IL6 and cerebellar ataxia: However, ataxia worsened in older GFAP-IL6 mice, as the 6- (p = 0.007), 14- (p = 0.01), and 24- (p < 0.0001) -month-old GFAP-IL6 mice displayed significantly worse ataxia scores than the 3-month-old mice (Figure 5B).