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An Orthotopic Murine Model of Human Prostate Cancer Metastasis
06:48

An Orthotopic Murine Model of Human Prostate Cancer Metastasis

Published on: September 18, 2013

35.9K

Frequent clonal relations between metastases and non-index prostate cancer lesions

Jeroen Kneppers1,2, Oscar Krijgsman2,3, Monique Melis4

  • 1Division of Oncogenomics, Netherlands Cancer Institute, Amsterdam, Netherlands.

JCI Insight
|January 25, 2019
PubMed

Insights

Focal therapy for prostate cancer may undertreat patients, as regional metastases can arise from non-ablated primary lesions. This study found that in nearly a quarter of cases, metastases were not linked to the main tumor, suggesting a need for broader treatment strategies.

Area of Science:

  • Oncology
  • Urology
  • Cancer Genomics

Background:

  • Prostate cancer is characterized by clonal heterogeneity in primary lesions, while metastases are often monoclonal.
  • Preventing distant metastases is crucial for improving prostate cancer survival rates.
  • Focal therapy targets the primary index lesion, but its efficacy against subsequent metastasis from other primary lesions is unknown.

Purpose of the Study:

  • To investigate the clonal relationship between primary prostate cancer lesions and regional lymph node metastases.
  • To determine if focal ablation of the index lesion is sufficient for treating prostate cancer.

Main Methods:

  • Comparative analysis of copy number aberration profiles.
  • Examination of primary prostate cancer lesions and matching pelvic lymph node metastases from 30 patients.
  • Establishment of clonality between metastases and multiple primary lesions within the same patient.

Main Results:

  • In 23.3% of patients, regional metastases were not clonally linked to the index primary lesion.
  • This suggests that metastases can originate from primary lesions not targeted by focal therapy.
  • The findings challenge the assumption of a single clonal origin for metastases in prostate cancer.

Conclusions:

  • Focal ablation of only the index prostate cancer lesion may be an undertreatment for a significant patient subset.
  • The study highlights the importance of considering multifocal disease in prostate cancer treatment planning.
  • Further research is needed to refine treatment strategies for multifocal prostate cancer to prevent metastatic outgrowth.
Keywords:
GeneticsOncologyProstate cancer

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