Abstract:
:Eighteen children with perennial asthma and allergy to house-dust mite (HDM) underwent a bronchial challenge with HDM. Before and 24 h after the test, a venous blood sample was taken to determine levels of eosinophils, eosinophil cationic protein (ECP), soluble interleukin-2 receptor (IL-2R), and interleukin-6 (IL-6). A histamine challenge was performed before and 24 h after the HDM challenge. All subjects showed an immediate asthmatic reaction (IAR). A definite late asthmatic reaction (LAR) was observed in 15 children, a probable LAR in two, and no LAR in one. Because of persistent bronchial obstruction (FEV1 < 70%), eight children were unable to perform a histamine challenge 24 h after the allergen challenge. These were the children with the lowest prechallenge provocation dose (PD20) of histamine. In the other 10 children, the mean PD20 histamine decreased after the HDM challenge (mean PD20 before was 0.56 mg/ml; after challenge it was 0.14 mg/ml; P = 0.007). After the HDM challenge, an increase was detected in the mean values of blood eosinophils (mean before was 446/mm3; mean after was 733/mm3; P = 0.002), ECP (mean before was 26.3 micrograms/l; mean after was 34.3 micrograms/l; P < 0.040), and IL-2R (mean before was 116.35 U/ml; mean after was 128.52 U/ml; P < 0.040). On the other hand, IL-6 remained unchanged after the HDM challenge (mean before was 9.47 pg/l; mean after was 9.70 pg/l; P = 0.360).(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Allergyjournal_title
Allergyauthors
Van Bever HP,Moens MM,Bridts CH,De Clerck LS,Mertens AV,Bosmans E,Stevens WJdoi
10.1111/j.1398-9995.1993.tb00742.xsubject
Has Abstractpub_date
1993-08-01 00:00:00pages
443-9issue
6eissn
0105-4538issn
1398-9995journal_volume
48pub_type
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