Peanut proteins and allergy severity in children
What it found
In 52 children with peanut allergy, levels of IgE antibodies to certain peanut proteins tracked with how severe their reactions were.
The strongest links were with Ara h 2 and Ara h 6.
What they found
Studies in people
Known allergens linked
IgE levels to Ara h 2 and Ara h 6 were strongly linked to peanut allergy severity. Ara h 1, Ara h 3, and Ara h 7 were also linked, but less strongly.
New allergen candidates
The study found seven peanut proteins that triggered IgE in more than five children. One of these, SBP65 (Ara h 20), was linked to allergy severity.
Annexin Gh1
24 of the 52 children (46.2%) had IgE antibodies to Annexin Gh1.
Combined IgE signal
The sum of IgE levels to all seven new candidates was strongly linked to allergy severity.
What the authors conclude
“Ara h 2- and 6-specific IgEs and sensitization diversity were the most significant factors that correlated with peanut allergy severity.”
Also in their conclusions
- They conclude that Ara h 2- and 6-specific IgEs and sensitization diversity were the most significant factors that correlated with peanut allergy severity.
- They identified SBP65 (Ara h 20) as a potential novel allergen component related to peanut allergy severity.
How it was done
The authors say the link between peanut allergy severity and IgE antibodies to specific peanut components is only partly understood. They wanted to explore this relationship.
They studied 52 children with peanut allergy confirmed by an oral food challenge test. They used lab methods to find peanut proteins and measured IgE antibodies to each one, then compared these with allergy severity.
What it can’t tell you
- We summarised it from the abstract only.
- This study measured links between IgE levels and allergy severity at one point in time. It cannot show that these antibodies cause more severe reactions.
- The findings are from 52 children and may not apply to all people with peanut allergy.
Who paid
- Authors work at
- Allergy and Immunology Center, Japan; Fujita Health University School of Medicine, Japan; General Research and Development Institute, Japan
The paper
- Title
- Exploration of severity-associated peanut allergens via proteomic analysis
- Type
- Study
- Evidence
- Studies in people
- Summarised from
- Abstract only
- Cite
- Matsui T, Shimojo N, Ishiguro T, et al (2025). Exploration of severity-associated peanut allergens via proteomic analysis. Pediatric allergy and immunology. doi:10.1111/pai.70254PubMed 41367265DOI
Summary written 26 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error