1
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Corsini M, Ravelli C, Grillo E, Domenichini M, Mitola S. Mutation in the Kinase Domain Alters the VEGFR2 Membrane Dynamics. Cells 2024; 13:1346. [PMID: 39195235 DOI: 10.3390/cells13161346] [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: 05/28/2024] [Revised: 07/31/2024] [Accepted: 08/12/2024] [Indexed: 08/29/2024] Open
Abstract
BACKGROUND Recently, the substitution R1051Q in VEGFR2 has been described as a cancer-associated "gain of function" mutation. VEGFR2R1051Q phosphorylation is ligand-independent and enhances the activation of intracellular pathways and cell growth both in vitro and in vivo. In cancer, this mutation is found in heterozygosity, suggesting that an interaction between VEGFR2R1051Q and VEGFR2WT may occur and could explain, at least in part, how VEGFR2R1051Q acts to promote VEGFR2 signaling. Despite this, the biochemical/biophysical mechanism of the activation of VEGFR2R1051Q remains poorly understood. On these bases, the aim of our study is to address how VEGFR2R1051Q influences the biophysical behavior (dimerization and membrane dynamics) of the co-expressed VEGFR2WT. METHODS We employed quantitative FLIM/FRET and FRAP imaging techniques using CHO cells co-transfected with the two forms of VEGFR2 to mimic heterozygosity. RESULTS Membrane protein biotinylation reveals that VEGFR2WT is more exposed on the cell membrane with respect to VEGFR2R1051Q. The imaging analyses show the ability of VEGFR2WT to form heterodimers with VEGFR2R1051Q and this interaction alters its membrane dynamics. Indeed, when the co-expression of VEGFR2WT/VEGFR2R1051Q occurs, VEGFR2WT shows reduced lateral motility and a minor pool of mobile fraction. CONCLUSIONS This study demonstrates that active VEGFR2R1051Q can affect the membrane behavior of the VEGFR2WT.
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Affiliation(s)
- Michela Corsini
- Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
- CN3 "Sviluppo di Terapia Genica e Farmaci con Tecnologia ad RNA", 25123 Brescia, Italy
| | - Cosetta Ravelli
- Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
- CIB Consorzio Interuniversitario per le Biotecnologie, 25123 Brescia, Italy
| | - Elisabetta Grillo
- Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
- CIB Consorzio Interuniversitario per le Biotecnologie, 25123 Brescia, Italy
| | - Mattia Domenichini
- Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
| | - Stefania Mitola
- Department of Molecular and Translational Medicine, University of Brescia, 25123 Brescia, Italy
- CN3 "Sviluppo di Terapia Genica e Farmaci con Tecnologia ad RNA", 25123 Brescia, Italy
- CIB Consorzio Interuniversitario per le Biotecnologie, 25123 Brescia, Italy
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2
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Winkelmann H, Richter CP, Eising J, Piehler J, Kurre R. Correlative single-molecule and structured illumination microscopy of fast dynamics at the plasma membrane. Nat Commun 2024; 15:5813. [PMID: 38987559 PMCID: PMC11236984 DOI: 10.1038/s41467-024-49876-9] [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: 09/25/2023] [Accepted: 06/21/2024] [Indexed: 07/12/2024] Open
Abstract
Total internal reflection fluorescence (TIRF) microscopy offers powerful means to uncover the functional organization of proteins in the plasma membrane with very high spatial and temporal resolution. Traditional TIRF illumination, however, shows a Gaussian intensity profile, which is typically deteriorated by overlaying interference fringes hampering precise quantification of intensities-an important requisite for quantitative analyses in single-molecule localization microscopy (SMLM). Here, we combine flat-field illumination by using a standard πShaper with multi-angular TIR illumination by incorporating a spatial light modulator compatible with fast super-resolution structured illumination microscopy (SIM). This distinct combination enables quantitative multi-color SMLM with a highly homogenous illumination. By using a dual camera setup with optimized image splitting optics, we achieve a versatile combination of SMLM and SIM with up to three channels. We deploy this setup for establishing robust detection of receptor stoichiometries based on single-molecule intensity analysis and single-molecule Förster resonance energy transfer (smFRET). Homogeneous illumination furthermore enables long-term tracking and localization microscopy (TALM) of cell surface receptors identifying spatial heterogeneity of mobility and accessibility in the plasma membrane. By combination of TALM and SIM, spatially and molecularly heterogenous diffusion properties can be correlated with nanoscale cytoskeletal organization and dynamics.
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Affiliation(s)
- Hauke Winkelmann
- Division of Biophysics, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany
| | - Christian P Richter
- Division of Biophysics, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany
| | - Jasper Eising
- Division of Biophysics, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany
| | - Jacob Piehler
- Division of Biophysics, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany.
