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Mazzini L, De Marchi F, Buzanska L, Follenzi A, Glover JC, Gelati M, Lombardi I, Maioli M, Mesa-Herrera F, Mitrečić D, Olgasi C, Pivoriūnas A, Sanchez-Pernaute R, Sgromo C, Zychowicz M, Vescovi A, Ferrari D. Current status and new avenues of stem cell-based preclinical and therapeutic approaches in amyotrophic lateral sclerosis. Expert Opin Biol Ther 2024; 24:933-954. [PMID: 39162129 DOI: 10.1080/14712598.2024.2392307] [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: 01/24/2024] [Accepted: 08/10/2024] [Indexed: 08/21/2024]
Abstract
INTRODUCTION Cell therapy development represents a critical challenge in amyotrophic lateral sclerosis (ALS) research. Despite more than 20 years of basic and clinical research, no definitive safety and efficacy results of cell-based therapies for ALS have been published. AREAS COVERED This review summarizes advances using stem cells (SCs) in pre-clinical studies to promote clinical translation and in clinical trials to treat ALS. New technologies have been developed and new experimental in vitro and animal models are now available to facilitate pre-clinical research in this field and to determine the most promising approaches to pursue in patients. New clinical trial designs aimed at developing personalized SC-based treatment with biological endpoints are being defined. EXPERT OPINION Knowledge of the basic biology of ALS and on the use of SCs to study and potentially treat ALS continues to grow. However, a consensus has yet to emerge on how best to translate these results into therapeutic applications. The selection and follow-up of patients should be based on clinical, biological, and molecular criteria. Planning of SC-based clinical trials should be coordinated with patient profiling genetically and molecularly to achieve personalized treatment. Much work within basic and clinical research is still needed to successfully transition SC therapy in ALS.
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Affiliation(s)
- Letizia Mazzini
- ALS Center, Neurology Unit, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy
| | - Fabiola De Marchi
- ALS Center, Neurology Unit, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy
| | - Leonora Buzanska
- Department of Stem Cell Bioengineering, Mossakowski Medical Research Institute, Polish Academy of Sciences, Warsaw, Poland
| | - Antonia Follenzi
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale, Novara, Italy
- Dipartimento Attività Integrate Ricerca Innovazione, Azienda Ospedaliero-Universitaria SS. Antonio e Biagio e C. Arrigo, Alessandria, Italy
| | - Joel Clinton Glover
- Norwegian Center for Stem Cell Research, Department of Immunology and Transfusion Medicine, Oslo University Hospital; Laboratory of Neural Development and Optical Recording (NDEVOR), Oslo, Norway
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Maurizio Gelati
- Unità Produttiva per Terapie Avanzate (UPTA), IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Ivan Lombardi
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, Italy
| | - Margherita Maioli
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
- Center for Developmental Biology and Reprogramming-CEDEBIOR, University of Sassari, Sassari, Italy
| | - Fatima Mesa-Herrera
- Reprogramming and Neural Regeneration Lab, BioBizkaia Health Research Institute, Barakaldo, Spain
| | - Dinko Mitrečić
- Laboratory for Stem Cells, Croatian Institute for Brain Research and Department of Histology and Embryology, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Cristina Olgasi
- Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy
| | - Augustas Pivoriūnas
- Department of Stem Cell Biology, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
| | - Rosario Sanchez-Pernaute
- Reprogramming and Neural Regeneration Lab, BioBizkaia Health Research Institute, Barakaldo, Spain
- Ikerbaske, Basque Foundation for Science, Bilbao, Spain
| | - Chiara Sgromo
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale, Novara, Italy
| | - Marzena Zychowicz
- Department of Stem Cell Bioengineering, Mossakowski Medical Research Institute, Polish Academy of Sciences, Warsaw, Poland
| | - Angelo Vescovi
- Unità Produttiva per Terapie Avanzate (UPTA), IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, Italy
| | - Daniela Ferrari
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, Italy
