PIK3R1 and breast carcinoma: The "Breast Cancer Regulation by Stathmin1" IPA-pathway (2.63E-3) which includes the V3-modulated genes ROCK1, PAK1, PPP1R10, CAMK1D, PIK3R1, PRKAR1B, PPP1CB, UHMK1, PPP2R1B and CDK1, plays a regulatory role in microtubule dynamics.