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Volume 343:230-238 July 27, 2000 Number 4 Next

	Full Text PDF Editorial by Robertson, R. P. Add to Personal Archive Add to Citation Manager Notify a Friend E-mail When Cited PubMed Citation

ABSTRACT

Background Registry data on patients with type 1 diabetes mellitus who undergo pancreatic islet transplantation indicate that only 8 percent are free of the need for insulin therapy at one year.

Methods Seven consecutive patients with type 1 diabetes and a history of severe hypoglycemia and metabolic instability underwent islet transplantation in conjunction with a glucocorticoid-free immunosuppressive regimen consisting of sirolimus, tacrolimus, and daclizumab. Islets were isolated by ductal perfusion with cold, purified collagenase, digested and purified in xenoprotein-free medium, and transplanted immediately by means of a percutaneous transhepatic portal embolization.

Results All seven patients quickly attained sustained insulin independence after transplantation of a mean (±SD) islet mass of 11,547±1604 islet equivalents per kilogram of body weight (median follow-up, 11.9 months; range, 4.4 to 14.9). All recipients required islets from two donor pancreases, and one required a third transplant from two donors to achieve sustained insulin independence. The mean glycosylated hemoglobin values were normal after transplantation in all recipients. The mean amplitude of glycemic excursions (a measure of fluctuations in blood glucose concentrations) was significantly decreased after the attainment of insulin independence (from 198±32 mg per deciliter [11.1±1.8 mmol per liter] before transplantation to 119±37 mg per deciliter [6.7±2.1 mmol per liter] after the first transplantation and 51±30 mg per deciliter [2.8±1.7 mmol per liter] after the attainment of insulin independence; P<0.001). There were no further episodes of hypoglycemic coma. Complications were minor, and there were no significant increases in lipid concentrations during follow-up.

Conclusions Our observations in patients with type 1 diabetes indicate that islet transplantation can result in insulin independence with excellent metabolic control when glucocorticoid-free immunosuppression is combined with the infusion of an adequate islet mass.

Source Information

From the Surgical–Medical Research Institute and the Department of Surgery (A.M.J.S., J.R.T.L., G.S.K., G.L.W., N.M.K., R.V.R.) and the Department of Medicine (E.A.R., E.T.), University of Alberta, Edmonton, Alta., Canada.

Address reprint requests to Dr. Shapiro at 2D4.37 Department of Surgery, University of Alberta Hospitals, Mackenzie Health Sciences Center, 8440 112 St., Edmonton, AB T6G 2B7, Canada, or at amjs{at}powersurfr.com.

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• Choi, Y. H., Lee, J. H., Yuk, S. H., Suh, S. H., Yoon, K.-H. (2006). Core/Shell Macrobeads for the Protection of Islets from Immune System Rejection. Journal of Bioactive and Compatible Polymers 21: 71-81 [Abstract]  
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