- Center for Cellular Nanoanalytics, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany.
| | - Rainer Kurre
- Division of Biophysics, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany.
- Center for Cellular Nanoanalytics, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany.
- Integrated Bioimaging Facility iBiOs, Department of Biology/Chemistry, Osnabrück University, Barbarastraße 11, D-49076, Osnabrück, Germany.
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3
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Johnson D, Colijn S, Richee J, Yano J, Burns M, Davis AE, Pham VN, Saric A, Jain A, Yin Y, Castranova D, Melani M, Fujita M, Grainger S, Bonifacino JS, Weinstein BM, Stratman AN. Regulation of angiogenesis by endocytic trafficking mediated by cytoplasmic dynein 1 light intermediate chain 1. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.01.587559. [PMID: 38903077 PMCID: PMC11188074 DOI: 10.1101/2024.04.01.587559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Dynein cytoplasmic 1 light intermediate chain 1 (LIC1, DYNC1LI1) is a core subunit of the dynein motor complex. The LIC1 subunit also interacts with various cargo adaptors to regulate Rab-mediated endosomal recycling and lysosomal degradation. Defects in this gene are predicted to alter dynein motor function, Rab binding capabilities, and cytoplasmic cargo trafficking. Here, we have identified a dync1li1 zebrafish mutant, harboring a premature stop codon at the exon 12/13 splice acceptor site, that displays increased angiogenesis. In vitro, LIC1-deficient human endothelial cells display increases in cell surface levels of the pro-angiogenic receptor VEGFR2, SRC phosphorylation, and Rab11-mediated endosomal recycling. In vivo, endothelial-specific expression of constitutively active Rab11a leads to excessive angiogenesis, similar to the dync1li1 mutants. Increased angiogenesis is also evident in zebrafish harboring mutations in rilpl1/2, the adaptor proteins that promote Rab docking to Lic1 to mediate lysosomal targeting. These findings suggest that LIC1 and the Rab-adaptor proteins RILPL1 and 2 restrict angiogenesis by promoting degradation of VEGFR2-containing recycling endosomes. Disruption of LIC1- and RILPL1/2-mediated lysosomal targeting increases Rab11-mediated recycling endosome activity, promoting excessive SRC signaling and angiogenesis.
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Affiliation(s)
- Dymonn Johnson
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Sarah Colijn
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Jahmiera Richee
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Joseph Yano
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Cell and Molecular Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Margaret Burns
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Andrew E. Davis
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Van N. Pham
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Amra Saric
- Section on Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Neurosciences and Mental Health Program, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada
| | - Akansha Jain
- Section on Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Ying Yin
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
| | - Daniel Castranova
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Mariana Melani
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Fundación Instituto Leloir, Buenos Aires, Argentina
- Consejo Nacional De Investigaciones Científicas Y Técnicas (CONICET), Buenos Aires, Argentina
- Departamento De Fisiología, Biología Molecular Y Celular, Facultad De Ciencias Exactas Y Naturales, Universidad De Buenos Aires, Buenos Aires, Argentina
| | - Misato Fujita
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
- Kanagawa University, Kanagawa, 221-8686, Japan
| | - Stephanie Grainger
- Department of Cell Biology, Van Andel Institute, Grand Rapids, MI, 49503
| | - Juan S. Bonifacino
- Section on Intracellular Protein Trafficking, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Brant M. Weinstein
- Section on Vertebrate Organogenesis, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, 20892
| | - Amber N. Stratman
- Cell Biology and Physiology, Washington University in St. Louis School of Medicine, St. Louis, MO 63110
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4
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Chakraborty MP, Das D, Mondal P, Kaul P, Bhattacharyya S, Kumar Das P, Das R. Molecular basis of VEGFR1 autoinhibition at the plasma membrane. Nat Commun 2024; 15:1346. [PMID: 38355851 PMCID: PMC10866885 DOI: 10.1038/s41467-024-45499-2] [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: 06/08/2023] [Accepted: 01/24/2024] [Indexed: 02/16/2024] Open
Abstract
Ligand-independent activation of VEGFRs is a hallmark of diabetes and several cancers. Like EGFR, VEGFR2 is activated spontaneously at high receptor concentrations. VEGFR1, on the other hand, remains constitutively inactive in the unligated state, making it an exception among VEGFRs. Ligand stimulation transiently phosphorylates VEGFR1 and induces weak kinase activation in endothelial cells. Recent studies, however, suggest that VEGFR1 signaling is indispensable in regulating various physiological or pathological events. The reason why VEGFR1 is regulated differently from other VEGFRs remains unknown. Here, we elucidate a mechanism of juxtamembrane inhibition that shifts the equilibrium of VEGFR1 towards the inactive state, rendering it an inefficient kinase. The juxtamembrane inhibition of VEGFR1 suppresses its basal phosphorylation even at high receptor concentrations and transiently stabilizes tyrosine phosphorylation after ligand stimulation. We conclude that a subtle imbalance in phosphatase activation or removing juxtamembrane inhibition is sufficient to induce ligand-independent activation of VEGFR1 and sustain tyrosine phosphorylation.
