murata
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-ku, Sapporo, Japan; Department of Fundamental Nursing, Yamagata University Graduate School of Nursing, Yamagata, Yamagata, Japan
| | - Takuma Yoshida
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-ku, Sapporo, Japan
| | - Utano Tomaru
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-ku, Sapporo, Japan; Department of Surgical Pathology, Hokkaido University Hospital, Sapporo 060-8648, Japan.
| | - Saaki Yamamoto
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-ku, Sapporo, Japan
| | - Aya Fukui-Miyazaki
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Kita-ku, Sapporo, Japan
| | - Akihiro Ishizu
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Kita-ku, Sapporo, Japan
| | - Masanori Kasahara
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita-ku, Sapporo, Japan
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2
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Nakagawa S, Fukui-Miyazaki A, Yoshida T, Ishii Y, Murata E, Taniguchi K, Ishizu A, Kasahara M, Tomaru U. Decreased Proteasomal Function Exacerbates Endoplasmic Reticulum Stress-Induced Chronic Inflammation in Obese Adipose Tissue. THE AMERICAN JOURNAL OF PATHOLOGY 2024:S0002-9440(24)00076-2. [PMID: 38423355 DOI: 10.1016/j.ajpath.2024.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 01/24/2024] [Accepted: 02/15/2024] [Indexed: 03/02/2024]
Abstract
Low-grade chronic inflammation contributes to both aging and the pathogenesis of age-related diseases. White adipose tissue (WAT) in obese individuals exhibits chronic inflammation, which is associated with obesity-related disorders. Aging exacerbates obesity-related inflammation in WAT; however, the molecular mechanisms underlying chronic inflammation and its exacerbation by aging remain unclear. Age-related decline in activity of the proteasome, a multisubunit proteolytic complex, has been implicated in age-related diseases. This study employed a mouse model with decreased proteasomal function that exhibits age-related phenotypes to investigate the impact of adipocyte senescence on WAT inflammation. Transgenic mice expressing proteasomal subunit β5t with weak chymotrypsin-like activity experience reduced lifespan and develop age-related phenotypes. Mice fed with a high-fat diet and experiencing proteasomal dysfunction exhibited increased WAT inflammation, increased infiltration of proinflammatory M1-like macrophages, and increased proinflammatory adipocytokine-like monocyte chemoattractant protein-1, plasminogen activator inhibitor-1, and tumor necrosis factor-α, which are all associated with activation of endoplasmic reticulum (ER) stress-related pathways. Impaired proteasomal activity also activated ER stress-related molecules and induced expression of proinflammatory adipocytokines in adipocyte-like cells differentiated from 3T3-L1 cells. Collective evidence suggests that impaired proteasomal activity increases ER stress and that subsequent inflammatory pathways play pivotal roles in WAT inflammation. Because proteasomal function declines with age, age-related proteasome impairment may be involved in obesity-related inflammation among elderly individuals.
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Affiliation(s)
- Shimpei Nakagawa
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Aya Fukui-Miyazaki
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Takuma Yoshida
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yasushi Ishii
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Eri Murata
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan; Department of Fundamental Nursing, School of Nursing, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - Koji Taniguchi
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akihiro Ishizu
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Masanori Kasahara
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Utano Tomaru
- Department of Pathology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan; Department of Surgical Pathology, Hokkaido University Hospital, Sapporo, Japan.
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3
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Mohammed OA, Abdel-Reheim MA, Saleh LA, Alamri MMS, Alfaifi J, Adam MIE, Farrag AA, AlQahtani AAJ, BinAfif WF, Hashish AA, Abdel-Ghany S, Elmorsy EA, El-wakeel HS, Doghish AS, Hamad RS, Saber S. Alvespimycin Exhibits Potential Anti-TGF-β Signaling in the Setting of a Proteasome Activator in Rats with Bleomycin-Induced Pulmonary Fibrosis: A Promising Novel Approach. Pharmaceuticals (Basel) 2023; 16:1123. [PMID: 37631038 PMCID: PMC10458542 DOI: 10.3390/ph16081123] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is an irreversible and life-threatening lung disease of unknown etiology presenting only a few treatment options. TGF-β signaling orchestrates a cascade of events driving pulmonary fibrosis (PF). Notably, recent research has affirmed the augmentation of TGF-β receptor (TβR) signaling via HSP90 activation. HSP90, a molecular chaperone, adeptly stabilizes and folds TβRs, thus intricately regulating TGF-β1 signaling. Our investigation illuminated the impact of alvespimycin, an HSP90 inhibitor, on TGF-β-mediated transcriptional responses by inducing destabilization of TβRs. This outcome stems from the explicit interaction of TβR subtypes I and II with HSP90, where they are clients of this cellular chaperone. It is worth noting that regulation of proteasome-dependent degradation of TβRs is a critical standpoint in the termination of TGF-β signal transduction. Oleuropein, the principal bioactive compound found in Olea europaea, is acknowledged for its role as a proteasome activator. In this study, our aim was to explore the efficacy of a combined therapy involving oleuropein and alvespimycin for the treatment of PF. We employed a PF rat model that was induced by intratracheal bleomycin infusion. The application of this dual therapy yielded a noteworthy impediment to the undesired activation of TGF-β/mothers against decapentaplegic homologs 2 and 3 (SMAD2/3) signaling. Consequently, this novel combination showcased improvements in both lung tissue structure and function while also effectively restraining key fibrosis markers such as PDGF-BB, TIMP-1, ACTA2, col1a1, and hydroxyproline. On a mechanistic level, our findings unveiled that the antifibrotic impact of this combination therapy likely stemmed from the enhanced degradation of both TβRI and TβRII. In conclusion, the utilization of proteasomal activators in conjunction with HSP90 inhibitors ushers in a promising frontier for the management of PF.
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Affiliation(s)
- Osama A. Mohammed
- Department of Clinical Pharmacology, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia
| | - Mustafa Ahmed Abdel-Reheim
- Department of Pharmaceutical Sciences, College of Pharmacy, Shaqra University, Shaqra 11961, Saudi Arabia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Beni-Suef University, Beni Suef 62521, Egypt
| | - Lobna A. Saleh
- Department of Clinical Pharmacology, Faculty of Medicine, Ain Shams University, Cairo 11566, Egypt;
- Department of Pharmacology and Toxicology, College of Pharmacy, Taif University, Taif 21944, Saudi Arabia
| | | | - Jaber Alfaifi
- Department of Child Health, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia;
| | - Masoud I. E. Adam
- Department of Medical Education and Internal Medicine, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia;
| | - Alshaimaa A. Farrag
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut 71515, Egypt;
- Unit of Anatomy, Department of Basic Medical Sciences, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia
| | - AbdulElah Al Jarallah AlQahtani
- Department of Internal Medicine, Division of Dermatology, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia;
| | - Waad Fuad BinAfif
- Department of Internal Medicine, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia;
| | - Abdullah A. Hashish
- Department of Basic Medical Sciences, College of Medicine, University of Bisha, Bisha 61922, Saudi Arabia;
- Department of Clinical Pathology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Sameh Abdel-Ghany
- Department of Clinical Pharmacology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt; (S.A.-G.); (E.A.E.)
| | - Elsayed A. Elmorsy
- Department of Clinical Pharmacology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt; (S.A.-G.); (E.A.E.)
- Pharmacology and Therapeutics Department, Qassim College of Medicine, Qassim University, Buraydah 51452, Saudi Arabia
| | - Hend S. El-wakeel
- Physiology Department, Benha Faculty of Medicine, Benha University, Benha 13518, Egypt;
- Physiology Department, Albaha Faculty of Medicine, Albaha University, Al Baha 65799, Saudi Arabia
| | - Ahmed S. Doghish
- Department of Biochemistry, Faculty of Pharmacy, Badr University in Cairo, Cairo 11829, Egypt;
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy (Boys), Al-Azhar University, Cairo 11231, Egypt
| | - Rabab S. Hamad
- Biological Sciences Department, College of Science, King Faisal University, Al Ahsa 31982, Saudi Arabia;
- Central Laboratory, Theodor Bilharz Research Institute, Giza 12411, Egypt
| | - Sameh Saber
- Department of Pharmacology, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa 11152, Egypt
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4
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Cordeiro Y, Freire MHO, Wiecikowski AF, do Amaral MJ. (Dys)functional insights into nucleic acids and RNA-binding proteins modulation of the prion protein and α-synuclein phase separation. Biophys Rev 2023; 15:577-589. [PMID: 37681103 PMCID: PMC10480379 DOI: 10.1007/s12551-023-01067-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 05/22/2023] [Indexed: 09/09/2023] Open
Abstract
Prion diseases are prototype of infectious diseases transmitted by a protein, the prion protein (PrP), and are still not understandable at the molecular level. Heterogenous species of aggregated PrP can be generated from its monomer. α-synuclein (αSyn), related to Parkinson's disease, has also shown a prion-like pathogenic character, and likewise PrP interacts with nucleic acids (NAs), which in turn modulate their aggregation. Recently, our group and others have characterized that NAs and/or RNA-binding proteins (RBPs) modulate recombinant PrP and/or αSyn condensates formation, and uncontrolled condensation might precede pathological aggregation. Tackling abnormal phase separation of neurodegenerative disease-related proteins has been proposed as a promising therapeutic target. Therefore, understanding the mechanism by which polyanions, like NAs, modulate phase transitions intracellularly, is key to assess their role on toxicity promotion and neuronal death. Herein we discuss data on the nucleic acids binding properties and phase separation ability of PrP and αSyn with a special focus on their modulation by NAs and RBPs. Furthermore, we provide insights into condensation of PrP and/or αSyn in the light of non-trivial subcellular locations such as the nuclear and cytosolic environments.
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Affiliation(s)
- Yraima Cordeiro
- Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Av Carlos Chagas Filho 373, bloco B, subsolo Sala 36, Rio de Janeiro, RJ 21941-902 Brazil
| | - Maria Heloisa O. Freire
- Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Av Carlos Chagas Filho 373, bloco B, subsolo Sala 36, Rio de Janeiro, RJ 21941-902 Brazil
| | - Adalgisa Felippe Wiecikowski
- Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Av Carlos Chagas Filho 373, bloco B, subsolo Sala 36, Rio de Janeiro, RJ 21941-902 Brazil
| | - Mariana Juliani do Amaral
- Faculty of Pharmacy, Universidade Federal do Rio de Janeiro, Av Carlos Chagas Filho 373, bloco B, subsolo Sala 36, Rio de Janeiro, RJ 21941-902 Brazil
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Pan CC, Maeso-Díaz R, Lewis TR, Xiang K, Tan L, Liang Y, Wang L, Yang F, Yin T, Wang C, Du K, Huang D, Oh SH, Wang E, Lim BJW, Chong M, Alexander PB, Yao X, Arshavsky VY, Li QJ, Diehl AM, Wang XF. Antagonizing the irreversible thrombomodulin-initiated proteolytic signaling alleviates age-related liver fibrosis via senescent cell killing. Cell Res 2023; 33:516-532. [PMID: 37169907 PMCID: PMC10313785 DOI: 10.1038/s41422-023-00820-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Accepted: 04/10/2023] [Indexed: 05/13/2023] Open
Abstract
Cellular senescence is a stress-induced, stable cell cycle arrest phenotype which generates a pro-inflammatory microenvironment, leading to chronic inflammation and age-associated diseases. Determining the fundamental molecular pathways driving senescence instead of apoptosis could enable the identification of senolytic agents to restore tissue homeostasis. Here, we identify thrombomodulin (THBD) signaling as a key molecular determinant of the senescent cell fate. Although normally restricted to endothelial cells, THBD is rapidly upregulated and maintained throughout all phases of the senescence program in aged mammalian tissues and in senescent cell models. Mechanistically, THBD activates a proteolytic feed-forward signaling pathway by stabilizing a multi-protein complex in early endosomes, thus forming a molecular basis for the irreversibility of the senescence program and ensuring senescent cell viability. Therapeutically, THBD signaling depletion or inhibition using vorapaxar, an FDA-approved drug, effectively ablates senescent cells and restores tissue homeostasis in liver fibrosis models. Collectively, these results uncover proteolytic THBD signaling as a conserved pro-survival pathway essential for senescent cell viability, thus providing a pharmacologically exploitable senolytic target for senescence-associated diseases.
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Affiliation(s)
- Christopher C Pan
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Raquel Maeso-Díaz
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, NC, USA
| | - Tylor R Lewis
- Division of Ophthalmology, Department of Medicine, Duke University, Durham, NC, USA
| | - Kun Xiang
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Lianmei Tan
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Yaosi Liang
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Liuyang Wang
- Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA
| | - Fengrui Yang
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Tao Yin
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Calvin Wang
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Kuo Du
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, NC, USA
| | - De Huang
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Seh Hoon Oh
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, NC, USA
| | - Ergang Wang
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | | | - Mengyang Chong
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Peter B Alexander
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Xuebiao Yao
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Vadim Y Arshavsky
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
- Division of Ophthalmology, Department of Medicine, Duke University, Durham, NC, USA
| | - Qi-Jing Li
- Department of Immunology, Duke University, Durham, NC, USA
| | - Anna Mae Diehl
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, NC, USA
| | - Xiao-Fan Wang
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA.
