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Related Experiment Videos

Allergen biodistribution in humans.

Marcello Bagnasco1, Silvia Morbelli, Vania Altrinetti

  • 1Allergy and Clinical Immunology Unit, Department of Internal Medicine, Genoa University, Genoa, Italy. allerlab@unige.it

Chemical Immunology and Allergy
|September 2, 2003
PubMed
Summary

Non-injectable immunotherapy, like oral or nasal routes, shows promise for allergy treatment. Most allergens are absorbed through the gut, but some remain at the mucosal site, aiding immunotherapy development.

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Area of Science:

  • Allergy and Immunology
  • Pharmacokinetics
  • Immunotherapy

Background:

  • Non-injectable immunotherapy (oral, nasal, oromucosal) has emerged in the last 20 years to mitigate side effects associated with injectable forms.
  • While clinical efficacy is documented, pharmacokinetic aspects require further elucidation.

Purpose of the Study:

  • To review experimental findings on the mucosal processing and biodistribution of allergens administered via non-injectable routes.
  • To understand the absorption and retention of allergens in healthy and allergic individuals.

Main Methods:

  • Utilized 123I-labelled major allergen of Parietaria judaica.
  • Administered allergen via sublingual and nasal routes in human subjects (healthy and allergic).
  • Tracked allergen processing, absorption, and biodistribution.

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Main Results:

  • Most allergen administered via mucosal routes is absorbed through the gastrointestinal tract.
  • A significant proportion of the allergen is retained at the mucosal level for an extended period.
  • Biodistribution patterns were observed in both healthy and allergic human subjects.

Conclusions:

  • Findings provide insights into the pharmacokinetic behavior of allergens in non-injectable immunotherapy.
  • Data can inform the optimization of immunotherapy treatment protocols using oral, nasal, or oromucosal routes.
  • Understanding allergen retention at mucosal sites is key for improving treatment efficacy.