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Affiliation(s)
- Manas Pratim Chakraborty
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India
| | - Diptatanu Das
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India
| | - Purav Mondal
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India
| | - Pragya Kaul
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India
| | - Soumi Bhattacharyya
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India
| | - Prosad Kumar Das
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India
| | - Rahul Das
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India.
- Centre for Advanced Functional Materials, Indian Institute of Science Education and Research Kolkata, Mohanpur campus, Mohanpur, 741246, India.
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5
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Sarabipour S, Kinghorn K, Quigley KM, Kovacs-Kasa A, Annex BH, Bautch VL, Mac Gabhann F. Trafficking dynamics of VEGFR1, VEGFR2, and NRP1 in human endothelial cells. PLoS Comput Biol 2024; 20:e1011798. [PMID: 38324585 PMCID: PMC10878527 DOI: 10.1371/journal.pcbi.1011798] [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: 04/13/2023] [Revised: 02/20/2024] [Accepted: 01/03/2024] [Indexed: 02/09/2024] Open
Abstract
The vascular endothelial growth factor (VEGF) family of cytokines are key drivers of blood vessel growth and remodeling. These ligands act via multiple VEGF receptors (VEGFR) and co-receptors such as Neuropilin (NRP) expressed on endothelial cells. These membrane-associated receptors are not solely expressed on the cell surface, they move between the surface and intracellular locations, where they can function differently. The location of the receptor alters its ability to 'see' (access and bind to) its ligands, which regulates receptor activation; location also alters receptor exposure to subcellularly localized phosphatases, which regulates its deactivation. Thus, receptors in different subcellular locations initiate different signaling, both in terms of quantity and quality. Similarly, the local levels of co-expression of other receptors alters competition for ligands. Subcellular localization is controlled by intracellular trafficking processes, which thus control VEGFR activity; therefore, to understand VEGFR activity, we must understand receptor trafficking. Here, for the first time, we simultaneously quantify the trafficking of VEGFR1, VEGFR2, and NRP1 on the same cells-specifically human umbilical vein endothelial cells (HUVECs). We build a computational model describing the expression, interaction, and trafficking of these receptors, and use it to simulate cell culture experiments. We use new quantitative experimental data to parameterize the model, which then provides mechanistic insight into the trafficking and localization of this receptor network. We show that VEGFR2 and NRP1 trafficking is not the same on HUVECs as on non-human ECs; and we show that VEGFR1 trafficking is not the same as VEGFR2 trafficking, but rather is faster in both internalization and recycling. As a consequence, the VEGF receptors are not evenly distributed between the cell surface and intracellular locations, with a very low percentage of VEGFR1 being on the cell surface, and high levels of NRP1 on the cell surface. Our findings have implications both for the sensing of extracellular ligands and for the composition of signaling complexes at the cell surface versus inside the cell.
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Affiliation(s)
- Sarvenaz Sarabipour
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Karina Kinghorn
- Curriculum in Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Kaitlyn M. Quigley
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Anita Kovacs-Kasa
- Vascular Biology Center and Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, United States of America
| | - Brian H. Annex
- Vascular Biology Center and Department of Medicine, Medical College of Georgia at Augusta University, Augusta, Georgia, United States of America
| | - Victoria L. Bautch
- Curriculum in Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina, United States of America
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina, United States of America
- McAllister Heart Institute, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Feilim Mac Gabhann
- Institute for Computational Medicine and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, United States of America
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6
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Azzouzi M, Azougagh O, Ouchaoui AA, El hadad SE, Mazières S, Barkany SE, Abboud M, Oussaid A. Synthesis, Characterizations, and Quantum Chemical Investigations on Imidazo[1,2- a]pyrimidine-Schiff Base Derivative: ( E)-2-Phenyl- N-(thiophen-2-ylmethylene)imidazo[1,2- a]pyrimidin-3-amine. ACS OMEGA 2024; 9:837-857. [PMID: 38222514 PMCID: PMC10785637 DOI: 10.1021/acsomega.3c06841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/27/2023] [Accepted: 11/17/2023] [Indexed: 01/16/2024]
Abstract
In this study, (E)-2-phenyl-N-(thiophen-2-ylmethylene)imidazo[1,2-a]pyrimidin-3-amine (3) is synthesized, and detailed spectral characterizations using 1H NMR, 13C NMR, mass, and Fourier transform infrared (FT-IR) spectroscopy were performed. The optimized geometry was computed using the density functional theory method at the B3LYP/6-311++G(d,p) basis set. The theoretical FT-IR and NMR (1H and 13C) analysis are agreed to validate the structural assignment made for (3). Frontier molecular orbitals, molecular electrostatic potential, Mulliken atomic charge, electron localization function, localized orbital locator, natural bond orbital, nonlinear optical, Fukui functions, and quantum theory of atoms in molecules analyses are undertaken and meticulously interpreted, providing profound insights into the molecular nature and behaviors. In addition, ADMET and drug-likeness studies were carried out and investigated. Furthermore, molecular docking and molecular dynamics simulations have been studied, indicating that this is an ideal molecule to develop as a potential vascular endothelial growth factor receptor-2 inhibitor.
