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Jitprapaikulsan J, Fryer JP, Majed M, Smith CY, Jenkins SM, Cabre P, Hinson SR, Weinshenker BG, Mandrekar J, Chen JJ, Lucchinetti CF, Jiao Y, Segan J, Schmeling JE, Mills J, Flanagan EP, McKeon A, Pittock SJ. Clinical utility of AQP4-IgG titers and measures of complement-mediated cell killing in NMOSD. NEUROLOGY-NEUROIMMUNOLOGY & NEUROINFLAMMATION 2020; 7:7/4/e727. [PMID: 35413004 PMCID: PMC7286655 DOI: 10.1212/nxi.0000000000000727] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/15/2020] [Indexed: 11/15/2022]
Abstract
ObjectiveTo investigate whether aquaporin-4–immunoglobulin G (AQP4-IgG) titers and measures of complement-mediated cell killing are clinically useful to predict the occurrence of relapse, relapse severity, and/or disability in neuromyelitis optica spectrum disorder (NMOSD).MethodsWe studied 336 serial serum specimens from 82 AQP4-lgG–seropositive patients. NMOSD activity at blood draw was defined as preattack (24 [7.1%], drawn within 30 days preceding an attack), attack (108 [32.1%], drawn on attack onset or within 30 days after), or remission (199 [59.2%], drawn >90 days after attack onset and >30 days preceding a relapse). For each specimen, we documented the attack type and severity and immunotherapy status. Complement-mediated cell killing was quantitated by flow cytometry using an M23-AQP4 cell-based assay.ResultsThe estimated logarithmic means of AQP4-IgG titers in preattack, attack, and remission samples were 3.302, 3.657, and 3.458, respectively, p = 0.21. Analyses of 81 attack/remission pairs in 42 patients showed no significant titer differences (3.736 vs 3.472, p = 0.15). Analyses of 13 preattack/attack pairs in 9 patients showed no significant titer differences (3.994 vs 3.889, p = 0.67). Of 5 patients who converted to seronegative status, 2 continued to have attacks. Titers for major and minor attacks (n = 70) were not significantly different (3.905 vs 3.676, p = 0.47). Similarly, measures (titers) of complement-mediated cell killing were not significantly associated with disease course, attack severity, or disability at 5 years.Conclusions and relevanceAQP4-IgG titer and complement-mediated cell killing lack significant prognostic or predictive utility in NMOSD. Although titers may drop in the setting of immunotherapy, seroconversion to negative status does not preclude ongoing clinical attacks.Classification of evidenceThis study provides Class II evidence that in patients with NMOSD, AQP4-IgG titers and measures of complement-mediated cell killing activity do not predict relapses, relapse severity, or disability.
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Affiliation(s)
- Jiraporn Jitprapaikulsan
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - James P Fryer
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Masoud Majed
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Carin Y Smith
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Sarah M Jenkins
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Philippe Cabre
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Shannon R Hinson
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Brian G Weinshenker
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Jay Mandrekar
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - John J Chen
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Claudia F Lucchinetti
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Yujuan Jiao
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Jessica Segan
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - John E Schmeling
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - John Mills
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Eoin P Flanagan
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Andrew McKeon
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN
| | - Sean J Pittock
- From the Departments of Neurology (J.J., M.M., B.G.W., C.F.L., Y.J., E.P.F., A.M., S.J.P.), Laboratory Medicine and Pathology (J.J., J.P.F., S.R.H., J.E.S., J. Mills, A.M., S.J.P.), Health Sciences Research (C.Y.S., S.M.J., J. Mandrekar), Mayo Clinic, Rochester, MN; Department of Neurology (P.C.), Fort-de-France University Hospital Center, Pierre Zobda Quitman Hospital, Martinique; Center for MS and Autoimmune Neurology (B.G.W., J.J.C., C.F.L., J. S., J. Mills, E.P.F., A.M., S.J.P.), and Department of Ophthalmology (J.J.C.), Mayo Clinic, Rochester, MN.
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