Temporally resolved proteomics identifies nidogen-2 as a cotarget in pancreatic cancer that modulates fibrosis and therapy response

  • 0Cancer Ecosystems Program, Garvan Institute of Medical Research and The Kinghorn Cancer Centre, Darlinghurst, New South Wales, Australia.

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Summary

This summary is machine-generated.

Nidogen-2 (NID2) promotes pancreatic ductal adenocarcinoma (PDAC) progression by increasing tumor fibrosis and stiffness. Reducing NID2 in cancer-associated fibroblasts (CAFs) impairs invasion, reduces metastasis, and improves treatment response in preclinical models.

Area Of Science

  • Oncology
  • Cancer Biology
  • Biochemistry

Background

  • Pancreatic ductal adenocarcinoma (PDAC) is marked by significant fibrosis, which can drive tumor progression and metastasis.
  • The tumor microenvironment, particularly the extracellular matrix (ECM), plays a crucial role in PDAC.
  • Understanding the temporal changes in the ECM (matrisome) is vital for identifying therapeutic targets.

Purpose Of The Study

  • To conduct an unbiased temporal assessment of the matrisome in distinct pancreatic cancer mouse models.
  • To identify key ECM components contributing to PDAC metastasis and progression.
  • To evaluate the therapeutic potential of targeting identified ECM components.

Main Methods

  • Utilized mass spectrometry proteomics for unbiased temporal matrisome assessment in KPC and KPflC mouse models.
  • Employed biomechanical assessments, second harmonic generation imaging, and birefringence analysis to evaluate matrix properties.
  • Used CRISPR interference (CRISPRi) for NID2 knockdown in cancer-associated fibroblasts (CAFs).
  • Performed intravital imaging and orthotopic implantation in mouse models to assess tumor progression and metastasis.

Main Results

  • Identified increased abundance of nidogen-2 (NID2) in the highly metastatic KPC model compared to the poorly metastatic KPflC model.
  • Demonstrated that NID2 is primarily expressed by CAFs within the tumor microenvironment.
  • Showed that NID2 reduction in CAFs decreased tumor stiffness and matrix remodeling, impairing cancer cell invasion.
  • Observed improved vascular patency and enhanced response to gemcitabine/Abraxane in NID2-depleted tumors.
  • Found reduced liver metastasis and increased survival in orthotopic models with NID2-depleted tumors.

Conclusions

  • Nidogen-2 (NID2) is a key contributor to pancreatic ductal adenocarcinoma (PDAC) progression and metastasis.
  • Targeting NID2 in cancer-associated fibroblasts (CAFs) represents a promising therapeutic strategy for PDAC.
  • NID2 inhibition can reduce tumor stiffness, enhance drug delivery, and decrease metastatic spread, highlighting its potential as a PDAC cotarget.