A new study has offered some hints to help doctors to develop more effective treatments to prevent one of the most common childhood illnesses, which is ear infection.
Researchers have discovered a gene region that raises the risk a child will have a middle ear infection, known to doctors as acute otitis media (AOM) and known to parents as one reason for a screaming, unhappy preschooler.
“Parents and pediatricians are all too familiar with this painful childhood ear infection, it’s the most frequent reason children receive antibiotics,” said study leader Hakon Hakonarson, adding, “Although microbes cause this condition, it’s been well known that genetics also plays a role. This is the first and largest genetic study focused on risk susceptibility for acute otitis media.”
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Hakonarson and colleagues from CHOP collaborated with Dutch researchers, led by Gijs van Ingen and colleagues from the University Medical Center, Rotterdam.
The researchers performed a genome wide association study (GWAS) on two discovery cohorts with DNA samples from 11,000 children. They found that an association between AOM and a site on chromosome 6 containing the gene FNDC1, and then replicated the finding in an independent pediatric cohort with data from 2000 children.
Co-first author Jin Li, PhD, of CHOP, was the lead analyst on the study.
In further studies, the scientists showed that the mouse gene corresponding to FNDC1 was expressed in the animal’s middle ear.
“Although the gene’s function in humans has not been well studied, we do know that FNDC1 codes for a protein with a role in inflammation,” said Hakonarson.
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Hakonarson added that learning more about the biological interactions between genes and pathogens involved in AOM, researchers hope to develop more specific therapies for the childhood infection, while learning which children are most susceptible to the disease.
“As with many other diseases, early medical intervention may offer the greatest benefits,” he said.
The study has been published online in Nature Communications.