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Cavallari N, Johnson A, Nagl C, Seiser S, Rechberger GN, Züllig T, Kufer TA, Elbe-Bürger A, Geiselhart S, Hoffmann-Sommergruber K. Nonspecific lipid-transfer proteins trigger TLR2 and NOD2 signaling and undergo ligand-dependent endocytosis in epithelial cells. J Allergy Clin Immunol 2024:S0091-6749(24)00744-9. [PMID: 39084297 DOI: 10.1016/j.jaci.2024.07.015] [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: 01/30/2024] [Revised: 07/10/2024] [Accepted: 07/24/2024] [Indexed: 08/02/2024]
Abstract
BACKGROUND Allergens can cross the epithelial barrier to enter the body but how this cellular passage affects protein structures and the downstream interactions with the immune system are still open questions. OBJECTIVE We sought to show the molecular details and the effects of 3 nonspecific lipid transfer proteins (nsLTPs; Mal d 3 [allergenic nsLTP1 from apple], Cor a 8 [allergenic nsLTP1 from hazelnut], and Pru p 3 [allergenic nsLTP1 from peach]) on epithelial cell uptake and transport. METHODS We used fluorescent imaging, flow cytometry, and proteomic and lipidomic screenings to identify the mechanism involved in nsLTP cellular uptake and signaling on selected epithelial and transgenic cell lines. RESULTS nsLTPs are transported across the epithelium without affecting cell membrane stability or viability, and allergen uptake was largely impaired by inhibition of clathrin-mediated endocytosis. Analysis of the lipidome associated with nsLTPs showed a wide variety of lipid ligands predicted to bind inside the allergen hydrophobic cavity. Importantly, the internalization of nsLTPs was contingent on these ligands in the protein complex. nsLTPs were found to initiate cellular signaling via Toll-like receptor 2 but not the cluster of differentiation 1 protein receptor, despite neither being essential for nsLTP endocytosis. We also provide evidence that the 3 allergens induced intracellular stress signaling through activation of the NOD2 pathway. CONCLUSIONS Our work consolidates the current model on nsLTP-epithelial cell interplay and adds molecular details about cell transport and signaling. In addition, we have developed a versatile toolbox to extend these investigations to other allergens and cell types.
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Affiliation(s)
- Nicola Cavallari
- Center for Pathophysiology, Infectiology and Immunology, Department of Pathophysiology and Allergy Research, Vienna, Austria
| | - Alexander Johnson
- Center for Anatomy & Cell Biology, Division of Anatomy, Medical University of Vienna, Vienna, Austria; Medical Imaging Cluster, Vienna, Austria
| | - Christoph Nagl
- Center for Pathophysiology, Infectiology and Immunology, Department of Pathophysiology and Allergy Research, Vienna, Austria
| | - Saskia Seiser
- Department of Dermatology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Gerald N Rechberger
- Institute of Molecular Biosciences, University of Graz, NAWI Graz, Graz, Austria
| | - Thomas Züllig
- Institute of Molecular Biosciences, University of Graz, NAWI Graz, Graz, Austria
| | - Thomas A Kufer
- Department of Immunology, Institute of Nutritional Medicine, University of Hohenheim, Stuttgart, Germany
| | - Adelheid Elbe-Bürger
- Department of Dermatology, Vienna General Hospital, Medical University of Vienna, Vienna, Austria
| | - Sabine Geiselhart
- Center for Pathophysiology, Infectiology and Immunology, Department of Pathophysiology and Allergy Research, Vienna, Austria
| | - Karin Hoffmann-Sommergruber
- Center for Pathophysiology, Infectiology and Immunology, Department of Pathophysiology and Allergy Research, Vienna, Austria.
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Terao J. Caveolae and caveolin-1 as targets of dietary polyphenols for protection against vascular endothelial dysfunction. J Clin Biochem Nutr 2024; 75:7-16. [PMID: 39070533 PMCID: PMC11273273 DOI: 10.3164/jcbn.24-30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 03/04/2024] [Indexed: 07/30/2024] Open
Abstract
Caveolae, consisting of caveolin-1 proteins, are ubiquitously present in endothelial cells and contribute to normal cardiovascular functions by acting as a platform for cellular signaling pathways as well as transcytosis and endocytosis. However, caveolin-1 is thought to have a proatherogenic role by inhibiting endothelial nitric oxide synthase activity and Nrf2 activation, or by promoting inflammation through NF-κB activation. Dietary polyphenols were suggested to exert anti-atherosclerotic effects by a mechanism involving the inhibition of endothelial dysfunction, by which they can regulate redox-sensitive signaling pathways in relation to NF-κB and Nrf2 activation. Some monomeric polyphenols and microbiota-derived catabolites from monomeric polyphenols or polymeric tannins might be responsible for the inhibition, because they can be transferred into the circulation from the digestive tract. Several polyphenols were reported to modulate caveolin-1 expression or its localization in caveolae. Therefore, we hypothesized that circulating polyphenols affect caveolae functions by altering its structure leading to the release of caveolin-1 from caveolae, and attenuating redox-sensitive signaling pathway-dependent caveolin-1 overexpression. Further studies using circulating polyphenols at a physiologically relevant level are necessary to clarify the mechanism of action of dietary polyphenols targeting caveolae and caveolin-1.
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Affiliation(s)
- Junji Terao
- Faculty of Medicine, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
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Mu X, Liu SJ, Zheng LY, Ouyang C, Abdalla AME, Wang XX, Chen K, Yang FF, Meng N. The long coiled-coil protein NECC2 regulates oxLDL-induced endothelial oxidative damage and exacerbates atherosclerosis development in apolipoprotein E -/- mice. Free Radic Biol Med 2024; 216:106-117. [PMID: 38461872 DOI: 10.1016/j.freeradbiomed.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/28/2024] [Accepted: 03/02/2024] [Indexed: 03/12/2024]
Abstract
Oxidized low density lipoprotein (oxLDL)-induced endothelial oxidative damage promotes the development of atherosclerosis. Caveolae play an essential role in maintaining the survival and function of vascular endothelial cell (VEC). It is reported that the long coiled-coil protein NECC2 is localized in caveolae and is associated with neural cell differentiation and adipocyte formation, but its role in VECs needs to be clarified. Our results showed NECC2 expression increased in the endothelium of plaque-loaded aortas and oxLDL-treated HUVECs. Down-regulation of NECC2 by NECC2 siRNA or compound YF-307 significantly inhibited oxLDL-induced VEC apoptosis and the adhesion factors expression. Remarkably, inhibition of NECC2 expression in the endothelium of apoE-/- mice by adeno-associated virus (AAV)-carrying NECC2 shRNA or compound YF-307 alleviated endothelium injury and restricted atherosclerosis development. The immunoprecipitation results confirmed that NECC2 interacted with Tyk2 and caveolin-1(Cav-1) in VECs, and NECC2 further promoted the phosphorylation of Cav-1 at Tyr14 b y activating Tyk2 phosphorylation. On the other hand, inhibiting NECC2 levels suppressed oxLDL-induced phosphorylation of Cav-1, uptake of oxLDL by VECs, accumulation of intracellular reactive oxygen species and activation of NF-κB. Our findings suggest that NECC2 may contribute to oxLDL-induced VEC injury and atherosclerosis via modulating Cav-1 phosphorylation through Tyk2. This work provides a new concept and drug target for treating atherosclerosis.
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Affiliation(s)
- Xin Mu
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China; The Institute for Tissue Engineering and Regenerative Medicine, Liaocheng University/Liaocheng People's Hospital, Liaocheng, Shangdong, 252000, China
| | - Shu-Jun Liu
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Lei-Yin Zheng
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Chenxi Ouyang
- Department of Vascular Surgery, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ahmed M E Abdalla
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Xin-Xin Wang
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China
| | - Kai Chen
- New Drug Evaluation Center, Shandong Academy of Pharmaceutical Sciences, Jinan, 250101, China; Shandong Innovation Center of Engineered Bacteriophage Therapeutics, Jinan, China.
| | - Fei-Fei Yang
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China.
| | - Ning Meng
- School of Biological Science and Technology, University of Jinan, Jinan, 250022, China.
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Pyrpyris N, Dimitriadis K, Beneki E, Iliakis P, Soulaidopoulos S, Tsioufis P, Adamopoulou E, Kasiakogias A, Sakalidis A, Koutsopoulos G, Aggeli K, Tsioufis K. LOX-1 Receptor: A Diagnostic Tool and Therapeutic Target in Atherogenesis. Curr Probl Cardiol 2024; 49:102117. [PMID: 37802161 DOI: 10.1016/j.cpcardiol.2023.102117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 09/30/2023] [Indexed: 10/08/2023]
Abstract
Low-density lipoprotein (LDL) and oxidized LDL (oxLDL) are major contributors to atherogenesis, as endogenous antigens, via several receptors such as LOX 1. A PubMed search was conducted in order to identify relevant articles regarding LOX-1's role in the atherosclerosis, diagnosis, prognostic use and molecules that could be used for therapy. The references of the manuscripts obtained were also reviewed, in order to find additional relevant bibliography. LOX-1 is a lectin-like pattern recognition receptor, mostly expressed in endothelial cells (ECs) which can bind a variety of molecules, including oxLDL and C-reactive protein (CRP). LOX-1 plays a key role in oxLDL's role as a causative agent of atherosclerosis through several pathologic mechanisms, such as oxLDL deposition in the subintima, foam cell formation and endothelial dysfunction. Additionally, LOX-1 acts a scavenger receptor for oxLDL in macrophages and can be responsible for oxLDL uptake, when stimulated. Serum LOX-1 (sLOX-1) has emerged as a new, potential biomarker for diagnosis of acute coronary syndromes, and it seems promising for use along with other common biomarkers in everyday clinical practice. In a therapeutic perspective, natural as well as synthetic molecules exert anti-LOX-1 properties and attain the receptor's pathophysiological effects, thus extensive research is ongoing to further evaluate molecules with therapeutic potential. However, most of these molecules need further trials in order to properly assess their safety and efficacy for clinical use. The aim of this review is to investigate LOX-1 role in atherogenesis and explore its potential as diagnostic tool and therapeutic target.
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Affiliation(s)
- Nikolaos Pyrpyris
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Kyriakos Dimitriadis
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece.
| | - Eirini Beneki
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Panagiotis Iliakis
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Stergios Soulaidopoulos
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Panagiotis Tsioufis
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Elena Adamopoulou
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Alexandros Kasiakogias
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Athanasios Sakalidis
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - George Koutsopoulos
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Konstantina Aggeli
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
| | - Konstantinos Tsioufis
- First Department of Cardiology, School of Medicine, National and Kapodistrian University of Athens, Hippokration Hospital, Athens, Greece
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Xu J, Ma H, Shi L, Zhou H, Cheng Y, Tong J, Meng B, Xu X, He K, Ding S, Zhang J, Yue L, Xiang G. Inflammatory Cell-Derived MYDGF Attenuates Endothelial LDL Transcytosis to Protect Against Atherogenesis. Arterioscler Thromb Vasc Biol 2023; 43:e443-e467. [PMID: 37767706 DOI: 10.1161/atvbaha.123.319905] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Inflammation contributes to the pathogenesis of atherosclerosis. But little is known about the potential benefits of inflammatory cells to atherosclerosis. The aim of this study was to investigate the function of inflammatory cells/endothelium axis and determine whether and how inflammatory cell-derived MYDGF (myeloid-derived growth factor) inhibited endothelial LDL (low-density lipoprotein) transcytosis. METHODS In in vivo experiments, both loss- and gain-of-function strategies were used to evaluate the effect of inflammatory cell-derived MYDGF on LDL transcytosis. We generated monocyte/macrophage-targeted MYDGF-null mice on an Ldlr (LDL receptor)-/- background in the loss-of-function strategy and restored the inflammatory cell-derived MYDGF by bone marrow transplantation and inflammatory cell-specific overexpression of MYDGF mice model in the gain-of-function strategy. In in vitro experiments, coculture experiments between primary mouse aortic endothelial cells and macrophages and mouse aortic endothelial cells supplemented with or without recombinant MYDGF were conducted. RESULTS Inflammatory cell-derived MYDGF deficiency aggravated endothelial LDL transcytosis, drove LDL uptake by artery wall, and thus exacerbated atherosclerosis in vivo. Inflammatory cell-derived MYDGF restoration by bone marrow transplantation and inflammatory cell MYDGF overexpression alleviated LDL transport across the endothelium, prevented LDL accumulation in the subendothelial space, and subsequently ameliorated atherosclerosis in vivo. Furthermore, in the in vitro study, macrophages isolated from MYDGF+/+ mice and recombinant MYDGF attenuated LDL transcytosis and uptake in mouse aortic endothelial cells. Mechanistically, MYDGF inhibited MAP4K4 (mitogen-activated protein kinase kinase kinase kinase isoform 4) phosphorylation, enhanced activation of Akt (protein kinase B)-1, and diminished the FoxO (forkhead box O) 3a signaling cascade to exert protective effects of MYDGF on LDL transcytosis and atherosclerosis. CONCLUSIONS The findings support a role for inflammatory cell-derived MYDGF served as a cross talk factor between inflammatory cells and endothelial cells that inhibits LDL transcytosis across endothelium. MYDGF may become a novel therapeutic drug for atherosclerosis, and the beneficial effects of inflammatory cell in atherosclerosis deserve further attention.
