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Related Experiment Videos

Stability studies on horse antithymocyte globulin.

A J Parcells, H Ko, M E Royer

    Transplantation
    |February 1, 1977
    PubMed
    Summary
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    Equine antithymocyte globulin (eATG) stored at 4°C for 48 months retained rosette inhibition activity. Storage at 25°C led to activity loss, but immunosuppressive function remained stable over one year.

    Area of Science:

    • Immunology
    • Pharmacology
    • Veterinary Medicine

    Background:

    • Equine antithymocyte globulin (eATG) is a polyclonal antibody preparation used for immunosuppression.
    • Understanding eATG stability is crucial for its therapeutic efficacy and storage guidelines.

    Purpose of the Study:

    • To evaluate the impact of storage temperature on the stability and activity of equine antithymocyte globulin (eATG).
    • To assess the long-term immunosuppressive activity of eATG using both in vitro and in vivo models.

    Main Methods:

    • Two eATG preparations were tested for rosette inhibition activity after storage at 4°C and 25°C.
    • A third eATG preparation was assessed for immunosuppressive activity via monkey skin graft prolongation and rosette inhibition assay over one year.

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    Main Results:

    • eATG stored at 4°C for 48 months showed no loss in rosette inhibition activity.
    • Storage at 25°C resulted in eATG fragmentation and loss of rosette inhibition activity.
    • No loss of immunosuppressive activity was observed for eATG over a one-year period using monkey skin graft prolongation and rosette inhibition assays.

    Conclusions:

    • Cold storage (4°C) is optimal for maintaining eATG activity over extended periods.
    • Warmer temperatures (25°C) compromise eATG's rosette inhibition capacity.
    • eATG demonstrates stable immunosuppressive function over one year, irrespective of initial storage conditions tested.