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Background: The AEGIS-II trial hypothesized that CSL112, an intravenous formulation of human apoA-I, would lower the risk of plaque disruption, decreasing the risk of recurrent events such as myocardial infarction (MI) among high-risk patients with MI., Objectives: This exploratory analysis evaluates the effect of CSL112 therapy on the incidence of cardiovascular (CV) death and recurrent MI., Methods: The AEGIS-II trial was an international, multicenter, randomized, double-blind, placebo-controlled trial that randomized 18,219 high-risk acute MI patients to 4 weekly infusions of apoA-I (6 g CSL112) or placebo., Results: The incidence of the composite of CV death and type 1 MI was 11% to 16% lower in the CSL112 group over the study period (HR: 0.84; 95% CI: 0.7-1.0; P = 0.056 at day 90; HR: 0.86; 95% CI: 0.74-0.99; P = 0.048 at day 180; and HR: 0.89; 95% CI: 0.79-1.01; P = 0.07 at day 365). Similarly, the incidence of CV death or any MI was numerically lower in CSL112-treated patients throughout the follow-up period (HR: 0.92; 95% CI: 0.80-1.05 at day 90, HR: 0.89; 95% CI: 0.79-0.996 at day 180, HR: 0.91; 95% CI: 0.83-1.01 at day 365). The effect of CSL112 treatment on MI was predominantly observed for type 1 MI and type 4b (MI due to stent thrombosis)., Conclusions: Although CSL112 did not significantly reduce the occurrence of the primary study endpoints, patients treated with CSL112 infusions had numerically lower rates of CV death and MI, type-1 MI, and stent thrombosis-related MI compared with placebo. These findings could suggest a role of apoA-I in reducing subsequent plaque disruption events via enhanced cholesterol efflux. Further prospective data would be needed to confirm these observations., Competing Interests: Funding Support and Author Disclosures This study was funded by CSL Behring. Dr Povsic has received research funding paid to his institution from CSL Behring; has received research funding from Xylocor Inc, Ionis, Bayer, Roche, and the National Institutes of Health (NIH); and has received consulting income from Novo Nordisk, Corvia, and Boehringer Ingelheim. Dr Korjian has received research grant support paid to the Beth Israel Deaconess Medical Center, Harvard Medical School from CSL Behring. Dr Bahit has received modest honorarium from MSD, Pfizer, Bristol Myers Squibb, CSL Behring, Janssen, Boehringer Ingelheim, and Anthos Therapeutics. Dr Chi has received research grant support paid to the Beth Israel Deaconess Medical Center, Harvard Medical School from Bayer, Janssen Scientific Affairs, and CSL Behring. Dr Duffy is an employee of CSL Behring. Dr Alexander has received research grants from Artivion/CryoLife, Bayer, Bristol Myers Squibb, CSL Behring, Ferring, the U.S. Food and Drug Administration, Humacyte, and the NIH; and has received advisory board/consulting payments from AbbVie, Artivion/CryoLife, AtriCure, Bayer, Bristol Myers Squibb, Eli Lilly, Ferring, GlaxoSmithKline, Janssen, Novostia, Pfizer, Portola, Theravance, and Veralox. Dr Vinereanu has received research grants from CSL Behring, Bayer, Novartis, Amgen, and Boehringer Ingelheim; and has received consultancy fees from Bayer, Novartis, Amgen, and Boehringer Ingelheim. Dr Tricoci, Ms Mears, and Dr Deckelbaum are employees of CSL Behring. Dr Bonaca is the Executive Director of CPC, a nonprofit academic research organization affiliated with the University of Colorado, that receives or has received research grant/consulting funding between August 2021 and the present from Abbott Laboratories, Agios Pharmaceuticals, Inc, Alexion Pharma, Alnylam Pharmaceuticals, Inc, Amgen Inc, Angionetics, Inc, Anthos Therapeutics, ARCA Biopharma, Inc, Array BioPharma, Inc, AstraZeneca