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Jacques F, Tichopád T, Demko M, Bystrý V, Křížová KC, Seifertová M, Voříšková K, Fuad MMH, Vetešník L, Šimková A. Reproduction-associated pathways in females of gibel carp (Carassius gibelio) shed light on the molecular mechanisms of the coexistence of asexual and sexual reproduction. BMC Genomics 2024; 25:548. [PMID: 38824502 PMCID: PMC11144346 DOI: 10.1186/s12864-024-10462-4] [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: 01/29/2024] [Accepted: 05/28/2024] [Indexed: 06/03/2024] Open
Abstract
Gibel carp (Carassius gibelio) is a cyprinid fish that originated in eastern Eurasia and is considered as invasive in European freshwater ecosystems. The populations of gibel carp in Europe are mostly composed of asexually reproducing triploid females (i.e., reproducing by gynogenesis) and sexually reproducing diploid females and males. Although some cases of coexisting sexual and asexual reproductive forms are known in vertebrates, the molecular mechanisms maintaining such coexistence are still in question. Both reproduction modes are supposed to exhibit evolutionary and ecological advantages and disadvantages. To better understand the coexistence of these two reproduction strategies, we performed transcriptome profile analysis of gonad tissues (ovaries) and studied the differentially expressed reproduction-associated genes in sexual and asexual females. We used high-throughput RNA sequencing to generate transcriptomic profiles of gonadal tissues of triploid asexual females and males, diploid sexual males and females of gibel carp, as well as diploid individuals from two closely-related species, C. auratus and Cyprinus carpio. Using SNP clustering, we showed the close similarity of C. gibelio and C. auratus with a basal position of C. carpio to both Carassius species. Using transcriptome profile analyses, we showed that many genes and pathways are involved in both gynogenetic and sexual reproduction in C. gibelio; however, we also found that 1500 genes, including 100 genes involved in cell cycle control, meiosis, oogenesis, embryogenesis, fertilization, steroid hormone signaling, and biosynthesis were differently expressed in the ovaries of asexual and sexual females. We suggest that the overall downregulation of reproduction-associated pathways in asexual females, and their maintenance in sexual ones, allows the populations of C. gibelio to combine the evolutionary and ecological advantages of the two reproductive strategies. However, we showed that many sexual-reproduction-related genes are maintained and expressed in asexual females, suggesting that gynogenetic gibel carp retains the genetic toolkits for meiosis and sexual reproduction. These findings shed new light on the evolution of this asexual and sexual complex.
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Affiliation(s)
- Florian Jacques
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic.
| | - Tomáš Tichopád
- Laboratory of Non-Mendelian Evolution, Institute of Animal Physiology and Genetics of the CAS, Liběchov, 277 21, Czech Republic
- Faculty of Fisheries and Protection of Waters, University of South Bohemia in České Budějovice, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zátiší 728/II, Vodňany, 389 25, Czech Republic
| | - Martin Demko
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
- Central European Institute of Technology, Masaryk University, Brno, 625 00, Czech Republic
| | - Vojtěch Bystrý
- Central European Institute of Technology, Masaryk University, Brno, 625 00, Czech Republic
| | - Kristína Civáňová Křížová
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - Mária Seifertová
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - Kristýna Voříšková
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - Md Mehedi Hasan Fuad
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
| | - Lukáš Vetešník
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
- Institute of Vertebrate Biology, Czech Academy of Science, Květná 8, Brno, 603 65, Czech Republic
| | - Andrea Šimková
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 611 37, Czech Republic
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Gan P, Wang Z, Bezprozvannaya S, McAnally JR, Tan W, Li H, Bassel-Duby R, Liu N, Olson EN. RBPMS regulates cardiomyocyte contraction and cardiac function through RNA alternative splicing. Cardiovasc Res 2024; 120:56-68. [PMID: 37890031 PMCID: PMC10898938 DOI: 10.1093/cvr/cvad166] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/20/2023] [Accepted: 09/23/2023] [Indexed: 10/29/2023] Open
Abstract
