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Updated: Jan 16, 2026

Induction and Analysis of Epithelial to Mesenchymal Transition
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TIMP-1 Modulation Correlates with KRAS Dependency and EMT Induction in NSCLC

Ilamathi M-Thirusenthilarasan1, Pankaj Ahluwalia2, Nithyananda Thorenoor1

  • 1Department of Pathology, Penn State College of Medicine, Hershey, PA 17033, USA.

Cells
|September 26, 2025
PubMed

Insights

Tissue inhibitor of metalloproteinase-1 (TIMP-1) inversely correlates with Kirsten rat sarcoma viral oncogene homolog (KRAS) in non-small cell lung carcinoma (NSCLC). TIMP-1 modulation impacts KRAS dependency, apoptosis, and EMT, offering therapeutic insights.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Genetics

Background:

  • Kirsten rat sarcoma viral oncogene homolog (KRAS) mutations are prevalent in human cancers, particularly non-small cell lung carcinoma (NSCLC).
  • KRAS dependency is crucial for tumor survival, but tumors can develop resistance.
  • Tissue inhibitor of metalloproteinase-1 (TIMP-1) has diverse roles beyond matrix metalloproteinase inhibition and is linked to cancer progression.

Purpose of the Study:

  • To investigate the relationship between TIMP-1 modulation and KRAS dependency in NSCLC.
  • To explore how TIMP-1 influences KRAS expression and associated cellular behaviors.
  • To elucidate potential mechanisms of therapeutic resistance in KRAS-mutated NSCLC.

Main Methods:

  • Analysis of KRAS and TIMP-1 expression in NSCLC cell lines.
  • Experimental modulation of TIMP-1 levels (overexpression and knockdown).
  • Assessment of KRAS dependency, RAS-GTP levels, apoptosis, and epithelial-mesenchymal transition (EMT) markers.
  • Bioinformatic analysis of KRAS and TIMP-1 variant-specific expression.

Main Results:

  • An inverse correlation between KRAS and TIMP-1 expression was observed in NSCLC lines.
  • TIMP-1 modulation altered KRAS levels, RAS-GTP activity, and KRAS dependency.
  • TIMP-1 overexpression reduced apoptosis in KRAS-dependent cells, while TIMP-1 knockdown increased apoptosis in KRAS-independent cells upon KRAS ablation.
  • TIMP-1 modulation affected EMT marker expression, suggesting a role in EMT induction in KRAS-independent cells.

Conclusions:

  • TIMP-1 plays a significant role in regulating KRAS dependency and tumor behavior in NSCLC.
  • TIMP-1 modulation influences critical cancer hallmarks like apoptosis and EMT.
  • Understanding the KRAS-TIMP-1 interaction may reveal novel therapeutic strategies for NSCLC.
Keywords:
KRASTIMP-1epithelial–mesenchymal transitionnon-small cell lung carcinomaoncogene addiction

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