1
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Ehrlich A, Pelli G, Pick R, Clochard L, Molica F, Kwak BR. Pannexin1 deletion in lymphatic endothelium affects lymphatic function in a sex-dependent manner. Physiol Rep 2024; 12:e16170. [PMID: 39085909 PMCID: PMC11291012 DOI: 10.14814/phy2.16170] [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: 01/24/2024] [Revised: 07/23/2024] [Accepted: 07/23/2024] [Indexed: 08/02/2024] Open
Abstract
The lymphatic network of capillaries and collecting vessels ensures tissue fluid homeostasis, absorption of dietary fats and trafficking of immune cells. Pannexin1 (Panx1) channels allow for the passage of ions and small metabolites between the cytosol and extracellular environment. Panx1 channels regulate the pathophysiological function of several tissues in a sex-dependent manner. Here, we studied the role of Panx1 in lymphatic function, and potential sex-dependent differences therein, in Prox1-CreERT2Panx1fl/fl and Panx1fl/fl control mice. Panx1 expression was higher in lymphatic endothelial cells (LECs) of male mice. Lymphatic vessel morphology was not affected in Prox1-CreERT2Panx1fl/fl male and female mice. Lymphatic drainage was decreased by 25% in male Prox1-CreERT2Panx1fl/fl mice, but was similar in females of both genotypes. Accordingly, only male Prox1-CreERT2Panx1fl/fl mice exhibited tail swelling, pointing to interstitial fluid accumulation in males upon Panx1 deletion in LECs. Moreover, serum triglyceride and free fatty acid levels raised less in Prox1-CreERT2Panx1fl/fl mice of both sexes in an oral lipid tolerance test. Finally, the percentage of migratory dendritic cells arriving in draining lymph nodes was increased in Prox1-CreERT2Panx1fl/fl female mice, but was comparable between male mice of both genotypes. Our results point to a LEC-specific role for Panx1 in the functions of the lymphatic system.
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Affiliation(s)
- Avigail Ehrlich
- Department of Pathology and Immunology (PATIM)University of GenevaGenevaSwitzerland
- Geneva Center for Inflammation Research (GCIR), Faculty of MedicineUniversity of GenevaGenevaSwitzerland
| | - Graziano Pelli
- Department of Pathology and Immunology (PATIM)University of GenevaGenevaSwitzerland
- Geneva Center for Inflammation Research (GCIR), Faculty of MedicineUniversity of GenevaGenevaSwitzerland
| | - Robert Pick
- Department of Pathology and Immunology (PATIM)University of GenevaGenevaSwitzerland
- Geneva Center for Inflammation Research (GCIR), Faculty of MedicineUniversity of GenevaGenevaSwitzerland
| | - Linda Clochard
- Department of Pathology and Immunology (PATIM)University of GenevaGenevaSwitzerland
- Geneva Center for Inflammation Research (GCIR), Faculty of MedicineUniversity of GenevaGenevaSwitzerland
| | - Filippo Molica
- Department of Pathology and Immunology (PATIM)University of GenevaGenevaSwitzerland
- Geneva Center for Inflammation Research (GCIR), Faculty of MedicineUniversity of GenevaGenevaSwitzerland
| | - Brenda R. Kwak
- Department of Pathology and Immunology (PATIM)University of GenevaGenevaSwitzerland
- Geneva Center for Inflammation Research (GCIR), Faculty of MedicineUniversity of GenevaGenevaSwitzerland
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2
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Jackson DG. Lymphatic trafficking of immune cells and insights for cancer metastasis. Clin Exp Metastasis 2024; 41:381-386. [PMID: 37606814 DOI: 10.1007/s10585-023-10229-3] [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: 05/15/2023] [Accepted: 07/28/2023] [Indexed: 08/23/2023]
Abstract
Most cancers and in particular carcinomas metastasise via the lymphatics to draining lymph nodes from where they can potentially achieve systemic dissemination by invasion of high endothelial blood venules (HEVs) in the paracortex [1, 2]. Currently however, the mechanisms by which tumours invade and migrate within the lymphatics are incompletely understood, although it seems likely they exploit at least some of the normal physiological mechanisms used by immune cells to access lymphatic capillaries and traffic to draining lymph nodes in the course of immune surveillance, immune modulation and the resolution of inflammation [3, 4]. Typically these include directional guidance via chemotaxis, haptotaxis and durotaxis, adhesion to the vessel surface via receptors including integrins, and junctional re-modelling by MMPs (Matrix MetalloProteinases) and ADAMs (A Disintegrin And Metalloproteinases) [5-7]. This short review focusses on a newly emerging mechanism for lymphatic entry that involves the large polysaccharide hyaluronan (HA) and its key lymphatic and immune cell receptors respectively LYVE-1 (Lymphatic Vessel Endothelial receptor) and CD44, and outlines recent work which indicates this axis may also be used by some tumours to aid nodal metastasis.
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Affiliation(s)
- David G Jackson
- Radcliffe Department of Medicine, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, OX3 9DS, UK.
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3
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Liaqat I, Hilska I, Saario M, Jakobsson E, Crivaro M, Peränen J, Vaahtomeri K. Spatially targeted chemokine exocytosis guides transmigration at lymphatic endothelial multicellular junctions. EMBO J 2024; 43:3141-3174. [PMID: 38877304 PMCID: PMC11294460 DOI: 10.1038/s44318-024-00129-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: 07/26/2023] [Revised: 04/24/2024] [Accepted: 04/29/2024] [Indexed: 06/16/2024] Open
Abstract
Migrating cells preferentially breach and integrate epithelial and endothelial monolayers at multicellular vertices. These sites are amenable to forces produced by the migrating cell and subsequent opening of the junctions. However, the cues that guide migrating cells to these entry portals, and eventually drive the transmigration process, are poorly understood. Here, we show that lymphatic endothelium multicellular junctions are the preferred sites of dendritic cell transmigration in both primary cell co-cultures and in mouse dermal explants. Dendritic cell guidance to multicellular junctions was dependent on the dendritic cell receptor CCR7, whose ligand, lymphatic endothelial chemokine CCL21, was exocytosed at multicellular junctions. Characterization of lymphatic endothelial secretory routes indicated Golgi-derived RAB6+ vesicles and RAB3+/27+ dense core secretory granules as intracellular CCL21 storage vesicles. Of these, RAB6+ vesicles trafficked CCL21 to the multicellular junctions, which were enriched with RAB6 docking factor ELKS (ERC1). Importantly, inhibition of RAB6 vesicle exocytosis attenuated dendritic cell transmigration. These data exemplify how spatially-restricted exocytosis of guidance cues helps to determine where dendritic cells transmigrate.
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Affiliation(s)
- Inam Liaqat
- Translational Cancer Medicine Research Program, University of Helsinki, Biomedicum Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
| | - Ida Hilska
- Translational Cancer Medicine Research Program, University of Helsinki, Biomedicum Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
| | - Maria Saario
- Translational Cancer Medicine Research Program, University of Helsinki, Biomedicum Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
| | - Emma Jakobsson
- Translational Cancer Medicine Research Program, University of Helsinki, Biomedicum Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland
| | - Marko Crivaro
- Light Microscopy Unit, Institute of Biotechnology, HiLIFE, University of Helsinki, FI-00014, Helsinki, Finland
| | - Johan Peränen
- Institute of Biotechnology, HiLIFE, University of Helsinki, FI-00014, Helsinki, Finland
| | - Kari Vaahtomeri
- Translational Cancer Medicine Research Program, University of Helsinki, Biomedicum Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland.
- Wihuri Research Institute, Biomedicum Helsinki, Haartmaninkatu 8, 00290, Helsinki, Finland.
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4
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Zhao L, Qiu Z, Yang Z, Xu L, Pearce TM, Wu Q, Yang K, Li F, Saulnier O, Fei F, Yu H, Gimple RC, Varadharajan V, Liu J, Hendrikse LD, Fong V, Wang W, Zhang J, Lv D, Lee D, Lehrich BM, Jin C, Ouyang L, Dixit D, Wu H, Wang X, Sloan AE, Wang X, Huan T, Mark Brown J, Goldman SA, Taylor MD, Zhou S, Rich JN. Lymphatic endothelial-like cells promote glioblastoma stem cell growth through cytokine-driven cholesterol metabolism. NATURE CANCER 2024; 5:147-166. [PMID: 38172338 DOI: 10.1038/s43018-023-00658-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/26/2023] [Indexed: 01/05/2024]
Abstract
Glioblastoma is the most lethal primary brain tumor with glioblastoma stem cells (GSCs) atop a cellular hierarchy. GSCs often reside in a perivascular niche, where they receive maintenance cues from endothelial cells, but the role of heterogeneous endothelial cell populations remains unresolved. Here, we show that lymphatic endothelial-like cells (LECs), while previously unrecognized in brain parenchyma, are present in glioblastomas and promote growth of CCR7-positive GSCs through CCL21 secretion. Disruption of CCL21-CCR7 paracrine communication between LECs and GSCs inhibited GSC proliferation and growth. LEC-derived CCL21 induced KAT5-mediated acetylation of HMGCS1 on K273 in GSCs to enhance HMGCS1 protein stability. HMGCS1 promoted cholesterol synthesis in GSCs, favorable for tumor growth. Expression of the CCL21-CCR7 axis correlated with KAT5 expression and HMGCS1K273 acetylation in glioblastoma specimens, informing patient outcome. Collectively, glioblastomas contain previously unrecognized LECs that promote the molecular crosstalk between endothelial and tumor cells, offering potentially alternative therapeutic strategies.
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Affiliation(s)
- Linjie Zhao
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA, USA
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Zhixin Qiu
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Anesthesiology, Zhongshan Hospital, Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Zhengnan Yang
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children of the Ministry of Education, and State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, and Collaborative Innovation Center, Chengdu, China
| | - Lian Xu
- Department of Pathology, West China Second Hospital, Sichuan University, Chengdu, China
| | - Thomas M Pearce
- Department of Pathology, Division of Neuropathology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Qiulian Wu
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA, USA
| | - Kailin Yang
- Department of Radiation Oncology, Taussig Cancer Center, Cleveland Clinic, Cleveland, OH, USA
| | - FuLong Li
- Department of Pharmacology and Moores Cancer Center, University of California, San Diego, La Jolla, CA, USA
| | - Olivier Saulnier
- The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Developmental & Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Fan Fei
- Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu, China
| | - Huaxu Yu
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ryan C Gimple
- Department of Pathology, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Venkateshwari Varadharajan
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Juxiu Liu
- Division of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
| | - Liam D Hendrikse
- The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Developmental & Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Vernon Fong
- The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Developmental & Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - Wei Wang
- Department of Gynecology, Huzhou Maternity & Child Health Care Hospital, Huzhou, China
| | - Jiao Zhang
- The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Developmental & Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Deguan Lv
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA, USA
| | - Derrick Lee
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA, USA
| | - Brandon M Lehrich
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA, USA
| | - Chunyu Jin
- Howard Hughes Medical Institute, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Liang Ouyang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu, China
| | - Deobrat Dixit
- Division of Regenerative Medicine, Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Haoxing Wu
- Huaxi MR Research Center, Department of Radiology, Functional and Molecular Imaging Key Laboratory of Sichuan Province, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
| | - Xiang Wang
- Division of Obstetrics, Key Laboratory of Birth Defects and Related Disease of Women and Children of MOE, State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, Chengdu, China
| | - Andrew E Sloan
- Department of Neurosurgery, Case Western Reserve University, Cleveland, OH, USA
| | - Xiuxing Wang
- School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Tao Huan
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - J Mark Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Steven A Goldman
- University of Rochester Medical Center, Rochester, NY, USA
- University of Copenhagen, Copenhagen, Denmark
| | - Michael D Taylor
- The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Developmental & Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada
- Division of Neurosurgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Shengtao Zhou
- Department of Obstetrics and Gynecology, Key Laboratory of Birth Defects and Related Diseases of Women and Children of the Ministry of Education, and State Key Laboratory of Biotherapy, West China Second Hospital, Sichuan University, and Collaborative Innovation Center, Chengdu, China.
| | - Jeremy N Rich
- University of Pittsburgh Medical Center, Hillman Cancer Center, Pittsburgh, PA, USA.
- Department of Neurology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
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5
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Jiang Z, Waterbury QT, Malagola E, Fu N, Kim W, Ochiai Y, Wu F, Guha C, Shawber CJ, Yan KS, Wang TC. Microbial-Dependent Recruitment of Immature Myeloid Cells Promotes Intestinal Regeneration. Cell Mol Gastroenterol Hepatol 2023; 17:321-346. [PMID: 37898454 PMCID: PMC10821484 DOI: 10.1016/j.jcmgh.2023.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/18/2023] [Accepted: 10/18/2023] [Indexed: 10/30/2023]
Abstract
BACKGROUND & AIMS The intestinal epithelium functions both in nutrient absorption and as a barrier, separating the luminal contents from a network of vascular, fibroblastic, and immune cells underneath. After injury to the intestine, multiple cell populations cooperate to drive regeneration of the mucosal barrier, including lymphatic endothelial cells (LECs). A population of granulocytic immature myeloid cells (IMCs), marked by Hdc, participate in regeneration of multiple organs such as the colon and central nervous system, and their contribution to intestinal regeneration was investigated. METHODS By using male and female histidine decarboxylase (Hdc) green fluorescent reporter (GFP) mice, we investigated the role of Hdc+ IMCs in intestinal regeneration after exposure to 12 Gy whole-body irradiation. The movement of IMCs was analyzed using flow cytometry and immunostaining. Ablation of Hdc+ cells using the HdcCreERT2 tamoxifen-inducible recombinase Cre system, conditional knockout of Prostaglandin-endoperoxidase synthase 2 (Ptgs2) in Hdc+ cells using HdcCre; Ptgs2 floxed mice, and visualization of LECs using Prox1tdTomato mice also was performed. The role of microbial signals was investigated by knocking down mice gut microbiomes using antibiotic cocktail gavages. RESULTS We found that Hdc+ IMCs infiltrate the injured intestine after irradiation injury and promote epithelial regeneration in part by modulating LEC activity. Hdc+ IMCs express Ptgs2 (encoding cyclooxygenase-2/COX-2), and enables them to produce prostaglandin E2. Prostaglandin E2 acts on the prostaglandin E2 receptor 4 receptor (EP4) on LECs to promote lymphangiogenesis and induce the expression of proregenerative factors including R-spondin 3. Depletion of gut microbes leads to reduced intestinal regeneration by impaired recruitment of IMCs. CONCLUSIONS Altogether, our results unveil a critical role for IMCs in intestinal repair by modulating LEC activity and implicate gut microbes as mediators of intestinal regeneration.