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6
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Yamada Y. Histogenetic and disease-relevant phenotypes in thymic epithelial tumors (TETs): The potential significance for future TET classification. Pathol Int 2023; 73:265-280. [PMID: 37278579 DOI: 10.1111/pin.13343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/18/2023] [Indexed: 06/07/2023]
Abstract
Thymic epithelial tumors (TETs) encompass morphologically various subtypes. Thus, it would be meaningful to explore the expression phenotypes that delineate each TET subtype or overarching multiple subtypes. If these profiles are related to thymic physiology, they will improve our biological understanding of TETs and may contribute to the establishment of a more rational TET classification. Against this background, pathologists have attempted to identify histogenetic features in TETs for a long time. As part of this work, our group has reported several TET expression profiles that are histotype-dependent and related to the nature of thymic epithelial cells (TECs). For example, we found that beta5t, a constituent of thymoproteasome unique to cortical TECs, is expressed mainly in type B thymomas, for which the nomenclature of cortical thymoma was once considered. Another example is the discovery that most thymic carcinomas, especially thymic squamous cell carcinomas, exhibit expression profiles similar to tuft cells, a recently discovered special type of medullary TEC. This review outlines the currently reported histogenetic phenotypes of TETs, including those related to thymoma-associated myasthenia gravis, summarizes their genetic signatures, and provides a perspective for the future direction of TET classification.
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Affiliation(s)
- Yosuke Yamada
- Department of Diagnostic Pathology, Kyoto University Hospital, Kyoto, Japan
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7
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Rovira M, Sereda R, Pladevall‐Morera D, Ramponi V, Marin I, Maus M, Madrigal‐Matute J, Díaz A, García F, Muñoz J, Cuervo AM, Serrano M. The lysosomal proteome of senescent cells contributes to the senescence secretome. Aging Cell 2022; 21:e13707. [PMID: 36087066 PMCID: PMC9577959 DOI: 10.1111/acel.13707] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 08/01/2022] [Accepted: 08/13/2022] [Indexed: 01/31/2023] Open
Abstract
Senescent cells accumulate in tissues over time, favoring the onset and progression of multiple age-related diseases. Senescent cells present a remarkable increase in lysosomal mass and elevated autophagic activity. Here, we report that two main autophagic pathways macroautophagy (MA) and chaperone-mediated autophagy (CMA) are constitutively upregulated in senescent cells. Proteomic analyses of the subpopulations of lysosomes preferentially engaged in each of these types of autophagy revealed profound quantitative and qualitative changes in senescent cells, affecting both lysosomal resident proteins and cargo proteins delivered to lysosomes for degradation. These studies have led us to identify resident lysosomal proteins that are highly augmented in senescent cells and can be used as novel markers of senescence, such as arylsulfatase ARSA. The abundant secretome of senescent cells, known as SASP, is considered their main pathological mediator; however, little is known about the mechanisms of SASP secretion. Some secretory cells, including melanocytes, use the small GTPase RAB27A to perform lysosomal secretion. We found that this process is exacerbated in the case of senescent melanoma cells, as revealed by the exposure of lysosomal membrane integral proteins LAMP1 and LAMP2 in their plasma membrane. Interestingly, a subset of SASP components, including cytokines CCL2, CCL3, CXCL12, cathepsin CTSD, or the protease inhibitor SERPINE1, are secreted in a RAB27A-dependent manner in senescent melanoma cells. Finally, proteins previously identified as plasma biomarkers of aging are highly enriched in the lysosomes of senescent cells, including CTSD. We conclude that the lysosomal proteome of senescent cells is profoundly reconfigured, and that some senescent cells can be highly active in lysosomal exocytosis.
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Affiliation(s)
- Miguel Rovira
- Cellular Plasticity and Disease GroupInstitute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
| | - Rebecca Sereda
- Department of Developmental and Molecular BiologyAlbert Einstein College of MedicineNew YorkNew YorkUSA
- Institute for Aging StudiesAlbert Einstein College of MedicineNew YorkNew YorkUSA
| | - David Pladevall‐Morera
- Department of Cellular and Molecular Medicine, Center for Chromosome Stability and Center for Healthy AgingUniversity of CopenhagenCopenhagenDenmark
| | - Valentina Ramponi
- Cellular Plasticity and Disease GroupInstitute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
| | - Ines Marin
- Cellular Plasticity and Disease GroupInstitute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
| | - Mate Maus
- Cellular Plasticity and Disease GroupInstitute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
| | - Julio Madrigal‐Matute
- Department of Developmental and Molecular BiologyAlbert Einstein College of MedicineNew YorkNew YorkUSA
- Institute for Aging StudiesAlbert Einstein College of MedicineNew YorkNew YorkUSA
- Instituto Biomédico de Nutrición y SaludEldaSpain
| | - Antonio Díaz
- Department of Developmental and Molecular BiologyAlbert Einstein College of MedicineNew YorkNew YorkUSA
- Institute for Aging StudiesAlbert Einstein College of MedicineNew YorkNew YorkUSA
| | - Fernando García
- Proteomics UnitSpanish National Cancer Research Center (CNIO)MadridSpain
| | - Javier Muñoz
- Proteomics UnitSpanish National Cancer Research Center (CNIO)MadridSpain
- Biocruces Bizkaia Health Research InstituteBarakaldoSpain
- Ikerbasque, Basque Foundation for ScienceBilbaoSpain
| | - Ana María Cuervo
- Department of Developmental and Molecular BiologyAlbert Einstein College of MedicineNew YorkNew YorkUSA
- Institute for Aging StudiesAlbert Einstein College of MedicineNew YorkNew YorkUSA
| | - Manuel Serrano
- Cellular Plasticity and Disease GroupInstitute for Research in Biomedicine (IRB Barcelona), Barcelona Institute of Science and Technology (BIST)BarcelonaSpain
- Catalan Institution for Research and Advanced Studies (ICREA)BarcelonaSpain
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8
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Warnsmann V, Meisterknecht J, Wittig I, Osiewacz HD. Aging of Podospora anserina Leads to Alterations of OXPHOS and the Induction of Non-Mitochondrial Salvage Pathways. Cells 2021; 10:cells10123319. [PMID: 34943827 PMCID: PMC8699231 DOI: 10.3390/cells10123319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 01/19/2023] Open
Abstract
The accumulation of functionally impaired mitochondria is a key event in aging. Previous works with the fungal aging model Podospora anserina demonstrated pronounced age-dependent changes of mitochondrial morphology and ultrastructure, as well as alterations of transcript and protein levels, including individual proteins of the oxidative phosphorylation (OXPHOS). The identified protein changes do not reflect the level of the whole protein complexes as they function in-vivo. In the present study, we investigated in detail the age-dependent changes of assembled mitochondrial protein complexes, using complexome profiling. We observed pronounced age-depen-dent alterations of the OXPHOS complexes, including the loss of mitochondrial respiratory supercomplexes (mtRSCs) and a reduction in the abundance of complex I and complex IV. Additionally, we identified a switch from the standard complex IV-dependent respiration to an alternative respiration during the aging of the P. anserina wild type. Interestingly, we identified proteasome components, as well as endoplasmic reticulum (ER) proteins, for which the recruitment to mitochondria appeared to be increased in the mitochondria of older cultures. Overall, our data demonstrate pronounced age-dependent alterations of the protein complexes involved in energy transduction and suggest the induction of different non-mitochondrial salvage pathways, to counteract the age-dependent mitochondrial impairments which occur during aging.
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Affiliation(s)
- Verena Warnsmann
- Institute of Molecular Biosciences, Faculty of Biosciences, Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
| | - Jana Meisterknecht
- Functional Proteomics, Institute of Cardiovascular Physiology, Faculty of Medicine, Goethe-University, Theodor-Stein-Kai 7, 60590 Frankfurt am Main, Germany
| | - Ilka Wittig
- Functional Proteomics, Institute of Cardiovascular Physiology, Faculty of Medicine, Goethe-University, Theodor-Stein-Kai 7, 60590 Frankfurt am Main, Germany
| | - Heinz D Osiewacz
- Institute of Molecular Biosciences, Faculty of Biosciences, Goethe-University, Max-von-Laue-Str. 9, 60438 Frankfurt, Germany
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9
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Shen Y, Hu H, Fan C, Wang Q, Zou T, Ye B, Xiang M. Sensorineural hearing loss may lead to dementia-related pathological changes in hippocampal neurons. Neurobiol Dis 2021; 156:105408. [PMID: 34082124 DOI: 10.1016/j.nbd.2021.105408] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 05/26/2021] [Accepted: 05/26/2021] [Indexed: 01/23/2023] Open
Abstract
Presbycusis contributes to cognitive decline and Alzheimer's disease. However, most research in this area involves clinical observations and statistical modeling, and few studies have examined the relationship between hearing loss and the molecular changes that lead to cognitive dysfunction. The present study investigated whether hearing loss contributes to dementia in the absence of aging and noise using a mouse model of severe bilateral hearing loss induced by kanamycin (1000 mg/kg) and furosemide (400 mg/kg). Immunohistochemistry, silver staining, immunofluorescence analysis, and Western blotting were used to observe pathological changes in different regions of the hippocampus in animals with hearing loss. Changes in the cognitive function of animals with hearing loss were assessed using the Morris water maze test. The results showed that neurons began to degenerate 60 days after hearing loss, and this degeneration was accompanied by structural disorganization and decreased neurogenesis. The level of phosphorylated tau increased over time. Increases in escape latency and distance traveled during the training phase of the Morris water maze test were observed 90 days after hearing loss. Activated microglia and astrocytes with increased levels of inflammatory cytokines, such as tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) were detected in the hippocampus. These results suggest that hearing loss alone causes neuronal degeneration, inhibition of neurogenesis, increased tau protein phosphorylation, and increased neuroinflammation in the hippocampus. Early intervention in individuals with hearing loss may reduce the risk of cognitive decline.
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Affiliation(s)
- Yilin Shen
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Haixia Hu
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Cui Fan
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Quan Wang
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Tianyuan Zou
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Bin Ye
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China.
| | - Mingliang Xiang
- Department of Otolaryngology & Head and Neck Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China.
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10
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Osiewacz HD, Schürmanns L. A Network of Pathways Controlling Cellular Homeostasis Affects the Onset of Senescence in Podospora anserina. J Fungi (Basel) 2021; 7:jof7040263. [PMID: 33807190 PMCID: PMC8065454 DOI: 10.3390/jof7040263] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 03/28/2021] [Indexed: 01/07/2023] Open
Abstract
Research on Podospora anserina unraveled a network of molecular pathways affecting biological aging. In particular, a number of pathways active in the control of mitochondria were identified on different levels. A long-known key process active during aging of P. anserina is the age-related reorganization of the mitochondrial DNA (mtDNA). Mechanisms involved in the stabilization of the mtDNA lead to lifespan extension. Another critical issue is to balance mitochondrial levels of reactive oxygen species (ROS). This is important because ROS are essential signaling molecules, but at increased levels cause molecular damage. At a higher level of the network, mechanisms are active in the repair of damaged compounds. However, if damage passes critical limits, the corresponding pathways are overwhelmed and impaired molecules as well as those present in excess are degraded by specific enzymes or via different forms of autophagy. Subsequently, degraded units need to be replaced by novel functional ones. The corresponding processes are dependent on the availability of intact genetic information. Although a number of different pathways involved in the control of cellular homeostasis were uncovered in the past, certainly many more exist. In addition, the signaling pathways involved in the control and coordination of the underlying pathways are only initially understood. In some cases, like the induction of autophagy, ROS are active. Additionally, sensing and signaling the energetic status of the organism plays a key role. The precise mechanisms involved are elusive and remain to be elucidated.
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11
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Makino SI, Shirata N, Oliva Trejo JA, Yamamoto-Nonaka K, Yamada H, Miyake T, Mori K, Nakagawa T, Tashiro Y, Yamashita H, Yanagita M, Takahashi R, Asanuma K. Impairment of Proteasome Function in Podocytes Leads to CKD. J Am Soc Nephrol 2021; 32:597-613. [PMID: 33510039 PMCID: PMC7920174 DOI: 10.1681/asn.2019101025] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 11/20/2020] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND The ubiquitin-proteasome system (UPS) and the autophagy-lysosomal system (APLS) are major intracellular degradation procedures. The importance of the APLS in podocytes is established, but the role of the UPS is not well understood. METHODS To investigate the role of the UPS in podocytes, mice were generated that had deletion of Rpt3 (Rpt3pdKO), which encodes an essential regulatory subunit required for construction of the 26S proteasome and its deubiquitinating function. RESULTS Rpt3pdKO mice showed albuminuria and glomerulosclerosis, leading to CKD. Impairment of proteasome function caused accumulation of ubiquitinated proteins and of oxidative modified proteins, and it induced podocyte apoptosis. Although impairment of proteasome function normally induces autophagic activity, the number of autophagosomes was lower in podocytes of Rpt3pdKO mice than in control mice, suggesting the autophagic activity was suppressed in podocytes with impairment of proteasome function. In an in vitro study, antioxidant apocynin and autophagy activator rapamycin suppressed podocyte apoptosis induced by proteasome inhibition. Moreover, rapamycin ameliorated the glomerular injury in the Rpt3pdKO mice. The accumulation of ubiquitinated proteins and of oxidative modified proteins, which were detected in the podocytes of Rpt3pdKO mice, is a characteristic feature of aging. An aging marker was increased in the podocytes of Rpt3pdKO mice, suggesting that impairment of proteasome function promoted signs of aging in podocytes. CONCLUSIONS Impairment of proteasome function in podocytes led to CKD, and antioxidants and autophagy activators can be therapeutic agents for age-dependent CKD.
