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Imbastari F, Dahlmann M, Sporbert A, Mattioli CC, Mari T, Scholz F, Timm L, Twamley S, Migotti R, Walther W, Dittmar G, Rehm A, Stein U. MACC1 regulates clathrin-mediated endocytosis and receptor recycling of transferrin receptor and EGFR in colorectal cancer. Cell Mol Life Sci 2021; 78:3525-3542. [PMID: 33469705 PMCID: PMC8038998 DOI: 10.1007/s00018-020-03734-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 11/16/2020] [Accepted: 12/08/2020] [Indexed: 12/12/2022]
Abstract
Metastasis Associated in Colon Cancer 1 (MACC1) is a novel prognostic, predictive and causal biomarker for tumor progression and metastasis in many cancer types, including colorectal cancer. Besides its clinical value, little is known about its molecular function. Its similarity to SH3BP4, involved in regulating uptake and recycling of transmembrane receptors, suggests a role of MACC1 in endocytosis. By exploring the MACC1 interactome, we identified the clathrin-mediated endocytosis (CME)-associated proteins CLTC, DNM2 and AP-2 as MACC1 binding partners. We unveiled a MACC1-dependent routing of internalized transferrin receptor towards recycling. Elevated MACC1 expression caused also the activation and internalization of EGFR, a higher rate of receptor recycling, as well as earlier and stronger receptor activation and downstream signaling. These effects are limited by deletion of CME-related protein interaction sites in MACC1. Thus, MACC1 regulates CME and receptor recycling, causing increased growth factor-mediated downstream signaling and cell proliferation. This novel mechanism unveils potential therapeutic intervention points restricting MACC1-driven metastasis.
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Affiliation(s)
- Francesca Imbastari
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin and Max-Delbrück-Center for Molecular Medicine Berlin in the Helmholtz-Association, Robert-Rössle-Straße 10, 13125, Berlin, Germany
| | - Mathias Dahlmann
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin and Max-Delbrück-Center for Molecular Medicine Berlin in the Helmholtz-Association, Robert-Rössle-Straße 10, 13125, Berlin, Germany. .,German Cancer Consortium (DKTK), Heidelberg, Germany.
| | - Anje Sporbert
- Advanced Light Microscopy, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Camilla Ciolli Mattioli
- Berlin Institute for Medical Systems Biology, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Tommaso Mari
- Proteome Dynamics, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Florian Scholz
- Tumor Immunology, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Lena Timm
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin and Max-Delbrück-Center for Molecular Medicine Berlin in the Helmholtz-Association, Robert-Rössle-Straße 10, 13125, Berlin, Germany
| | - Shailey Twamley
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin and Max-Delbrück-Center for Molecular Medicine Berlin in the Helmholtz-Association, Robert-Rössle-Straße 10, 13125, Berlin, Germany
| | | | - Wolfgang Walther
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin and Max-Delbrück-Center for Molecular Medicine Berlin in the Helmholtz-Association, Robert-Rössle-Straße 10, 13125, Berlin, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany
| | - Gunnar Dittmar
- Proteomics of Cellular Signaling, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Armin Rehm
- Tumor Immunology, Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
| | - Ulrike Stein
- Translational Oncology of Solid Tumors, Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin and Max-Delbrück-Center for Molecular Medicine Berlin in the Helmholtz-Association, Robert-Rössle-Straße 10, 13125, Berlin, Germany. .,German Cancer Consortium (DKTK), Heidelberg, Germany.
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Sankaran J, Karampatzakis A, Rice SA, Wohland T. Quantitative imaging and spectroscopic technologies for microbiology. FEMS Microbiol Lett 2019; 365:4953418. [PMID: 29718275 DOI: 10.1093/femsle/fny075] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/23/2018] [Indexed: 12/17/2022] Open
Abstract
Light microscopy has enabled the observation of the structure and organisation of biofilms. Typically, the contrast in an image obtained from light microscopy is given by the time-averaged intensity that is effective in visualising the overall structure. Technological advancements in light microscopy have led to the creation of techniques that not only provide a static intensity image of the biofilm, but also enable one to quantify various dynamic physicochemical properties of biomolecules in microbial biofilms. Such light microscopy-based techniques can be grouped into two main classes, those that are based on luminescence and those that are based on scattering. Here, we review the fundamentals and applications of luminescence and scattering-based techniques, specifically, fluorescence lifetime imaging, Förster resonance energy transfer, fluorescence correlation spectroscopy, fluorescence recovery after photobleaching, single-particle tracking, transient state imaging, and Brillouin and Raman microscopy. These techniques provide information about the abundance, interactions and mobility of various molecules in the biofilms and also properties of the local microenvironment at optical resolution. Further, one could use any of these techniques to probe the real-time changes in these physical parameters upon the addition of external agents or at different stages during the growth of biofilms.
