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Shumliakivska M, Luxán G, Hemmerling I, Scheller M, Li X, Müller-Tidow C, Schuhmacher B, Sun Z, Dendorfer A, Debes A, Glaser SF, Muhly-Reinholz M, Kirschbaum K, Hoffmann J, Nagel E, Puntmann VO, Cremer S, Leuschner F, Abplanalp WT, John D, Zeiher AM, Dimmeler S. DNMT3A clonal hematopoiesis-driver mutations induce cardiac fibrosis by paracrine activation of fibroblasts. Nat Commun 2024; 15:606. [PMID: 38242884 PMCID: PMC10799021 DOI: 10.1038/s41467-023-43003-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 10/27/2023] [Indexed: 01/21/2024] Open
Abstract
Hematopoietic mutations in epigenetic regulators like DNA methyltransferase 3 alpha (DNMT3A), play a pivotal role in driving clonal hematopoiesis of indeterminate potential (CHIP), and are associated with unfavorable outcomes in patients suffering from heart failure (HF). However, the precise interactions between CHIP-mutated cells and other cardiac cell types remain unknown. Here, we identify fibroblasts as potential partners in interactions with CHIP-mutated monocytes. We used combined transcriptomic data derived from peripheral blood mononuclear cells of HF patients, both with and without CHIP, and cardiac tissue. We demonstrate that inactivation of DNMT3A in macrophages intensifies interactions with cardiac fibroblasts and increases cardiac fibrosis. DNMT3A inactivation amplifies the release of heparin-binding epidermal growth factor-like growth factor, thereby facilitating activation of cardiac fibroblasts. These findings identify a potential pathway of DNMT3A CHIP-driver mutations to the initiation and progression of HF and may also provide a compelling basis for the development of innovative anti-fibrotic strategies.
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Affiliation(s)
- Mariana Shumliakivska
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany
| | - Guillermo Luxán
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany
| | - Inga Hemmerling
- Department of Internal Medicine III, University Hospital Heidelberg, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, 69120, Heidelberg, Germany
| | - Marina Scheller
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Xue Li
- Department of Internal Medicine III, University Hospital Heidelberg, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, 69120, Heidelberg, Germany
| | - Carsten Müller-Tidow
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Bianca Schuhmacher
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Zhengwu Sun
- Walter-Brendel-Centre of Experimental Medicine, Hospital of the Ludwig-Maximilians-University Munich, Marchioninistraße 68, 81377, München, Germany
| | - Andreas Dendorfer
- Walter-Brendel-Centre of Experimental Medicine, Hospital of the Ludwig-Maximilians-University Munich, Marchioninistraße 68, 81377, München, Germany
| | - Alisa Debes
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Simone-Franziska Glaser
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany
| | - Marion Muhly-Reinholz
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Klara Kirschbaum
- Department of Medicine, Cardiology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Jedrzej Hoffmann
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Institute of Experimental and Translational Cardiovascular Imaging, Centre for Cardiovascular Imaging, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Eike Nagel
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Institute of Experimental and Translational Cardiovascular Imaging, Centre for Cardiovascular Imaging, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Valentina O Puntmann
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Institute of Experimental and Translational Cardiovascular Imaging, Centre for Cardiovascular Imaging, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Sebastian Cremer
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany
- Department of Medicine, Cardiology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
| | - Florian Leuschner
- Department of Internal Medicine III, University Hospital Heidelberg, University of Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, 69120, Heidelberg, Germany
| | - Wesley Tyler Abplanalp
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany
| | - David John
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany
| | - Andreas M Zeiher
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany
| | - Stefanie Dimmeler
- Institute for Cardiovascular Regeneration, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany.
- German Center of Cardiovascular Research (DZHK), Partner Site Rhine/Main, 60439, Frankfurt am Main, Germany.
- Cardiopulmonary Institute (CPI), 60590, Frankfurt, Germany.
