Cross validating these genes with previously published gene expression datasets obtained from FRDA patients (Coppola et al., 2011) and mouse models associated with FRDA (Miranda et al., 2002; Puccio et al., 2001), identified several genes involved in the chemokine signaling pathway (E.g.: Ccl2, 3, 4, 7, Cxcl1, 16, Prkcd, Stat3) consistently differentially expressed in these six independent FRDA associated datasets (Figure 7—figure supplement 2). Here, CCL2 is linked to Friedreich ataxia.