Prestigious Award Honors Pioneering Body's Defenses Research

This year's prestigious award in Physiology or Medicine has been granted for revolutionary discoveries that clarify how the body's defense network attacks harmful infections while protecting the healthy tissues.

A trio of renowned scientists—Japan's Prof. Sakaguchi and American experts Mary Brunkow and Fred Ramsdell—share this accolade.

The research identified specialized "sentinels" within the defense system that eliminate rogue defense cells capable of harming the body.

These discoveries are now paving the way for innovative therapies for immune disorders and cancer.

These winners will divide a prize fund valued at 11m SEK.

Crucial Discoveries

"Their research has been decisive for understanding how the body's defenses functions and why we do not all develop severe self-attack conditions," commented the chair of the award panel.

The team's studies explain a core question: In what way does the defense system defend us from countless infections while leaving our own tissues unharmed?

The immune system employs immune cells that search for indicators of infection, even pathogens and bacteria it has not met before.

These defenders employ sensors—known as receptors—that are generated randomly in a vast number of combinations.

This provides the immune system the ability to fight a wide array of invaders, but the unpredictability of the process unavoidably creates white blood cells that can attack the body.

Security Guards of the Immune System

Scientists earlier knew that some of these harmful white blood cells were destroyed in the thymus—where immune cells develop.

The latest award honors the identification of regulatory T-cells—known as the body's "security guards"—which travel through the system to neutralize other defenders that attack the body's own tissues.

We know that this mechanism malfunctions in autoimmune diseases such as type-1 diabetes, multiple sclerosis, and rheumatoid arthritis.

The Nobel panel added, "These findings have laid the foundation for a new field of investigation and accelerated the development of innovative treatments, for instance for tumors and autoimmune diseases."

In malignancies, T-regs block the body from fighting the tumor, so research are focused on lowering their quantity.

In self-attack disorders, experiments are exploring increasing T-reg cells so the organism is not under attack. A similar approach could also be effective in reducing the risks of organ transplant failure.

Innovative Experiments

Professor Shimon Sakaguchi, of a Japanese institution, conducted tests on mice that had their thymus removed, causing autoimmune disease.

The researcher demonstrated that injecting defense cells from other mice could prevent the disease—implying there was a mechanism for blocking immune cells from attacking the body.

Dr. Brunkow, affiliated with the Institute for Systems Biology in a US city, and Fred Ramsdell, currently at a biotech firm in a California city, were studying an genetic autoimmune disease in rodents and humans that resulted in the identification of a gene vital for how T-regs operate.

"The pioneering work has uncovered how the body's defenses is kept in check by T-reg cells, preventing it from accidentally attacking the healthy cells," commented a prominent physiology specialist.

"The work is a remarkable example of how fundamental biological study can have broad implications for human health."