Nobel Prize in Physiology or Medicine 2025: A Landmark Achievement
Uncovering the secrets of immune tolerance has revolutionized medicine—and the journey to this breakthrough is as compelling as the discovery itself. But here’s where it gets controversial: many overlook the incredible teamwork and perseverance behind such scientific advancements.
On December 10, 2025, at the Nobel Prize banquet, Mary E. Brunkow delivered a heartfelt speech celebrating the laureates and their groundbreaking work.
She began by extending her gratitude to the Nobel Assembly at the Karolinska Institute and the Nobel Foundation for recognizing their contributions. She fondly recounted how, on October 6, amidst the chaos of late-night calls from Sweden, she was trying to sleep, while her colleague Fred Ramsdell—working in remote Wyoming—missed the global excitement altogether. Fortunately, Professor Shimon Sakaguchi, who lives in a time zone with better overlap with Sweden, took the call and engaged promptly. This timely response proved crucial, as their collective efforts culminated in the discovery of a vital mechanism underlying peripheral immune tolerance, an essential process that maintains immune system balance.
Brunkow shared her personal journey. After the biotech startup where she and Fred began their collaboration closed in early 2004, her career took various turns. Yet, amidst these changes, she witnessed how foundational work—in particular, Sakaguchi’s discoveries—helped uncover the critical role of the FOXP3 gene. This gene is now known to be indispensable for the development of regulatory T cells (or Tregs), which act as the immune system’s peacekeepers, preventing it from attacking the body’s own tissues.
Over the past two decades, innovative strategies have emerged to harness Tregs' power. Today, multiple clinical trials are underway to treat widespread health conditions by leveraging Treg activity. The outlook for effective treatments, and even potential cures, has never been more promising.
While her story highlights the importance of building upon decades of fundamental research—echoing Peter Medawar’s famous remark that our progress depends on the shoulders of those before us—what makes this achievement truly stand out is its origin. Despite being rooted in a small biotech firm’s efforts, the discoveries by Brunkow, Sakaguchi, and Ramsdell have germinated into broad scientific momentum, inspiring global advancements.
Brunkow emphasized the vital synergy between academic research and the private sector. Each plays a unique role: academia drives curiosity and foundational knowledge, while industry’s resources translate discoveries into real-world applications. The most significant breakthroughs often emerge from these collaborative efforts.
Expressing immense gratitude, she acknowledged the dedicated teams, collaborators, mentors, and funders who supported her journey. Recognizing the importance of representation, Brunkow paid special tribute to the role models who encouraged her as a woman in science. Her hope is to inspire her daughters and other young women to pursue their scientific passions, breaking barriers and fostering innovation.
Concluding her speech, Brunkow invited everyone to participate in Nobel Week events—including the Nobel lectures, Nobel Week Dialogue, the Oslo and Stockholm ceremonies, and the Nobel Peace Prize Forum—highlighting a celebration of scientific progress.
So, what do you think? Does this discovery mark a turning point in medicine, or are there still hurdles to overcome? Share your thoughts—your voice could shape the future of science!
