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Royer C, Sandham E, Slee E, Schneider F, Lagerholm CB, Godwin J, Veits N, Hathrell H, Zhou F, Leonavicius K, Garratt J, Narendra T, Vincent A, Jones C, Child T, Coward K, Graham C, Fritzsche M, Lu X, Srinivas S. ASPP2 maintains the integrity of mechanically stressed pseudostratified epithelia during morphogenesis. Nat Commun 2022; 13:941. [PMID: 35177595 PMCID: PMC8854694 DOI: 10.1038/s41467-022-28590-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/28/2022] [Indexed: 11/09/2022] Open
Abstract
During development, pseudostratified epithelia undergo large scale morphogenetic events associated with increased mechanical stress. Using a variety of genetic and imaging approaches, we uncover that in the mouse E6.5 epiblast, where apical tension is highest, ASPP2 safeguards tissue integrity. It achieves this by preventing the most apical daughter cells from delaminating apically following division events. In this context, ASPP2 maintains the integrity and organisation of the filamentous actin cytoskeleton at apical junctions. ASPP2 is also essential during gastrulation in the primitive streak, in somites and in the head fold region, suggesting that it is required across a wide range of pseudostratified epithelia during morphogenetic events that are accompanied by intense tissue remodelling. Finally, our study also suggests that the interaction between ASPP2 and PP1 is essential to the tumour suppressor function of ASPP2, which may be particularly relevant in the context of tissues that are subject to increased mechanical stress. The early embryo maintains its structure in the face of large mechanical stresses during morphogenesis. Here they show that ASPP2 acts to preserve epithelial integrity in regions of high apical tension during early development.
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Affiliation(s)
- Christophe Royer
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK.
| | - Elizabeth Sandham
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK
| | - Elizabeth Slee
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
| | - Falk Schneider
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK.,Translational Imaging Center, University of Southern California, Los Angeles, CA, 90089, USA
| | - Christoffer B Lagerholm
- Wolfson Imaging Centre Oxford, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Jonathan Godwin
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK.,Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK
| | - Nisha Veits
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK
| | - Holly Hathrell
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK
| | - Felix Zhou
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
| | - Karolis Leonavicius
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK.,Institute of Biotechnology, Vilnius University, Vilnius, Lithuania
| | - Jemma Garratt
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK.,Nuffield Department of Women's and Reproductive Health, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK
| | - Tanaya Narendra
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK.,Nuffield Department of Women's and Reproductive Health, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK
| | - Anna Vincent
- Oxford Fertility, Institute of Reproductive Sciences, Oxford Business Park North, Oxford, OX4 2HW, UK
| | - Celine Jones
- Nuffield Department of Women's and Reproductive Health, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK
| | - Tim Child
- Nuffield Department of Women's and Reproductive Health, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK.,Oxford Fertility, Institute of Reproductive Sciences, Oxford Business Park North, Oxford, OX4 2HW, UK
| | - Kevin Coward
- Nuffield Department of Women's and Reproductive Health, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK
| | - Chris Graham
- Nuffield Department of Women's and Reproductive Health, University of Oxford, Level 3, Women's Centre, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK
| | - Marco Fritzsche
- Kennedy Institute for Rheumatology, University of Oxford, Oxford, OX3 7LF, UK.,Rosalind Franklin Institute, Didcot, OX11 0QS, UK
| | - Xin Lu
- Ludwig Institute for Cancer Research, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK
| | - Shankar Srinivas
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, OX1 3QX, UK.