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Affiliation(s)
- Shin-ichi Makino
- Department of Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan,The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Naritoshi Shirata
- The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Sohyaku, Innovative Research Division, Mitsubishi Tanabe Pharmaceutical Corporation, Saitama, Japan
| | - Juan Alejandro Oliva Trejo
- The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Cellular and Molecular Neuropathology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Kanae Yamamoto-Nonaka
- The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroyuki Yamada
- Department of Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan,The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takafumi Miyake
- The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kiyoshi Mori
- The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Molecular and Clinical Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan,Department of Nephrology, Shizuoka General Hospital, Shizuoka, Japan
| | - Takahiko Nakagawa
- The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Nephrology, Rakuwakai Otowa Hospital, Kyoto, Japan
| | - Yoshitaka Tashiro
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hirofumi Yamashita
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Motoko Yanagita
- The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Department of Nephrology, Graduate School of Medicine, Kyoto University, Kyoto, Japan,Institute for the Advanced Study of Human Biology, Kyoto University, Kyoto, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Katsuhiko Asanuma
- Department of Nephrology, Graduate School of Medicine, Chiba University, Chiba, Japan,The Laboratory for Kidney Research (TMK project), Medical Innovation Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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12
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Tomaru U, Ito T, Ohmura Y, Higashikawa K, Miyajima S, Tomatsu R, Higashi T, Ishizu A, Kuge Y, Yoshioka M, Kasahara M. Decreased Proteasomal Function Induces Neuronal Loss and Memory Impairment. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:144-156. [PMID: 33339546 DOI: 10.1016/j.ajpath.2020.10.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 09/20/2020] [Accepted: 10/06/2020] [Indexed: 12/31/2022]
Abstract
Alzheimer disease (AD) is a progressive neurodegenerative disorder and the most common type of dementia worldwide. There is considerable evidence of age-related disruption of proteostasis being responsible for the development of AD. The proteasome is a multicatalytic enzyme complex that degrades both normal and damaged proteins, and an age-related decline in its activity has been implicated in age-related pathologies. Although proteasomal dysfunction is assumed to be a key AD hallmark, it remains unclear whether its role in disease onset is causative or secondary. In this study, we demonstrate that mice with proteasomal dysfunction exhibited memory impairment with associated neuronal loss, accumulation of phosphorylated tau, and activation of endoplasmic reticulum (ER) stress-related apoptosis pathways. Impaired proteasomal activity also activated ER stress-related apoptosis pathways in HT-22, a murine hippocampal neuronal cell line. HT-22 cell death, caused by proteasomal inhibition, was prevented by an inhibitor of c-Jun N-terminal kinase, an ER stress-related molecule. Collective evidence suggests that impaired proteasomal activity alters proteostasis, and subsequent ER stress-mediated pathways play pivotal roles in neuronal loss. Because aging decreases proteasomal function, age-related impairment of proteasomes may be involved in the development and progression of AD in elderly patients.
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Affiliation(s)
- Utano Tomaru
- Department of Pathology, Hokkaido University, Sapporo, Japan.
| | - Tomoki Ito
- Department of Pathology, Hokkaido University, Sapporo, Japan
| | - Yu Ohmura
- Department of Neuropharmacology, Hokkaido University, Sapporo, Japan
| | - Kei Higashikawa
- Central Institute of Isotope Science, Hokkaido University, Sapporo, Japan
| | - Syota Miyajima
- Department of Pathology, Hokkaido University, Sapporo, Japan
| | - Ruka Tomatsu
- Department of Pathology, Hokkaido University, Sapporo, Japan
| | - Tsunehito Higashi
- Department of Cellular Pharmacology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akihiro Ishizu
- Department of Medical Laboratory Science, Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Yuji Kuge
- Central Institute of Isotope Science, Hokkaido University, Sapporo, Japan
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13
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Dysregulation of protein degradation in the hippocampus is associated with impaired spatial memory during the development of obesity. Behav Brain Res 2020; 393:112787. [PMID: 32603798 DOI: 10.1016/j.bbr.2020.112787] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/26/2020] [Accepted: 06/21/2020] [Indexed: 01/09/2023]
Abstract
Studies have shown that long-term exposure to high fat and other obesogenic diets results in insulin resistance and altered blood brain barrier permeability, dysregulation of intracellular signaling mechanisms, changes in DNA methylation levels and gene expression, and increased oxidative stress and neuroinflammation in the hippocampus, all of which are associated with impaired spatial memory. The ubiquitin-proteasome system controls the majority of protein degradation in cells and is a critical regulator of synaptic plasticity and memory formation. Yet, whether protein degradation in the hippocampus becomes dysregulated following weight gain and is associated with obesity-induced memory impairments is unknown. Here, we used a high fat diet procedure in combination with behavioral and subcellular fractionation protocols and a variety of biochemical assays to determine if ubiquitin-proteasome activity becomes altered in the hippocampus during obesity development and whether this is associated with impaired spatial memory. We found that only 6 weeks of exposure to a high fat diet was sufficient to impair performance on an object location task in rats and resulted in dynamic dysregulation of ubiquitin-proteasome activity in the nucleus and cytoplasm of cells in the hippocampus. Furthermore, these changes in the protein degradation process extended into cortical regions also involved in spatial memory formation. Collectively, these results indicate that weight gain-induced memory impairments may be due to altered ubiquitin-proteasome signaling that occurs during the early stages of obesity development.
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14
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Kanuka M, Ouchi F, Kato N, Katsuki R, Ito S, Miura K, Hikida M, Tamura T. Endoplasmic Reticulum Associated Degradation of Spinocerebellar Ataxia-Related CD10 Cysteine Mutant. Int J Mol Sci 2020; 21:ijms21124237. [PMID: 32545905 PMCID: PMC7352294 DOI: 10.3390/ijms21124237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 06/12/2020] [Accepted: 06/12/2020] [Indexed: 12/31/2022] Open
Abstract
Spinocerebellar ataxia (SCA) is one of the most severe neurodegenerative diseases and is often associated with misfolded protein aggregates derived from the genetic mutation of related genes. Recently, mutations in CD10 such as C143Y have been identified as SCA type 43. CD10, also known as neprilysin or neuroendopeptidase, digests functional neuropeptides, such as amyloid beta, in the extracellular region. In this study, we explored the cellular behavior of CD10 C143Y to gain an insight into the functional relationship of the mutation and SCA pathology. We found that wild-type CD10 is expressed on the plasma membrane and exhibits endopeptidase activity in a cultured cell line. CD10 C143Y, however, forms a disulfide bond-mediated oligomer that does not appear by the wild-type CD10. Furthermore, the CD10 C143Y mutant was retained in the endoplasmic reticulum (ER) by the molecular chaperone BiP and was degraded through the ER-associated degradation (ERAD) process, in which representative ERAD factors including EDEM1, SEL1L, and Hrd1 participate in the degradation. Suppression of CD10 C143Y ERAD recovers intracellular transport but not enzymatic activity. Our results indicate that the C143Y mutation in CD10 negatively affects protein maturation and results in ER retention and following ERAD. These findings provide beneficial insight into SCA type 43 pathology.
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Affiliation(s)
- Mai Kanuka
- Department of Life Science, Graduate school of Engineering and Resource, Akita University, Akita 010-8502, Japan; (M.K.); (N.K.); (R.K.); (S.I.); (K.M.); (M.H.)
| | - Fuka Ouchi
- Department of Life Science, Faculty of Engineering Science, Akita University, Akita 010-8502, Japan;
| | - Nagisa Kato
- Department of Life Science, Graduate school of Engineering and Resource, Akita University, Akita 010-8502, Japan; (M.K.); (N.K.); (R.K.); (S.I.); (K.M.); (M.H.)
| | - Riko Katsuki
- Department of Life Science, Graduate school of Engineering and Resource, Akita University, Akita 010-8502, Japan; (M.K.); (N.K.); (R.K.); (S.I.); (K.M.); (M.H.)
| | - Saori Ito
- Department of Life Science, Graduate school of Engineering and Resource, Akita University, Akita 010-8502, Japan; (M.K.); (N.K.); (R.K.); (S.I.); (K.M.); (M.H.)
| | - Kohta Miura
- Department of Life Science, Graduate school of Engineering and Resource, Akita University, Akita 010-8502, Japan; (M.K.); (N.K.); (R.K.); (S.I.); (K.M.); (M.H.)
| | - Masaki Hikida
- Department of Life Science, Graduate school of Engineering and Resource, Akita University, Akita 010-8502, Japan; (M.K.); (N.K.); (R.K.); (S.I.); (K.M.); (M.H.)
- Department of Life Science, Faculty of Engineering Science, Akita University, Akita 010-8502, Japan;
| | - Taku Tamura
- Department of Life Science, Graduate school of Engineering and Resource, Akita University, Akita 010-8502, Japan; (M.K.); (N.K.); (R.K.); (S.I.); (K.M.); (M.H.)
- Department of Life Science, Faculty of Engineering Science, Akita University, Akita 010-8502, Japan;
- Correspondence: ; Tel.: +81-18-889-2377
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15
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Osmulski PA, Karpowicz P, Jankowska E, Bohmann J, Pickering AM, Gaczyńska M. New Peptide-Based Pharmacophore Activates 20S Proteasome. Molecules 2020; 25:E1439. [PMID: 32235805 PMCID: PMC7145288 DOI: 10.3390/molecules25061439] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/13/2020] [Accepted: 03/18/2020] [Indexed: 02/01/2023] Open
Abstract
The proteasome is a pivotal element of controlled proteolysis, responsible for the catabolic arm of proteostasis. By inducing apoptosis, small molecule inhibitors of proteasome peptidolytic activities are successfully utilized in treatment of blood cancers. However, the clinical potential of proteasome activation remains relatively unexplored. In this work, we introduce short TAT peptides derived from HIV-1 Tat protein and modified with synthetic turn-stabilizing residues as proteasome agonists. Molecular docking and biochemical studies point to the α1/α2 pocket of the core proteasome α ring as the binding site of TAT peptides. We postulate that the TATs' pharmacophore consists of an N-terminal basic pocket-docking "activation anchor" connected via a β turn inducer to a C-terminal "specificity clamp" that binds on the proteasome α surface. By allosteric effects-including destabilization of the proteasomal gate-the compounds substantially augment activity of the core proteasome in vitro. Significantly, this activation is preserved in the lysates of cultured cells treated with the compounds. We propose that the proteasome-stimulating TAT pharmacophore provides an attractive lead for future clinical use.
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Affiliation(s)
- Paweł A. Osmulski
- Department of Molecular Medicine, UT Health San Antonio, Texas, TX 78245, USA;
- Barshop Institute for Longevity and Aging Studies, UT Health San Antonio, Texas, TX 78245, USA
| | - Przemysław Karpowicz
- Department of Organic Chemistry, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland;
- Department of Biomedical Chemistry, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland;
| | - Elżbieta Jankowska
- Department of Biomedical Chemistry, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland;
| | - Jonathan Bohmann
- Southwest Research Institute, San Antonio, Texas, TX 78238, USA;
| | - Andrew M. Pickering
- Department of Molecular Medicine, UT Health San Antonio, Texas, TX 78245, USA;
- Barshop Institute for Longevity and Aging Studies, UT Health San Antonio, Texas, TX 78245, USA
- The Glenn Biggs Institute for Alzheimer’s & Neurodegenerative Diseases, UT Health San Antonio, TX 78229, USA
| | - Maria Gaczyńska
- Department of Molecular Medicine, UT Health San Antonio, Texas, TX 78245, USA;
- Barshop Institute for Longevity and Aging Studies, UT Health San Antonio, Texas, TX 78245, USA
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16
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Bouska M, Huang K, Kang P, Bai H. Organelle aging: Lessons from model organisms. J Genet Genomics 2019; 46:171-185. [PMID: 31080045 PMCID: PMC6553499 DOI: 10.1016/j.jgg.2019.03.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/22/2019] [Accepted: 03/12/2019] [Indexed: 01/07/2023]
Abstract
Most cellular processes descend into failure during aging. While a large collection of longevity pathways has been identified in the past decades, the mechanism for age-related decline of cellular homeostasis and organelle function remains largely unsolved. It is known that many organelles undergo structural and functional changes during normal aging, which significantly contributes to the decline of tissue function at old ages. Since recent studies have revealed an emerging role of organelles as regulatory hubs in maintaining cellular homeostasis, understanding of organelle aging will provide important insights into the cellular basis of organismal aging. Here we review current progress on the characterization of age-dependent structural and functional alterations in the more well-studied organelles, as well as the known mechanisms governing organelle aging in model organisms, with a special focus on the fruit fly Drosophila melanogaster.
