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Updated: May 11, 2026
12:13
Sequencing Small Non-coding RNA from Formalin-fixed Tissues and Serum-derived Exosomes from Castration-resistant Prostate Cancer Patients
Published on: November 19, 2019
Punctuated evolution of prostate cancer genomes
Sylvan C Baca1, Davide Prandi, Michael S Lawrence
1Harvard Medical School, Boston, MA 02115, USA.
Cell
|April 30, 2013
Summary
Prostate cancer genomes reveal a phenomenon called chromoplexy, where DNA translocations and deletions interact. This coordinated disruption of multiple genes drives cancer progression and evolution.
Area of Science:
- Genomics
- Cancer Biology
- Molecular Oncology
Background:
- Exomic analysis of prostate cancer has identified mutated genes, but comprehensive genome-wide profiling is lacking.
- Understanding the full spectrum of somatic alterations is crucial for characterizing prostate cancer development.
Purpose of the Study:
- To comprehensively profile genome-wide somatic alterations in prostate tumors.
- To investigate the accumulation and interdependence of genomic alterations during oncogenesis and progression.
- To define and characterize a novel phenomenon termed "chromoplexy" in prostate cancer.
Main Methods:
- Whole-genome sequencing of 57 prostate tumors and matched normal tissues.
- Computational modeling to analyze the genesis and interdependence of genomic rearrangements.
- Characterization of the clonal hierarchy of genomic lesions.
Main Results:
- Identified abundant DNA translocations and deletions arising in an interdependent manner, termed chromoplexy.
- Chromoplexy frequently dysregulates prostate cancer genes by coordinately disrupting multiple genes.
- Modeling suggests chromoplexy drives significant genomic derangement through few events, supporting punctuated cancer evolution.
Conclusions:
- Chromoplexy is a key mechanism driving genomic instability and cancer gene dysregulation in prostate cancer.
- This phenomenon contributes to punctuated evolution in cancer, with significant implications for understanding oncogenesis.
- Characterizing the clonal hierarchy of lesions reveals chromoplexy's role in driving prostate carcinogenesis.
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