C5a receptor

Decreased migration of neutrophils
Decreased levels of TNF-alpha and interleukin 6 in the peritoneal reverse passive Arthus reaction
Reduced neutrophils migration and microvascular permeability changes

Reference:

Hopken UE, Lu B., Gerard NP, Gerard C.: Impaired inflammatory responses in the reverse arthus reaction through genetic deletion of the C5a receptor. J Exp Med 1997 Aug 29;186 (5):749-746