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Nature Biotechnology 24, 1279–1284 (1 October 2006) | doi:10.1038/nbt1248

Human C5aR knock-in mice facilitate the production and assessment of anti-inflammatory monoclonal antibodies

Hyun Lee , David Zahra , Alexis Vogelzang , Rebecca Newton , Jenny Thatcher , Annie Quan , Trina So , J|[ouml]|rg Zwirner , Frank Koentgen , S|[oslash]|ren B Padkj|[aelig]|r , Fabienne Mackay , Peter L Whitfeld & Charles R Mackay

Complement component C5a binds C5a receptor (C5aR) and facilitates leukocyte chemotaxis and release of inflammatory mediators. We used neutrophils from human C5aR knock-in mice, in which the mouse C5aR coding region was replaced with that of human C5aR, to immunize wild-type mice and to generate high-affinity antagonist monoclonal antibodies (mAbs) to human C5aR.