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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sánchez-corral, Pilar Goicoechea De Jorge, Elena Harris, Claire L. Carreras, Luis Esparza-gordillo, Jorge Rodríguez De Córdoba, Santiago Arranz, Elena Aller Morgan, B. Paul Garrido, Cynthia Abarrategui López-trascasa, Margarita |
| Description | Author Affiliation: Goicoechea de Jorge E ( Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040 Madrid, Spain.); |
| Abstract | Hemolytic uremic syndrome (HUS) is an important cause of acute renal failure in children. Mutations in one or more genes encoding complement-regulatory proteins have been reported in approximately one-third of nondiarrheal, atypical HUS (aHUS) patients, suggesting a defect in the protection of cell surfaces against complement activation in susceptible individuals. Here, we identified a subgroup of aHUS patients showing persistent activation of the complement alternative pathway and found within this subgroup two families with mutations in the gene encoding factor B (BF), a zymogen that carries the catalytic site of the complement alternative pathway convertase (C3bBb). Functional analyses demonstrated that F286L and K323E aHUS-associated BF mutations are gain-of-function mutations that result in enhanced formation of the C3bBb convertase or increased resistance to inactivation by complement regulators. These data expand our understanding of the genetic factors conferring predisposition to aHUS, demonstrate the critical role of the alternative complement pathway in the pathogenesis of aHUS, and provide support for the use of complement-inhibition therapies to prevent or reduce tissue damage caused by dysregulated complement activation. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 1 |
| Volume Number | 104 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2007-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Complement Factor B Genetics Hemolytic-Uremic Syndrome Mutation Antigens, CD55 Pharmacology Chemistry Physiology Complement Factor H Complement Pathway, Alternative Etiology Immunology Structure-Activity Relationship Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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