DOCSLIB.ORG

Early Life Microbiota, Neonatal Immune Maturation and Hematopoiesis

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Early Life Microbiota, Neonatal Immune Maturation and Hematopoiesis THE NATIONAL FOOD INSTITUTE TECHNICAL UNIVERSITY OF DENMARK PhD thesis Matilde Bylov Kristensen Early Life Microbiota, Neonatal Immune Maturation and Hematopoiesis Submitted: 11.03.2014 Early life microbiota, neonatal immune maturation and hematopoiesis PhD thesis · 2014 Matilde Bylov Kristensen Institute: The National Food Institute Name of department: Department of Food Microbiology Author: Matilde Bylov Kristensen Title: Early Life Microbiota, Neonatal Immune Maturation and Hematopoiesis Academic advisors: Professor Tine Rask Licht, Technical University of Denmark Professor Hanne Frøkiær, University of Copenhagen Submitted: 11.03.2014 Front-page figure: Histology, hematoxylin and eosin (H&E) staining, of tissue sections of murine spleens isolated the day after birth. Liver from a germfree neonate mouse (Left) and liver from a CONV neonate mouse (Right) showing notably less hematopoietic clusters (tissue with groups of cells with darkly stained nuclei) in the liver on the right, from the conventionally colonized mouse. 10x magnification. PREFACE This thesis is submitted to the Technical University of Denmark to obtain the PhD degree. The work presented has been carried out in two groups; The first part at Department of Food Microbiology at The National Food Institute, Technical University of Denmark under supervision of Professor Tine Rask Licht, and the last part in Molecular Immunology Group at Department of Veterinary Disease Biology, Section of Experimental Animal Models, Faculty of Health and Medical Sciences, University of Copenhagen under supervision of Professor Hanne Frøkiær. All animals were housed and bred at The National Food Institute. Experimental procedures on animals and tissues as well as some cellular analyses were carried out here. All immunologic assays, microscopic analyses and the rest of the cellular analyses were carried out at the Faculty of Health and Medical Sciences at University of Copenhagen. This study was supported by ‘globalization funds’ given as a grant to Professor Tine Rask Licht and Professor Hanne Frøkiær in 2007. 1 ACKNOWLEDGEMENTS Present thesis was never completed without the help and encouragements from so many skilled and great people. Most importantly, I want to thank both my supervisors: Professor Hanne Frøkiær for invaluable scientific guiding and constant inspiration, patience and encouragement. I am grateful for the time I have had in your fantastic group. Professor Tine Rask Licht thanks for listening and guiding me through this work, and for your effort, advices and flexibility that made it possible for me to finish this work. I also want to express my gratitude for the skilled scientists, I have had the pleasure to work with during my PhD years; Stine Broeng Metzdorff, Lisbeth Nielsen Fink, Louise Hjerrild Zeuthen and Anders Bergström. Thank you for the inspiration, effort and collaboration. Anni Mehlsen and Marianne Petersen, thank you for your skilled help and fantastic company! I am further very grateful for the technical help from Heidi Letting and Bodil Madsen at DTU FOOD, and for the great help and communication from Maja Danielsen and Anne Ørngreen, and their fellow co-workers in the stable at DTU FOOD, during the first years of my PhD. Thank you for your immense patience with the troubled breeding of germfree mice. Working in two different groups has given me the opportunity to work with many inspiring and skilled PhD students, masterstudents and Post-docs; Anne Petersen, Tine Ebersbach, Louise Kristine Vigsnæs and Lene Hemmingsen, thank you for the great time we had together in our basement office at DTU FOOD. Dina Silke Malling Damlund, Louise Hemmingsen, Lisbeth Drodz Lund, Eva Fuglsang, Rasmus Baadsgaard Mærkedahl, Gudrun Weiss, Kristina Maetoft Udsen and Ronja Mathiesen thanks for a great time at KU and for sharing the ‘tough months and the fantastic days’ with me. Additionally I had the pleasure to supervise the master students Christina Kjærgaard and Line Rieck Schmidt during their work at DTU FOOD. I hope you had a good time too. I also want to thank Professor Fredrik Bäckhed and technician Anna Hállen for valuable help with the germfree mice during my stay at Sahlgrenska Academia, University of Gothenburg in October 2010, and Erwin L. Roggen for giving a very important scientific advice in late 2012 that turned the present work upside down. Lastly, I want to thank my dear family, especially