1
|
Sukhareva KS, Smolina NA, Churkina AI, Kalugina KK, Zhuk SV, Khudiakov AA, Khodot AA, Faggian G, Luciani GB, Sejersen T, Kostareva AA. Desmin mutations impact the autophagy flux in C2C12 cell in mutation-specific manner. Cell Tissue Res 2023; 393:357-375. [PMID: 37277577 PMCID: PMC10406715 DOI: 10.1007/s00441-023-03790-6] [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: 09/13/2022] [Accepted: 05/12/2023] [Indexed: 06/07/2023]
Abstract
Desmin is the main intermediate filament of striated and smooth muscle cells and plays a crucial role in maintaining the stability of muscle fiber during contraction and relaxation cycles. Being a component of Z-disk area, desmin integrates autophagic pathways, and the disturbance of Z-disk proteins' structure negatively affects chaperone-assisted selective autophagy (CASA). In the present study, we focused on alteration of autophagy flux in myoblasts expressing various Des mutations. We applied Western blotting, immunocytochemistry, RNA sequencing, and shRNA approach to demonstrate that DesS12F, DesA357P, DesL345P, DesL370P, and DesD399Y mutations. Mutation-specific effect on autophagy flux being most severe in aggregate-prone Des mutations such as DesL345P, DesL370P, and DesD399Y. RNA sequencing data confirmed the most prominent effect of these mutations on expression profile and, in particular, on autophagy-related genes. To verify CASA contribution to desmin aggregate formation, we suppressed CASA by knocking down Bag3 and demonstrated that it promoted aggregate formation and lead to downregulation of Vdac2 and Vps4a and upregulation of Lamp, Pink1, and Prkn. In conclusion, Des mutations showed a mutation-specific effect on autophagy flux in C2C12 cells with either a predominant impact on autophagosome maturation or on degradation and recycling processes. Aggregate-prone desmin mutations lead to the activation of basal autophagy level while suppressing the CASA pathway by knocking down Bag3 can promote desmin aggregate formation.
Collapse
Affiliation(s)
- K S Sukhareva
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia.
- Graduate School of Life and Health Science, University of Verona, Verona, Italy.
| | - N A Smolina
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - A I Churkina
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - K K Kalugina
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - S V Zhuk
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - A A Khudiakov
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - A A Khodot
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia
| | - G Faggian
- Graduate School of Life and Health Science, University of Verona, Verona, Italy
| | - G B Luciani
- Graduate School of Life and Health Science, University of Verona, Verona, Italy
| | - T Sejersen
- Department of Women's and Children's Health, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
- Department of Neuropaediatrics, Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - A A Kostareva
- Institute of Molecular Biology and Genetics, Almazov National Medical Research Centre, Saint-Petersburg, Russia
- Department of Women's and Children's Health, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| |
Collapse
|
2
|
Khatun N, Zaveri S, Salciccioli L, John S. A Rare Case of Coexisting Mutation in Desmin and Thioredoxin Reductase 2 Genes Causing Dilated Cardiomyopathy. Cureus 2023; 15:e40560. [PMID: 37465804 PMCID: PMC10351334 DOI: 10.7759/cureus.40560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2023] [Indexed: 07/20/2023] Open
Abstract
Desmin (DES) maintains the overall structure of cardiomyocytes and cytoskeletal organization within striated muscle cells. Mitochondrial thioredoxin reductase 2 (TXNRD-2) is essential for mitochondrial oxygen radical scavenging. We describe a rare case of dilated cardiomyopathy (DCM) in an 18-year-old female with a heterozygous mutation involving both DES and TXNRD-2 genes.
Collapse
Affiliation(s)
- Nazima Khatun
- Internal Medicine, State University of New York Downstate Medical Center, Brooklyn, USA
| | - Sahil Zaveri
- Internal Medicine, State University of New York Downstate Medical Center, Brooklyn, USA
| | - Louis Salciccioli
- Cardiovascular Disease, State University of New York Downstate Medical Center, Brooklyn, USA
| | - Sabu John
- Cardiology, Kings County Hospital Center, Brooklyn, USA
| |
Collapse
|
3
|
Lau C, Gul U, Liu B, Captur G, Hothi SS. Cardiovascular Magnetic Resonance Imaging in Familial Dilated Cardiomyopathy. Medicina (B Aires) 2023; 59:medicina59030439. [PMID: 36984439 PMCID: PMC10057087 DOI: 10.3390/medicina59030439] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/02/2023] [Accepted: 02/07/2023] [Indexed: 02/25/2023] Open
Abstract
Dilated cardiomyopathy (DCM) is a common cause of non-ischaemic heart failure, conferring high morbidity and mortality, including sudden cardiac death due to systolic dysfunction or arrhythmic sudden death. Within the DCM cohort exists a group of patients with familial disease. In this article we review the pathophysiology and cardiac imaging findings of familial DCM, with specific attention to known disease subtypes. The role of advanced cardiac imaging cardiovascular magnetic resonance is still accumulating, and there remains much to be elucidated. We discuss its potential clinical roles as currently known, with respect to diagnostic utility and risk stratification. Advances in such risk stratification may help target pharmacological and device therapies to those at highest risk.
