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He Y, Yang W, Huang L, Mever MAV, Ramautar R, Harms A, Rijksen Y, Brandt RMC, Barnhoorn S, Smit K, Jaarsma D, Lindenburg P, Hoeijmakers JHJ, Vermeij WP, Hankemeier T. Metabolomic analysis of dietary-restriction-induced attenuation of sarcopenia in prematurely aging DNA repair-deficient mice. J Cachexia Sarcopenia Muscle 2024. [PMID: 38689513 DOI: 10.1002/jcsm.13433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 12/17/2023] [Accepted: 12/20/2023] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND Sarcopenia is characterized by loss of skeletal muscle mass and function, and is a major risk factor for disability and independence in the elderly. Effective medication is not available. Dietary restriction (DR) has been found to attenuate aging and aging-related diseases, including sarcopenia, but the mechanism of both DR and sarcopenia are incompletely understood. METHODS In this study, mice body weight, fore and all limb grip strength, and motor learning and coordination performance were first analysed to evaluate the DR effects on muscle functioning. Liquid chromatography-mass spectrometry (LC-MS) was utilized for the metabolomics study of the DR effects on sarcopenia in progeroid DNA repair-deficient Ercc1∆/- and Xpg-/- mice, to identify potential biomarkers for attenuation of sarcopenia. RESULTS Muscle mass was significantly (P < 0.05) decreased (13-20%) by DR; however, the muscle quality was improved with retained fore limbs and all limbs grip strength in Ercc1∆/- and Xpg-/- mice. The LC-MS results revealed that metabolites and pathways related to oxidative-stress, that is, GSSG/GSH (P < 0.01); inflammation, that is, 9-HODE, 11-HETE (P < 0.05), PGE2, PGD2, and TXB2 (P < 0.01); and muscle growth (PGF2α) (P < 0.01) and regeneration stimulation (PGE2) (P < 0.05) are significantly downregulated by DR. On the other hand, anti-inflammatory indicator and several related metabolites, that is, β-hydroxybutyrate (P < 0.01), 14,15-DiHETE (P < 0.0001), 8,9-EET, 12,13-DiHODE, and PGF1 (P < 0.05); consumption of sources of energy (i.e., muscle and liver glycogen); and energy production pathways, that is, glycolysis (glucose, glucose-6-P, fructose-6-P) (P < 0.01), tricarboxylic acid cycle (succinyl-CoA, malate) (P < 0.001), and gluconeogenesis-related metabolite, alanine (P < 0.01), are significantly upregulated by DR. The notably (P < 0.01) down-modulated muscle growth (PGF2α) and regeneration (PGE2) stimulation metabolite and the increased consumption of glycogen in muscle and liver may be related to the significantly (P < 0.01) lower body weight and muscle mass by DR. The downregulated oxidative stress, pro-inflammatory mediators, and upregulated anti-inflammatory metabolites resulted in a lower energy expenditure, which contributed to enhanced muscle quality together with upregulated energy production pathways by DR. The improved muscle quality may explain why grip strength is maintained and motor coordination and learning performance are improved by DR in Ercc1∆/- and Xpg-/- mice. CONCLUSIONS This study provides fundamental supporting information on biomarkers and pathways related to the attenuation of sarcopenia, which might facilitate its diagnosis, prevention, and clinical therapy.
