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Kim Y. The impact of altered lamin B1 levels on nuclear lamina structure and function in aging and human diseases. Curr Opin Cell Biol 2023; 85:102257. [PMID: 37806292 DOI: 10.1016/j.ceb.2023.102257] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 10/10/2023]
Abstract
The role of lamin B1 in human health and aging has attracted increasing attention as mounting evidence reveals its significance in diverse cellular processes. Both upregulation and downregulation of lamin B1 have been implicated in age-associated organ dysfunctions and various human diseases, including central nervous system disorders. Additionally, lamin B1 levels undergo alterations in cancer cells, and a tumor-specific association exists between lamin B1 abundance and cancer aggressiveness. Investigating the connectivity between lamin B1 abundance and human health is of utmost importance for further research. This review presents recent advancements in understanding lamin B1's role in nuclear lamina function and its implications for human health.
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Affiliation(s)
- Youngjo Kim
- Department of Integrated Biomedical Science and Soonchunhyang Institute of Medi-Bioscience, Soonchunhyang University, Cheon-an 31151, Republic of Korea.
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2
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Neri I, Ramazzotti G, Mongiorgi S, Rusciano I, Bugiani M, Conti L, Cousin M, Giorgio E, Padiath QS, Vaula G, Cortelli P, Manzoli L, Ratti S. Understanding the Ultra-Rare Disease Autosomal Dominant Leukodystrophy: an Updated Review on Morpho-Functional Alterations Found in Experimental Models. Mol Neurobiol 2023; 60:6362-6372. [PMID: 37450245 PMCID: PMC10533580 DOI: 10.1007/s12035-023-03461-1] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Accepted: 06/22/2023] [Indexed: 07/18/2023]
Abstract
Autosomal dominant leukodystrophy (ADLD) is an ultra-rare, slowly progressive, and fatal neurodegenerative disorder associated with the loss of white matter in the central nervous system (CNS). Several years after its first clinical description, ADLD was found to be caused by coding and non-coding variants in the LMNB1 gene that cause its overexpression in at least the brain of patients. LMNB1 encodes for Lamin B1, a protein of the nuclear lamina. Lamin B1 regulates many cellular processes such as DNA replication, chromatin organization, and senescence. However, its functions have not been fully characterized yet. Nevertheless, Lamin B1 together with the other lamins that constitute the nuclear lamina has firstly the key role of maintaining the nuclear structure. Being the nucleus a dynamic system subject to both biochemical and mechanical regulation, it is conceivable that changes to its structural homeostasis might translate into functional alterations. Under this light, this review aims at describing the pieces of evidence that to date have been obtained regarding the effects of LMNB1 overexpression on cellular morphology and functionality. Moreover, we suggest that further investigation on ADLD morpho-functional consequences is essential to better understand this complex disease and, possibly, other neurological disorders affecting CNS myelination.
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Affiliation(s)
- Irene Neri
- Cellular Signalling Laboratory, Anatomy Centre, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126, Bologna, Italy
| | - Giulia Ramazzotti
- Cellular Signalling Laboratory, Anatomy Centre, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126, Bologna, Italy
| | - Sara Mongiorgi
- Cellular Signalling Laboratory, Anatomy Centre, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126, Bologna, Italy
| | - Isabella Rusciano
- Cellular Signalling Laboratory, Anatomy Centre, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126, Bologna, Italy
| | - Marianna Bugiani
- Department of Pathology, Amsterdam University Medical Centers, Vrije Universiteit and Amsterdam Neuroscience, 1105, Amsterdam, The Netherlands
| | - Luciano Conti
- Department of Cellular, Computational, and Integrative Biology (CIBIO), Università Degli Studi Di Trento, 38123, Povo-Trento, Italy
| | - Margot Cousin
- Center for Individualized Medicine and Department of Clinical Genomics, Mayo Clinic, Rochester, MN, 55905, USA
| | - Elisa Giorgio
- Department of Molecular Medicine, University of Pavia, 27100, Pavia, Italy
- Medical Genetics Unit, IRCCS Mondino Foundation, 27100, Pavia, Italy
| | - Quasar S Padiath
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Giovanna Vaula
- Department of Neuroscience, Azienda Ospedaliera-Universitaria Città della Salute e della Scienza, 10126, Turin, Italy
| | - Pietro Cortelli
- IRCCS, Istituto Di Scienze Neurologiche Di Bologna, 40139, Bologna, Italy
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126 , Bologna, Italy
| | - Lucia Manzoli
- Cellular Signalling Laboratory, Anatomy Centre, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126, Bologna, Italy
| | - Stefano Ratti
- Cellular Signalling Laboratory, Anatomy Centre, Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, 40126, Bologna, Italy.
