Abstract:
:Immunoglobulin G (IgG) antibodies confer protection against pathogenic microorganisms, serve as therapeutics in tumor therapy, and are involved in destruction of healthy tissues during autoimmune diseases. Understanding the molecular pathways and effector cell types involved in antibody-mediated effector functions is a prerequisite to modulate these activities. In this study we used two independent model systems to identify innate immune effector cells required for IgG activity in vivo. We first defined the precise repertoire of receptors for the IgG Fc fragment (FcγR) on innate immune effector cells in the blood and on tissue-resident macrophage populations. Despite expression of relevant activating FcγRs on various phagocyte populations, our data indicate that the majority of these cell types are dispensable for IgG activity in vivo. In contrast, IgG-dependent effector functions were selectively impaired in animals lacking the CX(3)CR1(hi)Ly6C(lo)CD11c(int) monocyte subset, which expressed the full set of FcγRs required for IgG activity.
journal_name
Immunityjournal_title
Immunityauthors
Biburger M,Aschermann S,Schwab I,Lux A,Albert H,Danzer H,Woigk M,Dudziak D,Nimmerjahn Fdoi
10.1016/j.immuni.2011.11.009subject
Has Abstractpub_date
2011-12-23 00:00:00pages
932-44issue
6eissn
1074-7613issn
1097-4180pii
S1074-7613(11)00498-5journal_volume
35pub_type
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