PMID- 27734926 OWN - NLM STAT- MEDLINE DCOM- 20180502 LR - 20181113 IS - 2045-2322 (Electronic) IS - 2045-2322 (Linking) VI - 6 DP - 2016 Oct 13 TI - Bone marrow-derived and peritoneal macrophages have different inflammatory response to oxLDL and M1/M2 marker expression - implications for atherosclerosis research. PG - 35234 LID - 10.1038/srep35234 [doi] LID - 35234 AB - Macrophages are heterogeneous and can polarize into specific subsets, e.g. pro-inflammatory M1-like and re-modelling M2-like macrophages. To determine if peritoneal macrophages (PEMs) or bone marrow derived macrophages (BMDMs) resembled aortic macrophages from ApoE-/- mice, their M1/M2 phenotype, inflammatory status, and lipid metabolism signatures were compared. oxLDL accumulation was similar in PEMs and BMDMs. On protein expression level, BMDMs showed an M2-like CD206(high)CD11c(low) profile, while cholesterol loading led to enhanced CD11c expression and reduced MCP-1 secretion. In contrast, PEMs expressed low levels of CD206 and CD11c, and responded to cholesterol loading by increasing CD11c expression and MCP-1 secretion. mRNA expression of M1/M2 markers was higher in PEMS than BMDMs, while lipid metabolism genes were similarly expressed. Whole aorta flow cytometry showed an accumulation of M2-like CD206(high)CD11c(low) macrophages in advanced versus early atherosclerotic disease in ApoE-/- mice. In isolated lesions, mRNA levels of the M2 markers Socs2, CD206, Retnla, and IL4 were downregulated with increasing disease severity. Likewise, mRNA expression of lipid metabolism genes (SREBP2, ACSL1, SRB1, DGAT1, and cpt1a) was decreased in advanced versus early lesions. In conclusion, PEMs and BMDMs are phenotypically distinct and differ from macrophages in lesions with respect to expression of M1/M2 markers and lipid metabolism genes. FAU - Bisgaard, Line S AU - Bisgaard LS AD - Dept. of Biomedical Sciences, University of Copenhagen, Denmark. AD - Dept. of Diabetic Complication Biology, Novo Nordisk, Denmark. FAU - Mogensen, Christina K AU - Mogensen CK AD - Dept. of Diabetic Complication Biology, Novo Nordisk, Denmark. FAU - Rosendahl, Alexander AU - Rosendahl A AD - Dept. of Diabetic Complication Biology, Novo Nordisk, Denmark. AD - Dept. of Biopharmaceuticals New Heamophilia, Novo Nordisk, Denmark. FAU - Cucak, Helena AU - Cucak H AD - Dept. of Diabetic Complication Biology, Novo Nordisk, Denmark. FAU - Nielsen, Lars Bo AU - Nielsen LB AD - Dept. of Biomedical Sciences, University of Copenhagen, Denmark. AD - Dept. of Clinical Biochemistry, Copenhagen University Hospital Rigshospitalet, Denmark. FAU - Rasmussen, Salka E AU - Rasmussen SE AD - Dept. of ADME, Novo Nordisk, Denmark. FAU - Pedersen, Tanja X AU - Pedersen TX AD - Dept. of Biomedical Sciences, University of Copenhagen, Denmark. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20161013 PL - England TA - Sci Rep JT - Scientific reports JID - 101563288 RN - 0 (Lipoproteins, LDL) RN - 0 (oxidized low density lipoprotein) SB - IM MH - Animals MH - Bone Marrow Cells/*cytology MH - Female MH - Inflammation/*pathology MH - Lipoproteins, LDL/*metabolism MH - Macrophages, Peritoneal/*cytology MH - Mice MH - Mice, Inbred C57BL PMC - PMC5062347 COIS- L.S.B., S.E.R., C.K.M., A.R. and H.C. has been or are employed at Novo Nordisk. EDAT- 2016/10/14 06:00 MHDA- 2018/05/03 06:00 PMCR- 2016/10/13 CRDT- 2016/10/14 06:00 PHST- 2016/03/22 00:00 [received] PHST- 2016/09/07 00:00 [accepted] PHST- 2016/10/14 06:00 [entrez] PHST- 2016/10/14 06:00 [pubmed] PHST- 2018/05/03 06:00 [medline] PHST- 2016/10/13 00:00 [pmc-release] AID - srep35234 [pii] AID - 10.1038/srep35234 [doi] PST - epublish SO - Sci Rep. 2016 Oct 13;6:35234. doi: 10.1038/srep35234.