Dr. Bruk Getachew
From Addis Ababa to the Frontier of Neuroscience
BIOGRAPHY
From Addis Ababa to the Frontier of Neuroscience: Dr. Bruk Getachew’s Journey of Curiosity, Courage, and Connection
Dr. Bruk Getachew’s story begins in Addis Ababa, Ethiopia, where his deep curiosity, even as a child, set the stage for his remarkable journey. Nurtured by his father—a teacher—who vividly explained scientific concepts, Bruk’s inquisitive mind was always at work. His relentless questioning earned him the nickname ‘the little philosopher.’ However, his childhood was abruptly interrupted by political unrest. Faced with the threat of forced conscription, his family sent him to the United States for safety and opportunity.
At just 15, Bruk arrived in Vancleve, Kentucky—a small rural town, a world away from the bustling Ethiopian capital. He attended a private boarding school there and quickly distinguished himself as a hard worker and thoughtful student. He graduated as a valedictorian and earned a scholarship to college. “Work became a joy,” he said. “It gave me purpose.”
Biography
Dr. Bruk Getachew’s story begins in Addis Ababa, Ethiopia, where his deep curiosity, even as a child, set the stage for his remarkable journey. Nurtured by his father—a teacher—who vividly explained scientific concepts, Bruk’s inquisitive mind was always at work. His relentless questioning earned him the nickname ‘the little philosopher.’ However, his childhood was abruptly interrupted by political unrest. Faced with the threat of forced conscription, his family sent him to the United States for safety and opportunity.
At just 15, Bruk arrived in Vancleve, Kentucky—a small rural town, a world away from the bustling Ethiopian capital. He attended a private boarding school there and quickly distinguished himself as a hard worker and thoughtful student. He graduated as a valedictorian and earned a scholarship to college. “Work became a joy,” he said. “It gave me purpose.”
Finding Science-and Himself-at Howard
Bruk initially followed the well-worn path of aspiring doctors, majoring in biology and preparing for a medical career. But a college professor, Dr. Larry G. Pappas, saw something more profound in him. “You’re built for graduate work and many discoveries await you,” the professor told him. Bruk took that encouragement to heart—and never forgot it. As a personal homage to his late professor, Bruk would later dedicate his academic path to that early belief in his potential.
When it was time for graduate school, Bruk chose Howard University. This decision was not just academic but also deeply symbolic. He had read about an Ethiopian doctor, Melaku Bayen -Emperor Haile Selassie’s personal physician and special emissary - who studied medicine at Howard in the 1930s and later returned home and founded the Ethiopian World Federation. He, along with his American wife, help fight colonial forces during the height of Italo-Ethiopian War. This inspiring story made Howard feel at home to Bruk.
At Howard, Bruk completed a master’s in genetics, focusing on the curious genetic link between alcohol- and nicotine-addiction. In clinical settings, patients with alcohol use disorder (AUD) frequently smoke cigarettes, up to 70%. “Why?” he wondered. “What’s the connection?” ‘Since alcohol doesn’t have its own receptors,’ he reasoned, ‘it might be activating nicotinic receptors to mediate some of its own effects.’ His early work helped frame that question, using rat models to explore whether nicotine receptors played a hidden role in alcohol preference and addition.
The Science of Why: Alcohol, Depression, and Gender Differences
Bruk’s scientific questions only grew more complex as he read the literature in-depth. Focusing on the possible role of biogenic amines in alcohol related depression. Thus, he decided to pursue a PhD in pharmacology under Dr. Yousef Tizabi. There research interest was to elucidate the possible causal relationship between alcohol use and depression. Particularly, whether alcohol use triggered depression—or whether depression drove alcohol use. Using rodent models and high-tech inhalation chambers, which was cutting-edge technology at the time, he began to trace the neurochemical fingerprints of each path.
He discovered gender-specific patterns that reflected what clinicians saw but couldn’t fully explain. In females, depressive behaviors often preceded alcohol consumption. In males, drinking tended to come first—followed by withdrawal-induced depression which often leads to drinking for self-medication. Bruk backed these findings with neurochemical data, linking alcohol withdrawal-induced depression with changes in serotonin, dopamine, and norepinephrine levels across different brain regions.
