1
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Bouma RG, Nijen Twilhaar MK, Brink HJ, Affandi AJ, Mesquita BS, Olesek K, van Dommelen JMA, Heukers R, de Haas AM, Kalay H, Ambrosini M, Metselaar JM, van Rooijen A, Storm G, Oliveira S, van Kooyk Y, den Haan JMM. Nanobody-liposomes as novel cancer vaccine platform to efficiently stimulate T cell immunity. Int J Pharm 2024; 660:124254. [PMID: 38795934 DOI: 10.1016/j.ijpharm.2024.124254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/07/2024] [Accepted: 05/20/2024] [Indexed: 05/28/2024]
Abstract
Cancer vaccines can be utilized in combination with checkpoint inhibitors to optimally stimulate the anti-tumor immune response. Uptake of vaccine antigen by antigen presenting cells (APCs) is a prerequisite for T cell priming, but often relies on non-specific mechanisms. Here, we have developed a novel vaccination strategy consisting of cancer antigen-containing liposomes conjugated with CD169- or DC-SIGN-specific nanobodies (single domain antibodies) to achieve specific uptake by APCs. Our studies demonstrate efficient nanobody liposome uptake by human and murine CD169+ and DC-SIGN+ APCs in vitro and in vivo when compared to control liposomes or liposomes with natural ligands for CD169 and DC-SIGN. Uptake of CD169 nanobody liposomes resulted in increased T cell activation by human APCs and stimulated naive T cell priming in mouse models. In conclusion, while nanobody liposomes have previously been utilized to direct drugs to tumors, here we show that nanobody liposomes can be applied as vaccination strategy that can be extended to other receptors on APCs in order to elicit a potent immune response against tumor antigens.
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Affiliation(s)
- R G Bouma
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - M K Nijen Twilhaar
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - H J Brink
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - A J Affandi
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - B S Mesquita
- Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, Utrecht 3584 CG, the Netherlands
| | - K Olesek
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - J M A van Dommelen
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - R Heukers
- QVQ Holding BV, Yalelaan 1, Utrecht 3584 CL, the Netherlands
| | - A M de Haas
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - H Kalay
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - M Ambrosini
- LIPOSOMA BV, Science Park 408, Amsterdam 1098 XH, the Netherlands
| | - J M Metselaar
- LIPOSOMA BV, Science Park 408, Amsterdam 1098 XH, the Netherlands; Institute for Experimental Molecular Imaging, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - A van Rooijen
- LIPOSOMA BV, Science Park 408, Amsterdam 1098 XH, the Netherlands
| | - G Storm
- Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, Utrecht 3584 CG, the Netherlands; Department of Biomaterials Science and Technology, University of Twente, Enschede 7500 AE, the Netherlands; Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
| | - S Oliveira
- Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, Universiteitsweg 99, Utrecht 3584 CG, the Netherlands; Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, Utrecht 3584 CH, the Netherlands
| | - Y van Kooyk
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands
| | - J M M den Haan
- Department of Molecular Cell Biology and Immunology, Amsterdam UMC Location Vrije Universiteit Amsterdam, De Boelelaan 1117, Amsterdam 1081 HV, the Netherlands; Amsterdam institute for Immunology and Infectious Diseases, Cancer Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Cancer Immunology, Amsterdam, the Netherlands.
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2
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Kashimura M. The human spleen as the center of the blood defense system. Int J Hematol 2020; 112:147-158. [DOI: 10.1007/s12185-020-02912-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 04/29/2020] [Accepted: 05/27/2020] [Indexed: 11/29/2022]
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3
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Abstract
The marginal zone (MZ) is largely composed of a unique subpopulation of B cells, the so-called MZ-B cells. At a molecular level, memory B cells are characterized by the presence of somatically mutated IGV genes. The earliest studies in the rat have documented the presence of hapten-specific MZ-B cells after immunization in the MZ. This work later received experimental support demonstrating that the IGHV-Cµ transcripts expressed by phenotypically defined splenic MZ-B cells (defined as CD90negIgMhighIgDlow B cells) can carry somatic hypermutation. However, only a minor fraction (< 10%-20%) of these MZ-B cells is mutated and is considered to represent memory B cells. Memory B cells can either be class-switched (IgG, IgA, IgE), or non-class-switched (IgM) B cells. B cells in the MZ are a heterogeneous population of cells and both naïve MZ-B cells; class switched and unswitched memory MZ-B cells are present at this unique site in the spleen. Naïve MZ-B cells carry unmutated Ig genes, produce low-affinity IgM molecules and constitute a first line of defense against invading pathogens. Memory MZ-B cells express high-affinity Ig molecules, directed to (microbial) antigens that have been encountered. In this review, we report on the memory compartment of splenic MZ-B cells in the rat to provide insights into the origin and function of these memory MZ-B cells.
