Are polymorphisms of the immunoregulatory factor CD40LG implicated in acute transfusion reactions?

作者：Aloui Chaker; Sut Caroline; Prigent Antoine; Fagan Jocelyne; Cognasse Fabrice; Granados Herbepin Viviana; Touraine Renaud; Pozzetto Bruno; Aouni Mahjoub; Fendri Chedlia; Hassine Mohsen; Chakroun Tahar; Jemni Yacoub Saloua; Garraud Olivier^*; Laradi Sandrine

来源：Scientific Reports, 2014, 4(1): 7239.

DOI：10.1038/srep07239

The CD40 ligand (CD40L/CD154), a member of TNF superfamily, is notably expressed on activated CD4+T-cells and stimulated platelets. CD40L is linked to a variety of pathologies and to acute transfusion reactions (ATR). Mutations in this gene (CD40LG) lead to X-linked hyper-IgM syndrome. Some CD40LG polymorphisms are associated with variable protein expression. The rationale behind this study is that CD40L protein has been observed to be involved in ATR. We wondered whether genetic polymorphisms are implicated. We investigated genetic diversity in the CD40LG using DHPLC and capillary electrophoresis for screening and genotyping (n=485 French and Tunisian blood donors). We identified significant difference in the CD40LG linkage pattern between the two populations. Variant minor alleles were significantly over-represented in Tunisian donors (P<0.0001 to 0.0270). We found higher heterogeneity in the Tunisian, including three novel low frequency variants. As there was not a particular pattern of CD40LG in single apheresis donors whose platelet components induced an ATR, we discuss how this information may be useful for future disease association studies on CD40LG.

• 出版日期2014-11-28