Current Challenges In Complement Diagnostics
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Current Challenges in Complement Diagnostics
Author: Erik J.M. Toonen
language: en
Publisher: Frontiers Media SA
Release Date: 2023-12-14
The complement system is an important innate immune surveillance network that has a key role in protecting our bodies against pathogens and other threats. It is a highly complex system consisting of approximately 50 soluble and cell surface-bound proteins that interact to eliminate danger signals. These signals include factors such as invading microorganisms, necrotic cells, and immune complexes. Furthermore, complement can link innate and adaptive immune responses by regulating T cell and B cell responses. The complement system is tightly regulated to avoid uncontrolled activation. Dysregulation of the complement system has been linked to numerous diseases, both rare and common. Uncontrolled or exaggerated activation can lead to life-threatening conditions such as dysregulation of coagulation, fibrinolysis, systemic inflammation and shock, and possible failure of a variety of organs such as the eyes, kidneys, skin, brain, and vascular system. In recent years, the complement system has gained increased interest, especially as a promising candidate for therapeutic intervention. Eculizumab, the first approved complement inhibitor, is highly effective for treating atypical hemolytic uremic syndrome (aHUS) and paroxysmal nocturnal hemoglobinuria (PNH). Many more drug candidates are currently evaluated in ongoing clinical trials.
Contemporary Challenges in Immunologic Testing in Clinical and Research Laboratories
Along the last several decades, it has been progressively appreciated that immunology plays an overwhelming role in the physiology and pathophysiology of most organs, tissues, and biological systems in multicellular organisms. Accordingly, several immunological parameters are used in research and clinical laboratories with the purpose of investigating, diagnosing, and monitoring a variety of pathological conditions. The rapidly evolving field of laboratory testing in immunology poses several challenges to professionals working in research and clinical laboratories, medical practice, educational activities, in vitro diagnostic industry, and regulatory agencies. Regular analytes, such as albumin, glucose, and insulin, are homogeneous among individuals of the same species. This property represents an advantage when it comes to optimize the determination methods as well as to establish standardization and quality assessment strategies. In contrast, several immunologic analytes present tremendous variability across individuals in the same species. In fact, some are unique at the individual level. For example, the repertoire of immunoglobulins specific for a given pathogen (e.g., rubella) is specific for each individual in terms of the balance of targeted antigens and epitopes, immunoglobulin isotypes, antibody avidity, Fc glycosylation rate, and so on. As a corollary, the panel of anti-rubella antibodies is necessarily different from one to other individual. This also applies to autoantibodies and to IgE to allergens. Polymorphism is prevalent for other immunologic parameters, such as Complement components, cell receptors (cluster differentiation molecules - CD) and downstream signal transduction mediators.
Contemporary Challenges in Diagnosis and Treatment of Predominantly Antibody Deficiency
Author: Emily S. J. Edwards
language: en
Publisher: Frontiers Media SA
Release Date: 2022-11-25
We acknowledge the initiation and support of this Research Topic by the International Union of Immunological Societies (IUIS). We hereby state publicly that the IUIS has had no editorial input in articles included in this Research Topic, thus ensuring that all aspects of this Research Topic are evaluated objectively, unbiased by any specific policy or opinion of the IUI.