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Brown HE, Weasner BP, Weasner BM, Kumar JP. Polycomb safeguards imaginal disc specification through control of the Vestigial-Scalloped complex. Development 2023; 150:dev201872. [PMID: 37702007 PMCID: PMC10560572 DOI: 10.1242/dev.201872] [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: 04/18/2023] [Accepted: 09/04/2023] [Indexed: 09/14/2023]
Abstract
A fundamental goal of developmental biology is to understand how cell and tissue fates are specified. The imaginal discs of Drosophila are excellent model systems for addressing this paradigm as their fate can be redirected when discs regenerate after injury or when key selector genes are misregulated. Here, we show that when Polycomb expression is reduced, the wing selector gene vestigial is ectopically activated. This leads to the inappropriate formation of the Vestigial-Scalloped complex, which forces the eye to transform into a wing. We further demonstrate that disrupting this complex does not simply block wing formation or restore eye development. Instead, immunohistochemistry and high-throughput genomic analysis show that the eye-antennal disc unexpectedly undergoes hyperplastic growth with multiple domains being organized into other imaginal discs and tissues. These findings provide insight into the complex developmental landscape that tissues must navigate before adopting their final fate.
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Affiliation(s)
- Haley E. Brown
- Department of Biology, Indiana University, Bloomington, IN 47405, USA
| | | | - Bonnie M. Weasner
- Department of Biology, Indiana University, Bloomington, IN 47405, USA
| | - Justin P. Kumar
- Department of Biology, Indiana University, Bloomington, IN 47405, USA
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Brown HE, Weasner BP, Weasner BM, Kumar JP. Polycomb safeguards imaginal disc specification through control of the Vestigial-Scalloped complex. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.11.536444. [PMID: 37090526 PMCID: PMC10120697 DOI: 10.1101/2023.04.11.536444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
A fundamental goal of developmental biology is to understand how cell and tissue fates are specified. The imaginal discs of Drosophila are excellent model systems for addressing this paradigm as their fate can be redirected when discs regenerate after injury or when key selector genes are mis-regulated. Here, we show that when Polycomb expression is reduced, the wing selector gene vestigial is ectopically activated. This leads to the inappropriate formation of the Vestigial-Scalloped complex which forces the eye to transform into a wing. We further demonstrate that disrupting this complex does not simply block wing formation or restore eye development. Instead, immunohistochemistry and high throughput genomic analysis show that the eye-antennal disc unexpectedly undergoes hyperplastic growth with multiple domains being organized into other imaginal discs and tissues. These findings provide insight into the complex developmental landscape that tissues must navigate before adopting their final fate. Summary Statement Here we describe a novel mechanism by which Pc promotes an eye fate during normal development and how the eye is reprogrammed into a wing in its absence.
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Affiliation(s)
- Haley E. Brown
- Department of Biology, Indiana University, Bloomington, IN 47405 USA
| | | | - Bonnie M. Weasner
- Department of Biology, Indiana University, Bloomington, IN 47405 USA
| | - Justin P. Kumar
- Department of Biology, Indiana University, Bloomington, IN 47405 USA
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Ding X, Li Z, Peng K, Zou R, Wu C, Lin G, Li W, Xue L. Snail regulates Hippo signalling-mediated cell proliferation and tissue growth in Drosophila. Open Biol 2022; 12:210357. [PMID: 35259952 PMCID: PMC8905163 DOI: 10.1098/rsob.210357] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Snail (Sna) plays a pivotal role in epithelia-mesenchymal transition and cancer metastasis, yet its functions in normal tissue development remain elusive. Here, using Drosophila as a model organism, we identified Sna as an essential regulator of Hippo signalling-mediated cell proliferation and tissue growth. First, Sna is necessary and sufficient for impaired Hippo signalling-induced cell proliferation and tissue overgrowth. Second, Sna is necessary and sufficient for the expression of Hippo pathway target genes. Third, genetic epistasis data indicate Sna acts downstream of Yki in the Hippo signalling. Finally, Sna is physiologically required for tissue growth in normal development. Mechanistically, Yki activates the transcription of sna, whose protein product binds to Scalloped (Sd) and promotes Sd-dependent cell proliferation. Thus, this study uncovered a previously unknown physiological function of Sna in normal tissue development and revealed the underlying mechanism by which Sna modulates Hippo signalling-mediated cell proliferation and tissue growth.
