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Immunoadsorption therapy and complement activation.

J Pták1, J Lochman

  • 1Blood Center of University Hospital, 17 listopadu 833, 708 52 Ostrava-Poruba, Czech Republic. jan.ptak@fnspo.cz

Transfusion and Apheresis Science : Official Journal of the World Apheresis Association : Official Journal of the European Society for Haemapheresis
|June 10, 2005
PubMed
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Immunoadsorption therapy for myasthenia gravis activates the complement system, indicated by C3, C4, CH50, and TCC changes. Long-term treatment may lead to reduced complement activation, suggesting an immunomodulatory effect.

Area of Science:

  • Immunology
  • Neurology

Background:

  • Myasthenia gravis is an autoimmune disorder affecting neuromuscular junctions.
  • Immunoadsorption therapy is used to treat myasthenia gravis by removing pathogenic antibodies.

Purpose of the Study:

  • To investigate complement activation during immunoadsorption therapy for myasthenia gravis.
  • To assess the impact of long-term immunoadsorption on complement system reactivity.

Main Methods:

  • Studied complement activation markers (C3, C4, CH50, TCC) in six myasthenia gravis patients undergoing immunoadsorption therapy (Ig-ADSOPAK).
  • Analyzed complement levels before and after each procedure over a mean therapy duration of 18.6 months.

Main Results:

  • Immunoadsorption caused a decrease in C3 and C4 levels (median 21.19% and 19.68%).

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  • Statistically significant complement activation was observed, with median TCC accrual of 60.21% and CH50 decrease of 23.24%.
  • No clinical signs of complement activation were noted. A decrease in TCC activation was observed with increasing procedures, significant in 3/5 patients.

    • Conclusions:

    • Immunoadsorption therapy for myasthenia gravis transiently activates the complement system.
    • Long-term therapy may induce an immunomodulatory effect, leading to reduced complement system reactivity.
    • Further studies with larger patient cohorts are needed to confirm these findings.