Sinus, Magnus, Jens and Anna, Mor and Far. Your love and care have been the most important factors through all the years. Matilde, March 2014 2 DANSK RESUMÉ Epidemiologiske data støtter i tiltagende grad hypotesen om at mikrobiotaen hos det nyfødte barn spiller en vigtig rolle i udviklingen af et balanceret immunsystem. Forhold tidligt i livet, som fødselsmåde og spædbarnets ernæring, har vist sig at have indflydelse på udviklingen af immunrelaterede sygdomme senere i livet. Sygdomme som diabetes, astma og inflammatoriske tarmsygdomme er relateret til den tidlige kolonisering af tarmen. Tarmepitelet udgør en fysisk og kemisk barriere mellem bakterierne i tarm lumen og immuncellerne i det submukosale væv. Tarmens epitelceller danner en meget stort mono-lags overflade og er af stor betydning for den synergistiske sameksistens mellem milliarder af bakterier i tarmen og deres mammale vært. Tarmens epitel celler kommunikerer aktivt med bakterierne i tarmen, og denne sameksistens er med til at etablere en nyttig tolerancetilstand i tarmen. Tarmens homeostase fremmes af en balanceret og kontrolleret kommunikation mellem tarmcellerne og de kommensale bakterier i tarmen. Hematopoietiske stamceller fra den føtale lever distribueres via blodet til den føtale/neonatale milt og marv i den perinatale fase. I spædbørn og nyfødte mus beskrives en markant øgning af granulære celler i blodet i de første dage efter fødsel. Dette er en naturlig del af den neonatale hematopoiese. Tilstedeværelse af granulære myeloide suppressor celler i humant navlestrengsblod er beskrevet i en helt ny artikel. Disse granulære suppressor celler er tidligere beskrevet i forbindelse med cancer, inflammation og under sepsis. De dannes i forbindelse med den myeloide hematopoiese og flere nyligt beskrevne studier viser en immunregulerende rolle for disse celler i den nyfødte. I nærværende studie viste vi tilstedeværelsen af en dominerende gruppe af CD11b+Gr-1+ celler in den nyfødte musemilt. Tilstedeværelse af disse celler var mikrobiota afhængig, idet kimfrie mus havde markant færre af disse celler i milten i den første leveuge. Mikroskopidata indikerede at disse celler stammede fra hematopoietisk væv i den nyfødte mus, og at mobilisering og aktivering af dette væv blev fremmet af en konventionel kolonisering af tarmen. Regulering af tarmens barriere var påvirket af mikrobiotaen, idet ekspressionsstudier af tight junction protein gener viste en hurtigere og strammere regulering af disse gener i nyfødte mus med en konventionel mikrobiota end i den kimfrie mus. Den komplekse mikrobiota fremmer desuden ekspression af gener involveret i mucin sekretion, TLR signalering og cytokin produktion i tarmen, mens den nedregulerer gener for chemokin ekspression samme sted. Ny viden indikerer at den dominerende CD11b+Gr-1+ cellegruppe kan være immunregulerende celler af betydning for den tidlige etablering af tolerance i den nyfødte, men det er ikke bevist i dette studie. 3 ABSTRACT Emerging epidemiologic data supports the hypothesis that early life colonization is a key player in development of a balanced immune system. Events in early life, as birth mode and infant diet, are shown to influence development of immune related diseases, like asthma, diabetes and inflammatory bowl disease, later in life. The intestinal epithelium makes up a physical and biochemical barrier between the bacteria in the gut lumen and the immune cells in the submocusal tissue. This monolayer of intestinal epithelial cells (IEC) makes up an extremely large surface and is highly important for the synergistic coexistence between trillions of bacteria in the gastrointestinal tract and their mammalian hosts. The IEC actively communicate with the microbiota of the gut lumen and tolerance establishment in the intestine is induced as a result of a balanced and controlled communication between IEC and the commensals in the gut. Hematopoietic stem cells from the fetal liver seed the fetal spleen and bone marrow in perinatal phase. Granulocytosis in neonate mice and man just after birth is a natural event of early life hematopoiesis and likely contributes to elevated counts of neutrophil-like cells in the peripheral blood of newborns. Granular myeloid derived suppressor cells (MDSC) have recently been described in human cord blood. MDSC are potential immunosuppressive cells often described in cancer, inflammation and during sepsis. They evolve from immature myeloid cells during hematopoiesis. Several recent studies show a role for various myeloid derived and immune suppressive cellular subsets in the newborn. In the present work we showed the presence of a prominent group of CD11b+Gr-1+ cells in the neonate murine spleen. The presence of these cells were dependent on the colonizing microbiota, as germfree neonate mice held notably fewer of these cells in the spleen. Microscopy of spleens and livers indicated that these cells derived from hematopoietic tissue in the liver of the neonate mouse, and that mobilization and activation of the hematopoietic tissue is promoted by the presence of colonizing microbes. The regulation of epithelial barrier integrity