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Mitra J, Dharmalingam P, Kodavati MM, Guerrero EN, Rao KS, Garruto R, Hegde ML. Endogenous TDP-43 mislocalization in a novel knock-in mouse model reveals DNA repair impairment, inflammation, and neuronal senescence. RESEARCH SQUARE 2024:rs.3.rs-3879966. [PMID: 38343852 PMCID: PMC10854316 DOI: 10.21203/rs.3.rs-3879966/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/19/2024]
Abstract
TDP-43 mislocalization and aggregation are key pathological features of motor neuron diseases (MND) including amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). However, transgenic hTDP-43 WT or ∆NLS-overexpression animal models mainly capture late-stages TDP-43 proteinopathy, and do not provide a complete understanding of early motor neuron-specific pathology during pre-symptomatic phases. We have now addressed this shortcoming by generating a new endogenous knock-in (KI) mouse model using a combination of CRISPR/Cas9 and FLEX Cre-switch strategy for the conditional expression of a mislocalized Tdp-43∆NLS variant of mouse Tdp-43. This variant is either expressed conditionally in whole mice or specifically in the motor neurons. The mice exhibit loss of nuclear Tdp-43 concomitant with its cytosolic accumulation and aggregation in targeted cells, leading to increased DNA double-strand breaks (DSBs), signs of inflammation and DNA damage-associated cellular senescence. Notably, unlike WT Tdp43 which functionally interacts with Xrcc4 and DNA Ligase 4, the key DSB repair proteins in the non-homologous end-joining (NHEJ) pathway, the Tdp-43∆NLS mutant sequesters them into cytosolic aggregates, exacerbating neuronal damage in mice brain. The mutant mice also exhibit myogenic degeneration in limb muscles and distinct motor deficits, consistent with the characteristics of MND. Our findings reveal progressive degenerative mechanisms in motor neurons expressing endogenous Tdp-43∆NLS mutant, independent of TDP-43 overexpression or other confounding etiological factors. Thus, this unique Tdp-43 KI mouse model, which displays key molecular and phenotypic features of Tdp-43 proteinopathy, offers a significant opportunity to further characterize the early-stage progression of MND and also opens avenues for developing DNA repair-targeted approaches for treating TDP-43 pathology-linked neurodegenerative diseases.
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de Luzy IR, Lee MK, Mobley WC, Studer L. Lessons from inducible pluripotent stem cell models on neuronal senescence in aging and neurodegeneration. NATURE AGING 2024; 4:309-318. [PMID: 38429379 DOI: 10.1038/s43587-024-00586-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 02/01/2024] [Indexed: 03/03/2024]
Abstract
Age remains the central risk factor for many neurodegenerative diseases including Parkinson's disease, Alzheimer's disease and amyotrophic lateral sclerosis. Although the mechanisms of aging are complex, the age-related accumulation of senescent cells in neurodegeneration is well documented and their clearance can alleviate disease-related features in preclinical models. Senescence-like characteristics are observed in both neuronal and glial lineages, but their relative contribution to aging and neurodegeneration remains unclear. Human pluripotent stem cell-derived neurons provide an experimental model system to induce neuronal senescence. However, the extensive heterogeneity in the profile of senescent neurons and the methods to assess senescence remain major challenges. Here, we review the evidence of cellular senescence in neuronal aging and disease, discuss human pluripotent stem cell-based model systems used to investigate neuronal senescence and propose a panel of cellular and molecular hallmarks to characterize senescent neurons. Understanding the role of neuronal senescence may yield novel therapeutic opportunities in neurodegenerative disease.
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Affiliation(s)
- Isabelle R de Luzy
- The Center for Stem Cell Biology and Developmental Biology Program, Sloan-Kettering Institute for Cancer Research, New York, NY, USA.
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA.
| | - Michael K Lee
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, USA
- Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, USA
| | - William C Mobley
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
- Department of Neurosciences, University of California, San Diego, San Diego, CA, USA
| | - Lorenz Studer
- The Center for Stem Cell Biology and Developmental Biology Program, Sloan-Kettering Institute for Cancer Research, New York, NY, USA.
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA.