AIMS RNA binding proteins play essential roles in mediating RNA splicing and are key post-transcriptional regulators in the heart. Our recent study demonstrated that RBPMS (RNA binding protein with multiple splicing) is crucial for cardiac development through modulating mRNA splicing, but little is known about its functions in the adult heart. In this study, we aim to characterize the post-natal cardiac function of Rbpms and its mechanism of action. METHODS AND RESULTS We generated a cardiac-specific knockout mouse line and found that cardiac-specific loss of Rbpms caused severe cardiomyocyte contractile defects, leading to dilated cardiomyopathy and early lethality in adult mice. We showed by proximity-dependent biotin identification assay and mass spectrometry that RBPMS associates with spliceosome factors and other RNA binding proteins, such as RBM20, that are important in cardiac function. We performed paired-end RNA sequencing and RT-PCR and found that RBPMS regulates mRNA alternative splicing of genes associated with sarcomere structure and function, such as Ttn, Pdlim5, and Nexn, generating new protein isoforms. Using a minigene splicing reporter assay, we determined that RBPMS regulates target gene splicing through recognizing tandem intronic CAC motifs. We also showed that RBPMS knockdown in human induced pluripotent stem cell-derived cardiomyocytes impaired cardiomyocyte contraction. CONCLUSION This study identifies RBPMS as an important regulator of cardiomyocyte contraction and cardiac function by modulating sarcomeric gene alternative splicing.
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Affiliation(s)
- Peiheng Gan
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Zhaoning Wang
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
- Department of Cellular and Molecular Medicine, University of California, San Diego School of Medicine, La Jolla, CA 92093, USA
| | - Svetlana Bezprozvannaya
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
| | - John R McAnally
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Wei Tan
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Hui Li
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Rhonda Bassel-Duby
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Ning Liu
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
| | - Eric N Olson
- Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA
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Vogt EC, Bratland E, Berland S, Berentsen R, Lund A, Björnsdottir S, Husebye E, Øksnes M. Improving diagnostic precision in primary ovarian insufficiency using comprehensive genetic and autoantibody testing. Hum Reprod 2024; 39:177-189. [PMID: 37953503 PMCID: PMC10767963 DOI: 10.1093/humrep/dead233] [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: 09/23/2022] [Revised: 07/31/2023] [Indexed: 11/14/2023] Open
Abstract
STUDY QUESTION Is it possible to find the cause of primary ovarian insufficiency (POI) in more women by extensive screening? SUMMARY ANSWER Adding next generation sequencing techniques including a POI-associated gene panel, extended whole exome sequencing data, as well as specific autoantibody assays to the recommended diagnostic investigations increased the determination of a potential etiological diagnosis of POI from 11% to 41%. WHAT IS KNOWN ALREADY POI affects ∼1% of women. Clinical presentations and pathogenic mechanisms are heterogeneous and include genetic, autoimmune, and environmental factors, but the underlying etiology remains unknown in the majority of cases. STUDY DESIGN, SIZE, DURATION Prospective cross-sectional study of 100 women with newly diagnosed POI of unknown cause consecutively referred to Haukeland University Hospital, Bergen, Norway, January 2019 to December 2021. PARTICIPANTS/MATERIALS, SETTING, METHODS In addition to standard recommended diagnostic investigations including screening for chromosomal anomalies and premutations in the fragile X mental retardation 1 gene (FMR1) we used whole exome sequencing, including targeted analysis of 103 ovarian-related genes, and assays of autoantibodies against steroid cell antigens. MAIN RESULTS AND THE ROLE OF CHANCE We identified chromosomal aberrations in 8%, FMR1 premutations in 3%, genetic variants related to POI in 16%, and autoimmune POI in 3%. Furthermore in 11% we identified POI associated genetic Variants of unknown signifcance (VUS). A homozygous pathogenic variant in the ZSWIM7 gene (NM_001042697.2) was found in two women, corroborating this as a novel cause of monogenic POI. No associations between phenotypes and genotypes were found. LIMITATIONS, REASONS FOR CAUTION Use of candidate genetic and autoimmune markers limit the possibility to discover new markers. To further investigate the genetic variants, family studies would have been useful. We found a relatively high proportion of genetic variants in women from Africa and lack of genetic diversity in the genomic databases can impact diagnostic accuracy. WIDER IMPLICATIONS OF THE FINDINGS Since no specific clinical or biochemical markers predicted the underlying cause of POI discussion of which tests should be part of diagnostic screening in clinical practice remains open. New technology has altered the availability and effectiveness of genetic testing, and cost-effectiveness analyses are required to aid sustainable diagnostics. STUDY FUNDING/COMPETING INTEREST(S) The study was supported by grants and fellowships from Stiftelsen Kristian Gerhard Jebsen, the Novonordisk Foundation, the Norwegian Research Council, University of Bergen, and the Regional Health Authorities of Western Norway. The authors declare no conflict of interest. TRIAL REGISTRATION NUMBER NCT04082169.
