Akutte luftvejsinfektioner og mangel på mannosebindende lektin hos små børn

Anders Koch*, Mads Melbye, Per Sørensen, Preben Homøe, Hans O. Madsen, Kåre Mølbak, Christoffer Holst Hansen, Lasse Høgh Andersen, Gitte Weinkauff Hahn, Peter Garred

*Corresponding author af dette arbejde

    Publikation: Bidrag til tidsskriftArtikelForskningpeer review


    Introduction: According to hospital-based studies, increased susceptibility to certain infections is associated with genotypes that cause low serum levels of the protein mannose-binding lectin (MBL). However, the contribution of MBL insufficiency to the incidence of common childhood infections on a population basis is unknown. To investigate the effect of MBL insufficiency on the risk of acute respiratory infections (ARI) in unselected children, we performed a prospective population-based study of ARI in young children in Sisimiut, Greenland. Material and methods: An open cohort of children aged 0-2 years was formed in 1996, and followed up with weekly morbidity surveillance visits for a two-year period. Episodes of ARI were diagnosed on medical history and clinical examinations. MBL genotypes were determined from blood samples according to the presence of structural alleles and promoter alleles. Results: Altogether 294 children participated and 44 refused. Blood samples were taken from 252 participants. A 2.1-fold (95% confidence interval 1.4-3.1) increased risk of ARI was found in MBL-insufficient children compared with MBL-sufficient children (p<0.001). The risk association was largely restricted to the period 6 to 17 months of age, whereas less or no effect could be shown in younger and older children. Discussion: These population-based data suggest that genetic factors such as MBL insufficiency play an important role in host defence, particularly during the vulnerable period of infancy between 6 and 17 months of age, when the adaptive immune system is immature.

    Bidragets oversatte titelAcute respiratory tract infections and mannose-binding lectin insufficiency during early childhood
    Sider (fra-til)5635-5640
    Antal sider6
    TidsskriftUgeskrift for laeger
    Udgave nummer48
    StatusUdgivet - 25 nov. 2002


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