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Rzepnikowska W, Kaminska J, Kochański A. The molecular mechanisms that underlie IGHMBP2-related diseases. Neuropathol Appl Neurobiol 2024; 50:e13005. [PMID: 39119929 DOI: 10.1111/nan.13005] [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: 01/31/2024] [Revised: 07/18/2024] [Accepted: 07/20/2024] [Indexed: 08/10/2024]
Abstract
Immunoglobulin Mu-binding protein 2 (IGHMBP2) pathogenic variants result in the fatal, neurodegenerative disease spinal muscular atrophy with respiratory distress type 1 (SMARD1) and the milder, Charcot-Marie-Tooth (CMT) type 2S (CMT2S) neuropathy. More than 20 years after the link between IGHMBP2 and SMARD1 was revealed, and 10 years after the discovery of the association between IGHMBP2 and CMT2S, the pathogenic mechanism of these diseases is still not well defined. The discovery that IGHMBP2 functions as an RNA/DNA helicase was an important step, but it did not reveal the pathogenic mechanism. Helicases are enzymes that use ATP hydrolysis to catalyse the separation of nucleic acid strands. They are involved in numerous cellular processes, including DNA repair and transcription; RNA splicing, transport, editing and degradation; ribosome biogenesis; translation; telomere maintenance; and homologous recombination. IGHMBP2 appears to be a multifunctional factor involved in several cellular processes that regulate gene expression. It is difficult to determine which processes, when dysregulated, lead to pathology. Here, we summarise our current knowledge of the clinical presentation of IGHMBP2-related diseases. We also overview the available models, including yeast, mice and cells, which are used to study the function of IGHMBP2 and the pathogenesis of the related diseases. Further, we discuss the structure of the IGHMBP2 protein and its postulated roles in cellular functioning. Finally, we present potential anomalies that may result in the neurodegeneration observed in IGHMBP2-related disease and highlight the most prominent ones.
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Affiliation(s)
- Weronika Rzepnikowska
- Neuromuscular Unit, Mossakowski Medical Research Institute Polish Academy of Sciences, Warsaw, 02-106, Poland
| | - Joanna Kaminska
- Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, 02-106, Poland
| | - Andrzej Kochański
- Neuromuscular Unit, Mossakowski Medical Research Institute Polish Academy of Sciences, Warsaw, 02-106, Poland
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Sperelakis-Beedham B, Ruaud L, Vial Y, Rachid M, Ageorges F, Goujon L, Verloes A, Tabet AC, Bourrat E, Lévy J. Expanding the phenotype of GTF2E2-associated trichothiodystrophy. J Eur Acad Dermatol Venereol 2024; 38:e222-e226. [PMID: 37793898 DOI: 10.1111/jdv.19545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 09/26/2023] [Indexed: 10/06/2023]
Affiliation(s)
- Brian Sperelakis-Beedham
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
- Plateforme SeqOIA, AP-HP, Paris, France
| | - Lyse Ruaud
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
| | - Yoann Vial
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
| | - Myriam Rachid
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
- Neuroscience Department, Human Genetics and Cognitive Function Unit, Pasteur Institute, Paris, France
| | - Faustine Ageorges
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
| | - Louise Goujon
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
| | - Alain Verloes
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
| | - Anne-Claude Tabet
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
- Plateforme SeqOIA, AP-HP, Paris, France
- Neuroscience Department, Human Genetics and Cognitive Function Unit, Pasteur Institute, Paris, France
| | | | - Jonathan Lévy
- Genetics Department, APHP, Robert-Debré University Hospital, Paris, France
- Plateforme SeqOIA, AP-HP, Paris, France
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Zhu G, Khalid F, Zhang D, Cao Z, Maity P, Kestler HA, Orioli D, Scharffetter-Kochanek K, Iben S. Ribosomal Dysfunction Is a Common Pathomechanism in Different Forms of Trichothiodystrophy. Cells 2023; 12:1877. [PMID: 37508541 PMCID: PMC10377840 DOI: 10.3390/cells12141877] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 06/07/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Mutations in a broad variety of genes can provoke the severe childhood disorder trichothiodystrophy (TTD) that is classified as a DNA repair disease or a transcription syndrome of RNA polymerase II. In an attempt to identify the common underlying pathomechanism of TTD we performed a knockout/knockdown of the two unrelated TTD factors TTDN1 and RNF113A and investigated the consequences on ribosomal biogenesis and performance. Interestingly, interference with these TTD factors created a nearly uniform impact on RNA polymerase I transcription with downregulation of UBF, disturbed rRNA processing and reduction of the backbone of the small ribosomal subunit rRNA 18S. This was accompanied by a reduced quality of decoding in protein translation and the accumulation of misfolded and carbonylated proteins, indicating a loss of protein homeostasis (proteostasis). As the loss of proteostasis by the ribosome has been identified in the other forms of TTD, here we postulate that ribosomal dysfunction is a common underlying pathomechanism of TTD.
