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  • 1
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    Identification of splenic reservoir monocytes and their deployment to inflammatory sites (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-01
    Description: A current paradigm states that monocytes circulate freely and patrol blood vessels but differentiate irreversibly into dendritic cells (DCs) or macrophages upon tissue entry. Here we show that bona fide undifferentiated monocytes reside in the spleen and outnumber their equivalents in circulation. The reservoir monocytes assemble in clusters in the cords of the subcapsular red pulp and are distinct from macrophages and DCs. In response to ischemic myocardial injury, splenic monocytes increase their motility, exit the spleen en masse, accumulate in injured tissue, and participate in wound healing. These observations uncover a role for the spleen as a site for storage and rapid deployment of monocytes and identify splenic monocytes as a resource that the body exploits to regulate inflammation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2803111/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2803111/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Swirski, Filip K -- Nahrendorf, Matthias -- Etzrodt, Martin -- Wildgruber, Moritz -- Cortez-Retamozo, Virna -- Panizzi, Peter -- Figueiredo, Jose-Luiz -- Kohler, Rainer H -- Chudnovskiy, Aleksey -- Waterman, Peter -- Aikawa, Elena -- Mempel, Thorsten R -- Libby, Peter -- Weissleder, Ralph -- Pittet, Mikael J -- 1R01HL095612/HL/NHLBI NIH HHS/ -- P01 A154904/PHS HHS/ -- P01 AI054904/AI/NIAID NIH HHS/ -- P01 AI054904-010001/AI/NIAID NIH HHS/ -- P50 CA086355/CA/NCI NIH HHS/ -- P50 CA086355-07/CA/NCI NIH HHS/ -- P50 CA86355/CA/NCI NIH HHS/ -- R00 HL094533/HL/NHLBI NIH HHS/ -- R01 HL095629/HL/NHLBI NIH HHS/ -- R01 HL096576/HL/NHLBI NIH HHS/ -- R24 CA69246/CA/NCI NIH HHS/ -- U01 HL080731/HL/NHLBI NIH HHS/ -- U01 HL080731-05/HL/NHLBI NIH HHS/ -- U54 CA126515/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2009 Jul 31;325(5940):612-6. doi: 10.1126/science.1175202.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. fswirski@mgh.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19644120" target="_blank"〉PubMed〈/a〉
    Keywords: Angiotensin II/blood/pharmacology ; Animals ; Antigens, Ly/metabolism ; Bone Marrow Cells/physiology ; Cell Differentiation ; Cell Movement ; Cell Size ; Female ; Inflammation/*pathology ; Mice ; Mice, Inbred C57BL ; Monocytes/cytology/*physiology ; Myocardial Infarction/immunology/*pathology/*physiopathology ; Myocardium/*immunology/*pathology ; Rats ; Rats, Wistar ; Receptors, Angiotensin/metabolism ; Spleen/cytology/*immunology ; Splenectomy
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    HIV-infected T cells are migratory vehicles for viral dissemination (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-08-03
    Description: After host entry through mucosal surfaces, human immunodeficiency virus-1 (HIV-1) disseminates to lymphoid tissues to establish a generalized infection of the immune system. The mechanisms by which this virus spreads among permissive target cells locally during the early stages of transmission and systemically during subsequent dissemination are not known. In vitro studies suggest that the formation of virological synapses during stable contacts between infected and uninfected T cells greatly increases the efficiency of viral transfer. It is unclear, however, whether T-cell contacts are sufficiently stable in vivo to allow for functional synapse formation under the conditions of perpetual cell motility in epithelial and lymphoid tissues. Here, using multiphoton intravital microscopy, we examine the dynamic behaviour of HIV-infected T cells in the lymph nodes of humanized mice. We find that most productively infected T cells migrate robustly, resulting in their even distribution throughout the lymph node cortex. A subset of infected cells formed multinucleated syncytia through HIV envelope-dependent cell fusion. Both uncoordinated motility of syncytia and adhesion to CD4(+) lymph node cells led to the formation of long membrane tethers, increasing cell lengths to up to ten times that of migrating uninfected T cells. Blocking the egress of migratory T cells from the lymph nodes into efferent lymph vessels, and thus interrupting T-cell recirculation, limited HIV dissemination and strongly reduced plasma viraemia. Thus, we have found that HIV-infected T cells are motile, form syncytia and establish tethering interactions that may facilitate cell-to-cell transmission through virological synapses. Migration of T cells in lymph nodes therefore spreads infection locally, whereas their recirculation through tissues is important for efficient systemic viral spread, suggesting new molecular targets to antagonize HIV infection.