University of Waterloo engineers “hungry” bacteria to infiltrate and consume solid tumors from the inside out

University of Waterloo researchers use "hungry" bacteria to destroy tumors from within. Learn how synthetic biology is creating a new weapon against cancer.

By: AXL Media

Published: Feb 24, 2026, 8:01 AM EST

Source: The information in this article was sourced from University of Waterloo

The Breaking Development

A multidisciplinary team of scientists has successfully redesigned soil-dwelling bacteria to act as a living internal treatment for solid cancer tumors. According to Dr. Marc Aucoin, a professor of chemical engineering at the University of Waterloo, the engineered microbes are designed to infiltrate the nutrient-rich, oxygen-depleted centers of tumors. Once inside, the bacteria begin to multiply and consume the tumor mass from within, offering a radical new method for eliminating cancerous growths that are often resistant to traditional therapies due to their dense, anaerobic cores.

Background and Context

The research centers on Clostridium sporogenes, a bacterium that naturally thrives in environments devoid of oxygen. Solid tumors often outgrow their blood supply, creating a central "dead zone" that lacks oxygen but is rich in nutrients, making it the perfect habitat for these microbes. Historically, the use of such bacteria in medicine was limited because they would die upon reaching the oxygenated edges of a tumor. To solve this, the Waterloo team utilized synthetic biology to insert specific genes that grant the bacteria increased tolerance to oxygen, allowing for a more thorough eradication of the cancer.

Key Players and Stakeholders

The project is a collaborative effort involving experts in chemical engineering, applied mathematics, and microbiology. Key figures include Dr. Brian Ingalls and PhD student Bahram Zargar, who worked alongside researchers from the Center for Research on Environmental Microbiology (CREM Co Labs). According to the team, the project represents a significant fusion of mathematics and life sciences, where DNA sequences are treated like components in an electrical circuit to program predictable biological behaviors within the microbes.