and Affiliates, Atentiv LLC, Audentes Therapeutics, Inc, Bayer and Affiliates, Beth Israel Deaconess Medical Center, Better Therapeutics, Inc, Boston Clinical Research Institute, Bristol Myers Squibb Company, Cambrian Biopharma, Inc, Cardiol Therapeutics Inc, CellResearch Corp, Cleerly Inc, Cook Regentec LLC, CSL Behring LLC, Eidos Therapeutics, Inc, EP Trading Co Ltd, EPG Communication Holdings Ltd, Epizon Pharma, Inc, Esperion Therapeutics, Inc, Everly Well, Inc, Exicon Consulting Pvt Ltd, Faraday Pharmaceuticals, Inc, Foresee Pharmaceuticals Co Ltd, Fortress Biotech, Inc, HDL Therapeutics Inc, HeartFlow Inc, Hummingbird Bioscience, Insmed Inc, Ionis Pharmaceuticals, IQVIA Inc, Janssen and Affiliates, Kowa Research Institute, Inc, Kyushu University, Lexicon Pharmaceuticals, Inc, Medimmune Ltd, Medpace, Merck & Affiliates, Nectero Medical Inc, Novartis Pharmaceuticals Corp, Novo Nordisk, Inc, Osiris Therapeutics Inc, Pfizer Inc, PhaseBio Pharmaceuticals, Inc, PPD Development, LP, Prairie Education and Research Cooperative, Prothena Biosciences Limited, Regeneron Pharmaceuticals, Inc, Regio Biosciences, Inc, Saint Luke’s Hospital of Kansas City, Sanifit Therapeutics S.A., Sanofi-Aventis Groupe, Silence Therapeutics PLC, Smith & Nephew plc, Stanford Center for Clinical Research, Stealth BioTherapeutics Inc, State of Colorado CCPD Grant, The Brigham & Women's Hospital, Inc, The Feinstein Institutes for Medical Research, Thrombosis Research Institute, University of Colorado, University of Pittsburgh, VarmX, Virta Health Corporation, Worldwide Clinical Trials Inc, WraSer, LLC, and Yale Cardiovascular Research Group. Dr Ridker has received institutional research grant support from Kowa, Novartis, Amarin, Pfizer, Esperion, Novo Nordisk, and the National Heart, Lung, and Blood Institute (NHLBI); during the past 5 years has served as a consultant to Novartis, Flame, Agepha, Ardelyx, Arrowhead, AstraZeneca, CSL Behring, Janssen, Civi Biopharm, GlaxoSmithKline, SOCAR, Novo Nordisk, Health Outlook, Montai Health, Eli Lilly, New Amsterdam, Boehringer Ingelheim, RTI, Zomagen, Cytokinetics, Horizon Therapeutics, and Cardio Therapeutics; has minority shareholder equity positions in Uppton, Bitteroot Bio, and Angiowave; and has received compensation for service on the Peter Munk Advisory Board (University of Toronto), the Leducq Foundation, Paris FR, and the Baim Institute (Boston, Massachusetts). Dr Goodman has received research grant support (eg, steering committee or data and safety monitoring committee) and/or speaker/consulting honoraria (eg, advisory boards) from Amgen, Anthos Therapeutics, AstraZeneca, Bayer, Boehringer Ingelheim, Bristol Myers Squibb, CSL Behring, CYTE Ltd, Daiichi-Sankyo/American Regent, Eli Lilly, Esperion, Ferring Pharmaceuticals, HLS Therapeutics, Idorsia, JAMP Pharma, Merck, Novartis, Novo Nordisk A/C, Pendopharm/Pharmascience, Pfizer, Regeneron, Sanofi, Servier, Tolmar Pharmaceuticals, and Valeo Pharma; and has received salary support/honoraria from the Canadian Heart Failure Society, Canadian Heart Research Centre and MD Primer, Canadian VIGOUR Centre, Cleveland Clinic Coordinating Centre for Clinical Research, Duke Clinical Research Institute, Jewish General Hospital, New York University Clinical Coordinating Centre, PERFUSE Research Institute, Peter Munk Cardiac Centre Clinical Trials and Translation Unit, and TIMI Study Group (Brigham Health). Dr Cornel has served on advisory boards for Amgen and AstraZeneca. Dr Lewis has received consulting fees from Janssen R&D and Idorsia. Prof Parkhomenko has received research grants from CSL Behring, Amgen, Novo Nordisk, and Boehringer Ingelheim; and has received consulting or speaking fees from Novo Nordisk, AstraZeneca, Pfizer, Sanofi, and