RT Journal Article T1 Rituximab in treatment-resistant CIDP with antibodies against paranodal proteins. A1 Querol, Luis A1 Rojas-García, Ricard A1 Diaz-Manera, Jordi A1 Barcena, Joseba A1 Pardo, Julio A1 Ortega-Moreno, Angel A1 Sedano, Maria Jose A1 Seró-Ballesteros, Laia A1 Carvajal, Alejandra A1 Ortiz, Nicolau A1 Gallardo, Eduard A1 Illa, Isabel K1 Corticoesteroides K1 Anticuerpos K1 Anticuerpos monoclonales de origen murino K1 Autoanticuerpos K1 Contactina 1 K1 Ensayo de inmunoadsorción enzimática K1 Humanos K1 Inmunoglobulina G K1 Inmunoglobulinas intravenosas K1 Inmunohistoquímica K1 Perdida de seguimiento K1 Polirradiculoneuropatía crónica inflamatoria desmielinizante K1 Accidente cerebrovascular AB OBJECTIVETo describe the response to rituximab in patients with treatment-resistant chronic inflammatory demyelinating polyneuropathy (CIDP) with antibodies against paranodal proteins and correlate the response with autoantibody titers.METHODSPatients with CIDP and IgG4 anti-contactin-1 (CNTN1) or anti-neurofascin-155 (NF155) antibodies who were resistant to IV immunoglobulin and corticosteroids were treated with rituximab and followed prospectively. Immunocytochemistry was used to detect anti-CNTN1 and anti-NF155 antibodies and ELISA with human recombinant CNTN1 and NF155 proteins was used to determine antibody titers.RESULTSTwo patients had a marked improvement; another patient improved slightly after 10 years of stable, severe disease; and the fourth patient had an ischemic stroke unrelated to treatment and was lost to follow-up. Autoantibodies decreased in all patients after rituximab treatment.CONCLUSIONSRituximab treatment is an option for patients with CIDP with IgG4 anti-CNTN1/NF155 antibodies who are resistant to conventional therapies.CLASSIFICATION OF EVIDENCEThis study provides Class IV evidence that rituximab is effective for patients with treatment-resistant CIDP with IgG4 anti-CNTN1 or anti-NF155 antibodies. PB Wolters Kluwer Health/LWW YR 2015 FD 2015-09-03 LK http://hdl.handle.net/10668/2063 UL http://hdl.handle.net/10668/2063 LA en NO Querol L, Rojas-García R, Diaz-Manera J, Barcena J, Pardo J, Ortega-Moreno A, et al. Rituximab in treatment-resistant CIDP with antibodies against paranodal proteins. Neurol Neuroimmunol Neuroinflamm. 2015; 2(5):e149 NO Journal Article; DS RISalud RD Apr 4, 2025