Inherited GATA3 variants are associated with Ph-like childhood acute lymphoblastic leukemia and risk of relapse
Menée sur 511 patients pédiatriques et 6 661 témoins, cette étude d'association sur le génome entier identifie des variants du gène GATA3 associés à la leucémie lymphoblastique aiguë "Ph-like", à la réponse thérapeutique et au risque de récidive
Recent genomic profiling of childhood acute lymphoblastic leukemia (ALL) identified a high-risk subtype with an expression signature resembling that of Philadelphia chromosome–positive ALL and poor prognosis (Ph-like ALL). However, the role of inherited genetic variation in Ph-like ALL pathogenesis remains unknown. In a genome-wide association study (GWAS) of 511 ALL cases and 6,661 non-ALL controls, we identified a susceptibility locus for Ph-like ALL (GATA3, rs3824662; P = 2.17 × 10−14, odds ratio (OR) = 3.85 for Ph-like ALL versus non-ALL; P = 1.05 × 10−8, OR = 3.25 for Ph-like ALL versus non-Ph-like ALL), with independent validation. The rs3824662 risk allele was associated with somatic lesions underlying Ph-like ALL (CRLF2 rearrangement, JAK gene mutation and IKZF1 deletion) and with variation in GATA3 expression. Finally, genotype at the GATA3 SNP was also associated with early treatment response and risk of ALL relapse. Our results provide insights into interactions between inherited and somatic variants and their role in ALL pathogenesis and prognosis.