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Affiliation(s)
- Elinor Chelsom Vogt
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - Eirik Bratland
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway
| | - Siren Berland
- Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway
| | - Ragnhild Berentsen
- Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway
| | - Agnethe Lund
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Bergen, Norway
| | - Sigridur Björnsdottir
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Department of Endocrinology, Metabolism and Diabetes, Karolinska University Hospital, Stockholm, Sweden
| | - Eystein Husebye
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
| | - Marianne Øksnes
- Department of Clinical Science, University of Bergen, Bergen, Norway
- Department of Medicine, Haukeland University Hospital, Bergen, Norway
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Li G, Luo Y, Zhang Q, Chen W, Lai K, Liu Y, Zheng Y. The RBPMS CreERT2-tdTomato mouse line for studying retinal and vascular relevant diseases. iScience 2023; 26:108111. [PMID: 37867934 PMCID: PMC10589894 DOI: 10.1016/j.isci.2023.108111] [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: 05/30/2023] [Revised: 08/27/2023] [Accepted: 09/28/2023] [Indexed: 10/24/2023] Open
Abstract
RNA-binding protein with multiple splicing (RBPMS) plays a crucial role in cardiac mesoderm specification and cardiovascular development, as well as being a typical marker for whole retinal ganglion cells (RGCs). However, there is a lack of animal models to spatiotemporally trace the location and function of RBPMS-expressing cells in vivo. In this study, we develop a tamoxifen-inducible RBPMS-tdTomato reporter mouse line to track RBPMS-expressing cells during embryogenesis and adulthood. This mouse line allows us to identify and locate RBPMS-tdTomato-positive cells among various tissues, especially in RGCs and smooth muscle cells, which assist to simulate related retinal degenerative diseases, model and examine choroidal neovascularization non-invasively in vivo. Our results show that the RBPMSCreERT2-tdTomato mouse line is a valuable tool for lineage tracing, disease modeling, drug screening, as well as isolating specific target cells.
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Affiliation(s)
- Guilan Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
- Research Units of Ocular Development and Regeneration, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yuanting Luo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Qikai Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Wenfei Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Kunbei Lai
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
| | - Yizhi Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
- Research Units of Ocular Development and Regeneration, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yingfeng Zheng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China
- Research Units of Ocular Development and Regeneration, Chinese Academy of Medical Sciences, Beijing 100730, China
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5
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Yang Y, Lee GC, Nakagaki-Silva E, Huang Y, Peacey M, Partridge R, Gooding C, Smith CJ. Cell-type specific regulator RBPMS switches alternative splicing via higher-order oligomerization and heterotypic interactions with other splicing regulators. Nucleic Acids Res 2023; 51:9961-9982. [PMID: 37548402 PMCID: PMC10570038 DOI: 10.1093/nar/gkad652] [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: 02/01/2023] [Revised: 06/28/2023] [Accepted: 07/26/2023] [Indexed: 08/08/2023] Open
Abstract
Alternative pre-mRNA splicing decisions are regulated by RNA binding proteins (RBPs) that can activate or repress regulated splice sites. Repressive RBPs typically harness multivalent interactions to bind stably to target RNAs. Multivalency can be achieved by homomeric oligomerization and heteromeric interactions with other RBPs, often mediated by intrinsically disordered regions (IDRs), and by possessing multiple RNA binding domains. Cell-specific splicing decisions often involve the action of widely expressed RBPs, which are able to bind multivalently around target exons, but without effect in the absence of a cell-specific regulator. To address how cell-specific regulators can collaborate with constitutive RBPs in alternative splicing regulation, we used the smooth-muscle specific regulator RBPMS. Recombinant RBPMS is sufficient to confer smooth muscle cell specific alternative splicing of Tpm1 exon 3 in cell-free assays by preventing assembly of ATP-dependent splicing complexes. This activity depends upon a C-terminal IDR that facilitates dynamic higher-order self-assembly, cooperative binding to multivalent RNA and interactions with widely expressed splicing co-regulators, including MBNL1 and RBFOX2, allowing cooperative assembly of stable cell-specific regulatory complexes.