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3
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Ratti S, Rusciano I, Mongiorgi S, Neri I, Cappellini A, Cortelli P, Suh PG, McCubrey JA, Manzoli L, Cocco L, Ramazzotti G. Lamin B1 Accumulation's Effects on Autosomal Dominant Leukodystrophy ( ADLD): Induction of Reactivity in the Astrocytes. Cells 2021; 10:2566. [PMID: 34685544 PMCID: PMC8534128 DOI: 10.3390/cells10102566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/30/2021] [Accepted: 09/24/2021] [Indexed: 11/16/2022] Open
Abstract
Autosomal dominant leukodystrophy (ADLD) is an extremely rare and fatal neurodegenerative disease due to the overexpression of the nuclear lamina component Lamin B1. Many aspects of the pathology still remain unrevealed. This work highlights the effect of Lamin B1 accumulation on different cellular functions in an ADLD astrocytic in vitro model. Lamin B1 overexpression induces alterations in cell survival signaling pathways with GSK3β inactivation, but not the upregulation of β-catenin targets, therefore resulting in a reduction in astrocyte survival. Moreover, Lamin B1 build up affects proliferation and cell cycle progression with an increase of PPARγ and p27 and a decrease of Cyclin D1. These events are also associated to a reduction in cell viability and an induction of apoptosis. Interestingly, ADLD astrocytes trigger a tentative activation of survival pathways that are ineffective. Finally, astrocytes overexpressing Lamin B1 show increased immunoreactivity for both GFAP and vimentin together with NF-kB phosphorylation and c-Fos increase, suggesting astrocytes reactivity and substantial cellular activation. These data demonstrate that Lamin B1 accumulation is correlated to biochemical, metabolic, and morphologic remodeling, probably related to the induction of a reactive astrocytes phenotype that could be strictly associated to ADLD pathological mechanisms.
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Affiliation(s)
- Stefano Ratti
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
| | - Isabella Rusciano
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
| | - Sara Mongiorgi
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
| | - Irene Neri
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
| | - Alessandra Cappellini
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
| | - Pietro Cortelli
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40139 Bologna, Italy;
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC NeuroMet, 40139 Bologna, Italy
| | - Pann-Ghill Suh
- Korea Brain Research Institute, Daegu 41062, Korea;
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea
| | - James A. McCubrey
- Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Greenville, NC 27834, USA;
| | - Lucia Manzoli
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
| | - Lucio Cocco
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
| | - Giulia Ramazzotti
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy; (S.R.); (I.R.); (S.M.); (I.N.); (A.C.); (G.R.)
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4
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Bijarnia-Mahay S, Roy G, Padiath QS, Saxena R, Verma IC. LMNB1 Duplication-Mediated Autosomal Dominant Adult-Onset Leukodystrophy in an Indian Family. Ann Indian Acad Neurol 2021; 24:413-416. [PMID: 34447008 PMCID: PMC8370147 DOI: 10.4103/aian.aian_1262_20] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/19/2021] [Accepted: 03/04/2021] [Indexed: 11/29/2022] Open
Abstract
Autosomal dominant leukodystrophy is an adult onset neurodegenerative disorder presenting with progressive symptoms of ataxia and autonomic dysfunction in fourth or fifth decade in life. It has clinical similarity with multiple sclerosis, but shows characteristic magnetic resonance imaging findings of diffuse bilaterally symmetrical leukodystrophy which can distinguish this disorder. It is a rare disorder with no known treatment till date, and has never been described from the Indian subcontinent. We present an Indian family with autosomal dominant adult-onset demyelinating leukodystrophy with multiple members affected over four generations, and demonstrate a cheap and accurate molecular method of real-time polymerase chain reaction to detect the LMNB1 gene duplication, which is the genetic basis of this devastating disorder.