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Schneider KRA, Chettri A, Cole HD, Reglinski K, Brückmann J, Roque JA, Stumper A, Nauroozi D, Schmid S, Lagerholm CB, Rau S, Bäuerle P, Eggeling C, Cameron CG, McFarland SA, Dietzek B. Intracellular Photophysics of an Osmium Complex bearing an Oligothiophene Extended Ligand. Chemistry 2020; 26:14844-14851. [PMID: 32761643 PMCID: PMC7704931 DOI: 10.1002/chem.202002667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/26/2020] [Indexed: 12/27/2022]
Abstract
This contribution describes the excited-state properties of an Osmium-complex when taken up into human cells. The complex 1 [Os(bpy)2 (IP-4T)](PF6 )2 with bpy=2,2'-bipyridine and IP-4T=2-{5'-[3',4'-diethyl-(2,2'-bithien-5-yl)]-3,4-diethyl-2,2'-bithiophene}imidazo[4,5-f][1,10]phenanthroline) can be discussed as a candidate for photodynamic therapy in the biological red/NIR window. The complex is taken up by MCF7 cells and localizes rather homogeneously within in the cytoplasm. To detail the sub-ns photophysics of 1, comparative transient absorption measurements were carried out in different solvents to derive a model of the photoinduced processes. Key to rationalize the excited-state relaxation is a long-lived 3 ILCT state associated with the oligothiophene chain. This model was then tested with the complex internalized into MCF7 cells, since the intracellular environment has long been suspected to take big influence on the excited state properties. In our study of 1 in cells, we were able to show that, though the overall model remained the same, the excited-state dynamics are affected strongly by the intracellular environment. Our study represents the first in depth correlation towards ex-vivo and in vivo ultrafast spectroscopy for a possible photodrug.
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Affiliation(s)
- Kilian R. A. Schneider
- Department Functional Interfaces (K.R.A.S., A.C., B.D.)Department Biophysical Imaging (K.R., C.E.)Leibniz Institute of Photonic Technology (IPHT) e. V.Albert-Einstein-Straße 907745JenaGermany
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich-Schiller-University JenaHelmholtzweg 407743JenaGermany
| | - Avinash Chettri
- Department Functional Interfaces (K.R.A.S., A.C., B.D.)Department Biophysical Imaging (K.R., C.E.)Leibniz Institute of Photonic Technology (IPHT) e. V.Albert-Einstein-Straße 907745JenaGermany
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich-Schiller-University JenaHelmholtzweg 407743JenaGermany
| | - Houston D. Cole
- Department of Chemistry and BiochemistryThe University of Texas at ArlingtonArlingtonTX76019-0065USA
| | - Katharina Reglinski
- Department Functional Interfaces (K.R.A.S., A.C., B.D.)Department Biophysical Imaging (K.R., C.E.)Leibniz Institute of Photonic Technology (IPHT) e. V.Albert-Einstein-Straße 907745JenaGermany
- Institute of Applied Optic and BiophysicsFriedrich-Schiller University JenaMax-Wien-Platz 107743JenaGermany
- University Hospital JenaBachstraße 1807743JenaGermany
| | - Jannik Brückmann
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - John A. Roque
- Department of Chemistry and BiochemistryThe University of Texas at ArlingtonArlingtonTX76019-0065USA
- Department of Chemistry and BiochemistryThe University of North Carolina at GreensboroGreensboroNorth Carolina27402USA
| | - Anne Stumper
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Djawed Nauroozi
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Sylvia Schmid
- Institute of Organic Chemistry II and Advanced MaterialsUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | | | - Sven Rau
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Peter Bäuerle
- Institute of Organic Chemistry II and Advanced MaterialsUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Christian Eggeling
- Department Functional Interfaces (K.R.A.S., A.C., B.D.)Department Biophysical Imaging (K.R., C.E.)Leibniz Institute of Photonic Technology (IPHT) e. V.Albert-Einstein-Straße 907745JenaGermany
- Institute of Applied Optic and BiophysicsFriedrich-Schiller University JenaMax-Wien-Platz 107743JenaGermany
- <MRC Human Immunology Unit & Wolfson Imaging Center OxfordHeadley WayOxfordOX3 9DSUK
| | - Colin G. Cameron
- Department of Chemistry and BiochemistryThe University of Texas at ArlingtonArlingtonTX76019-0065USA
| | - Sherri A. McFarland
- Department of Chemistry and BiochemistryThe University of Texas at ArlingtonArlingtonTX76019-0065USA
| | - Benjamin Dietzek
- Department Functional Interfaces (K.R.A.S., A.C., B.D.)Department Biophysical Imaging (K.R., C.E.)Leibniz Institute of Photonic Technology (IPHT) e. V.Albert-Einstein-Straße 907745JenaGermany
- Institute of Physical Chemistry and Abbe Center of PhotonicsFriedrich-Schiller-University JenaHelmholtzweg 407743JenaGermany
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