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Panara V, Yu H, Peng D, Staxäng K, Hodik M, Filipek-Gorniok B, Kazenwadel J, Skoczylas R, Mason E, Allalou A, Harvey NL, Haitina T, Hogan BM, Koltowska K. Multiple cis-regulatory elements control prox1a expression in distinct lymphatic vascular beds. Development 2024; 151:dev202525. [PMID: 38722096 PMCID: PMC11128278 DOI: 10.1242/dev.202525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 03/21/2024] [Indexed: 05/15/2024]
Abstract
During embryonic development, lymphatic endothelial cell (LEC) precursors are distinguished from blood endothelial cells by the expression of Prospero-related homeobox 1 (Prox1), which is essential for lymphatic vasculature formation in mouse and zebrafish. Prox1 expression initiation precedes LEC sprouting and migration, serving as the marker of specified LECs. Despite its crucial role in lymphatic development, Prox1 upstream regulation in LECs remains to be uncovered. SOX18 and COUP-TFII are thought to regulate Prox1 in mice by binding its promoter region. However, the specific regulation of Prox1 expression in LECs remains to be studied in detail. Here, we used evolutionary conservation and chromatin accessibility to identify enhancers located in the proximity of zebrafish prox1a active in developing LECs. We confirmed the functional role of the identified sequences through CRISPR/Cas9 mutagenesis of a lymphatic valve enhancer. The deletion of this region results in impaired valve morphology and function. Overall, our results reveal an intricate control of prox1a expression through a collection of enhancers. Ray-finned fish-specific distal enhancers drive pan-lymphatic expression, whereas vertebrate-conserved proximal enhancers refine expression in functionally distinct subsets of lymphatic endothelium.
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Affiliation(s)
- Virginia Panara
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala 75185, Sweden
- Beijer Gene and Neuro Laboratory, Uppsala University, Uppsala 75185, Sweden
| | - Hujun Yu
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia
- Sir Peter MacCallum Department of Oncology and Department of Anatomy and Physiology, University of Melbourne, Melbourne, VIC 3000, Australia
| | - Di Peng
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala 75185, Sweden
| | - Karin Staxäng
- BioVis Core Facility, Platform EM, Uppsala University, Uppsala 75185, Sweden
| | - Monika Hodik
- BioVis Core Facility, Platform EM, Uppsala University, Uppsala 75185, Sweden
| | - Beata Filipek-Gorniok
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala 75185, Sweden
| | - Jan Kazenwadel
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5001, Australia
| | - Renae Skoczylas
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala 75185, Sweden
| | - Elizabeth Mason
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia
| | - Amin Allalou
- Uppsala University, Department of Information Technology, Division of Visual Information and Interaction, and SciLifeLab BioImage Informatics Facility, Uppsala University, Uppsala 75185, Sweden
| | - Natasha L. Harvey
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, South Australia 5001, Australia
- Adelaide Medical School, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Tatjana Haitina
- Department of Organismal Biology, Uppsala University, Uppsala 75236, Sweden
| | - Benjamin M. Hogan
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia
- Sir Peter MacCallum Department of Oncology and Department of Anatomy and Physiology, University of Melbourne, Melbourne, VIC 3000, Australia
| | - Katarzyna Koltowska
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala 75185, Sweden
- Beijer Gene and Neuro Laboratory, Uppsala University, Uppsala 75185, Sweden
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2
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Thapaliya I, Yadav J. Hypocalcaemic tetany linked to vitamin D deficiency and hypomagnesemia in primary intestinal lymphangiectasia: a literature review. Ann Med Surg (Lond) 2024; 86:2049-2057. [PMID: 38576918 PMCID: PMC10990415 DOI: 10.1097/ms9.0000000000001850] [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: 10/16/2023] [Accepted: 02/11/2024] [Indexed: 04/06/2024] Open
Abstract
Primary intestinal lymphangiectasia (PIL) is a rare disorder in children causing protein-losing enteropathy. Vitamin D deficiency and hypomagnesemia contributed to the tetany. The literature review reflects the importance of screening for these deficiencies and regular serum magnesium monitoring in PIL cases with neuromuscular or ionic abnormalities.
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3
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Stasi E, Sciascia S, Naretto C, Baldovino S, Roccatello D. Lymphatic System and the Kidney: From Lymphangiogenesis to Renal Inflammation and Fibrosis Development. Int J Mol Sci 2024; 25:2853. [PMID: 38474100 DOI: 10.3390/ijms25052853] [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: 01/05/2024] [Revised: 02/21/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024] Open
Abstract
The lymphatic kidney system plays a crucial role in managing interstitial fluid removal, regulating fluid balance, and tuning immune response. It also assists in the reabsorption of proteins, electrolytes, cytokines, growth factors, and immune cells. Pathological conditions, including tissue damage, excessive interstitial fluid, high blood glucose levels, and inflammation, can initiate lymphangiogenesis-the formation of new lymphatic vessels. This process is associated with various kidney diseases, including polycystic kidney disease, hypertension, ultrafiltration challenges, and complications post-organ transplantation. Although lymphangiogenesis has beneficial effects in removing excess fluid and immune cells, it may also contribute to inflammation and fibrosis within the kidneys. In this review, we aim to discuss the biology of the lymphatic system, from its development and function to its response to disease stimuli, with an emphasis on renal pathophysiology. Furthermore, we explore how innovative treatments targeting the lymphatic system could potentially enhance the management of kidney diseases.
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Affiliation(s)
- Elodie Stasi
- University Center of Excellence on Nephrologic, Rheumatologic and Rare Diseases (ERK-Net, ERN-Reconnect and RITA-ERN Member) with Nephrology and Dialysis Unit and Center of Immuno-Rheumatology and Rare Diseases (CMID), Coordinating Center of the Interregional Network for Rare Diseases of Piedmont and Aosta Valley, ASL Città di Torino and Department of Clinical and Biological Sciences, University of Turin, 10154 Turin, Italy
| | - Savino Sciascia
- University Center of Excellence on Nephrologic, Rheumatologic and Rare Diseases (ERK-Net, ERN-Reconnect and RITA-ERN Member) with Nephrology and Dialysis Unit and Center of Immuno-Rheumatology and Rare Diseases (CMID), Coordinating Center of the Interregional Network for Rare Diseases of Piedmont and Aosta Valley, ASL Città di Torino and Department of Clinical and Biological Sciences, University of Turin, 10154 Turin, Italy
| | - Carla Naretto
- University Center of Excellence on Nephrologic, Rheumatologic and Rare Diseases (ERK-Net, ERN-Reconnect and RITA-ERN Member) with Nephrology and Dialysis Unit and Center of Immuno-Rheumatology and Rare Diseases (CMID), Coordinating Center of the Interregional Network for Rare Diseases of Piedmont and Aosta Valley, ASL Città di Torino and Department of Clinical and Biological Sciences, University of Turin, 10154 Turin, Italy
| | - Simone Baldovino
- University Center of Excellence on Nephrologic, Rheumatologic and Rare Diseases (ERK-Net, ERN-Reconnect and RITA-ERN Member) with Nephrology and Dialysis Unit and Center of Immuno-Rheumatology and Rare Diseases (CMID), Coordinating Center of the Interregional Network for Rare Diseases of Piedmont and Aosta Valley, ASL Città di Torino and Department of Clinical and Biological Sciences, University of Turin, 10154 Turin, Italy
| | - Dario Roccatello
- University Center of Excellence on Nephrologic, Rheumatologic and Rare Diseases (ERK-Net, ERN-Reconnect and RITA-ERN Member) with Nephrology and Dialysis Unit and Center of Immuno-Rheumatology and Rare Diseases (CMID), Coordinating Center of the Interregional Network for Rare Diseases of Piedmont and Aosta Valley, ASL Città di Torino and Department of Clinical and Biological Sciences, University of Turin, 10154 Turin, Italy
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4
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Dahms P, Lyons TR. Toward Characterizing Lymphatic Vasculature in the Mammary Gland During Normal Development and Tumor-Associated Remodeling. J Mammary Gland Biol Neoplasia 2024; 29:1. [PMID: 38218743 PMCID: PMC10787674 DOI: 10.1007/s10911-023-09554-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 12/24/2023] [Indexed: 01/15/2024] Open
Abstract
Lymphatic vasculature has been shown to promote metastatic spread of breast cancer. Lymphatic vasculature, which is made up of larger collecting vessels and smaller capillaries, has specialized cell junctions that facilitate cell intravasation. Normally, these junctions are designed to collect immune cells and other cellular components for immune surveillance by lymph nodes, but they are also utilized by cancer cells to facilitate metastasis. Although lymphatic development overall in the body has been well-characterized, there has been little focus on how the lymphatic network changes in the mammary gland during stages of remodeling such as pregnancy, lactation, and postpartum involution. In this review, we aim to define the currently known lymphangiogenic factors and lymphatic remodeling events during mammary gland morphogenesis. Furthermore, we juxtapose mammary gland pubertal development and postpartum involution to show similarities of pro-lymphangiogenic signaling as well as other molecular signals for epithelial cell survival that are critical in these morphogenic stages. The similar mechanisms include involvement of M2-polarized macrophages that contribute to matrix remodeling and vasculogenesis; signal transducer and activator of transcription (STAT) survival and proliferation signaling; and cyclooxygenase 2 (COX2)/Prostaglandin E2 (PGE2) signaling to promote ductal and lymphatic expansion. Investigation and characterization of lymphangiogenesis in the normal mammary gland can provide insight to targetable mechanisms for lymphangiogenesis and lymphatic spread of tumor cells in breast cancer.
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Affiliation(s)
- Petra Dahms
- Division of Medical Oncology Senior Scientist, Young Women's Breast Cancer Translational Program, University of Colorado Cancer Center, 12801 E 17th Ave, RC1 South, Mailstop 8117, 80045, Aurora, CO, USA
- Division of Medical Oncology, Anschutz Medical Center, University of Colorado, Aurora, CO, USA
- Anschutz Medical Campus Graduate Program in Cancer Biology, University of Colorado, Aurora, USA
| | - Traci R Lyons
- Division of Medical Oncology Senior Scientist, Young Women's Breast Cancer Translational Program, University of Colorado Cancer Center, 12801 E 17th Ave, RC1 South, Mailstop 8117, 80045, Aurora, CO, USA.
- Division of Medical Oncology, Anschutz Medical Center, University of Colorado, Aurora, CO, USA.
- Anschutz Medical Campus Graduate Program in Cancer Biology, University of Colorado, Aurora, USA.
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5
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Hu Z, Zhao X, Wu Z, Qu B, Yuan M, Xing Y, Song Y, Wang Z. Lymphatic vessel: origin, heterogeneity, biological functions, and therapeutic targets. Signal Transduct Target Ther 2024; 9:9. [PMID: 38172098 PMCID: PMC10764842 DOI: 10.1038/s41392-023-01723-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 11/03/2023] [Accepted: 11/23/2023] [Indexed: 01/05/2024] Open
Abstract
Lymphatic vessels, comprising the secondary circulatory system in human body, play a multifaceted role in maintaining homeostasis among various tissues and organs. They are tasked with a serious of responsibilities, including the regulation of lymph absorption and transport, the orchestration of immune surveillance and responses. Lymphatic vessel development undergoes a series of sophisticated regulatory signaling pathways governing heterogeneous-origin cell populations stepwise to assemble into the highly specialized lymphatic vessel networks. Lymphangiogenesis, as defined by new lymphatic vessels sprouting from preexisting lymphatic vessels/embryonic veins, is the main developmental mechanism underlying the formation and expansion of lymphatic vessel networks in an embryo. However, abnormal lymphangiogenesis could be observed in many pathological conditions and has a close relationship with the development and progression of various diseases. Mechanistic studies have revealed a set of lymphangiogenic factors and cascades that may serve as the potential targets for regulating abnormal lymphangiogenesis, to further modulate the progression of diseases. Actually, an increasing number of clinical trials have demonstrated the promising interventions and showed the feasibility of currently available treatments for future clinical translation. Targeting lymphangiogenic promoters or inhibitors not only directly regulates abnormal lymphangiogenesis, but improves the efficacy of diverse treatments. In conclusion, we present a comprehensive overview of lymphatic vessel development and physiological functions, and describe the critical involvement of abnormal lymphangiogenesis in multiple diseases. Moreover, we summarize the targeting therapeutic values of abnormal lymphangiogenesis, providing novel perspectives for treatment strategy of multiple human diseases.
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Affiliation(s)
- Zhaoliang Hu
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China
| | - Xushi Zhao
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China
| | - Zhonghua Wu
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China
| | - Bicheng Qu
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China
| | - Minxian Yuan
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China
| | - Yanan Xing
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China.
| | - Yongxi Song
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China.
| | - Zhenning Wang
- Department of Surgical Oncology and General Surgery, The First Hospital of China Medical University; Key Laboratory of Precision Diagnosis and Treatment of Gastrointestinal Tumors (China Medical University), Ministry of Education, 155 North Nanjing Street, Heping District, Shenyang, 110001, China.