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Affiliation(s)
- Sunita Bijarnia-Mahay
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Gaurav Roy
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Quasar S Padiath
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburg, Pittsburgh, PA, USA
| | - Renu Saxena
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
| | - Ishwar Chander Verma
- Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital, New Delhi, India
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5
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Ratti S, Rusciano I, Mongiorgi S, Owusu Obeng E, Cappellini A, Teti G, Falconi M, Talozzi L, Capellari S, Bartoletti-Stella A, Guaraldi P, Cortelli P, Suh PG, Cocco L, Manzoli L, Ramazzotti G. Cell signaling pathways in autosomal-dominant leukodystrophy ( ADLD): the intriguing role of the astrocytes. Cell Mol Life Sci 2021; 78:2781-2795. [PMID: 33034697 PMCID: PMC8004488 DOI: 10.1007/s00018-020-03661-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 09/02/2020] [Accepted: 09/28/2020] [Indexed: 12/17/2022]
Abstract
Autosomal-dominant leukodystrophy (ADLD) is a rare fatal neurodegenerative disorder with overexpression of the nuclear lamina component, Lamin B1 due to LMNB1 gene duplication or deletions upstream of the gene. The molecular mechanisms responsible for driving the onset and development of this pathology are not clear yet. Vacuolar demyelination seems to be one of the most significant histopathological observations of ADLD. Considering the role of oligodendrocytes, astrocytes, and leukemia inhibitory factor (LIF)-activated signaling pathways in the myelination processes, this work aims to analyze the specific alterations in different cell populations from patients with LMNB1 duplications and engineered cellular models overexpressing Lamin B1 protein. Our results point out, for the first time, that astrocytes may be pivotal in the evolution of the disease. Indeed, cells from ADLD patients and astrocytes overexpressing LMNB1 show severe ultrastructural nuclear alterations, not present in oligodendrocytes overexpressing LMNB1. Moreover, the accumulation of Lamin B1 in astrocytes induces a reduction in LIF and in LIF-Receptor (LIF-R) levels with a consequential decrease in LIF secretion. Therefore, in both our cellular models, Jak/Stat3 and PI3K/Akt axes, downstream of LIF/LIF-R, are downregulated. Significantly, the administration of exogenous LIF can partially reverse the toxic effects induced by Lamin B1 accumulation with differences between astrocytes and oligodendrocytes, highlighting that LMNB1 overexpression drastically affects astrocytic function reducing their fundamental support to oligodendrocytes in the myelination process. In addition, inflammation has also been investigated, showing an increased activation in ADLD patients' cells.
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Affiliation(s)
- Stefano Ratti
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Isabella Rusciano
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Sara Mongiorgi
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Eric Owusu Obeng
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Alessandra Cappellini
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Gabriella Teti
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Via Irnerio 48, Bologna, Italy
| | - Mirella Falconi
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Via Irnerio 48, Bologna, Italy
| | - Lia Talozzi
- Functional MR Unit, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Sabina Capellari
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC NeuroMet, Bologna, Italy
| | | | - Pietro Guaraldi
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC NeuroMet, Bologna, Italy
| | - Pietro Cortelli
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
- IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC NeuroMet, Bologna, Italy
| | - Pann-Ghill Suh
- Korea Brain Research Institute, Daegu, Republic of Korea
- School of Life Sciences, UNIST, Ulsan, Republic of Korea
| | - Lucio Cocco
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy.
| | - Lucia Manzoli
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy.
| | - Giulia Ramazzotti
- Cellular Signalling Laboratory, Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
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6
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Giorgio E, Pesce E, Pozzi E, Sondo E, Ferrero M, Morerio C, Borrelli G, Della Sala E, Lorenzati M, Cortelli P, Buffo A, Pedemonte N, Brusco A. A high-content drug screening strategy to identify protein level modulators for genetic diseases: A proof-of-principle in autosomal dominant leukodystrophy. Hum Mutat 2020; 42:102-116. [PMID: 33252173 DOI: 10.1002/humu.24147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/21/2020] [Revised: 10/09/2020] [Accepted: 11/24/2020] [Indexed: 11/07/2022]
Abstract
In genetic diseases, the most prevalent mechanism of pathogenicity is an altered expression of dosage-sensitive genes. Drugs that restore physiological levels of these genes should be effective in treating the associated conditions. We developed a screening strategy, based on a bicistronic dual-reporter vector, for identifying compounds that modulate protein levels, and used it in a pharmacological screening approach. To provide a proof-of-principle, we chose autosomal dominant leukodystrophy (ADLD), an ultra-rare adult-onset neurodegenerative disorder caused by lamin B1 (LMNB1) overexpression. We used a stable Chinese hamster ovary (CHO) cell line that simultaneously expresses an AcGFP reporter fused to LMNB1 and a Ds-Red normalizer. Using high-content imaging analysis, we screened a library of 717 biologically active compounds and approved drugs, and identified alvespimycin, an HSP90 inhibitor, as a positive hit. We confirmed that alvespimycin can reduce LMNB1 levels by 30%-80% in five different cell lines (fibroblasts, NIH3T3, CHO, COS-7, and rat primary glial cells). In ADLD fibroblasts, alvespimycin reduced cytoplasmic LMNB1 by about 50%. We propose this approach for effectively identifying potential drugs for treating genetic diseases associated with deletions/duplications and paving the way toward Phase II clinical trials.