Load more

Recommended publications
  • CD169+ Macrophages Take the Bullet
    nEWs and ViEWs 1. Fazilleau, N. et al. Immunity 30, 324–335 could sustain the presence of NKTFH cell– assessed mainly for their ability to induce strong (2009). dependent germinal centers. T helper type 1 or 2 or tolerogenic immune 2. Nutt, S.L. et al. Nat. Immunol. 12, 472–477 The new insights gained from these studies responses according to the therapeutic objec- (2011). could lead to the design of complex antigen for- tives. It will be important to assess the effect 3. Galli, G. et al. Proc. Natl. Acad. Sci. USA 104, 3984–3989 (2007). mulations that combine lipid-protein antigen of iNKT cell agonists on inducing IL-21 pro- 4. Chang, P. et al. Nat. Immunol. 13, 35–43 (2012). with T cell epitopes to prime not only B cells duction by iNKT cells to promote not only 5. King, I. et al. Nat. Immunol. 13, 44–50 (2012). 6. Cerundolo, V. et al. Nat. Rev. Immunol. 9, 28–38 but also T cells. This strategy would boost not B cell help but also a different spectrum of (2009). only iNKT cells but also conventional T cell cytokines such as IL-4 or interferon-γ, which 7. Tupin, E. et al. Nat. Rev. Microbiol. 5, 405–417 responses through the activation of dendritic are known to drive isotype switching to (2007). 8. Diana, J. et al. Eur. J. Immunol. 39, 3283–3291 cells. This strategy would combine the antigen- IgG1 and IgG2a, respectively. Modifying the (2009). specific iNKT cell cognate help provided to lipid covalently coupled to protein antigen 9.
    [Show full text]
  • Eosinophil Extracellular Traps and Inflammatory Pathologies—Untangling the Web!
    REVIEW published: 26 November 2018 doi: 10.3389/fimmu.2018.02763 Eosinophil Extracellular Traps and Inflammatory Pathologies—Untangling the Web! Manali Mukherjee 1*, Paige Lacy 2 and Shigeharu Ueki 3 1 Department of Medicine, McMaster University and St Joseph’s Healthcare, Hamilton, ON, Canada, 2 Department of Medicine, Alberta Respiratory Centre, University of Alberta, Edmonton, AB, Canada, 3 Department of General Internal Medicine and Clinical Laboratory Medicine, Akita University Graduate School of Medicine, Akita, Japan Eosinophils are an enigmatic white blood cell, whose immune functions are still under intense investigation. Classically, the eosinophil was considered to fulfill a protective role against parasitic infections, primarily large multicellular helminths. Although eosinophils are predominantly associated with parasite infections, evidence of a role for eosinophils in mediating immunity against bacterial, viral, and fungal infections has been recently reported. Among the mechanisms by which eosinophils are proposed to exert their protective effects is the production of DNA-based extracellular traps (ETs). Remarkably, Edited by: DNA serves a role that extends beyond its biochemical function in encoding RNA and Moncef Zouali, protein sequences; it is also a highly effective substance for entrapment of bacteria Institut National de la Santé et de la and other extracellular pathogens, and serves as valuable scaffolding for antimicrobial Recherche Médicale (INSERM), France mediators such as granule proteins from immune cells. Extracellular
    [Show full text]
  • Of T Cell Tolerance
    cells Review Strength and Numbers: The Role of Affinity and Avidity in the ‘Quality’ of T Cell Tolerance Sébastien This 1,2,† , Stefanie F. Valbon 1,2,†, Marie-Ève Lebel 1 and Heather J. Melichar 1,3,* 1 Centre de Recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada; [email protected] (S.T.); [email protected] (S.F.V.); [email protected] (M.