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Uhl B, Hirn S, Immler R, Mildner K, Möckl L, Sperandio M, Bräuchle C, Reichel CA, Zeuschner D, Krombach F. The Endothelial Glycocalyx Controls Interactions of Quantum Dots with the Endothelium and Their Translocation across the Blood-Tissue Border. ACS Nano 2017; 11:1498-1508. [PMID: 28135073 DOI: 10.1021/acsnano.6b06812] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 06/06/2023]
Abstract
Advances in the engineering of nanoparticles (NPs), which represent particles of less than 100 nm in one external dimension, led to an increasing utilization of nanomaterials for biomedical purposes. A prerequisite for their use in diagnostic and therapeutic applications, however, is the targeted delivery to the site of injury. Interactions between blood-borne NPs and the vascular endothelium represent a critical step for nanoparticle delivery into diseased tissue. Here, we show that the endothelial glycocalyx, which constitutes a glycoprotein-polysaccharide meshwork coating the luminal surface of vessels, effectively controls interactions of carboxyl-functionalized quantum dots with the microvascular endothelium. Glycosaminoglycans of the endothelial glycocalyx were found to physically cover endothelial adhesion and signaling molecules, thereby preventing endothelial attachment, uptake, and translocation of these nanoparticles through different layers of the vessel wall. Conversely, degradation of the endothelial glycocalyx promoted interactions of these nanoparticles with microvascular endothelial cells under the pathologic condition of ischemia-reperfusion, thus identifying the injured endothelial glycocalyx as an essential element of the blood-tissue border facilitating the targeted delivery of nanomaterials to diseased tissue.
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Affiliation(s)
- Bernd Uhl
- Walter Brendel Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität München , 81377 Munich, Germany
| | - Stephanie Hirn
- Walter Brendel Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität München , 81377 Munich, Germany
| | - Roland Immler
- Walter Brendel Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität München , 81377 Munich, Germany
| | - Karina Mildner
- Electron Microscopy Unit, Max Planck Institute for Molecular Biomedicine , 48149 Münster, Germany
| | - Leonhard Möckl
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München , 81377 Munich, Germany
| | - Markus Sperandio
- Walter Brendel Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität München , 81377 Munich, Germany
| | - Christoph Bräuchle
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München , 81377 Munich, Germany
| | - Christoph A Reichel
- Walter Brendel Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität München , 81377 Munich, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, Klinikum der Universität München, Ludwig-Maximilians-Universität München , 81377 Munich, Germany
| | - Dagmar Zeuschner
- Electron Microscopy Unit, Max Planck Institute for Molecular Biomedicine , 48149 Münster, Germany
| | - Fritz Krombach
- Walter Brendel Centre of Experimental Medicine, Klinikum der Universität München, Ludwig-Maximilians-Universität München , 81377 Munich, Germany
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