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Affiliation(s)
- Mohamed Azzouzi
- Laboratory
of Molecular Chemistry, Materials and Environment (LCM2E), Department
of Chemistry, Multidisciplinary Faculty of Nador, University Mohamed I, Nador 60700, Morocco
| | - Omar Azougagh
- Laboratory
of Molecular Chemistry, Materials and Environment (LCM2E), Department
of Chemistry, Multidisciplinary Faculty of Nador, University Mohamed I, Nador 60700, Morocco
| | - Abderrahim Ait Ouchaoui
- Laboratory
of Medical Biotechnology (MedBiotech), Bionova Research Center, Medical
and Pharmacy School, Mohammed V University, Agdal, Rabat B.P 8007, Morocco
| | - Salah eddine El hadad
- Laboratory
of Medical Biotechnology (MedBiotech), Bionova Research Center, Medical
and Pharmacy School, Mohammed V University, Agdal, Rabat B.P 8007, Morocco
| | - Stéphane Mazières
- Laboratory
of IMRCP, University Paul Sabatier, CNRS
UMR 5623, 118 route de Narbonne, Toulouse 31062, France
| | - Soufian El Barkany
- Laboratory
of Molecular Chemistry, Materials and Environment (LCM2E), Department
of Chemistry, Multidisciplinary Faculty of Nador, University Mohamed I, Nador 60700, Morocco
| | - Mohamed Abboud
- Catalysis
Research Group (CRG), Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Adyl Oussaid
- Laboratory
of Molecular Chemistry, Materials and Environment (LCM2E), Department
of Chemistry, Multidisciplinary Faculty of Nador, University Mohamed I, Nador 60700, Morocco
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7
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Wan T, Zhang FS, Qin MY, Jiang HR, Zhang M, Qu Y, Wang YL, Zhang PX. Growth factors: Bioactive macromolecular drugs for peripheral nerve injury treatment - Molecular mechanisms and delivery platforms. Biomed Pharmacother 2024; 170:116024. [PMID: 38113623 DOI: 10.1016/j.biopha.2023.116024] [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: 10/31/2023] [Revised: 12/05/2023] [Accepted: 12/14/2023] [Indexed: 12/21/2023] Open
Abstract
Bioactive macromolecular drugs known as Growth Factors (GFs), approved by the Food and Drug Administration (FDA), have found successful application in clinical practice. They hold significant promise for addressing peripheral nerve injuries (PNIs). Peripheral nerve guidance conduits (NGCs) loaded with GFs, in the context of tissue engineering, can ensure sustained and efficient release of these bioactive compounds. This, in turn, maintains a stable, long-term, and effective GF concentration essential for treating damaged peripheral nerves. Peripheral nerve regeneration is a complex process that entails the secretion of various GFs. Following PNI, GFs play a pivotal role in promoting nerve cell growth and survival, axon and myelin sheath regeneration, cell differentiation, and angiogenesis. They also regulate the regenerative microenvironment, stimulate plasticity changes post-nerve injury, and, consequently, expedite nerve structure and function repair. Both exogenous and endogenous GFs, including NGF, BDNF, NT-3, GDNF, IGF-1, bFGF, and VEGF, have been successfully loaded onto NGCs using techniques like physical adsorption, blend doping, chemical covalent binding, and engineered transfection. These approaches have effectively promoted the repair of peripheral nerves. Numerous studies have demonstrated similar tissue functional therapeutic outcomes compared to autologous nerve transplantation. This evidence underscores the substantial clinical application potential of GFs in the domain of peripheral nerve repair. In this article, we provide an overview of GFs in the context of peripheral nerve regeneration and drug delivery systems utilizing NGCs. Looking ahead, commercial materials for peripheral nerve repair hold the potential to facilitate the effective regeneration of damaged peripheral nerves and maintain the functionality of distant target organs through the sustained release of GFs.
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Affiliation(s)
- Teng Wan
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Feng-Shi Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Ming-Yu Qin
- Suzhou Medical College, Soochow University, Suzhou 215026, China
| | - Hao-Ran Jiang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Meng Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Yang Qu
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Yi-Lin Wang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China.
| | - Pei-Xun Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China; Peking University People's Hospital Qingdao Hospital, Qingdao 266000, China.
