Nobel Award Recognizes Pioneering Body's Defenses Discoveries

The Nobel Prize in medical science was awarded for revolutionary discoveries that illuminate how the immune system targets dangerous infections while sparing the body's own cells.

A trio of esteemed researchers—Japan's Shimon Sakaguchi and US scientists Dr. Brunkow and Fred Ramsdell—share this accolade.

Their work uncovered unique "sentinels" within the defense system that eliminate rogue immune cells capable of harming the body.

These findings are now paving the way for new treatments for immune disorders and cancer.

The winners will share a monetary award valued at 11m Swedish kronor.

Decisive Findings

"The work has been decisive for understanding how the body's defenses functions and the reason we do not all develop serious autoimmune diseases," commented the head of the Nobel Committee.

This team's research explain a fundamental question: How does the defense system defend us from countless infections while keeping our own tissues unharmed?

Our body's protection system employs white blood cells that scan for indicators of disease, including viruses and bacteria it has not met before.

These cells utilize sensors—known as recognition units—that are generated by chance in a vast number of variations.

This gives the immune system the capacity to fight a broad range of threats, but the unpredictability of the mechanism inevitably produces white blood cells that can target the body.

Protectors of the Immune System

Scientists earlier knew that some of these problematic white blood cells were destroyed in the immune organ—the site where immune cells mature.

This year's award recognizes the discovery of T-reg cells—described as the body's "security guards"—which patrol the body to disarm any defenders that attack the healthy cells.

It is known that this process malfunctions in self-attack conditions such as juvenile diabetes, multiple sclerosis, and RA.

The prize committee added, "These discoveries have laid the foundation for a novel area of investigation and spurred the development of innovative therapies, for example for tumors and immune disorders."

Regarding cancer, T-regs block the body from fighting the tumor, so research are aimed at lowering their quantity.

For self-attack disorders, experiments are testing boosting regulatory T-cells so the organism is no longer under attack. A comparable approach could also be useful in minimizing the chances of organ transplant failure.

Pioneering Experiments

Prof Shimon Sakaguchi, from a Japanese institution, performed experiments on rodents that had their thymus extracted, causing autoimmune disease.

The researcher demonstrated that introducing immune cells from other mice could stop the disease—suggesting there was a mechanism for preventing immune cells from attacking the host.

Mary Brunkow, affiliated with the a research center in Seattle, and Dr. Ramsdell, currently at a biotech firm in San Francisco, were investigating an genetic autoimmune disease in rodents and humans that resulted in the identification of a genetic factor vital for how T-regs operate.

"Their pioneering work has revealed how the body's defenses is controlled by regulatory T cells, stopping it from accidentally targeting the healthy cells," said a prominent biological science expert.

"This research is a remarkable illustration of how fundamental physiological study can have broad consequences for public health."