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6
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Payne S, Neal A, De Val S. Transcription factors regulating vasculogenesis and angiogenesis. Dev Dyn 2024; 253:28-58. [PMID: 36795082 PMCID: PMC10952167 DOI: 10.1002/dvdy.575] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 02/06/2023] [Accepted: 02/06/2023] [Indexed: 02/17/2023] Open
Abstract
Transcription factors (TFs) play a crucial role in regulating the dynamic and precise patterns of gene expression required for the initial specification of endothelial cells (ECs), and during endothelial growth and differentiation. While sharing many core features, ECs can be highly heterogeneous. Differential gene expression between ECs is essential to pattern the hierarchical vascular network into arteries, veins and capillaries, to drive angiogenic growth of new vessels, and to direct specialization in response to local signals. Unlike many other cell types, ECs have no single master regulator, instead relying on differing combinations of a necessarily limited repertoire of TFs to achieve tight spatial and temporal activation and repression of gene expression. Here, we will discuss the cohort of TFs known to be involved in directing gene expression during different stages of mammalian vasculogenesis and angiogenesis, with a primary focus on development.
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Affiliation(s)
- Sophie Payne
- Department of Physiology, Anatomy and GeneticsInstitute of Developmental and Regenerative Medicine, University of OxfordOxfordUK
| | - Alice Neal
- Department of Physiology, Anatomy and GeneticsInstitute of Developmental and Regenerative Medicine, University of OxfordOxfordUK
| | - Sarah De Val
- Department of Physiology, Anatomy and GeneticsInstitute of Developmental and Regenerative Medicine, University of OxfordOxfordUK
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7
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Michalaki E, Surya VN, Rodríguez-Hakim M, Fuller GG, Dunn AR. Response of lymphatic endothelial cells to combined spatial and temporal variations in fluid flow. FASEB J 2023; 37:e23240. [PMID: 37902497 DOI: 10.1096/fj.201902205rrrr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 09/02/2023] [Accepted: 09/22/2023] [Indexed: 10/31/2023]
Abstract
One-way valves within lymphatic vessels are required for the efficient drainage of lymphatic fluids. Fluid flow is proposed to be a key cue in regulating both the formation and maintenance of lymphatic valves. However, to our knowledge, no previous study has systematically examined the response of LECs to the complex combination of spatially and temporally varying fluid flows that occur at lymphatic valves in vivo. We built an in vitro microfluidic device that reproduces key aspects of the flow environment found at lymphatic valves. Using this device, we found that a combination of spatially and temporally varying wall shear stresses (WSSs) led to upregulated transcription of PROX1 and FOXC2. In addition, we observed that combined spatial and temporal variations in WSS-modulated Ca2+ signaling and led to increased cellular levels of NFATc1. These observations suggest that the physical cues generated by the flow environment present within lymphatic valves may act to activate key regulatory pathways that contribute to valve maintenance.
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Affiliation(s)
- Eleftheria Michalaki
- Department of Chemical Engineering, Stanford University, Stanford, California, USA
| | - Vinay N Surya
- Department of Chemical Engineering, Stanford University, Stanford, California, USA
| | | | - Gerald G Fuller
- Department of Chemical Engineering, Stanford University, Stanford, California, USA
| | - Alexander R Dunn
- Department of Chemical Engineering, Stanford University, Stanford, California, USA
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, California, USA
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8
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Taghehchian N, Lotfi M, Zangouei AS, Akhlaghipour I, Moghbeli M. MicroRNAs as the critical regulators of Forkhead box protein family during gynecological and breast tumor progression and metastasis. Eur J Med Res 2023; 28:330. [PMID: 37689738 PMCID: PMC10492305 DOI: 10.1186/s40001-023-01329-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 08/29/2023] [Indexed: 09/11/2023] Open
Abstract
Gynecological and breast tumors are one of the main causes of cancer-related mortalities among women. Despite recent advances in diagnostic and therapeutic methods, tumor relapse is observed in a high percentage of these patients due to the treatment failure. Late diagnosis in advanced tumor stages is one of the main reasons for the treatment failure and recurrence in these tumors. Therefore, it is necessary to assess the molecular mechanisms involved in progression of these tumors to introduce the efficient early diagnostic markers. Fokhead Box (FOX) is a family of transcription factors with a key role in regulation of a wide variety of cellular mechanisms. Deregulation of FOX proteins has been observed in different cancers. MicroRNAs (miRNAs) as a group of non-coding RNAs have important roles in post-transcriptional regulation of the genes involved in cellular mechanisms. They are also the non-invasive diagnostic markers due to their high stability in body fluids. Considering the importance of FOX proteins in the progression of breast and gynecological tumors, we investigated the role of miRNAs in regulation of the FOX proteins in these tumors. MicroRNAs were mainly involved in progression of these tumors through FOXM, FOXP, and FOXO. The present review paves the way to suggest a non-invasive diagnostic panel marker based on the miRNAs/FOX axis in breast and gynecological cancers.
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Affiliation(s)
- Negin Taghehchian
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Malihe Lotfi
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Sadra Zangouei
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Iman Akhlaghipour
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meysam Moghbeli
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
- Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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9
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Sato-Nishiuchi R, Doiguchi M, Morooka N, Sekiguchi K. Polydom/SVEP1 binds to Tie1 and promotes migration of lymphatic endothelial cells. J Cell Biol 2023; 222:e202208047. [PMID: 37338522 PMCID: PMC10281526 DOI: 10.1083/jcb.202208047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 04/13/2023] [Accepted: 06/05/2023] [Indexed: 06/21/2023] Open
Abstract
Polydom is an extracellular matrix protein involved in lymphatic vessel development. Polydom-deficient mice die immediately after birth due to defects in lymphatic vessel remodeling, but the mechanism involved is poorly understood. Here, we report that Polydom directly binds to Tie1, an orphan receptor in the Angiopoietin-Tie axis, and facilitates migration of lymphatic endothelial cells (LECs) in a Tie1-dependent manner. Polydom-induced LEC migration is diminished by PI3K inhibitors but not by an ERK inhibitor, suggesting that the PI3K/Akt signaling pathway is involved in Polydom-induced LEC migration. In line with this possibility, Akt phosphorylation in LECs is enhanced by Polydom although no significant Tie1 phosphorylation is induced by Polydom. LECs also exhibited nuclear exclusion of Foxo1, a signaling event downstream of Akt activation, which was impaired in Polydom-deficient mice. These findings indicate that Polydom is a physiological ligand for Tie1 and participates in lymphatic vessel development through activation of the PI3K/Akt pathway.
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Affiliation(s)
- Ryoko Sato-Nishiuchi
- Division of Matrixome Research and Application, Institute for Protein Research, Osaka University , Suita, Japan
| | - Masamichi Doiguchi
- Division of Matrixome Research and Application, Institute for Protein Research, Osaka University , Suita, Japan
| | - Nanami Morooka
- Division of Matrixome Research and Application, Institute for Protein Research, Osaka University , Suita, Japan
- Department of Medical Physiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kiyotoshi Sekiguchi
- Division of Matrixome Research and Application, Institute for Protein Research, Osaka University , Suita, Japan
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10
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Angeli V, Lim HY. Biomechanical control of lymphatic vessel physiology and functions. Cell Mol Immunol 2023; 20:1051-1062. [PMID: 37264249 PMCID: PMC10469203 DOI: 10.1038/s41423-023-01042-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/26/2023] [Accepted: 04/29/2023] [Indexed: 06/03/2023] Open
Abstract
The ever-growing research on lymphatic biology has clearly identified lymphatic vessels as key players that maintain human health through their functional roles in tissue fluid homeostasis, immunosurveillance, lipid metabolism and inflammation. It is therefore not surprising that the list of human diseases associated with lymphatic malfunctions has grown larger, including issues beyond lymphedema, a pathology traditionally associated with lymphatic drainage insufficiency. Thus, the discovery of factors and pathways that can promote optimal lymphatic functions may offer new therapeutic options. Accumulating evidence indicates that aside from biochemical factors, biomechanical signals also regulate lymphatic vessel expansion and functions postnatally. Here, we review how mechanical forces induced by fluid shear stress affect the behavior and functions of lymphatic vessels and the mechanisms lymphatic vessels employ to sense and transduce these mechanical cues into biological signals.
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Affiliation(s)
- Veronique Angeli
- Immunology Translational Research Programme, Yong Loo Lin School of Medicine, Department of Microbiology and Immunology, National University of Singapore, Singapore, Singapore.
- Immunology Programme, Life Sciences Institute, National University of Singapore, Singapore, Singapore.
| | - Hwee Ying Lim
- Immunology Translational Research Programme, Yong Loo Lin School of Medicine, Department of Microbiology and Immunology, National University of Singapore, Singapore, Singapore
- Immunology Programme, Life Sciences Institute, National University of Singapore, Singapore, Singapore
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11
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Mehrara BJ, Radtke AJ, Randolph GJ, Wachter BT, Greenwel P, Rovira II, Galis ZS, Muratoglu SC. The emerging importance of lymphatics in health and disease: an NIH workshop report. J Clin Invest 2023; 133:e171582. [PMID: 37655664 PMCID: PMC10471172 DOI: 10.1172/jci171582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
Abstract
The lymphatic system (LS) is composed of lymphoid organs and a network of vessels that transport interstitial fluid, antigens, lipids, cholesterol, immune cells, and other materials in the body. Abnormal development or malfunction of the LS has been shown to play a key role in the pathophysiology of many disease states. Thus, improved understanding of the anatomical and molecular characteristics of the LS may provide approaches for disease prevention or treatment. Recent advances harnessing single-cell technologies, clinical imaging, discovery of biomarkers, and computational tools have led to the development of strategies to study the LS. This Review summarizes the outcomes of the NIH workshop entitled "Yet to be Charted: Lymphatic System in Health and Disease," held in September 2022, with emphasis on major areas for advancement. International experts showcased the current state of knowledge regarding the LS and highlighted remaining challenges and opportunities to advance the field.
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Affiliation(s)
- Babak J. Mehrara
- Department of Plastic and Reconstructive Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Andrea J. Radtke
- Lymphocyte Biology Section and Center for Advanced Tissue Imaging, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland, USA
| | - Gwendalyn J. Randolph
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Brianna T. Wachter
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, Maryland, USA
| | - Patricia Greenwel
- Division of Digestive Diseases & Nutrition, National Institute of Diabetes and Digestive and Kidney Diseases, and
| | - Ilsa I. Rovira
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA
| | - Zorina S. Galis
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA
| | - Selen C. Muratoglu
- Division of Cardiovascular Sciences, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA
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12
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Hoofnagle MH, Hess A, Nalugo M, Ghosh S, Hughes SW, Fuchs A, Welsh JD, Kahn ML, Bochicchio GV, Randolph GJ, Leonard JM, Turnbull IR. Defects in vein valve PROX1/FOXC2 antithrombotic pathway in endothelial cells drive the hypercoagulable state induced by trauma and critical illness. J Trauma Acute Care Surg 2023; 95:197-204. [PMID: 37072887 PMCID: PMC10524206 DOI: 10.1097/ta.0000000000003945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
OBJECTIVES Deep venous thrombosis (DVT) causes significant morbidity and mortality after trauma. Recently, we have shown that blood flow patterns at vein valves induce oscillatory stress genes, which maintain an anticoagulant endothelial phenotype that inhibits spontaneous clotting at vein valves and sinuses, is lost in the presence of DVT in human pathological samples, and is dependent on expression of the transcription factor FOXC2. We describe an assay, modifying our mouse multiple injury system, which shows evidence of clinically relevant microthrombosis and hypercoagulability applicable to the study of spontaneous DVT in trauma without requiring direct vascular injury or ligation. Finally, we investigated whether these model findings are relevant to a human model of critical illness by examining gene expression changes by quantitative polymerase chain reaction and immunofluorescence in veins collected from critically ill. METHODS C57/Bl6 mice were subjected to a modified mouse multiple injury model with liver crush injury, crush and pseudofracture of a single lower extremity, and 15% total blood volume hemorrhage. Serum was assayed for d-dimer at 2, 6, 24, and 48 hours after injury by enzyme-linked immunosorbent assay. For the thrombin clotting assay, veins of the leg were exposed, 100 μL of 1 mM rhodamine (6 g) was injected retro-orbitally, and 450 μg/mL thrombin was then applied to the surface of the vein with examination of real-time clot formation via in vivo immunofluorescence microscopy. Images were then examined for percentage area of clot coverage of visible mouse saphenous and common femoral vein. Vein valve specific knockout of FOXC2 was induced with tamoxifen treatment in PROX1 Ert2Cre FOXC2 fl/fl mice as previously described. Animals were then subjected to a modified mouse multiple injury model with liver crush injury, crush and pseudofracture of a single lower extremity, and 15% total blood volume hemorrhage. Twenty-four hours after injury, we examined the valve phenotype in naive versus multiple injury animals, with and without loss of the FOXC2 gene from the vein valve (FOXC2 del ) via the thrombin assay. Images were then examined for proximity of clot formation to the valve present at the junction of the mouse saphenous, tibial, and superficial femoral vein and presence of spontaneous microthrombi present in the veins before exposure to thrombin. Human vein samples were obtained from excess tissue preserved after harvest for elective cardiac surgery and from organ donors after organ procurement. Sections were submitted for paraffin embedding and then assayed by immunofluorescence for PROX1, FOXC2, thrombomodulin, endothelial protein C receptor, and von Willebrand's factor. All animal studies were reviewed and approved by the Institutional Animal Care and Use Committee, and all human studies reviewed and approved by the institutional review board. RESULTS After mouse multiple injuries, enzyme-linked immunosorbent assay for d-dimer showed evidence of products of fibrin breakdown consistent with formation of clot related to injury, fibrinolysis, and/or microthrombosis. The thrombin clotting assay demonstrated higher percentage area of vein covered with clot when exposed to thrombin in the multiple injury animals compared with uninjured (45% vs. 27% p = 0.0002) consistent with a phenotype of hypercoagulable state after trauma in our model system. Unmanipulated FoxC2 knockout mice manifest increased clotting at the vein valve as compared with unmanipulated wild type animals. After multiple injuries, wild type mice manifest increase clotting at the vein after thrombin exposure ( p = 0.0033), and equivalent to that of valvular knockout of FoxC2 (FoxC2del), recapitulating the phenotype seen in FoxC2 knockout animals. The combination of multiple injuries and FoxC2 knockout resulted in spontaneous microthrombi in 50% of the animals, a phenotype not observed with either multiple injuries or FoxC2 deficiency alone (χ 2 , p = 0.017). Finally, human vein samples demonstrated the protective vein valve phenotype of increased FOXC2 and PROX1 and showed decreased expression in the critically ill organ donor population by immunofluorescence imaging in organ donor samples. CONCLUSION We have established a novel model of posttrauma hypercoagulation that does not require direct restriction of venous flow or direct injury to the vessel endothelium to assay for hypercoagulability and can generate spontaneous microthrombosis when combined with valve-specific FOXC2 knockout. We find that multiple injuries induce a procoagulant phenotype that recapitulates the valvular hypercoagulability seen in FOXC2 knockout and, in critically ill human specimens, find evidence for loss of oscillatory shear stress-induced gene expression of FOXC2 and PROX1 in the valvular endothelium consistent with potential loss of DVT-protective valvular phenotype.