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Affiliation(s)
- Jinling Xu
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
- The First School of Clinical Medicine, Southern Medical University, Guangdong, China (J.X., L.S., Y.C., J.T., K.H., S.D., G.X.)
| | - Huaxing Ma
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, China (H.M.)
| | - Lingfeng Shi
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
- The First School of Clinical Medicine, Southern Medical University, Guangdong, China (J.X., L.S., Y.C., J.T., K.H., S.D., G.X.)
| | - Hui Zhou
- Department of General Surgery, The Third Xiangya Hospital, Central South University, Hunan, China (H.Z.)
| | - Yangyang Cheng
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Guizhou Medical University, China (H.M.)
| | - Jiayue Tong
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
- The First School of Clinical Medicine, Southern Medical University, Guangdong, China (J.X., L.S., Y.C., J.T., K.H., S.D., G.X.)
| | - Biying Meng
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
| | - Xiaoli Xu
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
| | - Kaiyue He
- The First School of Clinical Medicine, Southern Medical University, Guangdong, China (J.X., L.S., Y.C., J.T., K.H., S.D., G.X.)
| | - Sheng Ding
- The First School of Clinical Medicine, Southern Medical University, Guangdong, China (J.X., L.S., Y.C., J.T., K.H., S.D., G.X.)
| | - Jiajia Zhang
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
| | - Ling Yue
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
| | - Guangda Xiang
- Department of Endocrinology, General Hospital of Central Theater Command, Wuhan, China (J.X., L.S., Y.C., J.T., B.M., X.X., J.Z., L.Y., G.X.)
- The First School of Clinical Medicine, Southern Medical University, Guangdong, China (J.X., L.S., Y.C., J.T., K.H., S.D., G.X.)
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Shu M, Cheng W, Jia X, Bai X, Zhao Y, Lu Y, Zhu L, Zhu Y, Wang L, Shu Y, Song Y, Jin S. AGEs promote atherosclerosis by increasing LDL transcytosis across endothelial cells via RAGE/NF-κB/Caveolin-1 pathway. Mol Med 2023; 29:113. [PMID: 37605109 PMCID: PMC10463687 DOI: 10.1186/s10020-023-00715-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Accepted: 08/14/2023] [Indexed: 08/23/2023] Open
Abstract
OBJECTIVE To elucidate the mechanism whereby advanced glycation end products (AGEs) accelerate atherosclerosis (AS) and to explore novel therapeutic strategies for atherosclerotic cardiovascular disease. METHODS AND RESULTS The effect of AGEs on low-density lipoprotein (LDL) transcytosis across endothelial cells (ECs) was assessed using an in vitro model of LDL transcytosis. We observed that AGEs activated the receptor for advanced glycation end products (RAGE) on the surface of ECs and consequently upregulated Caveolin-1, which in turn increased caveolae-mediated LDL transcytosis and accelerated AS progression. Our molecular assessment revealed that AGEs activate the RAGE-NF-κB signaling, which then recruits the NF-κB subunit p65 to the RAGE promoter and consequently enhances RAGE transcription, thereby forming a positive feedback loop between the NF-κB signaling and RAGE expression. Increased NF-κB signaling ultimately upregulated Caveolin-1, promoting LDL transcytosis, and inhibition of RAGE suppressed AGE-induced LDL transcytosis. In ApoE-/- mice on a high-fat diet, atherosclerotic plaque formation was accelerated by AGEs but suppressed by EC-specific knockdown of RAGE. CONCLUSION AGEs accelerate the development of diabetes-related AS by increasing the LDL transcytosis in ECs through the activation of the RAGE/NF-κB/Caveolin-1 axis, which may be targeted to prevent or treat diabetic macrovascular complications.
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Affiliation(s)
- Meng Shu
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Wenzhuo Cheng
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Xiong Jia
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Xiangli Bai
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Ying Zhao
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Yajing Lu
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Lin Zhu
- Department of Pediatrics, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yan Zhu
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Li Wang
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Yan Shu
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Yi Song
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China
| | - Si Jin
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, Hubei, China.
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Shu Y, Jin S. Caveolin-1 in endothelial cells: A potential therapeutic target for atherosclerosis. Heliyon 2023; 9:e18653. [PMID: 37554846 PMCID: PMC10405014 DOI: 10.1016/j.heliyon.2023.e18653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 07/17/2023] [Accepted: 07/24/2023] [Indexed: 08/10/2023] Open
Abstract
Atherosclerosis (AS) is a chronic vascular disease characterized by lipid accumulation and the activation of the inflammatory response; it remains the leading nation-wide cause of death. Early in the progression of AS, stimulation by pro-inflammatory agonists (TNF-α, LPS, and others), oxidized lipoproteins (ox-LDL), and biomechanical stimuli (low shear stress) lead to endothelial cell activation and dysfunction. Consequently, it is crucial to investigate how endothelial cells respond to different stressors and ways to alter endothelial cell activation in AS development, as they are the earliest cells to respond. Caveolin-1 (Cav1) is a 21-24-kDa membrane protein located in caveolae and highly expressed in endothelial cells, which plays a vital role in regulating lipid transport, inflammatory responses, and various cellular signaling pathways and has atherogenic effects. This review summarizes recent studies on the structure and physiological functions of Cav1 and outlines the potential mechanisms it mediates in AS development. Included are the roles of Cav1 in the regulation of endothelial cell autophagy, response to shear stress, modulation of the eNOS/NO axis, and transduction of inflammatory signaling pathways. This review provides a rationale for proposing Cav1 as a novel target for the prevention of AS, as well as new ideas for therapeutic strategies for early AS.
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Affiliation(s)
- Yan Shu
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, China
| | - Si Jin
- Department of Endocrinology, Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, 39 Lake Road, East Lake Ecological Scenic, Wuhan, 430077, China
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Puddu A, Montecucco F, Maggi D. Caveolin-1 and Atherosclerosis: Regulation of LDLs Fate in Endothelial Cells. Int J Mol Sci 2023; 24:ijms24108869. [PMID: 37240214 DOI: 10.3390/ijms24108869] [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: 03/16/2023] [Revised: 04/28/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
Caveolae are 50-100 nm cell surface plasma membrane invaginations observed in terminally differentiated cells. They are characterized by the presence of the protein marker caveolin-1. Caveolae and caveolin-1 are involved in regulating several signal transduction pathways and processes. It is well recognized that they have a central role as regulators of atherosclerosis. Caveolin-1 and caveolae are present in most of the cells involved in the development of atherosclerosis, including endothelial cells, macrophages, and smooth muscle cells, with evidence of either pro- or anti-atherogenic functions depending on the cell type examined. Here, we focused on the role of caveolin-1 in the regulation of the LDLs' fate in endothelial cells.
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Affiliation(s)
- Alessandra Puddu
- Department of Internal Medicine, University of Genoa, Viale Benedetto XV, 6, 16132 Genoa, Italy
| | - Fabrizio Montecucco
- Department of Internal Medicine, University of Genoa, Viale Benedetto XV, 6, 16132 Genoa, Italy
- IRCCS Ospedale Policlinico San Martino Genoa, Italian Cardiovascular Network, Largo Rosanna Benzi 10, 16132 Genoa, Italy
| | - Davide Maggi
- Department of Internal Medicine, University of Genoa, Viale Benedetto XV, 6, 16132 Genoa, Italy
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9
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Smaldone G, Rosa E, Gallo E, Diaferia C, Morelli G, Stornaiuolo M, Accardo A. Caveolin-Mediated Internalization of Fmoc-FF Nanogels in Breast Cancer Cell Lines. Pharmaceutics 2023; 15:pharmaceutics15031026. [PMID: 36986886 PMCID: PMC10051563 DOI: 10.3390/pharmaceutics15031026] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023] Open
Abstract
INTRODUCTION Hydrogel nanoparticles, also known as nanogels (NGs), have been recently proposed as alternative supramolecular vehicles for the delivery of biologically relevant molecules like anticancer drugs and contrast agents. The inner compartment of peptide based NGs can be opportunely modified according to the chemical features of the cargo, thus improving its loading and release. A full understanding of the intracellular mechanism involved in nanogel uptake by cancer cells and tissues would further contribute to the potential diagnostic and clinical applications of these nanocarriers, allowing the fine tuning of their selectivity, potency, and activity. The structural characterization of nanogels were assessed by Dynamic Light Scattering (DLS) and Nanoparticles Tracking Analysis (NTA) analysis. Cells viability of Fmoc-FF nanogels was evaluated by MTT assay on six breast cancer cell lines at different incubation times (24, 48, and 72 h) and peptide concentrations (in the range 6.25 × 10-4 ÷ 5·10-3 × wt%). The cell cycle and mechanisms involved in Fmoc-FF nanogels intracellular uptake were evaluated using flow cytometry and confocal analysis, respectively. Fmoc-FF nanogels, endowed with a diameter of ~130 nm and a zeta potential of ~-20.0/-25.0 mV, enter cancer cells via caveolae, mostly those responsible for albumin uptake. The specificity of the machinery used by Fmoc-FF nanogels confers a selectivity toward cancer cell lines overexpressing the protein caveolin1 and efficiently performing caveolae-mediated endocytosis.
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Affiliation(s)
| | - Elisabetta Rosa
- Department of Pharmacy and Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", 80131 Naples, Italy
| | - Enrico Gallo
- IRCCS Synlab SDN, Via Gianturco 113, 80143 Naples, Italy
| | - Carlo Diaferia
- Department of Pharmacy and Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", 80131 Naples, Italy
| | - Giancarlo Morelli
- Department of Pharmacy and Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", 80131 Naples, Italy
| | - Mariano Stornaiuolo
- Department of Pharmacy and Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", 80131 Naples, Italy
| | - Antonella Accardo
- Department of Pharmacy and Research Centre on Bioactive Peptides (CIRPeB), University of Naples "Federico II", 80131 Naples, Italy
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10
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Langlois NI, Ma KY, Clark HA. Nucleic acid nanostructures for in vivo applications: The influence of morphology on biological fate. APPLIED PHYSICS REVIEWS 2023; 10:011304. [PMID: 36874908 PMCID: PMC9869343 DOI: 10.1063/5.0121820] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 12/12/2022] [Indexed: 05/23/2023]
Abstract
The development of programmable biomaterials for use in nanofabrication represents a major advance for the future of biomedicine and diagnostics. Recent advances in structural nanotechnology using nucleic acids have resulted in dramatic progress in our understanding of nucleic acid-based nanostructures (NANs) for use in biological applications. As the NANs become more architecturally and functionally diverse to accommodate introduction into living systems, there is a need to understand how critical design features can be controlled to impart desired performance in vivo. In this review, we survey the range of nucleic acid materials utilized as structural building blocks (DNA, RNA, and xenonucleic acids), the diversity of geometries for nanofabrication, and the strategies to functionalize these complexes. We include an assessment of the available and emerging characterization tools used to evaluate the physical, mechanical, physiochemical, and biological properties of NANs in vitro. Finally, the current understanding of the obstacles encountered along the in vivo journey is contextualized to demonstrate how morphological features of NANs influence their biological fates. We envision that this summary will aid researchers in the designing novel NAN morphologies, guide characterization efforts, and design of experiments and spark interdisciplinary collaborations to fuel advancements in programmable platforms for biological applications.
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Affiliation(s)
- Nicole I. Langlois
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, USA
| | - Kristine Y. Ma
- Department of Bioengineering, Northeastern University, Boston, Massachusetts 02115, USA
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11
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Vavere AL, Sinsakul M, Ongstad EL, Yang Y, Varma V, Jones C, Goodman J, Dubois VFS, Quartino AL, Karathanasis SK, Abuhatzira L, Collén A, Antoniades C, Koren MJ, Gupta R, George RT. Lectin-Like Oxidized Low-Density Lipoprotein Receptor 1 Inhibition in Type 2 Diabetes: Phase 1 Results. J Am Heart Assoc 2023; 12:e027540. [PMID: 36688371 PMCID: PMC9973634 DOI: 10.1161/jaha.122.027540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 12/12/2022] [Indexed: 01/24/2023]
Abstract
Background Blockade of the lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) is a potentially attractive mechanism for lowering inflammatory and lipid risk in patients with atherosclerosis. This study aims to assess the safety, tolerability, and target engagement of MEDI6570, a high-affinity monoclonal blocking antibody to LOX-1. Methods and Results This phase 1, first-in-human, placebo-controlled study (NCT03654313) randomized 88 patients with type 2 diabetes to receive single ascending doses (10, 30, 90, 250, or 500 mg) or multiple ascending doses (90, 150, or 250 mg once monthly for 3 months) of MEDI6570 or placebo. Primary end point was safety; secondary and exploratory end points included pharmacokinetics, immunogenicity, free soluble LOX-1 levels, and change in coronary plaque volume. Mean age was 57.6/58.1 years in the single ascending doses/multiple ascending doses groups, 31.3%/62.5% were female, and mean type 2 diabetes duration was 9.7/8.7 years. Incidence of adverse events was similar among cohorts. MEDI6570 exhibited nonlinear pharmacokinetics, with terminal half-life increasing from 4.6 days (30 mg) to 11.2 days (500 mg), consistent with target-mediated drug disposition. Dose-dependent reductions in mean soluble LOX-1 levels from baseline were observed (>66% at 4 weeks and 71.61-82.96% at 10 weeks in the single ascending doses and multiple ascending doses groups, respectively). After 3 doses, MEDI6570 was associated with nonsignificant regression of noncalcified plaque volume versus placebo (-13.45 mm3 versus -8.25 mm3). Conclusions MEDI6570 was well tolerated and demonstrated dose-dependent soluble LOX-1 suppression and a pharmacokinetic profile consistent with once-monthly dosing. Registration URL: https://clinicaltrials.gov/; Unique identifier: NCT03654313.
