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Sustained glucagon-like peptide 1 expression from encapsulated transduced cells to treat obese diabetic rats

Paper ID Volume ID Publish Year Pages File Format Full-Text
20883 43196 2011 5 PDF Available
Title
Sustained glucagon-like peptide 1 expression from encapsulated transduced cells to treat obese diabetic rats
Abstract

Obesity and type 2 diabetes (T2D) are two prevalent chronic diseases that have become a major public health concern in industrialized countries. T2D is characterized by hyperglycemia and islet beta cell dysfunction. Glucagon-like peptide 1 (GLP-1) promotes β cell proliferation and neogenesis and has a potent insulinotropic effect. Leptin receptor deficient male rats are obese and diabetic and provide a model of T2D. We hypothesized that their treatment by sustained expression of GLP-1 using encapsulated cells may prevent or delay diabetes onset. Vascular smooth muscle cells (VSMC) retrovirally transduced to secrete GLP-1 were seeded into TheraCyteTM encapsulation devices, implanted subcutaneously and rats were monitored for diabetes. Rats that received cell implants showed mean plasma GLP-1 level of 119.3 ± 10.2 pM that was significantly elevated over control values of 32.4 ± 2.9 pM (P < 0.001). GLP-1 treated rats had mean insulin levels of 45.9 ± 2.3 ng/ml that were significantly increased over control levels of 7.3 ± 1.5 ng/ml (P < 0.001). In rats treated before diabetes onset elevations in blood glucose were delayed and rats treated after onset became normoglycemic and showed improved glucose tolerance tests. Untreated diabetic rats possess abnormal islet structures characterized by enlarged islets with α-cell infiltration and multifocal vacuolization. GLP-1 treatment induced normalization of islet structures including a mantle of α-cells and increased islet mass. These data suggest that encapsulated transduced cells may offer a potential long term treatment of patients.

Keywords
Diabetes; Bioisolator; GLP-1; Encapsulated cells; β cells
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Sustained glucagon-like peptide 1 expression from encapsulated transduced cells to treat obese diabetic rats
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 111, Issue 4, April 2011, Pages 383–387
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us