His research clarified a complex clinical picture. As he published more findings, other labs began adopting his methodologies, particularly the alcohol inhalation protocols he developed, which are now widely cited.
At the Mecca of Alcohol Research-and Beyond
After earning his doctorate, Bruk won a prestigious Institutional National Research Service Award, Postdoctoral Fellowship (T32) and headed to Indiana University School of Medicine, home to some of the most advanced animal alcohol research in the world. There, he worked with Dr. William McBride on the genetic aspects of AUD. He investigated how specific neurochemical pathways influenced alcohol consumption and susceptibility using selectively bred animal models.
But Bruk’s intellectual curiosity again led him beyond the lab’s original focus. Back at Howard, he rejoined a collaborative team that explored broader questions around neurotoxicity, neurodegeneration, and mood disorders. There, Bruk, along with Drs. Tizabi and Csoka began a series of conversations with microbiologist Dr. Karl Thompson—discussions he affectionately refers to as “academic jam sessions.”
The Gut-Brain Link and a Breakthrough Study
One of those sessions turned into a breakthrough. What if ketamine’s antidepressant effects weren’t only mediated though alterations of brain chemistry? What if the gut microbiota, ecosystem of trillions of microbes, played a role? What if ketamine treatment alters gut microbiota constitution?
The team examined how ketamine affected gut microbiota in rodent models of depression. Their study revealed that the antidepressant effect of ketamine is associated with changes in the gut microbiota where substantial elevation of beneficial bacteria such as butyrate-producing species and a reduction of harmful bacteria is observed.
Their publication was one of the first to show a possible gut-mediated mechanism for ketamine’s effects, and it became the most cited paper from their lab. “Science’s trajectory is not linear,” Bruk exclaimed. “You follow where it leads. Even if it’s into the gut.”
Pushing Boundaries with Organoids and MS Research
Today, Bruk is building on that work with a bold new focus: multiple sclerosis. Supported by the Karen Toffler Charitable Trust, he is exploring whether butyrate, a gut postbiotic, in combination with other neuroprotectants and antioxidants, can protect against demyelination, the breakdown of the protective sheath around neurons central to MS.
To simulate this in the lab, he’s using 3D brain organoids—miniature models of the brain grown in vitro. These models allow him to study the effects of environmental toxins and test whether compounds like butyrate or repurposed pharmaceuticals can block or reverse neural damage. “Organoids are the next frontier,” he said. “They’re helping us model the brain in ways we never could with simple cell cultures.”
This isn’t just theoretical. The drugs Bruk tests are already on the market, making the pathway to therapeutic use faster and more realistic. He believes combining drugs with complementary mechanisms could yield more efficacious and novel treatment strategies.
Mentoring the Next Generation and Expanding the Mission
Bruk isn’t doing this alone. He’s mentoring a graduate student using similar tools to explore the neurological impact of autism, particularly how microbial metabolites like propionic acid might influence neurodevelopment. They explore how early exposures affect synaptic protein expression and neural connectivity.
“I’m mentoring,” he asserted, “but I’m also learning. Every question leads to another.”
The Power of Risk, Freedom, and Purpose
Reflecting on the journey—from Ethiopia to Kentucky, from genetics to gut-brain science—Bruk speaks with heartfelt gratitude for the freedom he’s found through funding like the Karen Toffler Charitable Trust. “It’s not just about funds. It’s about having the space and the freedom to take risks, to pursue ideas others overlook.”
That support is already making waves. A study funded by the Trust has been accepted for publication, and Bruk is just getting started. He’s eager to contribute to Toffler’s collaborative ecosystem, where a cross-disciplinary exchange is the heart of innovation.
Rooted in Ethiopia, Growing in Every Direction
Though Bruk now teaches future doctors and leads research at Howard University, he never forgets where he came from. Ethiopia may not yet have a robust clinical research infrastructure. Still, it excels in agricultural science, another field born from necessity. “We learned to innovate with what we had,” Bruk said. “I carry that mindset into every experiment.”
In many ways, his work is a bridge—connecting systems, disciplines, generations and cultures. Like the philosopher he was nicknamed as a child, he continues to ask the big questions—fearlessly and with purpose; but this time, he also has to answer big questions, particularly, to his son Nathan.