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Affiliation(s)
- Xiang Ding
- Institute of Intervention Vessel, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China
| | - Zhuojie Li
- Institute of Intervention Vessel, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China
| | - Kai Peng
- Institute of Intervention Vessel, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China
| | - Rui Zou
- Institute of Intervention Vessel, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China
| | - Chenxi Wu
- Institute of Intervention Vessel, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China,College of Traditional Chinese Medicine, North China University of Science and Technology, Tangshan, Hebei, People's Republic of China
| | - Gufa Lin
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of Ministry of Education, Orthopaedic Department of Tongji Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, People's Republic of China
| | - Wenzhe Li
- Institute of Intervention Vessel, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China
| | - Lei Xue
- Institute of Intervention Vessel, Shanghai 10th People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China,Zhuhai Precision Medical Center, Zhuhai People's Hospital, Zhuhai Hospital Affiliated with Jinan University, Zhuhai, Guangdong, People's Republic of China,National Clinical Research Center for Interventional Medicine, Shanghai 10th People's Hospital, Tongji University, Shanghai, People's Republic of China
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Figeac N, Mohamed AD, Sun C, Schönfelder M, Matallanas D, Garcia-Munoz A, Missiaglia E, Collie-Duguid E, De Mello V, Pobbati AV, Pruller J, Jaka O, Harridge SDR, Hong W, Shipley J, Vargesson N, Zammit PS, Wackerhage H. VGLL3 operates via TEAD1, TEAD3 and TEAD4 to influence myogenesis in skeletal muscle. J Cell Sci 2019; 132:jcs.225946. [PMID: 31138678 PMCID: PMC6633393 DOI: 10.1242/jcs.225946] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 05/03/2019] [Indexed: 12/21/2022] Open
Abstract
VGLL proteins are transcriptional co-factors that bind TEAD family transcription factors to regulate events ranging from wing development in fly, to muscle fibre composition and immune function in mice. Here, we characterise Vgll3 in skeletal muscle. We found that mouse Vgll3 was expressed at low levels in healthy muscle but that its levels increased during hypertrophy or regeneration; in humans, VGLL3 was highly expressed in tissues from patients with various muscle diseases, such as in dystrophic muscle and alveolar rhabdomyosarcoma. Interaction proteomics revealed that VGLL3 bound TEAD1, TEAD3 and TEAD4 in myoblasts and/or myotubes. However, there was no interaction with proteins from major regulatory systems such as the Hippo kinase cascade, unlike what is found for the TEAD co-factors YAP (encoded by YAP1) and TAZ (encoded by WWTR1). Vgll3 overexpression reduced the activity of the Hippo negative-feedback loop, affecting expression of muscle-regulating genes including Myf5, Pitx2 and Pitx3, and genes encoding certain Wnts and IGFBPs. VGLL3 mainly repressed gene expression, regulating similar genes to those regulated by YAP and TAZ. siRNA-mediated Vgll3 knockdown suppressed myoblast proliferation, whereas Vgll3 overexpression strongly promoted myogenic differentiation. However, skeletal muscle was overtly normal in Vgll3-null mice, presumably due to feedback signalling and/or redundancy. This work identifies VGLL3 as a transcriptional co-factor operating with the Hippo signal transduction network to control myogenesis. Summary: VGLL3 interacts with TEAD transcription factors to direct expression of crucial muscle regulatory genes and contribute to the control of skeletal myogenesis.
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Affiliation(s)
- Nicolas Figeac
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK
| | - Abdalla D Mohamed
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK.,Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environment and Health, Ingolstaedter Landstrasse 1, D-85764 Munich/Neuherberg, Germany
| | - Congshan Sun
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK.,Department of Neurology, The Johns Hopkins School of Medicine, Baltimore, MD 21205, USA
| | - Martin Schönfelder
- Faculty of Sport and Health Sciences, Technical University of Munich, Georg-Brauchle-Ring 60, 80992 Munich, Germany
| | - David Matallanas
- Systems Biology Ireland, Conway Institute, Belfield; Dublin 4, Ireland
| | | | - Edoardo Missiaglia
- Institute of Pathology, Lausanne University Hospital (CHUV), 1011 Lausanne, Switzerland
| | - Elaina Collie-Duguid
- University of Aberdeen, Centre for Genome Enabled Biology and Medicine, 23 St Machar Drive, Aberdeen AB24 3RY, UK
| | - Vanessa De Mello
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Ajaybabu V Pobbati
- Institute of Molecular and Cell Biology, A-STAR, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Johanna Pruller
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK
| | - Oihane Jaka
- Centre for Human and Applied Physiological Sciences, King's College London, London SE1 1UL, UK
| | - Stephen D R Harridge
- Centre for Human and Applied Physiological Sciences, King's College London, London SE1 1UL, UK
| | - Wanjin Hong
- Institute of Molecular and Cell Biology, A-STAR, 61 Biopolis Drive, Singapore 138673, Singapore
| | - Janet Shipley
- Sarcoma Molecular Pathology Team, Divisions of Molecular Pathology and Cancer Therapeutics, Institute of Cancer Research, Surrey, SM2 5NG, UK
| | - Neil Vargesson
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
| | - Peter S Zammit
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK
| | - Henning Wackerhage
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK .,Faculty of Sport and Health Sciences, Technical University of Munich, Georg-Brauchle-Ring 60, 80992 Munich, Germany
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