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Increased TLR7 expression in the adenoids among children with otitis media with effusion
Anna Granath1, Rolf Uddman, Lars-Olaf Cardell
1Division of ENT Diseases, Department of Clinical Sciences, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden. anna.granath@karolinska.se
Conclusion:
Toll-like receptor 7 (TLR7) is present in the adenoids in young children and might play a role in the immunological response behind the development of otitis media with effusion (OME).
Objectives:
To investigate the expression of the TLRs TLR4 and TLR7 in adenoids from children with OME and to compare the results with data obtained from healthy controls.
Subjects And Methods:
This was a controlled, prospective study. Eleven young children with long-standing OME and 10 controls with healthy middle ears were recruited consecutively when scheduled for adenoidectomy. mRNA was quantified using real-time polymerase chain reaction (PCR) and the localization of the corresponding proteins was assessed by immunohistochemistry.
Results:
mRNA for TLR4 and TLR7 could be obtained from all samples tested along with their corresponding proteins. The mRNA levels for TLR7 were increased among the children with a history of OME. No such increase was found for TLR4.
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