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Affiliation(s)
- Elisa Giorgio
- Department of Medical Sciences, Medical Genetics Unit, University of Torino, Turin, Italy.,Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Emanuela Pesce
- UOC Genetica Medica, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Elisa Pozzi
- Department of Medical Sciences, Medical Genetics Unit, University of Torino, Turin, Italy
| | - Elvira Sondo
- UOC Genetica Medica, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Marta Ferrero
- Department of Medical Sciences, Medical Genetics Unit, University of Torino, Turin, Italy
| | - Cristina Morerio
- UOC Laboratorio di Genetica Umana, IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Giusy Borrelli
- Department of Medical Sciences, Medical Genetics Unit, University of Torino, Turin, Italy
| | - Edoardo Della Sala
- Department of Medical Sciences, Medical Genetics Unit, University of Torino, Turin, Italy
| | - Martina Lorenzati
- Department of Neuroscience Rita Levi Montalcini and Neuroscience Institute Cavalieri Ottolenghi, University of Torino, Orbassano, Torino, Italy
| | - Pietro Cortelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.,IRCCS Istituto delle Scienze Neurologiche di Bologna, Bellaria Hospital, Bologna, Italy
| | - Annalisa Buffo
- Department of Neuroscience Rita Levi Montalcini and Neuroscience Institute Cavalieri Ottolenghi, University of Torino, Orbassano, Torino, Italy
| | | | - Alfredo Brusco
- Department of Medical Sciences, Medical Genetics Unit, University of Torino, Turin, Italy.,Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Turin, Italy
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Giorgio E, Lorenzati M, Rivetti di Val Cervo P, Brussino A, Cernigoj M, Della Sala E, Bartoletti Stella A, Ferrero M, Caiazzo M, Capellari S, Cortelli P, Conti L, Cattaneo E, Buffo A, Brusco A. Allele-specific silencing as treatment for gene duplication disorders: proof-of-principle in autosomal dominant leukodystrophy. Brain 2019; 142:1905-1920. [PMID: 31143934 DOI: 10.1093/brain/awz139] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 01/16/2019] [Accepted: 03/31/2019] [Indexed: 11/14/2022] Open
Abstract
Allele-specific silencing by RNA interference (ASP-siRNA) holds promise as a therapeutic strategy for downregulating a single mutant allele with minimal suppression of the corresponding wild-type allele. This approach has been effectively used to target autosomal dominant mutations and single nucleotide polymorphisms linked with aberrantly expanded trinucleotide repeats. Here, we propose ASP-siRNA as a preferable choice to target duplicated disease genes, avoiding potentially harmful excessive downregulation. As a proof-of-concept, we studied autosomal dominant adult-onset demyelinating leukodystrophy (ADLD) due to lamin B1 (LMNB1) duplication, a hereditary, progressive and fatal disorder affecting myelin in the CNS. Using a reporter system, we screened the most efficient ASP-siRNAs preferentially targeting one of the alleles at rs1051644 (average minor allele frequency: 0.45) located in the 3' untranslated region of the gene. We identified four siRNAs with a high efficacy and allele-specificity, which were tested in ADLD patient-derived fibroblasts. Three of the small interfering RNAs were highly selective for the target allele and restored both LMNB1 mRNA and protein levels close to control levels. Furthermore, small interfering RNA treatment abrogates the ADLD-specific phenotypes in fibroblasts and in two disease-relevant cellular models: murine oligodendrocytes overexpressing human LMNB1, and neurons directly reprogrammed from patients' fibroblasts. In conclusion, we demonstrated that ASP-silencing by RNA interference is a suitable and promising therapeutic option for ADLD. Moreover, our results have a broad translational value extending to several pathological conditions linked to gene-gain in copy number variations.