-È.L.) 2 Département de Microbiologie, Immunologie et Infectiologie, Université de Montréal, Montréal, QC H3C 3J7, Canada 3 Département de Médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada * Correspondence: [email protected] † These authors contributed equally to this work. Abstract: The ability of T cells to identify foreign antigens and mount an efficient immune response while limiting activation upon recognition of self and self-associated peptides is critical. Multiple tolerance mechanisms work in concert to prevent the generation and activation of self-reactive T cells. T cell tolerance is tightly regulated, as defects in these processes can lead to devastating disease; a wide variety of autoimmune diseases and, more recently, adverse immune-related events associated with checkpoint blockade immunotherapy have been linked to a breakdown in T cell tolerance. The quantity and quality of antigen receptor signaling depend on a variety of parameters that include T cell receptor affinity and avidity for peptide. Autoreactive T cell fate choices (e.g., deletion, anergy, regulatory T cell development) are highly dependent on the strength of T cell receptor interactions with self-peptide. However, less is known about how differences in the strength Citation: This, S.; Valbon, S.F.; Lebel, of T cell receptor signaling during differentiation influences the ‘function’ and persistence of anergic M.-È.; Melichar, H.J.
    [Show full text]
  • Primary Splenic and Nodal Marginal Zone Lymphoma
    J. Clin. Exp. Hematopathol Vol. 45, No. 1, Aug 2005 Review Article Primary Splenic and Nodal Marginal Zone Lymphoma: Jacques Diebold, Agne`s Le Tourneau, Eva Comperat, Thierry Molina and Jose´ e Audouin Primary splenic and nodal marginal zone (MZ) lymphomas are rare small B cell lymphomas presenting with similar histopathologic features. The neoplastic cell population mostly consists of monocytoid B cells organized in a MZ pattern, associated with centrocytoid cells colonizing follicles. About 50% of cases have a monotypic plasma cell component. The different histopathologic patterns and differential diagnosis are discussed here. Both diseases share a similar immunophenotype, with the expression of B-cell associated antigens and restriction of immunoglobulin light chain. The only difference is the more frequent expression of IgD in splenic than in nodal lymphomas. The most recent findings in genetics and molecular biology are presented and discussed. The main clinical and biological symptoms are described and the similarity of some cases with Waldenstro¨ms macroglobulinemia is stressed. Both lymphomas present with the same type of bone marrow involvement with a high frequency of intravascular infiltrates, which can be associated with interstitial and nodular infiltrates. Transformation into diffuse large B cell lymphoma occurs in about 10 to 15% of the cases. The outcome in many splenic MZ lymphomas is characterized by a lengthy survival after splenectomy (9 to 13 years or longer), despite the absence of a consensus on the optimal treatment. Nodal MZ lymphoma has a more aggressive evolution and seems to only be curable at an early stage. Further studies are needed of both lymphomas to improve treatment and prognosis.
    [Show full text]
  • Essential Requirement for Nicastrin in Marginal Zone and B-1 B Cell Development
    Essential requirement for nicastrin in marginal zone and B-1 B cell development Jin Huk Choia,b,1,2, Jonghee Hanc,1, Panayotis C. Theodoropoulosa,d, Xue Zhonga, Jianhui Wanga, Dawson Medlera, Sara Ludwiga, Xiaoming Zhana, Xiaohong Lia, Miao Tanga, Thomas Gallaghera, Gang Yuc, and Bruce Beutlera,2 aCenter for the Genetics of Host Defense, University of Texas Southwestern Medical Center, Dallas, TX 75390; bDepartment of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390; cDepartment of Neuroscience, Peter O’Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390; and dDepartment of Internal Medicine, Physician Scientist Training Program, Washington University in St. Louis, Barnes Jewish Hospital, St. Louis, MO 63110 Contributed by Bruce Beutler, January 7, 2020 (sent for review September 24, 2019; reviewed by Douglas J. Hilton and Ellen V. Rothenberg) γ-secretase is an intramembrane protease complex that catalyzes peritoneal cavity, and are maintained by self-renewal throughout the proteolytic cleavage of amyloid precursor protein and Notch. the life of the organism (10). It is well established that the spleen is Impaired γ-secretase function is associated with the development also required for B-1 (especially B-1a) cell development (11); of Alzheimer’s disease and familial acne inversa in humans. In a however, the underlying mechanism(s) that mediate B-1 cell dif- forward genetic screen of mice with N-ethyl-N-nitrosourea-induced ferentiation remain largely unknown. mutations for defects in adaptive immunity, we identified animals The γ-secretase protease complex cleaves multiple type I mem- within a single pedigree exhibiting both hypopigmentation of brane proteins, including amyloid precursor protein (APP) and the fur and diminished T cell-independent (TI) antibody responses.
