[PI3K and mTOR pathway and molecular targeted agents].

Molecular alteration of PI3K and mTOR pathways is frequently detected in various types of cancers. PIK3CA mutations are the predictive markers for anti-EGFR antibodies, trastuzumab, and lapatinib. The p110 isoform selective PI3K inhibitors has been developed in the clinical settings to reduced off-target induced adverse events. Feedback loop for PI3K signal leads the resistance to PI3K inhibitors. Dual PI3K/mTOR inhibitors and mutation selective PI3K inhibitors are under evaluation to circumvent the resistance.