title: Tolerance is dependent on complement C3 fragment iC3b binding to antigen-presenting cells.
abstract: Systemic tolerance can be induced by the introduction of antigen into an immune-privileged site. Here we investigated the role of complement in the induction of tolerance after intraocular injection. We found that the development of antigen-specific tolerance is dependent on a complement activation product. The ligation of the complement C3 activation product iC3b to complement receptor type 3 (the iC3b receptor) on antigen-presenting cells resulted in the sequential production of transforming growth factor-beta2 and interleukin-10, which is essential for the induction of tolerance. These observations may extend to the development of both neonatal tolerance and other forms of acquired tolerance.
authors.affiliation: Department of Ophthalmology and Visual Sciences, Kentucky Lions Eye Center, University of Louisville, Louisville, Kentucky, USA.
authors.forename: Jeong-Hyeon
authors.initials: JH
authors.lastname: Sohn
authors.forename: Puran S
authors.initials: PS
authors.lastname: Bora
authors.forename: Hye-Jung
authors.initials: HJ
authors.lastname: Suk
authors.forename: Hector
authors.initials: H
authors.lastname: Molina
authors.forename: Henry J
authors.initials: HJ
authors.lastname: Kaplan
authors.forename: Nalini S
authors.initials: NS
authors.lastname: Bora
mesh_terms: D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology* / Q000378:metabolism; D015703:Antigens, CD; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D030161:Avian Proteins; D051926:Basigin; D001798:Blood Proteins; D003179:Complement C3b / Q000276:immunology*; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007108:Immune Tolerance / Q000276:immunology*; D016753:Interleukin-10 / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D018664:Interleukin-12 / Q000096:biosynthesis; D008562:Membrane Glycoproteins / Q000276:immunology; D051381:Rats; D011917:Rats, Inbred Lew; D016212:Transforming Growth Factor beta / Q000037:antagonists & inhibitors / Q000096:biosynthesis; D053781:Transforming Growth Factor beta2
chemical_list: D015703:Antigens, CD; D000951:Antigens, Neoplasm; D000954:Antigens, Surface; D030161:Avian Proteins; D001798:Blood Proteins; C102624:Bsg protein, Gallus gallus; C079432:Bsg protein, rat; D008562:Membrane Glycoproteins; D016212:Transforming Growth Factor beta; D053781:Transforming Growth Factor beta2; D016753:Interleukin-10; D051926:Basigin; D018664:Interleukin-12; D003179:Complement C3b