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8
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Dasgupta A, Ngo HT, Tschoerner D, Touret N, da Rocha-Azevedo B, Jaqaman K. Multiscale imaging and quantitative analysis of plasma membrane protein-cortical actin interplay. Biophys J 2023; 122:3798-3815. [PMID: 37571825 PMCID: PMC10541498 DOI: 10.1016/j.bpj.2023.08.007] [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: 01/27/2023] [Revised: 05/19/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023] Open
Abstract
The spatiotemporal organization of cell surface receptors is important for cell signaling. Cortical actin (CA), the subset of the actin cytoskeleton subjacent to the plasma membrane (PM), plays a large role in cell surface receptor organization. However, this has been shown largely through actin perturbation experiments, which raise concerns of nonspecific effects and preclude quantification of actin architecture and dynamics under unperturbed conditions. These limitations make it challenging to predict how changes in CA properties can affect receptor organization. To derive direct relationships between the architecture and dynamics of CA and the spatiotemporal organization of PM proteins, including cell surface receptors, we developed a multiscale imaging and computational analysis framework based on the integration of single-molecule imaging (SMI) of PM proteins and fluorescent speckle microscopy (FSM) of CA (combined: SMI-FSM) in the same live cell. SMI-FSM revealed differential relationships between PM proteins and CA based on the PM proteins' actin binding ability, diffusion type, and local CA density. Combining SMI-FSM with subcellular region analysis revealed differences in CA dynamics that were predictive of differences in PM protein mobility near ruffly cell edges versus closer to the cell center. SMI-FSM also highlighted the complexity of cell-wide actin perturbation, where we found that global changes in actin properties caused by perturbation were not necessarily reflected in the CA properties near PM proteins, and that the changes in PM protein properties upon perturbation varied based on the local CA environment. Given the widespread use of SMI as a method to study the spatiotemporal organization of PM proteins and the versatility of SMI-FSM, we expect it to be widely applicable to enable future investigation of the influence of CA architecture and dynamics on different PM proteins, especially in the context of actin-dependent cellular processes.
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Affiliation(s)
- Aparajita Dasgupta
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Huong-Tra Ngo
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Deryl Tschoerner
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Nicolas Touret
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Bruno da Rocha-Azevedo
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Khuloud Jaqaman
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas; Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center, Dallas, Texas.
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9
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Schirripa Spagnolo C, Moscardini A, Amodeo R, Beltram F, Luin S. Quantitative determination of fluorescence labeling implemented in cell cultures. BMC Biol 2023; 21:190. [PMID: 37697318 PMCID: PMC10496409 DOI: 10.1186/s12915-023-01685-0] [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: 11/29/2022] [Accepted: 08/18/2023] [Indexed: 09/13/2023] Open
Abstract
BACKGROUND Labeling efficiency is a crucial parameter in fluorescence applications, especially when studying biomolecular interactions. Current approaches for estimating the yield of fluorescent labeling have critical drawbacks that usually lead them to be inaccurate or not quantitative. RESULTS We present a method to quantify fluorescent-labeling efficiency that addresses the critical issues marring existing approaches. The method operates in the same conditions of the target experiments by exploiting a ratiometric evaluation with two fluorophores used in sequential reactions. We show the ability of the protocol to extract reliable quantification for different fluorescent probes, reagents concentrations, and reaction timing and to optimize labeling performance. As paradigm, we consider the labeling of the membrane-receptor TrkA through 4'-phosphopantetheinyl transferase Sfp in living cells, visualizing the results by TIRF microscopy. This investigation allows us to find conditions for demanding single and multi-color single-molecule studies requiring high degrees of labeling. CONCLUSIONS The developed method allows the quantitative determination and the optimization of staining efficiency in any labeling strategy based on stable reactions.
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Affiliation(s)
| | - Aldo Moscardini
- NEST Laboratory, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Rosy Amodeo
- NEST Laboratory, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
- Present address: Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, Pieve Emanuele, 20072, Milan, Italy
| | - Fabio Beltram
- NEST Laboratory, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
- NEST Laboratory, Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Stefano Luin
- NEST Laboratory, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy.
- NEST Laboratory, Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56127, Pisa, Italy.