Collapse
Affiliation(s)
- Clement Lau
- New Cross Hospital, Royal Wolverhampton NHS Trust, Wolverhampton WV10 0QP, UK
| | - Uzma Gul
- New Cross Hospital, Royal Wolverhampton NHS Trust, Wolverhampton WV10 0QP, UK
| | - Boyang Liu
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Gabriella Captur
- MRC Unit for Lifelong Health and Ageing at UCL, University College London, London WC1E 6BT, UK
- Institute of Cardiovascular Science, University College London, London WC1E 6BT, UK
- Centre for Inherited Heart Muscle Conditions, Cardiology Department, The Royal Free Hospital, London NW3 2QG, UK
| | - Sandeep S. Hothi
- New Cross Hospital, Royal Wolverhampton NHS Trust, Wolverhampton WV10 0QP, UK
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
- Correspondence:
| |
Collapse
|
4
|
Kuntawala DH, Martins F, Vitorino R, Rebelo S. Automatic Text-Mining Approach to Identify Molecular Target Candidates Associated with Metabolic Processes for Myotonic Dystrophy Type 1. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:2283. [PMID: 36767649 PMCID: PMC9915907 DOI: 10.3390/ijerph20032283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/20/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Myotonic dystrophy type 1 (DM1) is an autosomal dominant hereditary disease caused by abnormal expansion of unstable CTG repeats in the 3' untranslated region of the myotonic dystrophy protein kinase (DMPK) gene. This disease mainly affects skeletal muscle, resulting in myotonia, progressive distal muscle weakness, and atrophy, but also affects other tissues and systems, such as the heart and central nervous system. Despite some studies reporting therapeutic strategies for DM1, many issues remain unsolved, such as the contribution of metabolic and mitochondrial dysfunctions to DM1 pathogenesis. Therefore, it is crucial to identify molecular target candidates associated with metabolic processes for DM1. In this study, resorting to a bibliometric analysis, articles combining DM1, and metabolic/metabolism terms were identified and further analyzed using an unbiased strategy of automatic text mining with VOSviewer software. A list of candidate molecular targets for DM1 associated with metabolic/metabolism was generated and compared with genes previously associated with DM1 in the DisGeNET database. Furthermore, g:Profiler was used to perform a functional enrichment analysis using the Gene Ontology (GO) and REAC databases. Enriched signaling pathways were identified using integrated bioinformatics enrichment analyses. The results revealed that only 15 of the genes identified in the bibliometric analysis were previously associated with DM1 in the DisGeNET database. Of note, we identified 71 genes not previously associated with DM1, which are of particular interest and should be further explored. The functional enrichment analysis of these genes revealed that regulation of cellular metabolic and metabolic processes were the most associated biological processes. Additionally, a number of signaling pathways were found to be enriched, e.g., signaling by receptor tyrosine kinases, signaling by NRTK1 (TRKA), TRKA activation by NGF, PI3K-AKT activation, prolonged ERK activation events, and axon guidance. Overall, several valuable target candidates related to metabolic processes for DM1 were identified, such as NGF, NTRK1, RhoA, ROCK1, ROCK2, DAG, ACTA, ID1, ID2 MYOD, and MYOG. Therefore, our study strengthens the hypothesis that metabolic dysfunctions contribute to DM1 pathogenesis, and the exploitation of metabolic dysfunction targets is crucial for the development of future therapeutic interventions for DM1.
Collapse
|
5
|
The N-Terminal Part of the 1A Domain of Desmin Is a Hot Spot Region for Putative Pathogenic DES Mutations Affecting Filament Assembly. Cells 2022; 11:cells11233906. [PMID: 36497166 PMCID: PMC9738904 DOI: 10.3390/cells11233906] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 11/29/2022] [Indexed: 12/09/2022] Open
Abstract
Desmin is the major intermediate filament protein of all three muscle cell types, and connects different cell organelles and multi-protein complexes such as the cardiac desmosomes. Several pathogenic mutations in the DES gene cause different skeletal and cardiac myopathies. However, the significance of the majority of DES missense variants is currently unknown, since functional data are lacking. To determine whether desmin missense mutations within the highly conserved 1A coil domain cause a filament assembly defect, we generated a set of variants with unknown significance and systematically analyzed the filament assembly using confocal microscopy in transfected SW-13, H9c2 cells and cardiomyocytes derived from induced pluripotent stem cells. We found that mutations in the N-terminal part of the 1A coil domain affect filament assembly, leading to cytoplasmic desmin aggregation. In contrast, mutant desmin in the C-terminal part of the 1A coil domain forms filamentous structures comparable to wild-type desmin. Our findings suggest that the N-terminal part of the 1A coil domain is a hot spot for pathogenic desmin mutations, which affect desmin filament assembly. This study may have relevance for the genetic counselling of patients carrying variants in the 1A coil domain of the DES gene.
