Other candidate genes which might mediate pathology in KD/SBMA have been identified, including vascular endothelial growth factor (Vegfa) [7], [9], P300/CREB binding protein (P300/CBP) [9], [16], heat shock proteins [17], [18], [19], [20], [21], [22], [23], [24], and genes related to mitochondrial function [25]. This evidence concerns the gene CREBBP and Kennedy disease.