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Author: Marie H. Kosco-Vilbois
Publisher: Springer Science & Business Media
ISBN: 3642796036
Category : Medical
Languages : en
Pages : 215
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Book Description
Follicular dendritic cells (FOe) are unique among cells of the immune system. While their morphological characteristics re sulted in their inclusion as a 'dendritic cell type', tt1ey differ quite significantly from the other members of the dendritic cell family. In contrast to T-cell-associated dendritic cells or the Langerhans cells found in the skin, FOe reside in highly organized B cell follicles within secondary lymphoid tissues. This site of resi dence provided a nomenclature committee in 1982 with the second descriptive factor for the derivation of their name. The cardinal feature of FOe is to trap and retain antigen on the surface of their dendritic processes for extended amounts of time and it is this feature that provides the conceptual compo nent for the title of this book. In response to an antigenic challenge, primary B cell follicles undergo dynamic events, giving rise to germinal centers which are associated with activation, expansion, and differentiation processes of B cells. The interactions of B cells with Foe and T cells in the germinal centers are essential for generating the complete repertoire of antibody isotypes obtained during an antibody response. In addition, stimuli either initiated or main tained during the germinal center reponse leads to production of high affinity antibodies through the processes of somatic muta tion and clonal selection. In this context, FOe act as a pivotal source of antigen. They accumulate foreign proteins (e. g.
Author: Marie H. Kosco-Vilbois
Publisher: Springer Science & Business Media
ISBN: 3642796036
Category : Medical
Languages : en
Pages : 215
Get Book Here
Book Description
Follicular dendritic cells (FOe) are unique among cells of the immune system. While their morphological characteristics re sulted in their inclusion as a 'dendritic cell type', tt1ey differ quite significantly from the other members of the dendritic cell family. In contrast to T-cell-associated dendritic cells or the Langerhans cells found in the skin, FOe reside in highly organized B cell follicles within secondary lymphoid tissues. This site of resi dence provided a nomenclature committee in 1982 with the second descriptive factor for the derivation of their name. The cardinal feature of FOe is to trap and retain antigen on the surface of their dendritic processes for extended amounts of time and it is this feature that provides the conceptual compo nent for the title of this book. In response to an antigenic challenge, primary B cell follicles undergo dynamic events, giving rise to germinal centers which are associated with activation, expansion, and differentiation processes of B cells. The interactions of B cells with Foe and T cells in the germinal centers are essential for generating the complete repertoire of antibody isotypes obtained during an antibody response. In addition, stimuli either initiated or main tained during the germinal center reponse leads to production of high affinity antibodies through the processes of somatic muta tion and clonal selection. In this context, FOe act as a pivotal source of antigen. They accumulate foreign proteins (e. g.
Author: Eduard W. A. Kamperdijk
Publisher: Springer Science & Business Media
ISBN: 1461529301
Category : Medical
Languages : en
Pages : 631
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Book Description
These Proceedings contain the contributions of the participants of the Second International Symposium on Dendritic Cells that was held from the 1st to 25th of June 1992 in Amsterdam, the Netherlands. The First International Symposium on Dendritic Cells was organized as a Satellite symposium at the occasion of the 30th anniversary of the Japanese Reticuloendothelial Society by Dr. Y. Imai in Yamagata (Japan), in 1990. It was entitled "Dendritic Cells in Lymphoid Tissues," and focused primarily on the Interdigitating Cells (IDC), Epidermal Langerhans cells (LC) and Follicular Dendritic Cells (FDC) , from the point of view of human pathology. However, the concept of Dendritic Cell System, comprising the bone marrow derived IDC and LC but not the FDC, was based on animal experiments and mainly on in vitro experiments on isolated cells. In a report from the Reticuloendothelial Society Committee on Nomenclature in 1982, Tew, Thorbecke and Steinman had already characterized these different types of DC, but the gap between in vivo and in vitro function remained. In Amsterdam, the Symposium focused on the Role of Dendritic Cells in Fundamental and Clinical Immunology. First, recent developments in molecular biology of antigen presentation and cell biological aspects of signal transduction were discussed, in relation to the potential of DC to stimulate lymphocytes and to trigger their in vitro differentiation.
