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Isolation of Cancer Stem Cells From Human Prostate Cancer Samples
07:16

Isolation of Cancer Stem Cells From Human Prostate Cancer Samples

Published on: March 14, 2014

Tumour-initiating stem-like cells in human prostate cancer exhibit increased NF-κB signalling

Vinagolu K Rajasekhar1, Lorenz Studer, William Gerald

  • 11] Stem Cell Center and Developmental Biology Program, Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA. [2] Sidney Kimmel Center for Prostate and Urologic Cancers, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York 10065, USA.

Nature Communications
|January 20, 2011
PubMed

Insights

Researchers discovered a rare type of prostate cancer stem cell (TIC) that resists hormone therapy. These stem-like cells, identified by specific markers, drive tumor growth and heterogeneity, offering new insights into prostate cancer molecular mechanisms.

Area of Science:

  • Oncology
  • Stem Cell Biology
  • Molecular Biology

Background:

  • Androgen depletion therapy is a primary treatment for human prostate cancer.
  • Hormone-independent cancer cells pose a significant therapeutic challenge.
  • Understanding treatment resistance is crucial for improving prostate cancer outcomes.

Purpose of the Study:

  • To identify and characterize stem-like cells within human prostate tumors that may drive treatment resistance.
  • To elucidate the characteristics and potential role of these cells in prostate cancer development and heterogeneity.
  • To investigate the molecular pathways, such as nuclear factor-κB activity, associated with these cells.

Main Methods:

  • Identification and purification of prostate tumor-initiating cells (TICs) using coexpression of TRA-1-60, CD151, and CD166.
  • Assessment of stem cell characteristics through in vitro sphere-formation assays.
  • Evaluation of multipotency and tumor-initiation potential via in vivo xenotransplantation studies.
  • Analysis of nuclear factor-κB activity in identified TICs.

Main Results:

  • A minor subset of stem-like TICs was identified, lacking typical prostate cancer markers (androgen receptor, prostate specific antigen).
  • These TICs demonstrated stem cell properties, including sphere formation and in vivo tumor initiation.
  • Purified triple-marker-positive TICs (TRA-1-60+, CD151+, CD166+) recapitulated original tumor heterogeneity in serial xenotransplants, suggesting a tumor hierarchy.
  • These TICs exhibited elevated nuclear factor-κB activity.

Conclusions:

  • Stem-like TICs lacking androgen receptor expression represent a potential source of treatment resistance in human prostate cancer.
  • These cells possess stem cell characteristics and contribute to tumor heterogeneity and development.
  • Targeting these specific TICs or associated pathways like nuclear factor-κB may offer novel therapeutic strategies for prostate cancer.

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