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Affiliation(s)
- Gaojie Zhu
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
| | - Fatima Khalid
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
| | - Danhui Zhang
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
| | - Zhouli Cao
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
| | - Pallab Maity
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
| | - Hans A Kestler
- Medical Systems Biology, Ulm University, 89081 Ulm, Germany
| | - Donata Orioli
- Istituto di Genetica Molecolare L.L. Cavalli-Sforza CNR, 27100 Pavia, Italy
| | | | - Sebastian Iben
- Department of Dermatology and Allergic Diseases, Ulm University, 89081 Ulm, Germany
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Toga K, Bono H. Meta-Analysis of Public RNA Sequencing Data Revealed Potential Key Genes Associated with Reproductive Division of Labor in Social Hymenoptera and Termites. Int J Mol Sci 2023; 24:ijms24098353. [PMID: 37176060 PMCID: PMC10179490 DOI: 10.3390/ijms24098353] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Eusociality in insects has evolved independently many times. One of the most notable characteristics of eusociality is the reproductive division of labor. In social insects, the reproductive division of labor is accomplished by queens and workers. Transcriptome analyses of queens and workers have been conducted for various eusocial species. However, the genes that regulate the reproductive division of labor across all or multiple eusocial species have not yet been fully elucidated. Therefore, we conducted a meta-analysis using publicly available RNA-sequencing data from four major groups of social insects. In this meta-analysis, we collected 258 pairs (queen vs. worker) of RNA-sequencing data from 34 eusocial species. The meta-analysis identified a total of 20 genes that were differentially expressed in queens or workers. Out of these, 12 genes have not previously been reported to be involved in the reproductive division of labor. Functional annotation of these 20 genes in other organisms revealed that they could be regulators of behaviors and physiological states related to the reproductive division of labor. These 20 genes, revealed using massive datasets of numerous eusocial insects, may be key regulators of the reproductive division of labor.
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Affiliation(s)
- Kouhei Toga
- Laboratory of BioDX, PtBio Co-Creation Research Center, Genome Editing Innovation Center, Hiroshima University, 3-10-23 Kagamiyama, Higashi-Hiroshima City 739-0046, Hiroshima, Japan
- Laboratory of Genome Informatics, Graduate School of Integrated Sciences for Life, Hiroshima University, 3-10-23 Kagamiyama, Higashi-Hiroshima City 739-0046, Hiroshima, Japan
| | - Hidemasa Bono
- Laboratory of BioDX, PtBio Co-Creation Research Center, Genome Editing Innovation Center, Hiroshima University, 3-10-23 Kagamiyama, Higashi-Hiroshima City 739-0046, Hiroshima, Japan
- Laboratory of Genome Informatics, Graduate School of Integrated Sciences for Life, Hiroshima University, 3-10-23 Kagamiyama, Higashi-Hiroshima City 739-0046, Hiroshima, Japan
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Khalid F, Phan T, Qiang M, Maity P, Lasser T, Wiese S, Penzo M, Alupei M, Orioli D, Scharffetter-Kochanek K, Iben S. TFIIH mutations can impact on translational fidelity of the ribosome. Hum Mol Genet 2023; 32:1102-1113. [PMID: 36308430 PMCID: PMC10026254 DOI: 10.1093/hmg/ddac268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/11/2022] [Accepted: 10/25/2022] [Indexed: 11/14/2022] Open
Abstract
TFIIH is a complex essential for transcription of protein-coding genes by RNA polymerase II, DNA repair of UV-lesions and transcription of rRNA by RNA polymerase I. Mutations in TFIIH cause the cancer prone DNA-repair disorder xeroderma pigmentosum (XP) and the developmental and premature aging disorders trichothiodystrophy (TTD) and Cockayne syndrome. A total of 50% of the TTD cases are caused by TFIIH mutations. Using TFIIH mutant patient cells from TTD and XP subjects we can show that the stress-sensitivity of the proteome is reduced in TTD, but not in XP. Using three different methods to investigate the accuracy of protein synthesis by the ribosome, we demonstrate that translational fidelity of the ribosomes of TTD, but not XP cells, is decreased. The process of ribosomal synthesis and maturation is affected in TTD cells and can lead to instable ribosomes. Isolated ribosomes from TTD patients show an elevated error rate when challenged with oxidized mRNA, explaining the oxidative hypersensitivity of TTD cells. Treatment of TTD cells with N-acetyl cysteine normalized the increased translational error-rate and restored translational fidelity. Here we describe a pathomechanism that might be relevant for our understanding of impaired development and aging-associated neurodegeneration.
