Cited by 115Lung Cancer Treatments and MutationsLung Cancer Research StudiesLung Cancer Diagnosis and Treatment

Immunohistochemical Loss of LKB1 Is a Biomarker for More Aggressive Biology in KRAS -Mutant Lung Adenocarcinoma

Calles, Antonio, Sholl, Lynette M., Rodig, Scott J., Pelton, Ashley K., Hornick, Jason L., Butaney, Mohit, Lydon, Christine, Dahlberg, Suzanne E. +3 more·2015·Clinical Cancer Research

Published version of a preprint

Abstract

Purpose: LKB1 loss is common in lung cancer, but no assay exists to efficiently evaluate the presence or absence of LKB1. We validated an IHC assay for LKB1 loss and determined the impact of LKB1 loss in KRAS-mutant non–small cell lung cancer (NSCLC). Experimental Design: We optimized and validated an IHC assay for LKB1 (clone Ley37D/G6) using a panel of lung cancer cell lines and tumors with known LKB1 mutations, including 2 patients with Peutz–Jeghers syndrome (PJS) who developed lung adenocarcinoma. We retrospectively analyzed tumors for LKB1 using IHC from 154 KRAS-mutant NSCLC patients, including 123 smokers and 31 never-smokers, and correlated the findings with patient and tumor characteristics and clinical outcome. Results: LKB1 expression was lost by IHC in 30% of KRAS-mutant NSCLC (smokers 35% vs. never-smokers 13%, P = 0.017). LKB1 loss did not correlate with a specific KRAS mutation but was more frequent in tumors with KRAS transversion mutations (P = 0.029). KRAS-mutant NSCLC patients with concurrent LKB1 loss had a higher number of metastatic sites at the time of diagnosis (median 2.5 vs. 2, P = 0.01), higher incidence of extrathoracic metastases (P = 0.01), and developed brain metastasis more frequently (48% vs. 25%, P = 0.02). There was a nonsignificant trend to worse survival in stage IV KRAS-mutant NSCLC patients with LKB1 loss. Conclusions: LKB1 IHC is a reliable and efficient assay to evaluate for loss of LKB1 in clinical samples of NSCLC. LKB1 loss is more common in smokers, and is associated with a more aggressive clinical phenotype in KRAS-mutant NSCLC patients, accordingly to preclinical models. Clin Cancer Res; 21(12); 2851–60. ©2015 AACR.

Integrity signals

Registry

Crossref · 10.1158/1078-0432.ccr-14-3112

Cites

50 of 50 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • LKB1 loss is prevalent in KRAS-mutant lung cancers, suggesting that oncogenic KRAS may upregulate one-carbon metabolism by undermining AMPK's inhibitory role in the folate cycle.

    “Of note, LKB1 loss is prevalent in KRAS mutant lung cancers46, indicating that oncogenic KRAS not only induces mTOR activity, but might also upregulate one-carbon metabolism by undermining AMPK’s inhibitory role in the folate cycle.”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Calles, A., Sholl, L. M., Rodig, S. J., Pelton, A. K., Hornick, J. L., Butaney, M., Lydon, C., Dahlberg, S. E., Oxnard, G. R., Jackman, D. M., & Jänne, P. A.
Affiliations
  • Dana-Farber Cancer Institute (US)
  • Brigham and Women's Hospital (US)
  • 1Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts.
Venue
Clinical Cancer Research
Published
2015-06-14
Volume
21
Issue
12
Pages
2851-2860
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2129277646
Cited by
115
References
50
Citations by year
2026: 2 · 2025: 12 · 2024: 7 · 2023: 9 · 2022: 14 · 2021: 16 · 2020: 12 · 2019: 11 · 2018: 10 · 2017: 6 · 2016: 13 · 2015: 3
FWCI
8.45
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Oncology › Lung Cancer Research Studies
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Diagnosis and Treatment
Keywords
LKB1 loss, KRAS-mutant non-small cell lung cancer, lung adenocarcinoma, Peutz-Jeghers syndrome, smoking, metastasis, brain metastases, prognostic factors, tumor aggressiveness
MeSH terms
Adenocarcinoma of Lung, AMP-Activated Protein Kinase Kinases, Adenocarcinoma, Adult, Aged, Aged, 80 and over, Carcinoma, Non-Small-Cell Lung, Female, Genotype, Humans, Immunohistochemistry, Lung Neoplasms, Male, Middle Aged, Mutation, Neoplasm Metastasis, Neoplasm Staging, Prognosis, Retrospective Studies, Risk Factors, Biomarkers, Proto-Oncogene Proteins p21(ras), Protein Serine-Threonine Kinases, Disease Progression, Cell Line, Tumor, Kaplan-Meier Estimate, Young Adult, High-Throughput Nucleotide Sequencing

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review