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Affiliation(s)
- Jacobus Hendricks
- Discipline of Human Physiology, Westville Campus, University of KwaZulu-Natal, Durban, South Africa.,Department of Rheumatology and Clinical Immunology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Nicolaas A Bos
- Discipline of Human Physiology, Westville Campus, University of KwaZulu-Natal, Durban, South Africa
| | - Frans G M Kroese
- Discipline of Human Physiology, Westville Campus, University of KwaZulu-Natal, Durban, South Africa
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4
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Varga I, Gálfiová P, Blanková A, Konarik M, Báča V, Dvořákova V, Musil V, Turyna R, Klein M. Terminologia Histologica 10 years on: some disputable terms in need of discussion and recent developments. Ann Anat 2019; 226:16-22. [PMID: 31330306 DOI: 10.1016/j.aanat.2019.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 07/06/2019] [Accepted: 07/09/2019] [Indexed: 02/06/2023]
Abstract
At first sight, the issue of morphological terminology may seem to be a "closed and unchanging chapter", as many of the structures within the human body have been known for decades or even centuries. However, the exact opposite is true. The initial knowledge of the microscopic structure of the human body has been continuously broadening thanks to the development of new specialized staining techniques, discovery of the electron microscope, or later application of histochemical and immunohistochemical methods into routine tissue examination. Contrary to popular belief, histology has a status of constantly developing scientific discipline, with continuous influx of new knowledge, resulting in an unavoidable necessity to revise the histological nomenclature at regular intervals. The team of experts of the Federative International Programme on Anatomical Terminology, a working group of the International Federation of Associations of Anatomists, published in 2008 the First Edition of Terminologia Histologica. Terminologia Histologica (TH) is the best and most extensive of all the histological nomenclatures ever issued. However, here we suggest that several terms of important histological structures are still missing while several other terms are disputable. First, we present some clinically important terms of cells and tissue structures for inclusion in the next TH and, in a second part, we refer to some new terms in the current edition of the TH which are not yet mentioned in current histology textbooks (e.g., fusocellular connective tissue, bundle bone as the third type of bone tissue, spongy layer of vagina or arteria vaginata from the splenic white pulp). With this article we hope to start a wide scientific discussion which will lead to an inambiguous definition and demonstration of typical examples of all terms in the TH, with the result that the new edition of the Terminologia Histologica will become an internationally accepted communication tool for all practitioners and teachers of histology alike.
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Affiliation(s)
- Ivan Varga
- Institute of Histology and Embryology, Comenius University in Bratislava, Faculty of Medicine, Špitálska 24, SK-81372 Bratislava, Slovakia.
| | - Paulína Gálfiová
- Institute of Histology and Embryology, Comenius University in Bratislava, Faculty of Medicine, Špitálska 24, SK-81372 Bratislava, Slovakia
| | - Alžbeta Blanková
- Department of Anatomy, Second Faculty of Medicine, Charles University, U Nemocnice 3, 128 00 Praha, Czech Republic
| | - Marek Konarik
- Department of Anatomy, Second Faculty of Medicine, Charles University, U Nemocnice 3, 128 00 Praha, Czech Republic
| | - Václav Báča
- Department of Health Care Studies, College of Polytechnics, Tolstého 16, 586 01 Jihlava, Czech Republic
| | - Vlasta Dvořákova
- Department of Health Care Studies, College of Polytechnics, Tolstého 16, 586 01 Jihlava, Czech Republic
| | - Vladimír Musil
- Centre of Scientific Information, Third Faculty of Medicine, Charles University, Ruská 87, 10000 Prague, Czech Republic; Institute of Information Studies and Librarianship, Faculty of Arts, Charles University, Prague, Czech Republic
| | - Radovan Turyna
- Department of Anatomy, Second Faculty of Medicine, Charles University, U Nemocnice 3, 128 00 Praha, Czech Republic
| | - Martin Klein
- Institute of Histology and Embryology, Comenius University in Bratislava, Faculty of Medicine, Špitálska 24, SK-81372 Bratislava, Slovakia
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5
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Almenar S, Rios-Navarro C, Ortega M, Molina P, Ferrandez-Izquierdo A, Ruiz-Sauri A. Anatomy, immunohistochemistry, and numerical distribution of human splenic microvessels. Ann Anat 2019; 224:161-171. [PMID: 31121286 DOI: 10.1016/j.aanat.2019.05.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/03/2019] [Accepted: 05/06/2019] [Indexed: 11/25/2022]