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Affiliation(s)
- Zhengyu Jiang
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Quin T Waterbury
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York; Institute of Human Nutrition, Columbia University Medical Center, New York, New York
| | - Ermanno Malagola
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Na Fu
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York; Department of Traditional and Western Medical Hepatology, Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Woosook Kim
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Yosuke Ochiai
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York
| | - Feijing Wu
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York; Department of Thyroid and Breast Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, Fujian, China
| | - Chandan Guha
- Department of Radiation Oncology, Montefiore Medical Center, Bronx, New York; Department of Pathology, Albert Einstein College of Medicine, Bronx, New York
| | - Carrie J Shawber
- Department of Obstetrics and Gynecology, Columbia University Irving Medical Center, New York, New York
| | - Kelley S Yan
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Columbia Center for Human Development, Columbia University, New York, NY, USA; Department of Genetics and Development, Columbia University Medical Center, New York, New York
| | - Timothy C Wang
- Division of Digestive and Liver Diseases Medicine, Irving Cancer Research Center, Department of Medicine, Columbia University Medical Center, New York, New York; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York.
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6
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Li J, Zhou J, Huang H, Jiang J, Zhang T, Ni C. Mature dendritic cells enriched in immunoregulatory molecules (mregDCs): A novel population in the tumour microenvironment and immunotherapy target. Clin Transl Med 2023; 13:e1199. [PMID: 36808888 PMCID: PMC9937888 DOI: 10.1002/ctm2.1199] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/21/2023] [Accepted: 01/30/2023] [Indexed: 02/19/2023] Open
Abstract
BACKGROUND Dendritic cells (DCs) mediate divergent immune effects by activating T cells or negatively regulating the immune response to promote immune tolerance. They perform specific functions determined by their tissue distribution and maturation state. Traditionally, immature and semimature DCs were described to have immunosuppressive effects, leading to immune tolerance. Nonetheless, recent research has demonstrated that mature DCs can also suppress the immune response under certain circumstances. MAIN BODY Mature DCs enriched in immunoregulatory molecules (mregDCs) have emerged as a regulatory module across species and tumour types. Indeed, the distinct roles of mregDCs in tumour immunotherapy have sparked the interest of researchers in the field of single-cell omics. In particular, these regulatory cells were found to be associated with a positive response to immunotherapy and a favourable prognosis. CONCLUSION Here, we provide a general overview of the latest and most notable advances and recent findings regarding the basic features and complex roles of mregDCs in nonmalignant diseases and the tumour microenvironment. We also emphasise the important clinical implications of mregDCs in tumours.
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Affiliation(s)
- Jiaxin Li
- Department of Breast SurgerySecond Affiliated HospitalZhejiang UniversityHangzhouZhejiangChina
- Key Laboratory of Tumor Microenvironment and Immune Therapy of Zhejiang ProvinceSecond Affiliated Hospital, Zhejiang UniversityHangzhouZhejiangChina
- Cancer CenterZhejiang UniversityHangzhouZhejiangChina
| | - Jun Zhou
- Cancer CenterZhejiang UniversityHangzhouZhejiangChina
- Department of Breast SurgeryAffiliated Hangzhou First People's Hospital, Zhejiang UniversityHangzhouZhejiangChina
| | - Huanhuan Huang
- Department of Breast SurgerySecond Affiliated HospitalZhejiang UniversityHangzhouZhejiangChina
- Key Laboratory of Tumor Microenvironment and Immune Therapy of Zhejiang ProvinceSecond Affiliated Hospital, Zhejiang UniversityHangzhouZhejiangChina
- Cancer CenterZhejiang UniversityHangzhouZhejiangChina
| | - Jiahuan Jiang
- Department of Breast SurgerySecond Affiliated HospitalZhejiang UniversityHangzhouZhejiangChina
- Key Laboratory of Tumor Microenvironment and Immune Therapy of Zhejiang ProvinceSecond Affiliated Hospital, Zhejiang UniversityHangzhouZhejiangChina
- Cancer CenterZhejiang UniversityHangzhouZhejiangChina
| | - Ting Zhang
- Cancer CenterZhejiang UniversityHangzhouZhejiangChina
- Department of RadiotherapySecond Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina
| | - Chao Ni
- Department of Breast SurgerySecond Affiliated HospitalZhejiang UniversityHangzhouZhejiangChina
- Key Laboratory of Tumor Microenvironment and Immune Therapy of Zhejiang ProvinceSecond Affiliated Hospital, Zhejiang UniversityHangzhouZhejiangChina
- Cancer CenterZhejiang UniversityHangzhouZhejiangChina
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7
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Liu P, Kang C, Zhang J, Liu Y, Liu J, Hu T, Zeng X, Qiu S. The role of dendritic cells in allergic diseases. Int Immunopharmacol 2022; 113:109449. [DOI: 10.1016/j.intimp.2022.109449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 11/18/2022]
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8
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Lovatt D, Tamburino A, Krasowska-Zoladek A, Sanoja R, Li L, Peterson V, Wang X, Uslaner J. scRNA-seq generates a molecular map of emerging cell subtypes after sciatic nerve injury in rats. Commun Biol 2022; 5:1105. [PMID: 36261573 PMCID: PMC9581950 DOI: 10.1038/s42003-022-03970-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 09/09/2022] [Indexed: 01/10/2023] Open
Abstract
Patients with peripheral nerve injury, viral infection or metabolic disorder often suffer neuropathic pain due to inadequate pharmacological options for relief. Developing novel therapies has been challenged by incomplete mechanistic understanding of the cellular microenvironment in sensory nerve that trigger the emergence and persistence of pain. In this study, we report a high resolution transcriptomics map of the cellular heterogeneity of naïve and injured rat sensory nerve covering more than 110,000 individual cells. Annotation reveals distinguishing molecular features of multiple major cell types totaling 45 different subtypes in naïve nerve and an additional 23 subtypes emerging after injury. Ligand-receptor analysis revealed a myriad of potential targets for pharmacological intervention. This work forms a comprehensive resource and unprecedented window into the cellular milieu underlying neuropathic pain and demonstrates that nerve injury is a dynamic process orchestrated by multiple cell types in both the endoneurial and epineurial nerve compartments.
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Affiliation(s)
- Ditte Lovatt
- Department of Neuroscience, Merck & Co., Inc, West Point, PA, USA.
| | - Alex Tamburino
- Department of Data and Genome Sciences, Merck & Co., Inc, West Point, PA, USA
| | | | - Raul Sanoja
- Department of Neuroscience, Merck & Co., Inc, West Point, PA, USA.,Biomarkers & Imaging, Vertex Pharmaceuticals, Boston, USA
| | - Lixia Li
- Department of Genome and Biomarker Science, Merck & Co., Inc, Boston, MA, USA
| | - Vanessa Peterson
- Department of Genome and Biomarker Science, Merck & Co., Inc, Boston, MA, USA
| | - Xiaohai Wang
- Department of Neuroscience, Merck & Co., Inc, West Point, PA, USA
| | - Jason Uslaner
- Department of Neuroscience, Merck & Co., Inc, West Point, PA, USA
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9
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Delgado M, Lennon-Duménil AM. How cell migration helps immune sentinels. Front Cell Dev Biol 2022; 10:932472. [PMID: 36268510 PMCID: PMC9577558 DOI: 10.3389/fcell.2022.932472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 09/13/2022] [Indexed: 12/01/2022] Open
Abstract
The immune system relies on the migratory capacity of its cellular components, which must be mobile in order to defend the host from invading micro-organisms or malignant cells. This applies in particular to immune sentinels from the myeloid lineage, i.e. macrophages and dendritic cells. Cell migration is already at work during mammalian early development, when myeloid cell precursors migrate from the yolk sac, an extra embryonic structure, to colonize tissues and form the pool of tissue-resident macrophages. Later, this is accompanied by a migration wave of precursors and monocytes from the bone marrow to secondary lymphoid organs and the peripheral tissues. They differentiate into DCs and monocyte-derived macrophages. During adult life, cell migration endows immune cells with the ability to patrol their environment as well as to circulate between peripheral tissues and lymphoid organs. Hence migration of immune cells is key to building an efficient defense system for an organism. In this review, we will describe how cell migratory capacity regulates the various stages in the life of myeloid cells from development to tissue patrolling, and migration to lymph nodes. We will focus on the role of the actin cytoskeletal machinery and its regulators, and how it contributes to the establishment and function of the immune system.
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10
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Quast T, Zölzer K, Guu D, Alvarez L, Küsters C, Kiermaier E, Kaupp UB, Kolanus W. A Stable Chemokine Gradient Controls Directional Persistence of Migrating Dendritic Cells. Front Cell Dev Biol 2022; 10:943041. [PMID: 36016652 PMCID: PMC9395945 DOI: 10.3389/fcell.2022.943041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/21/2022] [Indexed: 11/13/2022] Open
Abstract
Navigation of dendritic cells (DCs) from the site of infection to lymphoid organs is guided by concentration gradients of CCR7 ligands. How cells interpret chemokine gradients and how they couple directional sensing to polarization and persistent chemotaxis has remained largely elusive. Previous experimental systems were limited in the ability to control fast de novo formation of the final gradient slope, long-lasting stability of the gradient and to expose cells to dynamic stimulation. Here, we used a combination of microfluidics and quantitative in vitro live cell imaging to elucidate the chemotactic sensing strategy of DCs. The microfluidic approach allows us to generate soluble gradients with high spatio-temporal precision and to analyze actin dynamics, cell polarization, and persistent directional migration in both static and dynamic environments. We demonstrate that directional persistence of DC migration requires steady-state characteristics of the soluble gradient instead of temporally rising CCL19 concentration, implying that spatial sensing mechanisms control chemotaxis of DCs. Kymograph analysis of actin dynamics revealed that the presence of the CCL19 gradient is essential to stabilize leading edge protrusions in DCs and to determine directionality, since both cytoskeletal polarization and persistent chemotaxis are abrogated in the range of seconds when steady-state gradients are perturbed. In contrast to Dictyostelium amoeba, DCs are unable to decode oscillatory stimulation of soluble chemokine traveling waves into a directional response toward the wave source. These findings are consistent with the notion that DCs do not employ adaptive temporal sensing strategies that discriminate temporally increasing and decreasing chemoattractant concentrations in our setting. Taken together, in our experimental system DCs do not depend on increasing absolute chemokine concentration over time to induce persistent migration and do not integrate oscillatory stimulation. The observed capability of DCs to migrate with high directional persistence in stable gradients but not when subjected to periodic temporal cues, identifies spatial sensing as a key requirement for persistent chemotaxis of DCs.
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Affiliation(s)
- Thomas Quast
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Karolin Zölzer
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Donald Guu
- Molecular Sensory Systems, Max Planck Institute for Neurobiology of Behavior—Caesar, Bonn, Germany
| | - Luis Alvarez
- Molecular Sensory Systems, Max Planck Institute for Neurobiology of Behavior—Caesar, Bonn, Germany
| | - Carsten Küsters
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Eva Kiermaier
- Immune and Tumor Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - U. Benjamin Kaupp
- Molecular Sensory Systems, Max Planck Institute for Neurobiology of Behavior—Caesar, Bonn, Germany
| | - Waldemar Kolanus
- Molecular Immunology and Cell Biology, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
- *Correspondence: Waldemar Kolanus,
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11
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Hypoxia orchestrates the lymphovascular–immune ensemble in cancer. Trends Cancer 2022; 8:771-784. [DOI: 10.1016/j.trecan.2022.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/31/2022] [Accepted: 04/25/2022] [Indexed: 11/18/2022]
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12
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Gupta YH, Khanom A, Acton SE. Control of Dendritic Cell Function Within the Tumour Microenvironment. Front Immunol 2022; 13:733800. [PMID: 35355992 PMCID: PMC8960065 DOI: 10.3389/fimmu.2022.733800] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 02/09/2022] [Indexed: 12/12/2022] Open
Abstract
The tumour microenvironment (TME) presents a major block to anti-tumour immune responses and to effective cancer immunotherapy. The inflammatory mediators such as cytokines, chemokines, growth factors and prostaglandins generated in the TME alter the phenotype and function of dendritic cells (DCs) that are critical for a successful adaptive immune response against the growing tumour. In this mini review we discuss how tumour cells and the surrounding stroma modulate DC maturation and trafficking to impact T cell function. Fibroblastic stroma and the associated extracellular matrix around tumours can also provide physical restrictions to infiltrating DCs and other leukocytes. We discuss interactions between the inflammatory TME and infiltrating immune cell function, exploring how the inflammatory TME affects generation of T cell-driven anti-tumour immunity. We discuss the open question of the relative importance of antigen-presentation site; locally within the TME versus tumour-draining lymph nodes. Addressing these questions will potentially increase immune surveillance and enhance anti-tumour immunity.
