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Britzen-Laurent N, Weidinger C, Stürzl M. Contribution of Blood Vessel Activation, Remodeling and Barrier Function to Inflammatory Bowel Diseases. Int J Mol Sci 2023; 24:ijms24065517. [PMID: 36982601 PMCID: PMC10051397 DOI: 10.3390/ijms24065517] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/09/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
Inflammatory bowel diseases (IBDs) consist of a group of chronic inflammatory disorders with a complex etiology, which represent a clinical challenge due to their often therapy-refractory nature. In IBD, inflammation of the intestinal mucosa is characterized by strong and sustained leukocyte infiltration, resulting in the loss of epithelial barrier function and subsequent tissue destruction. This is accompanied by the activation and the massive remodeling of mucosal micro-vessels. The role of the gut vasculature in the induction and perpetuation of mucosal inflammation is receiving increasing recognition. While the vascular barrier is considered to offer protection against bacterial translocation and sepsis after the breakdown of the epithelial barrier, endothelium activation and angiogenesis are thought to promote inflammation. The present review examines the respective pathological contributions of the different phenotypical changes observed in the microvascular endothelium during IBD, and provides an overview of potential vessel-specific targeted therapy options for the treatment of IBD.
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Affiliation(s)
- Nathalie Britzen-Laurent
- Division of Surgical Research, Department of Surgery, Translational Research Center, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany
- Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), 91054 Erlangen, Germany
- Correspondence:
| | - Carl Weidinger
- Department of Gastroenterology, Infectious Diseases and Rheumatology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany
| | - Michael Stürzl
- Comprehensive Cancer Center Erlangen-EMN (CCC ER-EMN), 91054 Erlangen, Germany
- Division of Molecular and Experimental Surgery, Translational Research Center, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany
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2
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Belcastro E, Rehman AU, Remila L, Park SH, Gong DS, Anton N, Auger C, Lefebvre O, Goetz JG, Collot M, Klymchenko AS, Vandamme TF, Schini-Kerth VB. Fluorescent nanocarriers targeting VCAM-1 for early detection of senescent endothelial cells. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 34:102379. [PMID: 33713860 DOI: 10.1016/j.nano.2021.102379] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/29/2021] [Accepted: 02/20/2021] [Indexed: 10/21/2022]
Abstract
Endothelial senescence has been identified as an early event in the development of endothelial dysfunction, a hallmark of cardiovascular disease. This study developed theranostic nanocarriers (NC) decorated with VCAM-1 antibodies (NC-VCAM-1) in order to target cell surface VCAM-1, which is overexpressed in senescent endothelial cells (ECs) for diagnostic and therapeutic purposes. Incubation of Ang II-induced premature senescent ECs or replicative senescent ECs with NC-VCAM-1 loaded with lipophilic fluorescent dyes showed higher fluorescence signals than healthy EC, which was dependent on the NC size and VCAM-1 antibodies concentration, and not observed following masking of VCAM-1. NC loaded with omega 3 polyunsaturated fatty acid (NC-EPA:DHA6:1) were more effective than native EPA:DHA 6:1 to prevent Ang II-induced VCAM-1 and p53 upregulation, and SA-β-galactosidase activity in coronary artery segments. These theranostic NC might be of interest to evaluate the extent and localization of endothelial senescence and to prevent pro-senescent endothelial responses.
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Affiliation(s)
- Eugenia Belcastro
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy
| | - Asad Ur Rehman
- University of Strasbourg, CNRS, CAMB UMR 7199, Strasbourg, France
| | - Lamia Remila
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy
| | - Sin-Hee Park
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy
| | - Dal Seong Gong
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy
| | - Nicolas Anton
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy; University of Strasbourg, CNRS, CAMB UMR 7199, Strasbourg, France
| | - Cyril Auger
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy
| | | | | | - Mayeul Collot
- CNRS UMR 7213, Laboratory of Biophotonics and Pharmacology, University of Strasbourg, Strasbourg, France
| | - Andrey S Klymchenko
- CNRS UMR 7213, Laboratory of Biophotonics and Pharmacology, University of Strasbourg, Strasbourg, France
| | - Thierry F Vandamme
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy; University of Strasbourg, CNRS, CAMB UMR 7199, Strasbourg, France
| | - Valérie B Schini-Kerth
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine, Faculty of Pharmacy.
