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Circulating immune complexes in serum and in cerebrospinal fluid of patients with multiple sclerosis
Authors:S. Procaccia  D. Lanzanova  D. Caputo  P. Ferrante  E. Papini  A. Gasparini  A. Colucci  M. Bianchi  P. Villa  R. Blasio  M. Froldi  C. Zanussi
Affiliation:Institute of Medicine, University of Milan Medical School, Italy.
Abstract:We studied circulating immune complexes (IC) in the serum and cerebrospinal fluid (CSF) of patients with clinically defined multiple sclerosis (MS), in order to establish a correlation with the clinical course of the disease and to investigate the molecular composition of the IC isolated from patients in active phase of the disease. Serum IC levels were found to be significantly increased in patients from the progressive and active relapsing-remittent subgroups with both the CIC-conglutinin and C1q-binding methods. High levels of IC in CSF were detected only in the subgroup consisting of the relapsing-remittent patients in disease exacerbation when IC were determined by the C1q-binding test. No significant increase in serum or in CSF were found using the mRF-I test. The preliminary results of a qualitative investigation on serum IC in MS indicated that they are heterogeneous in nature, their size is mainly of the intermediate type, and they contain IgG, IgM, complement components and beta 2-microglobulins, the latter presenting an observation both new and interesting for studies on serum IC in MS patients.
Keywords:immune complexes    multiple sclerosis    clinical correlation    characterization
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