Author: Giovanna Lombardi
Publisher: Springer Science & Business Media
ISBN: 3540710299
Category : Medical
Languages : en
Pages : 358
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Book Description
The understanding of the role of dendritic cells (DCs) in immune responses has come a long way since Steinmann and colleagues described these cells in 1972. - tensive research during the intervening period has provided a good understanding of the complexity of the DC system and its pivotal role in immunity. It is also now clearer how different subsets of DCs interact and regulate each other and how DC populations affect the function of other cells of the immune system. The improved understanding of their role in immune response has led to the idea that modulation of DC functions by, for example, pharmacological agents could be used as a pot- tial therapeutic approach in some pathological conditions. The actual applicability and therapeutic potential of all these approaches is yet to be fully demonstrated but nonetheless, animal models of human diseases are proving to be very helpful in the evaluation of manipulated DCs as a new treatment in diseases like cancer, auto- munity or asthma. DCs are integral to the initiation and regulation of immune response (Banchereau et al. 2000). The outcome of antigen presentation by DCs is determined by their maturation status, which can be induced by their interaction with danger signals. To recognise a wide array of pathogen-associated molecular patterns (PAMP), DCs express a number of pattern recognition receptors (PRR) such as Toll-like rec- tors (TLRs) and C-type lectin receptors (CLR) that recognise structural components of pathogens and discriminate between self and non-self molecules.
Author: Giovanna Lombardi
Publisher: Springer
ISBN: 9783540710288
Category : Medical
Languages : en
Pages : 353
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Book Description
The understanding of the role of dendritic cells (DCs) in immune responses has come a long way since Steinmann and colleagues described these cells in 1972. - tensive research during the intervening period has provided a good understanding of the complexity of the DC system and its pivotal role in immunity. It is also now clearer how different subsets of DCs interact and regulate each other and how DC populations affect the function of other cells of the immune system. The improved understanding of their role in immune response has led to the idea that modulation of DC functions by, for example, pharmacological agents could be used as a pot- tial therapeutic approach in some pathological conditions. The actual applicability and therapeutic potential of all these approaches is yet to be fully demonstrated but nonetheless, animal models of human diseases are proving to be very helpful in the evaluation of manipulated DCs as a new treatment in diseases like cancer, auto- munity or asthma. DCs are integral to the initiation and regulation of immune response (Banchereau et al. 2000). The outcome of antigen presentation by DCs is determined by their maturation status, which can be induced by their interaction with danger signals. To recognise a wide array of pathogen-associated molecular patterns (PAMP), DCs express a number of pattern recognition receptors (PRR) such as Toll-like rec- tors (TLRs) and C-type lectin receptors (CLR) that recognise structural components of pathogens and discriminate between self and non-self molecules.
Author: Christina Tzung-Ying Lu
Publisher:
ISBN:
Category :
Languages : en
Pages : 156
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Book Description
Author: Ernst Heinen
Publisher: Landes Bioscience
ISBN:
Category : Dendritic cells
Languages : en
Pages : 208
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Book Description
This book covers different aspects of follicular dendritic cells: their morphological, phenotypic and functional features, their origin, relationship to B and T cells and their involvement in pathological conditions. These data are extensively presented in eleven chapters, well-illustrated and written by specialists. New unpublished results are given, for example, in addition to B cells, T cells also divide in contact with follicular dendritic cells. Follicles are thus not only nests for B cell proliferation but also provide stimuli for T cell multiplication and selection.