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Affiliation(s)
- Yupeng He
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Wei Yang
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Luojiao Huang
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Marlien Admiraal-van Mever
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Rawi Ramautar
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Amy Harms
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
| | - Yvonne Rijksen
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Renata M C Brandt
- Department of Molecular Genetics, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Sander Barnhoorn
- Department of Molecular Genetics, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Kimberly Smit
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Dick Jaarsma
- Department of Neuroscience, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Peter Lindenburg
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
- Research Group Metabolomics, Leiden Center for Applied Bioscience, University of Applied Sciences Leiden, Leiden, The Netherlands
| | - Jan H J Hoeijmakers
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
- Department of Molecular Genetics, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
- Institute for Genome Stability in Aging and Disease, Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Wilbert P Vermeij
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
- Oncode Institute, Utrecht, The Netherlands
| | - Thomas Hankemeier
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands
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He Y, van Mever M, Yang W, Huang L, Ramautar R, Rijksen Y, Vermeij WP, Hoeijmakers JHJ, Harms AC, Lindenburg PW, Hankemeier T. A Sample Preparation Method for the Simultaneous Profiling of Signaling Lipids and Polar Metabolites in Small Quantities of Muscle Tissues from a Mouse Model for Sarcopenia. Metabolites 2022; 12:metabo12080742. [PMID: 36005613 PMCID: PMC9413361 DOI: 10.3390/metabo12080742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
The metabolic profiling of a wide range of chemical classes relevant to understanding sarcopenia under conditions in which sample availability is limited, e.g., from mouse models, small muscles, or muscle biopsies, is desired. Several existing metabolomics platforms that include diverse classes of signaling lipids, energy metabolites, and amino acids and amines would be informative for suspected biochemical pathways involved in sarcopenia. The sample limitation requires an optimized sample preparation method with minimal losses during isolation and handling and maximal accuracy and reproducibility. Here, two developed sample preparation methods, BuOH-MTBE-Water (BMW) and BuOH-MTBE-More-Water (BMMW), were evaluated and compared with previously reported methods, Bligh-Dyer (BD) and BuOH-MTBE-Citrate (BMC), for their suitability for these classes. The most optimal extraction was found to be the BMMW method, with the highest extraction recovery of 63% for the signaling lipids and 81% for polar metabolites, and an acceptable matrix effect (close to 1.0) for all metabolites of interest. The BMMW method was applied on muscle tissues as small as 5 mg (dry weight) from the well-characterized, prematurely aging, DNA repair-deficient Ercc1∆/- mouse mutant exhibiting multiple-morbidities, including sarcopenia. We successfully detected 109 lipids and 62 polar targeted metabolites. We further investigated whether fast muscle tissue isolation is necessary for mouse sarcopenia studies. A muscle isolation procedure involving 15 min at room temperature revealed a subset of metabolites to be unstable; hence, fast sample isolation is critical, especially for more oxidative muscles. Therefore, BMMW and fast muscle tissue isolation are recommended for future sarcopenia studies. This research provides a sensitive sample preparation method for the simultaneous extraction of non-polar and polar metabolites from limited amounts of muscle tissue, supplies a stable mouse muscle tissue collection method, and methodologically supports future metabolomic mechanistic studies of sarcopenia.
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Affiliation(s)
- Yupeng He
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Marlien van Mever
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Wei Yang
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Luojiao Huang
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Rawi Ramautar
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Yvonne Rijksen
- Princess Máxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands
- Oncode Institute, 3521 AL Utrecht, The Netherlands
| | - Wilbert P. Vermeij
- Princess Máxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands
- Oncode Institute, 3521 AL Utrecht, The Netherlands
| | - Jan H. J. Hoeijmakers
- Princess Máxima Center for Pediatric Oncology, 3584 CS Utrecht, The Netherlands
- Oncode Institute, 3521 AL Utrecht, The Netherlands
- Department of Molecular Genetics, Erasmus MC Cancer Institute, Erasmus University Medical Center Rotterdam, 3015 GD Rotterdam, The Netherlands
- Institute for Genome Stability in Aging and Disease, Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany
| | - Amy C. Harms
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Peter W. Lindenburg
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
- Research Group Metabolomics, Leiden Center for Applied Bioscience, University of Applied Sciences Leiden, 2333 CK Leiden, The Netherlands
| | - Thomas Hankemeier
- Metabolomics and Analytics Centre, Leiden Academic Centre for Drug Research, Faculty of Science, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
- Correspondence: ; Tel.: +31-71-527-1340
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Baar MP, Brandt RMC, Putavet DA, Klein JDD, Derks KWJ, Bourgeois BRM, Stryeck S, Rijksen Y, van Willigenburg H, Feijtel DA, van der Pluijm I, Essers J, van Cappellen WA, van IJcken WF, Houtsmuller AB, Pothof J, de Bruin RWF, Madl T, Hoeijmakers JHJ, Campisi J, de Keizer PLJ. Targeted Apoptosis of Senescent Cells Restores Tissue Homeostasis in Response to Chemotoxicity and Aging. Cell 2017; 169:132-147.e16. [PMID: 28340339 DOI: 10.1016/j.cell.2017.02.031] [Citation(s) in RCA: 837] [Impact Index Per Article: 119.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 12/29/2016] [Accepted: 02/22/2017] [Indexed: 02/06/2023]
Abstract
The accumulation of irreparable cellular damage restricts healthspan after acute stress or natural aging. Senescent cells are thought to impair tissue function, and their genetic clearance can delay features of aging. Identifying how senescent cells avoid apoptosis allows for the prospective design of anti-senescence compounds to address whether homeostasis can also be restored. Here, we identify FOXO4 as a pivot in senescent cell viability. We designed a FOXO4 peptide that perturbs the FOXO4 interaction with p53. In senescent cells, this selectively causes p53 nuclear exclusion and cell-intrinsic apoptosis. Under conditions where it was well tolerated in vivo, this FOXO4 peptide neutralized doxorubicin-induced chemotoxicity. Moreover, it restored fitness, fur density, and renal function in both fast aging XpdTTD/TTD and naturally aged mice. Thus, therapeutic targeting of senescent cells is feasible under conditions where loss of health has already occurred, and in doing so tissue homeostasis can effectively be restored.