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Affiliation(s)
- Yukti Hari Gupta
- Stromal Immunology Laboratory, MRC Laboratory for Molecular Cell Biology, University College London, London, United Kingdom
| | | | - Sophie E. Acton
- Stromal Immunology Laboratory, MRC Laboratory for Molecular Cell Biology, University College London, London, United Kingdom
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13
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Peil J, Bock F, Kiefer F, Schmidt R, Heindl LM, Cursiefen C, Schlereth SL. New Therapeutic Approaches for Conjunctival Melanoma-What We Know So Far and Where Therapy Is Potentially Heading: Focus on Lymphatic Vessels and Dendritic Cells. Int J Mol Sci 2022; 23:1478. [PMID: 35163401 PMCID: PMC8835854 DOI: 10.3390/ijms23031478] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 11/25/2022] Open
Abstract
Conjunctival melanoma (CM) accounts for 5% of all ocular melanomas and arises from malignantly transformed melanocytes in the conjunctival epithelium. Current therapies using surgical excision in combination with chemo- or cryotherapy still have high rates for recurrences and metastatic disease. Lately, novel signal transduction-targeted and immune checkpoint inhibitors like cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) inhibitors, programmed cell death protein-1 (PD-1) receptor inhibitors, BRAF- or MEK-inhibitors for systemic treatment of melanoma have improved the outcome even for unresectable cutaneous melanoma, improving patient survival dramatically. The use of these therapies is now also recommended for CM; however, the immunological background of CM is barely known, underlining the need for research to better understand the immunological basics when treating CM patients with immunomodulatory therapies. Immune checkpoint inhibitors activate tumor defense by interrupting inhibitory interactions between tumor cells and T lymphocytes at the so-called checkpoints. The tumor cells exploit these inhibitory targets on T-cells that are usually used by dendritic cells (DCs). DCs are antigen-presenting cells at the forefront of immune response induction. They contribute to immune tolerance and immune defense but in the case of tumor development, immune tolerance is often prevalent. Enhancing the immune response via DCs, interfering with the lymphatic pathways during immune cell migration and tumor development and specifically targeting tumor cells is a major therapeutic opportunity for many tumor entities including CM. This review summarizes the current knowledge on the function of lymphatic vessels in tumor growth and immune cell transport and continues to compare DC subsets in CM with related melanomas, such as cutaneous melanoma and mucosal melanoma.
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Affiliation(s)
- Jennifer Peil
- Department of Ophthalmology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (J.P.); (F.B.); (L.M.H.); (C.C.)
| | - Felix Bock
- Department of Ophthalmology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (J.P.); (F.B.); (L.M.H.); (C.C.)
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50937 Cologne, Germany
| | - Friedemann Kiefer
- European Institute for Molecular Imaging (EIMI), University of Münster, 48149 Münster, Germany;
| | - Rebecca Schmidt
- Department of Oral, Maxillofacial and Plastic Facial Surgery, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, 40225 Düsseldorf, Germany;
| | - Ludwig M. Heindl
- Department of Ophthalmology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (J.P.); (F.B.); (L.M.H.); (C.C.)
| | - Claus Cursiefen
- Department of Ophthalmology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (J.P.); (F.B.); (L.M.H.); (C.C.)
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50937 Cologne, Germany
| | - Simona L. Schlereth
- Department of Ophthalmology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50937 Cologne, Germany; (J.P.); (F.B.); (L.M.H.); (C.C.)
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50937 Cologne, Germany
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14
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Lei K, Kurum A, Kaynak M, Bonati L, Han Y, Cencen V, Gao M, Xie YQ, Guo Y, Hannebelle MTM, Wu Y, Zhou G, Guo M, Fantner GE, Sakar MS, Tang L. Cancer-cell stiffening via cholesterol depletion enhances adoptive T-cell immunotherapy. Nat Biomed Eng 2021; 5:1411-1425. [PMID: 34873307 PMCID: PMC7612108 DOI: 10.1038/s41551-021-00826-6] [Citation(s) in RCA: 100] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 10/27/2021] [Indexed: 02/05/2023]
Abstract
Malignant transformation and tumour progression are associated with cancer-cell softening. Yet how the biomechanics of cancer cells affects T-cell-mediated cytotoxicity and thus the outcomes of adoptive T-cell immunotherapies is unknown. Here we show that T-cell-mediated cancer-cell killing is hampered for cortically soft cancer cells, which have plasma membranes enriched in cholesterol, and that cancer-cell stiffening via cholesterol depletion augments T-cell cytotoxicity and enhances the efficacy of adoptive T-cell therapy against solid tumours in mice. We also show that the enhanced cytotoxicity against stiffened cancer cells is mediated by augmented T-cell forces arising from an increased accumulation of filamentous actin at the immunological synapse, and that cancer-cell stiffening has negligible influence on: T-cell-receptor signalling, production of cytolytic proteins such as granzyme B, secretion of interferon gamma and tumour necrosis factor alpha, and Fas-receptor-Fas-ligand interactions. Our findings reveal a mechanical immune checkpoint that could be targeted therapeutically to improve the effectiveness of cancer immunotherapies.
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Affiliation(s)
- Kewen Lei
- Institute of Materials Science and Engineering, École polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Armand Kurum
- Institute of Materials Science and Engineering, École polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Murat Kaynak
- Institute of Mechanical Engineering, EPFL, Lausanne, Switzerland
| | - Lucia Bonati
- Institute of Bioengineering, EPFL, Lausanne, Switzerland
| | - Yulong Han
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - Min Gao
- Institute of Bioengineering, EPFL, Lausanne, Switzerland
| | - Yu-Qing Xie
- Institute of Bioengineering, EPFL, Lausanne, Switzerland
| | - Yugang Guo
- Institute of Bioengineering, EPFL, Lausanne, Switzerland
| | | | - Yangping Wu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Guanyu Zhou
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Ming Guo
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | - Mahmut Selman Sakar
- Institute of Mechanical Engineering, EPFL, Lausanne, Switzerland
- Institute of Bioengineering, EPFL, Lausanne, Switzerland
| | - Li Tang
- Institute of Materials Science and Engineering, École polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland.
- Institute of Bioengineering, EPFL, Lausanne, Switzerland.
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15
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Collado-Diaz V, Medina-Sanchez JD, Gkountidi AO, Halin C. Imaging leukocyte migration through afferent lymphatics. Immunol Rev 2021; 306:43-57. [PMID: 34708414 PMCID: PMC9298274 DOI: 10.1111/imr.13030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/11/2022]
Abstract
Afferent lymphatics mediate the transport of antigen and leukocytes, especially of dendritic cells (DCs) and T cells, from peripheral tissues to draining lymph nodes (dLNs). As such they play important roles in the induction and regulation of adaptive immunity. Over the past 15 years, great advances in our understanding of leukocyte trafficking through afferent lymphatics have been made through time‐lapse imaging studies performed in tissue explants and in vivo, allowing to visualize this process with cellular resolution. Intravital imaging has revealed that intralymphatic leukocytes continue to actively migrate once they have entered into lymphatic capillaries, as a consequence of the low flow conditions present in this compartment. In fact, leukocytes spend considerable time migrating, patrolling and interacting with the lymphatic endothelium or with other intralymphatic leukocytes within lymphatic capillaries. Cells typically only start to detach once they arrive in downstream‐located collecting vessels, where vessel contractions contribute to enhanced lymph flow. In this review, we will introduce the biology of afferent lymphatic vessels and report on the presumed significance of DC and T cell migration via this route. We will specifically highlight how time‐lapse imaging has contributed to the current model of lymphatic trafficking and the emerging notion that ‐ besides transport – lymphatic capillaries exert additional roles in immune modulation.
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Affiliation(s)
| | | | | | - Cornelia Halin
- Institute of Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
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16
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Ravaud C, Ved N, Jackson DG, Vieira JM, Riley PR. Lymphatic Clearance of Immune Cells in Cardiovascular Disease. Cells 2021; 10:cells10102594. [PMID: 34685572 PMCID: PMC8533855 DOI: 10.3390/cells10102594] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/26/2021] [Accepted: 09/27/2021] [Indexed: 12/11/2022] Open
Abstract
Recent advances in our understanding of the lymphatic system, its function, development, and role in pathophysiology have changed our views on its importance. Historically thought to be solely involved in the transport of tissue fluid, lipids, and immune cells, the lymphatic system displays great heterogeneity and plasticity and is actively involved in immune cell regulation. Interference in any of these processes can be deleterious, both at the developmental and adult level. Preclinical studies into the cardiac lymphatic system have shown that invoking lymphangiogenesis and enhancing immune cell trafficking in ischaemic hearts can reduce myocardial oedema, reduce inflammation, and improve cardiac outcome. Understanding how immune cells and the lymphatic endothelium interact is also vital to understanding how the lymphatic vascular network can be manipulated to improve immune cell clearance. In this Review, we examine the different types of immune cells involved in fibrotic repair following myocardial infarction. We also discuss the development and function of the cardiac lymphatic vasculature and how some immune cells interact with the lymphatic endothelium in the heart. Finally, we establish how promoting lymphangiogenesis is now a prime therapeutic target for reducing immune cell persistence, inflammation, and oedema to restore heart function in ischaemic heart disease.
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Affiliation(s)
- Christophe Ravaud
- Burdon-Sanderson Cardiac Science Centre, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK; (C.R.); (N.V.); (J.M.V.)
| | - Nikita Ved
- Burdon-Sanderson Cardiac Science Centre, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK; (C.R.); (N.V.); (J.M.V.)
| | - David G. Jackson
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DS, UK;
| | - Joaquim Miguel Vieira
- Burdon-Sanderson Cardiac Science Centre, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK; (C.R.); (N.V.); (J.M.V.)
| | - Paul R. Riley
- Burdon-Sanderson Cardiac Science Centre, Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK; (C.R.); (N.V.); (J.M.V.)
- Correspondence:
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17
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Leithner A, Altenburger LM, Hauschild R, Assen FP, Rottner K, Stradal TEB, Diz-Muñoz A, Stein JV, Sixt M. Dendritic cell actin dynamics control contact duration and priming efficiency at the immunological synapse. J Cell Biol 2021; 220:211749. [PMID: 33533935 PMCID: PMC7863705 DOI: 10.1083/jcb.202006081] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 11/25/2020] [Accepted: 01/12/2021] [Indexed: 01/22/2023] Open
Abstract
Dendritic cells (DCs) are crucial for the priming of naive T cells and the initiation of adaptive immunity. Priming is initiated at a heterologous cell–cell contact, the immunological synapse (IS). While it is established that F-actin dynamics regulates signaling at the T cell side of the contact, little is known about the cytoskeletal contribution on the DC side. Here, we show that the DC actin cytoskeleton is decisive for the formation of a multifocal synaptic structure, which correlates with T cell priming efficiency. DC actin at the IS appears in transient foci that are dynamized by the WAVE regulatory complex (WRC). The absence of the WRC in DCs leads to stabilized contacts with T cells, caused by an increase in ICAM1-integrin–mediated cell–cell adhesion. This results in lower numbers of activated and proliferating T cells, demonstrating an important role for DC actin in the regulation of immune synapse functionality.
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Affiliation(s)
- Alexander Leithner
- Institute of Science and Technology Austria, Klosterneuburg, Austria.,Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Lukas M Altenburger
- Department of Oncology, Microbiology and Immunology, University of Fribourg, Fribourg, Switzerland
| | - Robert Hauschild
- Institute of Science and Technology Austria, Klosterneuburg, Austria
| | - Frank P Assen
- Institute of Science and Technology Austria, Klosterneuburg, Austria
| | - Klemens Rottner
- Zoological Institute, Technical University Braunschweig, Braunschweig, Germany.,Department of Cell Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Theresia E B Stradal
- Department of Cell Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Alba Diz-Muñoz
- Cell Biology and Biophysics Units, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Jens V Stein
- Department of Oncology, Microbiology and Immunology, University of Fribourg, Fribourg, Switzerland
| | - Michael Sixt
- Institute of Science and Technology Austria, Klosterneuburg, Austria
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18
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Feng Y, Zhong X, Ni HF, Wang C, Tang TT, Wang LT, Song KY, Tang RN, Liu H, Liu BC, Lv LL. Urinary small extracellular vesicles derived CCL21 mRNA as biomarker linked with pathogenesis for diabetic nephropathy. J Transl Med 2021; 19:355. [PMID: 34404433 PMCID: PMC8371892 DOI: 10.1186/s12967-021-03030-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 08/07/2021] [Indexed: 01/06/2023] Open
Abstract
Background Diabetic nephropathy (DN) is a leading cause of renal failure, whereas the effective and early diagnostic biomarkers are still lacking. Methods Fourteen cytokines and chemokines mRNA were detected in urinary extracellular vesicles (EVs) from the screening cohort including 4 healthy controls (HC), 4 diabetes mellitus (DM) and 4 biopsy-proven DN patients, and was validated in another 16 HC and 15 DM and 28 DN patients. Correlation analysis was performed between the candidate biomarkers and clinic parameters as well as kidney histological changes. The findings were also confirmed in DN rat model with single injection of STZ. Results The number of small EVs secreted in urine was increased in DN patients compared to DM patients and healthy controls, with expression of AQP1 (a marker of proximal tubules) and AQP2 (a marker of distal/collecting tubules). Small EVs derived CCL21 mRNA increased significantly in DN patients and correlated with level of proteinuria and eGFR. Interestingly, elevated CCL21 mRNA from urine small EVs was observed in DN patients with normal renal function and could discriminate early DN patients from DM more efficiently compared to eGFR and proteinuria. CCL21 also showed an accurate diagnostic ability in distinguishing incipient from overt DN. Histologically, CCL21 mRNA expression increased progressively with the deterioration of tubulointerstitial inflammation and showed the highest level in nodular sclerosis group (class III) in DN patients. Remarkable infiltration of CD3 positive T cells including both CD4 and CD8 positive T cell population were observed in DN patients with high-CCL21 expression. Besides, accumulation of CD3 positive T cells correlated with level of urinary small EVs derived CCL21 and co-localized with CCL21 in the tubulointerstitium in DN patients. Finally, the correlation of CCL21 expression in renal cortex and urinary small EVs was confirmed in STZ-induced DN rat model. Conclusions Urinary small EVs derived CCL21 mRNA may serve as early biomarker for identifying DN linked with pathogenesis. CCL21 mRNA mediated T cell infiltration may constitute the key mechanism of chronic inflammation in DN.