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Molecular Imaging of Autoimmune Diseases. Mol Imaging 2021. [DOI: 10.1016/b978-0-12-816386-3.00055-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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4
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Ferreira-Duarte M, Sousa JB, Diniz C, Sousa T, Duarte-Araújo M, Morato M. Experimental and Clinical Evidence of Endothelial Dysfunction in Inflammatory Bowel Disease. Curr Pharm Des 2020; 26:3733-3747. [PMID: 32611296 DOI: 10.2174/1381612826666200701212414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 06/04/2020] [Indexed: 02/07/2023]
Abstract
The endothelium has a crucial role in proper hemodynamics. Inflammatory bowel disease (IBD) is mainly a chronic inflammatory condition of the gastrointestinal tract. However, considerable evidence points to high cardiovascular risk in patients with IBD. This review positions the basic mechanisms of endothelial dysfunction in the IBD setting (both clinical and experimental). Furthermore, we review the main effects of drugs used to treat IBD in endothelial (dys)function. Moreover, we leave challenging points for enlarging the therapeutic arsenal for IBD with new or repurposed drugs that target endothelial dysfunction besides inflammation.
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Affiliation(s)
| | | | - Carmen Diniz
- LAQV@REQUIMTE, University of Porto, Porto, Portugal
| | - Teresa Sousa
- Department of Biomedicine, Unit of Pharmacology and Therapeutics, Faculty of Medicine, University of Porto, Porto, Portugal
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5
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Lee HJ, Ehlerding EB, Cai W. Antibody-Based Tracers for PET/SPECT Imaging of Chronic Inflammatory Diseases. Chembiochem 2019; 20:422-436. [PMID: 30240550 PMCID: PMC6377337 DOI: 10.1002/cbic.201800429] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Indexed: 12/18/2022]
Abstract
Chronic inflammatory diseases are often progressive, resulting not only in physical damage to patients but also social and economic burdens, making early diagnosis of them critical. Nuclear medicine techniques can enhance the detection of inflammation by providing functional as well as anatomical information when combined with other modalities such as magnetic resonance imaging, computed tomography or ultrasonography. Although small molecules and peptides were mainly used for the treatment and imaging of chronic inflammatory diseases in the past, antibodies and their fragments have also been emerging for chronic inflammatory diseases as they show high specificity to their targets and can have various biological half-lives depending on how they are engineered. In addition, imaging with antibodies or their fragments can visualize the in vivo biodistribution of the probes or help monitor therapeutic responses, thereby providing physicians with a greater understanding of drug behavior in vivo and another means of monitoring their patients. In this review, we introduce various targets and radiolabeled antibody-based probes for the molecular imaging of chronic inflammatory diseases in preclinical and clinical studies. Targets can be classified into three different categories: 1) cell-adhesion molecules, 2) surface markers on immune cells, and 3) cytokines or enzymes. The limitations and future directions of using radiolabeled antibodies for imaging inflammatory diseases are also discussed.