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Affiliation(s)
- Mark Bouska
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Kerui Huang
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Ping Kang
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA
| | - Hua Bai
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, IA, 50011, USA.
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17
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Trachana V, Mourmoura E, Papathanasiou I, Tsezou A. Understanding the role of chondrocytes in osteoarthritis: utilizing proteomics. Expert Rev Proteomics 2019; 16:201-213. [DOI: 10.1080/14789450.2019.1571918] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Varvara Trachana
- Laboratory of Biology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Evanthia Mourmoura
- Laboratory of Cytogenetics and Molecular Genetics, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Ioanna Papathanasiou
- Laboratory of Cytogenetics and Molecular Genetics, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Aspasia Tsezou
- Laboratory of Biology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
- Laboratory of Cytogenetics and Molecular Genetics, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
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18
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Khan TK, Nelson TJ. Protein kinase C activator bryostatin‐1 modulates proteasome function. J Cell Biochem 2018; 119:6894-6904. [PMID: 29693282 DOI: 10.1002/jcb.26887] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 03/21/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Tapan K. Khan
- Center for Neurodegenerative DiseasesBlanchette Rockefeller Neurosciences Institute, West Virginia UniversityMorgantownWest Virginia
| | - Thomas J. Nelson
- Center for Neurodegenerative DiseasesBlanchette Rockefeller Neurosciences Institute, West Virginia UniversityMorgantownWest Virginia
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19
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Mitsuoka K, Kikutani T, Miwa Y, Sato I. Expression of CGRP neurotransmitter and vascular genesis marker mRNA is age-dependent in superior cervical ganglia of senescence-accelerated prone mice. Neurosci Lett 2018; 664:144-151. [PMID: 29154859 DOI: 10.1016/j.neulet.2017.11.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/30/2017] [Accepted: 11/13/2017] [Indexed: 11/30/2022]
Abstract
Calcitonin gene-related peptide (CGRP) is a neurotransmitter that is released from the superior cervical ganglion (SCG) and causes head and neck pain. The morphological properties of human SCG neurons, including neurotransmitter content, are altered during aging. However, morphological changes in CGRP in the SCG during aging are not known. Therefore, we investigated CGRP and other markers in the SCG during aging in an aging model of senescence-accelerated prone mouse (SAMP8) and senescence-accelerated resistant mice (SAMR1) using real-time RT-PCR mRNA analyses and in situ hybridization. The abundance of neurotransmitter (CGRP, NPY, TRPV1), vascular genesis marker (CD31, LYVE-1), and cytochrome C mRNA differed between 12-week-old and 24-week-old SAMP8 and SAMR1. Abundance of TRPV1, CD31 and cytochrome C mRNAs of SAMP8 decreased between 12- and 24-week-old. The ratio of CGRP mRNA positive cells and CGRP mRNA abundance levels of the SCG of aging mouse such as SAMP8 have already been also higher than that of SAMR1 at 12-week-old. The CGRP positive shrunken ganglion cells was increased from 12- to 24-weeks-old mouse in SAMR1 and SAMP8. The SCG primarily affected the internal and external carotid arteries, larynx thyroid gland, and pharyngeal muscle during aging.
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Affiliation(s)
- Kazuyuki Mitsuoka
- Department of Anatomy, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan; Division of Oral Rehabilitation, Nippon Dental University Graduate School of Life Dentistry, Tokyo, Japan
| | - Takeshi Kikutani
- Division of Oral Rehabilitation, Nippon Dental University Graduate School of Life Dentistry, Tokyo, Japan; Nippon Dental University Tama Oral Rehabilitation Clinic, Japan
| | - Yoko Miwa
- Department of Anatomy, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan
| | - Iwao Sato
- Department of Anatomy, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan.
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20
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Abstract
The ubiquitin-proteasome system (UPS) plays a key role in maintaining proteostasis by degrading most of the cellular proteins. Traditionally, UPS activity is studied in vitro, in yeast, or in mammalian cell cultures by using short-lived GFP-based UPS reporters. Here, we present protocols for two fluorescent tools facilitating real-time imaging of UPS activity in living animals. We have generated transgenic Caenorhabditis elegans (C. elegans) expressing a photoconvertible UbG76V-Dendra2 UPS reporter, which permits measurement of reporter degradation by the proteasome independently of reporter protein synthesis, and a fluorescent polyubiquitin-binding reporter for detection of the endogenous pool of Lys48-linked polyubiquitinated proteasomal substrates. These reporter systems facilitate cell- and tissue-specific analysis of UPS activity especially in young adult animals, but can also be used for studies during development, aging, and for example stress conditions.
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21
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Kim Y, Kwon OK, Chae S, Jung HJ, Ahn S, Jeon JM, Sung E, Kim S, Ki SH, Chung KW, Chung HY, Jung YS, Hwang DH, Lee S. Quantitative Proteomic Analysis of Changes Related to Age and Calorie Restriction in Rat Liver Tissue. Proteomics 2017; 18:e1700240. [PMID: 29280565 DOI: 10.1002/pmic.201700240] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 11/30/2017] [Indexed: 01/07/2023]
Abstract
Calorie restriction (CR) is the most frequently studied mechanism for increasing longevity, protecting against stress, and delaying age-associated diseases. Most studies have initiated CR in young animals to determine the protective effects against aging. Although aging phenomena are well-documented, the molecular mechanisms of aging and CR remain unclear. In this study, we observe changes in hepatic proteins upon age-related and diet-restricted changes in the rat liver using quantitative proteomics. Quantitative proteomes are measured using tandem mass tag labeling followed by LC-MS/MS. We compare protein levels in livers from young (6 months old) and old (25 months old) rats with 40% calorie-restricted (YCR and OCR, respectively) or ad libitum diets. In total, 44 279 peptides and 3134 proteins are identified and 260 differentially expressed proteins are found. Functional enrichment analysis show that these proteins are mainly involved in glucose and fatty acid metabolism-related processes, consistent with the theory that energy metabolism regulation is dependent on age-related and calorie-restricted changes in liver tissue. In addition, proteins mediating inflammation and gluconeogenesis are increased in OCR livers, but not YCR livers. These results show that CR in old rats might not have antiaging benefits because liver inflammation is increased.
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Affiliation(s)
- YounAh Kim
- BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea.,Center for Plant Aging Research, Institute for Basic Science, Daegu, Republic of Korea
| | - Oh Kwang Kwon
- BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Sehyun Chae
- Department of New Biology, DGIST, Daegu, Republic of Korea
| | - Hee-Jung Jung
- Center for Plant Aging Research, Institute for Basic Science, Daegu, Republic of Korea
| | - Sanghyun Ahn
- Center for Plant Aging Research, Institute for Basic Science, Daegu, Republic of Korea
| | - Ju Mi Jeon
- BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Eunji Sung
- BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - SunJoo Kim
- BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Sung Hwan Ki
- College of Pharmacy, Chosun University, Gwangju, Republic of Korea
| | - Ki Wung Chung
- Molecular Inflammation Research Center for Aging Intervention, College of Pharmacy, Pusan National University, Busan, Republic of Korea
| | - Hae Young Chung
- Molecular Inflammation Research Center for Aging Intervention, College of Pharmacy, Pusan National University, Busan, Republic of Korea
| | - Young Suk Jung
- Molecular Inflammation Research Center for Aging Intervention, College of Pharmacy, Pusan National University, Busan, Republic of Korea
| | - Dae Hee Hwang
- Center for Plant Aging Research, Institute for Basic Science, Daegu, Republic of Korea.,Department of New Biology, DGIST, Daegu, Republic of Korea
| | - Sangkyu Lee
- BK21 Plus KNU Multi-Omics Based Creative Drug Research Team, College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Republic of Korea
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22
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Doherty A, Kernogitski Y, Kulminski AM, Pedro de Magalhães J. Identification of polymorphisms in cancer patients that differentially affect survival with age. Aging (Albany NY) 2017; 9:2117-2136. [PMID: 29064820 PMCID: PMC5680559 DOI: 10.18632/aging.101305] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 10/06/2017] [Indexed: 01/08/2023]
Abstract
The World Health Organization predicts that the proportion of the world's population over 60 will almost double from 12% to 22% between 2015 and 2050. Ageing is the biggest risk factor for cancer, which is a leading cause of deaths worldwide. Unfortunately, research describing how genetic variants affect cancer progression commonly neglects to account for the ageing process. Herein is the first systematic analysis that combines a large longitudinal data set with a targeted candidate gene approach to examine the effect of genetic variation on survival as a function of age in cancer patients. Survival was significantly decreased in individuals with heterozygote or rare homozygote (i.e. variant) genotypes compared to those with a common homozygote genotype (i.e. wild type) for two single nucleotide polymorphisms (rs11574358 and rs4147918), one gene (SIRT3) and one pathway (FoxO signalling) in an age-dependent manner. All identified genes and pathways have previously been associated with ageing and cancer. These observations demonstrate that there are ageing-related genetic elements that differentially affect mortality in cancer patients in an age-dependent manner. Understanding the genetic determinants affecting prognosis differently with age will be invaluable to develop age-specific prognostic biomarkers and personalized therapies that may improve clinical outcomes for older individuals.
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Affiliation(s)
- Aoife Doherty
- Integrative Genomics of Ageing Group, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, United Kingdom
| | - Yelena Kernogitski
- Biodemography of Aging Research Unit (BARU), Social Science Research Institute, Duke University, Durham, NC 27708, USA
| | - Alexander M Kulminski
- Biodemography of Aging Research Unit (BARU), Social Science Research Institute, Duke University, Durham, NC 27708, USA
| | - João Pedro de Magalhães
- Integrative Genomics of Ageing Group, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, L7 8TX, United Kingdom
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23
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Lahmass I, Lamkami T, Delporte C, Sikdar S, Van Antwerpen P, Saalaoui E, Megalizzi V. The waste of saffron crop, a cheap source of bioactive compounds. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.05.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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24
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Wang YT, Tseng PH, Chen CL, Han DS, Chi YC, Tseng FY, Yang WS. Human serum RNase-L level is inversely associated with metabolic syndrome and age. Cardiovasc Diabetol 2017; 16:46. [PMID: 28399925 PMCID: PMC5387300 DOI: 10.1186/s12933-017-0522-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 03/17/2017] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Ribonuclease-L (RNase-L) was known to be a ubiquitous enzyme involved in several cellular functions, especially innate immunity. It was recently shown to participate in adipogenesis in rodents. Here, we developed a method to measure serum levels of RNase-L and analyzed the relationship between RNase-L and metabolic syndrome (MetS). METHODS A total of 396 subjects were recruited from a health check-up program. An in-house RNase-L immunoassay was developed. The serum RNase-L levels of these subjects were measured, and the association of MetS-related factors with RNase-L levels was assessed. RESULTS The mean serum level of RNase-L of the subjects with MetS were lower than those without (16.5 ± 6.4 vs. 18.4 ± 8.0 μg/ml, P = 0.018). The subjects with central obesity, elevated blood pressure, or impaired fasting glucose also had lower serum RNase-L levels in comparison to those without. In multivariate linear regression analysis, diastolic blood pressure (β = -0.129, P = 0.024) and high-density lipoprotein cholesterol (HDL-C) (β = 0.127, P = 0.036) were related to serum RNase-L. For every 5 μg/ml increase in serum RNase-L levels, it is associated with a reduced risk of MetS (OR 0.83, 95% CI 0.71-0.98, P = 0.028), central obesity (OR 0.82, 95% CI 0.71-0.94, P = 0.005), or low HDL-C (OR 0.86, 95% CI 0.74-1.00, P = 0.042). Moreover, age is inversely related to serum RNase-L levels in various analyses. CONCLUSIONS The serum RNase-L levels were inversely associated with MetS, unfavorable metabolic profiles, and age.