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Pitrez PR, Monteiro LM, Borgogno O, Nissan X, Mertens J, Ferreira L. Cellular reprogramming as a tool to model human aging in a dish. Nat Commun 2024; 15:1816. [PMID: 38418829 PMCID: PMC10902382 DOI: 10.1038/s41467-024-46004-5] [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: 09/29/2023] [Accepted: 02/12/2024] [Indexed: 03/02/2024] Open
Abstract
The design of human model systems is highly relevant to unveil the underlying mechanisms of aging and to provide insights on potential interventions to extend human health and life span. In this perspective, we explore the potential of 2D or 3D culture models comprising human induced pluripotent stem cells and transdifferentiated cells obtained from aged or age-related disorder-affected donors to enhance our understanding of human aging and to catalyze the discovery of anti-aging interventions.
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Affiliation(s)
- Patricia R Pitrez
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Luis M Monteiro
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal
- Faculty of Medicine, University of Coimbra, 3000-548, Coimbra, Portugal
- IIIUC-institute of Interdisciplinary Research, University of Coimbra, Casa Costa Alemão, Coimbra, 3030-789, Portugal
| | - Oliver Borgogno
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Xavier Nissan
- CECS, I-STEM, AFM, Institute for Stem Cell Therapy and Exploration of Monogenic diseases, Evry cedex, France
| | - Jerome Mertens
- Department of Neurosciences, University of California San Diego, La Jolla, CA, USA.
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA, USA.
| | - Lino Ferreira
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra, Portugal.
- Faculty of Medicine, University of Coimbra, 3000-548, Coimbra, Portugal.
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Zhang C, Saurat N, Cornacchia D, Chung SY, Sikder T, Minotti A, Studer L, Betel D. Identifying novel age-modulating compounds and quantifying cellular aging using novel computational framework for evaluating transcriptional age. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.03.547539. [PMID: 37461485 PMCID: PMC10349953 DOI: 10.1101/2023.07.03.547539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
The differentiation of human pluripotent stem cells (hPSCs) provides access to most cell types and tissues. However, hPSC-derived lineages capture a fetal-stage of development and methods to accelerate progression to an aged identity are limited. Understanding the factors driving cellular age and rejuvenation is also essential for efforts aimed at extending human life and health span. A prerequisite for such studies is the development of methods to score cellular age and simple readouts to assess the relative impact of various age modifying strategies. Here we established a transcriptional score (RNAge) in young versus old primary fibroblasts, frontal cortex and substantia nigra tissue. We validated the score in independent RNA-seq datasets and demonstrated a strong cell and tissue specificity. In fibroblasts we observed a reset of RNAge during iPSC reprogramming while direct reprogramming of aged fibroblasts to induced neurons (iN) resulted in the maintenance of both a neuronal and a fibroblast aging signature. Increased RNAge in hPSC-derived neurons was confirmed for several age-inducing strategies such as SATB1 loss, progerin expression or chemical induction of senescence (SLO). Using RNAge as a probe set, we next performed an in-silico screen using the LINCS L1000 dataset. We identified and validated several novel age-inducing and rejuvenating compounds, and we observed that RNAage captures age-related changes associated with distinct cellular hallmarks of age. Our study presents a simple tool to score age manipulations and identifies compounds that greatly expand the toolset of age-modifying strategies in hPSC derived lineages.
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Holloway K, Neherin K, Dam KU, Zhang H. Cellular senescence and neurodegeneration. Hum Genet 2023; 142:1247-1262. [PMID: 37115318 DOI: 10.1007/s00439-023-02565-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 04/20/2023] [Indexed: 04/29/2023]
Abstract
Advancing age is a major risk factor of Alzheimer's disease (AD). The worldwide prevalence of AD is approximately 50 million people, and this number is projected to increase substantially. The molecular mechanisms underlying the aging-associated susceptibility to cognitive impairment in AD are largely unknown. As a hallmark of aging, cellular senescence is a significant contributor to aging and age-related diseases including AD. Senescent neurons and glial cells have been detected to accumulate in the brains of AD patients and mouse models. Importantly, selective elimination of senescent cells ameliorates amyloid beta and tau pathologies and improves cognition in AD mouse models, indicating a critical role of cellular senescence in AD pathogenesis. Nonetheless, the mechanisms underlying when and how cellular senescence contributes to AD pathogenesis remain unclear. This review provides an overview of cellular senescence and discusses recent advances in the understanding of the impact of cellular senescence on AD pathogenesis, with brief discussions of the possible role of cellular senescence in other neurodegenerative diseases including Down syndrome, Parkinson's disease, multiple sclerosis, and amyotrophic lateral sclerosis.