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Affiliation(s)
- Mark H Hoofnagle
- From the Section of Acute and Critical Care Surgery, Department of Surgery (M.H.H., A.H., S.G., S.-W.H., A.F., G.V.B., J.M.L., I.R.T.), Section of Vascular Surgery, Department of Surgery (M.N.), and Department of Pathology (G.J.R.), School of Medicine, Washington University in Saint Louis, St. Louis, Missouri; Osciflex LLC (J.D.W.); and Department of Medicine (M.L.K.), Cardiovascular Institute, University of Pennsylvania, Philadelphia, Pennsylvania
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13
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Saygili Demir C, Sabine A, Gong M, Dormond O, Petrova TV. Mechanosensitive mTORC1 signaling maintains lymphatic valves. J Cell Biol 2023; 222:e202207049. [PMID: 37036444 PMCID: PMC10097975 DOI: 10.1083/jcb.202207049] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 01/26/2023] [Accepted: 03/23/2023] [Indexed: 04/11/2023] Open
Abstract
Homeostatic maintenance and repair of lymphatic vessels are essential for health. We investigated the dynamics and the molecular mechanisms of lymphatic endothelial cell (LEC) renewal in adult mesenteric quiescent lymphatic vasculature using label-retention, lineage tracing, and cell ablation strategies. Unlike during development, adult LEC turnover and proliferation was confined to the valve regions of collecting vessels, with valve cells displaying the shortest lifespan. Proliferating valve sinus LECs were the main source for maintenance and repair of lymphatic valves. We identified mechanistic target of rapamycin complex 1 (mTORC1) as a mechanoresponsive pathway activated by fluid shear stress in LECs. Depending on the shear stress level, mTORC1 activity drives division of valve cells or dictates their mechanic resilience through increased protein synthesis. Overactivation of lymphatic mTORC1 in vivo promoted supernumerary valve formation. Our work provides insights into the molecular mechanisms of maintenance of healthy lymphatic vascular system.
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Affiliation(s)
- Cansaran Saygili Demir
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
| | - Amélie Sabine
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
| | - Muyun Gong
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
| | - Olivier Dormond
- Department of Visceral Surgery, Lausanne University Hospital, Lausanne, Switzerland
| | - Tatiana V. Petrova
- Department of Oncology, Lausanne University Hospital-University of Lausanne, Lausanne, Switzerland
- Ludwig Institute for Cancer Research Lausanne, Lausanne, Switzerland
- Swiss Institute for Experimental Cancer Research, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
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14
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Kenney HM, Peng Y, de Mesy Bentley KL, Xing L, Ritchlin CT, Schwarz EM. The Enigmas of Lymphatic Muscle Cells: Where Do They Come From, How Are They Maintained, and Can They Regenerate? Curr Rheumatol Rev 2023; 19:246-259. [PMID: 36705238 PMCID: PMC10257750 DOI: 10.2174/1573397119666230127144711] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 10/29/2022] [Accepted: 12/02/2022] [Indexed: 01/28/2023]
Abstract
Lymphatic muscle cell (LMC) contractility and coverage of collecting lymphatic vessels (CLVs) are integral to effective lymphatic drainage and tissue homeostasis. In fact, defects in lymphatic contractility have been identified in various conditions, including rheumatoid arthritis, inflammatory bowel disease, and obesity. However, the fundamental role of LMCs in these pathologic processes is limited, primarily due to the difficulty in directly investigating the enigmatic nature of this poorly characterized cell type. LMCs are a unique cell type that exhibit dual tonic and phasic contractility with hybrid structural features of both vascular smooth muscle cells (VSMCs) and cardiac myocytes. While advances have been made in recent years to better understand the biochemistry and function of LMCs, central questions regarding their origins, investiture into CLVs, and homeostasis remain unanswered. To summarize these discoveries, unexplained experimental results, and critical future directions, here we provide a focused review of current knowledge and open questions related to LMC progenitor cells, recruitment, maintenance, and regeneration. We also highlight the high-priority research goal of identifying LMC-specific genes towards genetic conditional- inducible in vivo gain and loss of function studies. While our interest in LMCs has been focused on understanding lymphatic dysfunction in an arthritic flare, these concepts are integral to the broader field of lymphatic biology, and have important potential for clinical translation through targeted therapeutics to control lymphatic contractility and drainage.
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Grants
- R01AG059775,R01AG059775,R01AG059775 NIA NIH HHS
- R01AR056702,R01AR069000,T32AR076950,P30AR069655,R01AR056702,R01AR069000,P30AR069655,T32AR076950,R01AR056702,R01AR069000,T32AR076950,P30AR069655 NIAMS NIH HHS
- P30 AR069655 NIAMS NIH HHS
- R01 AR069000 NIAMS NIH HHS
- T32 GM007356 NIGMS NIH HHS
- R01 AG059775 NIA NIH HHS
- T32GM007356,T32GM007356,T32GM007356,T32GM007356 NIGMS NIH HHS
- T32 AR076950 NIAMS NIH HHS
- R01 AR056702 NIAMS NIH HHS
- F30 AG076326 NIA NIH HHS
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Affiliation(s)
- H. Mark Kenney
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Ave, Box 665, Rochester, NY, 14642, USA
- Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
| | - Yue Peng
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Ave, Box 665, Rochester, NY, 14642, USA
- Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
| | - Karen L. de Mesy Bentley
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Ave, Box 665, Rochester, NY, 14642, USA
- Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
- Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY, USA
| | - Lianping Xing
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Ave, Box 665, Rochester, NY, 14642, USA
- Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
| | - Christopher T. Ritchlin
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Ave, Box 665, Rochester, NY, 14642, USA
- Department of Medicine, Division of Allergy, Immunology, Rheumatology, University of Rochester Medical Center, Rochester, NY, USA
| | - Edward M. Schwarz
- Center for Musculoskeletal Research, University of Rochester Medical Center, 601 Elmwood Ave, Box 665, Rochester, NY, 14642, USA
- Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, Rochester, NY, USA
- Department of Medicine, Division of Allergy, Immunology, Rheumatology, University of Rochester Medical Center, Rochester, NY, USA
- Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY, USA
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15
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Liu M, Huang J, Liu T, Yuan J, Lv C, Sha Z, Wu C, Jiang W, Liu X, Nie M, Chen Y, Dong S, Qian Y, Gao C, Fan Y, Wu D, Jiang R. Exogenous interleukin 33 enhances the brain's lymphatic drainage and toxic protein clearance in acute traumatic brain injury mice. Acta Neuropathol Commun 2023; 11:61. [PMID: 37024941 PMCID: PMC10080777 DOI: 10.1186/s40478-023-01555-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/21/2023] [Indexed: 04/08/2023] Open
Abstract
The persistent dysregulation and accumulation of poisonous proteins from destructive neural tissues and cells activate pathological mechanisms after traumatic brain injury (TBI). The lymphatic drainage system of the brain, composed of the glymphatic system and meningeal lymphatic vessels (MLVs), plays an essential role in the clearance of toxic waste after brain injury. The neuroprotective effect of interleukin 33 (IL-33) in TBI mice has been demonstrated; however, its impact on brain lymphatic drainage is unclear. Here, we established a fluid percussion injury model to examine the IL-33 administration effects on neurological function and lymphatic drainage in the acute brain of TBI mice. We verified that exogenous IL-33 could improve the motor and memory skills of TBI mice and demonstrated that in the acute phase, it increased the exchange of cerebrospinal and interstitial fluid, reversed the dysregulation and depolarization of aquaporin-4 in the cortex and hippocampus, improved the drainage of MLVs to deep cervical lymph nodes, and reduced tau accumulation and glial activation. We speculate that the protective effect of exogenous IL-33 on TBI mice's motor and cognitive functions is related to the enhancement of brain lymphatic drainage and toxic metabolite clearance from the cortex and hippocampus in the acute stage. These data further support the notion that IL-33 therapy may be an effective treatment strategy for alleviating acute brain injury after TBI.
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Affiliation(s)
- Mingqi Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Jinhao Huang
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China.
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China.
| | - Tao Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Jiangyuan Yuan
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Chuanxiang Lv
- Department of Neurosurgery, The First Clinical Hospital, Jilin University, Changchun, China
| | - Zhuang Sha
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Chenrui Wu
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Weiwei Jiang
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Xuanhui Liu
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Meng Nie
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Yupeng Chen
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Shiying Dong
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Yu Qian
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Chuang Gao
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Yibing Fan
- Department of Neurosurgery, Tianjin First Central Hospital, Tianjin, China
| | - Di Wu
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China
| | - Rongcai Jiang
- Department of Neurosurgery, Tianjin Medical University General Hospital, 154 Anshan Road, Tianjin, 300052, China.
- Tianjin Neurological Institute, Key Laboratory of Post Neuro-Injury Neuro-Repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, 300052, China.
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16
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Grimm L, Mason E, Yu H, Dudczig S, Panara V, Chen T, Bower NI, Paterson S, Rondon Galeano M, Kobayashi S, Senabouth A, Lagendijk AK, Powell J, Smith KA, Okuda KS, Koltowska K, Hogan BM. Single-cell analysis of lymphatic endothelial cell fate specification and differentiation during zebrafish development. EMBO J 2023:e112590. [PMID: 36912146 DOI: 10.15252/embj.2022112590] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 01/24/2023] [Accepted: 02/03/2023] [Indexed: 03/14/2023] Open
Abstract
During development, the lymphatic vasculature forms as a second network derived chiefly from blood vessels. The transdifferentiation of embryonic venous endothelial cells (VECs) into lymphatic endothelial cells (LECs) is a key step in this process. Specification, differentiation and maintenance of LEC fate are all driven by the transcription factor Prox1, yet the downstream mechanisms remain to be elucidated. We here present a single-cell transcriptomic atlas of lymphangiogenesis in zebrafish, revealing new markers and hallmarks of LEC differentiation over four developmental stages. We further profile single-cell transcriptomic and chromatin accessibility changes in zygotic prox1a mutants that are undergoing a LEC-VEC fate shift. Using maternal and zygotic prox1a/prox1b mutants, we determine the earliest transcriptomic changes directed by Prox1 during LEC specification. This work altogether reveals new downstream targets and regulatory regions of the genome controlled by Prox1 and presents evidence that Prox1 specifies LEC fate primarily by limiting blood vascular and haematopoietic fate. This extensive single-cell resource provides new mechanistic insights into the enigmatic role of Prox1 and the control of LEC differentiation in development.
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Affiliation(s)
- Lin Grimm
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia.,Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Elizabeth Mason
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Hujun Yu
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Stefanie Dudczig
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Virginia Panara
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Tyrone Chen
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Scott Paterson
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia.,Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Maria Rondon Galeano
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Sakurako Kobayashi
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Anne Senabouth
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia.,Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Anne K Lagendijk
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Joseph Powell
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia.,Garvan Institute of Medical Research, Sydney, NSW, Australia.,School of Medical Sciences, University of New South Wales, Kensington, Sydney, NSW, Australia.,Garvan-Weizmann Centre for Cellular Genomics, Garvan Institute of Medical Research, Sydney, NSW, Australia
| | - Kelly A Smith
- Department of Anatomy and Physiology, University of Melbourne, Melbourne, VIC, Australia
| | - Kazuhide S Okuda
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia
| | - Katarzyna Koltowska
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Benjamin M Hogan
- Organogenesis and Cancer Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia.,Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, QLD, Australia.,Department of Anatomy and Physiology, University of Melbourne, Melbourne, VIC, Australia
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17
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Ruliffson BNK, Whittington CF. Regulating Lymphatic Vasculature in Fibrosis: Understanding the Biology to Improve the Modeling. Adv Biol (Weinh) 2023; 7:e2200158. [PMID: 36792967 DOI: 10.1002/adbi.202200158] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 12/19/2022] [Indexed: 02/17/2023]
Abstract
Fibrosis occurs in many chronic diseases with lymphatic vascular insufficiency (e.g., kidney disease, tumors, and lymphedema). New lymphatic capillary growth can be triggered by fibrosis-related tissue stiffening and soluble factors, but questions remain for how related biomechanical, biophysical, and biochemical cues affect lymphatic vascular growth and function. The current preclinical standard for studying lymphatics is animal modeling, but in vitro and in vivo outcomes often do not align. In vitro models can also be limited in their ability to separate vascular growth and function as individual outcomes, and fibrosis is not traditionally included in model design. Tissue engineering provides an opportunity to address in vitro limitations and mimic microenvironmental features that impact lymphatic vasculature. This review discusses fibrosis-related lymphatic vascular growth and function in disease and the current state of in vitro lymphatic vascular models while highlighting relevant knowledge gaps. Additional insights into the future of in vitro lymphatic vascular models demonstrate how prioritizing fibrosis alongside lymphatics will help capture the complexity and dynamics of lymphatics in disease. Overall, this review aims to emphasize that an advanced understanding of lymphatics within a fibrotic disease-enabled through more accurate preclinical modeling-will significantly impact therapeutic development toward restoring lymphatic vessel growth and function in patients.
