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Yamamoto K, Scilabra SD, Bonelli S, Jensen A, Scavenius C, Enghild JJ, Strickland DK. Novel insights into the multifaceted and tissue-specific roles of the endocytic receptor LRP1. J Biol Chem 2024:107521. [PMID: 38950861 DOI: 10.1016/j.jbc.2024.107521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 06/22/2024] [Accepted: 06/26/2024] [Indexed: 07/03/2024] Open
Abstract
Receptor-mediated endocytosis provides a mechanism for the selective uptake of specific molecules thereby controlling the composition of the extracellular environment and biological processes. The low-density lipoprotein receptor-related protein 1 (LRP1) is a widely expressed endocytic receptor that regulates cellular events by modulating the levels of numerous extracellular molecules via rapid endocytic removal. LRP1 also participates in signalling pathways through this modulation as well as in the interaction with membrane receptors and cytoplasmic adaptor proteins. LRP1 single nucleotide polymorphisms are associated with several diseases and conditions such as migraines, aortic aneurysms, cardiopulmonary dysfunction, corneal clouding, and bone dysmorphology and mineral density. Studies using Lrp1 knockout mice revealed a critical, non-redundant and tissue-specific role of LRP1 in regulating various physiological events. However, exactly how LRP1 functions to regulate so many distinct and specific processes is still not fully clear. Our recent proteomics studies have identified more than 300 secreted proteins that either directly interact with LRP1 or are modulated by LRP1 in various tissues. This review will highlight the remarkable ability of this receptor to regulate secreted molecules in a tissue-specific manner and discuss potential mechanisms underpinning such specificity. Uncovering the depth of these "hidden" specific interactions modulated by LRP1 will provide novel insights into a dynamic and complex extracellular environment that is involved in diverse biological and pathological processes.
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Affiliation(s)
- Kazuhiro Yamamoto
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom.
| | - Simone D Scilabra
- Proteomics Group of Ri.MED Foundation, Research Department IRCCS ISMETT, Palermo, Italy
| | - Simone Bonelli
- Proteomics Group of Ri.MED Foundation, Research Department IRCCS ISMETT, Palermo, Italy; Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Palermo, Italy
| | - Anders Jensen
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Carsten Scavenius
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Jan J Enghild
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Dudley K Strickland
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, Maryland, USA
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Yamamoto K, Scavenius C, Meschis MM, Gremida AME, Mogensen EH, Thøgersen IB, Bonelli S, Scilabra SD, Jensen A, Santamaria S, Ahnström J, Bou-Gharios G, Enghild JJ, Nagase H. A top-down approach to uncover the hidden ligandome of low-density lipoprotein receptor-related protein 1 in cartilage. Matrix Biol 2022; 112:190-218. [PMID: 36028175 DOI: 10.1016/j.matbio.2022.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/26/2022] [Accepted: 08/17/2022] [Indexed: 11/29/2022]
Abstract
The low-density lipoprotein receptor-related protein 1 (LRP1) is a cell-surface receptor ubiquitously expressed in various tissues. It plays tissue-specific roles by mediating endocytosis of a diverse range of extracellular molecules. Dysregulation of LRP1 is involved in multiple conditions including osteoarthritis (OA) but little information is available about the specific profile of direct binding partners of LRP1 (ligandome) for each tissue, which would lead to a better understanding of its role in disease states. Here, we investigated adult articular cartilage where impaired LRP1-mediated endocytosis leads to tissue destruction. We used a top-down approach involving proteomic analysis of the LRP1 interactome in human chondrocytes, direct binding assays using purified LRP1 and ligand candidates, and validation in LRP1-deficient fibroblasts and human chondrocytes, as well as a novel Lrp1 conditional knockout (KO) mouse model. We found that inhibition of LRP1 and ligand interaction results in cell death, alteration of the entire secretome and transcriptional modulations in human chondrocytes. We identified a chondrocyte-specific LRP1 ligandome consisting of more than 50 novel ligand candidates. Surprisingly, 23 previously reported LRP1 ligands were not regulated by LRP1-mediated endocytosis in human chondrocytes. We confirmed direct LRP1 binding of HGFAC, HMGB1, HMGB2, CEMIP, SLIT2, ADAMTS1, TSG6, IGFBP7, SPARC and LIF, correlation between their affinity for LRP1 and the rate of endocytosis, and some of their intracellular localization. Moreover, a conditional LRP1 KO mouse model demonstrated a critical role of LRP1 in regulating the high-affinity ligands in cartilage in vivo. This systematic approach revealed the specificity and the extent of the chondrocyte LRP1 ligandome and identified potential novel therapeutic targets for OA.
