highly significantp = 10 −37
Genes overexpressed in old but not young Nrg1 tg-type I mice (Supplementary Table 3 ) included many with immune and inflammatory functions, and IPA generated two highly significant networks ( p = 10 −37 and p = 10 −34 ; one is shown in Fig. 1e , the other in Supplementary Fig. 4 ).