Prestigious Prize Recognizes Pioneering Immune System Discoveries
This year's prestigious award in Physiology or Medicine was granted for revolutionary discoveries that clarify how the immune system attacks harmful infections while sparing the healthy tissues.
Three renowned researchers—Japan's Shimon Sakaguchi and US experts Dr. Brunkow and Fred Ramsdell—share this accolade.
Their work uncovered specialized "sentinels" within the defense system that eliminate rogue immune cells capable of harming the organism.
The discoveries are now enabling new therapies for immune disorders and cancer.
These laureates will divide a prize fund worth 11m SEK.
Crucial Discoveries
"The research has been essential for comprehending how the immune system functions and why we do not all suffer from serious autoimmune diseases," stated the head of the Nobel Committee.
The team's studies explain a core mystery: How does the defense system defend us from numerous invaders while keeping our healthy cells intact?
Our immune system uses immune cells that scan for indicators of infection, even pathogens and germs it has never encountered.
Such cells utilize sensors—called recognition units—that are generated by chance in a vast number of combinations.
This gives the immune system the capacity to fight a wide array of threats, but the unpredictability of the mechanism unavoidably produces immune cells that can attack the host.
Security Guards of the Body
Researchers previously knew that some of these harmful white blood cells were destroyed in the thymus—the site where immune cells develop.
This year's Nobel Prize recognizes the identification of regulatory T-cells—known as the body's "peacekeepers"—which travel through the body to disarm any immune cells that assault the healthy cells.
We know that this mechanism malfunctions in self-attack conditions such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.
A prize committee stated, "The discoveries have established a new field of research and spurred the development of innovative treatments, for example for tumors and autoimmune diseases."
In malignancies, T-regs prevent the body from attacking the tumor, so studies are aimed at lowering their quantity.
For autoimmune diseases, trials are testing increasing T-reg cells so the organism is no longer being harmed. A comparable approach could also be effective in reducing the risks of organ transplant rejection.
Pioneering Studies
Professor Shimon Sakaguchi, from a Japanese institution, conducted experiments on mice that had their thymus extracted, leading to self-attack conditions.
He demonstrated that introducing immune cells from other animals could prevent the disease—suggesting there was a system for blocking immune cells from harming the host.
Dr. Brunkow, affiliated with the Institute for Systems Biology in a US city, and Dr. Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were investigating an genetic immune disorder in mice and people that led to the identification of a gene critical for how regulatory T-cells function.
"Their pioneering research has revealed how the immune system is kept in check by regulatory T cells, stopping it from accidentally targeting the healthy cells," said a prominent physiology expert.
"This work is a striking illustration of how basic biological research can have far-reaching implications for public health."
