Reference Detail

Ref Type Journal Article
PMID (26351323)
Authors Davies BR, Guan N, Logie A, Crafter C, Hanson L, Jacobs V, James N, Dudley P, Jacques K, Ladd B, D'Cruz CM, Zinda M, Lindemann J, Kodaira M, Tamura K, Jenkins EL
Title Tumors with AKT1E17K Mutations Are Rational Targets for Single Agent or Combination Therapy with AKT Inhibitors.
Journal Molecular cancer therapeutics
Vol 14
Issue 11
Date 2015 Nov
URL
Abstract Text AKT1(E17K) mutations occur at low frequency in a variety of solid tumors, including those of the breast and urinary bladder. Although this mutation has been shown to transform rodent cells in culture, it was found to be less oncogenic than PIK3CA mutations in breast epithelial cells. Moreover, the therapeutic potential of AKT inhibitors in human tumors with an endogenous AKT1(E17K) mutation is not known. Expression of exogenous copies of AKT1(E17K) in MCF10A breast epithelial cells increased phosphorylation of AKT and its substrates, induced colony formation in soft agar, and formation of lesions in the mammary fat pad of immunodeficient mice. These effects were inhibited by the allosteric and catalytic AKT inhibitors MK-2206 and AZD5363, respectively. Both AKT inhibitors caused highly significant growth inhibition of breast cancer explant models with AKT1(E17K) mutation. Furthermore, in a phase I clinical study, the catalytic Akt inhibitor AZD5363 induced partial responses in patients with breast and ovarian cancer with tumors containing AKT1(E17K) mutations. In MGH-U3 bladder cancer xenografts, which contain both AKT1(E17K) and FGFR3(Y373C) mutations, AZD5363 monotherapy did not significantly reduce tumor growth, but tumor regression was observed in combination with the FGFR inhibitor AZD4547. The data show that tumors with AKT1(E17K) mutations are rational therapeutic targets for AKT inhibitors, although combinations with other targeted agents may be required where activating oncogenic mutations of other proteins are present in the same tumor.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Therapy Description
Drug Name Trade Name Synonyms Drug Classes Drug Description
Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
AKT1 E17K breast cancer sensitive Capivasertib Preclinical Actionable In a preclinical study, Capivasertib (AZD5363) inhibited growth and colony formation of breast cancer cells expressing AKT E17K in cell culture and in xenografts as well as breast cancer explant models harboring AKT E17K (PMID: 26351323). 26351323
AKT1 E17K FGFR3 Y373C urinary bladder cancer sensitive AZD4547 + Capivasertib Preclinical Actionable In a preclinical study, the combined therapy of AZD5363 and AZD4547 resulted in tumor regression in urinary bladder cancer xenograft models simultaneously harboring the mutations, AKT1 E17K and FGFR3 Y373C (PMID: 26351323). 26351323
AKT1 E17K ovarian endometrial cancer sensitive Capivasertib Phase I Actionable In a Phase I clinical study, a patient with endometrioid ovarian carcinoma harboring AKT1 E17K had a sustained partial response to AZD5363 for more than two years (PMID: 26351323). 26351323
AKT1 E17K breast papillary carcinoma sensitive Capivasertib Phase I Actionable In a Phase I clinical trial, a patient with ER-positive, ERBB2 (HER2)-negative papillary breast carcinoma harboring AKT1 E17K had a sustained partial response to AZD5363 (PMID: 26351323). 26351323