Breakthroughs in Cancer Research at British Columbia Cancer Research Center

Strategic Insights -

Researchers at the British Columbia Cancer Research Center in Vancouver, Canada, have made significant contributions to cancer research in recent years. Their findings, published in various academic journals, have shed light on the genetic alterations and tumor microvasculature in different types of cancers.

Key Takeaways:

  • Whole-genome tiling-path array comparative genomic hybridization (CGH) has enabled the detection of gene-sized segmental DNA copy number gains and losses in various cancers, including oral squamous cell carcinomas (OSCC).
  • Analysis of 28 non-small cell lung carcinoma (NSCLC) cell models revealed novel regions of frequent duplication and deletion, implicating multiple novel oncogene loci on chromosome 7.
  • Chromosomal alterations, such as the loss of 3p and gain of 5p, were common to both squamous and adenocarcinoma subtypes, while multiple hotspots were more frequently associated with only one subtype.
  • Marrow-derived endothelial precursors rarely contribute to tumor vascularization, with the presence of an adult hemangioblast and rare differentiation of marrow stem cells toward the endothelial lineage.
  • Multiple microalterations were detected at high frequency in oral cancer, including whole-arm, segmental, and gene-sized alterations, with the presence of novel frequent submegabase alterations.
  • Tiling-path resolution array CGH has improved detection sensitivity and resolution compared to genome interval marker arrays for the detection of both submegabase and single copy gains and losses in cancer gene discovery.

Statistics:

  • 28 NSCLC cell models were analyzed using whole-genome tiling-path array CGH.
  • 20 OSCCs were analyzed, including a selection of matched normal DNA.
  • 45% of OSCCs showed the gain of a .58 Mb region at 5p15.2 containing TRIO.
  • Approximately 10^7 mononuclear cells contained endothelial precursors in human umbilical cord blood cells.

Sources:

  • Garnis, C., et al. "High resolution analysis of non-small cell lung cancer cell lines by whole genome tiling path array CGH." International Journal of Cancer, vol. 118, no. 6, 2006, pp. 1556-1564.
  • Larrivee, B., et al. "Minimal contribution of marrow-derived endothelial precursors to tumor vasculature." The Journal of Immunology, vol. 175, no. 5, 2005, pp. 2890-2899.
  • Baldwin, C., et al. "Multiple microalterations detected at high frequency in oral cancer." Cancer Research, vol. 65, no. 17, 2005, pp. 7561-7567.