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Leberzammer J, Abplanalp WT, Glaser SF, Schumacher B, Merten M, Katschke MT, John D, Vehreschild M, Zeiher A, Dimmeler S, Cremer S. Atherosclerosis licenses for an exceeding immune response in COVID-19 disease. Eur Heart J 2022. [PMCID: PMC9619638 DOI: 10.1093/eurheartj/ehac544.3082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background COVID-19 is characterized by emergency hematopoiesis with a dysregulated myeloid compartment, comprising proinflammatory and immunosuppressive immune cells. Preexisting cardiovascular disease (CVD) is a major risk factor for severe and fatal COVID-19 outcomes. Individuals with atherosclerosis are known to have a proinflammatory immune cell phenotype. However, the mechanisms of how CVD causes worse outcomes during SARS-Cov2 infection remain unknown. Purpose To investigate the mechanisms of how immune cells link atherosclerosis to worse COVID-19 outcomes Methods Single-cell RNA sequencing (scRNA-seq) of peripheral blood mononuclear cells (PBMCs) derived from hospitalized SARS-Cov2 infected patients in an uncomplicated phase of the disease not requiring intensive-care treatment with (n=5) and without (n=6) preexisting atherosclerosis was performed. Results Baseline characteristics between the two groups were similar (atherosclerosis vs. no atherosclerosis: mean age 75 vs. 70 years, oxygen requirement 2.2 vs. 3.2 l/min, CRP 10.7 vs. 6.6 mg/dl, IL-6 61.6 vs. 60.6 pg/ml, all p>0.05). In accordance with previous COVID-19 scRNA-seq studies, we found low-density neutrophils, immature neutrophils, neutrophil like plasmablasts and mostly classical monocytes in the myeloid compartment. Low-density neutrophils from patients with atherosclerosis demonstrated an increased expression of proinflammatory (IL18R1 fold change (fc) = 3.3, IL18RAP fc=1.9, HMGB2 fc=1.8, S100A12 fc=1.7, TLR2 fc=1.5, S100A9 fc=1.4 C3AR1 fc=1.8, TLR4 fc= 1.4, all adjusted p-values <1.3x10–98) and immunosuppressive genes (IL1R2 fc=2.6, ARG1 fc=1.7, ANXA1 fc= 1.6, all adjusted p-values <4.1x10–67). Interestingly, we found an enrichment of proinflammatory COVID-19 specific neutrophil like plasmablasts in patients with atherosclerosis (p=0.049) with an increased expression of inflammatory genes (S100A12 fc=2.5, S100A9 fc=2.5, S100A8 fc=1.8, HMGB2 fc=2.8, IL18R1 fc=3.9 S100A10 fc=2, all adjusted p-values <1.1x10–54). In accordance, monocytes from patients with atherosclerosis showed an enrichment of inflammatory (S100A9 fc=1.6, NEAT1 fc=1.8, C3AR1 fc= 1.5, TLR2 fc= 1.5, IL13RA1 q=1.3, CCR2 fc=1.2, all p-values <1.3x10–60) and immunomodulatory genes (IL1R2 fc=3.5, CD163 fc=2.2, all adjusted p-values <2.7x10–87). Conclusions Our data show for the first time that patients with atherosclerosis have a dysregulated myeloid immune response already in the uncomplicated phase of SARS-CoV-2 infection. Upregulated genes and cell populations found in this study have previously been associated with severe COVID-19. Therefore, the enhanced inflammatory response may contribute to the worse outcome of patients with CVD and might be addressed by antiinflammatory drugs. Further efforts are needed to understand how atherosclerosis may control chromatin accessibility to predispose for an enhanced inflammatory response. Funding Acknowledgement Type of funding sources: Foundation. Main funding source(s): German Heart Foundation
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Affiliation(s)
- J Leberzammer
- Goethe University Hospital, Department of Medicine, Cardiology , Frankfurt , Germany
| | - W T Abplanalp
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - S F Glaser
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - B Schumacher
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - M Merten
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - M T Katschke
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - D John
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - M Vehreschild
- University Hospital Frankfurt, Department of Medicine, Infectious Diseases , Frankfurt , Germany
| | - A Zeiher
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - S Dimmeler
- Institute of Cardiovascular Regeneration , Frankfurt , Germany
| | - S Cremer
- University Hospital Frankfurt, Department of Medicine, Infectious Diseases , Frankfurt , Germany
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3
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Nicin L, Bruening RS, Kattih B, Glaser SF, Abplanalp WT, Schroeter SM, Arsalan M, Holubec T, Emrich F, Meder B, Reich C, Walther T, Zeiher AM, John D, Dimmeler S. The human cell atlas of the hypertrophic heart reveals impaired inter-cellular cross-talks. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
The pathophysiology of cardiac hypertrophy is multifactorial and is accompanied by the dysregulation of various signaling pathways contributing to cardiac dysfunction and heart failure. While the hypertrophic response of cardiomyocytes (CM) has been extensively studied, the interplay of CMs with the non-parenchymal cells in the heart is less explored. Here, we apply high-resolution transcriptomic analysis on single cell level allowing the identification of cellular responses and communication in the hypertrophic human heart.