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470742/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3470742/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Murooka, Thomas T -- Deruaz, Maud -- Marangoni, Francesco -- Vrbanac, Vladimir D -- Seung, Edward -- von Andrian, Ulrich H -- Tager, Andrew M -- Luster, Andrew D -- Mempel, Thorsten R -- P01 AI0178897/AI/NIAID NIH HHS/ -- P30 AI060354/AI/NIAID NIH HHS/ -- P30 AR042689/AR/NIAMS NIH HHS/ -- P30 DK043351/DK/NIDDK NIH HHS/ -- P30AI060354/AI/NIAID NIH HHS/ -- R01 CA150975/CA/NCI NIH HHS/ -- R56 AI097052/AI/NIAID NIH HHS/ -- T32 AI007387/AI/NIAID NIH HHS/ -- England -- Nature. 2012 Oct 11;490(7419):283-7. doi: 10.1038/nature11398. Epub 2012 Aug 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22854780" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CD4-Positive T-Lymphocytes/*virology ; Cell Movement ; Cells, Cultured ; Disease Models, Animal ; Female ; Giant Cells ; HIV/*immunology ; HIV Infections/*immunology/transmission/*virology ; Humans ; Lymph Nodes/virology ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Mice, Transgenic
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    Retroviruses use CD169-mediated trans-infection of permissive lymphocytes to establish infection (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-10-03
    Description: Dendritic cells can capture and transfer retroviruses in vitro across synaptic cell-cell contacts to uninfected cells, a process called trans-infection. Whether trans-infection contributes to retroviral spread in vivo remains unknown. Here, we visualize how retroviruses disseminate in secondary lymphoid tissues of living mice. We demonstrate that murine leukemia virus (MLV) and human immunodeficiency virus (HIV) are first captured by sinus-lining macrophages. CD169/Siglec-1, an I-type lectin that recognizes gangliosides, captures the virus. MLV-laden macrophages then form long-lived synaptic contacts to trans-infect B-1 cells. Infected B-1 cells subsequently migrate into the lymph node to spread the infection through virological synapses. Robust infection in lymph nodes and spleen requires CD169, suggesting that a combination of fluid-based movement followed by CD169-dependent trans-infection can contribute to viral spread.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4651917/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4651917/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sewald, Xaver -- Ladinsky, Mark S -- Uchil, Pradeep D -- Beloor, Jagadish -- Pi, Ruoxi -- Herrmann, Christin -- Motamedi, Nasim -- Murooka, Thomas T -- Brehm, Michael A -- Greiner, Dale L -- Shultz, Leonard D -- Mempel, Thorsten R -- Bjorkman, Pamela J -- Kumar, Priti -- Mothes, Walther -- P01 AI078897/AI/NIAID NIH HHS/ -- P30 CA016359/CA/NCI NIH HHS/ -- P50 GM082545/GM/NIGMS NIH HHS/ -- P50GM082545/GM/NIGMS NIH HHS/ -- R01 AI097052/AI/NIAID NIH HHS/ -- R01 AI112443/AI/NIAID NIH HHS/ -- R01 CA098727/CA/NCI NIH HHS/ -- R01 DA036298/DA/NIDA NIH HHS/ -- S10 RR026697/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2015 Oct 30;350(6260):563-7. doi: 10.1126/science.aab2749. Epub 2015 Oct 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT 06510, USA. sewald@mvp.uni-muenchen.de priti.kumar@yale.edu walther.mothes@yale.edu. ; Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA. ; Department of Microbial Pathogenesis, Yale University School of Medicine, New Haven, CT 06510, USA. ; Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06510, USA. ; Department of Genetics, Yale University School of Medicine, New Haven, CT 06510, USA. ; Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA. ; Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01655, USA. ; The Jackson Laboratory, Bar Harbor, ME 04609, USA. ; Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06510, USA. sewald@mvp.uni-muenchen.de priti.kumar@yale.edu walther.mothes@yale.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26429886" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dendritic Cells/immunology/virology ; HIV Infections/*immunology ; HIV-1/*physiology ; Humans ; Leukemia Virus, Murine/*physiology ; Lymph Nodes/immunology/virology ; Lymphocytes/immunology/*virology ; Macrophages/immunology/virology ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Retroviridae Infections/*immunology ; Sialic Acid Binding Ig-like Lectin 1/genetics/*physiology ; Spleen/immunology/virology ; *Virus Internalization
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    SCS macrophages suppress melanoma by restricting tumor-derived vesicle-B cell interactions (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-03-19