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Affiliation(s)
- Hye Jin Lee
- Pharmaceutical Sciences Department, University of Wisconsin – Madison, Madison WI 53705, USA
| | - Emily B. Ehlerding
- Medical Physics Department, University of Wisconsin – Madison, Madison WI 53705, USA
| | - Weibo Cai
- Pharmaceutical Sciences Department, University of Wisconsin – Madison, Madison WI 53705, USA
- Medical Physics Department, University of Wisconsin – Madison, Madison WI 53705, USA
- Department of Radiology and Carbone Cancer Center, University of Wisconsin – Madison, Madison WI 53705, USA
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Single-Chain Variable Fragment Antibody of Vascular Cell Adhesion Molecule 1 as a Molecular Imaging Probe for Colitis Model Rabbit Investigation. CONTRAST MEDIA & MOLECULAR IMAGING 2019; 2019:2783519. [PMID: 30804723 PMCID: PMC6360587 DOI: 10.1155/2019/2783519] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 10/27/2018] [Accepted: 11/12/2018] [Indexed: 12/18/2022]
Abstract
Vascular cell adhesion molecule-1 (VCAM-1) can be a promising target for colitis study because of its critical role in inflammation development. Single-chain variable fragment (scFv) antibody presents fast blood clearance when served as an imaging probe. We applied the probe of 99mTc-scFv-VCAM-1 to colitis rabbit to examine its imaging performance. The colitis model rabbit was prepared, and a typical inflammatory lesion was confirmed in the colon. The probe of 99mTc-scFv-VCAM-1 was synthesized and injected into the model animal before imaging examination. Scintigraphy detected colitis lesions in both SPECT planar and SPECT/CT fused images, with higher target-to-nontarget ratios in the model group (2.71 ± 0.31) than those in the control group (1.12 ± 0.10). Biodistribution study determined tracer uptake in different organs, and autoradiography (ARG) confirmed probe accumulation in colon lesions. The uptake ratio of the model colon to the control colon was 4.71 ± 0.61 in quantitative analysis of the ARG regions of interest. Stronger VCAM-1 expression in the model colon than that in the control colon was confirmed by western blotting and immunohistochemistry. Our imaging study indicates molecular imaging with scFv-VCAM-1 as a promising way for inflammatory bowel disease diagnosis and evaluation.
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The Anti-Inflammatory Effect of Spray-Dried Plasma Is Mediated by a Reduction in Mucosal Lymphocyte Activation and Infiltration in a Mouse Model of Intestinal Inflammation. Nutrients 2016; 8:nu8100657. [PMID: 27782068 PMCID: PMC5084043 DOI: 10.3390/nu8100657] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 10/10/2016] [Accepted: 10/14/2016] [Indexed: 12/15/2022] Open
Abstract
Spray-dried preparations from porcine and bovine plasma can alleviate mucosal inflammation in experimental models and improve symptoms in patients with enteropathy. In rodents, dietary supplementation with porcine spray-dried plasma (SDP) attenuates intestinal inflammation and improves the epithelial barrier function during intestinal inflammation induced by Staphylococcus aureus enterotoxin B (SEB). The aim of this study was to discern the molecular mechanisms involved in the anti-inflammatory effects of SDP. Male C57BL/6 mice were fed with 8% SDP or control diet (based on milk proteins) for two weeks, from weaning until day 33. On day 32, the mice were given a SEB dose (i.p., 25 µg/mouse) or vehicle. SEB administration increased cell recruitment to mesenteric lymph nodes and the percentage of activated Th lymphocytes and SDP prevented these effects). SDP supplementation increased the expression of interleukin 10 (IL-10) or transforming growth factor- β (TGF-β) compared to the SEB group. The SEB challenge increased six-fold the expression of mucosal addressin cell adhesion molecule 1 (MAdCAM-1) and intercellular adhesion molecule 1 (ICAM-1); and these effects were attenuated by SDP supplementation. SEB also augmented NF-κB phosphorylation, an effect that was prevented by dietary SDP. Our results indicate that the anti-inflammatory effects of SDP involve the regulation of transcription factors and adhesion molecules that reduce intestinal cell infiltration and the degree of the inflammatory response.
