RARRES2 and ataxia telangiectasia: In AT abd, the expression of NAMPT was significantly correlated with the expression of all metabolic factors tested and the expression of RARRES2 was correlated with those of FASN (r = 0.78, P < 0.0001), PPARG (r = 0.73, P < 0.0001) and GLUT8 (r = 0.76, P < 0.0001) (Table 13).