PMID- 15286809 OWN - NLM STAT- MEDLINE DCOM- 20040825 LR - 20220310 IS - 0021-9738 (Print) IS - 0021-9738 (Linking) VI - 114 IP - 3 DP - 2004 Aug TI - IL-5 links adaptive and natural immunity specific for epitopes of oxidized LDL and protects from atherosclerosis. PG - 427-37 AB - During atherogenesis, LDL is oxidized, generating various oxidation-specific neoepitopes, such as malondialdehyde-modified (MDA-modified) LDL (MDA-LDL) or the phosphorylcholine (PC) headgroup of oxidized phospholipids (OxPLs). These epitopes are recognized by both adaptive T cell-dependent (TD) and innate T cell-independent type 2 (TI-2) immune responses. We previously showed that immunization of mice with MDA-LDL induces a TD response and atheroprotection. In addition, a PC-based immunization strategy that leads to a TI-2 expansion of innate B-1 cells and secretion of T15/EO6 clonotype natural IgM antibodies, which bind the PC of OxPLs within oxidized LDL (OxLDL), also reduces atherogenesis. T15/EO6 antibodies inhibit OxLDL uptake by macrophages. We now report that immunization with MDA-LDL, which does not contain OxPL, unexpectedly led to the expansion of T15/EO6 antibodies. MDA-LDL immunization caused a preferential expansion of MDA-LDL-specific Th2 cells that prominently secreted IL-5. In turn, IL-5 provided noncognate stimulation to innate B-1 cells, leading to increased secretion of T15/EO6 IgM. Using a bone marrow transplant model, we also demonstrated that IL-5 deficiency led to decreased titers of T15/EO6 and accelerated atherosclerosis. Thus, IL-5 links adaptive and natural immunity specific to epitopes of OxLDL and protects from atherosclerosis, in part by stimulating the expansion of atheroprotective natural IgM specific for OxLDL. FAU - Binder, Christoph J AU - Binder CJ AD - Division of Endocrinology & Metabolism, Department of Medicine, University of California, San Diego, La Jolla 92093-0682, USA. FAU - Hartvigsen, Karsten AU - Hartvigsen K FAU - Chang, Mi-Kyung AU - Chang MK FAU - Miller, Marina AU - Miller M FAU - Broide, David AU - Broide D FAU - Palinski, Wulf AU - Palinski W FAU - Curtiss, Linda K AU - Curtiss LK FAU - Corr, Maripat AU - Corr M FAU - Witztum, Joseph L AU - Witztum JL LA - eng GR - R01 HL069464/HL/NHLBI NIH HHS/United States GR - R01 HL057505/HL/NHLBI NIH HHS/United States GR - HL69464/HL/NHLBI NIH HHS/United States GR - R01 HL035297/HL/NHLBI NIH HHS/United States GR - HL56989/HL/NHLBI NIH HHS/United States GR - P50 HL056989/HL/NHLBI NIH HHS/United States GR - HL35297/HL/NHLBI NIH HHS/United States GR - R01 HL043815/HL/NHLBI NIH HHS/United States GR - HL43815/HL/NHLBI NIH HHS/United States GR - HL57505/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Clin Invest JT - The Journal of clinical investigation JID - 7802877 RN - 0 (Epitopes) RN - 0 (Immunoglobulin M) RN - 0 (Interleukin-5) RN - 0 (Lipoproteins, LDL) RN - 0 (oxidized low density lipoprotein) RN - 4Y8F71G49Q (Malondialdehyde) SB - IM CIN - J Clin Invest. 2004 Aug;114(3):317-9. PMID: 15286796 MH - Animals MH - Antibody Formation MH - Arteriosclerosis/*prevention & control MH - Bone Marrow Transplantation MH - Disease Models, Animal MH - Epitopes/*immunology MH - Female MH - *Immunity, Innate MH - Immunoglobulin M/metabolism MH - Interleukin-5/deficiency/genetics/*metabolism MH - Lipoproteins, LDL/drug effects/immunology/*metabolism MH - Malondialdehyde/pharmacology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Th2 Cells/immunology PMC - PMC484976 EDAT- 2004/08/03 05:00 MHDA- 2004/08/26 05:00 PMCR- 2004/08/01 CRDT- 2004/08/03 05:00 PHST- 2003/11/06 00:00 [received] PHST- 2004/05/25 00:00 [accepted] PHST- 2004/08/03 05:00 [pubmed] PHST- 2004/08/26 05:00 [medline] PHST- 2004/08/03 05:00 [entrez] PHST- 2004/08/01 00:00 [pmc-release] AID - 20479 [pii] AID - 10.1172/JCI20479 [doi] PST - ppublish SO - J Clin Invest. 2004 Aug;114(3):427-37. doi: 10.1172/JCI20479.