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Ref Type Journal Article
PMID (28750271)
Authors Angevin E, Cassier PA, Italiano A, Gonçalves A, Gazzah A, Terret C, Toulmonde M, Gravis G, Varga A, Parlavecchio C, Paci A, Poinsignon V, Soria JC, Drubay D, Hollebecque A
Title Safety, tolerability and antitumour activity of LY2780301 (p70S6K/AKT inhibitor) in combination with gemcitabine in molecularly selected patients with advanced or metastatic cancer: a phase IB dose escalation study.
Abstract Text LY2780301, a dual inhibitor of protein kinase B (AKT) and the downstream effector p70 ribosomal protein S6 kinase (p70S6K), may inhibit progression in tumours relying on phosphatidylinositol 3-kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) signalling pathway activation. This phase IB trial investigated the maximum tolerated dose (MTD), dose-limiting toxicities (DLTs), safety, pharmacokinetics (PK) and antitumour activity of LY2780301 plus gemcitabine in patients with advanced/metastatic solid tumours.This was a non-randomised, open-label, dose escalation and dose expansion trial. Patients harbouring molecular alterations of the PI3K/AKT/mTOR pathway received once daily (QD) oral LY2780301 (400 or 500 mg) in combination with intravenous gemcitabine (750 or 1000 mg/m2) on days 1, 8 and 15 of a 28-d cycle. Dose escalation followed a 3 + 3 design. Assessments included adverse events (AEs), PK and preliminary antitumour activity.Fifty patients (median age, 53 years; 74% female) predominantly with mutations/amplifications of PI3K (60%) and phosphatase and tensin homologue (PTEN) gene/protein inactivation (42%) were treated for up to 14 cycles. The MTD was LY2780301 500 mg QD with gemcitabine 750 mg/m2. DLTs during cycle 1 were grade IV thrombocytopenia, grade III skin rash and grade III increase in alkaline phosphatase, gamma glutamyltransferase and alanine aminotransferase, occurring in one patient each. Most common AEs were anaemia (84%), fatigue (84%), transaminase increase (74%), thrombocytopenia (74%), nausea/vomiting (70%), neutropenia (68%) and lymphopenia (56%). Among the efficacy-evaluable population, two patients (5%) had a partial response; the disease control rate was 74% at cycle 2.Addition of LY2780301 to gemcitabine showed manageable toxicity and encouraging antitumour activity in patients with molecular alterations of the PI3K/AKT/mTOR pathway.NCT02018874.


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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
Drug Name Trade Name Synonyms Drug Classes Drug Description
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
PTEN loss breast adenocarcinoma sensitive Gemcitabine + LY2780301 Phase Ib/II Actionable In a Phase Ib trial, a breast adenocarcinoma patient harboring PTEN loss demonstrated a partial response when treated with a combination of LY2780301 and Gemzar (gemcitabine) (PMID: 28750271). 28750271
PIK3CA E542K cervical squamous cell carcinoma sensitive Gemcitabine + LY2780301 Phase Ib/II Actionable In a Phase Ib trial, a patient with cervical squamous cell carcinoma harboring PIK3CA E542K demonstrated a partial response when treated with a combination of LY2780301 and Gemzar (gemcitabine) (PMID: 28750271). 28750271