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Effective modulation of stromal signaling through ROCK inhibition: Is it all in the timing?

Venessa T Chin1, Claire Vennin1,2, Paul Timpson1,2

  • 1The Kinghorn Cancer Centre, The Garvan Institute of Medical Research, Darlinghurst, Sydney, Australia.

Molecular & Cellular Oncology
|October 24, 2017
PubMed

Insights

Transiently inhibiting Rho-associated kinase signaling in pancreatic cancer stroma reduced tumor growth and metastasis. This approach also improved responses to standard therapies, suggesting a new treatment strategy.

Area of Science:

  • Oncology
  • Cancer Biology
  • Biochemistry

Background:

  • Pancreatic cancer is characterized by a dense desmoplastic stroma.
  • Stromal components, including Rho-associated kinase (ROCK) signaling, play a critical role in tumor progression and treatment resistance.

Purpose of the Study:

  • To investigate the therapeutic potential of transiently inhibiting Rho-associated kinase (ROCK) signaling in the tumor stroma of pancreatic cancer.
  • To evaluate the impact of ROCK inhibition on primary tumor growth, metastasis, and response to standard-of-care therapy.
  • To explore the utility of automated collagen organization analysis for predicting treatment response.

Main Methods:

  • In vivo studies using pancreatic cancer models.
  • Pharmacological inhibition of Rho-associated kinase (ROCK) signaling.
  • Assessment of primary tumor growth and metastatic spread.
  • Evaluation of response to standard-of-care chemotherapy.
  • Automated image analysis of stromal collagen organization in patient-derived tumors.

Main Results:

  • Transient inhibition of ROCK signaling in the stroma significantly reduced primary tumor growth in preclinical models.
  • ROCK inhibition led to a notable decrease in pancreatic cancer metastasis.
  • Combined ROCK inhibition and standard therapy enhanced treatment efficacy compared to standard therapy alone.
  • Tumor collagen organization patterns correlated with treatment response.

Conclusions:

  • Targeting stromal Rho-associated kinase (ROCK) signaling represents a promising therapeutic strategy for pancreatic cancer.
  • Transient ROCK inhibition can overcome treatment resistance and improve outcomes.
  • Automated collagen analysis may serve as a predictive biomarker for this novel therapeutic approach.
Keywords:
Extracellular matrixROCK inhibitorsRho GTPasepancreatic cancertailored therapy

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