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Affiliation(s)
- Yi-Ting Wang
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, No. 7, Chung-San South Road, Taipei, 10002, Taiwan
| | - Ping-Huei Tseng
- Division of Gastroenterology, Department of Internal Medicine, National Taiwan University Hospital, No. 7, Chung-San South Road, Taipei, 10002, Taiwan
| | - Chi-Ling Chen
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, No. 7, Chung-San South Road, Taipei, 10002, Taiwan.,Graduate Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, No. 17, Xu-Zhou Road, Taipei, 10055, Taiwan
| | - Der-Sheng Han
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital Beihu Branch, No.87, Neijiang St., Taipei, 10800, Taiwan.,Community and Geriatric Medicine Research Center, National Taiwan University Hospital Beihu Branch, No.87, Neijiang St., Taipei, 10800, Taiwan
| | - Yu-Chiao Chi
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, No. 7, Chung-San South Road, Taipei, 10002, Taiwan.,Division of Endocrinology & Metabolism, Department of Internal Medicine, National Taiwan University Hospital, No. 7, Chung-San South Road, Taipei, 10002, Taiwan
| | - Fen-Yu Tseng
- Division of Endocrinology & Metabolism, Department of Internal Medicine, National Taiwan University Hospital, No. 7, Chung-San South Road, Taipei, 10002, Taiwan
| | - Wei-Shiung Yang
- Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, No. 7, Chung-San South Road, Taipei, 10002, Taiwan. .,Division of Endocrinology & Metabolism, Department of Internal Medicine, National Taiwan University Hospital, No. 7, Chung-San South Road, Taipei, 10002, Taiwan. .,Center for Obesity, Lifestyle and Metabolic Surgery, National Taiwan University Hospital, No. 7, Chung-San South Road, Taipei, 10002, Taiwan. .,Graduate Institute of Medical Genomics & Proteomics, College of Medicine, National Taiwan University, No.1, Sec. 1, Jen-Ai Road, Taipei, 10051, Taiwan. .,, No. 1, Chang-Teh St., Taipei, 10048, Taiwan.
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25
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Ott C, König J, Höhn A, Jung T, Grune T. Macroautophagy is impaired in old murine brain tissue as well as in senescent human fibroblasts. Redox Biol 2016; 10:266-273. [PMID: 27825071 PMCID: PMC5099282 DOI: 10.1016/j.redox.2016.10.015] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 10/07/2016] [Accepted: 10/12/2016] [Indexed: 12/22/2022] Open
Abstract
The overall decrease in proteolytic activity in aging can promote and accelerate protein accumulation and metabolic disturbances. To specifically analyze changes in macroautophagy (MA) we quantified different autophagy-related proteins (ATGs) in young, adult and old murine tissue as well as in young and senescent human fibroblasts. Thus, we revealed significantly reduced levels of ATG5-ATG12, LC3-II/LC3-I ratio, Beclin-1 and p62 in old brain tissue and senescent human fibroblasts. To investigate the role of mTOR, the protein itself and its target proteins p70S6 kinase and 4E-BP1 were quantified. Significant increased mTOR protein levels were determined in old tissue and cells. Determination of phosphorylated and basal amount of both proteins suggested higher mTOR activity in old murine tissue and senescent human fibroblasts. Besides the reduced levels of ATGs, mTOR can additionally reduce MA, promoting further acceleration of protein accumulation and metabolic disturbances during aging.
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Affiliation(s)
- Christiane Ott
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany.
| | - Jeannette König
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany.
| | - Annika Höhn
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany.
| | - Tobias Jung
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany.
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany.
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26
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Carmona-Gutierrez D, Hughes AL, Madeo F, Ruckenstuhl C. The crucial impact of lysosomes in aging and longevity. Ageing Res Rev 2016; 32:2-12. [PMID: 27125853 DOI: 10.1016/j.arr.2016.04.009] [Citation(s) in RCA: 144] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 03/26/2016] [Accepted: 04/23/2016] [Indexed: 02/07/2023]
Abstract
Lysosomes are the main catabolic organelles of a cell and play a pivotal role in a plethora of cellular processes, including responses to nutrient availability and composition, stress resistance, programmed cell death, plasma membrane repair, development, and cell differentiation. In line with this pleiotropic importance for cellular and organismal life and death, lysosomal dysfunction is associated with many age-related pathologies like Parkinson's and Alzheimer's disease, as well as with a decline in lifespan. Conversely, targeting lysosomal functional capacity is emerging as a means to promote longevity. Here, we analyze the current knowledge on the prominent influence of lysosomes on aging-related processes, such as their executory and regulatory roles during general and selective macroautophagy, or their storage capacity for amino acids and ions. In addition, we review and discuss the roles of lysosomes as active players in the mechanisms underlying known lifespan-extending interventions like, for example, spermidine or rapamycin administration. In conclusion, this review aims at critically examining the nature and pliability of the different layers, in which lysosomes are involved as a control hub for aging and longevity.
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27
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Ott C, König J, Höhn A, Jung T, Grune T. Reduced autophagy leads to an impaired ferritin turnover in senescent fibroblasts. Free Radic Biol Med 2016; 101:325-333. [PMID: 27789294 DOI: 10.1016/j.freeradbiomed.2016.10.492] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 10/12/2016] [Accepted: 10/20/2016] [Indexed: 01/18/2023]
Abstract
Changes in the two main intracellular degradation systems, the Ubiquitin-Proteasome System and the Autophagy-Lysosome pathway (ALP) are widely discussed as a hallmark of the aging process. To follow the age-related behavior of both degradation systems we examined their impact on ferritin, known to be degradable by both. Ferritin H was analyzed in young and senescent human fibroblasts, revealing a higher steady-state level in the senescent cells. By blocking both proteolytic systems, we confirmed that particularly the ALP plays a crucial role in ferritin H turnover. However, an unexpected increase in lysosomal activity in the senescent cells, suggests a dysregulation in the autophagy pathway. To further investigate the impaired ferritin H turnover, confocal microscopic colocalization studies of ferritin H with lysosomal-associated membrane protein 2a (Lamp2a) and monodansylcadaverine (MDC) were performed and clearly revealed the degradation of ferritin by macroautophagy. By induction of autophagy via inhibition of mTOR using rapamycin an increase of ferritin H turnover was obtained in senescent cells, demonstrating a mTOR dependent reduction of autophagy in senescent human fibroblasts.
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Affiliation(s)
- Christiane Ott
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany.
| | - Jeannette König
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany.
| | - Annika Höhn
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany.
| | - Tobias Jung
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany.
| | - Tilman Grune
- Department of Molecular Toxicology, German Institute of Human Nutrition, Potsdam-Rehbruecke, Germany; German Center for Diabetes Research (DZD), 85764 München-Neuherberg, Germany; German Center for Cardiovascular Research (DZHK), 10117 Berlin, Germany.
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28
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Roberts JH, Liu F, Karnuta JM, Fitzgerald MC. Discovery of Age-Related Protein Folding Stability Differences in the Mouse Brain Proteome. J Proteome Res 2016; 15:4731-4741. [PMID: 27806573 DOI: 10.1021/acs.jproteome.6b00927] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Described here is the application of thermodynamic stability measurements to study age-related differences in the folding and stability of proteins in a rodent model of aging. Thermodynamic stability profiles were generated for 809 proteins in brain cell lysates from mice, aged 6 (n = 7) and 18 months (n = 9) using the Stability of Proteins from Rates of Oxidation (SPROX) technique. The biological variability of the protein stability measurements was low and within the experimental error of SPROX. A total of 83 protein hits were detected with age-related stability differences in the brain samples. Remarkably, the large majority of the brain protein hits were destabilized in the old mice, and the hits were enriched in proteins that have slow turnover rates (p < 0.07). Furthermore, 70% of the hits have been previously linked to aging or age-related diseases. These results help validate the use of thermodynamic stability measurements to capture relevant age-related proteomic changes and establish a new biophysical link between these proteins and aging.
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Affiliation(s)
- Julia H Roberts
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Fang Liu
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Jaret M Karnuta
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
| | - Michael C Fitzgerald
- Department of Chemistry, Duke University , Durham, North Carolina 27708, United States
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29
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Senescence-Associated Changes in Proteome and O-GlcNAcylation Pattern in Human Peritoneal Mesothelial Cells. BIOMED RESEARCH INTERNATIONAL 2015; 2015:382652. [PMID: 26640786 PMCID: PMC4657062 DOI: 10.1155/2015/382652] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 10/24/2015] [Accepted: 10/25/2015] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Senescence of peritoneal mesothelial cells represents a biological program defined by arrested cell growth and altered cell secretory phenotype with potential impact in peritoneal dialysis. This study aims to characterize cellular senescence at the level of global protein expression profiles and modification of proteins with O-linked N-acetylglucosamine (O-GlcNAcylation). METHODS A comparative proteomics analysis between young and senescent human peritoneal mesothelial cells (HPMC) was performed using two-dimensional gel electrophoresis. O-GlcNAc status was assessed by Western blot under normal conditions and after modulation with 6-diazo-5-oxo-L-norleucine (DON) to decrease O-GlcNAcylation or O-(2-acetamido-2-deoxy-D-glucopyranosylidene) amino N-phenyl carbamate (PUGNAc) to increase O-GlcNAcylation. RESULTS Comparison of protein pattern of senescent and young HPMC revealed 29 differentially abundant protein spots, 11 of which were identified to be actin (cytoplasmic 1 and 2), cytokeratin-7, cofilin-2, transgelin-2, Hsp60, Hsc70, proteasome β-subunits (type-2 and type-3), nucleoside diphosphate kinase A, and cytosolic 5'(3')-deoxyribonucleotidase. Although the global level of O-GlcNAcylation was comparable, senescent cells were not sensitive to modulation by PUGNAc. DISCUSSION This study identified changes of the proteome and altered dynamics of O-GlcNAc regulation in senescent mesothelial cells. Whereas changes in cytoskeleton-associated proteins likely reflect altered cell morphology, changes in chaperoning and housekeeping proteins may have functional impact on cellular stress response in peritoneal dialysis.
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30
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Chondrogianni N, Voutetakis K, Kapetanou M, Delitsikou V, Papaevgeniou N, Sakellari M, Lefaki M, Filippopoulou K, Gonos ES. Proteasome activation: An innovative promising approach for delaying aging and retarding age-related diseases. Ageing Res Rev 2015; 23:37-55. [PMID: 25540941 DOI: 10.1016/j.arr.2014.12.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 12/09/2014] [Accepted: 12/15/2014] [Indexed: 11/16/2022]
Abstract
Aging is a natural process accompanied by a progressive accumulation of damage in all constituent macromolecules (nucleic acids, lipids and proteins). Accumulation of damage in proteins leads to failure of proteostasis (or vice versa) due to increased levels of unfolded, misfolded or aggregated proteins and, in turn, to aging and/or age-related diseases. The major cellular proteolytic machineries, namely the proteasome and the lysosome, have been shown to dysfunction during aging and age-related diseases. Regarding the proteasome, it is well established that it can be activated either through genetic manipulation or through treatment with natural or chemical compounds that eventually result to extension of lifespan or deceleration of the progression of age-related diseases. This review article focuses on proteasome activation studies in several species and cellular models and their effects on aging and longevity. Moreover, it summarizes findings regarding proteasome activation in the major age-related diseases as well as in progeroid syndromes.
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Affiliation(s)
- Niki Chondrogianni
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece.
| | - Konstantinos Voutetakis
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Marianna Kapetanou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Vasiliki Delitsikou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Nikoletta Papaevgeniou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Marianthi Sakellari
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece; Örebro University, Medical School, Örebro, Sweden
| | - Maria Lefaki
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Konstantina Filippopoulou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Efstathios S Gonos
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry and Biotechnology, 48 Vas. Constantinou Ave., 116 35 Athens, Greece; Örebro University, Medical School, Örebro, Sweden.
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31
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Karunadharma PP, Basisty N, Dai DF, Chiao YA, Quarles EK, Hsieh EJ, Crispin D, Bielas JH, Ericson NG, Beyer RP, MacKay VL, MacCoss MJ, Rabinovitch PS. Subacute calorie restriction and rapamycin discordantly alter mouse liver proteome homeostasis and reverse aging effects. Aging Cell 2015; 14:547-57. [PMID: 25807975 PMCID: PMC4531069 DOI: 10.1111/acel.12317] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/05/2014] [Indexed: 12/21/2022] Open
Abstract
Calorie restriction (CR) and rapamycin (RP) extend lifespan and improve health across model organisms. Both treatments inhibit mammalian target of rapamycin (mTOR) signaling, a conserved longevity pathway and a key regulator of protein homeostasis, yet their effects on proteome homeostasis are relatively unknown. To comprehensively study the effects of aging, CR, and RP on protein homeostasis, we performed the first simultaneous measurement of mRNA translation, protein turnover, and abundance in livers of young (3 month) and old (25 month) mice subjected to 10-week RP or 40% CR. Protein abundance and turnover were measured in vivo using (2) H3 -leucine heavy isotope labeling followed by LC-MS/MS, and translation was assessed by polysome profiling. We observed 35-60% increased protein half-lives after CR and 15% increased half-lives after RP compared to age-matched controls. Surprisingly, the effects of RP and CR on protein turnover and abundance differed greatly between canonical pathways, with opposite effects in mitochondrial (mt) dysfunction and eIF2 signaling pathways. CR most closely recapitulated the young phenotype in the top pathways. Polysome profiles indicated that CR reduced polysome loading while RP increased polysome loading in young and old mice, suggesting distinct mechanisms of reduced protein synthesis. CR and RP both attenuated protein oxidative damage. Our findings collectively suggest that CR and RP extend lifespan in part through the reduction of protein synthetic burden and damage and a concomitant increase in protein quality. However, these results challenge the notion that RP is a faithful CR mimetic and highlight mechanistic differences between the two interventions.