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Affiliation(s)
- Brian N K Ruliffson
- Department of Biomedical Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA, 01609, USA
| | - Catherine F Whittington
- Department of Biomedical Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA, 01609, USA
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18
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A Prox1 enhancer represses haematopoiesis in the lymphatic vasculature. Nature 2023; 614:343-348. [PMID: 36697821 DOI: 10.1038/s41586-022-05650-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 12/13/2022] [Indexed: 01/26/2023]
Abstract
Transcriptional enhancer elements are responsible for orchestrating the temporal and spatial control over gene expression that is crucial for programming cell identity during development1-3. Here we describe a novel enhancer element that is important for regulating the expression of Prox1 in lymphatic endothelial cells. This evolutionarily conserved enhancer is bound by key lymphatic transcriptional regulators including GATA2, FOXC2, NFATC1 and PROX1. Genome editing of the enhancer to remove five nucleotides encompassing the GATA2-binding site resulted in perinatal death of homozygous mutant mice due to profound lymphatic vascular defects. Lymphatic endothelial cells in enhancer mutant mice exhibited reduced expression of genes characteristic of lymphatic endothelial cell identity and increased expression of genes characteristic of haemogenic endothelium, and acquired the capacity to generate haematopoietic cells. These data not only reveal a transcriptional enhancer element important for regulating Prox1 expression and lymphatic endothelial cell identity but also demonstrate that the lymphatic endothelium has haemogenic capacity, ordinarily repressed by Prox1.
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19
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c-JUN-mediated transcriptional responses in lymphatic endothelial cells are required for lung fluid clearance at birth. Proc Natl Acad Sci U S A 2023; 120:e2215449120. [PMID: 36595691 PMCID: PMC9926280 DOI: 10.1073/pnas.2215449120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Fluid clearance mediated by lymphatic vessels is known to be essential for lung inflation and gas-exchange function during the transition from prenatal to postnatal life, yet the molecular mechanisms that regulate lymphatic function remain unclear. Here, we profiled the molecular features of lymphatic endothelial cells (LECs) in embryonic and postnatal day (P) 0 lungs by single-cell RNA-sequencing analysis. We identified that the expression of c-JUN is transiently upregulated in P0 LECs. Conditional knockout of Jun in LECs impairs the opening of lung lymphatic vessels at birth, leading to fluid retention in the lungs and neonatal death. We further demonstrated that increased mechanical pressure induces the expression of c-JUN in LECs. c-JUN regulates the opening of lymphatic vessels by modulating the remodeling of the actin cytoskeleton in LECs. Our study established the essential regulatory function of c-JUN-mediated transcriptional responses in facilitating lung lymphatic fluid clearance at birth.
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Ogunsina O, Banerjee R, Knauer LA, Yang Y. Pharmacological inhibition of FOXO1 promotes lymphatic valve growth in a congenital lymphedema mouse model. Front Cell Dev Biol 2023; 10:1024628. [PMID: 36742198 PMCID: PMC9890395 DOI: 10.3389/fcell.2022.1024628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 12/01/2022] [Indexed: 01/07/2023] Open
Abstract
Mutations in many genes that regulate lymphatic valve development are associated with congenital lymphedema. Oscillatory shear stress (OSS) from lymph provides constant signals for the growth and maintenance of valve cells throughout life. The expression of valve-forming genes in lymphatic endothelial cells (LECs) is upregulated by OSS. The transcription factor FOXO1 represses lymphatic valve formation by inhibiting the expression of these genes, which makes FOXO1 a potential target for treating lymphedema. Here, we tested the ability of a FOXO1 inhibitor, AS1842856, to induce the formation of new lymphatic valves. Our quantitative RT-PCR and Western blot data showed that treatment of cultured human LECs with AS1842856 for 48 h significantly increased the expression levels of valve-forming genes. To investigate the function of AS1842856 in vivo, Foxc2 +/- mice, the mouse model for lymphedema-distichiasis, were injected with AS1842856 for 2 weeks. The valve number in AS-treated Foxc2+/- mice was significantly higher than that of the vehicle-treated Foxc2+/- mice. Furthermore, since β-catenin upregulates the expression of Foxc2 and Prox1 during lymphatic valve formation, and AS1842856 treatment increased the level of active β-catenin in both cultured human LECs and in mouse mesenteric LECs in vivo, we used the mouse model with constitutive active β-catenin to rescue loss of lymphatic valves in Foxc2 +/- mice. Foxc2 +/- mice have 50% fewer lymphatic valves than control, and rescue experiments showed that the valve number was completely restored to the control level upon nuclear β-catenin activation. These findings indicate that pharmacological inhibition of FOXO1 can be explored as a viable strategy to resolve valve defects in congenital lymphedema.
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Affiliation(s)
| | | | | | - Ying Yang
- Department of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
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21
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Wang YC, Meng WT, Zhang HF, Zhu J, Wang QL, Mou FF, Guo HD. Lymphangiogenesis, a potential treatment target for myocardial injury. Microvasc Res 2023; 145:104442. [PMID: 36206847 DOI: 10.1016/j.mvr.2022.104442] [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: 03/11/2022] [Revised: 07/26/2022] [Accepted: 09/29/2022] [Indexed: 11/07/2022]
Abstract
The lymphatic vascular system is crucial for the regulation of tissue fluid homeostasis, lipid metabolism, and immune function. Cardiac injury quickly leads to myocardial edema, cardiac lymphatic dysfunction, which ultimately results in myocardial fluid imbalance and cardiac dysfunction. Therefore, lymphangiogenesis-targeted therapy may improve the recovery of myocardial function post cardiac ischemia as observed in myocardial infarction (MI). Indeed, a promising strategy for the clinical treatment of MI relies on vascular endothelial growth factor-C (VEGF-C)-targeted therapy, which promotes lymphangiogenesis. However, much effort is needed to identify the mechanisms of lymphatic transport in response to heart disease. This article reviews regulatory factors of lymphangiogenesis, and discusses the effects of lymphangiogenesis on cardiac function after cardiac injury and its regulatory mechanisms. The involvement of stem cells on lymphangiogenesis was also discussed as stem cells could differentiate into lymphatic endothelial cells (LECs) and stimulate phenotype of LECs.
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Affiliation(s)
- Ya-Chao Wang
- Academy of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Wan-Ting Meng
- Academy of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Hai-Feng Zhang
- Department of Human Anatomy, Xuzhou Medical University, Xuzhou 221004, China
| | - Jing Zhu
- Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Qiang-Li Wang
- School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Fang-Fang Mou
- Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Hai-Dong Guo
- Academy of Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China; Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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22
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González-Hernández S, Mukouyama YS. Lymphatic vasculature in the central nervous system. Front Cell Dev Biol 2023; 11:1150775. [PMID: 37091974 PMCID: PMC10119411 DOI: 10.3389/fcell.2023.1150775] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 03/28/2023] [Indexed: 04/25/2023] Open
Abstract
The central nervous system (CNS) is considered as an immune privilege organ, based on experiments in the mid 20th century showing that the brain fails to mount an efficient immune response against an allogeneic graft. This suggests that in addition to the presence of the blood-brain barrier (BBB), the apparent absence of classical lymphatic vasculature in the CNS parenchyma limits the capacity for an immune response. Although this view is partially overturned by the recent discovery of the lymphatic-like hybrid vessels in the Schlemm's canal in the eye and the lymphatic vasculature in the outmost layer of the meninges, the existence of lymphatic vessels in the CNS parenchyma has not been reported. Two potential mechanisms by which lymphatic vasculature may arise in the organs are: 1) sprouting and invasion of lymphatic vessels from the surrounding tissues into the parenchyma and 2) differentiation of blood endothelial cells into lymphatic endothelial cells in the parenchyma. Considering these mechanisms, we here discuss what causes the dearth of lymphatic vessels specifically in the CNS parenchyma.
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23
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Liu X, Cui K, Wu H, Li KS, Peng Q, Wang D, Cowan DB, Dixon JB, Srinivasan RS, Bielenberg DR, Chen K, Wang DZ, Chen Y, Chen H. Promoting Lymphangiogenesis and Lymphatic Growth and Remodeling to Treat Cardiovascular and Metabolic Diseases. Arterioscler Thromb Vasc Biol 2023; 43:e1-e10. [PMID: 36453280 PMCID: PMC9780193 DOI: 10.1161/atvbaha.122.318406] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/15/2022] [Indexed: 12/03/2022]
Abstract
Lymphatic vessels are low-pressure, blind-ended tubular structures that play a crucial role in the maintenance of tissue fluid homeostasis, immune cell trafficking, and dietary lipid uptake and transport. Emerging research has indicated that the promotion of lymphatic vascular growth, remodeling, and function can reduce inflammation and diminish disease severity in several pathophysiologic conditions. In particular, recent groundbreaking studies have shown that lymphangiogenesis, which describes the formation of new lymphatic vessels from the existing lymphatic vasculature, can be beneficial for the alleviation and resolution of metabolic and cardiovascular diseases. Therefore, promoting lymphangiogenesis represents a promising therapeutic approach. This brief review summarizes the most recent findings related to the modulation of lymphatic function to treat metabolic and cardiovascular diseases such as obesity, myocardial infarction, atherosclerosis, and hypertension. We also discuss experimental and therapeutic approaches to enforce lymphatic growth and remodeling as well as efforts to define the molecular and cellular mechanisms underlying these processes.
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Affiliation(s)
- Xiaolei Liu
- Lemole Center for Integrated Lymphatics Research, Department of Cardiovascular Sciences, Lewis Katz School of Medicine, Temple University, Philadelphia, PA
| | - Kui Cui
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
| | - Hao Wu
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
| | - Kathryn S. Li
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
| | - Qianman Peng
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
| | - Donghai Wang
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
| | - Douglas B. Cowan
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
| | - J. Brandon Dixon
- George W. Woodruff School of Mechanical Engineering, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA
| | - R. Sathish Srinivasan
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK
| | - Diane R. Bielenberg
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
| | - Kaifu Chen
- Department of Cardiology, Boston Children’s Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA
| | - Da-Zhi Wang
- USF Heart Institute, Center for Regenerative Medicine, College of Medicine Internal Medicine, University of South Florida, Tampa, FL
| | - Yabing Chen
- Department of Pathology, Birmingham Veterans Affairs Medical Center, University of Alabama at Birmingham, Birmingham, AL
| | - Hong Chen
- Vascular Biology Program, Department of Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA
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24
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Hargadon KM, Goodloe TB, Lloyd ND. Oncogenic functions of the FOXC2 transcription factor: a hallmarks of cancer perspective. Cancer Metastasis Rev 2022; 41:833-852. [PMID: 35701636 DOI: 10.1007/s10555-022-10045-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 06/06/2022] [Indexed: 01/25/2023]
Abstract
Epigenetic regulation of gene expression is a fundamental determinant of molecular and cellular function, and epigenetic reprogramming in the context of cancer has emerged as one of the key enabling characteristics associated with acquisition of the core hallmarks of this disease. As such, there has been renewed interest in studying the role of transcription factors as epigenetic regulators of gene expression in cancer. In this review, we discuss the current state of knowledge surrounding the oncogenic functions of FOXC2, a transcription factor that frequently becomes dysregulated in a variety of cancer types. In addition to highlighting the clinical impact of aberrant FOXC2 activity in cancer, we discuss mechanisms by which this transcription factor becomes dysregulated in both tumor and tumor-associated cells, placing particular emphasis on the ways in which FOXC2 promotes key hallmarks of cancer progression. Finally, we bring attention to important issues related to the oncogenic dysregulation of FOXC2 that must be addressed going forward in order to improve our understanding of FOXC2-mediated cancer progression and to guide prognostic and therapeutic applications of this knowledge in clinical settings.
