Eicosanoids seasonally impact pulmonary function in asthmatic patients with Japanese cedar pollinosis |
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| Affiliation: | 1. Department of Respiratory Medicine, Saitama Medical University, Saitama, Japan;2. Allergy Center, Saitama Medical University, Saitama, Japan;3. Hoshi Clinic, Saitama, Japan |
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| Abstract: | BackgroundCondition of asthma in patients with asthma and concomitant seasonal allergic rhinitis (SAR) deteriorates during the Japanese cedar pollen (JCP) season. However, the underlying mechanisms remain unclear.MethodsWe analyzed seasonal variations in eicosanoid levels in the airways of patients with asthma and concomitant SAR sensitized to JCP (N = 29, BA-SAR-JCP group) and those not sensitized (N = 13, BA-AR-non-JCP group) during the JCP season. The association between changes in eicosanoid concentrations and pulmonary function was assessed. Exhaled breath condensate (EBC) was collected, and pulmonary function tests were performed during the JCP and non-JCP seasons. The cysteinyl leukotriene (CysLT), thromboxane B2 (TXB2), prostaglandin D2-methoxime (PGD2-MOX), and leukotriene B4 (LTB4) levels in the collected EBC were measured via enzyme-linked immunosorbent immunoassays.ResultsThe log CysLT levels significantly increased in the BA-SAR-JCP group during the JCP season compared with the non-JCP season (1.78 ± 0.55, 1.39 ± 0.63 pg/mL, mean ± standard deviation, respectively, p = 0.01) and those in the BA-AR-non-JCP group during the JCP season (1.39 ± 0.38 pg/mL, p = 0.04). Moreover, the log TXB2 levels seemed to increase. However, the log LTB4 and log PGD2-MOX levels did not increase. The changes in the log CysLT levels during the two seasons were negatively correlated to forced expiratory volume in one second (FEV1) in the BA-SAR-JCP group (r = −0.52, p < 0.01).ConclusionsIn the BA-SAR-JCP group, seasonal increases in eicosanoid levels in the airway likely promoted deterioration in pulmonary function despite optimal maintenance treatment. |
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| Keywords: | Allergic asthma Cysteinyl leukotrienes Exhaled breath condensate Japanese cedar pollen %FEV1 ACT" },{" #name" :" keyword" ," $" :{" id" :" kwrd0040" }," $$" :[{" #name" :" text" ," _" :" asthma control test AR" },{" #name" :" keyword" ," $" :{" id" :" kwrd0050" }," $$" :[{" #name" :" text" ," _" :" allergic rhinitis ATS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0060" }," $$" :[{" #name" :" text" ," _" :" American Thoracic Society BA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0070" }," $$" :[{" #name" :" text" ," _" :" bronchial asthma BA-AR-non-JCP" },{" #name" :" keyword" ," $" :{" id" :" kwrd0080" }," $$" :[{" #name" :" text" ," _" :" asthmatics with concomitant AR non-sensitized to JCP BALF" },{" #name" :" keyword" ," $" :{" id" :" kwrd0090" }," $$" :[{" #name" :" text" ," _" :" bronchoalveolar lavage fluid BA-SAR-JCP" },{" #name" :" keyword" ," $" :{" id" :" kwrd0100" }," $$" :[{" #name" :" text" ," _" :" asthmatics with concomitant SAR sensitized to JCP CysLT" },{" #name" :" keyword" ," $" :{" id" :" kwrd0110" }," $$" :[{" #name" :" text" ," _" :" cysteinyl leukotriene CysLT receptor type 1 CysLT receptor type 2 CysLT receptor type 3 EBC" },{" #name" :" keyword" ," $" :{" id" :" kwrd0150" }," $$" :[{" #name" :" text" ," _" :" exhaled breath condensate FeNO" },{" #name" :" keyword" ," $" :{" id" :" kwrd0160" }," $$" :[{" #name" :" text" ," _" :" fraction of exhaled nitric oxide forced expiratory volume in one second GINA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0180" }," $$" :[{" #name" :" text" ," _" :" Global Initiative for Asthma ICS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0190" }," $$" :[{" #name" :" text" ," _" :" inhaled corticosteroid JCP" },{" #name" :" keyword" ," $" :{" id" :" kwrd0200" }," $$" :[{" #name" :" text" ," _" :" Japanese cedar pollen JCP season" },{" #name" :" keyword" ," $" :{" id" :" kwrd0210" }," $$" :[{" #name" :" text" ," _" :" JCP scattering season LTRA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0230" }," $$" :[{" #name" :" text" ," _" :" leukotriene receptor antagonist NCS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0240" }," $$" :[{" #name" :" text" ," _" :" nasal corticosteroid non-JCP season" },{" #name" :" keyword" ," $" :{" id" :" kwrd0250" }," $$" :[{" #name" :" text" ," _" :" non-JCP scattering season OCS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0260" }," $$" :[{" #name" :" text" ," _" :" oral corticosteroid SAR" },{" #name" :" keyword" ," $" :{" id" :" kwrd0290" }," $$" :[{" #name" :" text" ," _" :" seasonal allergic rhinitis |
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