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Wölwer CB, Gödde N, Pase LB, Elsum IA, Lim KYB, Sacirbegovic F, Walkley CR, Ellis S, Ohno S, Matsuzaki F, Russell SM, Humbert PO. The Asymmetric Cell Division Regulators Par3, Scribble and Pins/Gpsm2 Are Not Essential for Erythroid Development or Enucleation. PLoS One 2017; 12:e0170295. [PMID: 28095473 PMCID: PMC5240992 DOI: 10.1371/journal.pone.0170295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 01/03/2017] [Indexed: 12/30/2022] Open
Abstract
Erythroid enucleation is the process by which the future red blood cell disposes of its nucleus prior to entering the blood stream. This key event during red blood cell development has been likened to an asymmetric cell division (ACD), by which the enucleating erythroblast divides into two very different daughter cells of alternate molecular composition, a nucleated cell that will be removed by associated macrophages, and the reticulocyte that will mature to the definitive erythrocyte. Here we investigated gene expression of members of the Par, Scribble and Pins/Gpsm2 asymmetric cell division complexes in erythroid cells, and functionally tested their role in erythroid enucleation in vivo and ex vivo. Despite their roles in regulating ACD in other contexts, we found that these polarity regulators are not essential for erythroid enucleation, nor for erythroid development in vivo. Together our results put into question a role for cell polarity and asymmetric cell division in erythroid enucleation.
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Affiliation(s)
- Christina B. Wölwer
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, East Melbourne, Australia
- La Trobe Institute for Molecular Science, Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia
| | - Nathan Gödde
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, East Melbourne, Australia
- La Trobe Institute for Molecular Science, Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia
| | - Luke B. Pase
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, East Melbourne, Australia
| | - Imogen A. Elsum
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, East Melbourne, Australia
| | - Krystle Y. B. Lim
- La Trobe Institute for Molecular Science, Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia
| | - Faruk Sacirbegovic
- Immune Signaling Laboratory, Peter MacCallum Cancer Centre, East Melbourne, Australia
- Department of Pathology, University of Melbourne, Parkville, Victoria, Australia
| | - Carl R. Walkley
- St. Vincent’s Institute of Medical Research, Fitzroy, Victoria, Australia
- Department of Medicine, St. Vincent’s Hospital, The University of Melbourne, Fitzroy, Victoria
| | - Sarah Ellis
- Immune Signaling Laboratory, Peter MacCallum Cancer Centre, East Melbourne, Australia
- Department of Pathology, University of Melbourne, Parkville, Victoria, Australia
| | - Shigeo Ohno
- Department of Molecular Biology, Yokohama City University Graduate School of Medical Science, Yokohama, Japan
| | - Fumio Matsuzaki
- Laboratory for Cell Asymmetry, RIKEN Center for Developmental Biology, Kobe, Japan
| | - Sarah M. Russell
- Department of Pathology, University of Melbourne, Parkville, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
- Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, Australia
| | - Patrick O. Humbert
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, East Melbourne, Australia
- La Trobe Institute for Molecular Science, Department of Biochemistry and Genetics, La Trobe University, Melbourne, Australia
- Department of Pathology, University of Melbourne, Parkville, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
- Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria, Australia
- * E-mail:
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Abstract
Although erythroid enucleation, the property of erythroblasts to expel their nucleus, has been known for 7ore than a century, surprisingly little is known regarding the molecular mechanisms governing this unique developmental process. Here we show that similar to cytokinesis, nuclear extrusion requires intracellular calcium signaling and signal transduction through the calmodulin (CaM) pathway. However, in contrast to cytokinesis we found that orthochromatic erythroblasts require uptake of extracellular calcium to enucleate. Together these functional studies highlight a critical role for calcium signaling in the regulation of erythroid enucleation.
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Affiliation(s)
- Christina B. Wölwer
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Luke B. Pase
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
| | - Sarah M. Russell
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
- Immune Signaling Laboratory, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Melbourne, Victoria, Australia
| | - Patrick O. Humbert
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Victoria, Australia
- Department of Pathology, University of Melbourne, Melbourne, Victoria, Australia
- Department of Biochemistry and Molecular Biology, University of Melbourne, Melbourne, Victoria, Australia
- * E-mail:
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Wölwer CB, Pase LB, Pearson HB, Gödde NJ, Lackovic K, Huang DCS, Russell SM, Humbert PO. A Chemical Screening Approach to Identify Novel Key Mediators of Erythroid Enucleation. PLoS One 2015; 10:e0142655. [PMID: 26569102 PMCID: PMC4646491 DOI: 10.1371/journal.pone.0142655] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 10/26/2015] [Indexed: 01/06/2023] Open
Abstract
Erythroid enucleation is critical for terminal differentiation of red blood cells, and involves extrusion of the nucleus by orthochromatic erythroblasts to produce reticulocytes. Due to the difficulty of synchronizing erythroblasts, the molecular mechanisms underlying the enucleation process remain poorly understood. To elucidate the cellular program governing enucleation, we utilized a novel chemical screening approach whereby orthochromatic cells primed for enucleation were enriched ex vivo and subjected to a functional drug screen using a 324 compound library consisting of structurally diverse, medicinally active and cell permeable drugs. Using this approach, we have confirmed the role of HDACs, proteasomal regulators and MAPK in erythroid enucleation and introduce a new role for Cyclin-dependent kinases, in particular CDK9, in this process. Importantly, we demonstrate that when coupled with imaging analysis, this approach provides a powerful means to identify and characterize rate limiting steps involved in the erythroid enucleation process.
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Affiliation(s)
- Christina B. Wölwer
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
| | - Luke B. Pase
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
| | - Helen B. Pearson
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
| | - Nathan J. Gödde
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
| | - Kurt Lackovic
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - David C. S. Huang
- The Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
- Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Sarah M. Russell
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
- Immune Signaling Laboratory, Peter MacCallum Cancer Centre, Melbourne, Australia
- Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, Australia
| | - Patrick O. Humbert
- Cell Cycle and Cancer Genetics, Peter MacCallum Cancer Centre, Melbourne, Australia
- Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, Australia
- Department of Pathology, University of Melbourne, Melbourne, Australia
- Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria, Australia
- * E-mail:
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