Antibodies to nodal/paranodal proteins in paediatric immune-mediated neuropathy
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- Desiree De Simoni, MD,
- Gerda Ricken, MSc,
- Michael Winklehner, MD,
- Inga Koneczny, PhD,
- Michael Karenfort, MD,
- Ulf Hustedt, MD,
- Ulrich Seidel, MD,
- Omar Abdel-Mannan, MD,
- Pinki Munot, MD,
- Simon Rinaldi, MD,
- Claudia Steen, MD,
- Michael Freilinger, MD,
- Markus Breu, MD,
- Rainer Seidl, MD,
- Markus Reindl, PhD,
- Julia Wanschitz, MD,
- Cinta Lleixà, PhD,
- Günther Bernert, MD,
- Klaus-Peter Wandinger, MD, PhD,
- Ralf Junker, MD,
- Luis Querol, MD, PhD,
- Frank Leypoldt, MD, PhD,
- Kevin Rostásy, MD* and
- Romana Höftberger, MD*
- From the Division of Neuropathology and Neurochemistry (D.D.S., G.R., M.W., I.K., R.H.), Department of Neurology, Medical University of Vienna, Austria; Department of Neurology (D.D.S.), University Hospital St. Poelten, Austria; Department of General Pediatrics, Neonatology and Pediatric Cardiology (M.K.), University Children's Hospital, Heinrich Heine University Duesseldorf, Germany; Department of Neuropediatric Rehabilitation (U.H.), Vamed Clinic Hattingen, Germany; Department of Neuropediatrics (U.S.), Charité University, Berlin, Germany; Paediatric Neurology (O.A.-M.), Great Ormond Street Hospital for Children, London, United Kingdom; Dubowitz Neuromuscular Centre (P.M.), Great Ormond Street Hospital for Children, London, United Kingdom; Nuffield Department of Clinical Neurosciences (S.R.), University of Oxford and Oxford University Hospitals NHS Foundation Trust; Department of Paediatric and Adolescent Medicine (C.S.), St Joseph Hospital, Berlin, Germany; Department of Pediatrics and Adolescent Medicine (M.F., M.B., R.S.), Medical University of Vienna, Austria; Department of Neurology (M.R., J.W.), Medical University of Innsbruck, Austria; Neuromuscular Diseases Unit (C.L., L.Q.), Hospital de la Santa Creu i Sant Pau, Universitat Autónoma de Barcelona, Spain; SMZ Süd (G.B.), Kaiser-Franz Josef Hospital with Gottfried von Preyer Children Hospital, Vienna, Austria; Institute of Clinical Chemistry (K.-P.W., R.J., F.L.), University Hospital Schleswig-Holstein, Kiel/Lübeck, Germany; Department of Neurology (F.L.), University Hospital Schleswig-Holstein, Kiel, Germany; and Department of Pediatric Neurology (K.R.), Witten/Herdecke University, Children's Hospital Datteln, Germany.
- Correspondence
Dr. Rostásy k.rostasy{at}kinderklinik-datteln.de or Dr. Höftberger romana.hoeftberger{at}meduniwien.ac.at
Patients with nodal/paranodal antibodies represent a specific subgroup of inflammatory peripheral neuropathies, whose clinical presentation with a prolonged subacute phase, additional symptoms such as ataxia and tremor, and poor treatment response to IV immunoglobulin (IVIG) often differs from classic Guillain-Barré syndrome (GBS) or chronic inflammatory demyelinating polyneuropathy (CIDP).1
Previous studies on nodo/paranodopathies mainly focused on adult patients, whereas the clinical spectrum of pediatric patients is less well established. We reviewed the clinical presentation of 54 children with GBS (n = 42) and CIDP (n = 12) and retrospectively screened for antibodies against neurofascin155 (NF155), NF186, NF140, contactin-1 (CNTN1), contactin-associated protein1 (CASPR1), and glycine-receptor (GlyR) using cell-based assays2,3; 1 patient was additionally tested with CNTN1-ELISA.4 All cases with sufficient serum were tested for ganglioside-IgG-, IgA-, and IgM-antibodies against GM1 (n = 42), GD1a (n = 18), GD1b (n = 23), and GQ1b (n = 21).5 Clinical and paraclinical information of all patients is summarized in the table. The study was approved by the ethics committee (EK1773/2016).