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10
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Catapano C, Rahm JV, Omer M, Teodori L, Kjems J, Dietz MS, Heilemann M. Biased activation of the receptor tyrosine kinase HER2. Cell Mol Life Sci 2023; 80:158. [PMID: 37208479 DOI: 10.1007/s00018-023-04806-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/20/2023] [Accepted: 05/11/2023] [Indexed: 05/21/2023]
Abstract
HER2 belongs to the ErbB sub-family of receptor tyrosine kinases and regulates cellular proliferation and growth. Different from other ErbB receptors, HER2 has no known ligand. Activation occurs through heterodimerization with other ErbB receptors and their cognate ligands. This suggests several possible activation paths of HER2 with ligand-specific, differential response, which has so far remained unexplored. Using single-molecule tracking and the diffusion profile of HER2 as a proxy for activity, we measured the activation strength and temporal profile in live cells. We found that HER2 is strongly activated by EGFR-targeting ligands EGF and TGFα, yet with a distinguishable temporal fingerprint. The HER4-targeting ligands EREG and NRGβ1 showed weaker activation of HER2, a preference for EREG, and a delayed response to NRGβ1. Our results indicate a selective ligand response of HER2 that may serve as a regulatory element. Our experimental approach is easily transferable to other membrane receptors targeted by multiple ligands.
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Affiliation(s)
- Claudia Catapano
- Institute of Physical and Theoretical Chemistry, Goethe-University Frankfurt, Max-Von-Laue-Str. 7, 60438, Frankfurt, Germany
| | - Johanna V Rahm
- Institute of Physical and Theoretical Chemistry, Goethe-University Frankfurt, Max-Von-Laue-Str. 7, 60438, Frankfurt, Germany
| | - Marjan Omer
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
- Center for Cellular Signal Patterns (CellPAT), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Laura Teodori
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
- Center for Cellular Signal Patterns (CellPAT), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Jørgen Kjems
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
- Center for Cellular Signal Patterns (CellPAT), Aarhus University, Gustav Wieds Vej 14, 8000, Aarhus C, Denmark
| | - Marina S Dietz
- Institute of Physical and Theoretical Chemistry, Goethe-University Frankfurt, Max-Von-Laue-Str. 7, 60438, Frankfurt, Germany
| | - Mike Heilemann
- Institute of Physical and Theoretical Chemistry, Goethe-University Frankfurt, Max-Von-Laue-Str. 7, 60438, Frankfurt, Germany.
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11
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Dasgupta A, Ngo HT, Tschoerner D, Touret N, da Rocha-Azevedo B, Jaqaman K. Multiscale imaging and quantitative analysis of plasma membrane protein-cortical actin interplay. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.22.525112. [PMID: 36747866 PMCID: PMC9900770 DOI: 10.1101/2023.01.22.525112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The spatiotemporal organization of cell surface receptors is important for cell signaling. Cortical actin (CA), the subset of the actin cytoskeleton subjacent to the plasma membrane (PM), plays a large role in cell surface receptor organization. This was however shown largely through actin perturbation experiments, which raise concerns of nonspecific effects and preclude quantification of actin architecture and dynamics under unperturbed conditions. These limitations make it challenging to predict how changes in CA properties can affect receptor organization. To derive direct relationships between the architecture and dynamics of CA and the spatiotemporal organization of PM proteins, including cell surface receptors, we developed a multiscale imaging and computational analysis framework based on the integration of single-molecule imaging (SMI) of PM proteins and fluorescent speckle microscopy (FSM) of CA (combined: SMI-FSM) in the same live cell. SMI-FSM revealed differential relationships between PM proteins and CA based on the PM proteins’ actin binding ability, diffusion type and local CA density. It also highlighted the complexity of cell wide actin perturbation, where we found that global changes in actin properties caused by perturbation were not necessarily reflected in the CA properties near PM proteins, and the changes in PM protein properties upon perturbation varied based on the local CA environment. Given the widespread use of SMI as a method to study the spatiotemporal organization of PM proteins and the versatility of SMI-FSM, we expect it to be widely applicable to enable future investigation of the influence of CA architecture and dynamics on different PM proteins, especially in the context of actin-dependent cellular processes, such as cell migration. Significance Plasma membrane protein organization, an important factor for shaping cellular behaviors, is influenced by cortical actin, the subset of the actin cytoskeleton near the plasma membrane. Yet it is challenging to directly and quantitatively probe this influence. Here, we developed an imaging and analysis approach that combines single-molecule imaging, fluorescent speckle microscopy and computational statistical analysis to characterize and correlate the spatiotemporal organization of plasma membrane proteins and cortical actin. Our approach revealed different relationships between different proteins and cortical actin, and highlighted the complexity of interpreting cell wide actin perturbation experiments. We expect this approach to be widely used to study the influence of cortical actin on different plasma membrane components, especially in actin-dependent processes.
