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Pancreatic cancer-associated stellate cells: A viable target for reducing immunosuppression in the tumor

Thomas A Mace1, Mark Bloomston, Gregory B Lesinski

  • 1Division of Medical Oncology; Department of Internal Medicine; The Ohio State University; Columbus, OH USA.

Oncoimmunology
|September 28, 2013
PubMed

Insights

Pancreatic stellate cells release interleukin-6 (IL-6) to increase immunosuppressive myeloid cells through STAT3 signaling. Targeting this IL-6/JAK/STAT3 pathway may enhance pancreatic cancer immunotherapy effectiveness.

Area of Science:

  • Oncology
  • Immunology
  • Cancer Biology

Background:

  • Pancreatic cancer is characterized by a suppressive tumor microenvironment.
  • Stellate cells within the tumor stroma play a critical role in promoting immune evasion.

Purpose of the Study:

  • To investigate the role of pancreatic stellate cell-derived factors in immune suppression.
  • To explore the IL-6/JAK/STAT3 signaling pathway's involvement in myeloid-derived suppressor cell accumulation.
  • To assess the potential of targeting this pathway for pancreatic cancer immunotherapy.

Main Methods:

  • Analysis of soluble factors secreted by pancreatic cancer-associated stellate cells.
  • Investigation of signal transducer and activator of transcription 3 (STAT3) dependent mechanisms.
  • Evaluation of the IL-6/JAK/STAT3 signaling axis in the tumor stroma.

Main Results:

  • Pancreatic stellate cells secrete interleukin-6 (IL-6).
  • IL-6 promotes the accumulation of myeloid-derived suppressor cells.
  • This accumulation is dependent on the STAT3 signaling pathway.

Conclusions:

  • The IL-6/JAK/STAT3 pathway in the tumor stroma contributes to local immunosuppression in pancreatic cancer.
  • Targeting this signaling axis presents a potential strategy to enhance immunotherapy efficacy for pancreatic cancer.
Keywords:
IL-6STAT3immunosuppressionmyeloid-derived suppressor cellspancreatic cancer stellate cells

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