In the vast expanse of space, where the boundaries of human exploration are constantly being pushed, a critical question looms large: How does radiation impact the human body over time and distance? This is not merely a concern for lunar missions; it's a pivotal issue for any future endeavors to Mars. At the forefront of this inquiry are researchers at Western University and Canadian Nuclear Laboratories (CNL), who are developing innovative technologies to answer this question. Their work, which involves organ-on-chip and organoid-on-chip systems, is not only groundbreaking but also has profound implications for both space exploration and cancer treatment.
One of the key players in this collaboration is Tamie Poepping, a physics and astronomy professor at Western University. Poepping's lab specializes in building platforms that can control fluid at near-cellular scales, allowing researchers to isolate variables and monitor tissue behavior in real-time. Her organ- and organoid-on-chip devices, which replicate the complexity of human tissue inside transparent chambers no larger than a postage stamp, are foundational to the broader collaboration focused on radiation exposure. These devices enable researchers to study how organs respond to extreme environments, such as the conditions faced by astronauts in deep space.
Working alongside Poepping is Eugene Wong, another physics and astronomy professor at Western University. Wong's research focuses on how humans, organs, tissues, and cells respond to radiotherapy. By exposing these organs and organoids-on-chip to radiation, Wong can study the detailed biological effects and individual variations. His long-term goal is to better understand both acute and delayed tissue damage in cancer patients and those in extreme environments like deep space and nuclear reactors. Wong's connection to this research stretches back decades, with his work building upon the pioneering work of Jerry Battista, a professor emeritus in medical biophysics at Western University.
The collaboration also includes Christopher Pin, a professor in the departments of physiology, pharmacology, oncology, and pediatrics at Western's Schulich School of Medicine & Dentistry. Pin studies why patients with similar cancers can respond very differently to the same treatments. In his lab, Pin and his team grow organoids to study these differences directly. They have found that even within the same cancer type, responses to radiation and chemotherapy can vary dramatically. This variability is the problem that traditional models, from flat cell cultures to animal testing, often fail to replicate with enough precision.
At CNL, researchers Antonella Bertucci and Marcelo Vazquez are adapting these systems for radiobiology experiments related to emergency response and triage scenarios and space radiation exposure. The development of organ- or organoid-on-chip technology allows them to study the biological effects of different types of radiation using Earth-based laboratories or in space. Rather than measuring only whether cells survive radiation exposure, they can now observe intermediate biological responses like metabolites, cytokines, and stress markers that reveal how damage unfolds and how tissue attempts to recover.
The implications of this collaboration extend far beyond space travel. In cancer treatment, the work could help explain why identical radiation doses produce vastly different patient outcomes. In nuclear safety, it could improve how exposure is measured and how emergency responses are developed. This collaboration, partially supported by NSERC and Western's Institute for Earth and Space Exploration, will also engage trainees in research placements funded by collaborative grants at CNL in Chalk River, Ontario, this summer.
In my opinion, this collaboration is a testament to the power of interdisciplinary research. By bringing together experts from diverse fields, such as physics, astronomy, medicine, and engineering, Western University and CNL are pushing the boundaries of what's possible. Their work not only promises to advance our understanding of radiation exposure but also has the potential to revolutionize both space exploration and cancer treatment. Personally, I think this is a fascinating development that could have profound implications for the future of human exploration and healthcare.
