PIK3CG and chronic myelogenous leukemia, BCR-ABL1 positive: It has been reported that p110γ was upregulated and activated by the chimeric oncogene Bcr-Abl expression to contribute to cell proliferation and drug resistance in chronic myelogenous leukemia [23], and was found to be highly and specifically expressed among the PI3K family in human pancreatic cancer [24], suggesting that class IB PI3K might relate to cell survival and drug resistance.