PMID- 27866511 OWN - NLM STAT- MEDLINE DCOM- 20170310 LR - 20190609 IS - 1976-670X (Electronic) IS - 1976-6696 (Print) IS - 1976-6696 (Linking) VI - 50 IP - 1 DP - 2017 Jan TI - Impaired phagocytosis of apoptotic cells causes accumulation of bone marrow-derived macrophages in aged mice. PG - 43-48 AB - Accumulation of tissue macrophages is a significant characteristic of disease-associated chronic inflammation, and facilitates the progression of disease pathology. However, the functional roles of these bone marrow-derived macrophages (BMDMs) in aging are unclear. Here, we identified agedependent macrophage accumulation in the bone marrow, showing that aging significantly increases the number of M1 macrophages and impairs polarization of BMDMs. We found that age-related dysregulation of BMDMs is associated with abnormal overexpression of the anti-inflammatory interleukin-10. BMDM dysregulation in aging impairs the expression levels of pro-inflammatory cytokines and genes involved in B-cell maturation and activation. Phagocytosis of apoptotic Jurkat cells by BMDMs was reduced because of low expression of phagocytic receptor CD14, indicating that increased apoptotic cells may result from defective phagocytosis of apoptotic cells in the BM of aged mice. Therefore, CD14 may represent a promising target for preventing BMDM dysregulation, and macrophage accumulation may provide diagnostic and therapeutic clues. [BMB Reports 2017; 50(1): 43-48]. FAU - Kim, Ok-Hee AU - Kim OH AD - Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea. FAU - Kim, Hyojung AU - Kim H AD - Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea. FAU - Kang, Jinku AU - Kang J AD - Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea. FAU - Yang, Dongki AU - Yang D AD - Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea. FAU - Kang, Yu-Hoi AU - Kang YH AD - Samsung Advanced Institute of Technology, Samsung Electronics Co. Ltd., Suwon 16678, Korea. FAU - Lee, Dae Ho AU - Lee DH AD - Lee Gil Ya Cancer and Diabetes Institute, College of Medicine, Gachon University, Incheon 21999, Korea. FAU - Cheon, Gi Jeong AU - Cheon GJ AD - Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul 03080, Korea. FAU - Park, Sang Chul AU - Park SC AD - Well Aging Research Center, DGIST, Daegu 42988, Korea. FAU - Oh, Byung-Chul AU - Oh BC AD - Lee Gil Ya Cancer and Diabetes Institute, College of Medicine; Department of Physiology, College of Medicine, Gachon University, Incheon 21999, Korea. LA - eng PT - Journal Article PL - Korea (South) TA - BMB Rep JT - BMB reports JID - 101465334 RN - 0 (Anti-Inflammatory Agents) RN - 0 (Cytokines) RN - 0 (Lipopolysaccharide Receptors) RN - 130068-27-8 (Interleukin-10) SB - IM MH - Aging/metabolism/*pathology MH - Animals MH - Anti-Inflammatory Agents/pharmacology MH - Apoptosis/*physiology MH - Bone Marrow Cells/*cytology/metabolism MH - Cell Differentiation/physiology MH - Cytokines/metabolism MH - Humans MH - Inflammation/pathology MH - Interleukin-10/metabolism MH - Jurkat Cells MH - Lipopolysaccharide Receptors/metabolism MH - Macrophages/*cytology/metabolism MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Phagocytosis/*physiology PMC - PMC5319664 EDAT- 2016/11/22 06:00 MHDA- 2017/03/11 06:00 PMCR- 2017/02/01 CRDT- 2016/11/22 06:00 PHST- 2016/09/29 00:00 [received] PHST- 2016/11/22 06:00 [pubmed] PHST- 2017/03/11 06:00 [medline] PHST- 2016/11/22 06:00 [entrez] PHST- 2017/02/01 00:00 [pmc-release] AID - 3674 [pii] AID - bmb-50-043 [pii] AID - 10.5483/bmbrep.2017.50.1.167 [doi] PST - ppublish SO - BMB Rep. 2017 Jan;50(1):43-48. doi: 10.5483/bmbrep.2017.50.1.167.