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Affiliation(s)
- Ye Feng
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Xin Zhong
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Hai-Feng Ni
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Cui Wang
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Tao-Tao Tang
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Li-Ting Wang
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Kai-Yun Song
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Ri-Ning Tang
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Hong Liu
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Bi-Cheng Liu
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China
| | - Lin-Li Lv
- Institute of Nephrology, Zhongda Hospital, Southeast University School of Medicine, 87 Ding Jia Qiao Road, Nanjing, 210009, Jiangsu, China.
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19
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Johnson LA, Jackson DG. Hyaluronan and Its Receptors: Key Mediators of Immune Cell Entry and Trafficking in the Lymphatic System. Cells 2021; 10:cells10082061. [PMID: 34440831 PMCID: PMC8393520 DOI: 10.3390/cells10082061] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 08/06/2021] [Accepted: 08/08/2021] [Indexed: 02/07/2023] Open
Abstract
Entry to the afferent lymphatics marks the first committed step for immune cell migration from tissues to draining lymph nodes both for the generation of immune responses and for timely resolution of tissue inflammation. This critical process occurs primarily at specialised discontinuous junctions in initial lymphatic capillaries, directed by chemokines released from lymphatic endothelium and orchestrated by adhesion between lymphatic receptors and their immune cell ligands. Prominent amongst the latter is the large glycosaminoglycan hyaluronan (HA) that can form a bulky glycocalyx on the surface of certain tissue-migrating leucocytes and whose engagement with its key lymphatic receptor LYVE-1 mediates docking and entry of dendritic cells to afferent lymphatics. Here we outline the latest insights into the molecular mechanisms by which the HA glycocalyx together with LYVE-1 and the related leucocyte receptor CD44 co-operate in immune cell entry, and how the process is facilitated by the unusual character of LYVE-1 • HA-binding interactions. In addition, we describe how pro-inflammatory breakdown products of HA may also contribute to lymphatic entry by transducing signals through LYVE-1 for lymphangiogenesis and increased junctional permeability. Lastly, we outline some future perspectives and highlight the LYVE-1 • HA axis as a potential target for immunotherapy.
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20
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Yuan W, Xu C, Li B, Xia H, Pan Y, Zhong W, Xu L, Chen R, Wang B. Contributions of Costimulatory Molecule CD137 in Endothelial Cells. J Am Heart Assoc 2021; 10:e020721. [PMID: 34027676 PMCID: PMC8483511 DOI: 10.1161/jaha.120.020721] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
CD137 (4-1BB, tumor necrosis factor receptor superfamily 9) is a surface glycoprotein of the tumor necrosis factor receptor family that can be induced on a variety of immunocytes and nonimmune cells, including endothelial cells and smooth muscle cells. The importance of CD137 in immune response has been well recognized; however, the precise biological effects and underlying mechanisms of CD137 in endothelial cells are unclear. A single layer of cells called the endothelium constitutes the innermost layer of blood vessels including larger arteries, veins, the capillaries, and the lymphatic vessels. It not only acts as an important functional interface, but also participates in local inflammatory response. This review covers recent findings to illuminate the role of CD137 in endothelial cells in different pathophysiologic settings.
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Affiliation(s)
- Wei Yuan
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Chong Xu
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Bo Li
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Hao Xia
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Yingjie Pan
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Wei Zhong
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Liangjie Xu
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Rui Chen
- Department of Cardiology Affiliated Hospital of Jiangsu University Zhenjiang China
| | - Bin Wang
- Department of Geriatrics Union Hospital Tongji Medical CollegeHuazhong University of Science and Technology Wuhan China
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21
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Structure and Immune Function of Afferent Lymphatics and Their Mechanistic Contribution to Dendritic Cell and T Cell Trafficking. Cells 2021; 10:cells10051269. [PMID: 34065513 PMCID: PMC8161367 DOI: 10.3390/cells10051269] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/18/2021] [Accepted: 05/18/2021] [Indexed: 12/11/2022] Open
Abstract
Afferent lymphatic vessels (LVs) mediate the transport of antigen and leukocytes to draining lymph nodes (dLNs), thereby serving as immunologic communication highways between peripheral tissues and LNs. The main cell types migrating via this route are antigen-presenting dendritic cells (DCs) and antigen-experienced T cells. While DC migration is important for maintenance of tolerance and for induction of protective immunity, T cell migration through afferent LVs contributes to immune surveillance. In recent years, great progress has been made in elucidating the mechanisms of lymphatic migration. Specifically, time-lapse imaging has revealed that, upon entry into capillaries, both DCs and T cells are not simply flushed away with the lymph flow, but actively crawl and patrol and even interact with each other in this compartment. Detachment and passive transport to the dLN only takes place once the cells have reached the downstream, contracting collecting vessel segments. In this review, we describe how the anatomy of the lymphatic network supports leukocyte trafficking and provide updated knowledge regarding the cellular and molecular mechanisms responsible for lymphatic migration of DCs and T cells. In addition, we discuss the relevance of DC and T cell migration through afferent LVs and its presumed implications on immunity.
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22
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Steele MM, Lund AW. Afferent Lymphatic Transport and Peripheral Tissue Immunity. THE JOURNAL OF IMMUNOLOGY 2021; 206:264-272. [PMID: 33397740 DOI: 10.4049/jimmunol.2001060] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/11/2020] [Indexed: 12/30/2022]
Abstract
Lymphatic vessels provide an anatomical framework for immune surveillance and adaptive immune responses. Although appreciated as the route for Ag and dendritic cell transport, peripheral lymphatic vessels are often not considered active players in immune surveillance. Lymphatic vessels, however, integrate contextual cues that directly regulate transport, including changes in intrinsic pumping and capillary remodeling, and express a dynamic repertoire of inflammatory chemokines and adhesion molecules that facilitates leukocyte egress out of inflamed tissue. These mechanisms together contribute to the course of peripheral tissue immunity. In this review, we focus on context-dependent mechanisms that regulate fluid and cellular transport out of peripheral nonlymphoid tissues to provide a framework for understanding the effects of afferent lymphatic transport on immune surveillance, peripheral tissue inflammation, and adaptive immunity.
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Affiliation(s)
- Maria M Steele
- Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, NY 10016
| | - Amanda W Lund
- Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, NY 10016; .,Department of Pathology, New York University Grossman School of Medicine, New York, NY 10016; and.,Laura and Isaac Perlmutter Cancer Center, New York University Grossman School of Medicine, New York, NY 10016
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23
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Gremlin 1 + fibroblastic niche maintains dendritic cell homeostasis in lymphoid tissues. Nat Immunol 2021; 22:571-585. [PMID: 33903764 DOI: 10.1038/s41590-021-00920-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 03/19/2021] [Indexed: 01/31/2023]
Abstract
Fibroblastic reticular cells (FRCs) are specialized stromal cells that define tissue architecture and regulate lymphocyte compartmentalization, homeostasis, and innate and adaptive immunity in secondary lymphoid organs (SLOs). In the present study, we used single-cell RNA sequencing (scRNA-seq) of human and mouse lymph nodes (LNs) to identify a subset of T cell-zone FRCs defined by the expression of Gremlin1 (Grem1) in both species. Grem1-CreERT2 knock-in mice enabled localization, multi-omics characterization and genetic depletion of Grem1+ FRCs. Grem1+ FRCs primarily localize at T-B cell junctions of SLOs, neighboring pre-dendritic cells and conventional dendritic cells (cDCs). As such, their depletion resulted in preferential loss and decreased homeostatic proliferation and survival of resident cDCs and compromised T cell immunity. Trajectory analysis of human LN scRNA-seq data revealed expression similarities to murine FRCs, with GREM1+ cells marking the endpoint of both trajectories. These findings illuminate a new Grem1+ fibroblastic niche in LNs that functions to maintain the homeostasis of lymphoid tissue-resident cDCs.
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24
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Bastow CR, Bunting MD, Kara EE, McKenzie DR, Caon A, Devi S, Tolley L, Mueller SN, Frazer IH, Harvey N, Condina MR, Young C, Hoffmann P, McColl SR, Comerford I. Scavenging of soluble and immobilized CCL21 by ACKR4 regulates peripheral dendritic cell emigration. Proc Natl Acad Sci U S A 2021; 118:e2025763118. [PMID: 33875601 PMCID: PMC8092586 DOI: 10.1073/pnas.2025763118] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Leukocyte homing driven by the chemokine CCL21 is pivotal for adaptive immunity because it controls dendritic cell (DC) and T cell migration through CCR7. ACKR4 scavenges CCL21 and has been shown to play an essential role in DC trafficking at the steady state and during immune responses to tumors and cutaneous inflammation. However, the mechanism by which ACKR4 regulates peripheral DC migration is unknown, and the extent to which it regulates CCL21 in steady-state skin and lymph nodes (LNs) is contested. Specifically, our previous findings that CCL21 levels are increased in LNs of ACKR4-deficient mice [I. Comerford et al., Blood 116, 4130-4140 (2010)] were refuted [M. H. Ulvmar et al., Nat. Immunol. 15, 623-630 (2014)], and no differences in CCL21 levels in steady-state skin of ACKR4-deficient mice were reported despite compromised CCR7-dependent DC egress in these animals [S. A. Bryce et al., J. Immunol. 196, 3341-3353 (2016)]. Here, we resolve these issues and reveal that two forms of CCL21, full-length immobilized and cleaved soluble CCL21, exist in steady-state barrier tissues, and both are regulated by ACKR4. Without ACKR4, extracellular CCL21 gradients in barrier sites are saturated and nonfunctional, DCs cannot home directly to lymphatic vessels, and excess soluble CCL21 from peripheral tissues pollutes downstream LNs. The results identify the mechanism by which ACKR4 controls DC migration in barrier tissues and reveal a complex mode of CCL21 regulation in vivo, which enhances understanding of functional chemokine gradient formation.
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Affiliation(s)
- Cameron R Bastow
- Chemokine Biology Laboratory, Department of Molecular and Biomedical Science, School of Biological Science, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Mark D Bunting
- Chemokine Biology Laboratory, Department of Molecular and Biomedical Science, School of Biological Science, The University of Adelaide, Adelaide, SA 5005, Australia
- Genome Editing Laboratory, School of Medicine, The University of Adelaide, Adelaide, SA 5000, Australia
| | - Ervin E Kara
- Chemokine Biology Laboratory, Department of Molecular and Biomedical Science, School of Biological Science, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Duncan R McKenzie
- Chemokine Biology Laboratory, Department of Molecular and Biomedical Science, School of Biological Science, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Adriana Caon
- Chemokine Biology Laboratory, Department of Molecular and Biomedical Science, School of Biological Science, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Sapna Devi
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
| | - Lynn Tolley
- The University of Queensland Diamantina Institute, Translational Research Institute, Woolloongabba, QLD 4102, Australia
| | - Scott N Mueller
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
| | - Ian H Frazer
- The University of Queensland Diamantina Institute, Translational Research Institute, Woolloongabba, QLD 4102, Australia
| | - Natasha Harvey
- Centre for Cancer Biology, University of South Australia and SA Pathology, Adelaide, SA 5000, Australia
| | - Mark R Condina
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Clifford Young
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Peter Hoffmann
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Shaun R McColl
- Chemokine Biology Laboratory, Department of Molecular and Biomedical Science, School of Biological Science, The University of Adelaide, Adelaide, SA 5005, Australia;
| | - Iain Comerford
- Chemokine Biology Laboratory, Department of Molecular and Biomedical Science, School of Biological Science, The University of Adelaide, Adelaide, SA 5005, Australia;
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25
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In Sickness and in Health: The Immunological Roles of the Lymphatic System. Int J Mol Sci 2021; 22:ijms22094458. [PMID: 33923289 PMCID: PMC8123157 DOI: 10.3390/ijms22094458] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 02/06/2023] Open
Abstract
The lymphatic system plays crucial roles in immunity far beyond those of simply providing conduits for leukocytes and antigens in lymph fluid. Endothelial cells within this vasculature are distinct and highly specialized to perform roles based upon their location. Afferent lymphatic capillaries have unique intercellular junctions for efficient uptake of fluid and macromolecules, while expressing chemotactic and adhesion molecules that permit selective trafficking of specific immune cell subsets. Moreover, in response to events within peripheral tissue such as inflammation or infection, soluble factors from lymphatic endothelial cells exert “remote control” to modulate leukocyte migration across high endothelial venules from the blood to lymph nodes draining the tissue. These immune hubs are highly organized and perfectly arrayed to survey antigens from peripheral tissue while optimizing encounters between antigen-presenting cells and cognate lymphocytes. Furthermore, subsets of lymphatic endothelial cells exhibit differences in gene expression relating to specific functions and locality within the lymph node, facilitating both innate and acquired immune responses through antigen presentation, lymph node remodeling and regulation of leukocyte entry and exit. This review details the immune cell subsets in afferent and efferent lymph, and explores the mechanisms by which endothelial cells of the lymphatic system regulate such trafficking, for immune surveillance and tolerance during steady-state conditions, and in response to infection, acute and chronic inflammation, and subsequent resolution.
