Peering Inside the Nucleus: Breakthrough in Genomic Research

Strategic Insights -

Scientists at the University of Southern California (USC) have developed a revolutionary method for generating three-dimensional models of the entire DNA strand of a cell, known as a genome. This breakthrough allows researchers to gain a better understanding of the structure and function of the genome, which plays a crucial role in the functions of almost all human cells. Flaws in the genome's structure are thought to cause various disorders, including cancer. The new approach may offer insights into the causes of cancer and potentially enable the identification of cancerous cells based on structural defects in the cell's genome.

Key Takeaways:

  • The USC researchers have developed a method for generating accurate three-dimensional models of the entire DNA strand of a cell, known as a genome.
  • The genome is crucial to understanding its function as a whole, and understanding its structure is essential to understanding its function.
  • The technique used by the USC team takes into account the fact that each cell is slightly different, and the DNA does not always scrunch in the exact same way.
  • The study found that there is not a single structure of a genome, but rather "preferred positions" for the DNA strand, providing an idea of how it is most likely to appear.
  • The work has the potential to enable the identification of cancerous cells based on structural defects in the cell's genome.
  • The study also allows scientists to see where each gene is located relative to any other gene, and how this arrangement is important to cellular functions.
  • The method used by the USC team plots out the location of each DNA-on-DNA contact and uses sophisticated computer algorithms to model the results in 3D.
  • The study was supported by the Human Frontier Science Program, the Alfred P. Sloan Foundation, the National Institutes of Health, and the Pew Charitable Trusts.
  • Lin Chen, professor of molecular biology at USC, added that the new approach "provides you with a completely new prospective in the genome."
  • Frank Alber, assistant professor of Computational Biology at USC, noted that the technique is not a single structure of a genome, but rather "preferred positions" for the DNA strand.

Statistics:

  • The genomic DNA strand can be unraveled to stretch more than 30 miles long, if a nucleus were the size of a soccer ball.
  • The DNA forms hundreds of millions of contacts with itself, making it difficult to visualize in 3D.
  • The researchers used sophisticated computer algorithms to model the results in 3D, providing a new perspective on the genome.
  • The study was published on the Nature Biotechnology website on December 25 ahead of its publication in the print edition.
  • The team of researchers included Reza Kalhor, Harianto Tjong, and Nimanthi Jayathilaka, in addition to Chen and Alber.

Sources:

  • University of Southern California
  • Nature Biotechnology
  • Human Frontier Science Program
  • Alfred P. Sloan Foundation
  • National Institutes of Health
  • Pew Charitable Trusts