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Affiliation(s)
- Aparajita Dasgupta
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Huong-Tra Ngo
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Deryl Tschoerner
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Nicolas Touret
- Department of Biochemistry, University of Alberta; Edmonton, AB, Canada
| | - Bruno da Rocha-Azevedo
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
| | - Khuloud Jaqaman
- Department of Biophysics, University of Texas Southwestern Medical Center; Dallas, TX, USA
- Lyda Hill Department of Bioinformatics, University of Texas Southwestern Medical Center; Dallas, TX, USA
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12
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Park J, Jin S, Jang J, Seo D. Single-Molecule Imaging of Membrane Proteins on Vascular Endothelial Cells. J Lipid Atheroscler 2023; 12:58-72. [PMID: 36761059 PMCID: PMC9884557 DOI: 10.12997/jla.2023.12.1.58] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 01/26/2023] Open
Abstract
Transporting substances such as gases, nutrients, waste, and cells is the primary function of blood vessels. Vascular cells use membrane proteins to perform crucial endothelial functions, including molecular transport, immune cell infiltration, and angiogenesis. A thorough understanding of these membrane receptors from a clinical perspective is warranted to gain insights into the pathogenesis of vascular diseases and to develop effective methods for drug delivery through the vascular endothelium. This review summarizes state-of-the-art single-molecule imaging techniques, such as super-resolution microscopy, single-molecule tracking, and protein-protein interaction analysis, for observing and studying membrane proteins. Furthermore, recent single-molecule studies of membrane proteins such as cadherins, integrins, caveolins, transferrin receptors, vesicle-associated protein-1, and vascular endothelial growth factor receptor are discussed.
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Affiliation(s)
- Jiseong Park
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, Korea
| | - Siwoo Jin
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, Korea
| | - Juhee Jang
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, Korea
| | - Daeha Seo
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu, Korea
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13
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Vega-Lugo J, da Rocha-Azevedo B, Dasgupta A, Jaqaman K. Analysis of conditional colocalization relationships and hierarchies in three-color microscopy images. J Cell Biol 2022; 221:213216. [PMID: 35552363 PMCID: PMC9111757 DOI: 10.1083/jcb.202106129] [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: 06/21/2021] [Revised: 03/15/2022] [Accepted: 04/25/2022] [Indexed: 01/07/2023] Open
Abstract
Colocalization analysis of multicolor microscopy images is a cornerstone approach in cell biology. It provides information on the localization of molecules within subcellular compartments and allows the interrogation of known molecular interactions in their cellular context. However, almost all colocalization analyses are designed for two-color images, limiting the type of information that they reveal. Here, we describe an approach, termed "conditional colocalization analysis," for analyzing the colocalization relationships between three molecular entities in three-color microscopy images. Going beyond the question of whether colocalization is present or not, it addresses the question of whether the colocalization between two entities is influenced, positively or negatively, by their colocalization with a third entity. We benchmark the approach and showcase its application to investigate receptor-downstream adaptor colocalization relationships in the context of functionally relevant plasma membrane locations. The software for conditional colocalization analysis is available at https://github.com/kjaqaman/conditionalColoc.
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Affiliation(s)
- Jesus Vega-Lugo
- Department of Biophysics, UT Southwestern Medical Center, Dallas, TX
| | | | | | - Khuloud Jaqaman
- Department of Biophysics, UT Southwestern Medical Center, Dallas, TX,Lyda Hill Department of Bioinformatics, UT Southwestern Medical Center, Dallas, TX,Correspondence to Khuloud Jaqaman:
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14
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Sotolongo Bellón J, Birkholz O, Richter CP, Eull F, Kenneweg H, Wilmes S, Rothbauer U, You C, Walter MR, Kurre R, Piehler J. Four-color single-molecule imaging with engineered tags resolves the molecular architecture of signaling complexes in the plasma membrane. CELL REPORTS METHODS 2022; 2:100165. [PMID: 35474965 PMCID: PMC9017138 DOI: 10.1016/j.crmeth.2022.100165] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/19/2021] [Accepted: 01/13/2022] [Indexed: 12/22/2022]
Abstract
Localization and tracking of individual receptors by single-molecule imaging opens unique possibilities to unravel the assembly and dynamics of signaling complexes in the plasma membrane. We present a comprehensive workflow for imaging and analyzing receptor diffusion and interaction in live cells at single molecule level with up to four colors. Two engineered, monomeric GFP variants, which are orthogonally recognized by anti-GFP nanobodies, are employed for efficient and selective labeling of target proteins in the plasma membrane with photostable fluorescence dyes. This labeling technique enables us to quantitatively resolve the stoichiometry and dynamics of the interferon-γ (IFNγ) receptor signaling complex in the plasma membrane of living cells by multicolor single-molecule imaging. Based on versatile spatial and spatiotemporal correlation analyses, we identify ligand-induced receptor homo- and heterodimerization. Multicolor single-molecule co-tracking and quantitative single-molecule Förster resonance energy transfer moreover reveals transient assembly of IFNγ receptor heterotetramers and confirms its structural architecture.
