Cited 49 times since 2013 (4 per year) source: EuropePMC Journal of neurology, neurosurgery, and psychiatry, Volume 84, Issue 8, 28 4 2013, Pages 859-861 Serum IgG levels in IV immunoglobulin treated chronic inflammatory demyelinating polyneuropathy. Kuitwaard K, van Doorn PA, Vermeulen M, van den Berg LH, Brusse E, van der Kooi AJ, van der Pol WL, van Schaik IN, Notermans N, Tio-Gillen AP, van Rijs W, van Gelder T, Jacobs BC
Objective
To determine the variability of serum IgG in patients with chronic inflammatory demyelinating polyneuropathy (CIDP).
Methods
All 25 CIDP patients had active but stable disease and were treated with individually optimised fixed dose IVIg regimens. IgG was measured by turbidimetry and variability was defined as coefficient of variation (CV).
Results
The intra-patient variability of the pre-treatment IgG levels, post-treatment levels and increase in serum IgG shortly after IVIg (ΔIgG) was low (mean CV=3%, 4%, 10%). The inter-patient variability between patients treated with the same dose and interval was low in pre-treatment, post-treatment and ΔIgG level (mean CV=13%, 11%, 20%). The ΔIgG levels were associated with IVIg dosage (rs=0.78, p<0.001).
Conclusions
Clinically stable CIDP patients show a steady-state in serum IgG after serial IVIg infusions. The low intra- and inter-patient variability in IgG may indicate that constant levels are required to reach this stability.