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Affiliation(s)
- Andrea L. Vavere
- Early Clinical Development, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Marvin Sinsakul
- Early Clinical Development, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Emily L. Ongstad
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Ye Yang
- Early CVRM Biometrics, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Vijayalakshmi Varma
- Early Clinical Development, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Christopher Jones
- Clinical Pharmacology & Quantitative PharmacologyClinical Pharmacology & Safety Sciences, R&D, AstraZenecaGothenburgSweden
| | - Joanne Goodman
- Clinical Pharmacology & Quantitative PharmacologyClinical Pharmacology & Safety Sciences, R&D, AstraZenecaGothenburgSweden
| | - Vincent F. S. Dubois
- Clinical Pharmacology & Quantitative PharmacologyClinical Pharmacology & Safety Sciences, R&D, AstraZenecaGothenburgSweden
| | - Angelica L. Quartino
- Clinical Pharmacology & Quantitative PharmacologyClinical Pharmacology & Safety Sciences, R&D, AstraZenecaGothenburgSweden
| | - Sotirios K. Karathanasis
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Liron Abuhatzira
- Early Clinical Development, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Anna Collén
- Projects, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGothenburgSweden
| | - Charalambos Antoniades
- Division of Cardiovascular Medicine, Radcliffe Department of MedicineUniversity of OxfordUnited Kingdom
| | - Michael J. Koren
- Jacksonville Center for Clinical Research (JCCR)JacksonvilleFLUSA
| | - Ruchi Gupta
- Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
| | - Richard T. George
- Early Clinical Development, Research and Early Development, Cardiovascular, Renal and MetabolismBioPharmaceuticals R&D, AstraZenecaGaithersburgMDUSA
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12
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Piccoli M, Cirillo F, Ghiroldi A, Rota P, Coviello S, Tarantino A, La Rocca P, Lavota I, Creo P, Signorelli P, Pappone C, Anastasia L. Sphingolipids and Atherosclerosis: The Dual Role of Ceramide and Sphingosine-1-Phosphate. Antioxidants (Basel) 2023; 12:antiox12010143. [PMID: 36671005 PMCID: PMC9855164 DOI: 10.3390/antiox12010143] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/28/2022] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Sphingolipids are bioactive molecules that play either pro- and anti-atherogenic roles in the formation and maturation of atherosclerotic plaques. Among SLs, ceramide and sphingosine-1-phosphate showed antithetic properties in regulating various molecular mechanisms and have emerged as novel potential targets for regulating the development of atherosclerosis. In particular, maintaining the balance of the so-called ceramide/S1P rheostat is important to prevent the occurrence of endothelial dysfunction, which is the trigger for the entire atherosclerotic process and is strongly associated with increased oxidative stress. In addition, these two sphingolipids, together with many other sphingolipid mediators, are directly involved in the progression of atherogenesis and the formation of atherosclerotic plaques by promoting the oxidation of low-density lipoproteins (LDL) and influencing the vascular smooth muscle cell phenotype. The modulation of ceramide and S1P levels may therefore allow the development of new antioxidant therapies that can prevent or at least impair the onset of atherogenesis, which would ultimately improve the quality of life of patients with coronary artery disease and significantly reduce their mortality.
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Affiliation(s)
- Marco Piccoli
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
| | - Federica Cirillo
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
| | - Andrea Ghiroldi
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
| | - Paola Rota
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20133 Milan, Italy
| | - Simona Coviello
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
| | - Adriana Tarantino
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
- Faculty of Medicine and Surgery, University Vita-Salute San Raffaele, Via Olgettina 58, 20132 Milan, Italy
| | - Paolo La Rocca
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
- Department of Biomedical Sciences for Health, University of Milan, Via Mangiagalli 31, 20133 Milan, Italy
| | - Ivana Lavota
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
| | - Pasquale Creo
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
| | - Paola Signorelli
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
- Aldo Ravelli Center for Neurotechnology and Experimental Brain Therapeutics, Department of Health Sciences, University of Milan, Via Antonio di Rudinì 8, 20142 Milan, Italy
| | - Carlo Pappone
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
- Faculty of Medicine and Surgery, University Vita-Salute San Raffaele, Via Olgettina 58, 20132 Milan, Italy
- Arrhythmology Department, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
| | - Luigi Anastasia
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, Piazza Malan 2, San Donato Milanese, 20097 Milan, Italy
- Institute for Molecular and Translational Cardiology (IMTC), San Donato Milanese, 20097 Milan, Italy
- Faculty of Medicine and Surgery, University Vita-Salute San Raffaele, Via Olgettina 58, 20132 Milan, Italy
- Correspondence: ; Tel.: +39-0226437765
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13
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Enyong EN, Gurley JM, De Ieso ML, Stamer WD, Elliott MH. Caveolar and non-Caveolar Caveolin-1 in ocular homeostasis and disease. Prog Retin Eye Res 2022; 91:101094. [PMID: 35729002 PMCID: PMC9669151 DOI: 10.1016/j.preteyeres.2022.101094] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/03/2022] [Accepted: 06/10/2022] [Indexed: 11/17/2022]
Abstract
Caveolae, specialized plasma membrane invaginations present in most cell types, play important roles in multiple cellular processes including cell signaling, lipid uptake and metabolism, endocytosis and mechanotransduction. They are found in almost all cell types but most abundant in endothelial cells, adipocytes and fibroblasts. Caveolin-1 (Cav1), the signature structural protein of caveolae was the first protein associated with caveolae, and in association with Cavin1/PTRF is required for caveolae formation. Genetic ablation of either Cav1 or Cavin1/PTRF downregulates expression of the other resulting in loss of caveolae. Studies using Cav1-deficient mouse models have implicated caveolae with human diseases such as cardiomyopathies, lipodystrophies, diabetes and muscular dystrophies. While caveolins and caveolae are extensively studied in extra-ocular settings, their contributions to ocular function and disease pathogenesis are just beginning to be appreciated. Several putative caveolin/caveolae functions are relevant to the eye and Cav1 is highly expressed in retinal vascular and choroidal endothelium, Müller glia, the retinal pigment epithelium (RPE), and the Schlemm's canal endothelium and trabecular meshwork cells. Variants at the CAV1/2 gene locus are associated with risk of primary open angle glaucoma and the high risk HTRA1 variant for age-related macular degeneration is thought to exert its effect through regulation of Cav1 expression. Caveolins also play important roles in modulating retinal neuroinflammation and blood retinal barrier permeability. In this article, we describe the current state of caveolin/caveolae research in the context of ocular function and pathophysiology. Finally, we discuss new evidence showing that retinal Cav1 exists and functions outside caveolae.
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Affiliation(s)
- Eric N Enyong
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Ophthalmology, Dean A. McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Jami M Gurley
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Ophthalmology, Dean A. McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Michael L De Ieso
- Department of Ophthalmology, Duke Eye Center, Duke University, Durham, NC, USA
| | - W Daniel Stamer
- Department of Ophthalmology, Duke Eye Center, Duke University, Durham, NC, USA
| | - Michael H Elliott
- Department of Physiology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Ophthalmology, Dean A. McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
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14
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Caveolin-1 is a primary determinant of endothelial stiffening associated with dyslipidemia, disturbed flow, and ageing. Sci Rep 2022; 12:17822. [PMID: 36280774 PMCID: PMC9592578 DOI: 10.1038/s41598-022-20713-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 09/16/2022] [Indexed: 01/20/2023] Open
Abstract
Endothelial stiffness is emerging as a major determinant in endothelial function. Here, we analyzed the role of caveolin-1 (Cav-1) in determining the stiffness of endothelial cells (EC) exposed to oxidized low density lipoprotein (oxLDL) under static and hemodynamic conditions in vitro and of aortic endothelium in vivo in mouse models of dyslipidemia and ageing. Elastic moduli of cultured ECs and of the endothelial monolayer of freshly isolated mouse aortas were measured using atomic force microscopy (AFM). We found that a loss of Cav-1 abrogates the uptake of oxLDL and oxLDL-induced endothelial stiffening, as well as endothelial stiffening induced by disturbed flow (DF), which was also oxLDL dependent. Mechanistically, Cav-1 is required for the expression of CD36 (cluster of differentiation 36) scavenger receptor. Genetic deletion of Cav-1 abrogated endothelial stiffening observed in the DF region of the aortic arch, and induced by a high fat diet (4-6 weeks) and significantly blunted endothelial stiffening that develops with advanced age. This effect was independent of stiffening of the sub-endothelium layer. Additionally, Cav-1 expression significantly increased with age. No differences in elastic modulus were observed between the sexes in advanced aged wild type and Cav-1 knockout mice. Taken together, this study demonstrates that Cav-1 plays a critical role in endothelial stiffening induced by oxLDL in vitro and by dyslipidemia, disturbed flow and ageing in vivo.
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15
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Kakava S, Schlumpf E, Panteloglou G, Tellenbach F, von Eckardstein A, Robert J. Brain Endothelial Cells in Contrary to the Aortic Do Not Transport but Degrade Low-Density Lipoproteins via Both LDLR and ALK1. Cells 2022; 11:cells11193044. [PMID: 36231005 PMCID: PMC9564369 DOI: 10.3390/cells11193044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 11/16/2022] Open
Abstract
The transport of low-density lipoprotein (LDL) through the endothelium is a key step in the development of atherosclerosis, but it is notorious that phenotypic differences exist between endothelial cells originating from different vascular beds. Endothelial cells forming the blood–brain barrier restrict paracellular and transcellular passage of plasma proteins. Here, we systematically compared brain versus aortic endothelial cells towards their interaction with LDL and the role of proteins known to regulate the uptake of LDL by endothelial cells. Both brain endothelial cells and aortic endothelial cells bind and internalize LDL. However, whereas aortic endothelial cells degrade very small amounts of LDL and transcytose the majority, brain endothelial cells degrade but do not transport LDL. Using RNA interference (siRNA), we found that the LDLR–clathrin pathway leads to LDL degradation in either endothelial cell type. Both loss- and gain-of-function experiments showed that ALK1, which promotes transcellular LDL transport in aortic endothelial cells, also limits LDL degradation in brain endothelial cells. SR-BI and caveolin-1, which promote LDL uptake and transport into aortic endothelial cells, limit neither binding nor association of LDL to brain endothelial cells. Together, these results indicate distinct LDL trafficking by brain microvascular endothelial cells and aortic endothelial cells.
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Affiliation(s)
- Sofia Kakava
- Institute of Clinical Chemistry, University Hospital of Zurich, 8952 Schlieren, Switzerland
- Bio Medicine Program, Life Science Zurich Graduate School, University of Zurich, 8000 Zurich, Switzerland
| | - Eveline Schlumpf
- Institute of Clinical Chemistry, University Hospital of Zurich, 8952 Schlieren, Switzerland
| | - Grigorios Panteloglou
- Institute of Clinical Chemistry, University Hospital of Zurich, 8952 Schlieren, Switzerland
| | - Flavia Tellenbach
- Institute of Clinical Chemistry, University Hospital of Zurich, 8952 Schlieren, Switzerland
| | - Arnold von Eckardstein
- Institute of Clinical Chemistry, University Hospital of Zurich, 8952 Schlieren, Switzerland
- Bio Medicine Program, Life Science Zurich Graduate School, University of Zurich, 8000 Zurich, Switzerland
| | - Jerome Robert
- Institute of Clinical Chemistry, University Hospital of Zurich, 8952 Schlieren, Switzerland
- Correspondence: or
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16
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Batori RK, Chen F, Bordan Z, Haigh S, Su Y, Verin AD, Barman SA, Stepp DW, Chakraborty T, Lucas R, Fulton DJR. Protective role of Cav-1 in pneumolysin-induced endothelial barrier dysfunction. Front Immunol 2022; 13:945656. [PMID: 35967431 PMCID: PMC9363592 DOI: 10.3389/fimmu.2022.945656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 07/04/2022] [Indexed: 01/16/2023] Open
Abstract
Pneumolysin (PLY) is a bacterial pore forming toxin and primary virulence factor of Streptococcus pneumonia, a major cause of pneumonia. PLY binds cholesterol-rich domains of the endothelial cell (EC) plasma membrane resulting in pore assembly and increased intracellular (IC) Ca2+ levels that compromise endothelial barrier integrity. Caveolae are specialized plasmalemma microdomains of ECs enriched in cholesterol. We hypothesized that the abundance of cholesterol-rich domains in EC plasma membranes confers cellular susceptibility to PLY. Contrary to this hypothesis, we found increased PLY-induced IC Ca2+ following membrane cholesterol depletion. Caveolin-1 (Cav-1) is an essential structural protein of caveolae and its regulation by cholesterol levels suggested a possible role in EC barrier function. Indeed, Cav-1 and its scaffolding domain peptide protected the endothelial barrier from PLY-induced disruption. In loss of function experiments, Cav-1 was knocked-out using CRISPR-Cas9 or silenced in human lung microvascular ECs. Loss of Cav-1 significantly enhanced the ability of PLY to disrupt endothelial barrier integrity. Rescue experiments with re-expression of Cav-1 or its scaffolding domain peptide protected the EC barrier against PLY-induced barrier disruption. Dynamin-2 (DNM2) is known to regulate caveolar membrane endocytosis. Inhibition of endocytosis, with dynamin inhibitors or siDNM2 amplified PLY induced EC barrier dysfunction. These results suggest that Cav-1 protects the endothelial barrier against PLY by promoting endocytosis of damaged membrane, thus reducing calcium entry and PLY-dependent signaling.