    [Show full text]
  • Tolerance to Allergens: How It Develops and How It Can Be Induced
    Session 2101 Plenary: Immunotherapy: Mechanism, Outcomes and Markers Tolerance to Allergens: How it Develops and How it Can be Induced Cezmi A. Akdis, MD Swiss Institute of Allergy and Asthma Research (SIAF), University of Zurich, Davos, Switzerland Corresponding author: Cezmi A. Akdis, MD Swiss Institute of Allergy and Asthma Research (SIAF), University of Zurich, Davos Address E-mail: [email protected] Tel.: + 41 81 4100848 Fax: + 41 81 4100840 Acknowledgments: The authors' laboratories are supported by the Swiss National Foundation grant 320030_132899 and Christine Kühne Center for Allergy Research and Education (CK-CARE). ABSTRACT The induction of immune tolerance and specific immune suppression are essential processes in the control of immune responses. Allergen immunotherapy induces early desensitization and peripheral T cell tolerance to allergens associated with development of Treg and Breg cells, and downregulation of several allergic and inflammatory aspects of effector subsets of T cells, B cells, basophils, mast cells and eosinophils. Similar molecular and cellular mechanisms have been observed in subcutaneous and sublingual AIT as well as natural tolerance to high doses of allergen exposure. In allergic disease, the balance between allergen-specific Treg and disease-promoting T helper 2 cells (Th2) appears to be decisive in the development of an allergic versus a non-disease promoting or “healthy” immune response against allergen. Treg specific for common environmental allergens represent the dominant subset in healthy individuals arguing for a state of natural tolerance to allergen in these individuals. In contrast, there is a high frequency of allergen-specific Th2 cells in allergic individuals. Treg function appears to be impaired in active allergic disease.
    [Show full text]
  • Regulation of Eosinophilia and Allergic Airway Inflammation by The
    Regulation of eosinophilia and allergic airway PNAS PLUS inflammation by the glycan-binding protein galectin-1 Xiao Na Gea, Sung Gil Haa, Yana G. Greenberga, Amrita Raoa, Idil Bastana, Ada G. Blidnerb, Savita P. Raoa, Gabriel A. Rabinovichb,c,1, and P. Sriramaraoa,d,1,2 aDepartment of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN 55108; bLaboratorio de Inmunopatología, Instituto de Biología y Medicina Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas, C1428ADN Buenos Aires, Argentina; cFacultad de Ciencias Exactas y d Naturales, Universidad de Buenos Aires, C1428EGA Buenos Aires, Argentina; and Department of Medicine, University of Minnesota, Minneapolis, SEE COMMENTARY MN 55455 Edited by Jorge Geffner, UBA-CONICET, Buenos Aires, Argentina, and accepted by Editorial Board Member Lawrence Steinman June 13, 2016 (received for review February 4, 2016) Galectin-1 (Gal-1), a glycan-binding protein with broad antiinflamma- morphonuclear cells (PMNs), macrophages, dendritic cells tory activities, functions as a proresolving mediator in autoimmune (DCs), activated T cells, stromal cells, endothelial cells, and and chronic inflammatory disorders. However, its role in allergic epithelial cells (5, 6). At a cellular level, Gal-1 may act either airway inflammation has not yet been elucidated. We evaluated the intracellularly or extracellularly, and is profoundly involved in effects of Gal-1 on eosinophil function and its role in a mouse model resolving acute and chronic inflammation by affecting processes of allergic asthma. Allergen exposureresultedinairwayrecruitment such as immune cell adhesion, migration, activation, signaling, of Gal-1–expressing inflammatory cells, including eosinophils, as well proliferation, differentiation, and apoptosis (5, 7). Increasing evi- as increased Gal-1 in extracellular spaces in the lungs.