Collapse
|
6
|
Calcagno DM, Taghdiri N, Ninh VK, Mesfin JM, Toomu A, Sehgal R, Lee J, Liang Y, Duran JM, Adler E, Christman KL, Zhang K, Sheikh F, Fu Z, King KR. Single-cell and spatial transcriptomics of the infarcted heart define the dynamic onset of the border zone in response to mechanical destabilization. NATURE CARDIOVASCULAR RESEARCH 2022; 1:1039-1055. [PMID: 39086770 PMCID: PMC11290420 DOI: 10.1038/s44161-022-00160-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 10/03/2022] [Indexed: 08/02/2024]
Abstract
The border zone (BZ) of the infarcted heart is a geographically complex and biologically enigmatic interface separating poorly perfused infarct zones (IZs) from remote zones (RZs). The cellular and molecular mechanisms of myocardial BZs are not well understood because microdissection inevitably combines them with uncontrolled amounts of RZs and IZs. Here, we use single-cell/nucleus RNA sequencing, spatial transcriptomics and multiplexed RNA fluorescence in situ hybridization to redefine the BZ based on cardiomyocyte transcriptomes. BZ1 (Nppa + Xirp2 -) forms a hundreds-of-micrometer-thick layer of morphologically intact cells adjacent to RZs that are detectable within an hour of injury. Meanwhile, BZ2 (Nppa + Xirp2 +) forms a near-single-cell-thick layer of morphologically distorted cardiomyocytes at the IZ edge that colocalize with matricellular protein-expressing myofibroblasts and express predominantly mechanotransduction genes. Surprisingly, mechanical injury alone is sufficient to induce BZ genes. We propose a 'loss of neighbor' hypothesis to explain how ischemic cell death mechanically destabilizes the BZ to induce its transcriptional response.
Collapse
Affiliation(s)
- D. M. Calcagno
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
- These authors contributed equally: D.M. Calcagno, N. Taghdiri
| | - N. Taghdiri
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
- These authors contributed equally: D.M. Calcagno, N. Taghdiri
| | - V. K. Ninh
- Division of Cardiology and Cardiovascular Institute, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - J. M. Mesfin
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - A. Toomu
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
| | - R. Sehgal
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
| | - J. Lee
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
| | - Y. Liang
- Division of Cardiology and Cardiovascular Institute, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - J. M. Duran
- Division of Cardiology and Cardiovascular Institute, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - E. Adler
- Division of Cardiology and Cardiovascular Institute, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - K. L. Christman
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
- Sanford Consortium for Regenerative Medicine, La Jolla, CA, USA
| | - K. Zhang
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
| | - F. Sheikh
- Division of Cardiology and Cardiovascular Institute, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| | - Z. Fu
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
| | - K. R. King
- Department of Bioengineering, Jacobs School of Engineering, University of California San Diego, La Jolla, CA, USA
- Division of Cardiology and Cardiovascular Institute, Department of Medicine, University of California San Diego, La Jolla, CA, USA
| |
Collapse
|
7
|
Coscarella IL, Landim-Vieira M, Pinto JR, Chelko SP. Arrhythmogenic Cardiomyopathy: Exercise Pitfalls, Role of Connexin-43, and Moving beyond Antiarrhythmics. Int J Mol Sci 2022; 23:ijms23158753. [PMID: 35955883 PMCID: PMC9369094 DOI: 10.3390/ijms23158753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/28/2022] [Accepted: 08/03/2022] [Indexed: 12/11/2022] Open
Abstract
Arrhythmogenic Cardiomyopathy (ACM), a Mendelian disorder that can affect both left and right ventricles, is most often associated with pathogenic desmosomal variants that can lead to fibrofatty replacement of the myocardium, a pathological hallmark of this disease. Current therapies are aimed to prevent the worsening of disease phenotypes and sudden cardiac death (SCD). Despite the use of implantable cardioverter defibrillators (ICDs) there is no present therapy that would mitigate the loss in electrical signal and propagation by these fibrofatty barriers. Recent studies have shown the influence of forced vs. voluntary exercise in a variety of healthy and diseased mice; more specifically, that exercised mice show increased Connexin-43 (Cx43) expression levels. Fascinatingly, increased Cx43 expression ameliorated the abnormal electrical signal conduction in the myocardium of diseased mice. These findings point to a major translational pitfall in current therapeutics for ACM patients, who are advised to completely cease exercising and already demonstrate reduced Cx43 levels at the myocyte intercalated disc. Considering cardiac dysfunction in ACM arises from the loss of cardiomyocytes and electrical signal conduction abnormalities, an increase in Cx43 expression-promoted by low to moderate intensity exercise and/or gene therapy-could very well improve cardiac function in ACM patients.
