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McGowan Institute faculty member Dr. Massimo Trucco Spotlight Series: Dr. Massimo Trucco Part 4 of 4 – Type 1 Diabetes Vaccine in Clinical Trial

McGowan Institute for Regenerative Medicine faculty member Massimo Trucco, M.D., Chief of the Division of Immunogenetics at Children’s Hospital of Pittsburgh of the University of Pittsburgh Medical Center, and scientists there are involved in a research study where microspheres carrying targeted nucleic acid molecules fabricated in the laboratory have been shown to prevent and even reverse new-onset cases of Type 1 diabetes in animal models.  This innovative scientific approach is currently in a Phase 1 clinical trial at the hospital.

In Type 1 diabetes, T cells from the immune system travel to the pancreas and destroy beta cells, which produce insulin. The scientists found that the microspheres reprogram dendritic cells to block the signaling mechanism that sends T cells to destroy beta cells.

Currently, Dr. Trucco and his colleagues are conducting a clinical trial of their leukapheresis-based dendritic cell approach in humans at Children’s. This Phase 1 clinical trial has been approved by the U.S. Food and Drug Administration (FDA).  If the leukapheresis-based approach continues to show exceptional safety, the researchers hope to launch a national clinical trial that will assess the effectiveness of the dendritic cells in pediatric patients to prevent diabetes or reverse the disease right after it is clinically confirmed. The study, “Autologous Dendritic Cell Therapy for Type 1 Diabetes Suppression:  A Safety Study,” is currently open for enrollment. 

Leukapheresis is a process that allows for the collection of dendritic cell precursors from the patients in the study, which takes two to four hours. After the precursors are collected, they are treated in the lab with specific growth factors that turn them into dendritic cells. The growth factors are also combined with short DNA sequences that specifically block the expression of molecules that are found at the surface of dendritic cells known as CD40, CD80, and CD86.  Once these reprogrammed dendritic cells are tested in the lab, they are injected back into the patient. They then orchestrate an anti-diabetic effect by suppressing the activity of T-cells which are responsible for the impairment and destruction of the pancreatic insulin-producing cells.

Type 1 diabetes is regarded as an autoimmune disease because a person’s immune system’s T cells attack and destroy the beta cells in the pancreas that produce insulin. Symptoms of Type 1 diabetes usually develop over a short period of time and include increased thirst, frequent urination, constant hunger, weight loss, blurred vision, and extreme fatigue. People with Type 1 diabetes require daily injections of insulin to survive. Type 1 diabetes also is known as insulin-dependent diabetes mellitus or juvenile-onset diabetes. The National Institutes of Health (NIH) reports that more than 1 million children and teenagers (age 19 and younger) have Type 1 diabetes. According to the NIH, 5 percent to 10 percent of diagnosed diabetes cases in the United States are Type 1 diabetes.

This feature concludes the 4-part series on Dr. Trucco and his pioneering research efforts toward a cure for Type 1 diabetes.  The McGowan Institute congratulates Dr. Trucco on all his scientific achievements and thanks are extended to him and his colleagues on behalf of all of the patients that these emerging technologies may one day help. 

Read more…

Part 1 of 4: A Leader in Immunogenetics

Part 2 of 4:  A Career Dedicated to Diabetes Research

Part 3 of 4:  Published Milestones in Diabetes Research

Children’s Hospital of Pittsburgh of UPMC News Release

The Pittsburgh Channel

About.com

Pittsburgh Post-Gazette

Pittsburgh Tribune-Review

Science Daily

Diabetes Health

Autologous Dendritic Cell Therapy for Type 1 Diabetes Suppression: A Safety Study

Children's Hospital of Pittsburgh of UPMC Studies Open for Enrollment

 

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