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26
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Bioengineered in vitro models of leukocyte-vascular interactions. Biochem Soc Trans 2021; 49:693-704. [PMID: 33843967 DOI: 10.1042/bst20200620] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 03/12/2021] [Accepted: 03/18/2021] [Indexed: 01/13/2023]
Abstract
Leukocytes continuously circulate our body through the blood and lymphatic vessels. To survey invaders or abnormalities and defend our body against them, blood-circulating leukocytes migrate from the blood vessels into the interstitial tissue space (leukocyte extravasation) and exit the interstitial tissue space through draining lymphatic vessels (leukocyte intravasation). In the process of leukocyte trafficking, leukocytes recognize and respond to multiple biophysical and biochemical cues in these vascular microenvironments to determine adequate migration and adhesion pathways. As leukocyte trafficking is an essential part of the immune system and is involved in numerous immune diseases and related immunotherapies, researchers have attempted to identify the key biophysical and biochemical factors that might be responsible for leukocyte migration, adhesion, and trafficking. Although intravital live imaging of in vivo animal models has been remarkably advanced and utilized, bioengineered in vitro models that recapitulate complicated in vivo vascular structure and microenvironments are needed to better understand leukocyte trafficking since these in vitro models better allow for spatiotemporal analyses of leukocyte behaviors, decoupling of interdependent biological factors, better controlling of experimental parameters, reproducible experiments, and quantitative cellular analyses. This review discusses bioengineered in vitro model systems that are developed to study leukocyte interactions with complex microenvironments of blood and lymphatic vessels. This review focuses on the emerging concepts and methods in generating relevant biophysical and biochemical cues. Finally, the review concludes with expert perspectives on the future research directions for investigating leukocyte and vascular biology using the in vitro models.
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27
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Vaahtomeri K, Moussion C, Hauschild R, Sixt M. Shape and Function of Interstitial Chemokine CCL21 Gradients Are Independent of Heparan Sulfates Produced by Lymphatic Endothelium. Front Immunol 2021; 12:630002. [PMID: 33717158 PMCID: PMC7946817 DOI: 10.3389/fimmu.2021.630002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/20/2021] [Indexed: 12/30/2022] Open
Abstract
Gradients of chemokines and growth factors guide migrating cells and morphogenetic processes. Migration of antigen-presenting dendritic cells from the interstitium into the lymphatic system is dependent on chemokine CCL21, which is secreted by endothelial cells of the lymphatic capillary, binds heparan sulfates and forms gradients decaying into the interstitium. Despite the importance of CCL21 gradients, and chemokine gradients in general, the mechanisms of gradient formation are unclear. Studies on fibroblast growth factors have shown that limited diffusion is crucial for gradient formation. Here, we used the mouse dermis as a model tissue to address the necessity of CCL21 anchoring to lymphatic capillary heparan sulfates in the formation of interstitial CCL21 gradients. Surprisingly, the absence of lymphatic endothelial heparan sulfates resulted only in a modest decrease of CCL21 levels at the lymphatic capillaries and did neither affect interstitial CCL21 gradient shape nor dendritic cell migration toward lymphatic capillaries. Thus, heparan sulfates at the level of the lymphatic endothelium are dispensable for the formation of a functional CCL21 gradient.
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Affiliation(s)
- Kari Vaahtomeri
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria.,Wihuri Research Institute and Translational Cancer Medicine Research Program, University of Helsinki, Biomedicum Helsinki, Helsinki, Finland
| | - Christine Moussion
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria
| | - Robert Hauschild
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria
| | - Michael Sixt
- Institute of Science and Technology Austria (IST Austria), Klosterneuburg, Austria
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28
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Mao S, Ou X, Wang M, Sun D, Yang Q, Wu Y, Jia R, Zhu D, Zhao X, Chen S, Liu M, Zhang S, Huang J, Gao Q, Liu Y, Yu Y, Zhang L, Tian B, Pan L, Chen X, Cheng A. Duck hepatitis A virus 1 has lymphoid tissue tropism altering the organic immune responses of mature ducks. Transbound Emerg Dis 2020; 68:3588-3600. [PMID: 33369177 DOI: 10.1111/tbed.13966] [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] [Received: 09/06/2020] [Revised: 12/17/2020] [Accepted: 12/23/2020] [Indexed: 12/18/2022]
Abstract
Duck hepatitis A virus 1 (DHAV-1) is a highly prevalent pathogen within adult ducks causing acute as well as chronic hepatitis which closely emulates the progression of human hepatitis. However, the underlying mechanisms of DHAV-1 persistence and the pathogenesis of chronic liver disease are not well defined. The association between hematopoietic reservoirs of virus and persistent infection is increasingly concerning. Here, we explored the ability of lymphoid replication of DHAV-1 and the effect on immunity. We found that DHAV-1 was able to infect and replicate productively in the lymphoid organs of model ducks, persisting over 6 months. Moreover, a significant correlation of viral loads between these organs and blood was found, documenting a major contribution of lymphoid replication to DHAV-1 viraemia. Along with viral replication, the mRNA of PRRs and immune-related cytokines was up-regulated in these organs during the early phase of infection, showing tissue-dependent expression patterns but all inclining towards Th2 responses due to the consistently higher level of IL-4 than IL-2 and IFN-γ. Additionally, the expression of CCL19, CCL21, MHC-I and MHC-II, which are involved in T cell homing to the periphery and priming, was dysmodulated. Our data indicate that DHAV-1 possesses lymphoid tissue tropism, contributing to persistent infection and chronic hepatitis via altering the early endogenous transcription of immune-related genes and thereby perturbing organic immunity. These results may be useful to develop novel strategies to treat chronic viral hepatitis based on stimulation of the early innate system and regulation of T-cell trafficking.
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Affiliation(s)
- Sai Mao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Xumin Ou
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Mingshu Wang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Di Sun
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Qiao Yang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Ying Wu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Renyong Jia
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Dekang Zhu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Xinxin Zhao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Shun Chen
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Mafeng Liu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Shaqiu Zhang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Juan Huang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Qun Gao
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Yunya Liu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Yanling Yu
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Ling Zhang
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Bin Tian
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Leichang Pan
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Xiaoyue Chen
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
| | - Anchun Cheng
- Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China.,Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu City, China.,Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu City, China
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29
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Pires A, Greenshields-Watson A, Jones E, Smart K, Lauder SN, Somerville M, Milutinovic S, Kendrick H, Hindley JP, French R, Smalley MJ, Watkins WJ, Andrews R, Godkin A, Gallimore A. Immune Remodeling of the Extracellular Matrix Drives Loss of Cancer Stem Cells and Tumor Rejection. Cancer Immunol Res 2020; 8:1520-1531. [PMID: 33023965 PMCID: PMC7611107 DOI: 10.1158/2326-6066.cir-20-0070] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/19/2020] [Accepted: 10/02/2020] [Indexed: 12/18/2022]
Abstract
The nature of the tumor microenvironment (TME) influences the ability of tumor-specific T cells to control tumor growth. In this study, we performed an unbiased comparison of the TME of regulatory T-cell (Treg)-replete and Treg-depleted carcinogen-induced tumors, including Treg-depleted responding (regressing) and non-responding (growing) tumors. This analysis revealed an inverse relationship between extracellular matrix (ECM) and T-cell infiltrates where responding tumors were T-cell rich and ECM poor, whereas the converse was observed in non-responder tumors. For this reason, we hypothesized that the ECM acted as a barrier to successful T-cell infiltration and tumor rejection. However, further experiments revealed that this was not the case but instead showed that an effective T-cell response dramatically altered the density of ECM in the TME. Along with loss of ECM and high numbers of infiltrating T cells, responder tumors were distinguished by the development of lymphatic and blood vessel networks with specialized immune function. ECM-rich tumors exhibited a stem cell-like gene expression profile and superior tumor-initiating capacity, whereas such features were absent in responder tumors. Overall, these findings define an extended role for an effective immune response, not just in direct killing of tumor cells but in widescale remodeling of the TME to favor loss of ECM, elimination of cancer stem cells, and propagation of adaptive immunity.
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Affiliation(s)
- Ana Pires
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom.
| | - Alexander Greenshields-Watson
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Emma Jones
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Kathryn Smart
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Sarah N Lauder
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Michelle Somerville
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Stefan Milutinovic
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Howard Kendrick
- European Cancer Stem Cell Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, United Kingdom
| | - James P Hindley
- Indoor Biotechnologies, Vision Court, Cardiff, United Kingdom
| | - Rhiannon French
- European Cancer Stem Cell Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, United Kingdom
| | - Matthew J Smalley
- European Cancer Stem Cell Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, United Kingdom
| | - William J Watkins
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Robert Andrews
- Systems Immunity Research Institute, Cardiff University, Cardiff, United Kingdom
| | - Andrew Godkin
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
| | - Awen Gallimore
- Infection and Immunity, School of Medicine, Cardiff University, Henry Wellcome Building, University Hospital of Wales, Cardiff, United Kingdom
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30
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Tfh Cells in Health and Immunity: Potential Targets for Systems Biology Approaches to Vaccination. Int J Mol Sci 2020; 21:ijms21228524. [PMID: 33198297 PMCID: PMC7696930 DOI: 10.3390/ijms21228524] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 12/16/2022] Open
Abstract
T follicular helper (Tfh) cells are a specialised subset of CD4+ T cells that play a significant role in the adaptive immune response, providing critical help to B cells within the germinal centres (GC) of secondary lymphoid organs. The B cell receptors of GC B cells undergo multiple rounds of somatic hypermutation and affinity maturation within the GC response, a process dependent on cognate interactions with Tfh cells. B cells that receive sufficient help from Tfh cells form antibody-producing long-lived plasma and memory B cells that provide the basis of decades of effective and efficient protection and are considered the gold standard in correlates of protection post-vaccination. However, the T cell response to vaccination has been understudied, and over the last 10 years, exponential improvements in the technological underpinnings of sampling techniques, experimental and analytical tools have allowed multidisciplinary characterisation of the role of T cells and the immune system as a whole. Of particular interest to the field of vaccinology are GCs and Tfh cells, representing a unique target for improving immunisation strategies. Here, we discuss recent insights into the unique journey of Tfh cells from thymus to lymph node during differentiation and their role in the production of high-quality antibody responses as well as their journey back to the periphery as a population of memory cells. Further, we explore their function in health and disease and the power of next-generation sequencing techniques to uncover their potential as modulators of vaccine-induced immunity.
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31
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Posch W, Bermejo-Jambrina M, Lass-Flörl C, Wilflingseder D. Role of Complement Receptors (CRs) on DCs in Anti-HIV-1 Immunity. Front Immunol 2020; 11:572114. [PMID: 33224139 PMCID: PMC7670068 DOI: 10.3389/fimmu.2020.572114] [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: 06/12/2020] [Accepted: 10/06/2020] [Indexed: 12/12/2022] Open
Abstract
Upon entry of human immunodeficiency virus 1 (HIV-1) into the host, innate immune mechanisms are acting as a first line of defense, that considerably also modify adaptive immunity by the provision of specific signals. Innate and adaptive immune responses are intimately linked and dendritic cells (DCs) together with complement (C) play an important role in regulation of adaptive immunity. Initially, the role of complement was considered to primarily support – or COMPLEMENT - cytolytic actions of antibodies or antibody-complexed antigens (immune complexes, ICs) or directly kill the pathogens by complement-mediated lysis. Recently, the role of complement was revised and found to significantly augmenting and modulating adaptive immunity, in particular against viruses. Complement and DCs are therefore predestined to open novel avenues for antiviral research and potential therapeutic interventions. Recent studies on interactions of complement-opsonized HIV-1 with DCs demonstrated a high potential of such primed DCs to initiate efficient antiviral and cytotoxic anti-HIV-1 immunity and complement-coated viral particles shift DCs functions via CR3 and CR4 in an antithetic manner. This review will focus on our current knowledge of CR3 and CR4 actions on DCs during HIV-1 binding and the outcome of infection influenced by entry and signaling pathways.
