Allergy Asthma Respir Dis.  2017 Jan;5(1):47-51. 10.4168/aard.2017.5.1.47.

Assessment of leukotriene E4 in exhaled breath condensate as a marker of inflammation and therapeutic effect in allergic rhinitis children

• Kwak BO
• Park YM

• KMID: 2368576
• DOI: http://doi.org/10.4168/aard.2017.5.1.47

Abstract

PURPOSE
Recent studies have shown that the cysteinyl leukotriene (cysLT) of exhaled breath condensate (EBC) could be predictive of inflammatory status and effectiveness of treatment in allergic disease. The aim of this study was to evaluate the inflammation and therapeutic effectiveness of cysLT in EBC in pediatric patients with allergic rhinitis (AR).
METHODS
We enrolled 34 healthy children (median age, 4 years 10 months) and 67 AR children (median age, 5 years 1 month). All of the AR patients received intranasal steroid (fluticasone furoate) once daily for 2 weeks. After 2 week of fluticasone furoate treatment, they were classified into 2 groups: the fluticasone furoate (F) and montelukast (M) groups. We treated each group for another 8 weeks. To evaluate the therapeutic effectiveness, we used symptom score (SS) and EBC leukotriene E4 (LTE4). EBC samples were collected with RTube. Each parameter was checked at 0, 2, and 10 weeks of therapy.
RESULTS
Most of the AR patients showed clinical improvement with 2- and 10-week fluticasone therapy (F group: 0-week SS, 5.6; 2-week SS, 3.6; 10-week SS, 2.1; P<0.01; M group: 0-week SS, 4.8; 2-week SS, 3.2; 10-week SS, 1.9: P<0.01). LTE4 levels were higher in AR patients than in control subjects (0 week: 87 pg/mL vs. 18 pg/mL) and were reduced after 2 weeks of fluticasone treatment (F group: 90→51.6 pg/mL, P<0.01; M group: 84→46.1 pg/mL, P<0.01). After 10 weeks of treatment, there was no significant difference in the LTE4 level between the F and M groups.
CONCLUSION
LTE4 in EBC may be useful for evaluating inflammation and therapeutic effectiveness in patients with allergic rhinitis.

Keyword

Allergic rhinitis; Exhaled breath condensate; Leukotriene; Child

MeSH Terms

Child*
Fluticasone
Humans
Inflammation*
Leukotriene E4*
Rhinitis, Allergic*
Fluticasone
Leukotriene E4

Figure

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  Fig. 1 Changes of symptom score after treatment. **P<0.01.

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  Fig. 2 Changes of leukotriene E4 level in exhaled breath condensate after treatment. **P<0.01.

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