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Affiliation(s)
- Yi Yang
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | - Giselle C Lee
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | | | - Yuling Huang
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | - Matthew Peacey
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | - Ruth Partridge
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
| | - Clare Gooding
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
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Bartsch D, Kalamkar K, Ahuja G, Lackmann JW, Hescheler J, Weber T, Bazzi H, Clamer M, Mendjan S, Papantonis A, Kurian L. mRNA translational specialization by RBPMS presets the competence for cardiac commitment in hESCs. SCIENCE ADVANCES 2023; 9:eade1792. [PMID: 36989351 PMCID: PMC10058251 DOI: 10.1126/sciadv.ade1792] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 02/01/2023] [Indexed: 06/19/2023]
Abstract
The blueprints of developing organs are preset at the early stages of embryogenesis. Transcriptional and epigenetic mechanisms are proposed to preset developmental trajectories. However, we reveal that the competence for the future cardiac fate of human embryonic stem cells (hESCs) is preset in pluripotency by a specialized mRNA translation circuit controlled by RBPMS. RBPMS is recruited to active ribosomes in hESCs to control the translation of essential factors needed for cardiac commitment program, including Wingless/Integrated (WNT) signaling. Consequently, RBPMS loss specifically and severely impedes cardiac mesoderm specification, leading to patterning and morphogenetic defects in human cardiac organoids. Mechanistically, RBPMS specializes mRNA translation, selectively via 3'UTR binding and globally by promoting translation initiation. Accordingly, RBPMS loss causes translation initiation defects highlighted by aberrant retention of the EIF3 complex and depletion of EIF5A from mRNAs, thereby abrogating ribosome recruitment. We demonstrate how future fate trajectories are programmed during embryogenesis by specialized mRNA translation.
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Affiliation(s)
- Deniz Bartsch
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Institute for Neurophysiology, Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Cologne Cluster of Excellence in Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany
| | - Kaustubh Kalamkar
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Institute for Neurophysiology, Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Cologne Cluster of Excellence in Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany
| | - Gaurav Ahuja
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Institute for Neurophysiology, Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Cologne Cluster of Excellence in Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany
| | - Jan-Wilm Lackmann
- Cologne Cluster of Excellence in Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany
| | - Jürgen Hescheler
- Institute for Neurophysiology, Faculty of Medicine, University of Cologne, Cologne 50931, Germany
| | - Timm Weber
- Laboratory of Experimental Immunology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne 50931, Germany
| | - Hisham Bazzi
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Cologne Cluster of Excellence in Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany
- Department of Dermatology and Venereology, Medical Faculty, University of Cologne, Cologne 50931, Germany
| | | | - Sasha Mendjan
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter, Dr. Bohr Gasse 3, Vienna 1030, Austria
| | - Argyris Papantonis
- Institute of Pathology, University Medical Center Göttingen, Göttingen 37075, Germany
| | - Leo Kurian
- Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Institute for Neurophysiology, Faculty of Medicine, University of Cologne, Cologne 50931, Germany
- Cologne Cluster of Excellence in Cellular Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, Cologne 50931, Germany
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Fassler JS, Skuodas S, Weeks DL, Phillips BT. Protein Aggregation and Disaggregation in Cells and Development. J Mol Biol 2021; 433:167215. [PMID: 34450138 PMCID: PMC8530975 DOI: 10.1016/j.jmb.2021.167215] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 08/01/2021] [Accepted: 08/18/2021] [Indexed: 12/12/2022]
Abstract
Protein aggregation is a feature of numerous neurodegenerative diseases. However, regulated, often reversible, formation of protein aggregates, also known as condensates, helps control a wide range of cellular activities including stress response, gene expression, memory, cell development and differentiation. This review presents examples of aggregates found in biological systems, how they are used, and cellular strategies that control aggregation and disaggregation. We include features of the aggregating proteins themselves, environmental factors, co-aggregates, post-translational modifications and well-known aggregation-directed activities that influence their formation, material state, stability and dissolution. We highlight the emerging roles of biomolecular condensates in early animal development, and disaggregation processing proteins that have recently been shown to play key roles in gametogenesis and embryogenesis.