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Kaaru E, Bianchi A, Wunder A, Rasche V, Stiller D. Molecular Imaging in Preclinical Models of IBD with Nuclear Imaging Techniques: State-of-the-Art and Perspectives. Inflamm Bowel Dis 2016; 22:2491-8. [PMID: 27580387 DOI: 10.1097/mib.0000000000000904] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Inflammatory bowel disease (IBD), which includes ulcerative colitis and Crohn's disease, is characterized by chronic unregulated inflammation of the intestinal mucosa of the gastrointestinal tract. To date, this pathology has no cure. Colonoscopy and biopsies are the current gold standard diagnostic tools. However, being a chronic disease, IBD requires continuous follow-up to check for disease progress, treatment response, and remission. Unfortunately, these 2 diagnostic procedures are invasive and generally unable to show the cellular and molecular changes that take place in vivo. In this context, it is clear that there is a strong need for optimized noninvasive imaging techniques able to overcome the aforementioned limitations. This review aims to bring to light the scientific advancements that have been achieved so far in nuclear medicine in relation to tracking of immune cells involved in the preclinical models of IBD. In particular, this review will explore the advantages and limitations of the radiopharmaceuticals that aim to track whole cells like neutrophils, those that involve the radiolabeling of immune cell substrates or available human IBD medical therapies, and those that aim to track cell signaling molecules (e.g., cytokines and cell adhesion molecules). After a detailed critical summary of the state-of-the art, the challenges and perspectives of molecular imaging applied to IBD studies will be analyzed. Special attention will be paid to the translational potential of the described techniques and on the potential impact of these innovative approaches on the drug discovery pipelines and their contribution to the evolution of personalized medicine.
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Affiliation(s)
- Eric Kaaru
- *Target Discovery Research Department, In-Vivo Imaging Laboratory, Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach an der Riss, Germany; †Translational Medicine and Clinical Pharmacology, Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach an der Riss, Germany; ‡Core Facility Small Animal Imaging, Ulm University, Ulm, Germany; and §Internal Medicine II, University Hospital Ulm, Ulm, Germany
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9
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Hong H, Chen F, Zhang Y, Cai W. New radiotracers for imaging of vascular targets in angiogenesis-related diseases. Adv Drug Deliv Rev 2014; 76:2-20. [PMID: 25086372 DOI: 10.1016/j.addr.2014.07.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Revised: 07/14/2014] [Accepted: 07/22/2014] [Indexed: 01/03/2023]
Abstract
Tremendous advances over the last several decades in positron emission tomography (PET) and single photon emission computed tomography (SPECT) allow for targeted imaging of molecular and cellular events in the living systems. Angiogenesis, a multistep process regulated by the network of different angiogenic factors, has attracted world-wide interests, due to its pivotal role in the formation and progression of different diseases including cancer, cardiovascular diseases (CVD), and inflammation. In this review article, we will summarize the recent progress in PET or SPECT imaging of a wide variety of vascular targets in three major angiogenesis-related diseases: cancer, cardiovascular diseases, and inflammation. Faster drug development and patient stratification for a specific therapy will become possible with the facilitation of PET or SPECT imaging and it will be critical for the maximum benefit of patients.
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Autio A, Jalkanen S, Roivainen A. Nuclear imaging of inflammation: homing-associated molecules as targets. EJNMMI Res 2013; 3:1. [PMID: 23281702 PMCID: PMC3557172 DOI: 10.1186/2191-219x-3-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 12/18/2012] [Indexed: 02/07/2023] Open
Abstract
The golden standard in nuclear medicine imaging of inflammation is the use of autologous radiolabeled leukocytes. Although their diagnostic accuracy is precise, the preparation of the leukocytes is both laborious and potentially hazardous for laboratory personnel. Molecules involved in leukocyte migration (homing-associated molecules) could serve as targets for the development of imaging agents for inflammation. An excellent target would be a molecule that is absent or expressed at low levels in healthy tissues, but is present or upregulated at the sites of inflammation. In this paper, we will review the literature concerning the use of homing-associated molecules as imaging targets. We will especially concentrate on vascular adhesion protein-1 due to the promising results regarding its use as a target for the imaging of inflammation.
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Affiliation(s)
- Anu Autio
- Turku PET Centre, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, Turku, 20521, Finland.
