Universität zu Köln

Ritter, Christian, Bobylev, Ilja and Lehmann, Helmar C. (2015). Chronic inflammatory demyelinating polyneuropathy (CIDP): change of serum IgG dimer levels during treatment with intravenous immunoglobulins. J. Neuroinflamm., 12. LONDON: BMC. ISSN 1742-2094

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Abstract

Background: Intravenous immunoglobulin (IVIg) is an effective treatment in chronic inflammatory demyelinating polyneuropathy (CIDP). In most patients, the optimal IVIg dose and regime is unknown. Polyvalent immunoglobulin (Ig) G form idiotypic/anti-idiotypic antibody pairs in serum and IVIg preparations. We determined IgG dimer levels before and after IVIg treatment in CIDP patients with the aim to explore their utility to serve as a surrogate marker for treatment response. Methods: IgG was purified from serum of five controls without treatment, as well as from serum of 16 CIDP patients, two patients with Miller Fisher syndrome (MFS), and one patient with myasthenia gravis before and after treatment with IVIg. IgG dimer levels were determined by size exclusion chromatography. IgG dimer formation was correlated with clinical response to IVIg treatment in CIDP. Re-monomerized IgG dimer fractions were analyzed for immunoreactivity against peripheral nerve tissue. Results: IgG dimer levels were significantly higher in post-compared to pre-IVIg infusion samples. Low post-treatment IgG dimer levels in CIDP patients were associated with clinical worsening during IVIg treatment. Re-monomerized IgG dimer fractions from CIDP patients showed immunoreactivity against peripheral nerve tissue, whereas similarly treated samples from MFS patients showed immunoreactivity against GQ1b. Conclusion: Assessment of IgG dimer levels could be a novel approach to monitor CIDP patients during IVIg treatment, but further studies in larger cohorts are warranted to explore their utility to serve as a potential therapeutic biomarker for IVIg treatment response in CIDP.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ritter, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Bobylev, Ilja UNSPECIFIED UNSPECIFIED UNSPECIFIED Lehmann, Helmar C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-396451
DOI:	10.1186/s12974-015-0361-1
Journal or Publication Title:	J. Neuroinflamm.
Volume:	12
Date:	2015
Publisher:	BMC
Place of Publication:	LONDON
ISSN:	1742-2094
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ANTIIDIOTYPIC ANTIBODIES; IMMUNE GLOBULIN; THERAPEUTIC-USE; IDIOTYPE; POLYRADICULONEUROPATHY; EFFICACY; MODEL; AUTOANTIBODIES Multiple languages Immunology; Neurosciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39645