Abstract
Canine pancreata obtained at total pancreatectomy were cannulated via the ducts and perfused with collagenase to prepare a tissue suspension that was isografted into the spleen (preparation congruent to 2 h, mean graft vol = 10 +/- 1 ml containing 24% of the B-cell mass/pancreas). In 13 dogs the tissue was implanted by reflux into terminal splenic veins: two died postoperatively, and in two the intrasplenic vein wall was inadvertently punctured during cannulation. In the remaining nine, mean fasting blood glucose (BG) was less than or equal to 150 mg/dl initially; one was killed at 2 wk (distemper) and one at 6 wk (sepsis, diabetes), and one died at 9 wk (intestinal obstruction). Mean BG was 94 +/- 4 mg/dl at 1 mo and remained in this range until the dogs were killed at 5 mo (91 +/- 13 mg/dl). During glucose-tolerance testing 1 wk preimplantation and 1 mo and 2-3 mo postimplant, mean values were: K (decline in glucose concentration, %/min), 3.4 +/- 0.2, 1.4 +/- 0.1, and 1.5 +/- 0.1; peak insulin (microU/ml), 50 +/- 5, 12 +/- 1, and 11 +/- 2; fasting serum glucagon (pg/ml), 33 +/- 3, 59 +/- 12, and 53 +/- 9, with no change in the glucagon response. Histologically, the spleens contained prominent islets. In five other dogs, the t...Continue Reading
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