Author: Paola Ricciardi-Castagnoli
Publisher: Springer Science & Business Media
ISBN: 1475799667
Category : Medical
Languages : en
Pages : 566
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Book Description
These proceedings contain selected contributions from the participants to the Fourth International Symposium on Dendritic cells that was held in Venice (Lido) Italy, from Oc tober 5 to 10, 1996. The symposium was attended by more than 500 scientists coming from 24 different countries. Studies on dendritic cells (DC) have been greatly hampered by the difficulties in preparing sufficient cell numbers and in a reasonable pure form. At this meeting it has been shown that large quantities of DC can be generated from precursors in both mice and humans, and this possibility has enormously encouraged studies aimed to characterize DC physiology and DC-specific genes, and to employ DC therapeutically as adjuvants for im munization. The possibility of generating large numbers of autologous DC that can be used in the manipulation of the immune response against cancer and infectious diseases has tremendously boosted dendritic cell research and the role of DC in a number of medi cal areas has been heatedly discussed.
Author: Jacques Banchereau
Publisher: Springer Science & Business Media
ISBN: 1461519713
Category : Medical
Languages : en
Pages : 493
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Book Description
These Proceedings contain the contributions of the partIcIpants of the Third International Symposium on Dendritic Cells that was held in Annecy, France, from June 19 to June 24, 1994. This symposium represented a follow-up of the first and second international symposia that were held in Japan in 1990 and in the Netherlands in 1992. Dendritic cells are antigen-presenting cells, and are found in all tissues and organs of the body. They can be classified into: (1) interstitial dendritic cells of the heart, kidney, gut, and lung;(2) Langerhans cells in the skin and mucous membranes; (3) interdigitating dendritic cells in the thymic medulla and secondary lymphoid tissue; and (4) blood dendritic cells and lymph dendritic cells (veiled cells). Although dendritic cells in each of these compartments are all CD45+ leukocytes that arise from the bone marrow, they may exhibit differences that relate to maturation state and microenvironment. Dendritic cells are specialized antigen-presenting cells for T lymphocytes: they process and present antigens efficiently in situ, and stimulate responses from naive and memory T cells in the paracortical area of secondary lymphoid organs. Recent evidence also demonstrates their role in induction of tolerance. By contrast, the primary and secondary B-cell follicles contain follicular dendritic cells that trap and retain intact antigen as immune complexes for long periods of time. The origin of follicular dendritic cells is not clear, but most investigators believe that these cells are not leukocytes.
Author: J. Lindsay Whitton
Publisher: Springer Science & Business Media
ISBN: 3642720455
Category : Medical
Languages : en
Pages : 249
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Book Description
Antigen presentation is central to the immune response, and is instrumental in ensuring that the response mounted is that best suited to the eradication of the particular microbe faced. In this volume, experts in the field provide state-of-the-art descriptions of the antigen presentation pathways. How do viruses disrupt these critical pathways, and to what effect? Do all tissues present antigen in the same way? If not, why? What are the consequences of dysfunctional antigen presentation, seen in certain genetic disorders? This book considers not only the molecular details, but also their relevance to the whole organism.
Author: Lars B. Olding
Publisher: Springer Science & Business Media
ISBN: 3642606148
Category : Medical
Languages : en
Pages : 228
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Book Description
Discrimination of self from nonself is the major function of the immune system and understanding the mechanism(s) involved a main employer of immunologists. Hence, the age-old puzzle of why a fetus that contains a panel of major histocompatibility (MHC) antigens derived from its mother and its father is not rejected (spontaneously aborted) by lymphocytes from its mother who should theoretically recognize foreign MHC molecules from the father has remained of great interest. This dilemma has enticed immunologists and developmental biologists for many years. This volume was created to present the information currently on hand in this subject to the scientific public. The guest editor, Professor Lars Olding, has a long and distinguished history of contributions in this field, having been one of the main propo nents of the argument that lymphocytes from the fetus play an active role in this process by suppressing lymphocytes from the mother from proliferating and thereby acting as killer cells. His work has defined the phenomenon and identified suppressor molecules (factors) involved in the process. In a different but related chapter, Margareta Unander extends such observations to the clinical study of women with repeated "habitual" mIS carriages.
