Characterization of VHepsilon gene expressed in PBL from children with atopic diseases: detection of homologous VH1-69 derived transcripts from three unrelated patients

Immunology Letters
Yuki BandoChisei Ra

Abstract

To elucidate the molecular background of IgE production in early infancy, we analyzed the nucleotide sequences of 36 VH-Cepsilon transcripts expressed in PBL from three infants with allergic diseases. We detected transcripts derived from VH1, VH3, VH4 gene family members, and no bias was observed in the usage of particular VH gene family. However, some VH members, VH1; 1-46, 1-69, VH3; 3-11, 3-21, VH4; 4-39, 4-59 were frequently seen and thus notable. VH4 gene was dominant in one patient with severe atopic dermatitis and food allergy, suggesting the involvement of this gene in pathogenesis of the disease. Even a limited number of clones were analyzed, we also found highly homologous VH1-69 derived sequences from all the three patients, which share the same somatic mutations or polymorphic variations in complementarity-determining region (CDR) 1, and 2 with the same CDR3 (D-JH) sequences including the junctions. These findings might suggest that a rather limited VH gene might be rearranged for specific IgE in early life.

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Citations

Feb 12, 2008·Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology·J M Davies, R E O'Hehir
Jul 28, 2010·The Journal of Immunology : Official Journal of the American Association of Immunologists·Sebastian KerzelMichael Zemlin
Jul 28, 2018·International Immunology·Hannah J Gould, Yu-Chang Bryan Wu

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