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Affiliation(s)
- Robert K. Batori
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Feng Chen
- Department of Forensic Medicine, Nanjing Medical University, Nanjing, China
| | - Zsuzsanna Bordan
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Stephen Haigh
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Yunchao Su
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Alexander D. Verin
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
- Division of Critical Care and Pulmonary Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Scott A. Barman
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - David W. Stepp
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
- Department of Phyiology, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - Trinad Chakraborty
- Institute of Human Microbiology, Justus-Liebig University, Giessen, Germany
| | - Rudolf Lucas
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, United States
- Division of Critical Care and Pulmonary Medicine, Medical College of Georgia, Augusta University, Augusta, GA, United States
| | - David J. R. Fulton
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, United States
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, United States
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17
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Sheikholeslami B, Lam NW, Dua K, Haghi M. Exploring the impact of physicochemical properties of liposomal formulations on their in vivo fate. Life Sci 2022; 300:120574. [DOI: 10.1016/j.lfs.2022.120574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/12/2022] [Accepted: 04/18/2022] [Indexed: 12/16/2022]
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18
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Rudge JD. A New Hypothesis for Alzheimer's Disease: The Lipid Invasion Model. J Alzheimers Dis Rep 2022; 6:129-161. [PMID: 35530118 PMCID: PMC9028744 DOI: 10.3233/adr-210299] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 02/05/2022] [Indexed: 02/07/2023] Open
Abstract
This paper proposes a new hypothesis for Alzheimer's disease (AD)-the lipid invasion model. It argues that AD results from external influx of free fatty acids (FFAs) and lipid-rich lipoproteins into the brain, following disruption of the blood-brain barrier (BBB). The lipid invasion model explains how the influx of albumin-bound FFAs via a disrupted BBB induces bioenergetic changes and oxidative stress, stimulates microglia-driven neuroinflammation, and causes anterograde amnesia. It also explains how the influx of external lipoproteins, which are much larger and more lipid-rich, especially more cholesterol-rich, than those normally present in the brain, causes endosomal-lysosomal abnormalities and overproduction of the peptide amyloid-β (Aβ). This leads to the formation of amyloid plaques and neurofibrillary tangles, the most well-known hallmarks of AD. The lipid invasion model argues that a key role of the BBB is protecting the brain from external lipid access. It shows how the BBB can be damaged by excess Aβ, as well as by most other known risk factors for AD, including aging, apolipoprotein E4 (APOE4), and lifestyle factors such as hypertension, smoking, obesity, diabetes, chronic sleep deprivation, stress, and head injury. The lipid invasion model gives a new rationale for what we already know about AD, explaining its many associated risk factors and neuropathologies, including some that are less well-accounted for in other explanations of AD. It offers new insights and suggests new ways to prevent, detect, and treat this destructive disease and potentially other neurodegenerative diseases.
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Affiliation(s)
- Jonathan D’Arcy Rudge
- School of Biological Sciences, University of Reading, Reading, Berkshire, United Kingdom
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19
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Zhang Y, Feng X, Du M, Ding J, Liu P. Salvianolic acid B attenuates the inflammatory response in atherosclerosis by regulating MAPKs/ NF-κB signaling pathways in LDLR-/- mice and RAW264.7 cells. Int J Immunopathol Pharmacol 2022; 36:3946320221079468. [PMID: 35285334 PMCID: PMC9118216 DOI: 10.1177/03946320221079468] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Objectives: Salvianolic acid B (Sal B) is the main effective water-soluble
component of Salvia miltiorrhiza. In this study, the anti-inflammatory
effect of Sal B was explored in high-fat-diet (HFD)-induced LDLR-/- mice and oxidized
low-density-lipoprotein (ox-LDL)-induced or lipopolysaccharide (LPS)-induced RAW264.7
cells. Methods: The LDLR-/- mice were randomly divided into four groups after
12 weeks of high-fat diet. Then, the mice were administrated with 0.9% saline or Sal B
(25 mg/kg) or Atorvastatin (1.3 mg/kg) for 12 weeks. RAW 264.7 cells were induced with
ox-LDL/LPS, or ox-LDL/LPS plus different concentrations of Sal B (1.25 μg/mL, 2.5 μg/mL,
5 μg/mL), or ox-LDL plus Sal B plus MAPKs activators. ELISA was used for detecting serum
lipid profiles and inflammatory cytokines, RT-qPCR used for gene expression, Oil Red O
used for plaque sizes, and immunofluorescence staining used for NF-κB p65 and TNF-α
production. Inflammation-related proteins and MAPKs pathways were detected by Western
Blot. Results: The results showed that Sal B decreased the levels of serum
lipids (TC, TG, and LDL-C), attenuated inflammatory cytokines, and improved lipid
accumulation in the aorta. Sal B also attenuated the elevation of inflammatory cytokines
induced by ox-LDL or LPS in RAW264.7 cells, and the phosphorylation of MAPKs/NF-κB
pathways in the aorta and RAW264.7 cells, resulting in a significant decrease in the
contents of p-JNK, p-ERK 1/2, p-P38, p-IκB, and p-NF-κB p65. Conclusions: Sal
B could exert anti-inflammatory effects on atherosclerosis via MAPKs/NF-κB signaling
pathways in vivo and in vitro.
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Affiliation(s)
- Yifan Zhang
- Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiaoteng Feng
- Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Min Du
- Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jie Ding
- Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ping Liu
- Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, China
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20
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Siddiqui H, Yevstigneyev N, Madani G, McCormick S. Approaches to Visualising Endocytosis of LDL-Related Lipoproteins. Biomolecules 2022; 12:biom12020158. [PMID: 35204658 PMCID: PMC8961563 DOI: 10.3390/biom12020158] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/20/2021] [Accepted: 01/12/2022] [Indexed: 02/04/2023] Open
Abstract
Endocytosis is the process by which molecules are actively transported into cells. It can take on a variety of forms depending on the cellular machinery involved ranging from specific receptor-mediated endocytosis to the less selective and actin-driven macropinocytosis. The plasma lipoproteins, which deliver lipids and other cargo to cells, have been intensely studied with respect to their endocytic uptake. One of the first molecules to be visualised undergoing endocytosis via a receptor-mediated, clathrin-dependent pathway was low-density lipoprotein (LDL). The LDL molecule has subsequently been shown to be internalised through multiple endocytic pathways. Dissecting the pathways of lipoprotein endocytosis has been crucial to understanding the regulation of plasma lipid levels and how lipids enter cells in the arterial wall to promote atherosclerosis. It has also aided understanding of the dysregulation that occurs in plasma lipid levels when molecules involved in uptake are defective, as is the case in familial hypercholesterolemia (FH). The aim of this review is to outline the many endocytic pathways utilised for lipoprotein uptake. It explores the various experimental approaches that have been applied to visualise lipoprotein endocytosis with an emphasis on LDL and its more complex counterpart, lipoprotein(a) [Lp(a)]. Finally, we look at new developments in lipoprotein visualisation that hold promise for scrutinising endocytic pathways to finer detail in the future.
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Affiliation(s)
- Halima Siddiqui
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand; (H.S.); (N.Y.); (G.M.)
- HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
| | - Nikita Yevstigneyev
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand; (H.S.); (N.Y.); (G.M.)
- HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
| | - Golnoush Madani
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand; (H.S.); (N.Y.); (G.M.)
- HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
| | - Sally McCormick
- Department of Biochemistry, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand; (H.S.); (N.Y.); (G.M.)
- HeartOtago, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
- Correspondence:
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21
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Kotlyarov S. Diversity of Lipid Function in Atherogenesis: A Focus on Endothelial Mechanobiology. Int J Mol Sci 2021; 22:11545. [PMID: 34768974 PMCID: PMC8584259 DOI: 10.3390/ijms222111545] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/12/2021] [Accepted: 10/21/2021] [Indexed: 12/12/2022] Open
Abstract
Atherosclerosis is one of the most important problems in modern medicine. Its high prevalence and social significance determine the need for a better understanding of the mechanisms of the disease's development and progression. Lipid metabolism and its disorders are one of the key links in the pathogenesis of atherosclerosis. Lipids are involved in many processes, including those related to the mechanoreception of endothelial cells. The multifaceted role of lipids in endothelial mechanobiology and mechanisms of atherogenesis are discussed in this review. Endothelium is involved in ensuring adequate vascular hemodynamics, and changes in blood flow characteristics are detected by endothelial cells and affect their structure and function.
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Affiliation(s)
- Stanislav Kotlyarov
- Department of Nursing, Ryazan State Medical University, 390026 Ryazan, Russia
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22
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Nie JH, Shen Y, Roshdy M, Cheng X, Wang G, Yang X. Polystyrene nanoplastics exposure caused defective neural tube morphogenesis through caveolae-mediated endocytosis and faulty apoptosis. Nanotoxicology 2021; 15:885-904. [PMID: 34087085 DOI: 10.1080/17435390.2021.1930228] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Growing evidence demonstrated that bioaccumulation of polystyrene nanoplastics (PS-NPs) in various organisms including human beings caused destructive effects on health. Nanoplastics may adversely affect fetal development potentially since they can pass through the placental barrier. However, very little has been known about the embryonic toxicity of polystyrene nanoplastics, especially in embryonic neurulation, the early developmental stage of the fetus, as well as the corresponding mechanisms. In this study, we first observed that 60- or 900-nm PS-NPs (especially 60-nm PS-NPs) could cross mouse placentas and affect developing mice fetuses. To avoid the indirect adverse effects derived from the restricted placenta, we employed early chick embryos as a developmental model to evaluate direct adverse effects of PS-NPs on embryo/fetal development, revealing suppressive effects on embryo development and an increased frequency of congenital abnormalities (especially in the nervous system), including neural tube defects. Thus, we focused on the potential negative effects of PS-NPs on neurulation, the earliest stage of nervous system development. Using caveolin-1 immunofluorescent staining of SH-SY5Y cells exposed to PS-NPs-GFP, we demonstrated that PS-NPs were internalized by SH-SY5Y cells via caveolae-mediated endocytosis. Transmission electron microscopy; LC3B immunofluorescent staining; and Atg7, Atg5, p62 and LC3B western blot results revealed that autophagy was activated in SH-SY5Y cells exposed to PS-NPs. However, PS-NPs were not degraded by the autophagic-lysosomal system given the lack of LAMP1 changes and minimal PS-NPs-GFP and LAMP1 colocalization. Furthermore, the cytoplasmic accumulation of PS-NPs caused faulty apoptotic cell death in SH-SY5Y cells and the developing neural tube as revealed by c-caspase3 immunofluorescent staining. Thus, defective neural tube morphogenesis, as demonstrated by neural tube defects, occurred during embryogenesis in the context of PS-NP exposure.