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11
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Cromer WE, Mathis JM, Granger DN, Chaitanya GV, Alexander JS. Role of the endothelium in inflammatory bowel diseases. World J Gastroenterol 2011; 17:578-93. [PMID: 21350707 PMCID: PMC3040330 DOI: 10.3748/wjg.v17.i5.578] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Revised: 06/29/2010] [Accepted: 07/06/2010] [Indexed: 02/06/2023] Open
Abstract
Inflammatory bowel diseases (IBD) are a complex group of diseases involving alterations in mucosal immunity and gastrointestinal physiology during both initiation and progressive phases of the disease. At the core of these alterations are endothelial cells, whose continual adjustments in structure and function coordinate vascular supply, immune cell emigration, and regulation of the tissue environment. Expansion of the endothelium in IBD (angiogenesis), mediated by inflammatory growth factors, cytokines and chemokines, is a hallmark of active gut disease and is closely related to disease severity. The endothelium in newly formed or inflamed vessels differs from that in normal vessels in the production of and response to inflammatory cytokines, growth factors, and adhesion molecules, altering coagulant capacity, barrier function and blood cell recruitment in injury. This review examines the roles of the endothelium in the initiation and propagation of IBD pathology and distinctive features of the intestinal endothelium contributing to these conditions.
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13
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Burtea C, Laurent S, Port M, Lancelot E, Ballet S, Rousseaux O, Toubeau G, Vander Elst L, Corot C, Muller RN. Magnetic Resonance Molecular Imaging of Vascular Cell Adhesion Molecule-1 Expression in Inflammatory Lesions Using a Peptide-Vectorized Paramagnetic Imaging Probe. J Med Chem 2009; 52:4725-42. [DOI: 10.1021/jm9002654] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Carmen Burtea
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, 24 Avenue du Champ de Mars, B-7000 Mons, Belgium
| | - Sophie Laurent
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, 24 Avenue du Champ de Mars, B-7000 Mons, Belgium
| | - Marc Port
- Guerbet, Research Center, 16-24 Rue Jean Chaptal, 93600 Aulnay-sous-Bois, France
| | - Eric Lancelot
- Guerbet, Research Center, 16-24 Rue Jean Chaptal, 93600 Aulnay-sous-Bois, France
| | - Sébastien Ballet
- Guerbet, Research Center, 16-24 Rue Jean Chaptal, 93600 Aulnay-sous-Bois, France
| | - Olivier Rousseaux
- Guerbet, Research Center, 16-24 Rue Jean Chaptal, 93600 Aulnay-sous-Bois, France
| | - Gérard Toubeau
- Laboratory of Histology, University of Mons, Pentagon 1B, 6 Avenue du Champ de Mars, B-7000 Mons, Belgium
| | - Luce Vander Elst
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, 24 Avenue du Champ de Mars, B-7000 Mons, Belgium
| | - Claire Corot
- Guerbet, Research Center, 16-24 Rue Jean Chaptal, 93600 Aulnay-sous-Bois, France
| | - Robert N. Muller
- Department of General, Organic and Biomedical Chemistry, NMR and Molecular Imaging Laboratory, University of Mons, 24 Avenue du Champ de Mars, B-7000 Mons, Belgium
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Affiliation(s)
- Mehran M Sadeghi
- Raymond and Beverly Sackler Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, CT, USA.
