PMID- 38222824 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240116 IS - 2081-3856 (Print) IS - 2081-6936 (Electronic) IS - 2081-6936 (Linking) VI - 14 IP - 1 DP - 2023 Jan 1 TI - The BET inhibitor apabetalone decreases neuroendothelial proinflammatory activation in vitro and in a mouse model of systemic inflammation. PG - 20220332 LID - 10.1515/tnsci-2022-0332 [doi] LID - 20220332 AB - Brain vascular inflammation is characterized by endothelial activation and immune cell recruitment to the blood vessel wall, potentially causing a breach in the blood - brain barrier, brain parenchyma inflammation, and a decline of cognitive function. The clinical-stage small molecule, apabetalone, reduces circulating vascular endothelial inflammation markers and improves cognitive scores in elderly patients by targeting epigenetic regulators of gene transcription, bromodomain and extraterminal proteins. However, the effect of apabetalone on cytokine-activated brain vascular endothelial cells (BMVECs) is unknown. Here, we show that apabetalone treatment of BMVECs reduces hallmarks of in vitro endothelial activation, including monocyte chemoattractant protein-1 (MCP-1) and RANTES chemokine secretion, cell surface expression of endothelial cell adhesion molecule VCAM-1, as well as endothelial capture of THP-1 monocytes in static and shear stress conditions. Apabetalone pretreatment of THP-1 downregulates cell surface expression of chemokine receptors CCR1, CCR2, and CCR5, and of the VCAM-1 cognate receptor, integrin alpha4. Consequently, apabetalone reduces THP-1 chemoattraction towards soluble CCR ligands MCP-1 and RANTES, and THP-1 adhesion to activated BMVECs. In a mouse model of brain inflammation, apabetalone counters lipopolysaccharide-induced transcription of endothelial and myeloid cell markers, consistent with decreased neuroendothelial inflammation. In conclusion, apabetalone decreases proinflammatory activation of brain endothelial cells and monocytes in vitro and in the mouse brain during systemic inflammation. CI - (c) 2023 the author(s), published by De Gruyter. FAU - Wasiak, Sylwia AU - Wasiak S AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Fu, Li AU - Fu L AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Daze, Emily AU - Daze E AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Gilham, Dean AU - Gilham D AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Rakai, Brooke D AU - Rakai BD AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Stotz, Stephanie C AU - Stotz SC AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Tsujikawa, Laura M AU - Tsujikawa LM AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Sarsons, Chris D AU - Sarsons CD AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Studer, Deborah AU - Studer D AD - Department of Biomedical Engineering, Department of Physiology and Pharmacology, Libin Cardiovascular Institute, University of Calgary, 2500 University Dr. NW, Calgary, AB, T2N 1N4, Canada. FAU - Rinker, Kristina D AU - Rinker KD AD - Department of Biomedical Engineering, Department of Physiology and Pharmacology, Libin Cardiovascular Institute, University of Calgary, 2500 University Dr. NW, Calgary, AB, T2N 1N4, Canada. FAU - Jahagirdar, Ravi AU - Jahagirdar R AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Wong, Norman C W AU - Wong NCW AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. FAU - Sweeney, Michael AU - Sweeney M AD - Resverlogix Corp., 535 Mission Street, 14th Floor, San Francisco, CA, 94105, USA. FAU - Johansson, Jan O AU - Johansson JO AD - Resverlogix Corp., 535 Mission Street, 14th Floor, San Francisco, CA, 94105, USA. FAU - Kulikowski, Ewelina AU - Kulikowski E AD - Resverlogix Corp., Suite 300, 4820 Richard Road SW, Calgary, AB, T3e 6L1, Canada. LA - eng PT - Journal Article DEP - 20231231 PL - Germany TA - Transl Neurosci JT - Translational neuroscience JID - 101550327 PMC - PMC10787226 OTO - NOTNLM OT - blood-brain barrier OT - bromodomain OT - epigenetics OT - inflammation OT - microvascular disease COIS- Conflict of interest: S.W., L.F, E.D., D.G., B.D.R., S.C.S, L.M.T., C.D.S., R.J., J.O.J., M.S., N.C.W.W., and E.K. were employed by Resverlogix Corp. at the time of the study and hold company's shares and stock options. All other authors state no conflict of interest. EDAT- 2024/01/15 06:43 MHDA- 2024/01/15 06:44 PMCR- 2023/12/31 CRDT- 2024/01/15 04:36 PHST- 2023/09/25 00:00 [received] PHST- 2023/12/15 00:00 [revised] PHST- 2023/12/19 00:00 [accepted] PHST- 2024/01/15 06:44 [medline] PHST- 2024/01/15 06:43 [pubmed] PHST- 2024/01/15 04:36 [entrez] PHST- 2023/12/31 00:00 [pmc-release] AID - tnsci-2022-0332 [pii] AID - 10.1515/tnsci-2022-0332 [doi] PST - epublish SO - Transl Neurosci. 2023 Dec 31;14(1):20220332. doi: 10.1515/tnsci-2022-0332. eCollection 2023 Jan 1.