Cited by 7Lung Cancer Treatments and MutationsPI3K/AKT/mTOR signaling in cancerChromatin Remodeling and Cancer

A phase II trial of mTORC1/2 inhibition in STK11 deficient non small cell lung cancer

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Middleton, Gary, Robbins, Helen L., Fletcher, Peter, Savage, Joshua, Mehmi, Manita, Summers, Yvonne, Greystoke, Alastair, Steele, Nicola +15 more·2025·npj Precision Oncology

Abstract

There are no current stratified medicine options for STK11-deficient NSCLC. STK11 loss mediates mTORC activation, GLUT1 up-regulation and increased glycolysis. This metabolic reprogramming might represent a therapeutic vulnerability targetable with mTORC1/2 inhibition. In arm B2 of the National Lung Matrix Trial 54 patients with NSCLC received vistusertib, of which 49 were STK11-deficient (30 with KRAS mutation (B2D), 19 without (B2S)). Objective response (OR) and durable clinical benefit (DCB) rates with 95% credible intervals (CrI) were estimated from posterior probability distributions generated using Bayesian beta-binomial conjugate analysis. In B2D, 2 per-protocol patients obtained OR (estimated true OR rate (95%CrI) 9.8% (2.4–24.3). Estimates of true DCB rate (95%CrI): B2D 24.4% (11.1–42.3), B2S 14.6% (3.6–34.7). Overall, vistusertib cannot be recommended in this context. Longitudinal ctDNA analysis demonstrates enrichment of SMARCA4 mutations post-treatment. In vitro studies show adaptive resistance to mTORC1/2 inhibition via AKT reactivation. (NCT02664935, ISRCTN38344105, EudraCT 2014-000814-73, 10 June 2015)

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Authors
Middleton, G., Robbins, H. L., Fletcher, P., Savage, J., Mehmi, M., Summers, Y., Greystoke, A., Steele, N., Popat, S., Jain, P., Spicer, J., Cave, J., Shaw, P., Gilligan, D., Power, D., Fennell, D., Bajracharya, M., McBride, D. J., Maheswari, U., Frankell, A. M., Swanton, C., Beggs, A. D., & Billingham, L.
Affiliations
  • University Hospitals Birmingham NHS Foundation Trust (GB)
  • Cancer Research UK Clinical Trials Unit (GB)
  • The Christie Hospital (GB)
  • Newcastle University (GB)
  • Beatson West of Scotland Cancer Centre (GB)
  • Royal Marsden Hospital (GB)
  • St James's University Hospital (GB)
  • Guy's Hospital (GB)
  • University Hospital Southampton NHS Foundation Trust (GB)
  • Velindre Cancer Centre (GB)
  • Addenbrooke's Hospital (GB)
  • Imperial College Healthcare NHS Trust (GB)
  • Leicester Royal Infirmary (GB)
  • Illumina (United Kingdom) (GB)
  • The Francis Crick Institute (GB)
Corresponding author
Middleton, Gary
Venue
npj Precision Oncology
Published
2025-03-11
Volume
9
Issue
1
Pages
67-67
ISSN
2397-768X (ISSN-L)
OpenAlex
W4408337283
Cited by
7
References
63
Citations by year
2026: 4 · 2025: 3
FWCI
4.60
Type
journal article
Language
en
Open access
Locations
  • npj Precision Oncology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Portal (King's College London) (publishedVersion, cc-by)
  • University of Birmingham Research Portal (University of Birmingham) (publishedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
  • The Francis Crick Institute (cc-by)
Funders
  • AstraZeneca
  • Cancer Research UK (A22209, C22436/A25354, C11497/A19363, A19363)
  • National Institute for Health and Care Research
  • Imperial Experimental Cancer Medicine Centre
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
non-small cell lung cancer, mTORC1/2 inhibition, vistusertib, KRAS mutation, metabolic reprogramming, glycolysis, SMARCA4 mutation, adaptive resistance, ctDNA, objective response rate

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