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Affiliation(s)
- Jia-Hui Nie
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou, Guangdong, China.,International Joint Laboratory for Embryonic Development & Prenatal Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Yao Shen
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou, Guangdong, China.,Department of Microbiology and Immunology, Medical College, Jinan University, Guangzhou, Guangdong, China
| | - Mohamed Roshdy
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou, Guangdong, China.,International Joint Laboratory for Embryonic Development & Prenatal Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Xin Cheng
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou, Guangdong, China.,International Joint Laboratory for Embryonic Development & Prenatal Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Guang Wang
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou, Guangdong, China.,International Joint Laboratory for Embryonic Development & Prenatal Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Xuesong Yang
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou, Guangdong, China.,International Joint Laboratory for Embryonic Development & Prenatal Medicine, Jinan University, Guangzhou, Guangdong, China
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23
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Takahashi T, Huang Y, Yamamoto K, Hamano G, Kakino A, Kang F, Imaizumi Y, Takeshita H, Nozato Y, Nozato S, Yokoyama S, Nagasawa M, Kawai T, Takeda M, Fujimoto T, Hongyo K, Nakagami F, Akasaka H, Takami Y, Takeya Y, Sugimoto K, Gaisano HY, Sawamura T, Rakugi H. The endocytosis of oxidized LDL via the activation of the angiotensin II type 1 receptor. iScience 2021; 24:102076. [PMID: 33659870 PMCID: PMC7890409 DOI: 10.1016/j.isci.2021.102076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 12/06/2020] [Accepted: 01/14/2021] [Indexed: 01/14/2023] Open
Abstract
Arrestin-dependent activation of a G-protein-coupled receptor (GPCR) triggers endocytotic internalization of the receptor complex. We analyzed the interaction between the pattern recognition receptor (PRR) lectin-like oxidized low-density lipoprotein (oxLDL) receptor (LOX-1) and the GPCR angiotensin II type 1 receptor (AT1) to report a hitherto unidentified mechanism whereby internalization of the GPCR mediates cellular endocytosis of the PRR ligand. Using genetically modified Chinese hamster ovary cells, we found that oxLDL activates Gαi but not the Gαq pathway of AT1 in the presence of LOX-1. Endocytosis of the oxLDL-LOX-1 complex through the AT1-β-arrestin pathway was demonstrated by real-time imaging of the membrane dynamics of LOX-1 and visualization of endocytosis of oxLDL. Finally, this endocytotic pathway involving GPCR kinases (GRKs), β-arrestin, and clathrin is relevant in accumulating oxLDL in human vascular endothelial cells. Together, our findings indicate that oxLDL activates selective G proteins and β-arrestin-dependent internalization of AT1, whereby the oxLDL-LOX-1 complex undergoes endocytosis. The binding of oxidized LDL (oxLDL) to LOX-1 induces selective activation of AT1 oxLDL and angiotensin II additively or competitively activate AT1 in different cells oxLDL promotes β-arrestin-dependent internalization of oxLDL-LOX-1-AT1 complex
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Affiliation(s)
- Toshimasa Takahashi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Department of Medicine, University of Toronto, Toronto, Ontario M5S1A8, Canada
| | - Yibin Huang
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Koichi Yamamoto
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Corresponding author
| | - Go Hamano
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Akemi Kakino
- Department of Molecular Pathophysiology, Shinshu University Graduate School of Medicine, Matsumoto, Nagano 390-8621, Japan
| | - Fei Kang
- Department of Medicine, University of Toronto, Toronto, Ontario M5S1A8, Canada
| | - Yuki Imaizumi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hikari Takeshita
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yoichi Nozato
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Satoko Nozato
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Serina Yokoyama
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Motonori Nagasawa
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Tatsuo Kawai
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Masao Takeda
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Taku Fujimoto
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuhiro Hongyo
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Futoshi Nakagami
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Hiroshi Akasaka
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yoichi Takami
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Yasushi Takeya
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ken Sugimoto
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Herbert Y. Gaisano
- Department of Medicine, University of Toronto, Toronto, Ontario M5S1A8, Canada
| | - Tatsuya Sawamura
- Department of Molecular Pathophysiology, Shinshu University Graduate School of Medicine, Matsumoto, Nagano 390-8621, Japan
| | - Hiromi Rakugi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
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24
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Park EJ, Yoon C, Han JS, Lee GH, Kim DW, Park EJ, Lim HJ, Kang MS, Han HY, Seol HJ, Kim KP. Effect of PM10 on pulmonary immune response and fetus development. Toxicol Lett 2020; 339:1-11. [PMID: 33301788 DOI: 10.1016/j.toxlet.2020.11.024] [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: 08/27/2020] [Revised: 11/19/2020] [Accepted: 11/29/2020] [Indexed: 01/12/2023]
Abstract
Despite numerous reports that ambient particulate matter is a key determinant for human health, toxicity data produced based on physicochemical properties of particulate matters is very lack, suggesting lack of scientific evidence for regulation. In this study, we sampled inhalable particulate matters (PM10) in northern Seoul, Korea. PM10 showed atypical- and fiber-type particles with the average size and the surface charge of 1,598.1 ± 128.7 nm and -27.5 ± 2.8, respectively, and various toxic elements were detected in the water extract. On day 90 after the first pulmonary exposure, total cell number dose-dependently increased in the lungs of both sexes of mice. PM10 induced Th1-dominant immune response with pathological changes in both sexes of mice. Meanwhile, composition of total cells and expression of proteins which functions in cell-to-cell communication showed different trends between sexes. Following, male and female mice were mated to identify effects of PM10 to the next generation. PM10 remained in the lung of dams until day 21 after birth, and the levels of IgA and IgE increased in the blood of dams exposed to the maximum dose compared to control. In addition, the interval between births of fetuses, the number of offspring, the neonatal survival rate (day 4 after birth) and the sex ratio seemed to be affected at the maximum dose, and particularly, all offspring from one dam were stillborn. In addition, expression of HIF-1α protein increased in the lung tissue of dams exposed to PM10, and level of hypoxia-related proteins was notably enhanced in PM10-exposed bronchial epithelial cells compared to control. Taken together, we suggest that inhaled PM10 may induce Th1-shifting immune response in the lung, and that it may affect reproduction (fetus development) by causing lung hypoxia. Additionally, we propose that further study is needed to identify particle-size-dependent effects on development of the next generation.
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Affiliation(s)
- Eun-Jung Park
- East-West Medical Science Research Institute, Kyung Hee Medical Science Research Institute, Kyung Hee University, Seoul, Republic of Korea.
| | - Cheolho Yoon
- Seoul Center, Korea Basic Science Institute, Seoul, Republic of Korea
| | - Ji-Seok Han
- Department of Advanced Toxicology Research, Korea Institute of Toxicology, Daejeon, Republic of Korea
| | - Gwang-Hee Lee
- School of Civil, Environmental, and Architectural Engineering, Korea University, Seoul, Republic of Korea
| | - Dong-Wan Kim
- School of Civil, Environmental, and Architectural Engineering, Korea University, Seoul, Republic of Korea
| | - Eun-Jun Park
- East-West Medical Science Research Institute, Kyung Hee Medical Science Research Institute, Kyung Hee University, Seoul, Republic of Korea
| | - Hyun-Ji Lim
- East-West Medical Science Research Institute, Kyung Hee Medical Science Research Institute, Kyung Hee University, Seoul, Republic of Korea
| | - Min-Sung Kang
- General Toxicology & Research Group, Jeonbuk Branch Institute, Korea Institute of Toxicology, Jeollabuk-do, Republic of Korea
| | - Hyoung-Yun Han
- Department of Predictive Toxicology, Korea Institute of Toxicology, Daejeon, Republic of Korea
| | - Hyun-Joo Seol
- Department of Obstetrics & Gynecology, Kyung Hee University Hospital at Gangdong, Kyung Hee University, Seoul, Republic of Korea
| | - Kwang Pyo Kim
- Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials, Kyung Hee University, Yongin, Republic of Korea; Department of Biomedical Science and technology, Kyung Hee Medical Science Research Institute, Kyung Hee University, Seoul, Republic of Korea
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25
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Qiu Y, Zhou J, Zhang D, Song H, Qian L. Bile salt-dependent lipase promotes the barrier integrity of Caco-2 cells by activating Wnt/β-catenin signaling via LRP6 receptor. Cell Tissue Res 2020; 383:1077-1092. [PMID: 33245415 DOI: 10.1007/s00441-020-03316-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 09/30/2020] [Indexed: 01/13/2023]
Abstract
Bile salt-dependent lipase (BSDL) within intestinal lumen can be endocytosed by enterocytes and support the intestinal barrier function. However, the epithelial-supporting effect of this protein has not been verified in a human cell line and neither the direct signaling pathway nor the function of endocytosis in this process has been clearly identified. We sought to investigate the signaling pathway and the membrane receptor through which BSDL might exert these effects using intestinal epithelial cells. Caco-2 cells were treated with recombinant BSDL, and the barrier function, cell proliferation, and activation of the Wnt signaling pathway were assessed. The effect of Wnt signaling activation induced by BSDL and BSDL endocytosis was investigated in LRP6-silenced and non-silenced cells. Moreover, caveolae- and clathrin-dependent endocytosis inhibitors were also applied respectively to analyze their effects on Wnt signaling activation induced by BSDL. BSDL treatment increased the barrier function but not proliferation of Caco-2 cells. It also induced β-catenin nuclear translocation and activated Wnt target gene transcription. Moreover, in the Wnt pathway, BSDL increased the levels of non-phosphorylated-β-catenin (Ser33/37/Thr41) and phosphorylated-β-catenin (Ser552). Notably, the silencing of LRP6 expression impaired BSDL endocytosis and decreased BSDL-induced β-catenin nuclear translocation. The inhibition of BSDL endocytosis induced by caveolae-mediated endocytosis inhibitor was stronger than that by clathrin-mediated endocytosis inhibitor, and the Wnt signaling activation associated with its endocytosis was also most likely caveolae-dependent. Our findings suggested that LRP6, a canonical Wnt pathway co-receptor, can mediate BSDL endocytosis and then activate Wnt signaling in Caco-2 cells.
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Affiliation(s)
- Yaqi Qiu
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Jiefei Zhou
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Dandan Zhang
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Huanlei Song
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Linxi Qian
- Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
- Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China.
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26
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Li W, Yu J, Xiao X, Zang L, Yang Y, Yu J, Huang Q, Niu X, Li W. Imperatorin reduces the inflammatory response of atherosclerosis by regulating MAPKs signaling pathway in vivo and in vitro. Int Immunopharmacol 2020; 90:107170. [PMID: 33218940 DOI: 10.1016/j.intimp.2020.107170] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/22/2020] [Accepted: 10/30/2020] [Indexed: 10/23/2022]
Abstract
Inflammation plays an important role in the process of atherosclerosis (AS). Inhibition of inflammation is an effective way to prevent AS. Imperatorin (IMP) is a kind of furan coumarin with various activities. In this study, the anti-inflammatory effect of IMP was explored in oxidized low-density lipoprotein (ox-LDL)-induced VSMCs and high fat diet (HFD)-induced ApoE-/- mice. The results showed that IMP attenuated the elevation of TNF-α, IL-6, MCP-1 and NO induced by ox-LDL in supernatant of VSMCs. IMP has normalized the levels of serum lipids (TC, TG, LDL-C and HDL-C) and attenuated inflammatory cytokines in serum. IMP also improved pathological changes and lipid accumulation in aorta. Matrix metalloproteinase-2 (MMP-2) expression in aorta was down-regulated by IMP. IMP could inhibit the phosphorylation of MAPKs pathway in the aorta and VSMCs, resulting in a significant decrease in the contents of p-ERK 1/2, p-JNK and p-P38. Overall, IMP could exert anti-inflammatory effects in vivo and in vitro to interfere with AS.
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Affiliation(s)
- Wenqi Li
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Jinjin Yu
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Xin Xiao
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Lulu Zang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Yajie Yang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Jiabao Yu
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Qiuxia Huang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Xiaofeng Niu
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China
| | - Weifeng Li
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, PR China; Key Laboratory of Material Basis Analysis of Chinese Medicine, Shaanxi Administration of Traditional Chinese Medicine, Xi'an 710061, PR China.
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27
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Barreto J, Karathanasis SK, Remaley A, Sposito AC. Role of LOX-1 (Lectin-Like Oxidized Low-Density Lipoprotein Receptor 1) as a Cardiovascular Risk Predictor: Mechanistic Insight and Potential Clinical Use. Arterioscler Thromb Vasc Biol 2020; 41:153-166. [PMID: 33176449 DOI: 10.1161/atvbaha.120.315421] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Atherosclerosis, the underlying cause of cardiovascular disease (CVD), is a worldwide cause of morbidity and mortality. Reducing ApoB-containing lipoproteins-chiefly, LDL (low-density lipoprotein)-has been the main strategy for reducing CVD risk. Although supported by large randomized clinical trials, the persistence of residual cardiovascular risk after effective LDL reduction has sparked an intense search for other novel CVD biomarkers and therapeutic targets. Recently, Lox-1 (lectin-type oxidized LDL receptor 1), an innate immune scavenger receptor, has emerged as a promising target for early diagnosis and cardiovascular risk prediction and is also being considered as a treatment target. Lox-1 was first described as a 50 kDa transmembrane protein in endothelial cells responsible for oxLDL (oxidized LDL) recognition, triggering downstream pathways that intensify atherosclerosis via endothelial dysfunction, oxLDL uptake, and apoptosis. Lox-1 is also expressed in platelets, where it enhances platelet activation, adhesion to endothelial cells, and ADP-mediated aggregation, thereby favoring thrombus formation. Lox-1 was also identified in cardiomyocytes, where it was implicated in the development of cardiac fibrosis and myocyte apoptosis, the main determinants of cardiac recovery following an ischemic insult. Together, these findings have revealed that Lox-1 is implicated in all the main steps of atherosclerosis and has encouraged the development of immunoassays for measurement of sLox-1 (serum levels of soluble Lox-1) to be used as a potential CVD biomarker. Finally, the recent development of synthetic Lox-1 inhibitors and neutralizing antibodies with promising results in animal models has made Lox-1 a target for drug development. In this review, we discuss the main findings regarding the role of Lox-1 in the development, diagnosis, and therapeutic strategies for CVD prevention and treatment.
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Affiliation(s)
- Joaquim Barreto
- Atherosclerosis and Vascular Biology Lab (Atherolab), Clinical Research Center, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Brazil (J.B., A.C.S.)
| | - Sotirios K Karathanasis
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD (S.K.K., A.R.)
- NeoProgen, Baltimore, MD (S.K.K.)
| | - Alan Remaley
- National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD (S.K.K., A.R.)
| | - Andrei C Sposito
- Atherosclerosis and Vascular Biology Lab (Atherolab), Clinical Research Center, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Brazil (J.B., A.C.S.)