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Affiliation(s)
| | - Nathan Basisty
- Department of Pathology, University of WashingtonSeattle, WA, 98195, USA
| | - Dao-Fu Dai
- Department of Pathology, University of WashingtonSeattle, WA, 98195, USA
| | - Ying A Chiao
- Department of Pathology, University of WashingtonSeattle, WA, 98195, USA
| | - Ellen K Quarles
- Department of Pathology, University of WashingtonSeattle, WA, 98195, USA
| | - Edward J Hsieh
- Department of Genome Sciences, University of WashingtonSeattle, WA, 98195, USA
| | - David Crispin
- Department of Pathology, University of WashingtonSeattle, WA, 98195, USA
| | - Jason H Bielas
- Department of Pathology, University of WashingtonSeattle, WA, 98195, USA
- Human Biology Division, Fred Hutchinson Cancer Research CenterSeattle, WA, 98109, USA
- Public Health Sciences Division, Fred Hutchinson Cancer Research CenterSeattle, WA, 98109, USA
| | - Nolan G Ericson
- Public Health Sciences Division, Fred Hutchinson Cancer Research CenterSeattle, WA, 98109, USA
| | - Richard P Beyer
- Department of Environmental Health and Biostatistics, University of WashingtonSeattle, WA, 98195, USA
| | - Vivian L MacKay
- Department of Biochemistry, University of WashingtonSeattle, WA, 98195, USA
| | - Michael J MacCoss
- Department of Genome Sciences, University of WashingtonSeattle, WA, 98195, USA
| | - Peter S Rabinovitch
- Department of Pathology, University of WashingtonSeattle, WA, 98195, USA
- Correspondence, Peter S. Rabinovitch, Department of Pathology, University of Washington, 1959 NE Pacific St., HSB-K081, Seattle, WA 98195, USA. Tel.: 206-685-3761; fax: 206-616-8271; e-mail:
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32
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Yamada Y, Tomaru U, Ishizu A, Ito T, Kiuchi T, Ono A, Miyajima S, Nagai K, Higashi T, Matsuno Y, Dosaka-Akita H, Nishimura M, Miwa S, Kasahara M. Decreased proteasomal function accelerates cigarette smoke-induced pulmonary emphysema in mice. J Transl Med 2015; 95:625-34. [PMID: 25915723 DOI: 10.1038/labinvest.2015.43] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 12/28/2014] [Accepted: 01/23/2015] [Indexed: 12/20/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a disease common in elderly people, characterized by progressive destruction of lung parenchyma and chronic inflammation of the airways. The pathogenesis of COPD remains unclear, but recent studies suggest that oxidative stress-induced apoptosis in alveolar cells contributes to emphysematous lung destruction. The proteasome is a multicatalytic enzyme complex that plays a critical role in proteostasis by rapidly destroying misfolded and modified proteins generated by oxidative and other stresses. Proteasome activity decreases with aging in many organs including lungs, and an age-related decline in proteasomal function has been implicated in various age-related pathologies. However, the role of the proteasome system in the pathogenesis of COPD has not been investigated. Recently, we have established a transgenic (Tg) mouse model with decreased proteasomal chymotrypsin-like activity, showing age-related phenotypes. Using this model, we demonstrate here that decreased proteasomal function accelerates cigarette smoke (CS)-induced pulmonary emphysema. CS-exposed Tg mice showed remarkable airspace enlargement and increased foci of inflammation compared with wild-type controls. Importantly, apoptotic cells were found in the alveolar walls of the affected lungs. Impaired proteasomal activity also enhanced apoptosis in cigarette smoke extract (CSE)-exposed fibroblastic cells derived from mice and humans in vitro. Notably, aggresome formation and prominent nuclear translocation of apoptosis-inducing factor were observed in CSE-exposed fibroblastic cells isolated from Tg mice. Collective evidence suggests that CS exposure and impaired proteasomal activity coordinately enhance apoptotic cell death in the alveolar walls that may be involved in the development and progression of emphysema in susceptible individuals such as the elderly.
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Affiliation(s)
- Yosuke Yamada
- 1] Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan [2] Department of Surgical Pathology, Hokkaido University Hospital, Sapporo, Japan
| | - Utano Tomaru
- Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Akihiro Ishizu
- Faculty of Health Sciences, Hokkaido University, Sapporo, Japan
| | - Tomoki Ito
- Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Takayuki Kiuchi
- Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Ayako Ono
- Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Syota Miyajima
- Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Katsura Nagai
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo, Japan
| | - Tsunehito Higashi
- Department of Cellular Pharmacology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Yoshihiro Matsuno
- Department of Surgical Pathology, Hokkaido University Hospital, Sapporo, Japan
| | - Hirotoshi Dosaka-Akita
- Department of Medical Oncology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Masaharu Nishimura
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo, Japan
| | - Soichi Miwa
- Department of Cellular Pharmacology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Masanori Kasahara
- Department of Pathology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
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Jang J, Wang Y, Kim HS, Lalli MA, Kosik KS. Nrf2, a regulator of the proteasome, controls self-renewal and pluripotency in human embryonic stem cells. Stem Cells 2015; 32:2616-25. [PMID: 24895273 DOI: 10.1002/stem.1764] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 03/18/2014] [Accepted: 04/25/2014] [Indexed: 12/30/2022]
Abstract
Nuclear factor, erythroid 2-like 2 (Nrf2) is a master transcription factor for cellular defense against endogenous and exogenous stresses by regulating expression of many antioxidant and detoxification genes. Here, we show that Nrf2 acts as a key pluripotency gene and a regulator of proteasome activity in human embryonic stem cells (hESCs). Nrf2 expression is highly enriched in hESCs and dramatically decreases upon differentiation. Nrf2 inhibition impairs both the self-renewal ability of hESCs and re-establishment of pluripotency during cellular reprogramming. Nrf2 activation can delay differentiation. During early hESC differentiation, Nrf2 closely colocalizes with OCT4 and NANOG. As an underlying mechanism, our data show that Nrf2 regulates proteasome activity in hESCs partially through proteasome maturation protein (POMP), a proteasome chaperone, which in turn controls the proliferation of self-renewing hESCs, three germ layer differentiation and cellular reprogramming. Even modest proteasome inhibition skews the balance of early differentiation toward mesendoderm at the expense of an ectodermal fate by decreasing the protein level of cyclin D1 and delaying the degradation of OCT4 and NANOG proteins. Taken together, our findings suggest a new potential link between environmental stress and stemness with Nrf2 and the proteasome coordinately positioned as key mediators.
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Affiliation(s)
- Jiwon Jang
- Neuroscience Research Institute, Department of Molecular Cellular Developmental Biology, University of California, Santa Barbara, California, USA
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Choi SI, Maeng YS, Kim TI, Lee Y, Kim YS, Kim EK. Lysosomal trafficking of TGFBIp via caveolae-mediated endocytosis. PLoS One 2015; 10:e0119561. [PMID: 25853243 PMCID: PMC4390356 DOI: 10.1371/journal.pone.0119561] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Accepted: 01/10/2015] [Indexed: 11/18/2022] Open
Abstract
Transforming growth factor-beta-induced protein (TGFBIp) is ubiquitously expressed in the extracellular matrix (ECM) of various tissues and cell lines. Progressive accumulation of mutant TGFBIp is directly involved in the pathogenesis of TGFBI-linked corneal dystrophy. Recent studies reported that mutant TGFBIp accumulates in cells; however, the trafficking of TGFBIp is poorly understood. Therefore, we investigated TGFBIp trafficking to determine the route of its internalization and secretion and to elucidate its roles in the pathogenesis of granular corneal dystrophy type 2 (GCD2). Our data indicate that newly synthesized TGFBIp was secreted via the endoplasmic reticulum/Golgi-dependent secretory pathway, and this secretion was delayed in the corneal fibroblasts of patients with GCD2. We also found that TGFBIp was internalized by caveolae-mediated endocytosis, and the internalized TGFBIp accumulated after treatment with bafilomycin A1, an inhibitor of lysosomal degradation. In addition, the proteasome inhibitor MG132 inhibits the endocytosis of TGFBIp. Co-immunoprecipitation revealed that TGFBIp interacted with integrin αVβ3. Moreover, treatment with arginine-glycine-aspartic acid (RGD) tripeptide suppressed the internalization of TGFBIp. These insights on TGFBIp trafficking could lead to the identification of novel targets and the development of new therapies for TGFBI-linked corneal dystrophy.
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Affiliation(s)
- Seung-il Choi
- Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Yong-Sun Maeng
- Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Tae-im Kim
- Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
- Institute of Vision Research, Severance Biomedical Science Institute, Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Yangsin Lee
- Department of Integrated Omics for Biomedical Science, Graduate School, Yonsei University, Seoul, South Korea
| | - Yong-Sun Kim
- Ilsong Institute of Life Science, Hallym University, Anyang, South Korea
- Department of Microbiology, College of Medicine, Hallym University, Chuncheon, South Korea
| | - Eung Kweon Kim
- Department of Ophthalmology, Corneal Dystrophy Research Institute, Yonsei University College of Medicine, Seoul, South Korea
- Institute of Vision Research, Severance Biomedical Science Institute, Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
- * E-mail:
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Wiemer M, Osiewacz HD. The proteasome activity reporter GFP-Cl1 is degraded by autophagy in the aging model Podospora anserina. F1000Res 2014; 3:230. [PMID: 25520781 PMCID: PMC4264638 DOI: 10.12688/f1000research.5337.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/25/2014] [Indexed: 01/08/2023] Open
Abstract
The degradation of damaged proteins is an important vital function especially during aging and stress. The ubiquitin proteasome system is one of the major cellular machineries for protein degradation. Health and longevity are associated with high proteasome activity. To demonstrate such a role in aging of Podospora anserina, we first analyzed the transcript and protein abundance of selected proteasome components in wild-type cultures of different age. No significant differences were observed. Next, in order to increase the overall proteasome abundance we generated strains overexpressing the catalytic proteasome subunits PaPRE2 and PaPRE3. Although transcript levels were strongly increased, no substantial effect on the abundance of the corresponding proteins was observed. Finally, the analysis of the P. anserina strains expressing the sequence coding for the CL1 degron fused to the Gfp gene revealed no evidence for degradation of the GFP-CL1 fusion protein by the proteasome. Instead, our results demonstrate the degradation of the CL1-degron sequence via autophagy, indicating that basal autophagy appears to be a very effective protein quality control pathway in P. anserina.
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Affiliation(s)
- Matthias Wiemer
- Institute of Molecular Biosciences and Cluster of Excellence Frankfurt Macromolecular Complexes; Department of Biosciences, J W Goethe University, Frankfurt, 60438, Germany
| | - Heinz D Osiewacz
- Institute of Molecular Biosciences and Cluster of Excellence Frankfurt Macromolecular Complexes; Department of Biosciences, J W Goethe University, Frankfurt, 60438, Germany
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Claud EC, McDonald JAK, He SM, Yu Y, Duong L, Sun J, Petrof EO. Differential expression of 26S proteasome subunits and functional activity during neonatal development. Biomolecules 2014; 4:812-26. [PMID: 25177858 PMCID: PMC4192673 DOI: 10.3390/biom4030812] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 05/02/2014] [Accepted: 08/19/2014] [Indexed: 01/21/2023] Open
Abstract
Proteasomes regulate many essential cellular processes by degrading intracellular proteins. While aging is known to be associated with dysfunction of the proteasome, there are few reports detailing activity and function of proteasomes in the early stages of life. To elucidate the function and development of mammalian proteasomes, 26S proteasomes were affinity-purified from rat intestine, spleen and liver. The developmental expression of core, regulatory and immunoproteasome subunits was analyzed by immunoblotting and reverse-transcriptase PCR of mRNA subunits, and proteasome catalytic function was determined by fluorogenic enzymatic assays. The expression of core (β2, β5, α7 and β1) and regulatory (Rpt5) subunits was found to be present at low levels at birth and increased over time particularly at weaning. In contrast, while gradual developmental progression of proteasome structure was also seen with the immunoproteasome subunits (β1i, β5i, and β2i), these were not present at birth. Our studies demonstrate a developmental pattern to 26S proteasome activity and subunit expression, with low levels of core proteasome components and absence of immunoproteasomes at birth followed by increases at later developmental stages. This correlates with findings from other studies of a developmental hyporesponsiveness of the adaptive immune system to allow establishment of microbial colonization immediately after birth.
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Affiliation(s)
- Erika C Claud
- Departments of Pediatrics and Medicine, University of Chicago, Chicago, IL 60611, USA.
| | - Julie A K McDonald
- Gastrointestinal Diseases Research Unit, Department of Medicine, Queen's University, Kingston, ON K7L 2V7, Canada.
| | - Shu-Mei He
- Gastrointestinal Diseases Research Unit, Department of Medicine, Queen's University, Kingston, ON K7L 2V7, Canada.
| | - Yueyue Yu
- Departments of Pediatrics and Medicine, University of Chicago, Chicago, IL 60611, USA.
| | - Lily Duong
- Gastrointestinal Diseases Research Unit, Department of Medicine, Queen's University, Kingston, ON K7L 2V7, Canada.
| | - Jun Sun
- Department of Biochemistry, Rush University, Chicago, IL 60612, USA.
| | - Elaine O Petrof
- Gastrointestinal Diseases Research Unit, Department of Medicine, Queen's University, Kingston, ON K7L 2V7, Canada.