Boehringer Ingelheim. Dr Lopes has received research grants or contracts from Amgen, Bristol Myers Squibb, GlaxoSmithKline, Medtronic, Pfizer, and Sanofi-Aventis; has received funding for educational activities or lectures from Pfizer, Daiichi-Sankyo, and Novo Nordisk; and has received funding for consulting or other services from Bayer, Boehringer Ingelheim, Bristol Myers Squibb, and Novo Nordisk. Dr Aylward has received research support from CSL and Janssen Advisory Board; and has received honoraria and speaker fees from Novartis, Boehringer Ingelheim, Amgen, and AstraZeneca. Dr Lincoff has received honoraria for consulting activities from Novo Nordisk, Eli Lilly, Akebia, Ardelyx, Becton Dickson, Endologix, Fibrogen, GlaxoSmithKline, Medtronic, Neovasc, Provention Bio, ReCor, Brainstorm Cell, Alnylam, and Intarcia; and has received research funding to his institution from AbbVie, Esperion, AstraZeneca, CSL Behring, Novartis, and Eli Lilly. Dr Heise is an employee of CSL Behring. Dr Sacks has received support from CSL Behring. Dr Nicolau is recipient of a scholarship from National Council of Scientific and Technological Development (Conselho Nacional de Desenvolvimento Científico e Tecnológico – CNPq) # 303448/2021-0; has received research grants from Amgen, AstraZeneca, Bayer, CSL Behring, Daiichi-Sankyo, Dalcor, Esperion, Ionis, Janssen, Novartis, Novo Nordisk, Sanofi, and Vifor; and has received consulting fees from Libbs. Prof Merkely has received direct personal payment (speaker fees, studies) from Abbott, AstraZeneca, Biotronik, Boehringer Ingelheim, CSL Behring, Daiichi-Sankyo, DUKE Clinical Institute, Medtronic, and Novartis; and has received institutional grants (for the Heart and Vascular Center of Semmelweis University) from Abbott, AstraZeneca, Biotronik, Boehringer Ingelheim, Boston Scientific, Bristol Myers Squibb, CSL Behring, Daiichi-Sankyo, DUKE Clinical Institute, Eli Lilly, Medtronic, Novartis, Terumo, and Vifor Pharma. Dr Trebacz has received research support from CSL Behring. Dr Libby is an unpaid consultant to, or involved in clinical trials for Amgen, AstraZeneca, Baim Institute, Beren Therapeutics, Esperion Therapeutics, Genentech, Kancera, Kowa Pharmaceuticals, Medimmune, Merck, Moderna, Novo Nordisk, Novartis, Pfizer, and Sanofi-Regeneron; and is a member of the scientific advisory board for Amgen, Caristo Diagnostics, Cartesian Therapeutics, CSL Behring, DalCor Pharmaceuticals, Eulicid Bioimaging, Kancera, Kowa Pharmaceuticals, Olatec Therapeutics, Medimmune, Novartis, PlaqueTec, TenSixteen Bio, Soley Therapeutics, and XBiotech, Inc; has received research funding to his laboratory in the past 2 years from Novartis, Novo Nordisk, and Genentech; is on the Board of Directors of XBiotech, Inc; has a financial interest in XBiotech, a company developing therapeutic human antibodies, in TenSixteen Bio, a company targeting somatic mosaicism and clonal hematopoiesis of indeterminate potential to discover and develop novel therapeutics to treat age-related diseases, and in Soley Therapeutics, a biotechnology company that is combining artificial intelligence with molecular and cellular response detection for discovering and developing new drugs, currently focusing on cancer therapeutics; and has received funding support from the NHLBI (1R01HL134892 and 1R01HL163099-01), the RRM Charitable Fund, and the Simard Fund. Dr Nicholls has received research support from AstraZeneca, Amgen, Anthera, CSL Behring, Cerenis, Cyclarity, Eli Lilly, Esperion, Resverlogix, New Amsterdam Pharma, Novartis, InfraReDx, and Sanofi-Regeneron; and has served as a consultant for Amgen, Akcea, AstraZeneca, Boehringer Ingelheim, CSL Behring, Eli Lilly, Esperion, Kowa, Merck, Takeda, Pfizer, Sanofi-Regeneron, Vaxxinity, CSL