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28
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Luchetti F, Crinelli R, Nasoni MG, Benedetti S, Palma F, Fraternale A, Iuliano L. LDL receptors, caveolae and cholesterol in endothelial dysfunction: oxLDLs accomplices or victims? Br J Pharmacol 2020; 178:3104-3114. [PMID: 32986849 DOI: 10.1111/bph.15272] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 07/29/2020] [Accepted: 09/11/2020] [Indexed: 12/14/2022] Open
Abstract
Oxidized LDLs (oxLDLs) and oxysterols play a key role in endothelial dysfunction and the development of atherosclerosis. The loss of vascular endothelium function negatively impacts vasomotion, cell growth, adhesiveness and barrier functions. While for some of these disturbances, a reasonable explanation can be provided from a mechanistic standpoint, for many others, the molecular mediators that are involved are unknown. Caveolae, specific plasma membrane domains, have recently emerged as targets and mediators of oxLDL-induced endothelial dysfunction. Caveolae and their associated protein caveolin-1 (Cav-1) are involved in oxLDLs/LDLs transcytosis, mainly through the scavenger receptor class B type 1 (SR-B1 or SCARB1). In contrast, oxLDLs endocytosis is mediated by the lectin-like oxidized LDL receptor 1 (LOX-1), whose activity depends on an intact caveolae system. In addition, LOX-1 regulates the expression of Cav-1 and vice versa. On the other hand, oxLDLs may affect cholesterol plasma membrane content/distribution thus influencing caveolae architecture, Cav-1 localization and the associated signalling. Overall, the evidence indicate that caveolae have both active and passive roles in oxLDL-induced endothelial cell dysfunction. First, as mediators of lipid uptake and transfer in the subendothelial space and, later, as targets of changes in composition/dynamics of plasma membrane lipids resulting from increased levels of circulating oxLDLs. Gaining a better understanding of how oxLDLs interact with endothelial cells and modulate caveolae-mediated signalling pathways, leading to endothelial dysfunction, is crucial to find new targets for intervention to tackle atherosclerosis and the related clinical entities. LINKED ARTICLES: This article is part of a themed issue on Oxysterols, Lifelong Health and Therapeutics. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v178.16/issuetoc.
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Affiliation(s)
- Francesca Luchetti
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Rita Crinelli
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Maria Gemma Nasoni
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Serena Benedetti
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Francesco Palma
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | | | - Luigi Iuliano
- Department of Medico-Surgical Sciences and Biotechnologies Vascular Biology, Atherothrombosis & Mass Spectrometry, Sapienza University of Rome, Latina, Italy
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Li N, Liu S, Zhang Y, Yu L, Hu Y, Wu T, Fang M, Xu Y. Transcriptional Activation of Matricellular Protein Spondin2 (SPON2) by BRG1 in Vascular Endothelial Cells Promotes Macrophage Chemotaxis. Front Cell Dev Biol 2020; 8:794. [PMID: 32974343 PMCID: PMC7461951 DOI: 10.3389/fcell.2020.00794] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 07/28/2020] [Indexed: 12/18/2022] Open
Abstract
The matricellular protein SPON2 plays diverse roles in the development of cardiovascular diseases. SPON2 is expressed in endothelial cells, but its transcription regulation in the context of atherogenesis remains incompletely appreciated. Here we report that SPON2 expression was up-regulated by pro-atherogenic stimuli (oxLDL and TNF-α) in vascular endothelia cells. In addition, endothelial SPON2 was elevated in Apoe–/– mice fed on a Western diet compared to the control mice. Induction of SPON2 in endothelial cells by pro-atherogenic stimuli was mediated by BRG1, a chromatin remodeling protein, both in vitro and in vivo. Further analysis revealed that BRG1 interacted with the sequence-specific transcription factor Egr-1 to activate SPON2 transcription. BRG1 contributed to SPON2 trans-activation by modulating chromatin structure surrounding the SPON2 promoter. Functionally, activation of SPON2 transcription by the Egr-1/BRG1 complex provided chemoattractive cues for macrophage trafficking. SPON2 depletion abrogated the ability of BRG1 or Egr-1 to stimulate endothelial derived chemoattractive cue for macrophage migration. On the contrary, recombinant SPON2 rescued endothelial chemo-attractability in the absence of BRG1 or Egr-1. In conclusion, our data have identified a novel transcriptional cascade in endothelial cells that may potentially promote macrophage recruitment and vascular inflammation leading to atherogenesis.
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Affiliation(s)
- Nan Li
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Shuai Liu
- Hainan Provincial Key Laboratory for Tropical Cardiovascular Diseases Research and Key Laboratory of Emergency and Trauma of Ministry of Education, Institute of Cardiovascular Research of the First Affiliated Hospital, Hainan Medical University, Haikou, China.,Department of Cardiology, Kaifeng People's Hospital, Kaifeng, China
| | - Yuanyuan Zhang
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Liming Yu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yanjiang Hu
- Department of Cardiothoracic Surgery, Liyang People's Hospital, Liyang, China
| | - Teng Wu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Mingming Fang
- Department of Clinical Medicine and Laboratory Center for Experimental Medicine, Jiangsu Health Vocational Institute, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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30
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Chen B, Zhao Q, Xu T, Yu L, Zhuo L, Yang Y, Xu Y. BRG1 Activates PR65A Transcription to Regulate NO Bioavailability in Vascular Endothelial Cells. Front Cell Dev Biol 2020; 8:774. [PMID: 32903816 PMCID: PMC7443572 DOI: 10.3389/fcell.2020.00774] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 07/23/2020] [Indexed: 12/21/2022] Open
Abstract
Vascular endothelial cells contribute to the pathogenesis of cardiovascular diseases by producing and disseminating angiocrine factors. Nitric oxide (NO), catalyzed by endothelial NO synthase (eNOS), is one of the prototypical angiocrine factors. eNOS activity is modulated by site-specific phosphorylation. We have previously shown that endothelial-specific knockdown of BRG1 in Apoe–/– mice attenuates the development of atherosclerosis, in which eNOS-dependent NO catalysis plays an antagonizing role. Here we report that attenuation of atherogenesis in mice by BRG1 knockdown was accompanied by partial restoration of NO biosynthesis by 44% in the arteries and a simultaneous up-regulation of eNOS serine 1177 phosphorylation by 59%. Indeed, BRG1 depletion or inhibition ameliorated oxLDL-induced loss of NO bioavailability and eNOS phosphorylation in cultured endothelial cells. Further analysis revealed that BRG1 regulated eNOS phosphorylation and NO synthesis by activating the transcription of protein phosphatase 2A (PP2A) structural subunit a (encoded by PR65A). BRG1 interacted with ETS1, was recruited by ETS1 to the PR65A promoter, and cooperated with ETS1 to activate PR65A transcription. Finally, depletion of ETS1, similar to BRG1, repressed PR65A induction, normalized eNOS phosphorylation, and rescued NO biosynthesis in endothelial cells treated with oxLDL. In conclusion, our data characterize a novel transcriptional cascade that regulates NO bioavailability in vascular endothelial cells.
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Affiliation(s)
- Baoyu Chen
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Qianwen Zhao
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Tongchang Xu
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Liming Yu
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Lili Zhuo
- Department of Geriatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yuyu Yang
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Yong Xu
- Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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31
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Kotova A, Timonina K, Zoidl GR. Endocytosis of Connexin 36 is Mediated by Interaction with Caveolin-1. Int J Mol Sci 2020; 21:E5401. [PMID: 32751343 PMCID: PMC7432810 DOI: 10.3390/ijms21155401] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 07/25/2020] [Accepted: 07/28/2020] [Indexed: 12/22/2022] Open
Abstract
The gap junctional protein connexin 36 (Cx36) has been co-purified with the lipid raft protein caveolin-1 (Cav-1). The relevance of an interaction between the two proteins is unknown. In this study, we explored the significance of Cav-1 interaction in the context of intracellular and membrane transport of Cx36. Coimmunoprecipitation assays and Förster resonance energy transfer analysis (FRET) were used to confirm the interaction between the two proteins in the Neuro 2a cell line. We found that the Cx36 and Cav-1 interaction was dependent on the intracellular calcium levels. By employing different microscopy techniques, we demonstrated that Cav-1 enhances the vesicular transport of Cx36. Pharmacological interventions coupled with cell surface biotinylation assays and FRET analysis revealed that Cav-1 regulates membrane localization of Cx36. Our data indicate that the interaction between Cx36 and Cav-1 plays a role in the internalization of Cx36 by a caveolin-dependent pathway.
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Affiliation(s)
- Anna Kotova
- Department of Biology, York University, Toronto, ON M3J 1P3, Canada; (A.K.); (K.T.)
| | - Ksenia Timonina
- Department of Biology, York University, Toronto, ON M3J 1P3, Canada; (A.K.); (K.T.)
| | - Georg R. Zoidl
- Department of Biology, York University, Toronto, ON M3J 1P3, Canada; (A.K.); (K.T.)
- Department of Psychology, York University, Toronto, ON M3J 1P3, Canada
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32
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Imperatorin alleviates the abnormal proliferation, migration, and foaming of ox-LDL-induced VSMCs through regulating PI3K/Akt/mTOR signaling pathway. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.103982] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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33
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Kang HG, Kim JW. Effect of Minoxidil on Trabecular Outflow via the Paracellular Pathway. KOREAN JOURNAL OF OPHTHALMOLOGY 2020; 34:97-105. [PMID: 32233142 PMCID: PMC7105781 DOI: 10.3341/kjo.2019.0124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 10/25/2019] [Accepted: 11/14/2019] [Indexed: 11/23/2022] Open
Abstract
PURPOSE To investigate the pathway and effects of minoxidil on trabecular outflow in cultured human trabecular meshwork (TM) cells. METHODS After exposing primarily cultured TM cells to 0, 10, 50, or 100 μM minoxidil sulfate (MS), trabecular outflow was assessed by measuring TM cell monolayer permeability to carboxyfluorescein and transepithelial electrical resistance. To assess the pathway of permeability changes, caveolin-1, occludin, and claudin-5 levels were measured via western blot. Generation of reactive oxygen species (ROS) was measured using the dichlorofluorescein diacetate assay. To assess the involvement of nitric oxide (NO) in minoxidil-induced permeability increase, the degrees of endothelial nitric oxide synthase mRNA expression and NO production were measured with reverse transcription polymerase chain reaction and Griess assays, respectively. Permeability was also measured with co-exposure to 50 μM N-acetyl cysteine. RESULTS MS significantly increased TM cell monolayer permeability (p < 0.05) and decreased transepithelial electrical resistance (p < 0.05). MS decreased the degree of endothelial nitric oxide synthase mRNA expression but did not affect NO production. MS decreased occludin and claudin-5 levels but did not affect caveolin-1 level. MS at 100 μM increased the generation of ROS, and MS-induced permeability increase was attenuated after co-exposure to 50 μM N-acetyl cysteine. CONCLUSIONS Minoxidil may preferentially increase trabecular permeability via a paracellular pathway by downregulation of tight junction proteins. This minoxidil-induced permeability through the TM may be mediated by generation of ROS.
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Affiliation(s)
| | - Jae Woo Kim
- Department of Ophthalmology, Daegu Catholic University School of Medicine, Daegu, Korea.
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34
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Abstract
Transcytosis of macromolecules through lung endothelial cells is the primary route of transport from the vascular compartment into the interstitial space. Endothelial transcytosis is mostly a caveolae-dependent process that combines receptor-mediated endocytosis, vesicle trafficking via actin-cytoskeletal remodeling, and SNARE protein directed vesicle fusion and exocytosis. Herein, we review the current literature on caveolae-mediated endocytosis, the role of actin cytoskeleton in caveolae stabilization at the plasma membrane, actin remodeling during vesicle trafficking, and exocytosis of caveolar vesicles. Next, we provide a concise summary of experimental methods employed to assess transcytosis. Finally, we review evidence that transcytosis contributes to the pathogenesis of acute lung injury. © 2020 American Physiological Society. Compr Physiol 10:491-508, 2020.
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Affiliation(s)
- Joshua H. Jones
- Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Richard D. Minshall
- Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA,Department of Anesthesiology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA,Correspondence to
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35
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Tian J, Popal MS, Huang R, Zhang M, Zhao X, Zhang M, Song X. Caveolin as a Novel Potential Therapeutic Target in Cardiac and Vascular Diseases: A Mini Review. Aging Dis 2020; 11:378-389. [PMID: 32257548 PMCID: PMC7069461 DOI: 10.14336/ad.2019.09603] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/03/2019] [Indexed: 12/27/2022] Open
Abstract
Caveolin, a structural protein of caveolae, play roles in the regulation of endothelial function, cellular lipid homeostasis, and cardiac function by affecting the activity and biogenesis of nitric oxide, and by modulating signal transduction pathways that mediate inflammatory responses and oxidative stress. In this review, we present the role of caveolin in cardiac and vascular diseases and the relevant signaling pathways involved. Furthermore, we discuss a novel therapeutic perspective comprising crosstalk between caveolin and autophagy.
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Affiliation(s)
- Jinfan Tian
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Mohammad Sharif Popal
- 2 Department of Cardiac Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - RongChong Huang
- 3 Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing 100010, China
| | - Min Zhang
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Xin Zhao
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Mingduo Zhang
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - Xiantao Song
- 1 Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
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36
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Caveolin-1 as a critical component in the pathogenesis of lung fibrosis of different etiology: Evidences and mechanisms. Exp Mol Pathol 2019; 111:104315. [PMID: 31629729 DOI: 10.1016/j.yexmp.2019.104315] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 07/08/2019] [Accepted: 09/29/2019] [Indexed: 12/24/2022]
Abstract
Caveolin is a structural protein of flask-shaped invaginations of the plasma membrane termed as caveolae and is widely expressed on the endothelial cells, smooth muscle cells and fibroblasts in the different parts of the body including the lung tissues. The expression of caveolin-1 in the lung tissues is important to prevent the fibrogenic actions of TGF-β1 in lung fibrosis of different etiology including idiopathic pulmonary fibrosis, systemic sclerosis-associated interstitial lung disease and allergen-induced airway remodeling. Caveolin-1-mediated internalization and degradation of TGF-β1 receptors may possibly account for the decreased actions of TGF-β1. Studies have shown that the deficiency of caveolin-1 is very important in inducing lung fibrosis and its upregulation is reported to prevent lung fibrosis. The biological actions of caveolin-1 involve signaling pathways including JNK signaling, IL-4, STAT-3, miR199a-5p, CXCR4+ and CXCL12. The present review discusses the key role of caveolin and associated signaling pathways in the pathogenesis of lung fibrosis of different etiology.