Children with classic GBS
Of 42 children with GBS, 26 were classified as acute inflammatory demyelinating polyneuropathy (AIDP), 7 as acute motor/motor-sensory axonal neuropathy (AMAN/AMSAN) by nerve conduction velocity according to Hadden criteria,6 4 as Miller-Fisher syndrome (MFS), and 2 as MFS/GBS overlap. Three patients with GBS could not be classified because of lack of nerve-conduction studies. In 25 of 35 patients (71.4%), an infection was reported within 4 weeks before symptom onset (13 gastrointestinal, 4 respiratory, and 8 unspecified). Eight patients had IgG-ganglioside antibodies (19.0%), 6 IgM (14.2%), and 1 IgA (2.4%). Nodal/paranodal antibodies were not detected. Patients with AMAN/AMSAN (5/7 with reported infection: 1 campylobacter jejuni, 1 varicella-zoster virus, and 3 unspecified) were more often ganglioside antibody positive (6/7) than patients with AIDP (4/26; likelihood ratio 12.419) or MFS (2/4).
Children with nodal/paranodal antibodies
Five of 12 children, who met the EFNS/PNS criteria for CIDP, had nodal/paranodal antibodies: 2 pan-neurofascin (NF155/NF186/140 triple positive), 1 NF155, and 2 CNTN1-antibodies. The IgG-subclass distribution was determined by flow cytometry analysis.7 IgG4 was the predominant subclass in all patients and ranged from 75% to 100%. In addition, 1 patient with pan-neurofascin-antibodies tested positive for GlyR-antibodies but did not develop stiff-person syndrome or progressive encephalomyelitis with rigidity, and the significance of this finding needs further investigation. The mean age was 7.9 years (range 3–11), and the male:female ratio was 3:2. The median duration of hospitalization was 13 days (range 2–28). One pan-neurofascin-patient was initially diagnosed as GBS and reclassified as CIDP during disease course, the other patients had a chronic onset with slow progression over months or years. One child had a gastrointestinal infection before symptom onset. One CNTN1-patient showed cranial nerve involvement and optic neuritis during disease course. All children had ataxia, 4 neuropathic pain (all except 1 pan-neurofascin), and 3 (2 CNTN1, and 1 pan-neurofascin) tremor. At the peak of disease, 3 children needed a walking aid (Hughes 3) and 2 were bedridden (Hughes 4). None of the children had renal dysfunction. The mean CSF white cell count was 4.6 μL (range 0–21), and the mean CSF protein was 292.4 mg/dL (range 75–619).
The mean time of follow-up was 32 months (range 17–57). The 2 CIDP patients with pan-neurofascin-antibodies initially showed no or only partial response to IVIG and therefore received corticosteroids, 1 along with plasma exchange and the other with mycophenolate. Both recovered only very slowly over up to 4 years with a modified Rankin Scale (mRS) score of 1 at the last follow-up. The NF155-patient did not respond to IVIG and corticosteroids and subsequently received immunoadsorption and rituximab, leading to significant clinical improvement. After 8 months, he relapsed in association with normalization of the CD19/20 ratio and again rapidly improved after another dose of rituximab, with a mRS score of 2 at the last follow-up. One patient with CNTN1-antibodies worsened despite monthly IVIG and corticosteroids given over 4 months. After treatment was switched to rituximab, he improved rapidly in the following weeks and remained stable since then. The second child with CNTN1-antibodies showed only partial response to IVIG with relapses in conjunction with infections. This child improved significantly after rituximab application with a mRS score of 2 at the last follow-up.
In summary, our study demonstrates that nodal/paranodal antibodies occur in a subgroup of paediatric patients with CIDP, but not GBS. Children with AMAN/AMSAN frequently have ganglioside antibodies. Children with CIDP and atypical/prolonged disease course with high Hughes score (>2), sensory ataxia, prominent neuropathic pain, and tremor may have nodal/paranodal antibodies. These patients often do not sufficiently respond to IVIG, whereas in our case series, rituximab led to prompt improvement in 3 children. Optimal treatment strategies for children with nodal/paranodal antibodies have to be further determined in larger studies.
