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Diabetologia

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01-12-2005 | Original Paper

Temporary hyperglycaemia provokes monocyte adhesion to endothelial cells in rat thoracic aorta

Authors: A. Otsuka, K. Azuma, T. Iesaki, F. Sato, T. Hirose, T. Shimizu, Y. Tanaka, H. Daida, R. Kawamori, H. Watada

Published in: Diabetologia | Issue 12/2005

Abstract

Aims/hypothesis

Several epidemiological data suggest that patients with postprandial hyperglycaemia are at high risk of cardiovascular disease. The aim of this study was to elucidate the effect of a glucose ‘spike’ on monocyte adhesion to rat aortic endothelial cells.

Materials and methods

Monocyte adhesion to endothelial cells in vivo was quantitated using an en face method for observation of endothelial surface after immunohistochemical staining for CD68 in the thoracic aortas of Sprague–Dawley rats after several kinds of blood glucose rises.

Results

The number of monocytes adhering to endothelial cells increased at 30 min after injection of glucose in 8-week-old Sprague–Dawley rats. The increased adhesion returned to the basal level at 120 min after glucose injection, concomitantly with the return of blood glucose levels to normal. The infusion of octreotide to inhibit endogenous insulin secretion did not prevent the glucose-induced increase in monocyte adhesion to endothelial cells. On the other hand, the number of monocytes adhering to endothelial cells did not increase in rats with streptozotocin-induced diabetes and sustained hyperglycaemia.

Conclusions/interpretation

Our data demonstrate that a temporary rise in blood glucose levels can in itself promote a reversible increase in monocyte adhesion to arterial endothelial cells.

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Title: Temporary hyperglycaemia provokes monocyte adhesion to endothelial cells in rat thoracic aorta
Authors: A. Otsuka
K. Azuma
T. Iesaki
F. Sato
T. Hirose
T. Shimizu
Y. Tanaka
H. Daida
R. Kawamori
H. Watada
Publication date: 01-12-2005
Publisher: Springer-Verlag
Published in: Diabetologia / Issue 12/2005
Print ISSN: 0012-186X
Electronic ISSN: 1432-0428
DOI: https://doi.org/10.1007/s00125-005-0005-6

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Temporary hyperglycaemia provokes monocyte adhesion to endothelial cells in rat thoracic aorta

Abstract

Aims/hypothesis

Materials and methods

Results

Conclusions/interpretation

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