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Eosinophils and eosinophil cationic protein in children with and without sensitization to inhalant allergens

  • Immunology/Allergologie
  • Original Paper
  • Published:
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Abstract

Eosinophil inflammation is a common feature of allergic disorders and particularly in allergic asthma interest has been paid to related markers. In a communitybased survey of 10-year-old children, the association of eosinophil count (EC) and serum eosinophil cationic protein (ECP) with allergic sensitization, clinical history and exposure to mite allergen was studied. Relying on the results of skin prick tests, the children were divided to three groups: (1) children showing no sensitization to one of the seven inhalant allergens (n=16); (2) children with sensitization to at least one of five non-mite allergens (n=16); and (3) children with sensitization to mite allergens (n-75). Clinical history of asthma and hay fever was ascertained using standardized questionnaires. EC in peripheral blood and serum ECP were measured on one single occasion. Prior to blood sampling, mite allergen exposure at home had been assessed by taking dust samples and measuring the mite antigen concentration by means of an enzyme immunoassay. Compared to group 1, higher ECs were obvious in group 2 (P=0.037) and in group 3 (P=0.0013). Regarding serum ECP, higher levels occurred in group 2 (P=0.0033) as well as in group 3 (P=0.0001) when comparing them to the reference group. Sensitized children with neither asthma, nor asthma-like symptoms, nor hay fever (n=28) did not have significantly lower ECs and serum ECP levels than those with hay fever (n=15;P=0.09,P=0.17) and those with asthma (n=22;P=0.69,P=0.64). Since mild asthmatics were in general included, our findings were limited with regard to clinical severity. Using multiple linear regression, EC occurs in positive association with mite allergen exposure at home (P=0.033) and with a history of asthma-like symptoms (P=0.02).

Conclusion

Our findings indicate that EC and serum ECP are confounded by the status of allergic sensitization. Therefore, value and limits of both parameters need further investigation before use in the management of allergic children can be recommended.

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Abbreviations

Der f I :

major antigen I ofDermatophagoides farinae

Der p I :

major antigen I ofDermatophagoides pteronyssinus EC eosinophil count

ECP :

eosinophil cationic protein

ICECP :

intra-cellular eosinophil cationic protein

SPT :

skin prick test

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Kuehr, J., Frischer, T., Barth, R. et al. Eosinophils and eosinophil cationic protein in children with and without sensitization to inhalant allergens. Eur J Pediatr 153, 739–744 (1994). https://doi.org/10.1007/BF01954491

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  • DOI: https://doi.org/10.1007/BF01954491

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