Abstract
The microvascular architecture of the spleen plays an important role in the immunological function of this organ. The different types of vessels are related to different reticular cells each with their own immunomodulatory functions. The present study describes an immunohistochemical and morphometric analysis of the various types of vessels in 21 human autopsy non-pathological splenic samples. On an area of 785,656.37 μm2 for each sample, we classified and quantified the type and number of vascular structures, each according to their morphology and immunohistochemical profile, and obtained the ratios between them. The distribution of trabecular vessels and the characteristics of the venules are reviewed. In our material the so-called "cavernous perimarginal sinus" (anatomical structure previously described by Schmidt et al., 1988) was observed and interpreted as a curvilinear venule shaped by the follicle in contact with the trabecular vein. Our material comprised 261 trabeculae (containing 269 arterial sections and 508 venous sections), 30,621 CD34+ capillaries, 7739 CD271+ sheathed capillaries, 2588 CD169+ sheathed capillaries, and 31,124 CD8+ sinusoids. The total area (TA) (14,765,714.88 μm2) occupied by the sinusoidal sections of the 21 cases was much higher than the TA of the capillary sections (1,700,269.83 μm2). Similarly, the TA (651,985 μm2) occupied by the sections of the trabecular veins was much higher than the TA of the trabecular arteries (88,594 μm2). The total number of CD34+ capillaries and of sinusoids CD8+ was similar for the sum of the 21 cases, nevertheless there were large differences in each case. Statistically the hypothesis that the number of capillaries and sinusoids are present with the same frequency is discarded. In view of the absence of a numerical correlation between capillaries and sinusoids, we postulate that very possibly the arterial and the venous vascular trees are two anatomically independent structures separated by the splenic cords. We believe that this is the first work where splenic microvascularization is simultaneously approached from a morphometric and immunohistochemical point of view.
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Affiliation(s)
- S Almenar
- Department of Pathology, Faculty of Medicine, Universitat de Valencia, Valencia, Spain
| | | | - M Ortega
- Department of Pathology, Faculty of Medicine, Universitat de Valencia, Valencia, Spain
| | - P Molina
- Department of Pathology, Faculty of Medicine, Universitat de Valencia, Valencia, Spain; Forensic Pathology Service, Institute of Legal Medicine and Forensic Sciences, Valencia, Spain
| | - A Ferrandez-Izquierdo
- Department of Pathology, Faculty of Medicine, Universitat de Valencia, Valencia, Spain; Institute of Health Research INCLIVA, Valencia, Spain
| | - A Ruiz-Sauri
- Department of Pathology, Faculty of Medicine, Universitat de Valencia, Valencia, Spain; Institute of Health Research INCLIVA, Valencia, Spain.
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6
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Tadayon S, Dunkel J, Takeda A, Halle O, Karikoski M, Gerke H, Rantakari P, Virtakoivu R, Pabst O, Salmi M, Hollmén M, Jalkanen S. Clever-1 contributes to lymphocyte entry into the spleen via the red pulp. Sci Immunol 2019; 4:4/33/eaat0297. [DOI: 10.1126/sciimmunol.aat0297] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 11/06/2018] [Accepted: 02/28/2019] [Indexed: 12/19/2022]
Abstract
Lymphocytes recirculate continuously between the blood and lymphoid organs, a process that is of fundamental importance for proper functioning of the immune system. The molecular mechanisms underlying lymphocyte trafficking to the spleen remain an enigma. Here, we show that lymphocytes enter the spleen preferentially from vessels in the red pulp rather than the marginal sinus or the vasculature in the white pulp. Ex vivo adhesion assays in mice and humans, together with genetic ablation of Clever-1 in mice, indicate that CD8+T cell and B220+B cell homing to the spleen via the red pulp is Clever-1 dependent. Moreover, absence of Clever-1 leads to down-regulation of the B cell attractant chemokine, CXCL13, on spleen endothelium. CXCL13 is known to guide B cell trafficking to lymphoid organs, and its lack may contribute to the observed decrease in B cell trafficking into the spleen as well. In summary, this study identifies Clever-1 as an important molecule controlling lymphocyte entry into the spleen, along with a critical role for the splenic red pulp in this regulated trafficking. Furthermore, the results demonstrate that location-specific homing-associated molecules guide lymphocyte entry into the spleen.