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Affiliation(s)
- Jan S Fassler
- Department of Biology, University of Iowa, Iowa City, IA 52242, United States.
| | - Sydney Skuodas
- Department of Biology, University of Iowa, Iowa City, IA 52242, United States. https://twitter.com/@sskuodas
| | - Daniel L Weeks
- Department of Biochemistry, University of Iowa, Iowa City, IA 52242, United States
| | - Bryan T Phillips
- Department of Biology, University of Iowa, Iowa City, IA 52242, United States. https://twitter.com/@bt4phillips
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Akerberg AA, Burns CE, Burns CG. Exploring the Activities of RBPMS Proteins in Myocardial Biology. Pediatr Cardiol 2019; 40:1410-1418. [PMID: 31399780 PMCID: PMC6786954 DOI: 10.1007/s00246-019-02180-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 07/31/2019] [Indexed: 12/22/2022]
Abstract
Numerous RNA-binding proteins (RBPs) are expressed in the heart, and mutations in several RBPs have been implicated in cardiovascular disease through genetic associations, animal modeling, and mechanistic studies. However, the functions of many more cardiac RBPs, and their relevance to disease states, remain to be elucidated. Recently, we have initiated studies to characterize the functions of the RBPs RBPMS and RBPMS2 in regulating myocardial biology in zebrafish and higher vertebrate species. These studies began when we learned, using an unbiased gene discovery approach, that rbpms2a and rbpms2b in zebrafish are robust markers of embryonic myocardium. This observation, which is consistent with published data, suggests that the encoded proteins are likely to be performing critical functions in regulating one or more aspects of cardiomyocyte differentiation, proliferation, survival, and/or contractility. This notion is supported by recent reports demonstrating that zebrafish embryos with disrupted Rbpms2 function exhibit gross signs of cardiac distress. Interestingly, a 20-year-old study determined that myocardial tissue from the frog, chick, and mouse also express high levels of Rbpms and/or Rbpms2, which is suggestive of evolutionary conservation of function. In this review, we will provide a historical account of how RBPMS and RBPMS2 genes were discovered, attempt to clarify some potentially confusing nomenclature, and summarize published observations that inform our ongoing studies.
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Affiliation(s)
- Alexander A Akerberg
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02115, USA,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA 02129,Harvard Medical School, Boston, MA 02115
| | - Caroline E. Burns
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02115, USA,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA 02129,Harvard Medical School, Boston, MA 02115,Harvard Stem Cell Institute, Cambridge, MA 02138,Authors for Correspondence: ()
| | - C. Geoffrey Burns
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02115, USA,Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA 02129,Harvard Medical School, Boston, MA 02115,Authors for Correspondence: ()
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9
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Nakagaki-Silva EE, Gooding C, Llorian M, Jacob AG, Richards F, Buckroyd A, Sinha S, Smith CW. Identification of RBPMS as a mammalian smooth muscle master splicing regulator via proximity of its gene with super-enhancers. eLife 2019; 8:46327. [PMID: 31283468 PMCID: PMC6613909 DOI: 10.7554/elife.46327] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/12/2019] [Indexed: 01/08/2023] Open
Abstract
Alternative splicing (AS) programs are primarily controlled by regulatory RNA-binding proteins (RBPs). It has been proposed that a small number of master splicing regulators might control cell-specific splicing networks and that these RBPs could be identified by proximity of their genes to transcriptional super-enhancers. Using this approach we identified RBPMS as a critical splicing regulator in differentiated vascular smooth muscle cells (SMCs). RBPMS is highly down-regulated during phenotypic switching of SMCs from a contractile to a motile and proliferative phenotype and is responsible for 20% of the AS changes during this transition. RBPMS directly regulates AS of numerous components of the actin cytoskeleton and focal adhesion machineries whose activity is critical for SMC function in both phenotypes. RBPMS also regulates splicing of other splicing, post-transcriptional and transcription regulators including the key SMC transcription factor Myocardin, thereby matching many of the criteria of a master regulator of AS in SMCs.
