PMID- 15241486 OWN - NLM STAT- MEDLINE DCOM- 20050511 LR - 20061115 IS - 1018-4813 (Print) IS - 1018-4813 (Linking) VI - 12 IP - 11 DP - 2004 Nov TI - Familial correlations and inter-relationships of four asthma-associated quantitative phenotypes in 320 French EGEA families ascertained through asthmatic probands. PG - 955-63 AB - Asthma is a complex disease, associated with biological and physiological phenotypes including immunoglobulin E (IgE) levels, sum of positive skin prick tests to allergens (SPTQ), eosinophil counts (EOS) and percent predicted forced expiratory volume in 1 s (%FEV1). We investigated the patterns of familial correlations and the inter-relationships of these four quantitative phenotypes, using the general class D regressive model, in 320 French EGEA nuclear families ascertained through 204 offspring (set A) and 116 parents (set B). Familial correlations of IgE and SPTQ were consistent with a model including no spouse correlation and equal parent-offspring and sib-sib correlations (rhoPO = rhoSS = 0.25 for IgE and 0.15 for SPTQ), this model being compatible with an additive polygenic model in the whole sample and the two family subsets A and B. Different patterns of familial correlations of EOS and %FEV1 were observed in these two sets. In set A, the best fitting model included no spouse correlation and equality of parent-offspring and sib-sib correlations (rhoPO = rhoSS = 0.14 for EOS and 0.23 for %FEV1). In set B, EOS had only a significant rhoSS of 0.28, while %FEV1 had significant rhoMO of 0.28 and rhoSS of 0.16. Analysis of shared familial determinants between these phenotypes indicated an overlap of at most 30% in rhoFO for IgE and SPTQ and in both rhoFO and rhoMO for IgE and EOS, while determinants of %FEV1 and atopy-related phenotypes appear distinct. These results may have implications for further linkage and association studies with genetic markers. FAU - Bouzigon, Emmanuelle AU - Bouzigon E AD - INSERM-Universite d'Evry EMI0006, Evry, France. bouzigon@evry.inserm.fr FAU - Chaudru, Valerie AU - Chaudru V FAU - Carpentier, Anne-Sophie AU - Carpentier AS FAU - Dizier, Marie-Helene AU - Dizier MH FAU - Oryszczyn, Marie-Pierre AU - Oryszczyn MP FAU - Maccario, Jean AU - Maccario J FAU - Kauffmann, Francine AU - Kauffmann F FAU - Demenais, Florence AU - Demenais F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Eur J Hum Genet JT - European journal of human genetics : EJHG JID - 9302235 RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Adolescent MH - Adult MH - Age Factors MH - Aged MH - Asthma/*genetics MH - Birth Order MH - Child MH - Female MH - France/epidemiology MH - Humans MH - Immunoglobulin E/metabolism MH - Likelihood Functions MH - Male MH - Middle Aged MH - Nuclear Family MH - Phenotype MH - Regression Analysis MH - Sex Factors MH - Smoking EDAT- 2004/07/09 05:00 MHDA- 2005/05/12 09:00 CRDT- 2004/07/09 05:00 PHST- 2004/07/09 05:00 [pubmed] PHST- 2005/05/12 09:00 [medline] PHST- 2004/07/09 05:00 [entrez] AID - 5201241 [pii] AID - 10.1038/sj.ejhg.5201241 [doi] PST - ppublish SO - Eur J Hum Genet. 2004 Nov;12(11):955-63. doi: 10.1038/sj.ejhg.5201241.