390, BD Pharmingen), CD8a (53–6.7, BD Pharmingen), CD11b (550282, BD
Biosciences), CD88(C5aR1) (sc-31240, Santa Cruz Biotechnology), C3b/iC3b/C3c,
which binds only to C3 cleavage fragments but not to intact C3 (20 (link)) (HM 1065, Hycult Biotech), C1q (HM 1096BT,
Hycult), mannan binding lectin (NB100–1502 Novus), IgM antibodies
(14-5790-81, eBioscience) and Annexin V (sc-1929, Santa Cruz Biotechnology).
Secondary antibodies included: Goat anti-rat antibodies (Invitrogen):
Streptavidin-Cy2, Texas Red, and AF 633-conjugated; and donkey anti-goat AF
488-conjugated antibodies. Stainings were quantified with Nikon Elements
Advanced Research Image-Analysis software based on analysis of at least ten
fields per section. Data is expressed as the binary area occupied by positive
cells.