New studies are making headway in the pursuit of cures for both eczema and food allergies, and it turns out the two are related.
Infants with eczema are at high risk of having peanut and other food allergies, British researchers report.
"We were shocked to find out that even in the first year of life, over 20% of infants with eczema already were sensitized [showed susceptibility] to peanut allergy," says Graham Roberts, MD, a pediatric allergist at King's College London.
Roberts tells WebMD that by the time they enter school, children with eczema have a high rate of peanut allergies.
"But we didn't know how early the peanut allergy started; we thought may at 3, 4, or 5 years of age," he says.
The new research suggests peanut allergy develop much earlier, Roberts says.
The study involved 640 infants aged 4-11 months with eczema.
The researchers measured blood levels of immunoglobulin E (IgE), an immune system protein the body makes in response to allergens. A positive result means a person is sensitive to and likely to be allergic to a certain food.
The results showed:
- 23% of the infants were sensitive to peanuts.
- 31% were sensitive to cow's milk.
- 22% were sensitive to sesame.
- 16% were sensitive to Brazil nuts.
- 20% were sensitive to hazel nuts.
- 21% were sensitive to cashews.
- 14% were sensitive to almonds.
Sixteen percent of the infants tested positive for more than four foods.
Roberts says this is the first step in an ongoing study designed to test the hypothesis that giving infants foods to which they are sensitized will prevent allergies later in life.
The hypothesis is supported by the fact that Jewish children in London are about 10 times more likely to have peanut allergies than Israeli children "and one of the biggest differences is that kids in Israel are introduced to [peanuts] early in life," says Hugh Sampson, MD, professor of pediatrics, allergy and immunology at Mt. Sinai School of Medicine in New York.
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A daily dose of peanut powder could help some children who are allergic to peanuts, according to a pair of U.S. studies that confirm earlier findings, offering hope that a treatment could come soon.
In one study, teams at Duke University in North Carolina and the University of Arkansas for Medical Sciences gave 15 children tiny, but increasing, doses of peanut powder and compared them with eight children who got a placebo.
At the end of the year-long study, children given the treatment were on average able to tolerate 15 peanuts before having an allergic reaction.
"We started out literally at about a one-thousandth of a peanut and built that up over time," Dr. Wesley Burks of Duke, who helped lead the study, said in a telephone interview.
In the second study, 12 children treated with peanut powder from age 32 months to 5 years old were monitored to see whether they could safely eat peanuts after the daily treatment stopped. The children were off the treatment for a month before they were given peanuts.
Nine of the 12 now have peanuts in their diets, the researchers reported at a meeting of the American Academy of Allergy, Asthma & Immunology in New Orleans.
The research builds on previous studies, in which children were able to tolerate the treatment for more than two years and four appeared to be freed of their peanut allergies.
Burks said the results are encouraging but more research is needed before an effective treatment can be developed.
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