How are engineered bacteria being used to fight cancer?

Engineered bacteria are being developed to target and break down cancerous tissue from the inside out, specifically within the low-oxygen core of solid tumors.

What is Clostridium sporogenes and why is it used?

Clostridium sporogenes is a soil bacterium that naturally thrives in oxygen-free environments, making it suitable for colonizing the core of solid tumors.

How is the risk of engineered bacteria growing uncontrollably managed?

A quorum sensing system is employed to control the activation of an oxygen-tolerance gene, ensuring the bacteria only gain enhanced survival abilities once they reach a sufficient population size within the tumor.

Home / Science / Engineered Bacteria Eat Tumors From Within

Engineered Bacteria Eat Tumors From Within

24 Feb

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Summary

Bacteria engineered to survive in low-oxygen tumor cores.
Gene controls oxygen tolerance, activated by bacterial population.
Further testing planned in pre-clinical tumor models.

Engineered Bacteria Eat Tumors From Within

Scientists have engineered bacteria to attack tumors internally, potentially revolutionizing cancer treatment. This innovative method targets the oxygen-free environment found within solid cancers.

The research utilizes Clostridium sporogenes, a soil-dwelling bacterium naturally suited for low-oxygen conditions. By genetically modifying these bacteria, scientists aim to enhance their ability to colonize and break down tumor tissue from within.

A critical challenge addressed is the bacteria's limited survival in slightly oxygenated tumor edges. Researchers engineered the bacteria with an oxygen-tolerance gene, but coupled it with a quorum sensing system. This ensures the gene only activates when a sufficient bacterial population is established inside the tumor, preventing uncontrolled growth in oxygen-rich body areas.