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Affiliation(s)
- Wilfried Posch
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Marta Bermejo-Jambrina
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria.,Department of Experimental Immunology, Amsterdam Infection and Immunity Institute, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Cornelia Lass-Flörl
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | - Doris Wilflingseder
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
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32
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Manspeaker MP, Thomas SN. Lymphatic immunomodulation using engineered drug delivery systems for cancer immunotherapy. Adv Drug Deliv Rev 2020; 160:19-35. [PMID: 33058931 PMCID: PMC7736326 DOI: 10.1016/j.addr.2020.10.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 10/01/2020] [Accepted: 10/07/2020] [Indexed: 12/12/2022]
Abstract
Though immunotherapy has revolutionized the treatment of cancer to improve disease outcomes, an array of challenges remain that limit wider clinical success, including low rate of response and immune-related adverse events. Targeting immunomodulatory drugs to therapeutically relevant tissues offers a way to overcome these challenges by potentially enabling enhanced therapeutic efficacy and decreased incidence of side effects. Research highlighting the importance of lymphatic tissues in the response to immunotherapy has increased interest in the application of engineered drug delivery systems (DDSs) to enable specific targeting of immunomodulators to lymphatic tissues and cells that they house. To this end, a variety of DDS platforms have been developed that enable more efficient uptake into lymphatic vessels and lymph nodes to provide targeted modulation of the immune response to cancer. This can occur either by delivery of immunotherapeutics to lymphatics tissues or by direct modulation of the lymphatic vasculature itself due to their direct involvement in tumor immune processes. This review will highlight DDS platforms that, by enabling the activities of cancer vaccines, chemotherapeutics, immune checkpoint blockade (ICB) antibodies, and anti- or pro-lymphangiogenic factors to lymphatic tissues through directed delivery and controlled release, augment cancer immunotherapy.
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Affiliation(s)
- Margaret P Manspeaker
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, United States of America; Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States of America
| | - Susan N Thomas
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States of America; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, United States of America; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, United States of America; Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA, United States of America.
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33
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Baluk P, Naikawadi RP, Kim S, Rodriguez F, Choi D, Hong YK, Wolters PJ, McDonald DM. Lymphatic Proliferation Ameliorates Pulmonary Fibrosis after Lung Injury. THE AMERICAN JOURNAL OF PATHOLOGY 2020; 190:2355-2375. [PMID: 33039355 DOI: 10.1016/j.ajpath.2020.08.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 08/09/2020] [Accepted: 08/27/2020] [Indexed: 12/11/2022]
Abstract
Despite many reports about pulmonary blood vessels in lung fibrosis, the contribution of lymphatics to fibrosis is unknown. We examined the mechanism and consequences of lymphatic remodeling in mice with lung fibrosis after bleomycin injury or telomere dysfunction. Widespread lymphangiogenesis was observed after bleomycin treatment and in fibrotic lungs of prospero homeobox 1-enhanced green fluorescent protein (Prox1-EGFP) transgenic mice with telomere dysfunction. In loss-of-function studies, blocking antibodies revealed that lymphangiogenesis 14 days after bleomycin treatment was dependent on vascular endothelial growth factor (Vegf) receptor 3 signaling, but not on Vegf receptor 2. Vegfc gene and protein expression increased specifically. Extensive extravasated plasma, platelets, and macrophages at sites of lymphatic growth were potential sources of Vegfc. Lymphangiogenesis peaked at 14 to 28 days after bleomycin challenge, was accompanied by doubling of chemokine (C-C motif) ligand 21 in lung lymphatics and tertiary lymphoid organ formation, and then decreased as lung injury resolved by 56 days. In gain-of-function studies, expansion of the lung lymphatic network by transgenic overexpression of Vegfc in club cell secretory protein (CCSP)/VEGF-C mice reduced macrophage accumulation and fibrosis and accelerated recovery after bleomycin treatment. These findings suggest that lymphatics have an overall protective effect in lung injury and fibrosis and fit with a mechanism whereby lung lymphatic network expansion reduces lymph stasis and increases clearance of fluid and cells, including profibrotic macrophages.
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Affiliation(s)
- Peter Baluk
- Department of Anatomy, University of California, San Francisco, San Francisco, California; Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California; UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California.
| | - Ram P Naikawadi
- Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, San Francisco, California
| | - Shineui Kim
- Department of Anatomy, University of California, San Francisco, San Francisco, California
| | - Felipe Rodriguez
- Department of Anatomy, University of California, San Francisco, San Francisco, California
| | - Dongwon Choi
- Department of Surgery, University of Southern California, Los Angeles, California
| | - Young-Kwon Hong
- Department of Surgery, University of Southern California, Los Angeles, California
| | - Paul J Wolters
- Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, San Francisco, California
| | - Donald M McDonald
- Department of Anatomy, University of California, San Francisco, San Francisco, California; Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California; UCSF Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, San Francisco, California.
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Abstract
PURPOSE OF REVIEW Chemokines are a large group of low molecular weight cytokines that attract and activate leukocytes throughout the body and therefore have a key role in the framework of late-phase allergic responses. The purpose of this article is to provide an overview of the main chemokines involved in allergic conjunctivitis, their primary functions and their physiological roles, and therapies targeted at chemokines and their receptors for ocular allergic diseases. RECENT FINDINGS In recent years, there have been considerable advances in the understanding of ocular pathophysiology of ocular surface inflammatory diseases including both allergic eye diseases and dry eye syndrome. Several therapies being developed for dry eye inflammation are recognized as possible therapies for ocular allergic diseases as there are often common chemokines involved in both disease spectra. SUMMARY Chemokines represent an integral part of the late-phase cascade of ocular allergic inflammation. A deep understanding of specific chemokines and their interactions will help in targeting therapies to effectively manage ocular clinical findings and symptoms of allergic eye disease.
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35
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de Winde CM, Munday C, Acton SE. Molecular mechanisms of dendritic cell migration in immunity and cancer. Med Microbiol Immunol 2020; 209:515-529. [PMID: 32451606 PMCID: PMC7395046 DOI: 10.1007/s00430-020-00680-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 05/07/2020] [Indexed: 12/18/2022]
Abstract
Dendritic cells (DCs) are a heterogeneous population of antigen-presenting cells that act to bridge innate and adaptive immunity. DCs are critical in mounting effective immune responses to tissue damage, pathogens and cancer. Immature DCs continuously sample tissues and engulf antigens via endocytic pathways such as phagocytosis or macropinocytosis, which result in DC activation. Activated DCs undergo a maturation process by downregulating endocytosis and upregulating surface proteins controlling migration to lymphoid tissues where DC-mediated antigen presentation initiates adaptive immune responses. To traffic to lymphoid tissues, DCs must adapt their motility mechanisms to migrate within a wide variety of tissue types and cross barriers to enter lymphatics. All steps of DC migration involve cell-cell or cell-substrate interactions. This review discusses DC migration mechanisms in immunity and cancer with a focus on the role of cytoskeletal processes and cell surface proteins, including integrins, lectins and tetraspanins. Understanding the adapting molecular mechanisms controlling DC migration in immunity provides the basis for therapeutic interventions to dampen immune activation in autoimmunity, or to improve anti-tumour immune responses.
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Affiliation(s)
- Charlotte M de Winde
- Stromal Immunology Group, MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, WC1E 6BT, UK.
| | - Clare Munday
- Stromal Immunology Group, MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, WC1E 6BT, UK
| | - Sophie E Acton
- Stromal Immunology Group, MRC Laboratory for Molecular Cell Biology, University College London, Gower Street, London, WC1E 6BT, UK
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36
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Wong BW. Lymphatic vessels in solid organ transplantation and immunobiology. Am J Transplant 2020; 20:1992-2000. [PMID: 32027464 DOI: 10.1111/ajt.15806] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/14/2020] [Accepted: 01/31/2020] [Indexed: 01/25/2023]
Abstract
With the recent advances in our understanding of the function and biology of the lymphatic vascular system, it is clear that the lymphatic system plays an integral role in physiology, and in pathological settings, may contribute to either enhance or repress inflammation and disease progression. Inflammation is central to both acute and chronic rejection in the context of solid organ transplantation, and emerging evidence suggests the lymphatic system plays a key role in shaping outcomes. The goals of this review are to highlight and contextualize the roles of lymphatic vessels and lymphangiogenesis in immunobiology, the impact immunosuppressive therapies have on the lymphatic system and emerging evidence of organ-specific heterogeneity of lymphatic vessels in the context of solid organ transplantation.
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Affiliation(s)
- Brian W Wong
- Laboratory of Lymphatic Metabolism + Epigenetics, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri, USA
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37
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Jafree DJ, Long DA. Beyond a Passive Conduit: Implications of Lymphatic Biology for Kidney Diseases. J Am Soc Nephrol 2020; 31:1178-1190. [PMID: 32295825 DOI: 10.1681/asn.2019121320] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The kidney contains a network of lymphatic vessels that clear fluid, small molecules, and cells from the renal interstitium. Through modulating immune responses and via crosstalk with surrounding renal cells, lymphatic vessels have been implicated in the progression and maintenance of kidney disease. In this Review, we provide an overview of the development, structure, and function of lymphatic vessels in the healthy adult kidney. We then highlight the contributions of lymphatic vessels to multiple forms of renal pathology, emphasizing CKD, transplant rejection, and polycystic kidney disease and discuss strategies to target renal lymphatics using genetic and pharmacologic approaches. Overall, we argue the case for lymphatics playing a fundamental role in renal physiology and pathology and treatments modulating these vessels having therapeutic potential across the spectrum of kidney disease.
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Affiliation(s)
- Daniyal J Jafree
- Developmental Biology and Cancer Programme, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom.,MB/PhD Programme, Faculty of Medical Sciences, University College London, London, United Kingdom
| | - David A Long
- Developmental Biology and Cancer Programme, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
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38
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Xiong Y, Piao W, Brinkman CC, Li L, Kulinski JM, Olivera A, Cartier A, Hla T, Hippen KL, Blazar BR, Schwab SR, Bromberg JS. CD4 T cell sphingosine 1-phosphate receptor (S1PR)1 and S1PR4 and endothelial S1PR2 regulate afferent lymphatic migration. Sci Immunol 2020; 4:4/33/eaav1263. [PMID: 30877143 DOI: 10.1126/sciimmunol.aav1263] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 01/29/2019] [Indexed: 12/12/2022]
Abstract
Sphingosine 1-phosphate (S1P) and S1P receptors (S1PRs) regulate migration of lymphocytes out of thymus to blood and lymph nodes (LNs) to efferent lymph, whereas their role in other tissue sites is not known. Here, we investigated the question of how these molecules regulate leukocyte migration from tissues through afferent lymphatics to draining LNs (dLNs). S1P, but not other chemokines, selectively enhanced human and murine CD4 T cell migration across lymphatic endothelial cells (LECs). T cell S1PR1 and S1PR4, and LEC S1PR2, were required for migration across LECs and into lymphatic vessels and dLNs. S1PR1 and S1PR4 differentially regulated T cell motility and vascular cell adhesion molecule-1 (VCAM-1) binding. S1PR2 regulated LEC layer structure, permeability, and expression of the junction molecules VE-cadherin, occludin, and zonulin-1 through the ERK pathway. S1PR2 facilitated T cell transcellular migration through VCAM-1 expression and recruitment of T cells to LEC migration sites. These results demonstrated distinct roles for S1PRs in comodulating T cell and LEC functions in migration and suggest previously unknown levels of regulation of leukocytes and endothelial cells during homeostasis and immunity.
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Affiliation(s)
- Yanbao Xiong
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.,Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Wenji Piao
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.,Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - C Colin Brinkman
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Lushen Li
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA.,Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Joseph M Kulinski
- Mast Cell Biology Section, Laboratory of Allergic Diseases, NIAID, NIH, Bethesda, MD 20892, USA
| | - Ana Olivera
- Mast Cell Biology Section, Laboratory of Allergic Diseases, NIAID, NIH, Bethesda, MD 20892, USA
| | - Andreane Cartier
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 20115, USA.,Department of Surgery, Harvard Medical School, Boston, MA 20115, USA
| | - Timothy Hla
- Vascular Biology Program, Boston Children's Hospital, Boston, MA 20115, USA.,Department of Surgery, Harvard Medical School, Boston, MA 20115, USA
| | - Keli L Hippen
- University of Minnesota Cancer Center and the Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, MN 55455, USA
| | - Bruce R Blazar
- University of Minnesota Cancer Center and the Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, MN 55455, USA
| | - Susan R Schwab
- Skirball Institute of Biomolecular Medicine, New York University School of Medicine, New York, NY 10016, USA
| | - Jonathan S Bromberg
- Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA. .,Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD 21201, USA.,Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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39
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Engelbrecht E, Levesque MV, He L, Vanlandewijck M, Nitzsche A, Niazi H, Kuo A, Singh SA, Aikawa M, Holton K, Proia RL, Kono M, Pu WT, Camerer E, Betsholtz C, Hla T. Sphingosine 1-phosphate-regulated transcriptomes in heterogenous arterial and lymphatic endothelium of the aorta. eLife 2020; 9:52690. [PMID: 32091396 PMCID: PMC7054001 DOI: 10.7554/elife.52690] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 02/22/2020] [Indexed: 12/17/2022] Open
Abstract
Despite the medical importance of G protein-coupled receptors (GPCRs), in vivo cellular heterogeneity of GPCR signaling and downstream transcriptional responses are not understood. We report the comprehensive characterization of transcriptomes (bulk and single-cell) and chromatin domains regulated by sphingosine 1-phosphate receptor-1 (S1PR1) in adult mouse aortic endothelial cells. First, S1PR1 regulates NFκB and nuclear glucocorticoid receptor pathways to suppress inflammation-related mRNAs. Second, S1PR1 signaling in the heterogenous endothelial cell (EC) subtypes occurs at spatially-distinct areas of the aorta. For example, a transcriptomically distinct arterial EC population at vascular branch points (aEC1) exhibits ligand-independent S1PR1/ß-arrestin coupling. In contrast, circulatory S1P-dependent S1PR1/ß-arrestin coupling was observed in non-branch point aEC2 cells that exhibit an inflammatory gene expression signature. Moreover, S1P/S1PR1 signaling regulates the expression of lymphangiogenic and inflammation-related transcripts in an adventitial lymphatic EC (LEC) population in a ligand-dependent manner. These insights add resolution to existing concepts of endothelial heterogeneity, GPCR signaling and S1P biology.