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Affiliation(s)
- Fatima Khalid
- Department of Dermatology and Allergic Diseases, Ulm University Medical Center, 89081 Ulm, Germany
| | - Tamara Phan
- Department of Dermatology and Allergic Diseases, Ulm University Medical Center, 89081 Ulm, Germany
| | - Mingyue Qiang
- Department of Dermatology and Allergic Diseases, Ulm University Medical Center, 89081 Ulm, Germany
| | - Pallab Maity
- Department of Dermatology and Allergic Diseases, Ulm University Medical Center, 89081 Ulm, Germany
| | - Theresa Lasser
- Department of Dermatology and Allergic Diseases, Ulm University Medical Center, 89081 Ulm, Germany
| | - Sebastian Wiese
- Core Unit of Mass Spectrometry and Proteomics, Ulm University Medical Center, 89081 Ulm, Germany
| | - Marianna Penzo
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, 40138 Bologna, Italy
| | - Marius Alupei
- Department of Dermatology and Allergic Diseases, Ulm University Medical Center, 89081 Ulm, Germany
| | - Donata Orioli
- Institute of Molecular Genetics, Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy
| | | | - Sebastian Iben
- Department of Dermatology and Allergic Diseases, Ulm University Medical Center, 89081 Ulm, Germany
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Ercc2/Xpd deficiency results in failure of digestive organ growth in zebrafish with elevated nucleolar stress. iScience 2022; 25:104957. [PMID: 36065184 PMCID: PMC9440294 DOI: 10.1016/j.isci.2022.104957] [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: 01/31/2022] [Revised: 05/23/2022] [Accepted: 08/12/2022] [Indexed: 12/09/2022] Open
Abstract
Mutations in ERCC2/XPD helicase, an important component of the TFIIH complex, cause distinct human genetic disorders which exhibit various pathological features. However, the molecular mechanisms underlying many symptoms remain elusive. Here, we have shown that Ercc2/Xpd deficiency in zebrafish resulted in hypoplastic digestive organs with normal bud initiation but later failed to grow. The proliferation of intestinal endothelial cells was impaired in ercc2/xpd mutants, and mitochondrial abnormalities, autophagy, and inflammation were highly induced. Further studies revealed that these abnormalities were associated with the perturbation of rRNA synthesis and nucleolar stress in a p53-independent manner. As TFIIH has only been implicated in RNA polymerase I-dependent transcription in vitro, our results provide the first evidence for the connection between Ercc2/Xpd and rRNA synthesis in an animal model that recapitulates certain key characteristics of ERCC2/XPD-related human genetic disorders, and will greatly advance our understanding of the molecular pathogenesis of these diseases. Ercc2/Xpd deficiency results in failure of digestive organ growth in zebrafish Ercc2/Xpd-deficient intestinal endothelial cells exhibit impaired proliferation Mitochondrial abnormalities, autophagy, and inflammation are highly induced rRNA synthesis perturbation leads to nucleolar stress in a p53-independent manner
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Maity P, Iben S. Collisions and protein aggregations ahead: how aging affects ribosomal elongation dynamics. Signal Transduct Target Ther 2022; 7:133. [PMID: 35461313 PMCID: PMC9035160 DOI: 10.1038/s41392-022-01001-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/28/2022] [Accepted: 04/10/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Pallab Maity
- Department of Dermatology and Allergic Diseases, Ulm University, Ulm, Germany
| | - Sebastian Iben
- Department of Dermatology and Allergic Diseases, Ulm University, Ulm, Germany.
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