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Affiliation(s)
- Marjolein P Baar
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Renata M C Brandt
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Diana A Putavet
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Julian D D Klein
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Kasper W J Derks
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Benjamin R M Bourgeois
- Institute of Molecular Biology & Biochemistry, Center of Molecular Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Sarah Stryeck
- Institute of Molecular Biology & Biochemistry, Center of Molecular Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Yvonne Rijksen
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Hester van Willigenburg
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Danny A Feijtel
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Ingrid van der Pluijm
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; Department of Vascular Surgery, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Jeroen Essers
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; Department of Vascular Surgery, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; Department of Radiation Oncology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Wiggert A van Cappellen
- Erasmus Optical Imaging Center and Department of Pathology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Wilfred F van IJcken
- Department of Cell Biology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Adriaan B Houtsmuller
- Erasmus Optical Imaging Center and Department of Pathology, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Joris Pothof
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Ron W F de Bruin
- Department of Surgery, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Tobias Madl
- Institute of Molecular Biology & Biochemistry, Center of Molecular Medicine, Medical University of Graz, 8010 Graz, Austria
| | - Jan H J Hoeijmakers
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands
| | - Judith Campisi
- The Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA; Lawrence Berkeley National Laboratories, Berkeley, CA 94720, USA
| | - Peter L J de Keizer
- Department of Molecular Genetics, Erasmus University Medical Center Rotterdam, Wytemaweg 80, 3015CN, Rotterdam, the Netherlands; The Buck Institute for Research on Aging, 8001 Redwood Blvd., Novato, CA 94945, USA.
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4
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de Graaf EL, Vermeij WP, de Waard MC, Rijksen Y, van der Pluijm I, Hoogenraad CC, Hoeijmakers JHJ, Altelaar AFM, Heck AJR. Spatio-temporal analysis of molecular determinants of neuronal degeneration in the aging mouse cerebellum. Mol Cell Proteomics 2013; 12:1350-62. [PMID: 23399551 DOI: 10.1074/mcp.m112.024950] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The accumulation of cellular damage, including DNA damage, is hypothesized to contribute to aging-related neurodegenerative changes. DNA excision repair cross-complementing group 1 (Ercc1) knock-out mice represent an accepted model of neuronal aging, showing gradual neurodegenerative changes, including loss of synaptic contacts and cell body shrinkage. Here, we used the Purkinje cell-specific Ercc1 DNA-repair knock-out mouse model to study aging in the mouse cerebellum. We performed an in-depth quantitative proteomics analysis, using stable isotope dimethyl labeling, to decipher changes in protein expression between the early (8 weeks), intermediate (16 weeks), and late (26 weeks) stages of the phenotypically aging Ercc1 knock-out and healthy littermate control mice. The expression of over 5,200 proteins from the cerebellum was compared quantitatively, whereby 79 proteins (i.e. 1.5%) were found to be substantially regulated during aging. Nearly all of these molecular markers of the early aging onset belonged to a strongly interconnected network involved in excitatory synaptic signaling. Using immunohistological staining, we obtained temporal and spatial profiles of these markers confirming not only the proteomics data but in addition revealed how the change in protein expression correlates to synaptic changes in the cerebellum. In summary, this study provides a highly comprehensive spatial and temporal view of the dynamic changes in the cerebellum and Purkinje cell signaling in particular, indicating that synapse signaling is one of the first processes to be affected in this premature aging model, leading to neuron morphological changes, neuron degeneration, inflammation, and ultimately behavior disorders.