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Affiliation(s)
- Eric Engelbrecht
- Vascular Biology Program, Boston Children's Hospital, Deapartment of Surgery, Harvard Medical School, Boston, United States
| | - Michel V Levesque
- Vascular Biology Program, Boston Children's Hospital, Deapartment of Surgery, Harvard Medical School, Boston, United States
| | - Liqun He
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden.,Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Karolinska Institutet, Huddinge, Sweden
| | - Michael Vanlandewijck
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden.,Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Karolinska Institutet, Huddinge, Sweden
| | - Anja Nitzsche
- Université de Paris, INSERM U970, Paris Cardiovascular Research Center, Paris, France
| | - Hira Niazi
- Université de Paris, INSERM U970, Paris Cardiovascular Research Center, Paris, France
| | - Andrew Kuo
- Vascular Biology Program, Boston Children's Hospital, Deapartment of Surgery, Harvard Medical School, Boston, United States
| | - Sasha A Singh
- Center for Interdisciplinary Cardiovascular Sciences, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - Masanori Aikawa
- Center for Interdisciplinary Cardiovascular Sciences, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, United States
| | - Kristina Holton
- Harvard Medical School Research Computing, Boston, United States
| | - Richard L Proia
- Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, United States
| | - Mari Kono
- Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, United States
| | - William T Pu
- Department of Cardiology, Boston Children's Hospital, Harvard Medical School, Boston, United States.,Harvard Stem Cell Institute, Harvard University, Cambridge, United States
| | - Eric Camerer
- Université de Paris, INSERM U970, Paris Cardiovascular Research Center, Paris, France
| | - Christer Betsholtz
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, Sweden.,Karolinska Institutet/AstraZeneca Integrated Cardio Metabolic Centre (KI/AZ ICMC), Karolinska Institutet, Huddinge, Sweden
| | - Timothy Hla
- Vascular Biology Program, Boston Children's Hospital, Deapartment of Surgery, Harvard Medical School, Boston, United States
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40
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Stanly TA, Fritzsche M, Banerji S, Shrestha D, Schneider F, Eggeling C, Jackson DG. The cortical actin network regulates avidity-dependent binding of hyaluronan by the lymphatic vessel endothelial receptor LYVE-1. J Biol Chem 2020; 295:5036-5050. [PMID: 32034091 PMCID: PMC7152780 DOI: 10.1074/jbc.ra119.011992] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/29/2020] [Indexed: 12/16/2022] Open
Abstract
Lymphatic vessel endothelial hyaluronan receptor 1 (LYVE-1) mediates the docking and entry of dendritic cells to lymphatic vessels through selective adhesion to its ligand hyaluronan in the leukocyte surface glycocalyx. To bind hyaluronan efficiently, LYVE-1 must undergo surface clustering, a process that is induced efficiently by the large cross-linked assemblages of glycosaminoglycan present within leukocyte pericellular matrices but is induced poorly by the shorter polymer alone. These properties suggested that LYVE-1 may have limited mobility in the endothelial plasma membrane, but no biophysical investigation of these parameters has been carried out to date. Here, using super-resolution fluorescence microscopy and spectroscopy combined with biochemical analyses of the receptor in primary lymphatic endothelial cells, we provide the first evidence that LYVE-1 dynamics are indeed restricted by the submembranous actin network. We show that actin disruption not only increases LYVE-1 lateral diffusion but also enhances hyaluronan-binding activity. However, unlike the related leukocyte HA receptor CD44, which uses ERM and ankyrin motifs within its cytoplasmic tail to bind actin, LYVE-1 displays little if any direct interaction with actin, as determined by co-immunoprecipitation. Instead, as shown by super-resolution stimulated emission depletion microscopy in combination with fluorescence correlation spectroscopy, LYVE-1 diffusion is restricted by transient entrapment within submembranous actin corrals. These results point to an actin-mediated constraint on LYVE-1 clustering in lymphatic endothelium that tunes the receptor for selective engagement with hyaluronan assemblages in the glycocalyx that are large enough to cross-bridge the corral-bound LYVE-1 molecules and thereby facilitate leukocyte adhesion and transmigration.
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Affiliation(s)
- Tess A Stanly
- Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom.,York Biomedical Research Institute, Department of Biology, University of York, York YO10 5DD, United Kingdom
| | - Marco Fritzsche
- Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom.,Kennedy Institute for Rheumatology, University of Oxford, Oxford OX3 7FY, United Kingdom
| | - Suneale Banerji
- Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Dilip Shrestha
- Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Falk Schneider
- Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Christian Eggeling
- Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom .,Wolfson Imaging Centre, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom.,Leibniz Institute of Photonic Technology e.V., Albert-Einstein-Strasse 9, 07745 Jena, Germany.,Institute of Applied Optics and Biophysics, Friedrich-Schiller-University Jena, Max-Wien Platz 4, 07743 Jena, Germany
| | - David G Jackson
- Medical Research Council Human Immunology Unit, University of Oxford, Oxford OX3 9DS, United Kingdom
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41
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Liu MZ, Chen SM, Xu Y, Kong YG, Deng YQ, Li F, Tao ZZ. Increased Expressions and Roles of CC Chemokine Ligand 21 and CC Chemokine Ligand 25 in Chronic Rhinosinusitis with Nasal Polyps. Int Arch Allergy Immunol 2019; 181:159-169. [PMID: 31825941 DOI: 10.1159/000504476] [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: 04/08/2019] [Accepted: 10/31/2019] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Chronic rhinosinusitis (CRS) is a local inflammation of the nasal mucosa and sinus that persists for >12 weeks. As CC chemokine ligand (CCL) 19 expression is known to be elevated in CRS, and CCL 19, CCL21, and CCL25 share the same atypical chemokine receptor 4, so we focused on CCL21 and CCL25. OBJECTIVES To investigate the expression of CCL21 and CCL25 in different types of CRS and their significance in CRS development. METHODS A total of 116 patients participated in the study, and uncinate process mucosa or nasal polyp (NP) specimens were collected during surgery. Western blotting and immunohistochemistry were performed to detect the expression of CCL21 and CCL25, respectively, in the nasal mucosa. Immunofluorescence was used to determine their cellular localization in NPs, whereas macrophage culture was used to determine their relationships with macrophages. RESULTS Immunohistochemistry revealed that the expressions of CCL21 and CCL25 were increased in NPs only. Western blotting revealed that these expressions were gradually increased in control, CRS without NP and CRS with NP groups and were positively correlated with disease severity. Furthermore, increased expressions of CCL21 and CCL25 in NPs were not related to eosinophil infiltration. Immunofluorescence results demonstrated colocalization of CCL25+ cells and CD68+ macrophages. CCL25 expression was increased in macrophage culture, especially in M1 macrophages, while CCL21 expression was not significantly associated with macrophages. CONCLUSIONS CCL21 and CCL25 were significantly upregulated in NPs and positively correlated with disease severity. CCL25 upregulation was related to M1 macrophages.
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Affiliation(s)
- Meng-Zhi Liu
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China.,Otolaryngology-Head and Neck Surgery Research Institute, Renmin Hospital of Wuhan University, Wuhan, China
| | - Shi-Ming Chen
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China.,Otolaryngology-Head and Neck Surgery Research Institute, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yu Xu
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China.,Otolaryngology-Head and Neck Surgery Research Institute, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yong-Gang Kong
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China.,Otolaryngology-Head and Neck Surgery Research Institute, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yu-Qin Deng
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China.,Otolaryngology-Head and Neck Surgery Research Institute, Renmin Hospital of Wuhan University, Wuhan, China
| | - Fen Li
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China.,Otolaryngology-Head and Neck Surgery Research Institute, Renmin Hospital of Wuhan University, Wuhan, China
| | - Ze-Zhang Tao
- Department of Otolaryngology‑Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan, China, .,Otolaryngology-Head and Neck Surgery Research Institute, Renmin Hospital of Wuhan University, Wuhan, China,
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42
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Howe SE, Shillova N, Konjufca V. Dissemination of Chlamydia from the reproductive tract to the gastro-intestinal tract occurs in stages and relies on Chlamydia transport by host cells. PLoS Pathog 2019; 15:e1008207. [PMID: 31790512 PMCID: PMC6907867 DOI: 10.1371/journal.ppat.1008207] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 12/12/2019] [Accepted: 11/12/2019] [Indexed: 12/19/2022] Open
Abstract
Chlamydia trachomatis is a Gram-negative bacterial pathogen and a major cause of sexually transmitted disease and preventable blindness. In women, infections with C. trachomatis may lead to pelvic inflammatory disease (PID), ectopic pregnancy, chronic pelvic pain, and infertility. In addition to infecting the female reproductive tract (FRT), Chlamydia spp. are routinely found in the gastro-intestinal (GI) tract of animals and humans and can be a reservoir for reinfection of the FRT. Whether Chlamydia disseminates from the FRT to the GI tract via internal routes remains unknown. Using mouse-specific C. muridarum as a model pathogen we show that Chlamydia disseminates from the FRT to the GI tract in a stepwise manner, by first infecting the FRT-draining iliac lymph nodes (ILNs), then the spleen, then the GI tract. Tissue CD11c+ DCs mediate the first step: FRT to ILN Chlamydia transport, which relies on CCR7:CCL21/CCL19 signaling. The second step, Chlamydia transport from ILN to the spleen, also relies on cell transport. However, this step is dependent on cell migration mediated by sphingosine 1-phosphate (S1P) signaling. Finally, spleen to GI tract Chlamydia spread is the third critical step, and is significantly hindered in splenectomized mice. Inhibition of Chlamydia dissemination significantly reduces or precludes the induction of Chlamydia-specific serum IgG antibodies, presence of which is correlated with FRT pathology in women. This study reveals important insights in context of Chlamydia spp. pathogenesis and will inform the development of therapeutic targets and vaccines to combat this pathogen. Chlamydia trachomatis is a bacterial pathogen and a major cause of sexually transmitted disease and preventable blindness worldwide. In women, C. trachomatis may cause PID, ectopic pregnancy, chronic pelvic pain, and infertility. Chlamydia spp. are routinely found in the gastro-intestinal (GI) tract of humans and animals. However, whether and how Chlamydia spreads internally to the GI tract following the female reproductive tract (FRT) infection remains unknown. Using a mouse model of infection here we show that Chlamydia spreads to the GI tract in a stepwise manner, by first infecting the FRT-draining iliac lymph nodes (ILNs), then the spleen and the GI tract. Tissue DCs mediate the first step: FRT to ILN Chlamydia spread, which relies on CCR7:CCL21/CCL19 signaling. The second step, ILN to spleen spread, also relies on cell migration, and is dependent on sphingosine 1-phosphate (S1P) signaling. Finally, spleen to GI tract Chlamydia spread is the third critical step and is significantly hindered in splenectomized mice. Our study reveals important insight in context of Chlamydia pathogenesis. In addition, this work will inform the identification of therapeutic targets and development of vaccines against this pathogen.
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Affiliation(s)
- Savannah E. Howe
- School of Biological Sciences, Microbiology Program, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Nita Shillova
- School of Biological Sciences, Microbiology Program, Southern Illinois University, Carbondale, Illinois, United States of America
| | - Vjollca Konjufca
- School of Biological Sciences, Microbiology Program, Southern Illinois University, Carbondale, Illinois, United States of America
- * E-mail:
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43
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Fenton OS, Tibbitt MW, Appel EA, Jhunjhunwala S, Webber MJ, Langer R. Injectable Polymer-Nanoparticle Hydrogels for Local Immune Cell Recruitment. Biomacromolecules 2019; 20:4430-4436. [PMID: 31682423 DOI: 10.1021/acs.biomac.9b01129] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The ability to engineer immune function has transformed modern medicine, highlighted by the success of vaccinations and recent efforts in cancer immunotherapy. Further directions in programming the immune system focus on the design of immunomodulatory biomaterials that can recruit, engage with, and program immune cells locally in vivo. Here, we synthesized shear-thinning and self-healing polymer-nanoparticle (PNP) hydrogels as a tunable and injectable biomaterial platform for local dendritic cell (DC) recruitment. PNP gels were formed from two populations of poly(ethylene glycol)-block-polylactide (PEG-b-PLA) NPs with the same diameter but different PEG brush length (2 or 5 kDa). PEG-b-PLA NPs with the longer PEG brush exhibited improved gel formation following self-assembly and faster recovery after shear-thinning. In all cases, model protein therapeutics were released via Fickian diffusion in vitro, and minor differences in the release rate between the gel formulations were observed. PNP hydrogels were loaded with the DC cytokine CCL21 and injected subcutaneously in a murine model. CCL21-loaded PNP hydrogels recruited DCs preferentially to the site of injection in vivo relative to non-CCL21-loaded hydrogels. Thus, PNP hydrogels comprise a simple and tunable platform biomaterial for in vivo immunomodulation following minimally invasive subcutaneous injection.
