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Ref Type Journal Article
PMID (23270925)
Authors Hart S, Novotny-Diermayr V, Goh KC, Williams M, Tan YC, Ong LC, Cheong A, Ng BK, Amalini C, Madan B, Nagaraj H, Jayaraman R, Pasha KM, Ethirajulu K, Chng WJ, Mustafa N, Goh BC, Benes C, McDermott U, Garnett M, Dymock B, Wood JM
Title VS-5584, a novel and highly selective PI3K/mTOR kinase inhibitor for the treatment of cancer.
Journal Molecular cancer therapeutics
Vol 12
Issue 2
Date 2013 Feb
URL
Abstract Text Dysregulation of the PI3K/mTOR pathway, either through amplifications, deletions, or as a direct result of mutations, has been closely linked to the development and progression of a wide range of cancers. Moreover, this pathway activation is a poor prognostic marker for many tumor types and confers resistance to various cancer therapies. Here, we describe VS-5584, a novel, low-molecular weight compound with equivalent potent activity against mTOR (IC(50) = 37 nmol/L) and all class I phosphoinositide 3-kinase (PI3K) isoforms IC(50): PI3Kα = 16 nmol/L; PI3Kβ = 68 nmol/L; PI3Kγ = 25 nmol/L; PI3Kδ = 42 nmol/L, without relevant activity on 400 lipid and protein kinases. VS-5584 shows robust modulation of cellular PI3K/mTOR pathways, inhibiting phosphorylation of substrates downstream of PI3K and mTORC1/2. A large human cancer cell line panel screen (436 lines) revealed broad antiproliferative sensitivity and that cells harboring mutations in PI3KCA are generally more sensitive toward VS-5584 treatment. VS-5584 exhibits favorable pharmacokinetic properties after oral dosing in mice and is well tolerated. VS-5584 induces long-lasting and dose-dependent inhibition of PI3K/mTOR signaling in tumor tissue, leading to tumor growth inhibition in various rapalog-sensitive and -resistant human xenograft models. Furthermore, VS-5584 is synergistic with an EGF receptor inhibitor in a gastric tumor model. The unique selectivity profile and favorable pharmacologic and pharmaceutical properties of VS-5584 and its efficacy in a wide range of human tumor models supports further investigations of VS-5584 in clinical trials.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
VS-5584 VS-5584 9 1
Drug Name Trade Name Synonyms Drug Classes Drug Description
VS-5584 SB-2343|SB2343|VS5584 mTOR Inhibitor 51 PI3K Inhibitor (Pan) 37 VS-5584 (SB-2343) inhibits mTOR kinase and all class I PI3K isoforms, disrupting phosphorylation of substrates downstream of PI3K and mTOR, thereby preventing cell proliferation and inhibiting tumor growth (PMID: 23270925, PMID: 32286946).
Gene 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
Unknown unknown Advanced Solid Tumor not applicable VS-5584 Preclinical - Cell line xenograft Actionable In a preclinical study, VS-5584 inhibited growth of a variety of human tumor cell lines in culture and inhibited tumor growth in cell line xenograft models (PMID: 23270925). 23270925
ERBB2 over exp gastric adenocarcinoma sensitive VS-5584 Preclinical - Cell line xenograft Actionable In a preclinical study, VS-5584 inhibited tumor growth in human gastric cancer cell line xenograft models overexpressing ERBB2 (HER2) (PMID: 23270925). 23270925
PIK3CA mutant breast cancer sensitive VS-5584 Preclinical Actionable In a preclinical study, PIK3CA mutant breast cancer cells showed increased sensitivity to VS-5584 compared to PIK3CA wild-type cells in culture (PMID: 23270925). 23270925
PIK3CA mutant Advanced Solid Tumor sensitive VS-5584 Preclinical Actionable In preclinical studies, VS-5584 demonstrated efficacy in a variety of cancer cell lines, particularly those harboring PIK3CA mutations (PMID: 23270925). 23270925
FLT3 act mut acute myeloid leukemia sensitive VS-5584 Preclinical - Cell line xenograft Actionable In a preclinical study, VS-5584 inhibited PI3K/mTOR signaling and cell proliferation in a FLT3-ITD positive human acute myeloid leukemia cell line in culture, and inhibited tumor growth in xenograft models (PMID: 23270925). 23270925
PIK3CA E542K colon adenocarcinoma sensitive VS-5584 Preclinical Actionable In preclinical studies, VS-5584 demonstrated efficacy in a variety of cancer cell lines, particularly those harboring PIK3CA mutations (PMID: 23270925). 23270925
ERBB2 act mut PIK3CA act mut breast cancer sensitive VS-5584 Preclinical Actionable In a preclinical study, breast cancer cells with mutations in both ERBB2 (HER2) and PIK3CA were more sensitive to VS-5584 (PMID: 23270925). 23270925