NT5C3A and neoplasm: Additionally, we verified that increased p21 expression in MK-2206 treated PSN1 xenografts was linked to inhibition of AKT, decreased phospho-S48-NPM, ARF nucleolar re-localization and decreased p53mut expression by ex-vivo staining of tumor sections by immunofluorescence and immunohistochemical staining (IHC) (Fig. 7B, 7C and 7D).