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Affiliation(s)
- Kristian M Hargadon
- Hargadon Laboratory, Department of Biology, Hampden-Sydney College, Hampden-Sydney, VA, 23943, USA.
| | - Travis B Goodloe
- Hargadon Laboratory, Department of Biology, Hampden-Sydney College, Hampden-Sydney, VA, 23943, USA
| | - Nathaniel D Lloyd
- Hargadon Laboratory, Department of Biology, Hampden-Sydney College, Hampden-Sydney, VA, 23943, USA
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25
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Xu Y, Cheng L, Yuan L, Yi Q, Xiao L, Chen H. Progress on Brain and Ocular Lymphatic System. BIOMED RESEARCH INTERNATIONAL 2022; 2022:6413553. [PMID: 36425338 PMCID: PMC9681545 DOI: 10.1155/2022/6413553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/11/2022] [Accepted: 10/26/2022] [Indexed: 02/06/2024]
Abstract
In recent years, 2 major discoveries have modified the traditional understanding of the brain. First, meningeal lymphatic vessels (MLV) were found in the dural sinus, which may absorb and drain cerebrospinal fluid (CSF). Second, the glymphatic system was discovered, composed of para-arterial CSF influx channel, paravenous interstitial fluid (ISF) efflux channel, and the water channel aquaporin-4 (AQP4) in astrocytes connecting the 2 channels. Accumulating evidence demonstrates that the lymphatic system of the brain plays a vital role within the circulation of CSF and, therefore, in the removal of metabolites. Therefore, it is involved in the incidence and development of some central nervous system (CNS) diseases. The optic nerve and retina are the extension of the CNS in the orbit. Whether they have a lymphatic system and how they clear the metabolites of the optic nerve and retina are still unclear. Recent studies have found that the ocular lymphatic system has a crucial impact on bounding eye diseases, like disorders of the optic nerve and retina. Therefore, here we review the recent research progress concerning the structure and function of MLV and glymphatic system. We also discuss the biomarkers for identification of lymphatic vessels, the composition of ocular lymphatic systems, and the possible association with diseases.
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Affiliation(s)
- Yang Xu
- Eye School of Chengdu University of TCM, Chengdu, China
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, China
| | - Lu Cheng
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
| | - Lu Yuan
- Eye School of Chengdu University of TCM, Chengdu, China
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, China
| | - Qianya Yi
- Eye School of Chengdu University of TCM, Chengdu, China
- Key Laboratory of Sichuan Province Ophthalmopathy Prevention & Cure and Visual Function Protection, China
| | - Liuyi Xiao
- University of Electronic Science and Technology of China, Chengdu, China
| | - Hui Chen
- Eye School of Chengdu University of TCM, Chengdu, China
- Department of Ophthalmology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Ocular Fundus Diseases, Shanghai, China
- National Clinical Research Center for Eye Diseases, Shanghai, China
- University of Electronic Science and Technology of China, Chengdu, China
- University of Shanghai for Science and Technology, Shanghai, China
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26
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Ujiie N, Kume T. Mechanical forces in lymphatic vessel development: Focus on transcriptional regulation. Front Physiol 2022; 13:1066460. [PMID: 36439271 PMCID: PMC9685408 DOI: 10.3389/fphys.2022.1066460] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 10/26/2022] [Indexed: 11/11/2022] Open
Abstract
The lymphatic system is crucial for the maintenance of interstitial fluid and protein homeostasis. It has important roles in collecting excess plasma and interstitial fluid leaked from blood vessels, lipid absorption and transportation in the digestive system, and immune surveillance and response. The development of lymphatic vessels begins during fetal life as lymphatic endothelial progenitor cells first differentiate into lymphatic endothelial cells (LECs) by expressing the master lymphatic vascular regulator, prospero-related homeobox 1 (PROX1). The lymphatic vasculature forms a hierarchical network that consists of blind-ended and unidirectional vessels. Although much progress has been made in the elucidation of the cellular and molecular mechanisms underlying the formation of the lymphatic vascular system, the causes of lymphatic vessel abnormalities and disease are poorly understood and complicated; specifically, the mechanistic basis for transcriptional dysregulation in lymphatic vessel development remains largely unclear. In this review, we discuss the recent advances in our understanding of the molecular and cellular mechanisms of lymphatic vascular development, including LEC differentiation, lymphangiogenesis, and valve formation, and the significance of mechanical forces in lymphatic vessels, with a focus on transcriptional regulation. We also summarize the current knowledge on epigenetic mechanisms of lymphatic gene expression.
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27
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Recouvreux MS, Miao J, Gozo MC, Wu J, Walts AE, Karlan BY, Orsulic S. FOXC2 Promotes Vasculogenic Mimicry in Ovarian Cancer. Cancers (Basel) 2022; 14:4851. [PMID: 36230774 PMCID: PMC9564305 DOI: 10.3390/cancers14194851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/27/2022] [Accepted: 09/29/2022] [Indexed: 11/16/2022] Open
Abstract
FOXC2 is a forkhead family transcription factor that plays a critical role in specifying mesenchymal cell fate during embryogenesis. FOXC2 expression is associated with increased metastasis and poor survival in various solid malignancies. Using in vitro and in vivo assays in mouse ovarian cancer cell lines, we confirmed the previously reported mechanisms by which FOXC2 could promote cancer growth, metastasis, and drug resistance, including epithelial-mesenchymal transition, stem cell-like differentiation, and resistance to anoikis. In addition, we showed that FOXC2 expression is associated with vasculogenic mimicry in mouse and human ovarian cancers. FOXC2 overexpression increased the ability of human ovarian cancer cells to form vascular-like structures in vitro, while inhibition of FOXC2 had the opposite effect. Thus, we present a novel mechanism by which FOXC2 might contribute to cancer aggressiveness and poor patient survival.
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Affiliation(s)
- Maria Sol Recouvreux
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Jiangyong Miao
- Department of Pathology, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Maricel C. Gozo
- Women’s Cancer Program, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Jingni Wu
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Ann E. Walts
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Beth Y. Karlan
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Sandra Orsulic
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
- Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, CA 90095, USA
- Veterans Administration Greater Los Angeles Healthcare System, Los Angeles, CA 90095, USA
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28
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Janardhan HP, Dresser K, Hutchinson L, Trivedi CM. Pathological MAPK activation-mediated lymphatic basement membrane disruption causes lymphangiectasia that is treatable with ravoxertinib. JCI Insight 2022; 7:153033. [PMID: 36073544 PMCID: PMC9536262 DOI: 10.1172/jci.insight.153033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 07/27/2022] [Indexed: 11/17/2022] Open
Abstract
Lymphangiectasia, an anomalous dilation of lymphatic vessels first described in the 17th century, is frequently associated with chylous effusion, respiratory failure, and high mortality in young patients, yet the underlying molecular pathogenesis and effective treatments remain elusive. Here, we identify an unexpected causal link between MAPK activation and defective development of the lymphatic basement membrane that drives lymphangiectasia. Human pathological tissue samples from patients diagnosed with lymphangiectasia revealed sustained MAPK activation within lymphatic endothelial cells. Endothelial KRASG12D-mediated sustained MAPK activation in newborn mice caused severe pulmonary and intercostal lymphangiectasia, accumulation of chyle in the pleural space, and complete lethality. Pathological activation of MAPK in murine vasculature inhibited the Nfatc1-dependent genetic program required for laminin interactions, collagen crosslinking, and anchoring fibril formation, driving defective development of the lymphatic basement membrane. Treatment with ravoxertinib, a pharmacological inhibitor of MAPK, reverses nuclear-to-cytoplasmic localization of Nfatc1, basement membrane development defects, lymphangiectasia, and chyle accumulation, ultimately improving survival of endothelial KRAS mutant neonatal mice. These results reveal defective lymphatic basement membrane assembly and composition as major causes of thoracic lymphangiectasia and provide a potential treatment.
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Affiliation(s)
| | | | | | - Chinmay M Trivedi
- Division of Cardiovascular Medicine.,Department of Medicine.,Department of Molecular, Cell, and Cancer Biology, and.,Li-Weibo Institute for Rare Diseases Research, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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29
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Scallan JP, Jannaway M. Lymphatic Vascular Permeability. Cold Spring Harb Perspect Med 2022; 12:cshperspect.a041274. [PMID: 35879102 PMCID: PMC9380735 DOI: 10.1101/cshperspect.a041274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Blood vessels have a regulated permeability to fluid and solutes, which allows for the delivery of nutrients and signaling molecules to all cells in the body, a process essential to life. The lymphatic vasculature is the second network of vessels in the body, making up part of the immune system, yet is not typically thought of as having a permeability to fluid and solute. However, the major function of the lymphatic vasculature is to regulate tissue fluid balance to prevent edema, so lymphatic vessels must be permeable to absorb and transport fluid efficiently. Only recently were lymphatic vessels discovered to be permeable, which has had many functional implications. In this review, we will provide an overview of what is known about lymphatic vascular permeability, discuss the biophysical and signaling mechanisms regulating lymphatic permeability, and examine the disease relevance of this new property of lymphatic vessels.
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Affiliation(s)
- Joshua P Scallan
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida 33612, USA
| | - Melanie Jannaway
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida 33612, USA
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30
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Geng X, Srinivasan RS. Molecular Mechanisms Driving Lymphedema and Other Lymphatic Anomalies. Cold Spring Harb Perspect Med 2022; 12:a041272. [PMID: 35817543 PMCID: PMC9341459 DOI: 10.1101/cshperspect.a041272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Lymphatic vasculature regulates fluid homeostasis by absorbing interstitial fluid and returning it to blood. Lymphatic vasculature is also critical for lipid absorption and inflammatory response. Lymphatic vasculature is composed of lymphatic capillaries, collecting lymphatic vessels, lymphatic valves, and lymphovenous valves. Defects in any of these structures could lead to lymphatic anomalies such as lymphedema, cystic lymphatic malformation, and Gorham-Stout disease. Basic research has led to a deeper understanding of the stepwise development of the lymphatic vasculature. VEGF-C and shear stress signaling pathways have evolved as critical regulators of lymphatic vascular development. Loss-of-function and gain-of-function mutations in genes that are involved in these signaling pathways are associated with lymphatic anomalies. Importantly, drugs that target these molecules are showing outstanding efficacy in treating certain lymphatic anomalies. In this article, we summarize these exciting developments and highlight the future challenges.
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Affiliation(s)
- Xin Geng
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma 73013, USA
| | - R Sathish Srinivasan
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma 73013, USA
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73117, USA
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31
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Li X, Qi L, Yang D, Hao S, Zhang F, Zhu X, Sun Y, Chen C, Ye J, Yang J, Zhao L, Altmann DM, Cao S, Wang H, Wei B. Meningeal lymphatic vessels mediate neurotropic viral drainage from the central nervous system. Nat Neurosci 2022; 25:577-587. [PMID: 35524140 DOI: 10.1038/s41593-022-01063-z] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 03/24/2022] [Indexed: 01/13/2023]
Abstract
Recent studies have demonstrated that brain meningeal lymphatic vessels (MLVs) act as a drainage path directly into the cervical lymph nodes (CLNs) for macromolecules contained in the cerebrospinal fluid (CSF). However, the role of MLVs during CNS viral infection remains unexplored. Here, we found that infection with several neurotropic viruses in mice promotes MLV expansion but also causes impaired MLV-mediated drainage of macromolecules. Notably, MLVs could drain virus from the CNS to CLNs. Surgical ligation of the lymph vessels or photodynamic ablation of dorsal MLVs increased neurological damage and mortality of virus-infected mice. By contrast, pretreatment with vascular endothelial growth factor C promoted expansion of functional MLVs and alleviated the effects of viral infection. Together, these data indicate that functional MLVs facilitate virus clearance, and MLVs represent a critical path for virus spreading from the CNS to the CLNs. MLV-based therapeutic strategies may thus be useful for alleviating infection-induced neurological damage.
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Affiliation(s)
- Xiaojing Li
- Institute of Geriatrics, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), School of Medicine, Shanghai University, Nantong, China.,Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai, China.,Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China.,State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, China
| | - Linlin Qi
- Institute of Geriatrics, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), School of Medicine, Shanghai University, Nantong, China.,Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai, China.,State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, China
| | - Dan Yang
- Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai, China.,State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, China
| | - ShuJie Hao
- Institute of Geriatrics, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), School of Medicine, Shanghai University, Nantong, China.,Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai, China
| | - Fang Zhang
- Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai, China.,Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China.,State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, China
| | - Xingguo Zhu
- Institute of Geriatrics, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), School of Medicine, Shanghai University, Nantong, China.,Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai, China
| | - Yue Sun
- School of Life Sciences, Peking University, Beijing, China
| | - Chen Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Jing Ye
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Jing Yang
- School of Life Sciences, Peking University, Beijing, China
| | - Ling Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Daniel M Altmann
- Department of Immunology and Inflammation, Imperial College, Faculty of Medicine, Hammersmith Hospital, London, UK
| | - Shengbo Cao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, China
| | - Hongyan Wang
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China. .,School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China.
| | - Bin Wei
- Institute of Geriatrics, Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong), School of Medicine, Shanghai University, Nantong, China. .,Shanghai Engineering Research Center of Organ Repair, School of Life Sciences, Shanghai University, Shanghai, China. .,Cancer Center, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China. .,State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Wuhan, China.
