Neurology(R) neuroimmunology & neuroinflammation · 2026
Aberrant Complement Activation Is a Prominent Feature of Chronic Inflammatory Demyelinating Polyneuropathy.
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Stascheit Frauke, Preßler Hannah, Stein Kerstin, Pernice Helena Franziska, Hahn Katrin, Meisel Andreas, Lünemann Jan D
Аннотация
OBJECTIVES: To comprehensively characterize complement pathway activation in chronic inflammatory demyelinating polyneuropathy (CIDP) and its association with clinical disease features using advanced complement profiling.
METHODS: Complement protein levels indicative of classical, lectin, and alternative pathway activation were quantified by multiplex ELISA and compared between 28 patients with typical CIDP, 24 patients with Charcot-Marie Tooth neuropathy (CMT), and 24 demographically matched healthy controls (HD).
RESULTS: Serum levels of activated complement proteins-C3a, C4a, Ba, Bb, C5a, and the soluble terminal complement complex sC5b-9 (sTCC)-were significantly elevated in CIDP patients compared to healthy donors (HD) (p < 0.001). Except for C3a, these protein levels were also significantly higher in CIDP patients than in those with Charcot-Marie-Tooth disease (CMT). Among CIDP patients, those with active, unstable disease exhibited significantly higher levels of terminal complement components (C5a and sTCC) compared to patients with stable disease or in remission (p < 0.001).
DISCUSSION: These findings highlight the critical involvement of aberrant complement activation in the pathophysiology of CIDP and provide a rationale for further investigation into targeted complement inhibition as a therapeutic approach.
METHODS: Complement protein levels indicative of classical, lectin, and alternative pathway activation were quantified by multiplex ELISA and compared between 28 patients with typical CIDP, 24 patients with Charcot-Marie Tooth neuropathy (CMT), and 24 demographically matched healthy controls (HD).
RESULTS: Serum levels of activated complement proteins-C3a, C4a, Ba, Bb, C5a, and the soluble terminal complement complex sC5b-9 (sTCC)-were significantly elevated in CIDP patients compared to healthy donors (HD) (p < 0.001). Except for C3a, these protein levels were also significantly higher in CIDP patients than in those with Charcot-Marie-Tooth disease (CMT). Among CIDP patients, those with active, unstable disease exhibited significantly higher levels of terminal complement components (C5a and sTCC) compared to patients with stable disease or in remission (p < 0.001).
DISCUSSION: These findings highlight the critical involvement of aberrant complement activation in the pathophysiology of CIDP and provide a rationale for further investigation into targeted complement inhibition as a therapeutic approach.