PMID- 25041478 OWN - NLM STAT- MEDLINE DCOM- 20150212 LR - 20211021 IS - 1537-2995 (Electronic) IS - 0041-1132 (Print) IS - 0041-1132 (Linking) VI - 54 IP - 12 DP - 2014 Dec TI - Macrophages clear refrigerator storage-damaged red blood cells and subsequently secrete cytokines in vivo, but not in vitro, in a murine model. PG - 3186-97 LID - 10.1111/trf.12755 [doi] AB - BACKGROUND: In mice, refrigerator-stored red blood cells (RBCs) are cleared by extravascular hemolysis and induce cytokine production. To enhance understanding of this phenomenon, we sought to model it in vitro. STUDY DESIGN AND METHODS: Ingestion of refrigerator-stored murine RBCs and subsequent cytokine production were studied using J774A.1 mouse macrophage cells and primary murine splenic macrophages. Wild-type and Ccl2-GFP reporter mice were used for RBC clearance in vivo. RESULTS: Although J774A.1 cells and primary macrophages preferentially ingested refrigerator-stored RBCs in vitro, compared to freshly isolated RBCs, neither produced increased cytokines after erythrophagocytosis. In contrast, phagocytosis of refrigerator-stored RBCs in vivo induced increases in circulating monocyte chemoattractant protein-1 (MCP-1) and keratinocyte chemoattractant (KC) and correspondingly increased mRNA levels in mouse spleen and liver. In the spleen, these were predominantly expressed by CD11b+ cells. Using Ccl2-GFP reporter mice, the predominant splenic population responsible for MCP-1 mRNA production was tissue-resident macrophages (i.e., CD45+, CD11b+, F4/80+, Ly6c+, and CD11c(low) cells). CONCLUSION: J774A.1 cells and primary macrophages selectively ingested refrigerator-stored RBCs by phagocytosis. Although cytokine expression was not enhanced, this approach could be used to identify the relevant receptor-ligand combination(s). In contrast, cytokine levels increased after phagocytosis of refrigerator-stored RBCs in vivo. These were primarily cleared in the liver and spleen, which demonstrated increased MCP-1 and KC mRNA expression. Finally, in mouse spleen, tissue-resident macrophages were predominantly involved in MCP-1 mRNA production. The differences between cytokine production in vitro and in vivo are not yet well understood. CI - (c) 2014 AABB. FAU - Wojczyk, Boguslaw S AU - Wojczyk BS AD - Department of Pathology and Cell Biology, Columbia University College of Physicians and Surgeons-New York Presbyterian Hospital, New York, New York. FAU - Kim, Nina AU - Kim N FAU - Bandyopadhyay, Sheila AU - Bandyopadhyay S FAU - Francis, Richard O AU - Francis RO FAU - Zimring, James C AU - Zimring JC FAU - Hod, Eldad A AU - Hod EA FAU - Spitalnik, Steven L AU - Spitalnik SL LA - eng GR - K08 HL103756/HL/NHLBI NIH HHS/United States GR - R01 HL098014/HL/NHLBI NIH HHS/United States GR - K08-HL103756/HL/NHLBI NIH HHS/United States GR - R01-098014/PHS HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20140720 PL - United States TA - Transfusion JT - Transfusion JID - 0417360 RN - 0 (Ccl2 protein, mouse) RN - 0 (Chemokine CCL2) RN - 0 (Chemokine CXCL1) RN - 0 (Cxcl1 protein, mouse) SB - IM MH - Animals MH - *Blood Preservation MH - Cell Line MH - Chemokine CCL2/genetics/*metabolism MH - Chemokine CXCL1/genetics/*metabolism MH - *Erythrocyte Transfusion MH - *Erythrocytes MH - Liver/metabolism MH - Macrophages/*metabolism MH - Mice MH - Mice, Transgenic MH - *Models, Biological MH - *Phagocytosis MH - Spleen/metabolism MH - Time Factors PMC - PMC4267962 MID - NIHMS596037 COIS- Disclosure: The authors declare no conflicts of interest relevant to the manuscript submitted to Transfusion. EDAT- 2014/07/22 06:00 MHDA- 2015/02/13 06:00 PMCR- 2015/12/01 CRDT- 2014/07/22 06:00 PHST- 2013/11/02 00:00 [received] PHST- 2014/04/22 00:00 [revised] PHST- 2014/04/24 00:00 [accepted] PHST- 2014/07/22 06:00 [entrez] PHST- 2014/07/22 06:00 [pubmed] PHST- 2015/02/13 06:00 [medline] PHST- 2015/12/01 00:00 [pmc-release] AID - 10.1111/trf.12755 [doi] PST - ppublish SO - Transfusion. 2014 Dec;54(12):3186-97. doi: 10.1111/trf.12755. Epub 2014 Jul 20.