
The study analyzed transcript levels for a panel of DNA-repair genes in E17.5 vs adult mouse kidneys and noted seven that were increased >20-fold. To determine whether Neil3-expression is WT1-dependent, the study knocked down Wt1 in Cited1(+) NPCs (60% knockdown efficiency) and noted a 58% reduction in Neil3 transcript levels. We showed that WT1 directly binds to the Neil3 promoter and that activity of a Neil3 promoter-reporter vector was increased two-fold in WT1(+) vs WT1(-) cells. This study proposes that Neil3 is a WT1-dependent DNA-repair gene, expressed at high levels in Cited1(+) NPCs where it repairs mutational injury to the genome during nephrogenesis.
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