PMID- 37824329 OWN - NLM STAT- MEDLINE DCOM- 20231106 LR - 20231113 IS - 2211-1247 (Electronic) VI - 42 IP - 10 DP - 2023 Oct 31 TI - ApoE enhances mitochondrial metabolism via microRNA-142a/146a-regulated circuits that suppress hematopoiesis and inflammation in hyperlipidemia. PG - 113206 LID - S2211-1247(23)01218-4 [pii] LID - 10.1016/j.celrep.2023.113206 [doi] AB - Apolipoprotein E (ApoE) is recognized for its pleiotropic properties that suppress inflammation. We report that ApoE serves as a metabolic rheostat that regulates microRNA control of glycolytic and mitochondrial activity in myeloid cells and hematopoietic stem and progenitor cells (HSPCs). ApoE expression in myeloid cells increases microRNA-146a, which reduces nuclear factor kappaB (NF-kappaB)-driven GLUT1 expression and glycolytic activity. In contrast, ApoE expression reduces microRNA-142a, which increases carnitine palmitoyltransferase 1a (CPT1A) expression, fatty acid oxidation, and oxidative phosphorylation. Improved mitochondrial metabolism by ApoE expression causes an enrichment of tricarboxylic acid (TCA) cycle metabolites and nicotinamide adenine dinucleotide (NAD(+)) in macrophages. The study of mice with conditional ApoE expression supports the capacity of ApoE to foster microRNA-controlled immunometabolism. Modulation of microRNA-146a and -142a in the hematopoietic system of hyperlipidemic mice using RNA mimics and antagonists, respectively, improves mitochondrial metabolism, which suppresses inflammation and hematopoiesis. Our findings unveil microRNA regulatory circuits, controlled by ApoE, that exert metabolic control over hematopoiesis and inflammation in hyperlipidemia. CI - Published by Elsevier Inc. FAU - Phu, Tuan Anh AU - Phu TA AD - Department of Veterans Affairs, Surgical Service (112G), San Francisco VA Medical Center, San Francisco, CA 94121, USA; Northern California Institute for Research and Education, San Francisco, CA 94121, USA. FAU - Vu, Ngan K AU - Vu NK AD - Department of Veterans Affairs, Surgical Service (112G), San Francisco VA Medical Center, San Francisco, CA 94121, USA; Northern California Institute for Research and Education, San Francisco, CA 94121, USA. FAU - Ng, Martin AU - Ng M AD - Department of Veterans Affairs, Surgical Service (112G), San Francisco VA Medical Center, San Francisco, CA 94121, USA; Northern California Institute for Research and Education, San Francisco, CA 94121, USA. FAU - Gao, Alex S AU - Gao AS AD - Department of Veterans Affairs, Surgical Service (112G), San Francisco VA Medical Center, San Francisco, CA 94121, USA; Northern California Institute for Research and Education, San Francisco, CA 94121, USA. FAU - Stoolman, Joshua S AU - Stoolman JS AD - Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA. FAU - Chandel, Navdeep S AU - Chandel NS AD - Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA; Department of Biochemistry & Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA. FAU - Raffai, Robert L AU - Raffai RL AD - Department of Veterans Affairs, Surgical Service (112G), San Francisco VA Medical Center, San Francisco, CA 94121, USA; Northern California Institute for Research and Education, San Francisco, CA 94121, USA; Department of Surgery, Division of Endovascular and Vascular Surgery, University of California, San Francisco, San Francisco, CA 94143, USA. Electronic address: robert.raffai@ucsf.edu. LA - eng GR - P30 DK063720/DK/NIDDK NIH HHS/United States GR - R01 HL133575/HL/NHLBI NIH HHS/United States GR - P01 HL154998/HL/NHLBI NIH HHS/United States GR - P01 AG049665/AG/NIA NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20231011 PL - United States TA - Cell Rep JT - Cell reports JID - 101573691 RN - 0 (MicroRNAs) RN - 0 (Apolipoproteins E) SB - IM MH - Mice MH - Animals MH - *Hyperlipidemias/genetics/metabolism MH - Inflammation/metabolism MH - *MicroRNAs/genetics/metabolism MH - *Metabolic Diseases MH - Hematopoiesis MH - Apolipoproteins E/genetics OTO - NOTNLM OT - ApoE OT - CP: Metabolism OT - CPT1A OT - Glut1 OT - fatty acid oxidation OT - hematopoiesis OT - inflammation OT - macrophage OT - microRNA-142a OT - microRNA-146a OT - mitochondrial metabolism COIS- Declaration of interests The authors declare no competing interests. EDAT- 2023/10/12 18:42 MHDA- 2023/11/06 06:43 CRDT- 2023/10/12 12:35 PHST- 2022/03/21 00:00 [received] PHST- 2023/05/08 00:00 [revised] PHST- 2023/09/19 00:00 [accepted] PHST- 2023/11/06 06:43 [medline] PHST- 2023/10/12 18:42 [pubmed] PHST- 2023/10/12 12:35 [entrez] AID - S2211-1247(23)01218-4 [pii] AID - 10.1016/j.celrep.2023.113206 [doi] PST - ppublish SO - Cell Rep. 2023 Oct 31;42(10):113206. doi: 10.1016/j.celrep.2023.113206. Epub 2023 Oct 11.