The anti-diabetic effects of GLP-1-gastrin dual agonist ZP3022 in ZDF rats.

Abstract

AIMS/HYPOTHESIS:

Combination treatment with exendin-4 and gastrin has proven beneficial in treatment of diabetes and preservation of beta cell mass in diabetic mice. Here, we examined the chronic effects of a GLP-1-gastrin dual agonist ZP3022 on glycemic control and beta cell dysfunction in overtly diabetic Zucker Diabetic Fatty (ZDF) rats.

METHODS:

ZDF rats aged 11 weeks were dosed s.c., b.i.d. for 8 weeks with vehicle, ZP3022, liraglutide, exendin-4, or gastrin-17 with or without exendin-4. Glycemic control was assessed by measurements of HbA1c and blood glucose levels, as well as glucose tolerance during an oral glucose tolerance test (OGTT). Beta cell dynamics were examined by morphometric analyses of beta and alpha cell fractions.

RESULTS:

ZP3022 improved glycemic control as measured by terminal HbA1c levels (6.2±0.12 (high dose) vs. 7.9±0.07% (vehicle), P<0.001), as did all treatments, except gastrin-17 monotherapy. In contrast, only ZP3022, exendin-4 and combination treatment with exendin-4 and gastrin-17 significantly improved glucose tolerance and increased insulin levels during an OGTT. Moreover, only ZP3022 significantly enhanced the beta cell fraction in ZDF rats, a difference of 41%, when compared to the vehicle group (0.31±0.03 vs. 0.22±0.02%, respectively, P<0.05).

CONCLUSION:

These data suggest that ZP3022 may have therapeutic potential in the prevention/delay of beta cell dysfunction in type 2 diabetes.

• Authors: Jolanta Skarbaliene, Thomas Secher, Jacob Jelsing, Ansarullah, Trine S R Neerup, Nils Billestrup, Keld Fosgerau
• Journal: Peptides (Peptides) Vol. 69 Pg. 47-55 (Jul 2015) ISSN: 1873-5169 [Electronic] United States
• PMID: 25849341 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2015 Elsevier Inc. All rights reserved.

Chemical References

• Blood Glucose
• Gastrins
• Glycated Hemoglobin A
• Insulin
• Peptides
• ZP3022
• Glucagon-Like Peptide 1

Topics

• Animals
• Blood Glucose
• Diabetes Mellitus, Experimental (drug therapy, genetics, pathology)
• Diabetes Mellitus, Type 2 (drug therapy, metabolism, pathology)
• Gastrins (agonists, metabolism)
• Glucagon-Like Peptide 1 (agonists, metabolism)
• Glycated Hemoglobin (metabolism)
• Humans
• Insulin (metabolism)
• Insulin-Secreting Cells (drug effects)
• Mice
• Peptides (administration & dosage)
• Rats
• Rats, Zucker