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Original Article
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Volume 355:1318-1330 September 28, 2006 Number 13
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International Trial of the Edmonton Protocol for Islet Transplantation
A.M. James Shapiro, M.D., Ph.D., Camillo Ricordi, M.D., Bernhard J. Hering, M.D., Hugh Auchincloss, M.D., Robert Lindblad, M.D., R. Paul Robertson, M.D., Antonio Secchi, M.D., Mathias D. Brendel, M.D., Thierry Berney, M.D., Daniel C. Brennan, M.D., Enrico Cagliero, M.D., Rodolfo Alejandro, M.D., Edmond A. Ryan, M.D., Barbara DiMercurio, R.N., Philippe Morel, M.D., Kenneth S. Polonsky, M.D., Jo-Anna Reems, Ph.D., Reinhard G. Bretzel, M.D., Federico Bertuzzi, M.D., Tatiana Froud, M.D., Raja Kandaswamy, M.D., David E.R. Sutherland, M.D., Ph.D., George Eisenbarth, M.D., Ph.D., Miriam Segal, Ph.D., Jutta Preiksaitis, M.D., Gregory S. Korbutt, Ph.D., Franca B. Barton, M.S., Lisa Viviano, R.N., Vicki Seyfert-Margolis, Ph.D., Jeffrey Bluestone, Ph.D., and Jonathan R.T. Lakey, Ph.D.

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ABSTRACT

Background Islet transplantation offers the potential to improve glycemic control in a subgroup of patients with type 1 diabetes mellitus who are disabled by refractory hypoglycemia. We conducted an international, multicenter trial to explore the feasibility and reproducibility of islet transplantation with the use of a single common protocol (the Edmonton protocol).

Methods We enrolled 36 subjects with type 1 diabetes mellitus, who underwent islet transplantation at nine international sites. Islets were prepared from pancreases of deceased donors and were transplanted within 2 hours after purification, without culture. The primary end point was defined as insulin independence with adequate glycemic control 1 year after the final transplantation.

Results Of the 36 subjects, 16 (44%) met the primary end point, 10 (28%) had partial function, and 10 (28%) had complete graft loss 1 year after the final transplantation. A total of 21 subjects (58%) attained insulin independence with good glycemic control at any point throughout the trial. Of these subjects, 16 (76%) required insulin again at 2 years; 5 of the 16 subjects who reached the primary end point (31%) remained insulin-independent at 2 years.

Conclusions Islet transplantation with the use of the Edmonton protocol can successfully restore long-term endogenous insulin production and glycemic stability in subjects with type 1 diabetes mellitus and unstable control, but insulin independence is usually not sustainable. Persistent islet function even without insulin independence provides both protection from severe hypoglycemia and improved levels of glycated hemoglobin. (ClinicalTrials.gov number, NCT00014911 [ClinicalTrials.gov] .)


Source Information

From the University of Alberta, Edmonton, AB, Canada (A.M.J.S., E.A.R., J.P., G.S.K., J.R.T.L.); the University of Miami, Miami (C.R., R.A., T.F.); the University of Minnesota, Minneapolis (B.J.H., R.K., D.E.R.S., M.S.); Harvard Medical School, Boston (H.A., E.C.); the Emmes Corporation, Rockville, MD (R.L., F.B.B.); the University of Washington, Seattle (R.P.R., J.-A.R.); San Raffaele Scientific Institute, Milan (A.S., F.B.); Justus-Liebig University, Giessen, Germany (M.D.B., R.G.B.); the University of Geneva, Geneva (T.B., P.M.); Washington University, St. Louis (D.C.B., K.S.P.); the National Institute of Allergy and Infectious Diseases, Rockville, MD (B.D., L.V.); the Barbara Davis Center, University of Colorado, Boulder (G.E.); and the Immune Tolerance Network, San Francisco, and Bethesda, MD (H.A., V.S.-M., J.B.).

Address reprint requests to Dr. Shapiro at Clinical Islet Transplant Program, University of Alberta, 2000 College Plaza, 8215 112th St., Edmonton, AB T6G 2C8, Canada, or at shapiro{at}islet.ca.

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Related Letters:

Islet Transplantation
Meyer C., Vaksman A., Thompson D. M., Fung M. A., Warnock G. L., Shapiro A.M. J., Ricordi C., Hering B. J.
Extract | Full Text | PDF  
N Engl J Med 2007; 356:963-965, Mar 1, 2007. Correspondence

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