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7
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Steiniger BS, Ulrich C, Berthold M, Guthe M, Lobachev O. Capillary networks and follicular marginal zones in human spleens. Three-dimensional models based on immunostained serial sections. PLoS One 2018; 13:e0191019. [PMID: 29420557 PMCID: PMC5805169 DOI: 10.1371/journal.pone.0191019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Accepted: 12/27/2017] [Indexed: 12/21/2022] Open
Abstract
We have reconstructed small parts of capillary networks in the human splenic white pulp using serial sections immunostained for CD34 alone or for CD34 and CD271. The three-dimensional (3D) models show three types of interconnected networks: a network with very few long capillaries inside the white pulp originating from central arteries, a denser network surrounding follicles plus periarterial T-cell regions and a network in the red pulp. Capillaries of the perifollicular network and the red pulp network have open ends. Perifollicular capillaries form an arrangement similar to a basketball net located in the outer marginal zone. The marginal zone is defined by MAdCAM-1+ marginal reticular stromal cells. Perifollicular capillaries are connected to red pulp capillaries surrounded by CD271+ stromal capillary sheath cells. The scarcity of capillaries inside the splenic white pulp is astonishing, as non-polarised germinal centres with proliferating B-cells occur in adult human spleens. We suggest that specialized stromal marginal reticular cells form a barrier inside the splenic marginal zone, which together with the scarcity of capillaries guarantees the maintenance of gradients necessary for positioning of migratory B- and T-lymphocytes in the human splenic white pulp.
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Affiliation(s)
- Birte S. Steiniger
- Institute of Anatomy and Cell Biology, University of Marburg, Marburg, Germany
| | - Christine Ulrich
- Institute of Psychology, University of Marburg, Marburg, Germany
| | - Moritz Berthold
- Institute of Computer Sciences, University of Bayreuth, Bayreuth, Germany
| | - Michael Guthe
- Institute of Computer Sciences, University of Bayreuth, Bayreuth, Germany
| | - Oleg Lobachev
- Institute of Computer Sciences, University of Bayreuth, Bayreuth, Germany
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8
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Emerging Role of the Spleen in the Pharmacokinetics of Monoclonal Antibodies, Nanoparticles and Exosomes. Int J Mol Sci 2017; 18:ijms18061249. [PMID: 28604595 PMCID: PMC5486072 DOI: 10.3390/ijms18061249] [Citation(s) in RCA: 157] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/02/2017] [Accepted: 06/06/2017] [Indexed: 01/19/2023] Open
Abstract
After being absorbed, drugs distribute in the body in part to reach target tissues, in part to be disposed in tissues where they do not exert clinically-relevant effects. Therapeutically-relevant effects are usually terminated by drug metabolism and/or elimination. The role that has been traditionally ascribed to the spleen in these fundamental pharmacokinetic processes was definitely marginal. However, due to its high blood flow and to the characteristics of its microcirculation, this organ would be expected to be significantly exposed to large, new generation drugs that can hardly penetrate in other tissues with tight endothelial barriers. In the present review, we examine the involvement of the spleen in the disposition of monoclonal antibodies, nanoparticles and exosomes and the possible implications for their therapeutic efficacy and toxicity. The data that we will review lead to the conclusion that a new role is emerging for the spleen in the pharmacokinetics of new generation drugs, hence suggesting that this small, neglected organ will certainly deserve stronger attention by pharmacologists in the future.
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9
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Turner VM, Mabbott NA. Influence of ageing on the microarchitecture of the spleen and lymph nodes. Biogerontology 2017; 18:723-738. [PMID: 28501894 PMCID: PMC5597693 DOI: 10.1007/s10522-017-9707-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Accepted: 05/02/2017] [Indexed: 11/24/2022]
Abstract
The elderly have a decreased response to vaccination and an increased susceptibility to infectious diseases. The spleen and lymph nodes are important secondary lymphoid organs where immune cells can rapidly respond to pathogenic material in the blood and lymph in order to mount long-term adaptive immune responses to those pathogens. In aged mice and humans structural changes occur to both the spleen and lymph nodes. These structural changes affect the functioning of the immune cells within, which may ultimate result in less effective or decreased immune responses. This review describes our current understanding of the structural changes that occur to the spleen and lymph nodes of elderly mice. However, where data are available, we also discuss whether similar changes occur in tissues from elderly humans. A particular focus is made on how these structural changes are considered to impact on the functioning of the immune cells within. The world’s population is currently living longer than ever before. The increased incidence and severity of infectious diseases in the elderly has the potential to have a significant impact on the health care system if solutions are not identified. A thorough understanding of the molecular causes of these ageing-related structural changes to the spleen and lymph nodes may help to identify novel treatments that could repair them, and in doing so, improve immune responses and vaccine efficacy in the elderly.