Study funding
This work was partly supported by grants from the “Jubiläumsfonds der Österreichischen Nationalbank,” project 16919 (R. Höftberger), the GBS/CIDP Foundation International (J. Wanschitz), Austrian Science Fund FWF, DOC 33-B27 (R. Höftberger, M. Winklehner) and I3334-B27 (R. Höftberger), Hertha Firnberg project number T996-B30 (I. Koneczny), the PI16/000627 grant of the Fondo de Investigaciones Sanitarias—Instituto de Salud Carlos III (fondos FEDER) (L. Querol), personal grant SLT006/17/00131 of the Pla estratègic de Recerca i Innovació en Salut (PERIS), Departament de Salut, Generalitat de Catalunya (L. Querol), and the German Ministry of Education and Research (BMBF, 01 GM1908A).
Disclosure
D. De Simoni, G. Ricken, M. Winklehner, I. Koneczny, M. Karenfort, U. Hustedt, U. Seidel, O. Abdel-Mannan, P. Munot, S. Rinaldi, C. Steen, M. Freilinger, M. Breu, R. Seidl, M. Reindl, J. Wanschitz, C. Lleixá, G. Bernert, K.P. Wandinger, R. Junker, L. Querol, F. Leypoldt, K. Rostásy, and R. Höftberger report no disclosures relevant to the manuscript. Go to Neurology.org/NN for full disclosures.
Acknowledgment
The authors thank Valerie Pichler and Sopie Dürauer for technical assistance and Andreas Spittler from the Flow Cytometry Core facility of the MUV for technical support.
Appendix Authors
Footnotes
Go to Neurology.org/NN for full disclosures. Funding information is provided at the end of the article.
↵* These authors contributed equally to this work.
The Article Processing Charge was funded by Austrian Science Fund.
- Received March 8, 2020.
- Accepted in final form April 29, 2020.
- Copyright © 2020 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology.
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Stock/Stock Options/Board of Directors Compensation:NONE
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Royalty Payments, Technology or Inventions:NONE
Stock/Stock Options, Research Sponsor:NONE
Stock/Stock Options, Medical Equipment & Materials:NONE
Legal Proceedings:NONE
NONE
Gifts:Scientific adviser on Fingolimod project-Novartis
Funding for Travel or Speaker Honoraria:NONE
Editorial Boards:Advisory Board Meeting Novartis and Merck 2017, 2018
Patents:NONE
Publishing Royalties:NONE
Employment, Commercial Entity:NONE
Consultancies:NONE
Speakers' Bureaus:NONE
Other Activities:NONE
Clinical Procedures or Imaging Studies:NONE
Research Support, Commercial Entities:NONE
Research Support, Government Entities:NONE
Research Support, Academic Entities:NONE
Research Support, Foundations and Societies:NONE
Stock/Stock Options/Board of Directors Compensation:NONE
License Fee Payments, Technology or Inventions:NONE
Royalty Payments, Technology or Inventions:NONE
Stock/Stock Options, Research Sponsor:NONE
Stock/Stock Options, Medical Equipment & Materials:NONE
Legal Proceedings:NONE
NONE
Gifts:NONE
Funding for Travel or Speaker Honoraria:NONE
Editorial Boards:NONE
Patents:NONE
Publishing Royalties:NONE
Employment, Commercial Entity:NONE
Consultancies:NONE
Speakers' Bureaus:NONE
Other Activities:NONE
Clinical Procedures or Imaging Studies:NONE
Research Support, Commercial Entities:NONE
Research Support, Government Entities:NONE
Research Support, Academic Entities:NONE
Research Support, Foundations and Societies:NONE
Stock/Stock Options/Board of Directors Compensation:NONE
License Fee Payments, Technology or Inventions:NONE
Royalty Payments, Technology or Inventions:NONE
Stock/Stock Options, Research Sponsor:NONE
Stock/Stock Options, Medical Equipment & Materials:NONE
Legal Proceedings:NONE
NONE