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37
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Bai X, Yang X, Jia X, Rong Y, Chen L, Zeng T, Deng X, Li W, Wu G, Wang L, Li Y, Zhang J, Xiong Z, Xiong L, Wang Y, Zhu L, Zhao Y, Jin S. CAV1-CAVIN1-LC3B-mediated autophagy regulates high glucose-stimulated LDL transcytosis. Autophagy 2019; 16:1111-1129. [PMID: 31448673 DOI: 10.1080/15548627.2019.1659613] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Diabetes is a recognized high-risk factor for the development of atherosclerosis, in which macroautophagy/autophagy is emerging to play essential roles. The retention of low-density lipoprotein (LDL) particles in subendothelial space following transcytosis across the endothelium is the initial step of atherosclerosis. Here, we identified that high glucose could promote atherosclerosis by stimulating transcytosis of LDL. By inhibiting AMPK-MTOR-PIK3C3 pathway, high glucose suppresses the CAV-CAVIN-LC3B-mediated autophagic degradation of CAV1; therefore, more CAV1 is accumulated in the cytosol and utilized to form more caveolae in the cell membrane and facilitates the LDL transcytosis across endothelial cells. For a proof of concept, higher levels of lipids were accumulated in the subendothelial space of umbilical venous walls from pregnant women with gestational diabetes mellitus (GDM), compared to those of pregnant women without GDM. Our results reveal that high glucose stimulates LDL transcytosis by a novel CAV1-CAVIN1-LC3B signaling-mediated autophagic degradation pathway. ABBREVIATIONS 3-MA: 3-methyladenine; ACTB: actin beta; AMPK: AMP-activated protein kinase; Bafi: bafilomycin A1; CAV1: caveolin-1; CAVIN1: caveolae associated protein 1; CSD: the CAV1 scaffolding domain; GDM: gestational diabetes mellitus; IMD: intramembrane domain; LIR: LC3-interacting region; MAP1LC3/LC3: microtubule- associated protein 1 light chain 3; MFI: mean fluorescence intensity; MTOR: mechanistic target of rapamycin kinase; PIK3C3/VPS34: phosphatidylinositol 3-kinase catalytic subunit type 3; SQSTM1/p62: sequestosome 1.
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Affiliation(s)
- Xiangli Bai
- Department of endocrinology, Institute of geriatric medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China.,Department of laboratory medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Xiaoyan Yang
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Xiong Jia
- Department of endocrinology, Institute of geriatric medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Yueguang Rong
- Department of Pathogenic biology, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Lulu Chen
- Department of endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Tianshu Zeng
- Department of endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Xiuling Deng
- Department of endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Wenjing Li
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Guangjie Wu
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Ling Wang
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Ye Li
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Jing Zhang
- Department of laboratory medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Zhifan Xiong
- Department of endocrinology, Institute of geriatric medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Liang Xiong
- Department of laboratory medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Yumei Wang
- Department of nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Lin Zhu
- Department of endocrinology, Institute of geriatric medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Ying Zhao
- Department of endocrinology, Institute of geriatric medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
| | - Si Jin
- Department of endocrinology, Institute of geriatric medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China.,Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology , Wuhan, Hubei, China
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Ghaffari S, Naderi Nabi F, Sugiyama MG, Lee WL. Estrogen Inhibits LDL (Low-Density Lipoprotein) Transcytosis by Human Coronary Artery Endothelial Cells via GPER (G-Protein-Coupled Estrogen Receptor) and SR-BI (Scavenger Receptor Class B Type 1). Arterioscler Thromb Vasc Biol 2019; 38:2283-2294. [PMID: 30354216 DOI: 10.1161/atvbaha.118.310792] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Objective- The atheroprotective effects of estrogen are independent of circulating lipid levels. Whether estrogen regulates transcytosis of LDL (low-density lipoprotein) across the coronary endothelium is unknown. Approach and Results- Using total internal reflection fluorescence microscopy, we quantified transcytosis of LDL across human coronary artery endothelial cells from multiple donors. LDL transcytosis was significantly higher in cells from men compared with premenopausal women. Estrogen significantly attenuated LDL transcytosis by endothelial cells from male but not female donors; transcytosis of albumin was not affected. Estrogen caused downregulation of endothelial SR-BI (scavenger receptor class B type 1), and overexpression of SR-BI was sufficient to restore LDL transcytosis. Similarly, depletion of SR-BI by siRNA attenuated endothelial LDL transcytosis and prevented any further effect of estrogen. In contrast, treatment with estrogen had no effect on SR-BI expression by liver cells. Inhibition of estrogen receptors α and β had no effect on estrogen-mediated attenuation of LDL transcytosis. However, estrogen's effect on LDL transcytosis was blocked by depletion of the GPER (G-protein-coupled estrogen receptor). GPER was found to be enriched in endothelial cells compared with hepatocytes and is reported to signal via transactivation of the EGFR (epidermal growth factor receptor); inhibition of EGFR prevented the effect of estrogen on LDL transcytosis and SR-BI mRNA. Last, SR-BI expression was significantly higher in human coronary artery endothelial cells from male compared with premenopausal female donors. Conclusions- Estrogen significantly inhibits LDL transcytosis by downregulating endothelial SR-BI; this effect requires GPER.
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Affiliation(s)
- Siavash Ghaffari
- From the Keenan Centre for Biomedical Research, St. Michael's Hospital, Toronto, Canada (S.G., F.N.N., M.G.S., W.L.L.)
| | - Farnoosh Naderi Nabi
- From the Keenan Centre for Biomedical Research, St. Michael's Hospital, Toronto, Canada (S.G., F.N.N., M.G.S., W.L.L.).,Department of Laboratory Medicine and Pathobiology (F.N.N., M.G.S., W.L.L.), University of Toronto, Canada
| | - Michael G Sugiyama
- From the Keenan Centre for Biomedical Research, St. Michael's Hospital, Toronto, Canada (S.G., F.N.N., M.G.S., W.L.L.).,Department of Laboratory Medicine and Pathobiology (F.N.N., M.G.S., W.L.L.), University of Toronto, Canada
| | - Warren L Lee
- From the Keenan Centre for Biomedical Research, St. Michael's Hospital, Toronto, Canada (S.G., F.N.N., M.G.S., W.L.L.).,Department of Laboratory Medicine and Pathobiology (F.N.N., M.G.S., W.L.L.), University of Toronto, Canada.,Division of Critical Care, Department of Medicine (W.L.L.), University of Toronto, Canada.,Department of Biochemistry (W.L.L.), University of Toronto, Canada.,Institute of Medical Science (W.L.L.), University of Toronto, Canada
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39
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Schnitzler JG, Dallinga-Thie GM, Kroon J. The Role of (Modified) Lipoproteins in Vascular Function: A Duet Between Monocytes and the Endothelium. Curr Med Chem 2019; 26:1594-1609. [PMID: 29546830 DOI: 10.2174/0929867325666180316121015] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 12/05/2017] [Accepted: 12/06/2017] [Indexed: 12/24/2022]
Abstract
Over the last century, many studies have demonstrated that low-density lipoprotein (LDL) is a key risk factor of cardiovascular diseases (CVD) related to atherosclerosis. Thus, for these CVD patients, LDL lowering agents are commonly used in the clinic to reduce the risk for CVD. LDL, upon modification, will develop distinct inflammatory and proatherogenic potential, leading to impaired endothelial integrity, influx of immune cells and subsequent increased foam cell formation. LDL can also directly affect peripheral monocyte composition, rendering them in a more favorable position to migrate and accumulate in the subendothelial space. It has become apparent that other lipoprotein particles, such as triglyceride- rich lipoproteins or remnants (TRL) and lipoprotein(a) [Lp(a)] may also impact on atherogenic pathways. Evidence is accumulating that Lp(a) can promote peripheral monocyte activation, eventually leading to increased transmigration through the endothelium. Similarly, remnant cholesterol has been identified to play a key role in endothelial dysfunction and monocyte behavior. In this review, we will discuss recent developments in understanding the role of different lipoproteins in the context of inflammation at both the level of the monocyte and the endothelium.
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Affiliation(s)
- Johan G Schnitzler
- Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Geesje M Dallinga-Thie
- Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Jeffrey Kroon
- Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.,Department of Experimental Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Guo Q, Zhu Q, Miao T, Tao J, Ju X, Sun Z, Li H, Xu G, Chen H, Han L. LRP1-upregulated nanoparticles for efficiently conquering the blood-brain barrier and targetedly suppressing multifocal and infiltrative brain metastases. J Control Release 2019; 303:117-129. [DOI: 10.1016/j.jconrel.2019.04.031] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 04/12/2019] [Accepted: 04/22/2019] [Indexed: 12/31/2022]
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Li J, Li P, Zhao Y, Ma X, He R, Liang K, Zhang E. Retracted Article: MicroRNA-135a alleviates lipid accumulation and inflammation of atherosclerosis through targeting lipoprotein lipase. RSC Adv 2019; 9:28213-28221. [PMID: 35530477 PMCID: PMC9071038 DOI: 10.1039/c9ra05176g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 09/02/2019] [Indexed: 12/28/2022] Open
Abstract
MicroRNAs (miRNAs) have recently attracted increasing attention for their involvement in atherosclerosis (AS). The purpose of this study was to further explore the function and underlying mechanism of miR-135a in AS progression. The expression levels of miR-135a and lipoprotein lipase (LPL) mRNA were detected by qRT-PCR, and LPL protein expression was measured by western blotting. The levels of blood lipids and inflammatory cytokines, and LPL activity were assessed using corresponding Assay Kits, and an HPLC assay was used to determine the levels of free cholesterol (FC), total cholesterol (TC) and cholesterol ester (CE). A Dil-oxLDL binding assay was performed to evaluate the ability of cholesterol uptake. The direct interaction between miR-135a and LPL was confirmed by a dual-luciferase reporter assay and RNA immunoprecipitation assay. Our data indicated that miR-135a was downregulated in serum samples of AS patients and mice. Upregulation of miR-135a alleviated lipid metabolic disorders and inflammation in AS mice. Moreover, miR-135a negatively regulated lipid accumulation and inflammation in ox-LDL-treated THP-1 macrophages. Mechanistically, miR-135a directly targeted LPL and repressed LPL expression. LPL mediated the regulatory effect of miR-135a on lipid accumulation and inflammation in ox-LDL-treated THP-1 macrophages. In conclusion, our study indicated that miR-135a upregulation ameliorated lipid accumulation and inflammation at least partly by targeting LPL in THP-1 macrophages, highlighting miR-135a as a potential antiatherogenic agent. MicroRNAs (miRNAs) have recently attracted increasing attention for their involvement in atherosclerosis (AS).![]()
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Affiliation(s)
- Juan Li
- Department of Cardiology
- Huaihe Hospital of Henan University
- Kaifeng
- China
| | - Peng Li
- Department of Cardiology
- Huaihe Hospital of Henan University
- Kaifeng
- China
| | - Yanzhuo Zhao
- Department of Cardiology
- Huaihe Hospital of Henan University
- Kaifeng
- China
| | - Xiang Ma
- Department of Cardiology
- Huaihe Hospital of Henan University
- Kaifeng
- China
| | - Ruili He
- Department of Cardiology
- Huaihe Hospital of Henan University
- Kaifeng
- China
| | - Ketai Liang
- Department of Cardiology
- Huaihe Hospital of Henan University
- Kaifeng
- China
| | - Erwei Zhang
- Department of Cardiology
- Huaihe Hospital of Henan University
- Kaifeng
- China
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42
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Gypenoside LVI attenuates foam cell formation by promoting cholesterol export and inhibiting inflammation response. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.09.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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43
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Lin F, Pei L, Zhang Q, Han W, Jiang S, Lin Y, Dong B, Cui L, Li M. Ox-LDL induces endothelial cell apoptosis and macrophage migration by regulating caveolin-1 phosphorylation. J Cell Physiol 2018; 233:6683-6692. [PMID: 29323707 DOI: 10.1002/jcp.26468] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 01/05/2018] [Indexed: 12/16/2022]
Abstract
Oxidative low-density lipoprotein (ox-LDL) is a risk factor for atherosclerosis. Ox-LDL leads to endothelial injury in the initial stage of atherosclerosis. In this study, we investigated the role of ox-LDL in endothelial injury and macrophage recruitment. We demonstrated that ox-LDL promoted a dose-dependent phosphorylation of caveolin-1 in human umbilical vein endothelial cells. Phosphorylated caveolin-1 increased ox-LDL uptake. Intracellular accumulation of ox-LDL induced NF-κB p65 phosphorylation, promoted HMGB1 translocation from nucleus to cytoplasm and cytochrome C release from mitochondria to cytoplasm, and activated caspase 3, resulting in cell apoptosis. NF-κB activation also facilitated cavolin-1 phosphorylation and HMGB1 expression. In addition, caveolin-1 phosphorylation favored HMGB1 release and nuclear translocation of EGR1. Nuclear translocation of EGR1 contributed to cytoplasmic translocation of HMGB1. The extracellular HMGB1 induced the migration of PMBC-derived macrophages toward HUVECs in a TLR4-dependent manner. Our results suggested that ox-LDL promoted HUVECs apoptosis and macrophage recruitment by regulating caveolin-1 phosphorylation.
