Activity of serum sPLA2 IIa was determined in children who underwent tonsillectomy, including OSA in 126 cases and RT in 60. Serum enzyme activities were measured using the standard assay with Diheptanoyl Thio-Phosphatidylcholin as substrate.
The sPLA2 IIa activity of serum was significantly higher in RT than in OSA (P < 0.01). Serum sPLA2 IIa activity in the RT patients was positively correlated with BMI (r = 0.26; P = 0.02), which was not apparent in OSA (r = 0.14; P = 0.09).
This study suggests that serum sPLA2 IIa activity may be considered as a supportive diagnostic marker in suspected or clinically unclear cases of RT children.