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Affiliation(s)
- Elisa Giorgio
- University of Torino, Department of Medical Sciences, Torino, Italy
| | - Martina Lorenzati
- University of Torino, Department of Neuroscience Rita Levi Montalcini and Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano, Torino, Italy
| | - Pia Rivetti di Val Cervo
- University of Milan, Department of Biosciences, Laboratory of Stem Cell Biology and Pharmacology of Neurodegenerative Diseases, Milan, Italy
| | | | - Manuel Cernigoj
- University of Milan, Department of Biosciences, Laboratory of Stem Cell Biology and Pharmacology of Neurodegenerative Diseases, Milan, Italy
| | | | | | - Marta Ferrero
- University of Torino, Department of Medical Sciences, Torino, Italy
| | - Massimiliano Caiazzo
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, CG, Utrecht, The Netherlands
- Department of Molecular Medicine and Medical Biotechnology, University of Naples 'Federico II', Naples, Italy
| | - Sabina Capellari
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bellaria Hospital, Bologna, Italy
- University of Bologna, Department of Biomedical and Neuromotor Sciences, Bologna, Italy
| | - Pietro Cortelli
- IRCCS Istituto delle Scienze Neurologiche di Bologna, Bellaria Hospital, Bologna, Italy
- University of Bologna, Department of Biomedical and Neuromotor Sciences, Bologna, Italy
| | - Luciano Conti
- University of Trento, Centre for Integrative Biology (CIBIO), Laboratory of Computational Oncology, Trento, Italy
| | - Elena Cattaneo
- University of Milan, Department of Biosciences, Laboratory of Stem Cell Biology and Pharmacology of Neurodegenerative Diseases, Milan, Italy
- National Institute of Molecular Genetics (INGM) Romeo and Enrica Invernizzi, Milano, Italy
| | - Annalisa Buffo
- University of Torino, Department of Neuroscience Rita Levi Montalcini and Neuroscience Institute Cavalieri Ottolenghi (NICO), Orbassano, Torino, Italy
| | - Alfredo Brusco
- University of Torino, Department of Medical Sciences, Torino, Italy
- Città della Salute e della Scienza University Hospital, Medical Genetics Unit, Torino, Italy
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8
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Zanigni S, Terlizzi R, Tonon C, Testa C, Manners DN, Capellari S, Gallassi R, Poda R, Gramegna LL, Calandra-Buonaura G, Sambati L, Cortelli P, Lodi R. Brain magnetic resonance metabolic and microstructural changes in adult-onset autosomal dominant leukodystrophy. Brain Res Bull 2015; 117:24-31. [PMID: 26189928 DOI: 10.1016/j.brainresbull.2015.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 07/07/2015] [Indexed: 10/23/2022]
Abstract
INTRODUCTION adult-onset autosomal dominant leukodystrophy (ADLD) is a rare inherited disorder due to a duplication of lamin-B1 (LMNB1) gene. The aim of this study was to investigate brain metabolic and microstructural alterations by using advanced MR techniques. METHODS we performed brain MR scans including single-voxel proton-MR Spectroscopy ((1)H-MRS) of the lateral ventricles and parietal white matter and diffusion tensor imaging (DTI) in 4 subjects with LMNB1 gene duplication, 6 non-mutated relatives and 7 unrelated healthy controls. Cervical and thoracic spinal cord MR was performed in three symptomatic subjects with LMNB1 mutation. All participants underwent clinical and neuropsychological evaluation. RESULTS all subjects with LMNB1 gene duplication presented pathological accumulation of lactate in lateral ventricles CSF and no alterations of brain white matter absolute metabolites concentrations or metabolites/Cr ratios. We found increased white matter intra- and extracellular water transverse relaxation times. Tract-based spatial statistics analysis detected a significantly reduced fractional anisotropy in the genu of the corpus callosum in mutated cases compared to unrelated healthy controls and non-mutated relatives. Moreover, we detected different degrees of the typical white matter signal intensity alterations and brain and spinal atrophy at conventional MRI in symptomatic subjects with LMNB1 mutation. A mild impairment of executive functions was found in subjects with LMNB1 gene mutation. CONCLUSION in subjects with LMNB1 gene duplication, we found a pathological increase in CSF lactate, likely due to active demyelination along with glial activation, and microstructural changes in the genu of the corpus callosum possibly underpinning the mild neuropsychological deficits.
