Prestigious Prize Recognizes Pioneering Body's Defenses Discoveries
This year's Nobel Prize in Physiology or Medicine has been awarded for revolutionary discoveries that illuminate how the body's defense network targets dangerous infections while sparing the body's own cells.
A trio of renowned researchers—from Japan Prof. Sakaguchi and US scientists Mary Brunkow and Fred Ramsdell—received this honor.
Their research uncovered specialized "sentinels" within the immune system that eliminate rogue immune cells capable of attacking the body.
The discoveries are now paving the way for innovative therapies for autoimmune diseases and cancer.
These winners will share a monetary award worth 11 million Swedish kronor.
Crucial Findings
"Their work has been essential for understanding how the body's defenses operates and the reason we do not all develop serious self-attack conditions," stated the chair of the Nobel Committee.
The team's studies address a fundamental mystery: How does the immune system defend us from numerous invaders while leaving our own tissues unharmed?
The body's protection system uses white blood cells that scan for indicators of infection, even viruses and germs it has never encountered.
These cells employ sensors—called receptors—that are generated randomly in countless combinations.
That provides the immune system the capacity to fight a broad range of threats, but the unpredictability of the mechanism unavoidably produces immune cells that may attack the host.
Security Guards of the Immune System
Researchers previously understood that a portion of these problematic defense cells were eliminated in the immune organ—where immune cells mature.
The latest Nobel Prize recognizes the discovery of T-reg cells—known as the immune system's "peacekeepers"—which patrol the system to disarm any immune cells that assault the body's own tissues.
It is known that this process fails in self-attack conditions such as juvenile diabetes, multiple sclerosis, and rheumatoid arthritis.
A Nobel panel stated, "These findings have established a new field of investigation and accelerated the creation of new therapies, for instance for tumors and autoimmune diseases."
Regarding malignancies, T-regs block the body from fighting the tumor, so research are focused on reducing their numbers.
For autoimmune diseases, trials are exploring boosting T-reg cells so the organism is not being harmed. A comparable method could also be useful in reducing the risks of transplanted organ rejection.
Innovative Studies
Professor Sakaguchi, of a Japanese institution, conducted experiments on mice that had their thymus removed, causing autoimmune disease.
The researcher showed that introducing defense cells from other mice could stop the illness—suggesting there was a mechanism for preventing defenders from attacking the host.
Mary Brunkow, from the Institute for Systems Biology in Seattle, and Fred Ramsdell, now at Sonoma Biotherapeutics in San Francisco, were studying an genetic autoimmune disease in rodents and people that resulted in the identification of a gene vital for the way T-regs function.
"Their pioneering research has uncovered how the body's defenses is kept in check by regulatory T cells, stopping it from accidentally targeting the body's own tissues," commented a leading biological science expert.
"This research is a remarkable illustration of how basic biological study can have broad implications for public health."