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Affiliation(s)
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering , ETH Zürich , Zürich 8092 , Switzerland
| | - Eric A Appel
- Department of Materials Science and Engineering, Department of Bioengineering , Stanford University , Stanford , California 94305 , United States
| | - Siddharth Jhunjhunwala
- Centre for BioSystems Science and Engineering , Indian Institute of Science , Bangalore 560012 , India
| | - Matthew J Webber
- Department of Chemical and Biomolecular Engineering , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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Farnsworth RH, Karnezis T, Maciburko SJ, Mueller SN, Stacker SA. The Interplay Between Lymphatic Vessels and Chemokines. Front Immunol 2019; 10:518. [PMID: 31105685 PMCID: PMC6499173 DOI: 10.3389/fimmu.2019.00518] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 02/26/2019] [Indexed: 12/21/2022] Open
Abstract
Chemokines are a family of small protein cytokines that act as chemoattractants to migrating cells, in particular those of the immune system. They are categorized functionally as either homeostatic, constitutively produced by tissues for basal levels of cell migration, or inflammatory, where they are generated in association with a pathological inflammatory response. While the extravasation of leukocytes via blood vessels is a key step in cells entering the tissues, the lymphatic vessels also serve as a conduit for cells that are recruited and localized through chemoattractant gradients. Furthermore, the growth and remodeling of lymphatic vessels in pathologies is influenced by chemokines and their receptors expressed by lymphatic endothelial cells (LECs) in and around the pathological tissue. In this review we summarize the diverse role played by specific chemokines and their receptors in shaping the interaction of lymphatic vessels, immune cells, and other pathological cell types in physiology and disease.
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Affiliation(s)
- Rae H Farnsworth
- Tumor Angiogenesis and Microenvironment Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia
| | - Tara Karnezis
- Lymphatic and Regenerative Medicine Laboratory, O'Brien Institute Department, St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia
| | - Simon J Maciburko
- Lymphatic and Regenerative Medicine Laboratory, O'Brien Institute Department, St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia
| | - Scott N Mueller
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC, Australia.,The Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Melbourne, VIC, Australia
| | - Steven A Stacker
- Tumor Angiogenesis and Microenvironment Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC, Australia.,Department of Surgery, Royal Melbourne Hospital, The University of Melbourne, Parkville, VIC, Australia
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45
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Wang Z, Wang W, Chai Q, Zhu M. Langerhans Cells Control Lymphatic Vessel Function during Inflammation via LIGHT-LTβR Signaling. THE JOURNAL OF IMMUNOLOGY 2019; 202:2999-3007. [PMID: 30952816 DOI: 10.4049/jimmunol.1801578] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 03/12/2019] [Indexed: 01/03/2023]
Abstract
The lymphatic vasculature is an important route for dendritic cell (DC) or tumor cell migration from peripheral tissues to draining lymph nodes (DLNs). However, the underlying molecular and cellular mechanisms remain poorly understood. In this study, using conventional bone marrow chimeric mice and additional UVB radiation, we found that deficiency of LIGHT but not lymphotoxin (LT) α1β2, likely on radioresistant Langerhans cells (LCs), resulted in impaired skin DC migration to DLNs during LPS-induced inflammation. In addition, LT β receptor (LTβR), but not herpes virus entry mediator, was found to be the receptor of LIGHT controlling DC migration. Furthermore, conditional deficiency of LTβR in Tie2 cre or Lyve1 cre mice, but not in LTβR-deficient bone marrow chimeric mice, impaired DC migration, suggesting an important role of LTβR in radioresistant lymphatic endothelial cells (LECs), although the role of LTβR in blood endothelial cells remains intriguing. Mechanistically, the gene expression of both CCL21 and CCL19 was found to be reduced in skin LECs isolated from LC-LIGHT-conditionally deficient or Lyve1 cre Ltbr fl/fl mice compared with their controls upon LPS stimulation. Soluble recombinant LIGHT was able to upregulate CCL21 and CCL19 gene expression on SVEC4-10 endothelial cells. Doxycycline, an inhibitor of soluble LIGHT release in the inflamed skin, impaired skin CCL21 and CCL19 expression and DC migration. In addition, melanoma cell metastasis to DLNs was also inhibited in LC-LIGHT-conditionally deficient or Lyve1 cre Ltbr fl/fl mice. Together, our data suggest, to our knowledge, a previously unrecognized scenario in which LCs activate LECs via the LIGHT-LTβR signaling axis to promote DC migration or tumor cell metastasis.
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Affiliation(s)
- Zhongnan Wang
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; and.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenjun Wang
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; and.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qian Chai
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; and
| | - Mingzhao Zhu
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; and .,College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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46
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Jackson DG. Leucocyte Trafficking via the Lymphatic Vasculature- Mechanisms and Consequences. Front Immunol 2019; 10:471. [PMID: 30923528 PMCID: PMC6426755 DOI: 10.3389/fimmu.2019.00471] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 02/21/2019] [Indexed: 01/15/2023] Open
Abstract
The lymphatics fulfill a vital physiological function as the conduits through which leucocytes traffic between the tissues and draining lymph nodes for the initiation and modulation of immune responses. However, until recently many of the molecular mechanisms controlling such migration have been unclear. As a result of careful research, it is now apparent that the process is regulated at multiple stages from initial leucocyte entry and intraluminal crawling in peripheral tissue lymphatics, through to leucocyte exit in draining lymph nodes where the migrating cells either participate in immune responses or return to the circulation via efferent lymph. Furthermore, it is increasingly evident that most if not all leucocyte populations migrate in lymph and that such migration is not only important for immune modulation, but also for the timely repair and resolution of tissue inflammation. In this article, I review the latest research findings in these areas, arising from new insights into the distinctive ultrastructure of lymphatic capillaries and lymph node sinuses. Accordingly, I highlight the emerging importance of the leucocyte glycocalyx and its novel interactions with the endothelial receptor LYVE-1, the intricacies of endothelial chemokine secretion and sequestration that direct leucocyte trafficking and the significance of the process for normal immune function and pathology.
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Affiliation(s)
- David G Jackson
- MRC Human Immunology Unit, Radcliffe Department of Medicine, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
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Abstract
PURPOSE OF REVIEW To evaluate role of the lymph node in immune regulation and tolerance in transplantation and recent advances in the delivery of antigen and immune modulatory signals to the lymph node. RECENT FINDINGS Lymph nodes are a primary site of immune cell priming, activation, and modulation, and changes within the lymph node microenvironment have the potential to induce specific regulation, suppression, and potentially tolerance. Antigen enters the lymph node either from tissues via lymphatics, from blood via high endothelial venules, or directly via injection. Here we review different techniques and materials to deliver antigen to the lymph node including microparticles or nanoparticles, ex-vivo antigen presenting cell manipulation, and use of receptor conjugation for specific intralymph node targeting locations. SUMMARY The promising results point to powerful techniques to harness the lymph node microenvironment and direct systemic immune regulation. The materials, techniques, and approaches suggest that translational and clinical trials in nonhuman primate and patients may soon be possible.
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Girbl T, Lenn T, Perez L, Rolas L, Barkaway A, Thiriot A, Del Fresno C, Lynam E, Hub E, Thelen M, Graham G, Alon R, Sancho D, von Andrian UH, Voisin MB, Rot A, Nourshargh S. Distinct Compartmentalization of the Chemokines CXCL1 and CXCL2 and the Atypical Receptor ACKR1 Determine Discrete Stages of Neutrophil Diapedesis. Immunity 2018; 49:1062-1076.e6. [PMID: 30446388 PMCID: PMC6303217 DOI: 10.1016/j.immuni.2018.09.018] [Citation(s) in RCA: 205] [Impact Index Per Article: 34.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 08/13/2018] [Accepted: 09/21/2018] [Indexed: 12/14/2022]
Abstract
Neutrophils require directional cues to navigate through the complex structure of venular walls and into inflamed tissues. Here we applied confocal intravital microscopy to analyze neutrophil emigration in cytokine-stimulated mouse cremaster muscles. We identified differential and non-redundant roles for the chemokines CXCL1 and CXCL2, governed by their distinct cellular sources. CXCL1 was produced mainly by TNF-stimulated endothelial cells (ECs) and pericytes and supported luminal and sub-EC neutrophil crawling. Conversely, neutrophils were the main producers of CXCL2, and this chemokine was critical for correct breaching of endothelial junctions. This pro-migratory activity of CXCL2 depended on the atypical chemokine receptor 1 (ACKR1), which is enriched within endothelial junctions. Transmigrating neutrophils promoted a self-guided migration response through EC junctions, creating a junctional chemokine "depot" in the form of ACKR1-presented CXCL2 that enabled efficient unidirectional luminal-to-abluminal migration. Thus, CXCL1 and CXCL2 act in a sequential manner to guide neutrophils through venular walls as governed by their distinct cellular sources.
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Affiliation(s)
- Tamara Girbl
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Tchern Lenn
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Lorena Perez
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Loïc Rolas
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Anna Barkaway
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Aude Thiriot
- Department of Microbiology and Immunobiology and HMS Center for Immune Imaging, Harvard Medical School, Boston, MA 02115, USA
| | - Carlos Del Fresno
- Immunobiology Laboratory, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid 28029, Spain
| | - Eleanor Lynam
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Elin Hub
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - Marcus Thelen
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Bellinzona 6500, Switzerland
| | - Gerard Graham
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow G12 8TA, UK
| | - Ronen Alon
- Department of Immunology, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - David Sancho
- Immunobiology Laboratory, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid 28029, Spain
| | - Ulrich H von Andrian
- Department of Microbiology and Immunobiology and HMS Center for Immune Imaging, Harvard Medical School, Boston, MA 02115, USA
| | - Mathieu-Benoit Voisin
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK
| | - 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 EC1M 6BQ, UK; Centre for Inflammation and Therapeutic Innovation, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK; Institute for Cardiovascular Prevention, Ludwig-Maximilians University, Munich 80336, Germany
| | - Sussan Nourshargh
- Centre for Microvascular Research, William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK; Centre for Inflammation and Therapeutic Innovation, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, UK.
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49
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Fluorescently Tagged CCL19 and CCL21 to Monitor CCR7 and ACKR4 Functions. Int J Mol Sci 2018; 19:ijms19123876. [PMID: 30518137 PMCID: PMC6321256 DOI: 10.3390/ijms19123876] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/03/2018] [Accepted: 12/03/2018] [Indexed: 01/17/2023] Open
Abstract
Chemokines are essential guidance cues orchestrating cell migration in health and disease. Cognate chemokine receptors sense chemokine gradients over short distances to coordinate directional cell locomotion. The chemokines CCL19 and CCL21 are essential for recruiting CCR7-expressing dendritic cells bearing pathogen-derived antigens and lymphocytes to lymph nodes, where the two cell types meet to launch an adaptive immune response against the invading pathogen. CCR7-expressing cancer cells are also recruited by CCL19 and CCL21 to metastasize in lymphoid organs. In contrast, atypical chemokine receptors (ACKRs) do not transmit signals required for cell locomotion but scavenge chemokines. ACKR4 is crucial for internalizing and degrading CCL19 and CCL21 to establish local gradients, which are sensed by CCR7-expressing cells. Here, we describe the production of fluorescently tagged chemokines by fusing CCL19 and CCL21 to monomeric red fluorescent protein (mRFP). We show that purified CCL19-mRFP and CCL21-mRFP are versatile and powerful tools to study CCR7 and ACKR4 functions, such as receptor trafficking and chemokine scavenging, in a spatiotemporal fashion. We demonstrate that fluorescently tagged CCL19 and CCL21 permit the visualization and quantification of chemokine gradients in real time, while CCR7-expressing leukocytes and cancer cells sense the guidance cues and migrate along the chemokine gradients.
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50
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Yanguas A, Garasa S, Teijeira Á, Aubá C, Melero I, Rouzaut A. ICAM-1-LFA-1 Dependent CD8+ T-Lymphocyte Aggregation in Tumor Tissue Prevents Recirculation to Draining Lymph Nodes. Front Immunol 2018; 9:2084. [PMID: 30258446 PMCID: PMC6143661 DOI: 10.3389/fimmu.2018.02084] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/23/2018] [Indexed: 01/19/2023] Open
Abstract
The quantity of T-lymphocytes reaching the draining lymph nodes from tumors is likely important to mount effective distant responses and for the establishment of long term systemic memory. Looking into mechanisms behind lymphocyte egress, we directed our attention to leukocyte adhesion mechanisms inside tumors. Here we demonstrate that activated T-cells form intra-tumor aggregates in a LFA-1-ICAM-1-dependent fashion in mouse models of melanoma and breast cancer. We also provide evidence of the presence of T-cell clusters in primary human melanoma. Disruption of LFA-1-ICAM-1 interactions, and thereby T-cell clustering, enhances the arrival of activated CD8+ T-cells to tumor draining lymph nodes in both transplanted and spontaneous cancer models. Interestingly, upon ICAM-1 blockade, the expression of the chemotactic receptor CCR7 augments in tumor infiltrating lymphocytes and in in-vitro de-clustered T cells, as well as their ability to transmigrate across lymphatic endothelial cells. We propose that ICAM-1-mediated homotypic T-lymphocyte aggregation may serve as a tumor-mediated immune retention mechanism entrapping activated CD8+ T cells in the tumor microenvironment. Modulation of T-cell adhesion may be of use to improve the transit of activated lymphocytes toward the lymph nodes and their subsequent recirculation.
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Affiliation(s)
- Alba Yanguas
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain
| | - Saray Garasa
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain
| | - Álvaro Teijeira
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain.,Centro de Investigación Biomédica en Red Cáncer, CIBERONC, Madrid Spain
| | - Cristina Aubá
- Department of Plastic and Reconstructive Surgery, Clínica Universidad de Navarra, Pamplona, Spain
| | - Ignacio Melero
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain.,Centro de Investigación Biomédica en Red Cáncer, CIBERONC, Madrid Spain.,Immunology and Immunotherapy Unit, Clínica Universidad de Navarra, Pamplona, Spain
| | - Ana Rouzaut
- Department of Biochemistry and Genetics, University of Navarra, Pamplona, Spain.,Centro de Investigación Biomédica en Red Cáncer, CIBERONC, Madrid Spain
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