Biomarker: F010-IgE Sesame Seed

Overview

F010-IgE Sesame Seed measures immunoglobulin E (IgE) antibodies in blood that recognize sesame seed proteins. IgE is involved in immediate-type allergic reactions, including hives, gastrointestinal symptoms, respiratory symptoms, and anaphylaxis. A detectable or elevated result indicates sensitization to sesame but does not by itself confirm clinical sesame allergy or predict reaction severity. The test is clinically useful when interpreted with the patient’s history, other allergy testing, and, when appropriate, a medically supervised oral food challenge.

Clinical Use Cases

Supports evaluation of suspected IgE-mediated sesame seed allergy.
Helps assess sensitization when a patient has had symptoms after eating sesame or sesame-containing foods.
May be used when skin prick testing is impractical, unsafe, or affected by skin disease or medications.
Helps guide consideration of a supervised oral food challenge when the clinical history and test results are uncertain.
May be combined with sesame component testing, particularly Ses i 1-specific IgE, to provide additional diagnostic information.
Supports research on the relationship between sesame-specific IgE, component-specific IgE, and clinical reactions.

Specimen Types

Venous blood, typically analyzed as serum.
Plasma may be accepted by some assay systems, according to the testing laboratory’s validated requirements.

Measurement Methods

Automated allergen-specific IgE immunoassays, including fluorescence-based immunoassays such as ImmunoCAP.
Enzyme-linked immunosorbent assays (ELISA).
Multiplex allergen microarray methods for component-specific IgE, such as Ses i 1.
Skin prick testing with sesame extract or fresh sesame is a separate method for detecting sensitization and is not the same as serum F010-IgE measurement.

Test Preparation and Influencing Factors

Fasting is generally not required for a standalone sesame-specific IgE blood test.
Antihistamines generally do not interfere with serum-specific IgE measurement, although they can suppress skin prick test responses.
Do not stop prescription or over-the-counter medicines unless instructed by a health care professional.
Report medications, supplements, recent allergic reactions, and relevant medical conditions to the ordering clinician.
Testing should be guided by an allergy-focused clinical history rather than broad, indiscriminate food panels.
Recent exposure to sesame is not usually required before blood collection.
Results can indicate sensitization without proving that eating sesame causes symptoms. They should not be used alone to determine whether a patient has a clinical allergy or how severe a future reaction may be.
Total IgE concentration, age, assay characteristics, and the patient’s clinical history may affect interpretation.
A medically supervised oral food challenge remains the reference standard when the diagnosis is uncertain.