Sequiris, and Novo Nordisk. Dr Pocock has served as a consultant for CSL Behring as a member of executive and publications committees. Dr Bhatt discloses the following relationships: Advisory Board: Angiowave, Bayer, Boehringer Ingelheim, CellProthera, Cereno Scientific, Elsevier Practice Update Cardiology, High Enroll, Janssen, Level Ex, McKinsey, Medscape Cardiology, Merck, MyoKardia, NirvaMed, Novo Nordisk, PhaseBio, PLx Pharma, Stasys; Board of Directors: American Heart Association New York City, Angiowave (stock options), Bristol Myers Squibb (stock), DRS.LINQ (stock options), High Enroll (stock); Consultant: Broadview Ventures, GlaxoSmithKline, Hims, SFJ, Youngene; Data Monitoring Committees: Acesion Pharma, Assistance Publique-Hôpitaux de Paris, Baim Institute for Clinical Research (formerly Harvard Clinical Research Institute, for the PORTICO trial, funded by St. Jude Medical, now Abbott), Boston Scientific (Chair, PEITHO trial), Cleveland Clinic, Contego Medical (Chair, PERFORMANCE 2), Duke Clinical Research Institute, Mayo Clinic, Mount Sinai School of Medicine (for the ENVISAGE trial), funded by Daiichi-Sankyo; for the ABILITY-DM trial, funded by Concept Medical; for ALLAY-HF, funded by Alleviant Medical, Novartis, Population Health Research Institute; Rutgers University (for the NIH-funded MINT Trial); Honoraria: American College of Cardiology (Senior Associate Editor, Clinical Trials and News, ACC.org; Chair, ACC Accreditation Oversight Committee), Arnold and Porter law firm (work related to Sanofi/Bristol Myers Squibb clopidogrel litigation), Baim Institute for Clinical Research (formerly Harvard Clinical Research Institute; RE-DUAL PCI clinical trial steering committee funded by Boehringer Ingelheim; AEGIS-II executive committee funded by CSL Behring), Belvoir Publications (Editor in Chief, Harvard Heart Letter), Canadian Medical and Surgical Knowledge Translation Research Group (clinical trial steering committees), CSL Behring (AHA lecture), Cowen and Company, Duke Clinical Research Institute (clinical trial steering committees, including for the PRONOUNCE trial, funded by Ferring Pharmaceuticals), HMP Global (Editor in Chief, Journal of Invasive Cardiology), Journal of the American College of Cardiology (Guest Editor; Associate Editor), K2P (Co-Chair, interdisciplinary curriculum), Level Ex, Medtelligence/ReachMD (CME steering committees), MJH Life Sciences, Oakstone CME (Course Director, Comprehensive Review of Interventional Cardiology), Piper Sandler, Population Health Research Institute (for the COMPASS operations committee, publications committee, steering committee, and USA national co-leader, funded by Bayer), WebMD (CME steering committees), Wiley (steering committee); Other: Clinical Cardiology (Deputy Editor); Patent: Sotagliflozin (named on a patent for sotagliflozin assigned to Brigham & Women's Hospital who assigned to Lexicon; neither I nor Brigham & Women's Hospital receive any income from this patent); research funding: Abbott, Acesion Pharma, Afimmune, Aker Biomarine, Alnylam, Amarin, Amgen, AstraZeneca, Bayer, Beren, Boehringer Ingelheim, Boston Scientific, Bristol Myers Squibb, Cardax, CellProthera, Cereno Scientific, Chiesi, CinCor, Cleerly, CSL Behring, Eisai, Ethicon, Faraday Pharmaceuticals, Ferring Pharmaceuticals, Forest Laboratories, Fractyl, Garmin, HLS Therapeutics, Idorsia, Ironwood, Ischemix, Janssen, Javelin, Lexicon, Lilly, Medtronic, Merck, Moderna, MyoKardia, NirvaMed, Novartis, Novo Nordisk, Otsuka, Owkin, Pfizer, PhaseBio, PLx Pharma, Recardio, Regeneron, Reid Hoffman Foundation, Roche, Sanofi, Stasys, Synaptic, The Medicines Company, Youngene, 89Bio; royalties: Elsevier (Editor, Braunwald’s Heart Disease); site