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Affiliation(s)
- Stefano Zanigni
- Functional MR Unit, Policlinico S. Orsola - Malpighi, Bologna, Italy; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Rossana Terlizzi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Caterina Tonon
- Functional MR Unit, Policlinico S. Orsola - Malpighi, Bologna, Italy; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
| | - Claudia Testa
- Functional MR Unit, Policlinico S. Orsola - Malpighi, Bologna, Italy; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - David Neil Manners
- Functional MR Unit, Policlinico S. Orsola - Malpighi, Bologna, Italy; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Sabina Capellari
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Roberto Gallassi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Roberto Poda
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Laura Ludovica Gramegna
- Functional MR Unit, Policlinico S. Orsola - Malpighi, Bologna, Italy; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Giovanna Calandra-Buonaura
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Luisa Sambati
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Pietro Cortelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy; IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | - Raffaele Lodi
- Functional MR Unit, Policlinico S. Orsola - Malpighi, Bologna, Italy; Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
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9
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Ferrera D, Canale C, Marotta R, Mazzaro N, Gritti M, Mazzanti M, Capellari S, Cortelli P, Gasparini L. Lamin B1 overexpression increases nuclear rigidity in autosomal dominant leukodystrophy fibroblasts. FASEB J 2014; 28:3906-18. [PMID: 24858279 PMCID: PMC4139899 DOI: 10.1096/fj.13-247635] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 05/12/2014] [Indexed: 12/22/2022]
Abstract
The architecture and structural mechanics of the cell nucleus are defined by the nuclear lamina, which is formed by A- and B-type lamins. Recently, gene duplication and protein overexpression of lamin B1 (LB1) have been reported in pedigrees with autosomal dominant leukodystrophy (ADLD). However, how the overexpression of LB1 affects nuclear mechanics and function and how it may result in pathology remain unexplored. Here, we report that in primary human skin fibroblasts derived from ADLD patients, LB1, but not other lamins, is overexpressed at the nuclear lamina and specifically enhances nuclear stiffness. Transient transfection of LB1 in HEK293 and neuronal N2a cells mimics the mechanical phenotype of ADLD nuclei. Notably, in ADLD fibroblasts, reducing LB1 protein levels by shRNA knockdown restores elasticity values to those indistinguishable from control fibroblasts. Moreover, isolated nuclei from ADLD fibroblasts display a reduced nuclear ion channel open probability on voltage-step application, suggesting that biophysical changes induced by LB1 overexpression may alter nuclear signaling cascades in somatic cells. Overall, the overexpression of LB1 in ADLD cells alters nuclear mechanics and is linked to changes in nuclear signaling, which could help explain the pathogenesis of this disease.
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Affiliation(s)
| | | | - Roberto Marotta
- Department of Nanochemistry, Istituto Italiano di Tecnologia, Genoa, Italy
| | | | - Marta Gritti
- Department of Biosciences, University of Milano, Milan, Italy
| | | | - Sabina Capellari
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Istituto delle Scienze Neurologiche di Bologna, Clinica Neurologica, Ospedale Bellaria, Bologna, Italy; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - Pietro Cortelli
- Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Istituto delle Scienze Neurologiche di Bologna, Clinica Neurologica, Ospedale Bellaria, Bologna, Italy; and Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
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10
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Giorgio E, Rolyan H, Kropp L, Chakka AB, Yatsenko S, Gregorio ED, Lacerenza D, Vaula G, Talarico F, Mandich P, Toro C, Pierre EE, Labauge P, Capellari S, Cortelli P, Vairo FP, Miguel D, Stubbolo D, Marques LC, Gahl W, Boespflug-Tanguy O, Melberg A, Hassin-Baer S, Cohen OS, Pjontek R, Grau A, Klopstock T, Fogel B, Meijer I, Rouleau G, Bouchard JPL, Ganapathiraju M, Vanderver A, Dahl N, Hobson G, Brusco A, Brussino A, Padiath QS. Analysis of LMNB1 duplications in autosomal dominant leukodystrophy provides insights into duplication mechanisms and allele-specific expression. Hum Mutat 2013; 34:1160-71. [PMID: 23649844 PMCID: PMC3714349 DOI: 10.1002/humu.22348] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 04/19/2013] [Indexed: 02/05/2023]
Abstract
Autosomal dominant leukodystrophy (ADLD) is an adult onset demyelinating disorder that is caused by duplications of the lamin B1 (LMNB1) gene. However, as only a few cases have been analyzed in detail, the mechanisms underlying LMNB1 duplications are unclear. We report the detailed molecular analysis of the largest collection of ADLD families studied, to date. We have identified the minimal duplicated region necessary for the disease, defined all the duplication junctions at the nucleotide level and identified the first inverted LMNB1 duplication. We have demonstrated that the duplications are not recurrent; patients with identical duplications share the same haplotype, likely inherited from a common founder and that the duplications originated from intrachromosomal events. The duplication junction sequences indicated that nonhomologous end joining or replication-based mechanisms such fork stalling and template switching or microhomology-mediated break induced repair are likely to be involved. LMNB1 expression was increased in patients' fibroblasts both at mRNA and protein levels and the three LMNB1 alleles in ADLD patients show equal expression, suggesting that regulatory regions are maintained within the rearranged segment. These results have allowed us to elucidate duplication mechanisms and provide insights into allele-specific LMNB1 expression levels.