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Affiliation(s)
- Junel Sotolongo Bellón
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Oliver Birkholz
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Christian P. Richter
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Florian Eull
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Hella Kenneweg
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Stephan Wilmes
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
- Division of Cell Signalling and Immunology, University of Dundee, School of Life Sciences, Dundee, UK
| | - Ulrich Rothbauer
- Pharmaceutical Biotechnology, Eberhard-Karls-University, Tübingen, Germany
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
| | - Changjiang You
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Mark R. Walter
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Rainer Kurre
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
| | - Jacob Piehler
- Department of Biology and Center for Cellular Nanoanalytics (CellNanOs), Osnabrück University, Osnabrück, Germany
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15
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Alfonzo-Méndez MA, Sochacki KA, Strub MP, Taraska JW. Dual clathrin and integrin signaling systems regulate growth factor receptor activation. Nat Commun 2022; 13:905. [PMID: 35173166 PMCID: PMC8850434 DOI: 10.1038/s41467-022-28373-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/18/2022] [Indexed: 12/20/2022] Open
Abstract
The crosstalk between growth factor and adhesion receptors is key for cell growth and migration. In pathological settings, these receptors are drivers of cancer. Yet, how growth and adhesion signals are spatially organized and integrated is poorly understood. Here we use quantitative fluorescence and electron microscopy to reveal a mechanism where flat clathrin lattices partition and activate growth factor signals via a coordinated response that involves crosstalk between epidermal growth factor receptor (EGFR) and the adhesion receptor β5-integrin. We show that ligand-activated EGFR, Grb2, Src, and β5-integrin are captured by clathrin coated-structures at the plasma membrane. Clathrin structures dramatically grow in response to EGF into large flat plaques and provide a signaling platform that link EGFR and β5-integrin through Src-mediated phosphorylation. Disrupting this EGFR/Src/β5-integrin axis prevents both clathrin plaque growth and dampens receptor signaling. Our study reveals a reciprocal regulation between clathrin lattices and two different receptor systems to coordinate and enhance signaling. These findings have broad implications for the regulation of growth factor signaling, adhesion, and endocytosis.
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Affiliation(s)
- Marco A Alfonzo-Méndez
- Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 50 South Drive, Building 50, Bethesda, MD, 20892, USA
| | - Kem A Sochacki
- Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 50 South Drive, Building 50, Bethesda, MD, 20892, USA
| | - Marie-Paule Strub
- Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 50 South Drive, Building 50, Bethesda, MD, 20892, USA
| | - Justin W Taraska
- Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 50 South Drive, Building 50, Bethesda, MD, 20892, USA.
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16
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Choi HJ, Wang C, Pan X, Jang J, Cao M, Brazzo JA, Bae Y, Lee K. Emerging machine learning approaches to phenotyping cellular motility and morphodynamics. Phys Biol 2021; 18:10.1088/1478-3975/abffbe. [PMID: 33971636 PMCID: PMC9131244 DOI: 10.1088/1478-3975/abffbe] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 05/10/2021] [Indexed: 12/22/2022]
Abstract
Cells respond heterogeneously to molecular and environmental perturbations. Phenotypic heterogeneity, wherein multiple phenotypes coexist in the same conditions, presents challenges when interpreting the observed heterogeneity. Advances in live cell microscopy allow researchers to acquire an unprecedented amount of live cell image data at high spatiotemporal resolutions. Phenotyping cellular dynamics, however, is a nontrivial task and requires machine learning (ML) approaches to discern phenotypic heterogeneity from live cell images. In recent years, ML has proven instrumental in biomedical research, allowing scientists to implement sophisticated computation in which computers learn and effectively perform specific analyses with minimal human instruction or intervention. In this review, we discuss how ML has been recently employed in the study of cell motility and morphodynamics to identify phenotypes from computer vision analysis. We focus on new approaches to extract and learn meaningful spatiotemporal features from complex live cell images for cellular and subcellular phenotyping.
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Affiliation(s)
- Hee June Choi
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, United States of America
- Vascular Biology Program and Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, United States of America
| | - Chuangqi Wang
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, United States of America
- Present address. Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xiang Pan
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, United States of America
- Vascular Biology Program and Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, United States of America
| | - Junbong Jang
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, United States of America
- Vascular Biology Program and Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, United States of America
| | - Mengzhi Cao
- Data Science Program, Worcester Polytechnic Institute, Worcester, MA 01609, United States of America
| | - Joseph A Brazzo
- Department of Pathology and Anatomical Sciences, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, NY 14203, United States of America
| | - Yongho Bae
- Department of Pathology and Anatomical Sciences, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, State University of New York, Buffalo, NY 14203, United States of America
| | - Kwonmoo Lee
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609, United States of America
- Vascular Biology Program and Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115, United States of America
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