The adsorption of allergoids and 3-O-desacyl-4'-monophosphoryl lipid A (MPL®) to microcrystalline tyrosine (MCT) in formulations for use in allergy immunotherapy

Journal of Inorganic Biochemistry
A J BellM A Skinner

Abstract

Infectious disease vaccine potency is affected by antigen adjuvant adsorption. WHO and EMA guidelines recommend limits and experimental monitoring of adsorption in vaccines and allergy immunotherapies. Adsorbed allergoids and MPL® in MATA-MPL allergy immunotherapy formulations effectively treat IgE mitigated allergy. Understanding vaccine antigen adjuvant adsorption allows optimisation of potency and should be seen as good practice; however current understanding is seldom applied to allergy immunotherapies. The allergoid and MPL® adsorption to MCT in MATA-MPL allergy immunotherapy formulations was experimental determination using specific allergen IgE allerginicity and MPL® content methods. Binding forces between MPL® and MCT were investigated by competition binding experiments. MATA-MPL samples with different allergoids gave results within 100-104% of the theoretical 50μg/mL MPL® content. Unmodified drug substance samples showed significant desirable IgE antigenicity, 1040-170 QAU/mL. MATA-MPL supernatant samples with different allergoids gave results of ≤2 μg/mL MPL® and ≤0.1-1.4 QAU/mL IgE antigenicity, demonstrating approximately ≥96 & 99% adsorption respectively. Allergoid and MPL® adsorption in different MATA-MPL allergy ...Continue Reading

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Citations

Feb 7, 2017·Expert Review of Clinical Immunology·Ludger KlimekMatthew D Heath
Mar 30, 2018·The Journal of Immunology : Official Journal of the American Association of Immunologists·Deborah S LeuthardPål Johansen
May 22, 2020·Pediatric Allergy and Immunology : Official Publication of the European Society of Pediatric Allergy and Immunology·Montserrat Alvaro-LozanoMarta Vazquez-Ortiz

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