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Affiliation(s)
- Elisa Giorgio
- University of Torino, Department of Medical SciencesTorino, Italy
| | - Harshvardhan Rolyan
- Department of Human Genetics Graduate School of Public Health, University of PittsburghPittsburgh, Pennsylvania
| | - Laura Kropp
- Department of Human Genetics Graduate School of Public Health, University of PittsburghPittsburgh, Pennsylvania
| | - Anish Baswanth Chakka
- Department of Biomedical Informatics School of Medicine, University of PittsburghPittsburgh, Pennsylvania
| | - Svetlana Yatsenko
- Department of Obstetrics Gynecology and Reproductive Sciences, University of PittsburghPittsburgh, Pennsylvania
- Department of Pathology University of Pittsburgh, School of MedicinePittsburgh, Pennsylvania
| | - Eleonora Di Gregorio
- University of Torino, Department of Medical SciencesTorino, Italy
- S.C.D.U. Medical Genetics, Az. Osp. Città della Salute e della ScienzaTorino, Italy
| | | | - Giovanna Vaula
- Department of Neuroscience, Az. Osp. Città della Salute e della ScienzaTorino, Italy
| | - Flavia Talarico
- S.C.D.U. Medical Genetics, Az. Osp. Città della Salute e della ScienzaTorino, Italy
| | - Paola Mandich
- Department of Neurology, Ophthalmology and Genetics, di Bologna, Department of Biomedical and NeuroMotor Sciences (DIBINEM) Alma Mater StudiorumBologna, Italy
| | - Camilo Toro
- NIH Undiagnosed Diseases Program NIH Office of Rare Disease, Research and NHGRIBethesda, Maryland
| | | | - Pierre Labauge
- Neurologie Hopital Caremeau, Centre Hospitalo-Universitaire de NimesNimes, France
| | - Sabina Capellari
- University of Bologna IRCCS Istituto delle Scienze Neurologiche di Bologna Department of Biomedical and NeuroMotor Sciences (DIBINEM), Alma Mater StudiorumItaly
| | - Pietro Cortelli
- University of Bologna IRCCS Istituto delle Scienze Neurologiche di Bologna Department of Biomedical and NeuroMotor Sciences (DIBINEM), Alma Mater StudiorumItaly
| | - Filippo Pinto Vairo
- Hospital de Clínicas de Porto Alegre … Universidade Federal do Rio Grande do SulPorto Alegre, Brazil
| | - Diego Miguel
- Hospital de Clínicas de Porto Alegre … Universidade Federal do Rio Grande do SulPorto Alegre, Brazil
| | - Danielle Stubbolo
- Nemours Biomedical Research, Alfred I. duPont Hospital for ChildrenWilmington, Delaware
| | - Lourenco Charles Marques
- Department of Medical Genetics Clinics Hospital of Ribeirao Preto, University of Sao PauloSao Paulo, Brazil
| | - William Gahl
- NIH Undiagnosed Diseases Program NIH Office of Rare Disease, Research and NHGRIBethesda, Maryland
| | - Odile Boespflug-Tanguy
- Institut National de la Santé et de la Recherche Médicale (INSERM) – Paris Diderot Sorbonne Paris Cité University, Robert Debré HospitalParis, France
- Assistance Publique des Hopitaux de Paris Reference Center for Rare Diseases “Leukodystrophies”, Child Neurology and Metabolic Disorders DepartmentParis, France
| | - Atle Melberg
- Department of Neuroscience Neurology, Uppsala UniversityUppsala, Sweden
| | - Sharon Hassin-Baer
- Parkinson’s disease and Movement Disorders Clinic Department of Neurology, Chaim Sheba Medical CenterTel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv UniversityTel Aviv, Israel
| | - Oren S Cohen
- Parkinson’s disease and Movement Disorders Clinic Department of Neurology, Chaim Sheba Medical CenterTel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv UniversityTel Aviv, Israel
| | - Rastislav Pjontek
- Department of Neurology, University of HeidelbergHeidelberg, Germany
| | - Armin Grau
- Dept. of Neurology, Klinikum LudwigshafenLudwigshafen, Germany
| | - Thomas Klopstock
- Dept. of Neurology Friedrich-Baur-Institute, Ludwig-Maximilians-UniversityMunich, Germany