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Affiliation(s)
- Jagadish Sankaran
- Departments of Biological Sciences and Chemistry, National University of Singapore, Singapore 117558, Singapore.,Centre for BioImaging Sciences, National University of Singapore, Singapore 117557, Singapore
| | - Andreas Karampatzakis
- Centre for BioImaging Sciences, National University of Singapore, Singapore 117557, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
| | - Scott A Rice
- Singapore Centre for Environmental Life Sciences Engineering and School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore.,ithree Institute, University of Technology, Sydney 2007, Australia
| | - Thorsten Wohland
- Departments of Biological Sciences and Chemistry, National University of Singapore, Singapore 117558, Singapore.,Centre for BioImaging Sciences, National University of Singapore, Singapore 117557, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117456, Singapore
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Tan JWY, Lee CH, Kopelman R, Wang X. Transient Triplet Differential (TTD) Method for Background Free Photoacoustic Imaging. Sci Rep 2018; 8:9290. [PMID: 29915177 PMCID: PMC6006254 DOI: 10.1038/s41598-018-27578-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 06/01/2018] [Indexed: 12/21/2022] Open
Abstract
With the capability of presenting endogenous tissue contrast or exogenous contrast agents in deep biological samples at high spatial resolution, photoacoustic (PA) imaging has shown significant potential for many preclinical and clinical applications. However, due to strong background signals from various intrinsic chromophores in biological tissue, such as hemoglobin, achieving highly sensitive PA imaging of targeting probes labeled by contrast agents has remained a challenge. In this study, we introduce a novel technique called transient triplet differential (TTD) imaging which allows for substantial reduction of tissue background signals. TTD imaging detects directly the triplet state absorption, which is a special characteristic of phosphorescence capable dyes not normally present among intrinsic chromophores of biological tissue. Thus, these triplet state absorption PA images can facilitate "true" background free molecular imaging. We prepared a known phosphorescent dye probe, methylene blue conjugated polyacrylamide nanoparticles, with peak absorption at 660 nm and peak lowest triplet state absorption at 840 nm. We find, through studies on phantoms and on an in vivo tumor model, that TTD imaging can generate a superior contrast-to-noise ratio, compared to other image enhancement techniques, through the removal of noise generated by strongly absorbing intrinsic chromophores, regardless of their identity.
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Affiliation(s)
- Joel W Y Tan
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, 48109, USA
| | - Chang H Lee
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, 48109, USA
| | - Raoul Kopelman
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, 48109, USA. .,Department of Chemistry, University of Michigan, Ann Arbor, Michigan, 48109, USA.
| | - Xueding Wang
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, 48109, USA. .,Department of Radiology, University of Michigan Medical School, Ann Arbor, Michigan, 48109, USA.
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Spielmann T, Xu L, Gad AKB, Johansson S, Widengren J. Transient state microscopy probes patterns of altered oxygen consumption in cancer cells. FEBS J 2014; 281:1317-1332. [PMID: 24418170 DOI: 10.1111/febs.12709] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 12/06/2013] [Accepted: 01/01/2014] [Indexed: 11/30/2022]
Abstract
Altered cellular metabolism plays an important role in many diseases, not least in many forms of cancer, where cellular metabolic pathways requiring lower oxygen consumption are often favored (the so-called Warburg effect). In this work, we have applied fluorescence-based transient state imaging and have exploited the environment sensitivity of long-lived dark states of fluorophores, in particular triplet state decay rates, to image the oxygen consumption of living cells. Our measurements can resolve differences in oxygen concentrations between different regions of individual cells, between different cell types, and also based on what metabolic pathways the cells use. In MCF-7 breast cancer cells, higher oxygen consumption can be detected when they rely on glutamine instead of glucose as their main metabolite, predominantly undergoing oxidative phosphorylation rather than glycolysis. By use of the high triplet yield dye Eosin Y the irradiance requirements during the measurements can be kept low. This reduces the instrumentation requirements, and harmful biological effects from high excitation doses can be avoided. Taken together, our imaging approach is widely applicable and capable of detecting subtle changes in oxygen consumption in live cells, stemming from the Warburg effect or reflecting other differences in the cellular metabolism. This may lead to new diagnostic means as well as advance our understanding of the interplay between cellular metabolism and major disease categories, such as cancer.
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Affiliation(s)
- Thiemo Spielmann
- Experimental Biomolecular Physics, Department of Applied Physics, Royal Institute of Technology, Stockholm, Sweden
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Geissbuehler M, Lasser T. How to display data by color schemes compatible with red-green color perception deficiencies. OPTICS EXPRESS 2013; 21:9862-74. [PMID: 23609692 DOI: 10.1364/oe.21.009862] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Visualization of data concerns most scientists. The use of color is required in order to display multidimensional information. In addition, color encoding a univariate image can improve the interpretation significantly. However up to 10% of the adult male population are affected by a red-green color perception deficiency which hampers the correct interpretation and appreciation of color encoded information. This work attempts to give guidelines on how to display a given dataset in a balanced manner. Three novel color maps are proposed providing readers with normal color perception a maximum of color contrast while being a good compromise for readers with color perception deficiencies.
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Affiliation(s)
- Matthias Geissbuehler
- Laboratoire d’Optique Biomédicale LOB, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 17, CH-1015 Lausanne, Switzerland.
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