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Affiliation(s)
- Kazuhiro Yamamoto
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, United Kingdom.
| | - Carsten Scavenius
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark
| | - Maria M Meschis
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, United Kingdom
| | - Abdulrahman M E Gremida
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, United Kingdom
| | - Emilie H Mogensen
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark
| | - Ida B Thøgersen
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark
| | - Simone Bonelli
- Fondazione RiMED - ISMETT via Ernesto Tricomi 5, 90127 Palermo, Italy
| | - Simone D Scilabra
- Fondazione RiMED - ISMETT via Ernesto Tricomi 5, 90127 Palermo, Italy
| | - Anders Jensen
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, United Kingdom
| | - Salvatore Santamaria
- Department of Immunology and Inflammation, Imperial College London, Du Cane Road, W12 0NN, London, United Kingdom
| | - Josefin Ahnström
- Department of Immunology and Inflammation, Imperial College London, Du Cane Road, W12 0NN, London, United Kingdom
| | - George Bou-Gharios
- Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool L7 8TX, United Kingdom
| | - Jan J Enghild
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark
| | - Hideaki Nagase
- Kennedy Institute of Rheumatology, University of Oxford, Headington, Oxford OX3 7FY, United Kingdom
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Nichols CE, House JS, Li H, Ward JM, Wyss A, Williams JG, Deterding LJ, Bradbury JA, Miller L, Zeldin DC, London SJ. Lrp1 Regulation of Pulmonary Function. Follow-Up of Human GWAS in Mice. Am J Respir Cell Mol Biol 2021; 64:368-378. [PMID: 33290178 DOI: 10.1165/rcmb.2019-0444oc] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Human genome-wide association studies (GWASs) have identified more than 270 loci associated with pulmonary function; however, follow-up studies to determine causal genes at these loci are few. SNPs in low-density lipoprotein receptor-related protein 1 (LRP1) are associated with human pulmonary function in GWASs. Using murine models, we investigated the effect of genetic disruption of the Lrp1 gene in smooth muscle cells on pulmonary function in naive animals and after exposure to bacterial LPS or house dust mite extract. Disruption of Lrp1 in smooth muscle cells leads to an increase in tissue resistance, elastance, and tissue elastance at baseline. Furthermore, disruption of Lrp1 in smooth muscle increases airway responsiveness as measured by increased total lung resistance and airway resistance after methacholine. Immune cell counts in BAL fluid were increased in animals with Lrp1 disruption. The difference in airway responsiveness by genotype observed in naive animals was not observed after LPS or house dust mite extract exposure. To further explore the mechanisms contributing to changes in pulmonary function, we identified several ligands dysregulated with Lrp1 disruption in smooth muscle cells. These data suggest that dysregulation of LRP1 in smooth muscle cells affects baseline pulmonary function and airway responsiveness and helps establish LRP1 as the causal gene at this GWAS locus.
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Affiliation(s)
| | | | - Huiling Li
- Immunity, Inflammation, and Disease Laboratory
| | | | | | - Jason G Williams
- Mass Spectrometry Research and Support Group, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina
| | - Leesa J Deterding
- Mass Spectrometry Research and Support Group, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina
| | | | | | | | - Stephanie J London
- Immunity, Inflammation, and Disease Laboratory.,Epidemiology Branch, and
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Iosif C, Biondi A. Braided stents and their impact in intracranial aneurysm treatment for distal locations: from flow diverters to low profile stents. Expert Rev Med Devices 2019; 16:237-251. [DOI: 10.1080/17434440.2019.1575725] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Christina Iosif
- Department of Neuroradiology and Endovascular Treatment, Jean-Minjoz University Hospital, Besancon, France
- Department of Interventional Neuroradiology, Erasmus University Hospital, Brussels, Belgium
- Associate Professor in Radiology, European University of Cyprus, Nicosia, Cyprus
| | - Alessandra Biondi
- Department of Neuroradiology and Endovascular Treatment, Jean-Minjoz University Hospital, Besancon, France
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