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Affiliation(s)
- Kristopher Holloway
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA
| | - Kashfia Neherin
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA
| | - Kha Uyen Dam
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA
| | - Hong Zhang
- Department of Pediatrics, University of Massachusetts Chan Medical School, Worcester, MA, 01655, USA.
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Weiser A, Hermant A, Bermont F, Sizzano F, Karaz S, Alvarez-Illera P, Santo-Domingo J, Sorrentino V, Feige JN, De Marchi U. The mitochondrial calcium uniporter (MCU) activates mitochondrial respiration and enhances mobility by regulating mitochondrial redox state. Redox Biol 2023; 64:102759. [PMID: 37302345 PMCID: PMC10363449 DOI: 10.1016/j.redox.2023.102759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/14/2023] [Accepted: 05/21/2023] [Indexed: 06/13/2023] Open
Abstract
Regulation of mitochondrial redox balance is emerging as a key event for cell signaling in both physiological and pathological conditions. However, the link between the mitochondrial redox state and the modulation of these conditions remains poorly defined. Here, we discovered that activation of the evolutionary conserved mitochondrial calcium uniporter (MCU) modulates mitochondrial redox state. By using mitochondria-targeted redox and calcium sensors and genetic MCU-ablated models, we provide evidence of the causality between MCU activation and net reduction of mitochondrial (but not cytosolic) redox state. Redox modulation of redox-sensitive groups via MCU stimulation is required for maintaining respiratory capacity in primary human myotubes and C. elegans, and boosts mobility in worms. The same benefits are obtained bypassing MCU via direct pharmacological reduction of mitochondrial proteins. Collectively, our results demonstrate that MCU regulates mitochondria redox balance and that this process is required to promote the MCU-dependent effects on mitochondrial respiration and mobility.
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Affiliation(s)
- Anna Weiser
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland; Molecular Nutritional Medicine, Else Kröner Fresenius Center for Nutritional Medicine, Technische Universität München, 85354 Freising, Germany
| | - Aurélie Hermant
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Flavien Bermont
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Federico Sizzano
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Sonia Karaz
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Pilar Alvarez-Illera
- Department of Biochemistry and Molecular Biology, University of Valladolid, Unidad de Excelencia Instituto de Biología y Genética Molecular (IBGM), 47003 Valladolid, Spain
| | - Jaime Santo-Domingo
- Department of Biochemistry and Molecular Biology, University of Valladolid, Unidad de Excelencia Instituto de Biología y Genética Molecular (IBGM), 47003 Valladolid, Spain
| | - Vincenzo Sorrentino
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland; Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, 119228, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 117596, Singapore
| | - Jerome N Feige
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland
| | - Umberto De Marchi
- Nestlé Institute of Health Sciences, Nestlé Research, EPFL Innovation Park, CH-1015 Lausanne, Switzerland.
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Stoklund Dittlau K, Van Den Bosch L. Why should we care about astrocytes in a motor neuron disease? FRONTIERS IN MOLECULAR MEDICINE 2023; 3:1047540. [PMID: 39086676 PMCID: PMC11285655 DOI: 10.3389/fmmed.2023.1047540] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 01/13/2023] [Indexed: 08/02/2024]
Abstract
Amyotrophic lateral sclerosis (ALS) is the most common motor neuron disease in adults, causing progressive degeneration of motor neurons, which results in muscle atrophy, respiratory failure and ultimately death of the patients. The pathogenesis of ALS is complex, and extensive efforts have focused on unravelling the underlying molecular mechanisms with a large emphasis on the dying motor neurons. However, a recent shift in focus towards the supporting glial population has revealed a large contribution and influence in ALS, which stresses the need to explore this area in more detail. Especially studies into astrocytes, the residential homeostatic supporter cells of neurons, have revealed a remarkable astrocytic dysfunction in ALS, and therefore could present a target for new and promising therapeutic entry points. In this review, we provide an overview of general astrocyte function and summarize the current literature on the role of astrocytes in ALS by categorizing the potentially underlying molecular mechanisms. We discuss the current efforts in astrocyte-targeted therapy, and highlight the potential and shortcomings of available models.
