Prestigious Prize Recognizes Pioneering Body's Defenses Discoveries
The prestigious award in Physiology or Medicine was awarded for transformative findings that clarify how the body's defense network targets harmful pathogens while protecting the body's own cells.
Three esteemed scientists—from Japan Prof. Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—received this honor.
The work identified unique "security guards" within the immune system that eliminate malfunctioning defense cells that could harming the body.
The discoveries are now enabling innovative treatments for autoimmune diseases and malignancies.
These laureates will share a prize fund valued at 11m Swedish kronor.
Crucial Findings
"Their research has been essential for comprehending how the body's defenses functions and why we do not all develop serious self-attack conditions," commented the head of the award panel.
This team's research explain a core question: How does the defense system defend us from numerous infections while keeping our healthy cells unharmed?
The body's protection system uses white blood cells that search for indicators of infection, including viruses and bacteria it has never encountered.
Such defenders utilize sensors—known as receptors—that are produced by chance in countless combinations.
This provides the defense network the capacity to combat a wide array of invaders, but the unpredictability of the mechanism inevitably produces immune cells that can target the body.
Security Guards of the Body
Scientists previously understood that some of these problematic white blood cells were eliminated in the thymus—the site where immune cells mature.
The latest award honors the discovery of regulatory T-cells—described as the body's "security guards"—which travel through the system to neutralize other immune cells that attack the healthy cells.
It is known that this mechanism malfunctions in autoimmune diseases such as juvenile diabetes, MS, and RA.
A Nobel panel added, "The discoveries have laid the foundation for a new field of investigation and spurred the creation of innovative treatments, for example for tumors and autoimmune diseases."
In malignancies, regulatory T-cells prevent the body from attacking the growth, so studies are focused on lowering their numbers.
In self-attack disorders, trials are exploring boosting T-reg cells so the organism is no longer being harmed. A similar method could also be effective in minimizing the chances of organ transplant failure.
Pioneering Experiments
Prof Sakaguchi, from a Japanese institution, conducted experiments on rodents that had their immune gland extracted, leading to self-attack conditions.
He showed that injecting immune cells from healthy animals could prevent the disease—suggesting there was a mechanism for preventing defenders from harming the body.
Mary Brunkow, from the a research center in a US city, and Fred Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were studying an inherited immune disorder in mice and people that led to the discovery of a genetic factor vital for how T-regs operate.
"The groundbreaking work has revealed how the immune system is controlled by T-reg cells, stopping it from accidentally attacking the healthy cells," said a leading physiology specialist.
"This work is a remarkable example of how fundamental biological study can have far-reaching consequences for public health."
