Miedema J, Schreurs M, van der Sar-van der Brugge S, Paats M, Baart S, Bakker M, Hoek R, Dik WA, Endeman H, Van Der Velden V, van Gammeren A, Ermens A, Aerts JG, and Thüsen JV
Background: Lung histopathology demonstrates vasculopathy in a subset of deceased COVID19 patients, which resembles histopathology observed in antibody-mediated lung transplant rejection. Autoantibodies against angiotensin II type 1 receptor (AT1R) and Endothelin receptor Type A (ETAR) have been demonstrated in antibody-mediated rejection and may also be associated with severe COVID19 infection. Objective To assess AT1R and ETAR auto-antibodies in COVID19 patients and controls, and explore their association with disease course., Methods: 65 hospitalized patients with COVID19 infection were included. Clinical and laboratory findings were retrospectively assessed. Patients with unfavorable disease course, admitted at the intensive care unit and/or deceased during hospital admission (n=33) were compared to admitted COVID19 patients with favorable disease course (n=32). The presence of antinuclear antibodies (ANA) and auto-antibodies against AT1R or ETAR in peripheral blood were compared between COVID19 with unfavorable and favorable disease course and age matched controls (n=20)., Results: The presence of ANA was not significantly different between COVID19 patients with unfavorable (n=7/33; 21%) and favorable disease course (n=6/32; 19%) (p= 0.804) and controls (n=3/20; 15%). Auto-antibodies against AT1R were significantly increased in unfavorable disease course (median 14.59 U/mL, IQR 11.28 - 19.89) compared to favorable disease course (median 10.67 U/mL, IQR 8.55 - 13.0, p< 0.01). ETAR antibody titers were also significantly increased in unfavorable disease course (median 7.21, IQR 5.0 - 10.45) as compared to favorable disease course (median 4.0, IQR 3.0 - 6.0, p <0.05)., Conclusion: Auto-antibodies against AT1R and ETAR are significantly increased in COVID19 patients with an unfavorable disease course., Competing Interests: JM reports personal fees from Boehringer Ingelheim, Roche and Chiesi, all outside the submitted work. SS-B reports personal fees from Astra Zeneca, Chiesi, ALK, Novartis, GSK, all outside the submitted work. JA reports personal fees and non-financial support from MSD, personal fees from BMS, Boehringer Ingelheim, Amphera, Eli-Lilly, Takeda, Bayer, Roche, Astra Zeneca, all outside the submitted work. In addition, JA has a patent allogenic tumor cell lysate licensed to amphera, a patent combination immunotherapy in cancer pending, and a patent biomarker for immunotherapy pending (all outside submitted work) JV reports grants from ZonMW, during the conduct of the study. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Miedema, Schreurs, van der Sar – van der Brugge, Paats, Baart, Bakker, Hoek, Dik, Endeman, Van Der Velden, van Gammeren, Ermens, Aerts and Thüsen.)