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Scientists at Massachusetts General Hospital (MGH) in Boston have initiated a phase 1 clinical trial to reverse type 1 diabetes. The trial is exploring whether the promising results from the laboratory of Denise Faustman, MD, PhD, can be applied in human diabetes.
Faustman’s studies have shown that mice with a form of diabetes that closely resembles type 1 diabetes in humans can be cured. In the animal studies, a commonly used vaccine that provides protection against tuberculosis, called Bacillus Calmette-Guerin (BCG), was used effectively to deplete the abnormal immune cells that attack and destroy the insulin-producing cells of the pancreas.
The first step in the human study, which is currently enrolling volunteers, is to determine whether the same strategy using BCG vaccination can be used to modify the abnormal autoimmune cells that are present in type 1 “juvenile-onset” diabetes, sometimes called “juvenile-onset” diabetes. “We are pleased to be starting human clinical trials,” says Faustman. “Human trials take time, but we are making the step from curing diabetes in mice to determining whether it will work in men and women with diabetes.”
If blood sugar levels are well controlled in type 1, the numerous long-term complications can largely be avoided. However, the so-called intensive therapy that is required to maintain near-normal sugar levels requires life-long demands on the patient, including frequent blood sugar monitoring and at least three daily injections of insulin or use of an insulin pump, along with restrictive diets. Insulin doses must be adjusted based on blood sugar levels, dietary factors and anticipated exercise. A cure for diabetes has been highly sought after and has attracted much research interest.
The clinical trial is using the BCG vaccine for several reasons. BCG has been used safely for nearly 80 years as a tuberculosis vaccine. It is now being used in the human trial because it causes a low-grade inflammatory reaction, which in the mouse model of autoimmune diabetes lead to the destruction of the abnormal autoimmune cells.
David M. Nathan, MD, director of the MGH Diabetes Center, who is leading the human study at MGH, provides context: “This is the very first step in what is likely to be a long process in achieving a cure. We first need to determine whether the abnormal autoimmune cells that underlie type 1 diabetes can be knocked out with BCG vaccination, as occurred in the mouse studies.”
The phase I trial is being supported largely through direct and fundraising support from the Iacocca Foundation, and through support from other donors and the Massachusetts General Hospital. The Iacocca Foundation was founded by Lee Iacocca and his family in 1984 to fund innovative approaches to a potential cure for diabetes. Trial information is available to the public at www.faustmanlab.org.
(Editor's Note: Diabetes Health has had a long relationship with Dr. Faustman, as well as the Iacocca Foudation, and has written extensively on both over the years. To read more about them, go to the following links: 3010, 3170, 3456, 4035, 4126, 4400, 4415, 4766 and 4834. To see a video interview of Dr. Faustman, click here.)
Diabetes Health is the essential resource for people living with diabetes- both newly diagnosed and experienced as well as the professionals who care for them. We provide balanced expert news and information on living healthfully with diabetes. Each issue includes cutting-edge editorial coverage of new products, research, treatment options, and meaningful lifestyle issues.