co-investigator: Abbott, Biotronik, Boston Scientific, CSI, Endotronix, St Jude Medical (now Abbott), Philips, SpectraWAVE, Svelte, Vascular Solutions; trustee: American College of Cardiology; unfunded research: FlowCo. Dr Kastelein has served on a clinical trials steering committee for Novartis, NewAmsterdam Pharma, and CSL Behring; has served as a consultant or speaker for Scribe, CiVi Biotech, Draupnir, 89Bio, and Esperion Therapeutics; and is Chief Science Officer at NewAmsterdam Pharma. Dr Bode has received research support from CSL Behring. Dr Mahaffey has received research funding from the American Heart Association, Apple, Inc, Bayer, California Institute of Regenerative medicine, CLS Behring, Eidos, Ferring, Gilead, Google (Verily), Idorsia, Johnson & Johnson, Luitpold, Novartis, PAC-12, Predordior, and Sanifit; has served as a consultant for Applied Therapeutics, Bayer, BMS, BridgeBio, CSL Behring, Elsevier, Fosun Pharma, Human, Johnson & Johnson, Moderna, Myokardia, Novartis, Novo Nordisk, Otsuka, Phasebio, Portola, Quidel, and Theravance; and has equity in Human, Medeloop, Precordior, and Regencor. Dr Steg has received research grants from Amarin and Sanofi; has served on clinical trials (steering committee, clinical events committee, data and safety monitoring board [DSMB]) for Amarin, Amgen, AstraZeneca, Bayer, Bristol Myers Squibb, CSL Behring, Idorsia, Janssen, Novartis, Novo Nordisk, Pfizer, and Sanofi; has served as a consultant or speaker for Amarin, Amgen, BMS, and Novo Nordisk; and is Senior Associate Editor at Circulation. Dr Tendera has received consultation fees from the PERFUSE Group for participation in the executive committee, sponsored by CSL Behring for meetings of the study; has received consultation fees from Bayer, Janssen-Cilag, Kowa, and Servier for activities unrelated to the study; and has received a lecture honorarium from Bayer. Dr Bainey has received research support from CSL Behring. Dr Harrington has research relationships with Baim Institute (DSMB), CSL (Randomized Controlled Trial [RCT] Executive Committee), Janssen (RCT Chair), NHLBI (RCT Executive Committee; DSMB Chair), PCORI (RCT Co-Chair), and DCRI; has served as a consultant for Atropos Health, Bitterroot Bio, BMS, BridgeBio, Element Science, Edwards Lifesciences, Foresite Labs, and Medscape/WebMD; and has served on the board of directors for American Heart Association, College of the Holy Cross, and Cytokinetics. Dr Mehran has received institutional research payments from Abbott, Abiomed, Affluent Medical, Alleviant Medical, Amgen, AM-Pharma, Arena, AstraZeneca, AtriCure Inc, Biosensors, Biotronik, Boston Scientific, Bristol Myers Squibb, CardiaWave, CeloNova, CERC, Chiesi, Cleerly Health Inc, Concept Medical, Cytosorbents, Daiichi-Sankyo, Duke, Element Science, Essential Medical, Faraday, Idorsia Pharmaceuticals, Janssen, MedAlliance, Mediasphere, Medtelligence, Medtronic, MJH Healthcare, Novartis, OrbusNeich, Penumbra, PhaseBio, Philips, Pi-Cardia, PLx Pharma, Population Health Research Institute, Protembis, RecCor Medical Inc, RenalPro, RM Global, Sanofi, Shockwave, Vivasure, and Zoll; has received personal fees from Affluent Medical, Boehringer Ingelheim, Cardiovascular Research Foundation (CRF), Cordis, Daiichi-Sankyo Brasil, E.R. Squibb & Sons, Esperion Science/Innovative Biopharma, Europa Group/Boston Scientific, Gaffney Events, Educational Trust, Henry Ford Health Cardiology, Ionis Pharmaceuticals, Lilly and Company, MedCon International, Novartis, Novo Nordisk, PeerView Institute for Medical Education, TERUMO Europe N.V., Vectura, VoxMedia, WebMD, IQVIA, Radcliffe, and TARSUS Cardiology; has served on the Scientific Advisory Board fpr AMA; has served as a Women in Innovations Committee Member