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Tsourkas A, Shinde-Patil VR, Kelly KA, Patel P, Wolley A, Allport JR, Weissleder R. In Vivo Imaging of Activated Endothelium Using an Anti-VCAM-1 Magnetooptical Probe. Bioconjug Chem 2005; 16:576-81. [PMID: 15898724 DOI: 10.1021/bc050002e] [Citation(s) in RCA: 132] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It has been suggested that vascular cell adhesion molecule-1 (VCAM-1) could serve as an early marker for inflammation of the endothelium. The ability to noninvasively image VCAM-1 could thus be a useful tool to diagnose a number of inflammatory diseases at early stages. Here we demonstrate that magnetooptical nanoparticles conjugated to anti-VCAM-1 antibodies can be used to specifically detect VCAM-1 expression on endothelial cells in culture and in vivo. Elevated VCAM-1 expression was detected on cultured murine heart endothelial cells by both fluorescence and magnetic resonance, while only basal expression levels were detected on murine dermal endothelial cells. Intravital microscopy of a murine inflammatory model injected with the VCAM-1 targeted nanoparticles revealed specific labeling of the activated endothelium, with labeling kinetics yielding a maximum vessel wall signal 6 h after injection. In contrast, nontargeted nanoparticles did not exhibit any specific labeling of the endothelium. These studies suggest that the developed nanoparticle would be useful for MR and optical detection of activated endothelium.
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Affiliation(s)
- Andrew Tsourkas
- Center for Molecular Imaging Research, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129-2060, USA
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Kelly KA, Allport JR, Tsourkas A, Shinde-Patil VR, Josephson L, Weissleder R. Detection of vascular adhesion molecule-1 expression using a novel multimodal nanoparticle. Circ Res 2005; 96:327-36. [PMID: 15653572 DOI: 10.1161/01.res.0000155722.17881.dd] [Citation(s) in RCA: 300] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Endothelial vascular adhesion molecule-1 (VCAM-1) is a critical component of the leukocyte-endothelial adhesion cascade, and its strict temporal and spatial regulation make it an ideal target for imaging and therapy. The goal of this study was to develop novel VCAM-1-targeted imaging agents detectable by MRI and fluorescence imaging using phage display-derived peptide sequences and multimodal nanoparticles (NPs). We hypothesized that VCAM-1-mediated cell internalization of phage display-selected peptides could be harnessed as an amplification strategy to chaperone and trap imaging agents inside VCAM-1-expressing cells, thus improving target-to-background ratios. To accomplish our goal, iterative phage display was performed on murine endothelium under physiological flow conditions to identify a family of VCAM-1-mediated cell-internalizing peptides. One specific sequence, containing the VHSPNKK motif that has homology to the alpha-chain of very late antigen (a known ligand for VCAM-1), was shown to bind VCAM-1 and block leukocyte-endothelial interactions. Compared with VCAM-1 monoclonal antibody, the peptide showed 12-fold higher target-to-background ratios. A VHSPNKK-modified magnetofluorescent NP (VNP) showed high affinity for endothelial cells expressing VCAM-1 but surprisingly low affinity for macrophages. In contrast, a control NP without VCAM-1-targeting sequences showed no affinity for endothelial cells. In vivo, VNP successfully identified VCAM-1-expressing endothelial cells in a murine tumor necrosis factor-alpha-induced inflammatory model and colocalized with VCAM-1-expressing cells in atherosclerotic lesions present in cholesterol-fed apolipoprotein E apoE-/- mice. These results indicate that: (1) small peptide sequences can significantly alter targeting of NPs, (2) the used amplification strategy of internalization results in high target-to-background ratios, and (3) this technology is useful for in vivo imaging of endothelial markers.
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Affiliation(s)
- Kimberly A Kelly
- Center for Molecular Imaging Research, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
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Abstract
This article discusses the potential for clinical translation of the large amount of information on the molecular basis of leukocyte-endothelial cell interactions that has been collected over the last twenty years. Areas of current interest include the identification of adhesion molecule expression in inflammation by diagnostic imaging, understanding variability in inflammatory responsiveness and disease susceptibility through identification of adhesion molecule and chemokine polymorphisms and the application to the treatment of inflammatory diseases of monoclonal antibodies and conventional drugs with specific actions on leukocyte adhesion and migration.
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Affiliation(s)
- Diane Marshall
- BHF Cardiovascular Medicine Unit, Faculty of Medicine, Imperial College, Hammersmith Hospital, Du Cane Road, London W12 ONN, UK
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