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Affiliation(s)
| | - Clare Gooding
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Miriam Llorian
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom.,Francis Crick Institute, London, United Kingdom
| | - Aishwarya G Jacob
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom.,Anne McLaren Laboratory, Cambridge Stem Cell Institute, University of Cambridge, Cambridge, United Kingdom
| | - Frederick Richards
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Adrian Buckroyd
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Sanjay Sinha
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom.,Anne McLaren Laboratory, Cambridge Stem Cell Institute, University of Cambridge, Cambridge, United Kingdom
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Oh D, Houston DW. RNA Localization in the Vertebrate Oocyte: Establishment of Oocyte Polarity and Localized mRNA Assemblages. Results Probl Cell Differ 2019; 63:189-208. [PMID: 28779319 PMCID: PMC6538070 DOI: 10.1007/978-3-319-60855-6_9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
RNA localization is a fundamental mechanism for controlling cell structure and function. Early development in fish and amphibians requires the localization of specific mRNAs to establish the initial differences in cell fates prior to the onset of zygotic genome activation. RNA localization in these oocytes (e.g., Xenopus and zebrafish) requires that animal-vegetal polarity be established early in oogenesis, mediated by formation of the Balbiani body/mitochondrial cloud. This structure serves as a platform for assembly and transport of germline determinants to the future vegetal pole and also sets up the machinery for the localization of non-germline transcripts later in oogenesis. Understanding these polarization and localization mechanisms is critical for understanding the basis for early embryonic development in these organisms and also for understanding the role of RNA compartmentalization in animal gametogenesis. Here we outline recent advances in elucidating the molecular basis for the establishment of oocyte polarity at the level of Balbiani body assembly as well as the formation of RNP assemblies for early and late pathway mRNA localization in the oocyte.
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Affiliation(s)
- Denise Oh
- Department of Biology, The University of Iowa, 257 BB, Iowa City, IA, 52242, USA
| | - Douglas W Houston
- Department of Biology, The University of Iowa, 257 BB, Iowa City, IA, 52242, USA.
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Jamieson-Lucy A, Mullins MC. The vertebrate Balbiani body, germ plasm, and oocyte polarity. Curr Top Dev Biol 2019; 135:1-34. [DOI: 10.1016/bs.ctdb.2019.04.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Aguero T, Jin Z, Owens D, Malhotra A, Newman K, Yang J, King ML. Combined functions of two RRMs in Dead-end1 mimic helicase activity to promote nanos1 translation in the germline. Mol Reprod Dev 2018; 85:896-908. [PMID: 30230100 DOI: 10.1002/mrd.23062] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 09/14/2018] [Indexed: 12/31/2022]
Abstract
Dead-end1 (Dnd1) expression is restricted to the vertebrate germline where it is believed to activate translation of messenger RNAs (mRNAs) required to protect and promote that unique lineage. Nanos1 is one such germline mRNA whose translation is blocked by a secondary mRNA structure within the open reading frame (ORF). Dnd1 contains a canonical RNA recognition motif (RRM1) in its N-terminus but also contains a less conserved RRM2. Here we provide a mechanistic picture of the nanos1 mRNA-Dnd1 interaction in the Xenopus germline. We show that RRM1, but not RRM2, is required for binding nanos1. Similar to the zebrafish homolog, Xenopus Dnd1 possesses ATPase activity. Surprisingly, this activity appears to be within the RRM2, different from the C-terminal region where it is found in zebrafish. More importantly, we show that RRM2 is required for nanos1 translation and germline survival. Further, Dnd1 functions as a homodimer and binds nanos1 mRNA just downstream of the secondary structure required for nanos1 repression. We propose a model in which the RRM1 is required to bind nanos1 mRNA while the RRM2 is required to promote translation through the action of ATPase. Dnd1 appears to use RRMs to mimic the function of helicases.
