Document Detail


Influence of hyperglycemia on blood perfusion of autotransplanted pancreatic islets in diabetic rats.
MedLine Citation:
PMID:  2492005     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
One week after a partial pancreatectomy, which did not affect glucose homeostasis, adult rats were autotransplanted with 500 isolated pancreatic islets beneath the renal capsule. Some rats were rendered diabetic with streptozocin (STZ) before being implanted with the islets, and other rats received no STZ and thus remained normoglycemic. The number of implanted islets was insufficient to revert hyperglycemia, but the STZ-induced diabetic animals were treated with insulin according to one of the following protocols: 1) one daily subcutaneous insulin injection for 28 days after transplantation; 2) insulin injection on days 1-14; 3) insulin injection on days 15-28; or 4) no insulin. Four weeks after transplantation, the blood perfusion of the islet grafts was determined by a microsphere technique. Continuous hyperglycemia after implantation of the islets significantly decreased the volume of the graft and the blood flow per volume compared with normoglycemic animals also receiving islet transplants. Insulin treatment counteracted the decrease in both of these values. This result was achieved regardless of whether the insulin treatment was maintained throughout the 4-wk period or only during the first or second half. The mechanism behind the impaired blood perfusion of the grafts during continuous hyperglycemia is unknown, but it may reflect an effect on the revascularization of the graft or on the intrinsic regulation of the blood perfusion of the graft.
Authors:
L Jansson; S Sandler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Diabetes     Volume:  38 Suppl 1     ISSN:  0012-1797     ISO Abbreviation:  Diabetes     Publication Date:  1989 Jan 
Date Detail:
Created Date:  1989-02-14     Completed Date:  1989-02-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372763     Medline TA:  Diabetes     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  196-8     Citation Subset:  AIM; IM    
Affiliation:
Department of Medical Cell Biology, Uppsala University, Sweden.
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MeSH Terms
Descriptor/Qualifier:
Animals
Diabetes Mellitus, Experimental / blood,  surgery*
Hyperglycemia / blood*
Insulin / blood
Islets of Langerhans / blood supply*
Islets of Langerhans Transplantation
Male
Microspheres
Pancreatectomy
Perfusion
Rats
Rats, Inbred Strains
Chemical
Reg. No./Substance:
11061-68-0/Insulin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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