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Affiliation(s)
- Fei Lin
- Department of Cardiology, Shandong Energy Zibo Mining Group Co., Ltd Central Hospital, Zibo, China
| | - Likai Pei
- Department of Cardiology, Shandong Energy Zibo Mining Group Co., Ltd Central Hospital, Zibo, China
| | - Qingbin Zhang
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Weizhong Han
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Shiliang Jiang
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Yanliang Lin
- Department of Center Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Bo Dong
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Lianqun Cui
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Min Li
- Department of Cardiology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
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44
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Bai XL, Yang XY, Li JY, Ye-Li, Jia X, Xiong ZF, Wang YM, Jin S. Cavin-1 regulates caveolae-mediated LDL transcytosis: crosstalk in an AMPK/eNOS/ NF-κB/Sp1 loop. Oncotarget 2017; 8:103985-103995. [PMID: 29262615 PMCID: PMC5732781 DOI: 10.18632/oncotarget.21944] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 09/05/2017] [Indexed: 01/24/2023] Open
Abstract
Caveolae are specialized lipid rafts structure in the cell membrane and critical for regulating endothelial functions, e.g. transcytosis of macromolecules like low density lipoprotein (LDL) etc. Specifically, the organization and functions of caveolae are mediated by structure protein (caveolin-1) and adapter protein (cavin-1). The pathogenic role of caveolin-1 is well studied; nevertheless, mechanisms whereby cavin-1 regulates signaling transduction remain poorly understood. The aim of this study was designed to explore the role of cavin-1 in caveolae-mediated LDL transcytosis across endothelial cells. We reported here that cavin-1 knockdown mediated by small interfering RNA (siRNA) caused a significant decrease of LDL transcytosis. Moreover, cavin-1 knockdown increased the activity of endothelial nitric oxide synthase (eNOS) and the production of nitric oxide (NO). Consequently, an eNOS inhibitor, N-Nitro-L-Arginine Methyl Ester (L-NAME), not only suppressed the activity of specificity protein (Sp1) and nuclear factor kappa B (NF-κB), but also inhibited both activities via activating adenosine 5‘-monophosphate- activated protein kinase (AMPK). In conclusion, we proposed an AMPK/eNOS/NF-κB/Sp1 circuit loop was formed to regulate caveolae residing proteins’ expression, e.g. LDL receptor (LDLR), caveolin-1, eNOS, thereby to regulate caveolae-mediated LDL transcytosis in endothelial cells.
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Affiliation(s)
- Xiang-Li Bai
- Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430077, China.,Department of Clinical Laboratory, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430077, China
| | - Xiao-Yan Yang
- Department of Pharmacology, Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Ju-Yi Li
- Department of Pharmacology, Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Ye-Li
- Department of Pharmacology, Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Xiong Jia
- Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430077, China
| | - Zhi-Fan Xiong
- Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430077, China
| | - Yu-Mei Wang
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Si Jin
- Institute of Geriatric Medicine, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430077, China.,Department of Pharmacology, Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.,Department of Endocrinology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430077, China
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45
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Ono S, Egawa G, Kabashima K. Regulation of blood vascular permeability in the skin. Inflamm Regen 2017; 37:11. [PMID: 29259710 PMCID: PMC5725833 DOI: 10.1186/s41232-017-0042-9] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/25/2017] [Indexed: 12/31/2022] Open
Abstract
Regulation of blood vessel permeability is essential for the homeostasis of peripheral tissues. This regulation controls the trafficking of plasma contents, including water, vitamins, ions, hormones, cytokines, amyloids, lipoproteins, carrier proteins, and immunoglobulins. The properties of blood vessels vary among tissues based on their structural differences: continuous, fenestrated, or sinusoidal. These three types of blood vessels have different charge and size barrier properties. The anionic luminal glycocalyx layer on endothelial cells establishes the "charge barrier" that repels the attachment of negatively charged blood cells and plasma molecules. In contrast, the "size barrier" of blood vessels largely relies on the interendothelial junctions (IEJs) between endothelial cells, which define the paracellular permeability. As in most peripheral tissues, blood capillaries in the skin are composed of continuous and/or fenestrated blood vessels that have relatively tighter IEJs compared to those in the internal organs. Small vesicles in the capillary endothelium were discovered in the 1950s, and studies have since confirmed that blood endothelial cells transport the plasma contents by endocytosis and subsequent transcytosis and exocytosis-this process is called transcellular permeability. The permeability of blood vessels is highly variable as a result of intrinsic and extrinsic factors. It is significantly elevated upon tissue inflammations as a result of disabled IEJs and increased paracellular permeability due to inflammatory mediators. An increase in transcellular permeability during inflammation has also been postulated. Here, we provide an overview of the general properties of vascular permeability based on our recent observations of murine skin inflammation models, and we discuss its physiological significance in peripheral homeostasis.
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Affiliation(s)
- Sachiko Ono
- Department of Dermatology, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawahara, Sakyo, Kyoto, 606-8507 Japan
| | - Gyohei Egawa
- Department of Dermatology, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawahara, Sakyo, Kyoto, 606-8507 Japan
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawahara, Sakyo, Kyoto, 606-8507 Japan
- Singapore Immunology Network (SIgN) and Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore
- PRESTO, Japan Science and Technology Agency, Saitama, Japan
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46
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Pérez-Torrado R, Querol A. Saccharomyces cerevisiae show low levels of traversal across human endothelial barrier in vitro. F1000Res 2017; 6:944. [PMID: 28979764 PMCID: PMC5605952 DOI: 10.12688/f1000research.11782.2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/20/2017] [Indexed: 12/17/2022] Open
Abstract
Background: Saccharomyces cerevisiae is generally considered safe, and is involved in the production of many types of foods and dietary supplements. However, some isolates, which are genetically related to strains used in brewing and baking, have shown virulent traits, being able to produce infections in humans, mainly in immunodeficient patients. This can lead to systemic infections in humans. Methods: In this work, we studied S. cerevisiae isolates in an in vitro human endothelial barrier model, comparing their behaviour with that of several strains of the related pathogens Candida glabrata and Candida albicans. Results: The results showed that this food related yeast is able to cross the endothelial barrier in vitro. However, in contrast to C. glabrata and C. albicans, S. cerevisiae showed very low levels of traversal. Conclusions: We conclude that using an in vitro human endothelial barrier model with S. cerevisiae can be useful to evaluate the safety of S. cerevisiae strains isolated from foods.
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Affiliation(s)
- Roberto Pérez-Torrado
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
| | - Amparo Querol
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
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47
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Pérez-Torrado R, Querol A. Saccharomyces cerevisiae show low levels of traversal across the human blood brain barrier in vitro. F1000Res 2017; 6:944. [PMID: 28979764 PMCID: PMC5605952 DOI: 10.12688/f1000research.11782.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/20/2017] [Indexed: 03/28/2024] Open
Abstract
BACKGROUND Saccharomyces cerevisiae is generally considered safe, and is involved in the production of many types of foods and dietary supplements. However, some isolates, which are genetically related to strains used in brewing and baking, have shown virulent traits, being able to produce infections in humans, mainly in immunodeficient patients. This can lead to systemic infections in humans. METHODS In this work, we studied S. cerevisiae isolates in an in vitro human blood brain barrier model, comparing their behaviour with that of several strains of the related pathogens Candida glabrata and Candida albicans. RESULTS The results showed that this food related yeast is able to cross the blood brain barrier in vitro. However, in contrast to C. glabrata and C. albicans, S. cerevisiae showed very low levels of traversal. CONCLUSIONS We conclude that using an in vitro human blood brain barrier model with S. cerevisiae can be useful to evaluate the safety of S. cerevisiae strains isolated from foods.
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Affiliation(s)
- Roberto Pérez-Torrado
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
| | - Amparo Querol
- Food Biotechnology Department, Institute of Agrochemistry and Food Technology (IATA-CSIC), Paterna, Valencia, Spain
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48
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Xia XD, Zhou Z, Yu XH, Zheng XL, Tang CK. Myocardin: A novel player in atherosclerosis. Atherosclerosis 2017; 257:266-278. [DOI: 10.1016/j.atherosclerosis.2016.12.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 11/29/2016] [Accepted: 12/01/2016] [Indexed: 12/21/2022]
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49
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Cai RP, Xue YX, Huang J, Wang JH, Wang JH, Zhao SY, Guan TT, Zhang Z, Gu YT. NS1619 regulates the expression of caveolin-1 protein in a time-dependent manner via ROS/PI3K/PKB/FoxO1 signaling pathway in brain tumor microvascular endothelial cells. J Neurol Sci 2016; 369:109-118. [PMID: 27653874 DOI: 10.1016/j.jns.2016.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 08/01/2016] [Accepted: 08/02/2016] [Indexed: 12/28/2022]
Abstract
NS1619, a calcium-activated potassium channel (Kca channel) activator, can selectively and time-dependently accelerate the formation of transport vesicles in both the brain tumor capillary endothelium and tumor cells within 15min of treatment and then increase the permeability of the blood-brain tumor barrier (BTB). However, the mechanism involved is still under investigation. Using a rat brain glioma (C6) model, the expression of caveolin-1, FoxO1 and p-FoxO1 protein were examined at different time points after intracarotid infusion of NS1619 at a dose of 30μg/kg/min. Internalization of Cholera toxin subunit (CTB) labeled fluorescently was monitored by flow cytometry. The expression of caveolin-1 and FoxO1 protein at tumor microvessels was enhanced and caveolae-mediated CTB endocytosis was increased by NS1619 infusion for 15min. Compared with the 15min group, the expression of caveolin-1 protein was significantly decreased and the level of phosphorylation of FoxO1 was significantly increased in the NS1619 2h group. In addition, inhibitors of reactive oxygen species (ROS) or PI3K or PKB significantly attenuated the level of FoxO1 phosphorylation and also increased the expression of caveolin-1 protein in Human Brain Microvascular Endothelial Cells (HBMECs) cocultured with human glioma cells (U87) 2h after NS1619 treatment. This led to the conclusion that NS1619-mediated transport vesicle increase is, at least partly, related to the ROS/PI3K/PKB/FoxO1 signaling pathway.
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Affiliation(s)
- Rui-Ping Cai
- Department of Physiology, Life Science and Biopharmaceutical Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China
| | - Yi-Xue Xue
- Department of Neurobiology, College Basic of Medicine, China Medical University, Shenyang, 110001, Liaoning Province, PR China
| | - Jian Huang
- Department of Phytochemistry, Chinese Materia Medica Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China
| | - Jin-Hui Wang
- Department of Phytochemistry, Chinese Materia Medica Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China
| | - Jia-Hong Wang
- Department of Physiology, Life Science and Biopharmaceutical Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China
| | - Song-Yan Zhao
- Department of Pharmacology Experiment Center, Life Science and Biopharmaceutical Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China
| | - Ting-Ting Guan
- Department of Physiology, Life Science and Biopharmaceutical Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China
| | - Zhou Zhang
- Department of Physiology, Life Science and Biopharmaceutical Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China.
| | - Yan-Ting Gu
- Department of Physiology, Life Science and Biopharmaceutical Institution, Shenyang Pharmaceutical University, Shenyang, 110016, Liaoning Province, PR China.
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50
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Kamada C, Mukai R, Kondo A, Sato S, Terao J. Effect of quercetin and its metabolite on caveolin-1 expression induced by oxidized LDL and lysophosphatidylcholine in endothelial cells. J Clin Biochem Nutr 2016; 58:193-201. [PMID: 27257344 PMCID: PMC4865600 DOI: 10.3164/jcbn.16-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 01/14/2016] [Indexed: 01/08/2023] Open
Abstract
Oxidized low-density lipoprotein contributes to atherosclerotic plaque formation, and quercetin is expected to exert anti-atherosclerotic effects. We previously reported accumulation of conjugated quercetin metabolites in the aorta of rabbits fed high-cholesterol diets with quercetin glucosides, resulting in attenuation of lipid peroxidation and inhibition of lipid accumulation. Caveolin-1, a major structural protein of caveolae in vascular endothelial cells, plays a role in atherosclerosis development. Here we investigated effects of oxidized low-density lipoprotein, quercetin and its metabolite, quercetin 3-O-β-glucuronide, on caveolin-1 expression. Oxidized low-density lipoprotein significantly upregulated caveolin-1 mRNA expression. An oxidized low-density lipoprotein component, lysophosphatidylcholine, also induced expression of both caveolin-1 mRNA and protein. However, lysophosphatidylcholine did not affect the location of caveolin-1 proteins within caveolae structures. Co-treatment with quercetin or quercetin 3-O-β-glucuronide inhibited lysophosphatidylcholine-induced caveolin-1 expression. Quercetin and quercetin 3-O-β-glucuronide also suppressed expression of adhesion molecules induced by oxidized low-density lipoprotein and lysophosphatidylcholine. These results strongly suggest lysophosphatidylcholine derived from oxidized low-density lipoprotein contributes to atherosclerotic events by upregulating caveolin-1 expression, resulting in induction of adhesion molecules. Quercetin metabolites are likely to exert an anti-atherosclerotic effect by attenuating caveolin-1 expression in endothelial cells.
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Affiliation(s)
- Chiemi Kamada
- Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan; Training Department of Administrative Dietitians, Shikoku University, Ojin-cho Tokushima-shi, Tokushima 771-1192, Japan
| | - Rie Mukai
- Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Akari Kondo
- Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Shinya Sato
- Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
| | - Junji Terao
- Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan
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