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Affiliation(s)
- Erik L de Graaf
- Biomolecular Mass Spectrometry and Proteomics Group, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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Bombardieri C, Quayle C, Rebel H, Rijksen Y, de Gruijl F, Hoeijmakers J, Menck CFM, van der Horst G. Differential role of UVB-induced photolesions in skin and immune response. (50.10). The Journal of Immunology 2011. [DOI: 10.4049/jimmunol.186.supp.50.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
UV-induced DNA damage is an essential step in the process by which UVB can alter host resistance to infections diseases. UV-light induces two types of photolesion on DNA that are repaired by photolyases (absent in placental mammals) or Nucleotide Excision Repair. Photolyases are capable of repair these lesions using a photon of light as source of energy. Although the deleterious effects of UV are widely known, the specific role of each photolesion in the induction of changes in the immune response remains unknown. It has been shown in vivo that CPDs are responsible for the majority of the effects after UVB skin irradiation of DNA repair proficient mice, such as erythema, apoptosis, hyperplasia, tumorigenesis and immunosuppression. However the role of 6-4PP is still unknown. We show that the removal of CPD lesions prevents hyperplasia and induces dark skin pigmentation. When 6-4PPs were removed, UVB promoted hyperplasia and tanning. Also, unlike 6-4PP removal, CPD removal is capable of preventing the development of p53 epidermal patches, which have a direct correlation with carcinoma development. Furthermore, the CPD removal is sufficient to suppress the induction of Treg (CD4+CD25+Foxp3) in draining lymph nodes and spleen indicating a minor state of immunosuppression. This study can provide new information as how immune responses are regulated depending of the lesion that is repaired and improve our understanding the immune system role in skin cancer induction.
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Affiliation(s)
| | - Carolina Quayle
- 2University of São Paulo, Biomedical Sciences Institute II, São Paulo, Brazil
- 1ErasmusMC, Genetics Department, Rotterdam, Netherlands
| | - Heggert Rebel
- 3Leiden University Medical Center, Dermatology Department, Leiden, Netherlands
| | | | - Frank de Gruijl
- 3Leiden University Medical Center, Dermatology Department, Leiden, Netherlands
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de Waard MC, van der Pluijm I, Zuiderveen Borgesius N, Comley LH, Haasdijk ED, Rijksen Y, Ridwan Y, Zondag G, Hoeijmakers JHJ, Elgersma Y, Gillingwater TH, Jaarsma D. Age-related motor neuron degeneration in DNA repair-deficient Ercc1 mice. Acta Neuropathol 2010; 120:461-75. [PMID: 20602234 PMCID: PMC2923326 DOI: 10.1007/s00401-010-0715-9] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Revised: 05/25/2010] [Accepted: 06/24/2010] [Indexed: 11/16/2022]
Abstract
Degeneration of motor neurons contributes to senescence-associated loss of muscle function and underlies human neurodegenerative conditions such as amyotrophic lateral sclerosis and spinal muscular atrophy. The identification of genetic factors contributing to motor neuron vulnerability and degenerative phenotypes in vivo are therefore important for our understanding of the neuromuscular system in health and disease. Here, we analyzed neurodegenerative abnormalities in the spinal cord of progeroid Ercc1Δ/− mice that are impaired in several DNA repair systems, i.e. nucleotide excision repair, interstrand crosslink repair, and double strand break repair. Ercc1Δ/− mice develop age-dependent motor abnormalities, and have a shortened life span of 6–7 months. Pathologically, Ercc1Δ/− mice develop widespread astrocytosis and microgliosis, and motor neuron loss and denervation of skeletal muscle fibers. Degenerating motor neurons in many occasions expressed genotoxic-responsive transcription factors p53 or ATF3, and in addition, displayed a range of Golgi apparatus abnormalities. Furthermore, Ercc1Δ/− motor neurons developed perikaryal and axonal intermediate filament abnormalities reminiscent of cytoskeletal pathology observed in aging spinal cord. Our findings support the notion that accumulation of DNA damage and genotoxic stress may contribute to neuronal aging and motor neuron vulnerability in human neuromuscular disorders.
