Normoglycemia after reflux of islet-containing pancreatic fragments into the splenic vascular bed in dogs.

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 tissue was injected into the splenic pulp: mean BG rose to greater than or equal to 250 mg/dl at 2 wk (compared with initial series, P less than 0.001) and remained elevated until death at 6 wk, when histologic examination of the spleens showed severe fibrosis and no islets. Apancreatic controls (N = 4) survived 10 +/- 3 days; BG was 343 +/- 11 mg/dl terminally. We conclude that this modified method for collagenase perfusion of a single large-mammal pancreas via the ducts provides sufficient viable islets to induce prolonged normoglycemia (5 mo) and preserve the response to glucose challenge. Reflux of pancreatic fragments into splenic veins appears more efficient than intrapulp implantation.

journal_name

Diabetes

journal_title

Diabetes

authors

Warnock GL,Rajotte RV,Procyshyn AW

doi

10.2337/diab.32.5.452

subject

Has Abstract

pub_date

1983-05-01 00:00:00

pages

452-9

issue

5

eissn

0012-1797

issn

1939-327X

journal_volume

32

pub_type

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