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Perluigi M, Di Domenico F, Buttterfield DA. Unraveling the complexity of neurodegeneration in brains of subjects with Down syndrome: insights from proteomics. Proteomics Clin Appl 2014; 8:73-85. [PMID: 24259517 DOI: 10.1002/prca.201300066] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 08/27/2013] [Accepted: 09/10/2013] [Indexed: 01/17/2023]
Abstract
Down syndrome (DS) is one of the most common genetic causes of intellectual disability characterized by multiple pathological phenotypes, among which neurodegeneration is a key feature. The neuropathology of DS is complex and likely results from impaired mitochondrial function, increased oxidative stress, and altered proteostasis. After the age of 40 years, many (most) DS individuals develop a type of dementia that closely resembles that of Alzheimer's disease with deposition of senile plaques and neurofibrillary tangles. A number of studies demonstrated that increased oxidative damage, accumulation of damaged/misfolded protein aggregates, and dysfunction of intracellular degradative systems are critical events in the neurodegenerative processes. This review summarizes the current knowledge that demonstrates a “chronic” condition of oxidative stress in DS pointing to the putative molecular pathways that could contribute to accelerate cognition and memory decline. Proteomics and redox proteomics studies are powerful tools to unravel the complexity of DS phenotypes, by allowing to identifying protein expression changes and oxidative PTMs that are proved to be detrimental for protein function. It is reasonable to suggest that changes in the cellular redox status in DS neurons, early from the fetal period, could provide a fertile environment upon which increased aging favors neurodegeneration. Thus, after a critical age, DS neuropathology can be considered a human model of early Alzheimer's disease and could contribute to understanding the overlapping mechanisms that lead from normal aging to development of dementia.
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Lei Z, Brizzee C, Johnson GVW. BAG3 facilitates the clearance of endogenous tau in primary neurons. Neurobiol Aging 2014; 36:241-8. [PMID: 25212465 DOI: 10.1016/j.neurobiolaging.2014.08.012] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/30/2014] [Accepted: 08/12/2014] [Indexed: 12/17/2022]
Abstract
Tau is a microtubule associated protein that is found primarily in neurons, and in pathologic conditions, such as Alzheimer's disease (AD) it accumulates and contributes to the disease process. Because tau plays a fundamental role in the pathogenesis of AD and other tauopathies, and in AD mouse models reducing tau levels improves outcomes, approaches that facilitate tau clearance are being considered as therapeutic strategies. However, fundamental to the development of such interventions is a clearer understanding of the mechanisms that regulate tau clearance. Here, we report a novel mechanism of tau degradation mediated by the co-chaperone BAG3. BAG3 has been shown to be an essential component of a complex that targets substrates to the autophagy pathway for degradation. In rat primary neurons, activation of autophagy by inhibition of proteasome activity or treatment with trehalose resulted in significant decreases in tau and phospho-tau levels. These treatments also induced an upregulation of BAG3. Proteasome inhibition activated JNK, which was responsible for the upregulation of BAG3 and increased tau clearance. Inhibiting JNK or knocking down BAG3 blocked the proteasome inhibition-induced decreases in tau. Further, BAG3 overexpression alone resulted in significant decreases in tau and phospho-tau levels in neurons. These results indicate that BAG3 plays a critical role in regulating the levels of tau in neurons, and interventions that increase BAG3 levels could provide a therapeutic approach in the treatment of AD.
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Affiliation(s)
- Zhinian Lei
- Department of Anesthesiology, University of Rochester Medical Center, University of Rochester, Rochester, NY, USA
| | - Corey Brizzee
- Department of Anesthesiology, University of Rochester Medical Center, University of Rochester, Rochester, NY, USA
| | - Gail V W Johnson
- Department of Anesthesiology, University of Rochester Medical Center, University of Rochester, Rochester, NY, USA.
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Sansanwal P, Li L, Sarwal MM. Inhibition of intracellular clusterin attenuates cell death in nephropathic cystinosis. J Am Soc Nephrol 2014; 26:612-25. [PMID: 25071085 DOI: 10.1681/asn.2013060577] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Nephropathic cystinosis, characterized by accumulation of cystine in the lysosomes, is caused by mutations in CTNS. The molecular and cellular mechanisms underlying proximal tubular dysfunction and progressive renal failure in nephropathic cystinosis are largely unclear, and increasing evidence supports the notion that cystine accumulation alone is not responsible for the end organ injury in cystinosis. We previously identified clusterin as potentially involved in nephropathic cystinosis. Here, we studied the expression of clusterin in renal proximal tubular epithelial cells obtained from patients with nephropathic cystinosis. The cytoprotective secretory form of clusterin, as evaluated by Western blot analysis, was low or absent in cystinosis cells compared with normal primary cells. Confocal microscopy revealed elevated levels of intracellular clusterin in cystinosis cells. Clusterin in cystinosis cells localized to the nucleus and cytoplasm and showed a filamentous and punctate aggresome-like pattern compared with diffuse cytoplasmic staining in normal cells. In kidney biopsy samples from patients with nephropathic cystinosis, clusterin protein expression was mainly limited to the proximal tubular cells. Furthermore, expression of clusterin overlapped with the expression of apoptotic proteins (apoptosis-inducing factor and cleaved caspase-3) and autophagy proteins (LC3 II and p62). Silencing of the clusterin gene resulted in a significant increase in cell viability and attenuation of apoptosis in cystinosis cells. Results of this study identify clusterin as a pivotal factor in the cell injury mechanism of nephropathic cystinosis and provide evidence linking cellular stress and injury to Fanconi syndrome and progressive renal injury in nephropathic cystinosis.
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Affiliation(s)
- Poonam Sansanwal
- California Pacific Medical Center Research Institute, San Francisco, California;
| | - Li Li
- Department of Genetics and Genomic Sciences, Mount Sinai School of Medicine, New York, New York; and
| | - Minnie M Sarwal
- California Pacific Medical Center Research Institute, San Francisco, California; Department of Surgery, Univeristy of California, San Francisco, School of Medicine, San Francisco, California
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Oxidative Stress and Proteostasis Network: Culprit and Casualty of Alzheimer’s-Like Neurodegeneration. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/527518] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Free radical-mediated damage to proteins is particularly important in aging and age-related neurodegenerative diseases, because in the majority of cases it is a non-reversible phenomenon that requires clearance systems for removal. Major consequences of protein oxidation are loss of protein function and the formation of large protein aggregates, which are often toxic to cells if allowed to accumulate. Deposition of aggregated, misfolded, and oxidized proteins may also result from the impairment of protein quality control (PQC) system, including protein unfolded response, proteasome, and autophagy. Perturbations of such components of the proteostasis network that provides a critical protective role against stress conditions are emerging as relevant factor in triggering neuronal death. In this outlook paper, we discuss the role of protein oxidation as a major contributing factor for the impairment of the PQC regulating protein folding, surveillance, and degradation. Recent studies from our group and from others aim to better understand the link between Down syndrome and Alzheimer’s disease neuropathology. We propose oxidative stress and alteration of proteostasis network as a possible unifying mechanism triggering neurodegeneration.
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Chondrogianni N, Sakellari M, Lefaki M, Papaevgeniou N, Gonos ES. Proteasome activation delays aging in vitro and in vivo. Free Radic Biol Med 2014; 71:303-320. [PMID: 24681338 DOI: 10.1016/j.freeradbiomed.2014.03.031] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 03/18/2014] [Accepted: 03/18/2014] [Indexed: 02/02/2023]
Abstract
Aging is a natural biological process that is characterized by a progressive accumulation of macromolecular damage. In the proteome, aging is accompanied by decreased protein homeostasis and function of the major cellular proteolytic systems, leading to the accumulation of unfolded, misfolded, or aggregated proteins. In particular, the proteasome is responsible for the removal of normal as well as damaged or misfolded proteins. Extensive work during the past several years has clearly demonstrated that proteasome activation by either genetic means or use of compounds significantly retards aging. Importantly, this represents a common feature across evolution, thereby suggesting proteasome activation to be an evolutionarily conserved mechanism of aging and longevity regulation. This review article reports on the means of function of these proteasome activators and how they regulate aging in various species.
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Affiliation(s)
- Niki Chondrogianni
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry, and Biotechnology, 116 35 Athens, Greece.
| | - Marianthi Sakellari
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry, and Biotechnology, 116 35 Athens, Greece; Örebro University Medical School, Örebro, Sweden
| | - Maria Lefaki
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry, and Biotechnology, 116 35 Athens, Greece
| | - Nikoletta Papaevgeniou
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry, and Biotechnology, 116 35 Athens, Greece
| | - Efstathios S Gonos
- National Hellenic Research Foundation, Institute of Biology, Medicinal Chemistry, and Biotechnology, 116 35 Athens, Greece; Örebro University Medical School, Örebro, Sweden
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Gohlke S, Mishto M, Textoris-Taube K, Keller C, Giannini C, Vasuri F, Capizzi E, D’Errico-Grigioni A, Kloetzel PM, Dahlmann B. Molecular alterations in proteasomes of rat liver during aging result in altered proteolytic activities. AGE (DORDRECHT, NETHERLANDS) 2014; 36:57-72. [PMID: 23690132 PMCID: PMC3889881 DOI: 10.1007/s11357-013-9543-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 05/08/2013] [Indexed: 06/02/2023]
Abstract
Aging induces alterations of tissue protein homoeostasis. To investigate one of the major systems catalysing intracellular protein degradation we have purified 20S proteasomes from rat liver of young (2 months) and aged (23 months) animals and separated them into three subpopulations containing different types of intermediate proteasomes with standard- and immuno-subunits. The smallest subpopulation ΙΙΙ and the major subpopulation Ι comprised proteasomes containing immuno-subunits β1i and β5i beside small amounts of standard-subunits, whereas proteasomes of subpopulation ΙΙ contained only β5i beside standard-subunits. In favour of a relative increase of the major subpopulation Ι, subpopulation ΙΙ and ΙΙΙ were reduced for about 55 % and 80 %, respectively, in aged rats. Furthermore, in all three 20S proteasome subpopulations from aged animals standard-active site subunits were replaced by immuno-subunits. Overall, this transformation resulted in a relative increase of immuno-subunit-containing proteasomes, paralleled by reduced activity towards short fluorogenic peptide substrates. However, depending on the substrate their hydrolysing activity of long polypeptide substrates was significantly higher or unchanged. Furthermore, our data revealed an altered MHC class I antigen-processing efficiency of 20S proteasomes from liver of aged rats. We therefore suggest that the age-related intramolecular alteration of hepatic proteasomes modifies its cleavage preferences without a general decrease of its activity. Such modifications could have implications on protein homeostasis as well as on MHC class I antigen presentation as part of the immunosenescence process.
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Affiliation(s)
- Sabrina Gohlke
- />Institute of Biochemistry, Charité-Universitätsmedizin Berlin, CCM, CharitéCrossOver, Charitéplatz 1, 10117 Berlin, Germany
| | - Michele Mishto
- />Institute of Biochemistry, Charité-Universitätsmedizin Berlin, CCM, CharitéCrossOver, Charitéplatz 1, 10117 Berlin, Germany
- />Centro Interdipartimentale di Ricerca sul Cancro “Giorgio Prodi”, University of Bologna, Bologna, Italy
| | - Kathrin Textoris-Taube
- />Institute of Biochemistry, Charité-Universitätsmedizin Berlin, CCM, CharitéCrossOver, Charitéplatz 1, 10117 Berlin, Germany
| | - Christin Keller
- />Institute of Biochemistry, Charité-Universitätsmedizin Berlin, CCM, CharitéCrossOver, Charitéplatz 1, 10117 Berlin, Germany
| | - Carolin Giannini
- />Institute of Biochemistry, Charité-Universitätsmedizin Berlin, CCM, CharitéCrossOver, Charitéplatz 1, 10117 Berlin, Germany
| | - Francesco Vasuri
- />“F. Addarii” Institute of Oncology and Transplant Pathology, S.Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Elisa Capizzi
- />“F. Addarii” Institute of Oncology and Transplant Pathology, S.Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Antonia D’Errico-Grigioni
- />“F. Addarii” Institute of Oncology and Transplant Pathology, S.Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy
| | - Peter-Michael Kloetzel
- />Institute of Biochemistry, Charité-Universitätsmedizin Berlin, CCM, CharitéCrossOver, Charitéplatz 1, 10117 Berlin, Germany
| | - Burkhardt Dahlmann
- />Institute of Biochemistry, Charité-Universitätsmedizin Berlin, CCM, CharitéCrossOver, Charitéplatz 1, 10117 Berlin, Germany
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Ameliorating replicative senescence of human bone marrow stromal cells by PSMB5 overexpression. Biochem Biophys Res Commun 2014; 443:1182-8. [PMID: 24393841 DOI: 10.1016/j.bbrc.2013.12.113] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 12/20/2013] [Indexed: 02/08/2023]
Abstract
Multipotent human bone marrow stromal cells (hBMSCs) potentially serve as a source for cell-based therapy in regenerative medicine. However, in vitro expansion was inescapably accompanied with cell senescence, characterized by inhibited proliferation and compromised pluripotency. We have previously demonstrated that this aging process is closely associated with reduced 20S proteasomal activity, with down-regulation of rate-limiting catalytic β-subunits particularly evident. In the present study, we confirmed that proteasomal activity directly contributes to senescence of hBMSCs, which could be reversed by overexpression of the β5-subunit (PSMB5). Knocking down PSMB5 led to decreased proteasomal activity concurrent with reduced cell proliferation in early-stage hBMSCs, which is similar to the senescent phenotype observed in late-stage cells. In contrast, overexpressing PSMB5 in late-stage cells efficiently restored the normal activity of 20S proteasomes and promoted cell growth, possibly via upregulating the Cyclin D1/CDK4 complex. Additionally, PSMB5 could enhance cell resistance to oxidative stress, as evidenced by the increased cell survival upon exposing senescent hBMSCs to hydrogen peroxide. Furthermore, PSMB5 overexpression retained the pluripotency of late-stage hBMSCs by facilitating their neural differentiation both in vitro and in vivo. Collectively, our work reveals a critical role of PSMB5 in 20S proteasome-mediated protection against replicative senescence, pointing to a possible strategy for maintaining the integrity of culture-expanded hBMSCs by manipulating the expression of PSMB5.