Collapse
Affiliation(s)
- Isabella Leite Coscarella
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32303, USA
| | - Maicon Landim-Vieira
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32303, USA
| | - José Renato Pinto
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32303, USA
| | - Stephen P. Chelko
- Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32303, USA
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21215, USA
- Correspondence: ; Tel.: +1-850-644-2215
| |
Collapse
|
8
|
Spectrum of Rare and Common Genetic Variants in Arrhythmogenic Cardiomyopathy Patients. Biomolecules 2022; 12:biom12081043. [PMID: 36008935 PMCID: PMC9405889 DOI: 10.3390/biom12081043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/18/2022] [Accepted: 07/25/2022] [Indexed: 01/25/2023] Open
Abstract
Arrhythmogenic cardiomyopathy (ACM) is a rare inherited disorder, whose genetic cause is elusive in about 50–70% of cases. ACM presents a variable disease course which could be influenced by genetics. We performed next-generation sequencing on a panel of 174 genes associated with inherited cardiovascular diseases on 82 ACM probands (i) to describe and classify the pathogenicity of rare variants according to the American College of Medical Genetics and Genomics both for ACM-associated genes and for genes linked to other cardiovascular genetic conditions; (ii) to assess, for the first time, the impact of common variants on the ACM clinical disease severity by genotype-phenotype correlation and survival analysis. We identified 15 (likely) pathogenic variants and 66 variants of uncertain significance in ACM-genes and 4 high-impact variants in genes never associated with ACM (ABCC9, APOB, DPP6, MIB1), which deserve future consideration. In addition, we found 69 significant genotype-phenotype associations between common variants and clinical parameters. Arrhythmia-associated polymorphisms resulted in an increased risk of arrhythmic events during patients’ follow-up. The description of the genetic framework of our population and the observed genotype-phenotype correlation constitutes the starting point to address the current lack of knowledge in the genetics of ACM.
Collapse
|
9
|
Dilated-Left Ventricular Non-Compaction Cardiomyopathy in a Pediatric Case with SPEG Compound Heterozygous Variants. Int J Mol Sci 2022; 23:ijms23095205. [PMID: 35563595 PMCID: PMC9102709 DOI: 10.3390/ijms23095205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 04/29/2022] [Accepted: 05/04/2022] [Indexed: 02/01/2023] Open
Abstract
Left Ventricular Non-Compaction (LVNC) is defined by the triad prominent myocardial trabecular meshwork, thin compacted layer, and deep intertrabecular recesses. LVNC associated with dilation is characterized by the coexistence of left ventricular dilation and systolic dysfunction. Pediatric cases with dilated-LVNC have worse outcomes than those with isolated dilated cardiomyopathy and adult patients. Herein, we report a clinical and genetic investigation using trio-based whole-exome sequencing of a pediatric case with early-onset dilated-LVNC. Compound heterozygous mutations were identified in the Striated Muscle Enriched Protein Kinase (SPEG) gene, a key regulator of cardiac calcium homeostasis. A paternally inherited mutation: SPEG; p.(Arg2470Ser) and the second variant, SPEG; p.(Pro2687Thr), is common and occurred de novo. Subsequently, Sanger sequencing was performed for the family in order to segregate the variants. Thus, the index case, his father, and both sisters carried the SPEG: p.(Arg2470Ser) variant. Only the index patient carried both SPEG variants. Both sisters, as well as the patient’s father, showed LVNC without cardiac dysfunction. The unaffected mother did not harbor any of the variants. The in silico analysis of the identified variants (rare and common) showed a decrease in protein stability with alterations of the physical properties as well as high conservation scores for the mutated residues. Interestingly, using the Project HOPE tool, the SPEG; p.(Pro2687Thr) variant is predicted to disturb the second fibronectin type III domain of the protein and may abolish its function. To our knowledge, the present case is the first description of compound heterozygous SPEG mutations involving a de novo variant and causing dilated-LVNC without neuropathy or centronuclear myopathy.
Collapse
|