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Affiliation(s)
- Katarina Stoklund Dittlau
- KU Leuven—University of Leuven, Department of Neurosciences, Experimental Neurology, and Leuven Brain Institute, Leuven, Belgium
- VIB Center for Brain and Disease Research, Laboratory of Neurobiology, Leuven, Belgium
| | - Ludo Van Den Bosch
- KU Leuven—University of Leuven, Department of Neurosciences, Experimental Neurology, and Leuven Brain Institute, Leuven, Belgium
- VIB Center for Brain and Disease Research, Laboratory of Neurobiology, Leuven, Belgium
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Mayerl SJ, Bajgai S, Ludwig AL, Jager LD, Williams BN, Bacig C, Stoddard C, Sinha D, Philpot BD, Gamm DM. Human retinal organoids harboring IMPG2 mutations exhibit a photoreceptor outer segment phenotype that models advanced retinitis pigmentosa. Stem Cell Reports 2022; 17:2409-2420. [PMID: 36206764 PMCID: PMC9669399 DOI: 10.1016/j.stemcr.2022.09.004] [Citation(s) in RCA: 6] [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: 05/16/2022] [Revised: 09/06/2022] [Accepted: 09/07/2022] [Indexed: 11/05/2022] Open
Abstract
Interphotoreceptor matrix proteoglycan 2 (IMPG2) mutations cause a severe form of early-onset retinitis pigmentosa (RP) with macular involvement. IMPG2 is expressed by photoreceptors and incorporated into the matrix that surrounds the inner and outer segments (OS) of rods and cones, but the mechanism of IMPG2-RP remains unclear. Loss of Impg2 function in mice produces a mild, late-onset photoreceptor phenotype without the characteristic OS loss that occurs in human patients. We generated retinal organoids (ROs) from patient-derived induced pluripotent stem (iPS) cells and gene-edited embryonic stem cells to model human IMPG2-RP in vitro. All ROs harboring IMPG2 mutations lacked an OS layer, in contrast to isogenic controls. Subsequent protein analyses revealed that this phenotype arises due to a loss of IMPG2 expression or its inability to undergo normal post-translational modifications. We hypothesized that loss of IMPG2 function destabilizes the interphotoreceptor matrix and renders the OS vulnerable to physical stressors, which is accentuated in the tissue culture environment. In support of this mechanism, transplantation of IMPG2 mutant ROs into the protected subretinal space of immunocompromised rodents restored OS production. Beyond providing a robust platform to study IMPG2-RP, this human RO model system may serve a broader role in honing strategies to treat advanced photoreceptor-based diseases.
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Affiliation(s)
- Steven J Mayerl
- Cellular and Molecular Pathology University of Wisconsin-Madison, Madison, WI, USA; McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, USA; Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Simona Bajgai
- Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Allison L Ludwig
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, USA; Waisman Center, University of Wisconsin-Madison, Madison, WI, USA; Comparative Biomedical Sciences, University of Wisconsin-Madison, Madison, WI, USA
| | - Lindsey D Jager
- Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Brittany N Williams
- Department of Cell Biology & Physiology, University of North Carolina, Chapel Hill, NC, USA; Carolina Institute for Developmental Disabilities, University of North Carolina, Chapel Hill, NC, USA; Neuroscience Center, University of North Carolina, Chapel Hill, NC, USA
| | - Cole Bacig
- Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Christopher Stoddard
- Department of Genetics and Genome Sciences, University of Connecticut School of Medicine, Farmington, CT, USA
| | - Divya Sinha
- McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, USA; Waisman Center, University of Wisconsin-Madison, Madison, WI, USA
| | - Benjamin D Philpot
- Department of Cell Biology & Physiology, University of North Carolina, Chapel Hill, NC, USA; Carolina Institute for Developmental Disabilities, University of North Carolina, Chapel Hill, NC, USA; Neuroscience Center, University of North Carolina, Chapel Hill, NC, USA
| | - David M Gamm
- Cellular and Molecular Pathology University of Wisconsin-Madison, Madison, WI, USA; McPherson Eye Research Institute, University of Wisconsin-Madison, Madison, WI, USA; Waisman Center, University of Wisconsin-Madison, Madison, WI, USA; Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, WI, USA.
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