- German Center for Vertigo and Balance DisordersMunich, Germany
- DZNE – German Center for Neurodegenerative DiseasesMunich, Germany
- German Network for Mitochondrial Disorders(mitoNET), Germany
| | - Brent Fogel
- Department of Neurology David Geffen School of Medicine, University of CaliforniaLos Angeles, California
| | - Inge Meijer
- Montreal Neurological Institute, McGill UniversityMontreal, Canada
| | - Guy Rouleau
- Montreal Neurological Institute, McGill UniversityMontreal, Canada
| | | | - Madhavi Ganapathiraju
- Department of Biomedical Informatics School of Medicine, University of PittsburghPittsburgh, Pennsylvania
| | - Adeline Vanderver
- Department of Neurology, Childrens National Medical CenterWashington, District of Columbia
| | - Niklas Dahl
- Dept. of Immunology Genetics and Pathology Section of Clinical Genetics The Rudbeck laboratory, Uppsala University Children’s HospitalUppsala, Sweden
| | - Grace Hobson
- Nemours Biomedical Research, Alfred I. duPont Hospital for ChildrenWilmington, Delaware
- University of Delaware, Department of BiologyNewark, Delaware
- Thomas Jefferson University, Jefferson Medical CollegePhiladelphia, Pennsylvania
| | - Alfredo Brusco
- University of Torino, Department of Medical SciencesTorino, Italy
- S.C.D.U. Medical Genetics, Az. Osp. Città della Salute e della ScienzaTorino, Italy
| | | | - Quasar Saleem Padiath
- Department of Human Genetics Graduate School of Public Health, University of PittsburghPittsburgh, Pennsylvania
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11
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Dreesen O, Ong PF, Chojnowski A, Colman A. The contrasting roles of lamin B1 in cellular aging and human disease. Nucleus 2013; 4:283-90. [PMID: 23873483 PMCID: PMC3810336 DOI: 10.4161/nucl.25808] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 07/16/2013] [Accepted: 07/18/2013] [Indexed: 12/17/2022] Open
Abstract
The nuclear lamina underlies the inner nuclear membrane and consists of a proteinaceous meshwork of intermediate filaments: the A- and B-type lamins. Mutations in LMNA (encoding lamin A and C) give rise to a variety of human diseases including muscular dystrophies, cardiomyopathies and the premature aging syndrome progeria (HGPS). Duplication of the LMNB1 locus, leading to elevated levels of lamin B1, causes adult-onset autosomal dominant leukodystrophy (ADLD), a rare genetic disease that leads to demyelination in the central nervous system (CNS). Conversely, reduced levels of lamin B1 have been observed in HGPS patient derived fibroblasts, as well as fibroblasts and keratinocytes undergoing replicative senescence, suggesting that the regulation of lamin B1 is important for cellular physiology and disease. However, the causal relationship between low levels of lamin B1 and cellular senescence and its relevance in vivo remain unclear. How do elevated levels of lamin B1 cause disease and why is the CNS particularly susceptible to lamin B1 fluctuations? Here we summarize recent findings as to how perturbations of lamin B1 affect cellular physiology and discuss the implications this has on senescence, HGPS and ADLD.
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Affiliation(s)
- Oliver Dreesen
- Stem Cell Disease Models; Institute of Medical Biology; Singapore, Singapore
| | - Peh Fern Ong
- Stem Cell Disease Models; Institute of Medical Biology; Singapore, Singapore
| | - Alexandre Chojnowski
- Developmental and Regenerative Biology; Institute of Medical Biology; Singapore, Singapore
| | - Alan Colman
- Stem Cell Disease Models; Institute of Medical Biology; Singapore, Singapore
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