for SCAI; has received faculty CRF honorarium from JAMA Cardiology (Associate Editor), ACC (BOT Member, SC Member CTR Program); and has equity <1% in Applied Therapeutics, Elixir Medical, Stel, CntrolRad (spouse). Dr Duerschmied has received speaker honoraria from Daiichi-Sankyo, Bayer Healthcare, Boston Scientific, Pfizer, and AOP Health; and has received consulting fees from Boston Scientific, CSL Behring, and Johnson & Johnson. Dr Kingwell is an employee and shareholder of CSL Ltd. Dr Gibson has received research funding from CSL Behring, Janssen Pharmaceuticals, Johnson & Johnson Corporation, and SCAD Alliance; has received consulting from Angel/Avertix Medical Corporation, AstraZeneca, Bayer Corporation, Beren Therapeutics, Boehringer Ingelheim, Boston Clinical Research Institute, Boston Scientific, Bristol Myers Squibb, Cardiovascular Research Foundation, CeleCor Therapeutics, CSL Behring, DCRI, Esperion, EXCITE International ($0 received), Fortress Biotech, Gilead Sciences, Inc, Janssen, Pharmaceuticals, Johnson & Johnson Corporation, MashUp MD, MD Magazine, Microport, MJHealth, Novartis, NovoNordisk, Pfizer, PHRI, PLxPharma, SCAI, Solstic Health/New Amsterdam Pharma, Somahlution/Marizyme, Vectura, Web MD, and Women as One; has equity in nference, Dyad Medical, Absolutys, Fortress Biotech; and has received royalties as contributor to UpToDate., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)

Background: Cardiovascular events frequently recur after acute myocardial infarction, and low cholesterol efflux - a process mediated by apolipoprotein A1, which is the main protein in high-density lipoprotein - has been associated with an increased risk of cardiovascular events. CSL112 is human apolipoprotein A1 derived from plasma that increases cholesterol efflux capacity. Whether infusions of CSL112 can reduce the risk of recurrent cardiovascular events after acute myocardial infarction is unclear., Methods: We conducted an international, double-blind, placebo-controlled trial involving patients with acute myocardial infarction, multivessel coronary artery disease, and additional cardiovascular risk factors. Patients were randomly assigned to receive either four weekly infusions of 6 g of CSL112 or matching placebo, with the first infusion administered within 5 days after the first medical contact for the acute myocardial infarction. The primary end point was a composite of myocardial infarction, stroke, or death from cardiovascular causes from randomization through 90 days of follow-up., Results: A total of 18,219 patients were included in the trial (9112 in the CSL112 group and 9107 in the placebo group). There was no significant difference between the groups in the risk of a primary end-point event at 90 days of follow-up (439 patients [4.8%] in the CSL112 group vs. 472 patients [5.2%] in the placebo group; hazard ratio, 0.93; 95% confidence interval [CI], 0.81 to 1.05; P = 0.24), at 180 days of follow-up (622 patients [6.9%] vs. 683 patients [7.6%]; hazard ratio, 0.91; 95% CI, 0.81 to 1.01), or at 365 days of follow-up (885 patients [9.8%] vs. 944 patients [10.5%]; hazard ratio, 0.93; 95% CI, 0.85 to 1.02). The percentage of patients with adverse events was similar in the two groups; a higher number of hypersensitivity events was reported in the CSL112 group., Conclusions: Among patients with acute myocardial infarction, multivessel coronary artery disease, and additional cardiovascular risk factors, four weekly infusions of CSL112 did not result in a lower risk of myocardial infarction, stroke, or death from cardiovascular causes than placebo through 90 days. (Funded by CSL Behring; AEGIS-II ClinicalTrials.gov number, NCT03473223.)., (Copyright © 2024 Massachusetts Medical Society.)

