Skin prick test reactivity to recombinant latex allergens

Area of Science:

• Immunology
• Allergology
• Biotechnology

Background:

• Latex allergy is a growing health concern, especially for healthcare workers.
• Current diagnostic methods for latex allergy include in vitro tests and skin prick tests (SPT) using natural rubber latex (NRL).
• Ten latex allergens (Hev b 1-10) have been identified, with most cloned as recombinant proteins for research.

Purpose of the Study:

• To compare the SPT reactivity of six recombinant latex allergens.
• To assess the diagnostic potential of these recombinant allergens against natural rubber latex proteins.

Main Methods:

• Six recombinant latex allergens were expressed and tested via skin prick testing in 31 latex-allergic individuals.
• Serial dilutions of recombinant allergens were used to determine reactivity levels.
• Latex-specific IgE levels were measured using the AlaSTAT assay.

Main Results:

• All six recombinant allergens demonstrated SPT reactivity in latex-allergic patients but not in controls.
• The frequency of sensitization to recombinant allergens mirrored previous findings with native NRL proteins.
• A combination of Hev b 5, 6, and 7 recombinant allergens diagnosed latex allergy with 93% sensitivity and 100% specificity.

Conclusions:

• Recombinant latex allergens are clinically reactive and suitable for diagnostic use.
• These allergens can be produced in a standardized manner.
• Recombinant allergens offer a potentially safe, sensitive, and specific approach for diagnosing latex allergy.