    [Show full text]
  • On Normal Tissue Homeostasis Maintenance of Immune Tolerance
    Maintenance of Immune Tolerance Depends on Normal Tissue Homeostasis Zita F. H. M. Boonman, Geertje J. D. van Mierlo, Marieke F. Fransen, Rob J. W. de Keizer, Martine J. Jager, Cornelis J. This information is current as M. Melief and René E. M. Toes of September 27, 2021. J Immunol 2005; 175:4247-4254; ; doi: 10.4049/jimmunol.175.7.4247 http://www.jimmunol.org/content/175/7/4247 Downloaded from References This article cites 48 articles, 21 of which you can access for free at: http://www.jimmunol.org/content/175/7/4247.full#ref-list-1 http://www.jimmunol.org/ Why The JI? Submit online. • Rapid Reviews! 30 days* from submission to initial decision • No Triage! Every submission reviewed by practicing scientists • Fast Publication! 4 weeks from acceptance to publication by guest on September 27, 2021 *average Subscription Information about subscribing to The Journal of Immunology is online at: http://jimmunol.org/subscription Permissions Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html Email Alerts Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts The Journal of Immunology is published twice each month by The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2005 by The American Association of Immunologists All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. The Journal of Immunology Maintenance of Immune Tolerance Depends on Normal Tissue Homeostasis Zita F. H. M. Boonman,* Geertje J. D. van Mierlo,† Marieke F. Fransen,† Rob J.
    [Show full text]
  • Understanding the Immune System: How It Works
    Understanding the Immune System How It Works U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES NATIONAL INSTITUTES OF HEALTH National Institute of Allergy and Infectious Diseases National Cancer Institute Understanding the Immune System How It Works U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES NATIONAL INSTITUTES OF HEALTH National Institute of Allergy and Infectious Diseases National Cancer Institute NIH Publication No. 03-5423 September 2003 www.niaid.nih.gov www.nci.nih.gov Contents 1 Introduction 2 Self and Nonself 3 The Structure of the Immune System 7 Immune Cells and Their Products 19 Mounting an Immune Response 24 Immunity: Natural and Acquired 28 Disorders of the Immune System 34 Immunology and Transplants 36 Immunity and Cancer 39 The Immune System and the Nervous System 40 Frontiers in Immunology 45 Summary 47 Glossary Introduction he immune system is a network of Tcells, tissues*, and organs that work together to defend the body against attacks by “foreign” invaders. These are primarily microbes (germs)—tiny, infection-causing Bacteria: organisms such as bacteria, viruses, streptococci parasites, and fungi. Because the human body provides an ideal environment for many microbes, they try to break in. It is the immune system’s job to keep them out or, failing that, to seek out and destroy them. Virus: When the immune system hits the wrong herpes virus target or is crippled, however, it can unleash a torrent of diseases, including allergy, arthritis, or AIDS. The immune system is amazingly complex. It can recognize and remember millions of Parasite: different enemies, and it can produce schistosome secretions and cells to match up with and wipe out each one of them.
    [Show full text]
  • Non-Hodgkin Lymphoma
    Non-Hodgkin Lymphoma Rick, non-Hodgkin lymphoma survivor This publication was supported in part by grants from Revised 2013 A Message From John Walter President and CEO of The Leukemia & Lymphoma Society The Leukemia & Lymphoma Society (LLS) believes we are living at an extraordinary moment. LLS is committed to bringing you the most up-to-date blood cancer information. We know how important it is for you to have an accurate understanding of your diagnosis, treatment and support options. An important part of our mission is bringing you the latest information about advances in treatment for non-Hodgkin lymphoma, so you can work with your healthcare team to determine the best options for the best outcomes. Our vision is that one day the great majority of people who have been diagnosed with non-Hodgkin lymphoma will be cured or will be able to manage their disease with a good quality of life. We hope that the information in this publication will help you along your journey. LLS is the world’s largest voluntary health organization dedicated to funding blood cancer research, education and patient services. Since 1954, LLS has been a driving force behind almost every treatment breakthrough for patients with blood cancers, and we have awarded almost $1 billion to fund blood cancer research. Our commitment to pioneering science has contributed to an unprecedented rise in survival rates for people with many different blood cancers. Until there is a cure, LLS will continue to invest in research, patient support programs and services that improve the quality of life for patients and families.