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32
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Byrne AB, Brouillard P, Sutton DL, Kazenwadel J, Montazaribarforoushi S, Secker GA, Oszmiana A, Babic M, Betterman KL, Brautigan PJ, White M, Piltz SG, Thomas PQ, Hahn CN, Rath M, Felbor U, Korenke GC, Smith CL, Wood KH, Sheppard SE, Adams DM, Kariminejad A, Helaers R, Boon LM, Revencu N, Moore L, Barnett C, Haan E, Arts P, Vikkula M, Scott HS, Harvey NL. Pathogenic variants in MDFIC cause recessive central conducting lymphatic anomaly with lymphedema. Sci Transl Med 2022; 14:eabm4869. [PMID: 35235341 DOI: 10.1126/scitranslmed.abm4869] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Central conducting lymphatic anomaly (CCLA), characterized by the dysfunction of core collecting lymphatic vessels including the thoracic duct and cisterna chyli, and presenting as chylothorax, pleural effusions, chylous ascites, and lymphedema, is a severe disorder often resulting in fetal or perinatal demise. Although pathogenic variants in RAS/mitogen activated protein kinase (MAPK) signaling pathway components have been documented in some patients with CCLA, the genetic etiology of the disorder remains uncharacterized in most cases. Here, we identified biallelic pathogenic variants in MDFIC, encoding the MyoD family inhibitor domain containing protein, in seven individuals with CCLA from six independent families. Clinical manifestations of affected fetuses and children included nonimmune hydrops fetalis (NIHF), pleural and pericardial effusions, and lymphedema. Generation of a mouse model of human MDFIC truncation variants revealed that homozygous mutant mice died perinatally exhibiting chylothorax. The lymphatic vasculature of homozygous Mdfic mutant mice was profoundly mispatterned and exhibited major defects in lymphatic vessel valve development. Mechanistically, we determined that MDFIC controls collective cell migration, an important early event during the formation of lymphatic vessel valves, by regulating integrin β1 activation and the interaction between lymphatic endothelial cells and their surrounding extracellular matrix. Our work identifies MDFIC variants underlying human lymphatic disease and reveals a crucial, previously unrecognized role for MDFIC in the lymphatic vasculature. Ultimately, understanding the genetic and mechanistic basis of CCLA will facilitate the development and implementation of new therapeutic approaches to effectively treat this complex disease.
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Affiliation(s)
- Alicia B Byrne
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia.,Clinical and Health Sciences, University of South Australia, 5001 Adelaide, Australia
| | - Pascal Brouillard
- Human Molecular Genetics, de Duve Institute, University of Louvain, 1200 Brussels, Belgium
| | - Drew L Sutton
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | - Jan Kazenwadel
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | | | - Genevieve A Secker
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | - Anna Oszmiana
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | - Milena Babic
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia.,Department of Genetics and Molecular Pathology, SA Pathology, 5000 Adelaide, Australia
| | - Kelly L Betterman
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | - Peter J Brautigan
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia.,Department of Genetics and Molecular Pathology, SA Pathology, 5000 Adelaide, Australia
| | - Melissa White
- Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia.,Genome Editing Program, South Australian Health and Medical Research Institute, 5000 Adelaide, Australia.,South Australian Genome Editing Facility, University of Adelaide, 5005 Adelaide, Australia
| | - Sandra G Piltz
- Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia.,Genome Editing Program, South Australian Health and Medical Research Institute, 5000 Adelaide, Australia.,South Australian Genome Editing Facility, University of Adelaide, 5005 Adelaide, Australia
| | - Paul Q Thomas
- Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia.,Genome Editing Program, South Australian Health and Medical Research Institute, 5000 Adelaide, Australia.,South Australian Genome Editing Facility, University of Adelaide, 5005 Adelaide, Australia
| | - Christopher N Hahn
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia.,Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia.,Department of Genetics and Molecular Pathology, SA Pathology, 5000 Adelaide, Australia.,ACRF Cancer Genomics Facility, Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | - Matthias Rath
- Department of Human Genetics, University Medicine Greifswald and Interfaculty Institute of Genetics and Functional Genomics, University of Greifswald, 17489 Greifswald, Germany
| | - Ute Felbor
- Department of Human Genetics, University Medicine Greifswald and Interfaculty Institute of Genetics and Functional Genomics, University of Greifswald, 17489 Greifswald, Germany
| | - G Christoph Korenke
- Department of Neuropediatrics, University Children's Hospital, Klinikum Oldenburg, 26133 Oldenburg, Germany
| | - Christopher L Smith
- Jill and Mark Fishman Center for Lymphatic Disorders, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA.,Division of Cardiology, Children's Hospital of Philadelphia and Department of Pediatrics Perelman School of Medicine at The University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Kathleen H Wood
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Sarah E Sheppard
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Denise M Adams
- Vascular Anomalies Centre, Division of Haematology/Oncology, Cancer and Blood Disorders Centre, Boston Children's Hospital, Boston, PA 02115, USA
| | | | - Raphael Helaers
- Human Molecular Genetics, de Duve Institute, University of Louvain, 1200 Brussels, Belgium
| | - Laurence M Boon
- Human Molecular Genetics, de Duve Institute, University of Louvain, 1200 Brussels, Belgium.,Center for Vascular Anomalies, Division of Plastic Surgery, VASCERN VASCA European Reference Centre, Cliniques Universitaires Saint-Luc and University of Louvain, 1200 Brussels, Belgium
| | - Nicole Revencu
- Center for Vascular Anomalies, Division of Plastic Surgery, VASCERN VASCA European Reference Centre, Cliniques Universitaires Saint-Luc and University of Louvain, 1200 Brussels, Belgium.,Centre for Human Genetics, Cliniques Universitaires Saint-Luc and University of Louvain, 1200 Brussels, Belgium
| | - Lynette Moore
- Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia.,Anatomical Pathology, SA Pathology, 5000 Adelaide, Australia
| | - Christopher Barnett
- Paediatric and Reproductive Genetics Unit, South Australian Clinical Genetics Service, Women's and Children's Hospital, 5006 Adelaide, South Australia, Australia
| | - Eric Haan
- Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia
| | - Peer Arts
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | - Miikka Vikkula
- Human Molecular Genetics, de Duve Institute, University of Louvain, 1200 Brussels, Belgium.,Center for Vascular Anomalies, Division of Plastic Surgery, VASCERN VASCA European Reference Centre, Cliniques Universitaires Saint-Luc and University of Louvain, 1200 Brussels, Belgium.,Centre for Human Genetics, Cliniques Universitaires Saint-Luc and University of Louvain, 1200 Brussels, Belgium.,Walloon Excellence in Life Sciences and Biotechnology, University of Louvain, 1200 Brussels, Belgium
| | - Hamish S Scott
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia.,Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia.,Department of Genetics and Molecular Pathology, SA Pathology, 5000 Adelaide, Australia.,ACRF Cancer Genomics Facility, Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia
| | - Natasha L Harvey
- Centre for Cancer Biology, University of South Australia and SA Pathology, 5001 Adelaide, Australia.,Adelaide Medical School, University of Adelaide, 5005 Adelaide, Australia
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33
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Friess MC, Kritikos I, Schineis P, Medina-Sanchez JD, Gkountidi AO, Vallone A, Sigmund EC, Schwitter C, Vranova M, Matti C, Arasa J, Saygili Demir C, Bovay E, Proulx ST, Tomura M, Rot A, Legler DF, Petrova TV, Halin C. Mechanosensitive ACKR4 scavenges CCR7 chemokines to facilitate T cell de-adhesion and passive transport by flow in inflamed afferent lymphatics. Cell Rep 2022; 38:110334. [PMID: 35108538 DOI: 10.1016/j.celrep.2022.110334] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 12/02/2021] [Accepted: 01/12/2022] [Indexed: 11/03/2022] Open
Abstract
T cell migration via afferent lymphatics to draining lymph nodes (dLNs) depends on expression of CCR7 in T cells and CCL21 in the lymphatic vasculature. Once T cells have entered lymphatic capillaries, they slowly migrate into contracting collecting vessels. Here, lymph flow picks up, inducing T cell detachment and rapid transport to the dLNs. We find that the atypical chemokine receptor 4 (ACKR4), which binds and internalizes CCL19 and CCL21, is induced by lymph flow in endothelial cells lining lymphatic collectors, enabling them to scavenge these chemokines. In the absence of ACKR4, migration of T cells to dLNs in TPA-induced inflammation is significantly reduced. While entry into capillaries is not impaired, T cells accumulate in the ACKR4-deficient dermal collecting vessel segments. Overall, our findings identify an ACKR4-mediated mechanism by which lymphatic collectors facilitate the detachment of lymph-borne T cells in inflammation and their transition from crawling to free-flow toward the dLNs.
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Affiliation(s)
- Mona C Friess
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Ioannis Kritikos
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Philipp Schineis
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | | | | | - Angela Vallone
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Elena C Sigmund
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Corina Schwitter
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Martina Vranova
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Christoph Matti
- Biotechnology Institute Thurgau (BITg) at the University of Konstanz, Kreuzlingen, Switzerland
| | - Jorge Arasa
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Cansaran Saygili Demir
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research, Lausanne, Epalinges, Switzerland
| | - Esther Bovay
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research, Lausanne, Epalinges, Switzerland
| | - Steven T Proulx
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland; Theodor Kocher Institute, University of Bern, Bern, Switzerland
| | | | - Antal Rot
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK; Centre for Inflammation and Therapeutic Innovation, Queen Mary University London, London, UK; Institute for Cardiovascular Prevention, Ludwig-Maximilians University, Munich, Germany
| | - Daniel F Legler
- Biotechnology Institute Thurgau (BITg) at the University of Konstanz, Kreuzlingen, Switzerland; Theodor Kocher Institute, University of Bern, Bern, Switzerland; Faculty of Biology, University of Konstanz, Konstanz, Germany
| | - Tatiana V Petrova
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research, Lausanne, Epalinges, Switzerland
| | - Cornelia Halin
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland.
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Abstract
Adipose tissue, once thought to be an inert receptacle for energy storage, is now recognized as a complex tissue with multiple resident cell populations that actively collaborate in response to diverse local and systemic metabolic, thermal, and inflammatory signals. A key participant in adipose tissue homeostasis that has only recently captured broad scientific attention is the lymphatic vasculature. The lymphatic system's role in lipid trafficking and mediating inflammation makes it a natural partner in regulating adipose tissue, and evidence supporting a bidirectional relationship between lymphatics and adipose tissue has accumulated in recent years. Obesity is now understood to impair lymphatic function, whereas altered lymphatic function results in aberrant adipose tissue deposition, though the molecular mechanisms governing these phenomena have yet to be fully elucidated. We will review our current understanding of the relationship between adipose tissue and the lymphatic system here, focusing on known mechanisms of lymphatic-adipose crosstalk.
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Affiliation(s)
- Gregory P Westcott
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
- Joslin Diabetes Center, Boston, MA 02215, USA
- Harvard Medical School, Boston, MA 02215, USA
| | - Evan D Rosen
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
- Harvard Medical School, Boston, MA 02215, USA
- Broad Institute, Cambridge, MA 02142, USA
- Correspondence: Evan D. Rosen, MD, PhD, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA.
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35
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Czepielewski RS, Erlich EC, Onufer EJ, Young S, Saunders BT, Han YH, Wohltmann M, Wang PL, Kim KW, Kumar S, Hsieh CS, Scallan JP, Yang Y, Zinselmeyer BH, Davis MJ, Randolph GJ. Ileitis-associated tertiary lymphoid organs arise at lymphatic valves and impede mesenteric lymph flow in response to tumor necrosis factor. Immunity 2021; 54:2795-2811.e9. [PMID: 34788601 PMCID: PMC8678349 DOI: 10.1016/j.immuni.2021.10.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 08/09/2021] [Accepted: 10/05/2021] [Indexed: 12/16/2022]
Abstract
Lymphangitis and the formation of tertiary lymphoid organs (TLOs) in the mesentery are features of Crohn's disease. Here, we examined the genesis of these TLOs and their impact on disease progression. Whole-mount and intravital imaging of the ileum and ileum-draining collecting lymphatic vessels (CLVs) draining to mesenteric lymph nodes from TNFΔARE mice, a model of ileitis, revealed TLO formation at valves of CLVs. TLOs obstructed cellular and molecular outflow from the gut and were sites of lymph leakage and backflow. Tumor necrosis factor (TNF) neutralization begun at early stages of TLO formation restored lymph transport. However, robustly developed, chronic TLOs resisted regression and restoration of flow after TNF neutralization. TNF stimulation of cultured lymphatic endothelial cells reprogrammed responses to oscillatory shear stress, preventing the induction of valve-associated genes. Disrupted transport of immune cells, driven by loss of valve integrity and TLO formation, may contribute to the pathology of Crohn's disease.
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Affiliation(s)
- Rafael S Czepielewski
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Emma C Erlich
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Emily J Onufer
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Shannon Young
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Brian T Saunders
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Yong-Hyun Han
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Mary Wohltmann
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Peter L Wang
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Ki-Wook Kim
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Shashi Kumar
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Chyi-Song Hsieh
- Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Joshua P Scallan
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL 33612, USA
| | - Ying Yang
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL 33612, USA
| | - Bernd H Zinselmeyer
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Michael J Davis
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, MO 65212, USA
| | - Gwendalyn J Randolph
- Department of Pathology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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36
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Oliver G. Lymphatic endothelial cell fate specification in the mammalian embryo: An historical perspective. Dev Biol 2021; 482:44-54. [PMID: 34915023 DOI: 10.1016/j.ydbio.2021.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 02/06/2023]
Abstract
Development of the mammalian lymphatic vasculature is a stepwise process requiring the specification of lymphatic endothelial cell progenitors in the embryonic veins, and their subsequent budding to give rise to most of the mature lymphatic vasculature. In mice, formation of the lymphatic vascular network starts inside the cardinal vein at around E9.5 when a subpopulation of venous endothelial cells gets committed into the lymphatic lineage by their acquisition of Prox1 expression. Identification of critical genes regulating lymphatic development facilitated the detailed cellular and molecular characterization of some of the cellular and molecular mechanisms regulating the early steps leading to the formation of the mammalian lymphatic vasculature. A better understanding of basic aspects of early lymphatic development, and the availability of novel tools and animal models has been instrumental in the identification of important novel functional roles of this vasculature network.
