Diabetes, Vol 48, Issue 11 2107-2121, Copyright © 1999 by American Diabetes Association
Targeting autoimmune diabetes with gene therapy
N Giannoukakis, WA Rudert, PD Robbins and M Trucco
Department of Molecular Genetics and Biochemistry, University of Pittsburgh, School of Medicine, Pennsylvania, USA.
The autoimmune nature of insulin-dependent, or type 1, diabetes targets the
beta-cells of the pancreas for destruction and results in a lifelong
commitment to insulin replacement therapy. Although the number of
formulations and dosing of insulin have become more sophisticated and more
efficient in recent years, insulin therapy alone is unable to prevent
nephropathy, retinopathy, or vascular and heart disease, which still occur
in a large number of patients. Different approaches have been attempted to
eliminate the requirement of exogenous insulin administration.
Historically, these have included pancreatic and islet transplants, which
were later combined with treatments intended to halt the destructive
process directed against the islets. Despite significant advances made in
all of these areas, each approach faces a hostile immunological response
that frequently ends with the loss of the islets. Gene therapy-based
approaches add a new dimension to the efforts aimed at specifically
blocking the immunological attack against the islets in genetically at-risk
individuals (autoimmunity) or the immunological response against
transplanted allogeneic islets (rejection). This new technology may have an
important role in the therapy and cure of type 1 diabetes.