Results
We analyzed single nuclei RNA sequencing data of cardiac tissues from five patients with aortic stenosis and cardiac hypertrophy and 13 matched healthy subjects. Bioinformatic data analysis of 88,536 nuclei followed by clustering led to the identification of specific heterogenic cell type signatures. Analyzing cell type specific gene expression signatures, we found the expected up-regulation of the cardiac stress MYH7 (4.15-fold), CMYA5 (4.89-fold) and XIRP2 (6.13-fold) in cardiomyocytes (CM) (all p<0.0001). Fibroblasts showed increased expression of genes associated with fibrosis and activation markers such as periostin (POSTN; 6.84-fold, p<0.0001). In-silico analysis of intercellular communication pathways revealed a striking downregulation of ligand-receptor interactions between CMs and other cells in hypertrophic compared to healthy controls indicating that CMs are less responsive to signals from fibroblasts and endothelial cells (ECs) in the hypertrophied heart. Particularly, CM showed reduced expression of receptor tyrosine kinases of the Ephrin family and FGF-family members. Specifically, Ephrin-B1 was significantly downregulated in CMs of the hypertrophic hearts (0.01-fold, p<0.0001). The down-regulation of Ephrin-B1 was additionally validated on protein level using histological sections of hypertrophic cardiomyopathy patients (n=6) versus healthy controls (n=5) (0.66-fold, p=0.02). In-vitro studies in neonatal cardiomyocytes further demonstrated that activation of the Ephrin-B1 receptor by the agonist Ephrin-B2 induced cardioprotective effects. Thus, Ephrin-B2 inhibited phenylephrine (PE) induced Nppb expression by 0.775-fold (vs. PE) and hypertrophic growth (0.774-fold reduction of cell size vs. PE). Similar findings were observed in PE-stimulated human cardiac organoids, which showed a 0.58-fold reduction of size in response to Ephrin-B2 treatments compared to PE alone.
Conclusion
Investigating the cross-talk in cardiac hypertrophy reveals novel disturbed communication signatures, with a striking reduction in the intercellular communication pathways of CMs. Reduced expression of receptors of the Ephrin family, particularly Ephrin-B1, in CM may prevent cardioprotective signaling by the agonist Ephrin-B2, which is highly expressed in ECs, leading to inhibition of cardioprotective cross-talk between ECs and CMs in the hypertrophic heart.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Dr. Rolf M. Schwiete StiftungDie Deutsche ForschungsgemeinschaftGerman Center for Cardiovascular Research
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Affiliation(s)
- L Nicin
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - R S Bruening
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - B Kattih
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - S F Glaser
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - W T Abplanalp
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - S M Schroeter
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - M Arsalan
- Goethe University Hospital, Department of Cardiac Surgery, Frankfurt am Main, Germany
| | - T Holubec
- Goethe University Hospital, Department of Cardiac Surgery, Frankfurt am Main, Germany
| | - F Emrich
- Goethe University Hospital, Department of Cardiac Surgery, Frankfurt am Main, Germany
| | - B Meder
- University Hospital, Institute for Cardiomyopathies, Heidelberg, Germany
| | - C Reich
- University Hospital, Institute for Cardiomyopathies, Heidelberg, Germany
| | - T Walther
- Goethe University Hospital, Department of Cardiac Surgery, Frankfurt am Main, Germany
| | - A M Zeiher
- Goethe University Hospital, Department of Cardiology, Frankfurt am Main, Germany
| | - D John
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
| | - S Dimmeler
- Johann Wolfgang Goethe University, Institute for Cardiovascular Regeneration, Frankfurt am Main, Germany
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4
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Hoffmann J, Luxán G, Abplanalp WT, Glaser SF, Rasper T, Fischer A, Muhly-Reinholz M, Potente M, Assmus B, John D, Zeiher AM, Dimmeler S. Post-myocardial infarction heart failure dysregulates the bone vascular niche. Nat Commun 2021; 12:3964. [PMID: 34172720 PMCID: PMC8233308 DOI: 10.1038/s41467-021-24045-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 05/20/2021] [Indexed: 11/22/2022] Open
Abstract
