5 Key Takeaways

• 1

  Researchers at the University of Chicago have developed methods to extract usable genetic information from 90-year-old medical specimens.

• 2

  The study focuses on colorectal cancer samples collected between 1932 and 2023, highlighting rising incidence in younger adults.

• 3

  The team optimized DNA extraction techniques to preserve fragmented DNA, enabling reconstruction and alignment to the human genome.

• 4

  In addition to tumor DNA, microbial DNA was analyzed, revealing shifts in gut bacteria linked to colorectal cancer over decades.

• 5

  The approach may allow for historical analysis of disease evolution and could be applied to other archived specimens beyond colorectal cancer.