    Description: Tumor-derived extracellular vesicles (tEVs) are important signals in tumor-host cell communication, yet it remains unclear how endogenously produced tEVs affect the host in different areas of the body. We combined imaging and genetic analysis to track melanoma-derived vesicles at organismal, cellular, and molecular scales to show that endogenous tEVs efficiently disseminate via lymphatics and preferentially bind subcapsular sinus (SCS) CD169(+) macrophages in tumor-draining lymph nodes (tdLNs) in mice and humans. The CD169(+) macrophage layer physically blocks tEV dissemination but is undermined during tumor progression and by therapeutic agents. A disrupted SCS macrophage barrier enables tEVs to enter the lymph node cortex, interact with B cells, and foster tumor-promoting humoral immunity. Thus, CD169(+) macrophages may act as tumor suppressors by containing tEV spread and ensuing cancer-enhancing immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pucci, Ferdinando -- Garris, Christopher -- Lai, Charles P -- Newton, Andita -- Pfirschke, Christina -- Engblom, Camilla -- Alvarez, David -- Sprachman, Melissa -- Evavold, Charles -- Magnuson, Angela -- von Andrian, Ulrich H -- Glatz, Katharina -- Breakefield, Xandra O -- Mempel, Thorsten R -- Weissleder, Ralph -- Pittet, Mikael J -- 1R01CA164448/CA/NCI NIH HHS/ -- 1R33CA202064/CA/NCI NIH HHS/ -- F31-CA196035/CA/NCI NIH HHS/ -- P01-CA069246/CA/NCI NIH HHS/ -- P50-CA86355/CA/NCI NIH HHS/ -- R01 AI097052/AI/NIAID NIH HHS/ -- R01-AI084880/AI/NIAID NIH HHS/ -- R01EB010011/EB/NIBIB NIH HHS/ -- R21-CA190344/CA/NCI NIH HHS/ -- T32CA79443/CA/NCI NIH HHS/ -- U19 CA179563/CA/NCI NIH HHS/ -- U54-CA126515/CA/NCI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- New York, N.Y. -- Science. 2016 Apr 8;352(6282):242-6. doi: 10.1126/science.aaf1328. Epub 2016 Mar 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Systems Biology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA. ; Center for Systems Biology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA. Graduate Program in Immunology, Harvard Medical School, Boston, MA 02115, USA. ; Department of Neurology, Massachusetts General Hospital Research Institute, Harvard Medical School, Charlestown, MA 02129, USA. ; Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA. ; Institute of Pathology, University Hospital Basel, 4031 Basel, Switzerland. ; Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital Research Institute, Harvard Medical School, Charlestown, MA 02129, USA. ; Center for Systems Biology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, MA 02114, USA. mpittet@mgh.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26989197" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/*immunology/ultrastructure ; Cell Communication ; Extracellular Vesicles/*immunology ; Humans ; *Immune Tolerance ; Lymph Nodes/immunology ; Lymphatic Vessels/immunology ; Macrophages/chemistry/*immunology ; Melanoma/*immunology/pathology ; Melanoma, Experimental/immunology/pathology ; Mice ; Mice, Inbred C57BL ; Sialic Acid Binding Ig-like Lectin 1/analysis/immunology ; Skin Neoplasms/*immunology/pathology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    Immunology: In the right place at the right time (2015)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2015-11-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Carrizosa, Esteban -- Mempel, Thorsten R -- England -- Nature. 2015 Dec 10;528(7581):205-6. doi: 10.1038/nature16312. Epub 2015 Nov 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Harvard Medical School and the Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26605531" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    Specific and covalent labeling of a membrane protein with organic fluorochromes and quantum dots (2007)
    National Academy of Sciences
    Details
    Publication Date: 2007-09-04
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 7
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    Uncoupling CD21 and CD19 of the B-cell coreceptor (2009)
    National Academy of Sciences
    Details
    Publication Date: 2009-08-12
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 8
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    S1PR1 controls effector T-cell egress [Immunology and Inflammation] (2016)
    National Academy of Sciences
    Details
    Publication Date: 2016-02-24
    Description: Viral clearance requires effector T-cell egress from the draining lymph node (dLN). The mechanisms that regulate the complex process of effector T-cell egress from the dLN after infection are poorly understood. Here, we visualized endogenous pathogen-specific effector T-cell migration within, and from, the dLN. We used an inducible mouse model...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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