The regulation of bone vasculature by chronic diseases, such as heart failure is unknown. Here, we describe the effects of myocardial infarction and post-infarction heart failure on the bone vascular cell composition. We demonstrate an age-independent loss of type H endothelium in heart failure after myocardial infarction in both mice and humans. Using single-cell RNA sequencing, we delineate the transcriptional heterogeneity of human bone marrow endothelium, showing increased expression of inflammatory genes, including IL1B and MYC, in ischemic heart failure. Endothelial-specific overexpression of MYC was sufficient to induce type H bone endothelial cells, whereas inhibition of NLRP3-dependent IL-1β production partially prevented the post-myocardial infarction loss of type H vasculature in mice. These results provide a rationale for using anti-inflammatory therapies to prevent or reverse the deterioration of bone vascular function in ischemic heart disease.
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Affiliation(s)
- Jedrzej Hoffmann
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany
- Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
| | - Guillermo Luxán
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany
- Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Wesley Tyler Abplanalp
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany
- Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Simone-Franziska Glaser
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany
- Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Tina Rasper
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Ariane Fischer
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Marion Muhly-Reinholz
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Michael Potente
- Angiogenesis and Metabolism Laboratory, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
- Berlin Institute of Health (BIH) and Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Max Delbrück Center for Molecular Medicine (MDC), Berlin, Germany
| | - Birgit Assmus
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany
| | - David John
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany
- Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany
| | - Andreas Michael Zeiher
- Department of Cardiology, Center of Internal Medicine, Goethe University Frankfurt, Frankfurt, Germany
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany
- Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany
| | - Stefanie Dimmeler
- German Center for Cardiovascular Research DZHK, Frankfurt am Main, Germany.
- Cardiopulmonary Institute, Goethe University Frankfurt, Frankfurt, Germany.
- Institute of Cardiovascular Regeneration, Center of Molecular Medicine, Goethe University Frankfurt, Frankfurt, Germany.
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Hofmann D, Tenzer S, Bannwarth MB, Messerschmidt C, Glaser SF, Schild H, Landfester K, Mailänder V. Mass spectrometry and imaging analysis of nanoparticle-containing vesicles provide a mechanistic insight into cellular trafficking. ACS Nano 2014; 8:10077-10088. [PMID: 25244389 DOI: 10.1021/nn502754c] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Rational design of nanocarriers for drug delivery approaches requires an unbiased knowledge of uptake mechanisms and intracellular trafficking pathways. Here we dissected these processes using a quantitative proteomics approach. We isolated intracellular vesicles containing superparamagnetic iron oxide polystyrene nanoparticles and analyzed their protein composition by label-free quantitative mass spectrometry. The proteomic snapshot of organelle marker proteins revealed that an atypical macropinocytic-like mechanism mediated the entry of nanoparticles. We show that the entry mechanism is controlled by actin reorganization, atypical macropinocytic signaling, and ADP-ribosylation factor 1. Additionally, our proteomics data demonstrated a central role for multivesicular bodies and multilamellar lysosomes in trafficking and final nanoparticle storage. This was confirmed by confocal microscopy and cryo-TEM measurements. By quantitatively analyzing the protein composition of nanoparticle-containing vesicles, our study clearly defines the routes of nanoparticle entry, intracellular trafficking, and the proteomic milieu of a nanoparticle-containing vesicle.
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Affiliation(s)
- Daniel Hofmann
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
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