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Affiliation(s)
- Vivian M Turner
- The Roslin Institute and Royal (Dick) School of Veterinary Sciences, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian, EH25 9RG, UK
| | - Neil A Mabbott
- The Roslin Institute and Royal (Dick) School of Veterinary Sciences, University of Edinburgh, Easter Bush Campus, Roslin, Midlothian, EH25 9RG, UK.
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10
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McGaha TL, Karlsson MCI. Apoptotic cell responses in the splenic marginal zone: a paradigm for immunologic reactions to apoptotic antigens with implications for autoimmunity. Immunol Rev 2016; 269:26-43. [PMID: 26683143 DOI: 10.1111/imr.12382] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Apoptotic cells drive innate regulatory responses that result in tolerogenic immunity. This is a critical aspect of cell physiology as apoptotic cells expose potentially dangerous nuclear antigens on the surface in apoptotic blebs, and failure in their recognition, phagocytosis, or destruction can cause dramatic autoimmunity in experimental models and is linked to development and progression of systemic pathology in human. The marginal zone is a specialized splenic environment that serves as a transitional site from circulation to peripheral lymphoid structures. The marginal zone serves a key role in trapping of particulates and initiation of innate responses against systemic microbial pathogens. However in recent years, it has become clear the marginal zone is also important for initiation of immune tolerance to apoptotic cells, driving a coordinated response involving multiple phagocyte and lymphocyte subsets. Recent reports linking defects in splenic macrophage function to systemic lupus erythematosus in a manner analogous to marginal zone macrophages in lupus-prone mice provide an impetus to better understand the mechanistic basis of the apoptotic cell response in the marginal zone and its general applicability to apoptotic cell-driven tolerance at other tissue sites. In this review, we discuss immune responses to apoptotic cells in the spleen in general and the marginal zone in particular, the relationship of these responses to autoimmune disease, and comparisons to apoptotic cell immunity in humans.
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Affiliation(s)
- Tracy L McGaha
- Department of Immunology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.,Princess Margaret Cancer Center, University Health Network, Toronto, ON, Canada
| | - Mikael C I Karlsson
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Stockholm, Sweden
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11
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Lobachev O, Ulrich C, Steiniger BS, Wilhelmi V, Stachniss V, Guthe M. Feature-based multi-resolution registration of immunostained serial sections. Med Image Anal 2016; 35:288-302. [PMID: 27494805 DOI: 10.1016/j.media.2016.07.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 07/03/2016] [Accepted: 07/21/2016] [Indexed: 10/21/2022]
Abstract
The form and exact function of the blood vessel network in some human organs, like spleen and bone marrow, are still open research questions in medicine. In this paper, we propose a method to register the immunohistological stainings of serial sections of spleen and bone marrow specimens to enable the visualization and visual inspection of blood vessels. As these vary much in caliber, from mesoscopic (millimeter-range) to microscopic (few micrometers, comparable to a single erythrocyte), we need to utilize a multi-resolution approach. Our method is fully automatic; it is based on feature detection and sparse matching. We utilize a rigid alignment and then a non-rigid deformation, iteratively dealing with increasingly smaller features. Our tool pipeline can already deal with series of complete scans at extremely high resolution, up to 620 megapixels. The improvement presented increases the range of represented details up to smallest capillaries. This paper provides details on the multi-resolution non-rigid registration approach we use. Our application is novel in the way the alignment and subsequent deformations are computed (using features, i.e. "sparse"). The deformations are based on all images in the stack ("global"). We also present volume renderings and a 3D reconstruction of the vascular network in human spleen and bone marrow on a level not possible before. Our registration makes easy tracking of even smallest blood vessels possible, thus granting experts a better comprehension. A quantitative evaluation of our method and related state of the art approaches with seven different quality measures shows the efficiency of our method. We also provide z-profiles and enlarged volume renderings from three different registrations for visual inspection.
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Affiliation(s)
- Oleg Lobachev
- Visual Computing of University Bayreuth, 95440 Bayreuth, Germany.
| | - Christine Ulrich
- Psychology of Philipps-University Marburg, 35037 Marburg, Germany
| | - Birte S Steiniger
- Institute of Anatomy and Cell Biology of Philipps-University Marburg 35037 Marburg, Germany
| | - Verena Wilhelmi
- Institute of Anatomy and Cell Biology of Philipps-University Marburg 35037 Marburg, Germany
| | - Vitus Stachniss
- Restorative Dentistry and Endodontics of Philipps-University Marburg, 35037 Marburg, Germany
| | - Michael Guthe
- Visual Computing of University Bayreuth, 95440 Bayreuth, Germany
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