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Affiliation(s)
- Tristan Aguero
- Department of Cell Biology University of Miami, Miller School of Medicine, Miami, Florida
| | - Zhigang Jin
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Dawn Owens
- Department of Cell Biology University of Miami, Miller School of Medicine, Miami, Florida
| | - Arun Malhotra
- Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, Florida
| | - Karen Newman
- Department of Cell Biology University of Miami, Miller School of Medicine, Miami, Florida
| | - Jing Yang
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Mary Lou King
- Department of Cell Biology University of Miami, Miller School of Medicine, Miami, Florida
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13
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Aguero T, Newman K, King ML. Microinjection of Xenopus Oocytes. Cold Spring Harb Protoc 2018; 2018:pdb.prot096974. [PMID: 29321284 DOI: 10.1101/pdb.prot096974] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Microinjection of Xenopus oocytes has proven to be a valuable tool in a broad array of studies that require expression of DNA or RNA into functional protein. These studies are diverse and range from expression cloning to receptor-ligand interaction to nuclear programming. Oocytes offer a number of advantages for such studies, including their large size (∼1.2 mm in diameter), capacity for translation, and enormous nucleus (0.3-0.4 mm). They are cost effective, easily manipulated, and can be injected in large numbers in a short time period. Oocytes have a large maternal stockpile of all the essential components for transcription and translation. Consequently, the investigator needs only to introduce by microinjection the specific DNA or RNA of interest for synthesis. Oocytes translate virtually any exogenous RNA regardless of source, and the translated proteins are folded, modified, and transported to the correct cellular locations. Here we present procedures for the efficient microinjection of oocytes and their subsequent care.
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Affiliation(s)
- Tristan Aguero
- Department of Cell Biology, University of Miami School of Medicine, Miami, Florida 33136
| | - Karen Newman
- Department of Cell Biology, University of Miami School of Medicine, Miami, Florida 33136
| | - Mary Lou King
- Department of Cell Biology, University of Miami School of Medicine, Miami, Florida 33136
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Lopez CE, Sheehan HC, Vierra DA, Azzinaro PA, Meedel TH, Howlett NG, Irvine SQ. Proteomic responses to elevated ocean temperature in ovaries of the ascidian Ciona intestinalis. Biol Open 2017; 6:943-955. [PMID: 28500033 PMCID: PMC5550911 DOI: 10.1242/bio.024786] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Accepted: 05/10/2017] [Indexed: 11/21/2022] Open
Abstract
Ciona intestinalis, a common sea squirt, exhibits lower reproductive success at the upper extreme of the water temperatures it experiences in coastal New England. In order to understand the changes in protein expression associated with elevated temperatures, and possible response to global temperature change, we reared C. intestinalis from embryos to adults at 18°C (a temperature at which they reproduce normally at our collection site in Rhode Island) and 22°C (the upper end of the local temperature range). We then dissected ovaries from animals at each temperature, extracted protein, and measured proteomic levels using shotgun mass spectrometry (LC-MS/MS). 1532 proteins were detected at a 1% false discovery rate present in both temperature groups by our LC-MS/MS method. 62 of those proteins are considered up- or down-regulated according to our statistical criteria. Principal component analysis shows a clear distinction in protein expression pattern between the control (18°C) group and high temperature (22°C) group. Similar to previous studies, cytoskeletal and chaperone proteins are upregulated in the high temperature group. Unexpectedly, we find evidence that proteolysis is downregulated at the higher temperature. We propose a working model for the high temperature response in C. intestinalis ovaries whereby increased temperature induces upregulation of signal transduction pathways involving PTPN11 and CrkL, and activating coordinated changes in the proteome especially in large lipid transport proteins, cellular stress responses, cytoskeleton, and downregulation of energy metabolism.
