The present invention relates to use of pyrimido-diazepinone compounds that are able to modulate protein kinases such as PI3K-γ and PI3K-δ, which are members of the Class I Type IA and Class I Type IB family of phosphatidylinositol-4,5-bisphosphate 3-kinases, and the use of such compounds in the treatment of various diseases, disorders or conditions.