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Affiliation(s)
- Guillermo Oliver
- Center for Vascular and Developmental Biology, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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37
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Qin L, Zhang H, Li B, Jiang Q, Lopez F, Min W, Zhou JH. CCM3 Loss-Induced Lymphatic Defect Is Mediated by the Augmented VEGFR3-ERK1/2 Signaling. Arterioscler Thromb Vasc Biol 2021; 41:2943-2960. [PMID: 34670407 PMCID: PMC8613000 DOI: 10.1161/atvbaha.121.316707] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Cerebral cavernous malformations (CCMs) can happen anywhere in the body, although they most commonly produce symptoms in the brain. The role of CCM genes in other vascular beds outside the brain and retina is not well-examined, although the 3 CCM-associated genes (CCM1, CCM2, and CCM3) are ubiquitously expressed in all tissues. We aimed to determine the role of CCM gene in lymphatics. Approach and Results: Mice with an inducible pan-endothelial cell (EC) or lymphatic EC deletion of Ccm3 (Pdcd10ECKO or Pdcd10LECKO) exhibit dilated lymphatic capillaries and collecting vessels with abnormal valve structure. Morphological alterations were correlated with lymphatic dysfunction in Pdcd10LECKO mice as determined by Evans blue dye and fluorescein isothiocyanate(FITC)-dextran transport assays. Pdcd10LECKO lymphatics had increased VEGFR3 (vascular endothelial growth factor receptor-3)-ERK1/2 (extracellular signal-regulated kinase 1/2) signaling with lymphatic hyperplasia. Mechanistic studies suggested that VEGFR3 is primarily regulated at a transcriptional level in Ccm3-deficient lymphatic ECs, in an NF-κB (nuclear factor κB)-dependent manner. CCM3 binds to importin alpha 2/KPNA2 (karyopherin subunit alpha 2), and a CCM3 deletion releases KPNA2 to activate NF-κB P65 by facilitating its nuclear translocation and P65-dependent VEGFR3 transcription. Moreover, increased VEGFR3 in lymphatic EC preferentially activates ERK1/2 signaling, which is critical for lymphatic EC proliferation. Importantly, inhibition of VEGFR3 or ERK1/2 rescued the lymphatic defects in structure and function. CONCLUSIONS Our data demonstrate that CCM3 deletion augments the VEGFR3-ERK1/2 signaling in lymphatic EC that drives lymphatic hyperplasia and malformation and warrant further investigation on the potential clinical relevance of lymphatic dysfunction in patients with CCM.
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MESH Headings
- Animals
- Apoptosis Regulatory Proteins/genetics
- Cells, Cultured
- Endothelial Cells/physiology
- Endothelium, Lymphatic/pathology
- Endothelium, Lymphatic/physiopathology
- Female
- Gene Deletion
- Hemangioma, Cavernous, Central Nervous System/pathology
- Hemangioma, Cavernous, Central Nervous System/physiopathology
- Hyperplasia
- MAP Kinase Signaling System/physiology
- Male
- Mice, Inbred Strains
- Models, Animal
- NF-kappa B/genetics
- Translocation, Genetic
- Vascular Endothelial Growth Factor Receptor-3/metabolism
- Mice
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Affiliation(s)
- Lingfeng Qin
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT
| | - Haifeng Zhang
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT
| | - Busu Li
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT
| | - Quan Jiang
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT
| | - Francesc Lopez
- Yale Center for Genome Analysis, Cancer Department of Genetics, Yale University School of Medicine, New Haven, CT
| | - Wang Min
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT
| | - Jenny Huanjiao Zhou
- Interdepartmental Program in Vascular Biology and Therapeutics, Department of Pathology, Yale University School of Medicine, New Haven, CT
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38
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Niimi K, Nakae J, Inagaki S, Furuyama T. FOXO1 represses lymphatic valve formation and maintenance via PRDM1. Cell Rep 2021; 37:110048. [PMID: 34852224 DOI: 10.1016/j.celrep.2021.110048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 09/13/2021] [Accepted: 11/02/2021] [Indexed: 01/17/2023] Open
Abstract
Intraluminal lymphatic valves (LVs) contribute to the prevention of lymph backflow and maintain circulatory homeostasis. Several reports have investigated the molecular mechanisms which promote LV formation; however, the way in which they are suppressed is not completely clear. We show that the forkhead transcription factor FOXO1 is a suppressor of LV formation and maintenance in lymphatic endothelial cells. Oscillatory shear stress by bidirectional flow inactivates FOXO1 via Akt phosphorylation, resulting in the upregulation of a subset of LV-specific genes mediated by downregulation of a transcriptional repressor, PRDM1. Mice with an endothelial-specific Foxo1 deletion have an increase in LVs, and overexpression of Foxo1 in mice produces a decrease in LVs. Genetic reduction of PRDM1 rescues the decrease in LV by Foxo1 overexpression. In conclusion, FOXO1 plays a critical role in lymph flow homeostasis by preventing excess LV formation. This gene might be a therapeutic target for lymphatic circulatory abnormalities.
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Affiliation(s)
- Kenta Niimi
- Department of Liberal Arts and Sciences, Kagawa Prefectural University of Health Sciences, Hara 281-1, Mure, Takamatsu, Kagawa 761-0123, Japan
| | - Jun Nakae
- Department of Physiology, International University of Health and Welfare School of Medicine, 4-3 Kozu-no-Mori, Narita 286-8686, Japan
| | - Shinobu Inagaki
- United Graduate School of Child Development, Osaka University, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan; Department of Physical Therapy, Osaka Yukioka College of Health Science, Sojiji 1-1-41, Ibaraki, Osaka 567-0801, Japan
| | - Tatsuo Furuyama
- Department of Liberal Arts and Sciences, Kagawa Prefectural University of Health Sciences, Hara 281-1, Mure, Takamatsu, Kagawa 761-0123, Japan.
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39
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Tabrizi ZB, Ahmed NS, Horder JL, Storr SJ, Benest AV. Transcription Factor Control of Lymphatic Quiescence and Maturation of Lymphatic Neovessels in Development and Physiology. Front Physiol 2021; 12:672987. [PMID: 34795596 PMCID: PMC8593113 DOI: 10.3389/fphys.2021.672987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 09/30/2021] [Indexed: 11/25/2022] Open
Abstract
The lymphatic system is a vascular system comprising modified lymphatic endothelial cells, lymph nodes and other lymphoid organs. The system has diverse, but critical functions in both physiology and pathology, and forms an interface between the blood vascular and immune system. It is increasingly evident that remodelling of the lymphatic system occurs alongside remodelling of the blood microvascular system, which is now considered a hallmark of most pathological conditions as well as being critical for normal development. Much attention has focussed on how the blood endothelium undergoes phenotypic switching in development and disease, resulting in over two decades of research to probe the mechanisms underlying the resulting heterogeneity. The lymphatic system has received less attention, and consequently there are fewer descriptions of functional and molecular heterogeneity, but differential transcription factor activity is likely an important control mechanism. Here we introduce and discuss significant transcription factors of relevance to coordinating cellular responses during lymphatic remodelling as the lymphatic endothelium dynamically changes from quiescence to actively remodelling.
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Affiliation(s)
- Zarah B Tabrizi
- Endothelial Quiescence Group, University of Nottingham, Nottingham, United Kingdom
| | - Nada S Ahmed
- Endothelial Quiescence Group, University of Nottingham, Nottingham, United Kingdom
| | - Joseph L Horder
- Endothelial Quiescence Group, University of Nottingham, Nottingham, United Kingdom
| | - Sarah J Storr
- Nottingham Breast Cancer Research Centre, Centre for Cancer Sciences School of Medicine, Biodiscovery Institute, University of Nottingham, Nottingham, United Kingdom
| | - Andrew V Benest
- Endothelial Quiescence Group, University of Nottingham, Nottingham, United Kingdom
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40
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Single-Cell RNA Sequencing Reveals Heterogeneity and Functional Diversity of Lymphatic Endothelial Cells. Int J Mol Sci 2021; 22:ijms222111976. [PMID: 34769408 PMCID: PMC8584409 DOI: 10.3390/ijms222111976] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/30/2021] [Accepted: 11/03/2021] [Indexed: 02/07/2023] Open
Abstract
Lymphatic endothelial cells (LECs) line the lymphatic vasculature and play a central role in the immune response. LECs have abilities to regulate immune transport, to promote immune cell survival, and to cross present antigens to dendritic cells. Single-cell RNA sequencing (scRNA) technology has accelerated new discoveries in the field of lymphatic vascular biology. This review will summarize these new findings in regard to embryonic development, LEC heterogeneity with associated functional diversity, and interactions with other cells. Depending on the organ, location in the lymphatic vascular tree, and micro-environmental conditions, LECs feature unique properties and tasks. Furthermore, adjacent stromal cells need the support of LECs for fulfilling their tasks in the immune response, such as immune cell transport and antigen presentation. Although aberrant lymphatic vasculature has been observed in a number of chronic inflammatory diseases, the knowledge on LEC heterogeneity and functional diversity in these diseases is limited. Combining scRNA sequencing data with imaging and more in-depth functional experiments will advance our knowledge of LECs in health and disease. Building the case, the LEC could be put forward as a new therapeutic target in chronic inflammatory diseases, counterweighting the current immune-cell focused therapies.
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41
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Shin M, Lawson ND. Back and forth: History of and new insights on the vertebrate lymphatic valve. Dev Growth Differ 2021; 63:523-535. [PMID: 34716915 PMCID: PMC9299638 DOI: 10.1111/dgd.12757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/12/2021] [Accepted: 10/18/2021] [Indexed: 12/26/2022]
Abstract
Lymphatic valves develop from pre‐existing endothelial cells through a step‐wise process involving complex changes in cell shape and orientation, along with extracellular matrix interactions, to form two intraluminal leaflets. Once formed, valves prevent back‐flow within the lymphatic system to ensure drainage of interstitial fluid back into the circulatory system, thereby serving a critical role in maintaining fluid homeostasis. Despite the extensive anatomical characterization of lymphatic systems across numerous genus and species dating back several hundred years, valves were largely thought to be phylogenetically restricted to mammals. Accordingly, most insights into molecular and genetic mechanisms involved in lymphatic valve development have derived from mouse knockouts, as well as rare diseases in humans. However, we have recently used a combination of imaging and genetic analysis in the zebrafish to demonstrate that valves are a conserved feature of the teleost lymphatic system. Here, we provide a historical overview of comparative lymphatic valve anatomy together with recent efforts to define molecular pathways that contribute to lymphatic valve morphogenesis. Finally, we integrate our findings in zebrafish with previous work and highlight the benefits that this model provides for investigating lymphatic valve development.
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Affiliation(s)
- Masahiro Shin
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, Massachusetts, USA
| | - Nathan D Lawson
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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42
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Feng X, Du M, Zhang Y, Ding J, Wang Y, Liu P. The Role of Lymphangiogenesis in Coronary Atherosclerosis. Lymphat Res Biol 2021; 20:290-301. [PMID: 34714136 DOI: 10.1089/lrb.2021.0026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Lymphatic circulation, a one-way channel system independent of blood circulation, collects interstitial fluid in a blind-end way. Existing widely in various organs and tissues, lymphatic vessels play important roles in maintaining tissue fluid homeostasis, regulating immune function, and promoting lipid transport. Recent studies have shown clear evidence that lymphangiogenesis has a strong mutual effect on coronary atherosclerosis (AS). In this study, we focus on this topic, especially in the aspects of relevant ligand/receptor, inflammation, and adipose metabolism. For the moment, however, the role of lymphangiogenesis and remodeling in coronary AS still remains controversial. The studies of our group and accumulating published evidence show that the pathological remodeling of lymphatic vessels in coronary AS may have a negative effect, but normal functional lymphangiogenesis is probably beneficial to the regression of coronary AS. Thus, the conclusion of this review is that lymphatic vessel function rather than its quantity determines its influence in AS, which needs more evidence to support.
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Affiliation(s)
- Xiaoteng Feng
- Department of Cardiology, LongHua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Min Du
- Department of Cardiology, LongHua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yifan Zhang
- Department of Cardiology, LongHua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jie Ding
- Department of Cardiology, LongHua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yiru Wang
- Department of Cardiology, LongHua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ping Liu
- Department of Cardiology, LongHua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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43
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Martin-Almedina S, Mortimer PS, Ostergaard P. Development and physiological functions of the lymphatic system: insights from human genetic studies of primary lymphedema. Physiol Rev 2021; 101:1809-1871. [PMID: 33507128 DOI: 10.1152/physrev.00006.2020] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Primary lymphedema is a long-term (chronic) condition characterized by tissue lymph retention and swelling that can affect any part of the body, although it usually develops in the arms or legs. Due to the relevant contribution of the lymphatic system to human physiology, while this review mainly focuses on the clinical and physiological aspects related to the regulation of fluid homeostasis and edema, clinicians need to know that the impact of lymphatic dysfunction with a genetic origin can be wide ranging. Lymphatic dysfunction can affect immune function so leading to infection; it can influence cancer development and spread, and it can determine fat transport so impacting on nutrition and obesity. Genetic studies and the development of imaging techniques for the assessment of lymphatic function have enabled the recognition of primary lymphedema as a heterogenic condition in terms of genetic causes and disease mechanisms. In this review, the known biological functions of several genes crucial to the development and function of the lymphatic system are used as a basis for understanding normal lymphatic biology. The disease conditions originating from mutations in these genes are discussed together with a detailed clinical description of the phenotype and the up-to-date knowledge in terms of disease mechanisms acquired from in vitro and in vivo research models.
