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Can a New Treatment Reverse Autoimmune Diseases?
by Sophia Cariati

A new treatment has cured type 1 diabetes in mice by stopping their own killer immune systems from turning on themselves and allowing the insulin- producing cells of the pancreas to regenerate. The research promises to yield improved therapies for people afflicted by this and other autoimmune diseases including Crohn's disease, lupus, and rheumatoid arthritis.

"This is the first time anyone has ever been able to reverse established diabetes and literally regrow the affected organ," said Denise Faustman, M.D., Ph.D., of Harvard Medical School, lead investigator of the study and Chair of the Board of Directors of the Society for Women's Health Research. "This same therapy may be feasible in humans."

The ABCs of Autoimmunity
The immune system normally springs to action when bacteria, viruses and other unfamiliar cells invade the body. Yet in autoimmune diseases the body attacks its own healthy tissue. For unexplained reasons, women's immune systems are more likely than men's to turn on themselves. In fact, approximately 75% of autoimmune disease sufferers are women.

In type 1 diabetes, the immune system attacks and destroys the pancreas, leaving the body without ample insulin to control the level of blood sugar. Uncontrolled diabetes wreaks havoc on blood vessels and organs leaving sufferers at increased risk for heart disease, amputations, and blindness. Type 1 diabetes usually sets in during puberty and affects more than 500,000 Americans.

New Treatment Reverses Type 1 Diabetes
Dr. Faustman and colleagues used a two-pronged approach to halt the body's attack on itself. First they used a naturally occurring chemical, TNF-alpha, to kill misdirected immune cells programmed to attack the pancreas. Then, they trained immature immune cells to correctly distinguish between self and non-self, thus preventing future attacks.

Approximately 75% of diabetic mice that received this treatment were effectively cured of diabetes long after the therapy was discontinued. After more than three months, the researchers examined the pancreases. They found "beautiful, functional" pancreatic cells in place of a defunct organ.

Dr. Faustman theorizes that killing off renegade immune cells and thus providing a nurturing environment for damaged organs to regrow may similarly eliminate many other autoimmune diseases. She emphasizes, however, that researchers are a long way from determining whether the laboratory findings can translate into new treatments for humans. The study was funded by a grant from the Iacocca Foundation.

The Society for Women's Health Research is the only not-for-profit organization whose sole mission is to improve the health of women through research. Founded in 1990, the Society brought to national attention the need for the appropriate inclusion of women in major medical research studies and the resulting need for more information about conditions affecting women. The Society advocates increased funding for research on women's health, encourages the study of sex differences that may affect the prevention, diagnosis and treatment of disease, and promotes the inclusion of women in medical research studies. Dr. Donnica Moore has been a member of the Society since 1990 and is a past member of its Board of Directors.

For more information on clinical research, click here.

Created: 5/13/2002  -  Sophia Cariati

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