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Poly-Ub-substrate-degradative activity of 26S proteasome is not impaired in the aging rat brain. PLoS One 2013; 8:e64042. [PMID: 23667697 PMCID: PMC3646778 DOI: 10.1371/journal.pone.0064042] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 04/11/2013] [Indexed: 12/21/2022] Open
Abstract
Proteostasis is critical for the maintenance of life. In neuronal cells an imbalance between protein synthesis and degradation is thought to be involved in the pathogenesis of neurodegenerative diseases during aging. Partly, this seems to be due to a decrease in the activity of the ubiquitin-proteasome system, wherein the 20S/26S proteasome complexes catalyse the proteolytic step. We have characterised 20S and 26S proteasomes from cerebrum, cerebellum and hippocampus of 3 weeks old (young) and 24 month old (aged) rats. Our data reveal that the absolute amount of the proteasome is not dfferent between both age groups. Within the majority of standard proteasomes in brain the minute amounts of immuno-subunits are slightly increased in aged rat brain. While this goes along with a decrease in the activities of 20S and 26S proteasomes to hydrolyse synthetic fluorogenic tripeptide substrates from young to aged rats, the capacity of 26S proteasomes for degradation of poly-Ub-model substrates and its activation by poly-Ub-substrates is not impaired or even slightly increased in brain of aged rats. We conclude that these alterations in proteasome properties are important for maintaining proteostasis in the brain during an uncomplicated aging process.
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45
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Chiba Y, Takei S, Kawamura N, Kawaguchi Y, Sasaki K, Hasegawa-Ishii S, Furukawa A, Hosokawa M, Shimada A. Immunohistochemical localization of aggresomal proteins in glial cytoplasmic inclusions in multiple system atrophy. Neuropathol Appl Neurobiol 2013; 38:559-71. [PMID: 22013984 DOI: 10.1111/j.1365-2990.2011.01229.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS Multiple system atrophy (MSA) is pathologically characterized by the formation of α-synuclein-containing glial cytoplasmic inclusions (GCIs) in oligodendrocytes. However, the mechanisms of GCI formation are not fully understood. Cellular machinery for the formation of aggresomes has been linked to the biogenesis of the Lewy body, a characteristic α-synuclein-containing inclusion of Parkinson's disease and dementia with Lewy bodies. Here, we examined whether GCIs contain the components of aggresomes by immunohistochemistry. METHODS Sections from five patients with MSA were stained immunohistochemically with antibodies against aggresome-related proteins and analysed in comparison with sections from five patients with no neurological disease. We evaluated the presence or absence of aggresome-related proteins in GCIs by double immunofluorescence and immunoelectron microscopy. RESULTS GCIs were clearly immunolabelled with antibodies against aggresome-related proteins, such as γ-tubulin, histone deacetylase 6 (HDAC6) and 20S proteasome subunits. Neuronal cytoplasmic inclusions (NCIs) were also immunopositive for these aggresome-related proteins. Double immunofluorescence staining and quantitative analysis demonstrated that the majority of GCIs contained these proteins, as well as other aggresome-related proteins, such as Hsp70, Hsp90 and 62-kDa protein/sequestosome 1 (p62/SQSTM1). Immunoelectron microscopy demonstrated immunoreactivities for γ-tubulin and HDAC6 along the fibrils comprising GCIs. CONCLUSIONS Our results indicate that GCIs, and probably NCIs, share at least some characteristics with aggresomes in terms of their protein components. Therefore, GCIs and NCIs may be another manifestation of aggresome-related inclusion bodies observed in neurodegenerative diseases.
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Affiliation(s)
- Y Chiba
- Department of Pathology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
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46
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McCoy RG, Nair KS. The 2010 ESPEN Sir David Cuthbertson Lecture: new and old proteins: clinical implications. Clin Nutr 2013; 32:728-36. [PMID: 23481224 DOI: 10.1016/j.clnu.2012.12.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 12/19/2012] [Indexed: 01/17/2023]
Abstract
The past century had witnessed vast advances in biomedical research, particularly in the fields of genomics and proteomics, yet the translation of these discoveries into clinical practice has been hindered by gaps in mechanistic understanding of variability governing disease susceptibility and pathogenesis. Among the greatest challenges are the dynamic nature of the proteome and the imperfect methodologies currently available to study it. Here, we review key recently developed proteomic techniques that have allowed for dynamic characterization of protein quality, as well as quantity, and discuss their potential applications in understanding aging and metabolic disorders including diabetes. These methodologies revealed that senescence is characterized, in part, by decreased rates of de novo protein synthesis and potentially also degradation, in addition to concomitantly increased levels of oxidative stress, ultimately resulting in excessive accumulation of damaged and dysfunctional proteins. Insulin may be a key mediator in these pathologies, as hyperinsulinemia has been shown to hinder protein degradation while transient insulin deficiency may accelerate oxidative damage. We also discuss two interventions that have been proposed to delay, and possibly reverse, senescence by augmenting protein degradation: chronic caloric restriction and aerobic exercise.
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Affiliation(s)
- Rozalina G McCoy
- Department of Internal Medicine, Division of Endocrinology, Endocrinology Research Unit, Mayo Clinic College of Medicine, Rochester, MN, USA
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Chondrogianni N, Petropoulos I, Grimm S, Georgila K, Catalgol B, Friguet B, Grune T, Gonos ES. Protein damage, repair and proteolysis. Mol Aspects Med 2012; 35:1-71. [PMID: 23107776 DOI: 10.1016/j.mam.2012.09.001] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 09/26/2012] [Indexed: 01/10/2023]
Abstract
Proteins are continuously affected by various intrinsic and extrinsic factors. Damaged proteins influence several intracellular pathways and result in different disorders and diseases. Aggregation of damaged proteins depends on the balance between their generation and their reversal or elimination by protein repair systems and degradation, respectively. With regard to protein repair, only few repair mechanisms have been evidenced including the reduction of methionine sulfoxide residues by the methionine sulfoxide reductases, the conversion of isoaspartyl residues to L-aspartate by L-isoaspartate methyl transferase and deglycation by phosphorylation of protein-bound fructosamine by fructosamine-3-kinase. Protein degradation is orchestrated by two major proteolytic systems, namely the lysosome and the proteasome. Alteration of the function for both systems has been involved in all aspects of cellular metabolic networks linked to either normal or pathological processes. Given the importance of protein repair and degradation, great effort has recently been made regarding the modulation of these systems in various physiological conditions such as aging, as well as in diseases. Genetic modulation has produced promising results in the area of protein repair enzymes but there are not yet any identified potent inhibitors, and, to our knowledge, only one activating compound has been reported so far. In contrast, different drugs as well as natural compounds that interfere with proteolysis have been identified and/or developed resulting in homeostatic maintenance and/or the delay of disease progression.
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Affiliation(s)
- Niki Chondrogianni
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Helenic Research Foundation, 48 Vas. Constantinou Ave., 116 35 Athens, Greece.
| | - Isabelle Petropoulos
- Laboratoire de Biologie Cellulaire du Vieillissement, UR4-UPMC, IFR 83, Université Pierre et Marie Curie-Paris 6, 4 Place Jussieu, 75005 Paris, France
| | - Stefanie Grimm
- Department of Nutritional Toxicology, Institute of Nutrition, Friedrich-Schiller University, Dornburger Straße 24, 07743 Jena, Germany
| | - Konstantina Georgila
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Helenic Research Foundation, 48 Vas. Constantinou Ave., 116 35 Athens, Greece
| | - Betul Catalgol
- Department of Biochemistry, Faculty of Medicine, Genetic and Metabolic Diseases Research Center (GEMHAM), Marmara University, Haydarpasa, Istanbul, Turkey
| | - Bertrand Friguet
- Laboratoire de Biologie Cellulaire du Vieillissement, UR4-UPMC, IFR 83, Université Pierre et Marie Curie-Paris 6, 4 Place Jussieu, 75005 Paris, France
| | - Tilman Grune
- Department of Nutritional Toxicology, Institute of Nutrition, Friedrich-Schiller University, Dornburger Straße 24, 07743 Jena, Germany
| | - Efstathios S Gonos
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Helenic Research Foundation, 48 Vas. Constantinou Ave., 116 35 Athens, Greece.
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Gavilán MP, Pintado C, Gavilán E, García-Cuervo LM, Castaño A, Ríos RM, Ruano D. Age-related differences in the dynamics of hippocampal proteasome recovery. J Neurochem 2012; 123:635-44. [PMID: 22913583 DOI: 10.1111/j.1471-4159.2012.07932.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 07/23/2012] [Accepted: 08/15/2012] [Indexed: 10/28/2022]
Abstract
Regulation of proteasome abundance to meet cell needs under stress conditions is critical for maintaining cellular homeostasis. However, the effects of aging on this homeostatic response remain unknown. In this report, we analyzed in young and aged rat hippocampus, the dynamics of proteasome recovery induced by proteasome stress. Proteasome inhibition in young rats leads to an early and coordinate transcriptional and translational up-regulation of both the catalytic subunits of constitutive proteasome and the proteasome maturation protein. By contrast, aged rats up-regulated the inducible catalytic subunits and showed a lower and shorter expression of proteasome maturation protein. This resulted in a faster recovery of proteasome activity in young rats. Importantly, proteasome inhibition highly affected pyramidal cells, leading to the accumulation of ubiquitinated proteins in perinuclear regions of aged, but not young pyramidal neurons. These data strongly suggest that age-dependent differences in proteasome level and composition could contribute to neurodegeneration induced by proteasome dysfunction in normal and pathological aging.
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Affiliation(s)
- M Paz Gavilán
- Departamento de Bioquímica y Biología Molecular, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain
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Lu L, Song HF, Zhang WG, Liu XQ, Zhu Q, Cheng XL, Yang GJ, Li A, Xiao ZC. Potential role of 20S proteasome in maintaining stem cell integrity of human bone marrow stromal cells in prolonged culture expansion. Biochem Biophys Res Commun 2012; 422:121-7. [PMID: 22564728 DOI: 10.1016/j.bbrc.2012.04.119] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 04/22/2012] [Indexed: 11/25/2022]
Abstract
Human bone marrow stromal cells (hBMSCs) could be used in clinics as precursors of multiple cell lineages following proper induction. Such application is impeded by their characteristically short lifespan, together with the increasing loss of proliferation capability and progressive reduction of differentiation potential after the prolonged culture expansion. In the current study, we addressed the possible role of 20S proteasomes in this process. Consistent with prior reports, long-term in vitro expansion of hBMSCs decreased cell proliferation and increased replicative senescence, accompanied by reduced activity and expression of the catalytic subunits PSMB5 and PSMB1, and the 20S proteasome overall. Application of the proteasome inhibitor MG132 produced a senescence-like phenotype in early passages, whereas treating late-passage cells with 18α-glycyrrhetinic acid (18α-GA), an agonist of 20S proteasomes, delayed the senescence progress, enhancing the proliferation and recovering the capability of differentiation. The data demonstrate that activation of 20S proteasomes assists in counteracting replicative senescence of hBMSCs expanded in vitro.
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Affiliation(s)
- Li Lu
- Department of Anatomy, Shanxi Medical University, Taiyuan 030001, China.
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Tsolou A, Nelson G, Trachana V, Chondrogianni N, Saretzki G, von Zglinicki T, Gonos ES. The 19S proteasome subunit Rpn7 stabilizes DNA damage foci upon genotoxic insult. IUBMB Life 2012; 64:432-42. [DOI: 10.1002/iub.1018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 02/08/2012] [Indexed: 12/15/2022]
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