Christopher Brownlee, a researcher in the Department of Pharmacological Sciences at Stony Brook University, focuses his work on understanding how cells grow, divide, and interact with their environment. His research uses the Xenopus system—an African frog model known for its large single cells—to investigate fundamental cellular processes.
Brownlee describes his approach as deeply interdisciplinary. “Our department has a really strong culture of interdisciplinary research,” he said. He credits collaboration with colleagues from various fields as essential to advancing his lab’s projects. Collaborations with engineers have helped refine microfluidic devices, while partnerships with clinicians ensure that discoveries remain relevant to human disease.
Central to Brownlee’s research is the relationship between the plasma membrane and cytoplasm within cells. He likens this dynamic to a factory: “We basically study how this wall tells the machinery where to go and how big to grow,” Brownlee explained. Disruptions in communication between these cellular components can lead to diseases such as cancer and developmental disorders.
The use of Xenopus allows Brownlee’s team to manipulate cell contents more easily than in other systems. By employing microfluidics, they repackage cytoplasm into droplets that mimic artificial cells, enabling controlled studies of cellular organization. These findings are then tested in human and mammalian cells for broader relevance.
In addition to these methods, Brownlee’s lab utilizes optogenetics—a technique that uses light to control protein activity inside cells. This enables real-time experiments on how changes affect cellular behavior. “Traditional methods often involve observation and recording,” he said. “Optogenetics allows us to test causality dynamically.”
Brownlee’s long-term goal is to reveal general principles governing cell organization during development, regeneration, and disease by combining quantitative experimentation with precise manipulations in model systems like Xenopus.