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Affiliation(s)
- Chelsea E Lopez
- Departments of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - Hannah C Sheehan
- Departments of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
| | - David A Vierra
- Cell and Molecular Biology, University of Rhode Island, Kingston, RI 02881, USA
| | - Paul A Azzinaro
- Cell and Molecular Biology, University of Rhode Island, Kingston, RI 02881, USA
| | - Thomas H Meedel
- Biology Department, Rhode Island College, Providence, RI 02908, USA
| | - Niall G Howlett
- Cell and Molecular Biology, University of Rhode Island, Kingston, RI 02881, USA
| | - Steven Q Irvine
- Departments of Biological Sciences, University of Rhode Island, Kingston, RI 02881, USA
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15
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Mitochondrial matters: Mitochondrial bottlenecks, self-assembling structures, and entrapment in the female germline. Stem Cell Res 2017; 21:178-186. [PMID: 28336253 DOI: 10.1016/j.scr.2017.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 11/22/2016] [Accepted: 03/10/2017] [Indexed: 12/17/2022] Open
Abstract
Mitochondrial replacement therapy, a procedure to generate embryos with the nuclear genome of a donor mother and the healthy mitochondria of a recipient egg, has recently emerged as a promising strategy to prevent transmission of devastating mitochondrial DNA diseases and infertility. The procedure may produce an embryo that is free of diseased mitochondria. A recent study addresses important fundamental questions about the mechanisms underlying maternal inheritance and translational questions regarding the transgenerational effectiveness of this promising therapeutic strategy. This review considers recent advances in our understanding of maternal inheritance of mitochondria, implications for fertility and mitochondrial disease, and potential roles for the Balbiani body, an ancient oocyte structure, in mitochondrial selection in oocytes, with emphasis on therapies to remedy mitochondrial disorders.
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Soufari H, Mackereth CD. Conserved binding of GCAC motifs by MEC-8, couch potato, and the RBPMS protein family. RNA (NEW YORK, N.Y.) 2017; 23:308-316. [PMID: 28003515 PMCID: PMC5311487 DOI: 10.1261/rna.059733.116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 12/19/2016] [Indexed: 05/16/2023]
Abstract
Precise regulation of mRNA processing, translation, localization, and stability relies on specific interactions with RNA-binding proteins whose biological function and target preference are dictated by their preferred RNA motifs. The RBPMS family of RNA-binding proteins is defined by a conserved RNA recognition motif (RRM) domain found in metazoan RBPMS/Hermes and RBPMS2, Drosophila couch potato, and MEC-8 from Caenorhabditis elegans In order to determine the parameters of RNA sequence recognition by the RBPMS family, we have first used the N-terminal domain from MEC-8 in binding assays and have demonstrated a preference for two GCAC motifs optimally separated by >6 nucleotides (nt). We have also determined the crystal structure of the dimeric N-terminal RRM domain from MEC-8 in the unbound form, and in complex with an oligonucleotide harboring two copies of the optimal GCAC motif. The atomic details reveal the molecular network that provides specificity to all four bases in the motif, including multiple hydrogen bonds to the initial guanine. Further studies with human RBPMS, as well as Drosophila couch potato, confirm a general preference for this double GCAC motif by other members of the protein family and the presence of this motif in known targets.
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Affiliation(s)
- Heddy Soufari
- University of Bordeaux, Institut Européen de Chimie et Biologie, F-33607 Pessac, France
- Inserm U1212, CNRS UMR 5320, ARNA Laboratory, F-33076 Bordeaux, France
| | - Cameron D Mackereth
- University of Bordeaux, Institut Européen de Chimie et Biologie, F-33607 Pessac, France
- Inserm U1212, CNRS UMR 5320, ARNA Laboratory, F-33076 Bordeaux, France
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