A recellularized human colon model identifies cancer driver genes

Area of Science:

• Oncology
• Biomedical Engineering
• Genetics

Background:

• Current cancer models (cell lines, animals) have limitations in recapitulating human disease.
• There is a need for more accurate ex vivo models to bridge research gaps.
• Understanding gene cooperation in cancer progression is crucial for targeted therapies.

Purpose of the Study:

• To engineer an organotypic colon cancer model using recellularized native human tissue.
• To identify genes cooperating with mutant APC in driving invasive colorectal neoplasia.
• To validate novel invasion-driver genes in vitro and ex vivo.

Main Methods:

• Recellularization of native human colon matrix with cell-populated mucosa.
• Engineering an organotypic colon cancer model with intact muscularis mucosa.
• Performing a Sleeping Beauty transposon mutagenesis screen in the model.
• In vitro and ex vivo validation of candidate invasion-driver genes.

Main Results:

• The organotypic model recapitulated pathophysiological progression from neoplasia to invasive tumor.
• A mutagenesis screen identified 38 candidate invasion-driver genes cooperating with mutant APC.
• 17 previously implicated colorectal cancer genes and 6 novel genes were identified.
• Six novel invasion-driver genes were validated using proliferation, migration, and invasion assays.

Conclusions:

• The engineered organotypic colon cancer model accurately reflects human tumor progression.
• The model is a powerful tool for genetic screens to identify cancer drivers.
• This study identified novel genes involved in colorectal cancer invasion, offering therapeutic targets.