Medical Science Develops Microbes to Devour Cancer Tumors
- Feb 25
- 2 min read
In a groundbreaking fusion of life sciences and engineering, researchers at the University of Waterloo are developing a novel oncology tool: utilizing engineered "hungry" microbes to literally consume cancer tumors from the inside out.
The innovative strategy centers on Clostridium sporogenes, a common soil-dwelling bacterium that only survives in environments completely devoid of oxygen. The inner core of a solid tumor is heavily comprised of dead cells and lacks oxygen, naturally providing a perfect breeding ground for this specific microbe.
"Bacteria spores enter the tumor, finding an environment where there are lots of nutrients and no oxygen... and so it starts eating those nutrients and growing in size," explained Dr. Marc Aucoin, a chemical engineering professor at Waterloo. Essentially, the growing bacterial colony clears the body of the tumor from its central space.
However, the team had to overcome a major biological barrier. As the microbes expanded toward the tumor's outer edges, they encountered low levels of oxygen and died before fully destroying the cancer. To solve this, researchers introduced an oxygen-tolerant gene from a related bacterium, allowing the microbes to survive longer near the oxygen-exposed tumor edges.
To ensure patient safety and prevent these microbes from spreading into oxygen-rich areas like the bloodstream, the team utilized "quorum sensing"—a natural chemical communication process used by bacteria. The bacteria are programmed so that the protective oxygen-resistant gene only activates when a massive cluster of bacteria has accumulated deep inside the tumor.
"Using synthetic biology, we built something like an electrical circuit, but instead of wires we used pieces of DNA," said Dr. Brian Ingalls, a professor of applied mathematics at Waterloo.
Following successful studies on oxygen tolerance and quorum sensing, the interdisciplinary team—in partnership with Toronto-based CREM Co Labs—now plans to combine these DNA circuits into a single bacterium. This carefully programmed biological attack will soon move to pre-clinical trials, potentially offering the medical world a revolutionary new way to defeat cancer.
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Keywords: Microbes to Devour Cancer Tumors
Microbes to Devour Cancer Tumors
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