Nobel Prize Recognizes Pioneering Immune System Research
The Nobel Prize in Physiology or Medicine has been awarded for transformative discoveries that illuminate how the immune system attacks harmful infections while sparing the healthy tissues.
A trio of renowned researchers—from Japan Shimon Sakaguchi and US scientists Dr. Brunkow and Dr. Ramsdell—share this honor.
The work uncovered unique "security guards" within the immune system that eliminate rogue defense cells capable of harming the body.
These findings are now enabling new therapies for immune disorders and malignancies.
These winners will divide a prize fund valued at 11 million SEK.
Crucial Findings
"The work has been decisive for understanding how the immune system functions and why we don't all suffer from severe autoimmune diseases," stated the chair of the Nobel Committee.
This trio's research address a fundamental question: In what way does the defense system protect us from countless infections while leaving our healthy cells unharmed?
The immune system employs immune cells that scan for signs of disease, including pathogens and bacteria it has not met before.
These cells utilize detectors—known as receptors—that are produced randomly in a vast number of combinations.
That provides the defense network the ability to fight a wide array of invaders, but the unpredictability of the mechanism unavoidably creates immune cells that may target the host.
Protectors of the Body
Scientists earlier understood that some of these problematic white blood cells were eliminated in the immune organ—the site where immune cells mature.
The latest award recognizes the identification of regulatory T-cells—known as the body's "peacekeepers"—which patrol the system to neutralize other defenders that attack the healthy cells.
We know that this process malfunctions in autoimmune diseases such as juvenile diabetes, multiple sclerosis, and RA.
The prize committee added, "These discoveries have established a new field of research and accelerated the creation of new therapies, for example for tumors and autoimmune diseases."
Regarding malignancies, T-regs block the system from fighting the growth, so research are focused on lowering their numbers.
In autoimmune diseases, trials are testing increasing regulatory T-cells so the body is no longer being harmed. A comparable method could also be effective in reducing the chances of transplanted organ failure.
Pioneering Studies
Professor Shimon Sakaguchi, from a Japanese institution, conducted tests on rodents that had their thymus extracted, leading to self-attack conditions.
The researcher showed that introducing immune cells from other mice could prevent the illness—implying there was a system for blocking defenders from attacking the body.
Dr. Brunkow, affiliated with the Institute for Systems Biology in Seattle, and Dr. Ramsdell, currently at a biotech firm in a California city, were studying an inherited immune disorder in mice and humans that resulted in the discovery of a genetic factor critical for how regulatory T-cells operate.
"The groundbreaking research has revealed how the body's defenses is controlled by T-reg cells, stopping it from mistakenly attacking the body's own tissues," commented a prominent physiology expert.
"This work is a striking illustration of how basic physiological study can have far-reaching consequences for human health."
