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Related Experiment Videos

Differences among available immunoglobulin preparations for intravenous use.

F Skvaril1, A Gardi

  • 1Institute for Clinical and Experimental Cancer Research, University of Berne, Switzerland.

The Pediatric Infectious Disease Journal
|May 1, 1988
PubMed
Summary

Intravenous immunoglobulin (IVIG) preparations vary based on manufacturing. Differences in enzymatic, chemical, or purification methods affect IgG subclass composition and function, impacting therapeutic efficacy.

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Area of Science:

  • Immunology
  • Biotechnology
  • Pharmacology

Background:

  • Intravenous immunoglobulin (IVIG) preparations are crucial therapeutics.
  • Current IVIG products meet basic intravenous administration requirements.
  • Manufacturing processes lead to significant variations in IVIG preparations.

Purpose of the Study:

  • To analyze the impact of different manufacturing methods on IVIG preparations.
  • To compare the properties of enzymatically treated, chemically modified, and anion-exchange purified IVIG.
  • To evaluate the subclass composition and functional characteristics of various IVIG products.

Main Methods:

  • Comparative analysis of IVIG preparations based on manufacturing techniques.
  • Assessment of IgG subclass composition (IgG1, IgG2, IgG3, IgG4).

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  • Evaluation of Fc-related functions, including Fc receptor interaction and phagocytosis-promoting activity.

    • Main Results:

    • Enzymatic treatment (pepsin, plasmin) reduces half-life and alters IgG subclass distribution.
    • Chemical modifications (beta-propiolactone) result in loss of IgG3 and altered Fc functions.
    • Anion-exchange purification leads to reduced IgG4 levels.
    • Non-modified US-marketed IVIGs (Gamimune N, Gammagard, Sandoglobulin) exhibit similar functional properties, except for IgG subclass representation.
    • No elevated levels of contaminants like prekallikrein activator or irregular anti-erythrocyte antibodies were found in these preparations.

    Conclusions:

    • Manufacturing methods significantly influence IVIG properties, particularly IgG subclass composition and function.
    • Understanding these differences is critical for selecting appropriate IVIG products for specific therapeutic needs.
    • Non-modified IVIG preparations generally maintain desirable functional characteristics, but subclass profiles vary.