• Peter F Zipfel, Svante Zipfel, and Thorsten Wiech.
• Abteilung Infektionsbiologie, Leibniz institut für Naturstoff Forschung und Infektionsbiologie, Jena, Deutschland.
• Dtsch. Med. Wochenschr. 2023 Jun 1; 148 (12): 774779774-779.

AbstractComplement is a central part of the immune system. In the human body, complement is responsible for recognition of infectious microbes, for coordinating the adaptive immune response, controlling homeotic reactions and for the non-inflammatory removal of modified self-cells and infectious microbes. Complement is also closely linked to another proteolytic cascade, the coagulation system. Defective activation and altered complement regulation drives pathology of several severe human kidney diseases.This manuscript summarizes the latest developments on the role of complement in kidney diseases, on new complement inhibitors and on recent complement targeting therapies. In particular focusing on diseases (1) atypical Hemolytic Uremic Syndrome, (2) C3 Glomerulopathy, (3) Anti Neutrophil Cytoplasmic Antibody Mediated Vasculitis, (4) IgA Nephropathy, (5) Membranous Glomerulopathy, (6) Systemic Lupus Erythematosus, (7) Transplant rejection and (8) COVID 19 Infection-Triggered Kidney Diseases. More excitement is generated in this field, as more and more complement mediated diseases can be treated. Several complement targeting compounds are approved by the EMA and FDA and an increasing number of new candidates are in late phase clinical trials. In addition, clinical guidelines are developed for Diagnosis and Therapy of complement mediated diseases, new biomarkers are evaluated in clinical studies, and diagnostic guidelines are in development. The recent Covid infections showed a clear link of complement in thrombo inflammation, which ultimately results in kidney damage. These aspects have increased further the focus of complement inhibitors in COVID infections.Thieme. All rights reserved.

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