Background: To characterize the effects of CSL112 (human APOA1 [apolipoprotein A1]) on the APOA1 exchange rate (AER) and the relationships with specific HDL (high-density lipoprotein) subpopulations when administered in the 90-day high-risk period post-acute myocardial infarction., Methods: A subset of patients (n=50) from the AEGIS-I (ApoA-I Event Reducing in Ischemic Syndromes I) study received either placebo or CSL112 post-acute myocardial infarction. AER was measured in AEGIS-I plasma samples incubated with lipid-sensitive fluorescent APOA1 reporter. HDL particle size distribution was assessed by native gel electrophoresis followed by fluorescent imaging and detection of APOA1 and SAA (serum amyloid A) by immunoblotting., Results: CSL112 infusion increased AER peaking at 2 hours and returning to baseline 24 hours post-infusion. AER correlated with cholesterol efflux capacity ( r =0.49), HDL-cholesterol ( r =0.30), APOA1 ( r =0.48), and phospholipids ( r =0.48; all P <0.001) over all time points. Mechanistically, changes in cholesterol efflux capacity and AER induced by CSL112 reflected HDL particle remodeling resulting in increased small HDL species that are highly active in mediating ABCA1 (ATP-binding cassette transporter 1)-dependent efflux, and large HDL species with high capacity for APOA1 exchange. The lipid-sensitive APOA1 reporter predominantly exchanged into SAA-poor HDL particles and weakly incorporated into SAA-enriched HDL species., Conclusions: Infusion of CSL112 enhances metrics of HDL functionality in patients with acute myocardial infarction. This study demonstrates that in post-acute myocardial infarction patients, HDL-APOA1 exchange involves specific SAA-poor HDL populations. Our data suggest that progressive enrichment of HDL with SAA may generate dysfunctional particles with impaired HDL-APOA1 exchange capacity, and that infusion of CSL112 improves the functional status of HDL with respect to HDL-APOA1 exchange., Registration: URL: https://www., Clinicaltrials: gov; Unique identifier: NCT02108262., Competing Interests: Disclosures B.A. Kingwell and E. Velkoska are employees of CSL Ltd; B.H. Greene, S.J. Mears; A.V. Navdaev, S.A. Didichenko, and S.D. Wright are employees of CSL Behring; S. Wang Lorkowski and J.D. Smith received research support from CSL for these studies; C. Michael Gibson received grant support and consulting fees from CSL Behring. Independent data access and analysis: S.A. Didichenko, D. Duffy, and B.A. Kingwell had full access to all the data in the study and took responsibility for its integrity and the data analysis.

Acute myocardial infarction (MI) patients remain at high risk for recurrent events. Cholesterol efflux, mediated by apolipoprotein A-I, removes excess cholesterol from atherosclerotic plaque and transports it to the liver for excretion. Impaired cholesterol efflux is associated with higher cardiovascular (CV) event rates among both patients with stable coronary artery disease and recent MI. CSL112, a novel intravenous formulation of apolipoprotein A-I (human) derived from human plasma, increases cholesterol efflux capacity. AEGIS-II is a phase 3, multicenter, double-blind, randomized, placebo-controlled, parallel-group trial investigating the efficacy and safety of CSL112 compared to placebo among high-risk acute MI participants. Eligibility criteria include age ≥ 18 years with type 1 (spontaneous) MI, evidence of multivessel stable coronary artery disease, and presence of diabetes requiring pharmacotherapy, or ≥2 of the following: age ≥ 65 years, prior MI, or peripheral artery disease. A target sample of 17,400 participants will be randomized 1:1 to receive 4 weekly infusions of CSL112 6 g or placebo, initiated prior to or on the day of discharge and within 5 days of first medical contact. The primary outcome is the time to first occurrence of the composite of CV death, MI, or stroke through 90 days. Key secondary outcomes include the total number of hospitalizations for coronary, cerebral, or peripheral ischemia through 90 days and time to first occurrence of the composite primary outcome through 180 and 365 days. AEGIS-II will be the first trial to formally test whether enhancing cholesterol efflux can reduce the rate of recurrent major adverse CV events., (Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.)