Akt and some types of cancer

Cancer has the highest incidence and causes the most mortality worldwide. The phosphatidylinositol 3-kinase (PI3K)/Protein Kinase B (PKB Akt) pathway is considered to be one of the most frequently altered pathways in human cancer with documented high relevance to tumour growth metastatic spread and resistance to anticancer treatment. Many human solid tumours harbour genetic alterations driving aberrant activation of the survival kinase Akt such as oncogenic activation of receptor tyrosine kinases RAS or phosphatidylinositol-3-kinase (PI3K) loss of the tumour suppressor PTEN or genomic amplification or gain-of-function mutations in one of the three known human Akt isoforms Akt1 (PKB?) Akt2 (PKB?) and Akt3 (PKB?).