    [Show full text]
  • Peripheral Immune Tolerance Alleviates the Intracranial
    Liu et al. Journal of Neuroinflammation (2017) 14:223 DOI 10.1186/s12974-017-0994-3 RESEARCH Open Access Peripheral immune tolerance alleviates the intracranial lipopolysaccharide injection- induced neuroinflammation and protects the dopaminergic neurons from neuroinflammation-related neurotoxicity Yang Liu, Xin Xie, Li-Ping Xia, Hong Lv, Fan Lou, Yan Ren, Zhi-Yi He and Xiao-Guang Luo* Abstract Background: Neuroinflammation plays a critical role in the onset and development of neurodegeneration disorderssuchasParkinson’s disease. The immune activities of the central nervous system are profoundly affected by peripheral immune activities. Immune tolerance refers to the unresponsiveness of the immune system to continuous or repeated stimulation to avoid excessive inflammation and unnecessary by-stander injury in the face of continuous antigen threat. It has been proved that the immune tolerance could suppress the development of various peripheral inflammation-related diseases. However, the role of immune tolerance in neuroinflammation and neurodegenerative diseases was not clear. Methods: Rats were injected with repeated low-dose lipopolysaccharide (LPS, 0.3 mg/kg) intraperitoneally for 4 days to induce peripheral immune tolerance. Neuroinflammation was produced using intracranial LPS (15 μg) injection. Inflammation cytokines were measured using enzyme-linked immunosorbent assay (ELISA) and quantitative real-time polymerase chain reaction (qRT-PCR). Microglial activation were measured using immunostaining of Iba-1 and ED-1. Dopaminergic neuronal damage was evaluated using immunochemistry staining and stereological counting of TH-positive neurons. Behavioral impairment was evaluated using amphetamine-induced rotational behavioral assessment. Results: Compared with the non-immune tolerated animals, pre-treatment of peripheral immune tolerance significantly decreased the production of inflammatory cytokines, suppressed the microglial activation, and increased the number of dopaminergic neuronal survival in the substantia nigra.
    [Show full text]
  • Type 1 Regulatory T Cells: a New Mechanism of Peripheral Immune Tolerance
    Cellular & Molecular Immunology (2015) 12, 566–571 ß 2015 CSI and USTC. All rights reserved 1672-7681/15 $32.00 www.nature.com/cmi REVIEW Type 1 regulatory T cells: a new mechanism of peripheral immune tolerance Hanyu Zeng, Rong Zhang, Boquan Jin and Lihua Chen The lack of immune response to an antigen, a process known as immune tolerance, is essential for the preservation of immune homeostasis. To date, two mechanisms that drive immune tolerance have been described extensively: central tolerance and peripheral tolerance. Under the new nomenclature, thymus-derived regulatory T (tTreg) cells are the major mediators of central immune tolerance, whereas peripherally derived regulatory T (pTreg) cells function to regulate 1 peripheral immune tolerance. A third type of Treg cells, termed iTreg, represents only the in vitro-induced Treg cells . Depending on whether the cells stably express Foxp3, pTreg, and iTreg cells may be divided into two subsets: the classical 1 1 1 2 2 CD4 Foxp3 Treg cells and the CD4 Foxp3 type 1 regulatory T (Tr1) cells . This review focuses on the discovery, associated biomarkers, regulatory functions, methods of induction, association with disease, and clinical trials of Tr1 cells. Cellular & Molecular Immunology (2015) 12, 566–571; doi:10.1038/cmi.2015.44; published online 8 June 2015 Keywords: biomarkers; clinical trials; regulatory functions; type 1 regulatory T cells INTRODUCTION functions of these cells and ultimately to apply this knowledge The induction and formation of peripheral immune tolerance to the treatment of associated diseases. is essential to maintaining stability of the immune system. In addition to the immune system’s major roles in regulating THE DISCOVERY OF TR1 CELLS clonal deletion, antigen sequestration, and expression at privi- Tr1 cells were first described by Roncarolo et al.
    [Show full text]