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Jans J, Garinis GA, Schul W, van Oudenaren A, Moorhouse M, Smid M, Sert YG, van der Velde A, Rijksen Y, de Gruijl FR, van der Spek PJ, Yasui A, Hoeijmakers JHJ, Leenen PJM, van der Horst GTJ. Differential role of basal keratinocytes in UV-induced immunosuppression and skin cancer. Mol Cell Biol 2006; 26:8515-26. [PMID: 16966369 PMCID: PMC1636796 DOI: 10.1128/mcb.00807-06] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cyclobutane pyrimidine dimers (CPDs) and 6-4 photoproducts (6-4PPs) comprise major UV-induced photolesions. If left unrepaired, these lesions can induce mutations and skin cancer, which is facilitated by UV-induced immunosuppression. Yet the contribution of lesion and cell type specificity to the harmful biological effects of UV exposure remains currently unclear. Using a series of photolyase-transgenic mice to ubiquitously remove either CPDs or 6-4PPs from all cells in the mouse skin or selectively from basal keratinocytes, we show that the majority of UV-induced acute effects to require the presence of CPDs in basal keratinocytes in the mouse skin. At the fundamental level of gene expression, CPDs induce the expression of genes associated with repair and recombinational processing of DNA damage, as well as apoptosis and a response to stress. At the organismal level, photolyase-mediated removal of CPDs, but not 6-4PPs, from the genome of only basal keratinocytes substantially diminishes the incidence of skin tumors; however, it does not affect the UVB-mediated immunosuppression. Taken together, these findings reveal a differential role of basal keratinocytes in these processes, providing novel insights into the skin's acute and chronic responses to UV in a lesion- and cell-type-specific manner.
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Affiliation(s)
- Judith Jans
- MGC, Department of Cell Biology and Genetics, Center for Biomedical Genetics, Erasmus University Medical Center, 3000 DR Rotterdam, The Netherlands
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8
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Jans J, Schul W, Sert YG, Rijksen Y, Rebel H, Eker APM, Nakajima S, van Steeg H, de Gruijl FR, Yasui A, Hoeijmakers JHJ, van der Horst GTJ. Powerful skin cancer protection by a CPD-photolyase transgene. Curr Biol 2005; 15:105-15. [PMID: 15668165 DOI: 10.1016/j.cub.2005.01.001] [Citation(s) in RCA: 155] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2004] [Revised: 11/15/2004] [Accepted: 11/23/2004] [Indexed: 10/25/2022]
Abstract
BACKGROUND The high and steadily increasing incidence of ultraviolet-B (UV-B)-induced skin cancer is a problem recognized worldwide. UV introduces different types of damage into the DNA, notably cyclobutane pyrimidine dimers (CPDs) and (6-4) photoproducts (6-4PPs). If unrepaired, these photolesions can give rise to cell death, mutation induction, and onset of carcinogenic events, but the relative contribution of CPDs and 6-4PPs to these biological consequences of UV exposure is hardly known. Because placental mammals have undergone an evolutionary loss of photolyases, repair enzymes that directly split CPDs and 6-4PPs into the respective monomers in a light-dependent and lesion-specific manner, they can only repair UV-induced DNA damage by the elaborate nucleotide excision repair pathway. RESULTS To assess the relative contribution of CPDs and 6-4PPs to the detrimental effects of UV light, we generated transgenic mice that ubiquitously express CPD-photolyase, 6-4PP-photolyase, or both, thereby allowing rapid light-dependent repair of CPDs and/or 6-4PPs in the skin. We show that the vast majority of (semi)acute responses in the UV-exposed skin (i.e., sunburn, apoptosis, hyperplasia, and mutation induction) can be ascribed to CPDs. Moreover, CPD-photolyase mice, in contrast to 6-4PP-photolyase mice, exhibit superior resistance to sunlight-induced tumorigenesis. CONCLUSIONS Our data unequivocally identify CPDs as the principal cause of nonmelanoma skin cancer and provide genetic evidence that CPD-photolyase enzymes can be employed as effective tools to combat skin cancer.
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Affiliation(s)
- Judith Jans
- Department of Genetics, Medical Genetics Center, Center for Biomedical Genetics, Erasmus University Medical Center, Rotterdam, Post Office Box 1738, 3000 DR Rotterdam, The Netherlands
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