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Affiliation(s)
- Silvia Martin-Almedina
- Molecular and Clinical Sciences Institute, St. George's University of London, London, United Kingdom
| | - Peter S Mortimer
- Molecular and Clinical Sciences Institute, St. George's University of London, London, United Kingdom
- Dermatology and Lymphovascular Medicine, St. George's Universities NHS Foundation Trust, London, United Kingdom
| | - Pia Ostergaard
- Molecular and Clinical Sciences Institute, St. George's University of London, London, United Kingdom
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44
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Desai SB, Iacobas I, Rockson SG. Lymphatic Development and Implications for Diagnosis and Therapy. Lymphat Res Biol 2021; 19:31-35. [PMID: 33625891 DOI: 10.1089/lrb.2020.0123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The lymphatic system was first described in the 17th century independently by Olaus Rudbeck and Thomas Bartholin. Since then, there has been deep-seated fascination with its development, function, and dysfunction.
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Affiliation(s)
- Sudhen B Desai
- Department of Radiology, Texas Children's Hospital, Houston, Texas, USA.,Baylor College of Medicine, Houston, Texas, USA
| | - Ionela Iacobas
- Vascular Anomalies Center, Texas Children's Hospital, Houston, Texas, USA.,Vascular Anomalies Program, Cancer and Hematology Centers, Houston, Texas, USA.,Department of Pediatrics, Texas Children's Hospital, Houston, Texas, USA.,Section of Hematology/Oncology, Baylor College of Medicine, Houston, Texas, USA
| | - Stanley G Rockson
- Allan and Tina Neill Professor of Lymphatic Research and Medicine, Stanford University School of Medicine, Stanford, California, USA.,Center for Lymphatic and Venous Disorders, Stanford University School of Medicine, Stanford, California, USA.,Falk Cardiovascular Research Center, Stanford, California, USA
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45
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Rezzola S, Sigmund EC, Halin C, Ronca R. The lymphatic vasculature: An active and dynamic player in cancer progression. Med Res Rev 2021; 42:576-614. [PMID: 34486138 PMCID: PMC9291933 DOI: 10.1002/med.21855] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 04/29/2021] [Accepted: 08/26/2021] [Indexed: 12/16/2022]
Abstract
The lymphatic vasculature has been widely described and explored for its key functions in fluid homeostasis and in the organization and modulation of the immune response. Besides transporting immune cells, lymphatic vessels play relevant roles in tumor growth and tumor cell dissemination. Cancer cells that have invaded into afferent lymphatics are propagated to tumor‐draining lymph nodes (LNs), which represent an important hub for metastatic cell arrest and growth, immune modulation, and secondary dissemination to distant sites. In recent years many studies have reported new mechanisms by which the lymphatic vasculature affects cancer progression, ranging from induction of lymphangiogenesis to metastatic niche preconditioning or immune modulation. In this review, we provide an up‐to‐date description of lymphatic organization and function in peripheral tissues and in LNs and the changes induced to this system by tumor growth and progression. We will specifically focus on the reported interactions that occur between tumor cells and lymphatic endothelial cells (LECs), as well as on interactions between immune cells and LECs, both in the tumor microenvironment and in tumor‐draining LNs. Moreover, the most recent prognostic and therapeutic implications of lymphatics in cancer will be reported and discussed in light of the new immune‐modulatory roles that have been ascribed to LECs.
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Affiliation(s)
- Sara Rezzola
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Elena C Sigmund
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Cornelia Halin
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Roberto Ronca
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
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46
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Ducoli L, Detmar M. Beyond PROX1: transcriptional, epigenetic, and noncoding RNA regulation of lymphatic identity and function. Dev Cell 2021; 56:406-426. [PMID: 33621491 DOI: 10.1016/j.devcel.2021.01.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 12/08/2020] [Accepted: 01/25/2021] [Indexed: 12/11/2022]
Abstract
The lymphatic vascular system acts as the major transportation highway of tissue fluids, and its activation or impairment is associated with a wide range of diseases. There has been increasing interest in understanding the mechanisms that control lymphatic vessel formation (lymphangiogenesis) and function in development and disease. Here, we discuss recent insights into new players whose identification has contributed to deciphering the lymphatic regulatory code. We reveal how lymphatic endothelial cells, the building blocks of lymphatic vessels, utilize their transcriptional, post-transcriptional, and epigenetic portfolio to commit to and maintain their vascular lineage identity and function, with a particular focus on development.
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Affiliation(s)
- Luca Ducoli
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland; Molecular Life Sciences PhD Program, Swiss Federal Institute of Technology and University of Zürich, Zurich, Switzerland
| | - Michael Detmar
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology (ETH) Zurich, 8093 Zurich, Switzerland.
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47
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Ortsäter H, Hernández-Vásquez MN, Ulvmar MH, Gow A, Mäkinen T. An inducible Cldn11-CreER T2 mouse line for selective targeting of lymphatic valves. Genesis 2021; 59:e23439. [PMID: 34338433 DOI: 10.1002/dvg.23439] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/10/2021] [Accepted: 07/14/2021] [Indexed: 11/07/2022]
Abstract
Luminal valves of collecting lymphatic vessels are critical for maintaining unidirectional flow of lymph and their dysfunction underlies several forms of primary lymphedema. Here, we report on the generation of a transgenic mouse expressing the tamoxifen inducible CreERT2 under the control of Cldn11 promoter that allows, for the first time, selective and temporally controlled targeting of lymphatic valve endothelial cells. We show that within the vasculature CLDN11 is specifically expressed in lymphatic valves but is not required for their development as mice with a global loss of Cldn11 display normal valves in the mesentery. Tamoxifen treated Cldn11-CreERT2 mice also carrying a fluorescent Cre-reporter displayed reporter protein expression selectively in lymphatic valves and, to a lower degree, in venous valves. Analysis of developing vasculature further showed that Cldn11-CreERT2 -mediated recombination is induced during valve leaflet formation, and efficient labeling of valve endothelial cells was observed in mature valves. The Cldn11-CreERT2 mouse thus provides a valuable tool for functional studies of valves.
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Affiliation(s)
- Henrik Ortsäter
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | | | - Maria H Ulvmar
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Alexander Gow
- Department of Neurology and Pediatrics, Center for Molecular Medicine and Genetics, Wayne State University, Detroit, Michigan, USA
| | - Taija Mäkinen
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
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48
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Geng X, Ho YC, Srinivasan RS. Biochemical and mechanical signals in the lymphatic vasculature. Cell Mol Life Sci 2021; 78:5903-5923. [PMID: 34240226 PMCID: PMC11072415 DOI: 10.1007/s00018-021-03886-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 06/15/2021] [Accepted: 06/18/2021] [Indexed: 12/15/2022]
Abstract
Lymphatic vasculature is an integral part of the cardiovascular system where it maintains interstitial fluid balance. Additionally, lymphatic vasculature regulates lipid assimilation and inflammatory response. Lymphatic vasculature is composed of lymphatic capillaries, collecting lymphatic vessels and valves that function in synergy to absorb and transport fluid against gravitational and pressure gradients. Defects in lymphatic vessels or valves leads to fluid accumulation in tissues (lymphedema), chylous ascites, chylothorax, metabolic disorders and inflammation. The past three decades of research has identified numerous molecules that are necessary for the stepwise development of lymphatic vasculature. However, approaches to treat lymphatic disorders are still limited to massages and compression bandages. Hence, better understanding of the mechanisms that regulate lymphatic vascular development and function is urgently needed to develop efficient therapies. Recent research has linked mechanical signals such as shear stress and matrix stiffness with biochemical pathways that regulate lymphatic vessel growth, patterning and maturation and valve formation. The goal of this review article is to highlight these innovative developments and speculate on unanswered questions.
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Affiliation(s)
- Xin Geng
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73013, USA
| | - Yen-Chun Ho
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73013, USA
| | - R Sathish Srinivasan
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, 73013, USA.
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73117, USA.
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49
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Scallan JP, Knauer LA, Hou H, Castorena-Gonzalez JA, Davis MJ, Yang Y. Foxo1 deletion promotes the growth of new lymphatic valves. J Clin Invest 2021; 131:e142341. [PMID: 34263740 DOI: 10.1172/jci142341] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 06/03/2021] [Indexed: 11/17/2022] Open
Abstract
Patients with congenital lymphedema suffer from tissue swelling in part due to mutations in genes regulating lymphatic valve development. Lymphatic valve leaflets grow and are maintained throughout life in response to oscillatory shear stress (OSS), which regulates gene transcription in lymphatic endothelial cells (LECs). Here, we identified the first transcription factor, Foxo1, that repressed lymphatic valve formation by inhibiting the expression of valve-forming genes. We showed that both embryonic and postnatal ablation of Foxo1 in LECs induced additional valve formation in postnatal and adult mice in multiple tissues. Our quantitative analyses revealed that after deletion, the total number of valves in the mesentery was significantly (P < 0.01) increased in the Foxo1LEC-KO mice compared with Foxo1fl/fl controls. In addition, our quantitative real-time PCR (RT-PCR) data from cultured LECs showed that many valve-forming genes were significantly (P < 0.01) upregulated upon knockdown of FOXO1. To confirm our findings in vivo, rescue experiments showed that Foxc2+/- mice, a model of lymphedema-distichiasis, had 50% fewer lymphatic valves and that the remaining valves exhibited backleak. Both valve number and function were completely restored to control levels upon Foxo1 deletion. These findings established FOXO1 as a clinically relevant target to stimulate de novo lymphatic valve formation and rescue defective valves in congenital lymphedema.
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Affiliation(s)
- Joshua P Scallan
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Luz A Knauer
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | - Huayan Hou
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
| | | | - Michael J Davis
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri, USA
| | - Ying Yang
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA
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50
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González-Loyola A, Bovay E, Kim J, Lozano TW, Sabine A, Renevey F, Arroz-Madeira S, Rapin A, Wypych TP, Rota G, Durot S, Velin D, Marsland B, Guarda G, Delorenzi M, Zamboni N, Luther SA, Petrova TV. FOXC2 controls adult lymphatic endothelial specialization, function, and gut lymphatic barrier preventing multiorgan failure. SCIENCE ADVANCES 2021; 7:7/29/eabf4335. [PMID: 34272244 PMCID: PMC8284898 DOI: 10.1126/sciadv.abf4335] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 06/01/2021] [Indexed: 05/02/2023]
Abstract
The mechanisms maintaining adult lymphatic vascular specialization throughout life and their role in coordinating inter-organ communication to sustain homeostasis remain elusive. We report that inactivation of the mechanosensitive transcription factor Foxc2 in adult lymphatic endothelium leads to a stepwise intestine-to-lung systemic failure. Foxc2 loss compromised the gut epithelial barrier, promoted dysbiosis and bacterial translocation to peripheral lymph nodes, and increased circulating levels of purine metabolites and angiopoietin-2. Commensal microbiota depletion dampened systemic pro-inflammatory cytokine levels, corrected intestinal lymphatic dysfunction, and improved survival. Foxc2 loss skewed the specialization of lymphatic endothelial subsets, leading to populations with mixed, pro-fibrotic identities and to emergence of lymph node-like endothelial cells. Our study uncovers a cross-talk between lymphatic vascular function and commensal microbiota, provides single-cell atlas of lymphatic endothelial subtypes, and reveals organ-specific and systemic effects of dysfunctional lymphatics. These effects potentially contribute to the pathogenesis of diseases, such as inflammatory bowel disease, cancer, or lymphedema.
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Affiliation(s)
- Alejandra González-Loyola
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland
| | - Esther Bovay
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland
| | - Jaeryung Kim
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland
| | - Tania Wyss Lozano
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland
- SIB Swiss Institute of Bioinformatics, Lausanne 1015, Switzerland
| | - Amélie Sabine
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland
| | - Francois Renevey
- Department of Biochemistry, University of Lausanne, Epalinges 1066, Switzerland
| | - Silvia Arroz-Madeira
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland
| | - Alexis Rapin
- École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
| | - Tomasz P Wypych
- Department of Immunology and Pathology, Monash University, Melbourne 3800, Australia
| | - Giorgia Rota
- Department of Biochemistry, University of Lausanne, Epalinges 1066, Switzerland
| | - Stephan Durot
- Institute of Molecular Systems Biology ETH, Zurich 8093, Switzerland
| | - Dominique Velin
- Service of Gastroenterology and Hepatology, Department of Medicine, Centre Hospitalier Universitaire Vaudois, Lausanne 1011, Switzerland
| | - Benjamin Marsland
- Department of Immunology and Pathology, Monash University, Melbourne 3800, Australia
| | - Greta Guarda
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera italiana (USI), Bellinzona, Switzerland
| | - Mauro Delorenzi
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland
- SIB Swiss Institute of Bioinformatics, Lausanne 1015, Switzerland
| | - Nicola Zamboni
- Institute of Molecular Systems Biology ETH, Zurich 8093, Switzerland
| | - Sanjiv A Luther
- Department of Biochemistry, University of Lausanne, Epalinges 1066, Switzerland
| | - Tatiana V Petrova
- Department of Oncology, University of Lausanne and Ludwig Institute for Cancer Research Lausanne, Epalinges 1066, Switzerland.
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