TY - JOUR
T1 - Repetitive glucose spikes accelerate atherosclerotic lesion formation in C57BL/6 mice
AU - Shuto, Yuki
AU - Asai, Akira
AU - Nagao, Mototsugu
AU - Sugihara, Hitoshi
AU - Oikawa, Shinichi
N1 - Publisher Copyright:
© 2015 Shuto et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2015/8/27
Y1 - 2015/8/27
N2 - Background: A number of epidemiological studies demonstrated that postprandial hyperglycemia is a risk factor for cardiovascular disease in individuals with impaired glucose tolerance. Although several laboratory studies have addressed the plausible causal role of postprandial acute hyperglycemia (glucose spikes) in the development of atherosclerosis, there is little convincing evidence in vivo whether the atherosclerotic lesion formation can be accelerated solely by glucose spikes. Here, we assessed the effect of repetitive glucose spikes on atherosclerotic lesion formation in mice. Methods: Female C57BL/6 mice were fed an atherogenic diet from 8 to 28 weeks of age. During the atherogenic diet feeding period, the mice orally received a glucose solution (50 mg glucose/mouse; G group) or water (Wgroup) twice daily, 6 days a week. Atherosclerotic lesion formation in the aortic sinus was quantitatively analyzed in serial cross-sections by oil red O staining. Results: G group mice showed transient increases in blood glucose level (∼5 mmol/L aboveW group), and the levels returned to levels similar to those in Wgroup mice within 60 min. No significant differences in glucose tolerance, insulin sensitivity, and plasma lipid profiles were observed after the 20-week repetitive administration between the 2 groups. G group mice showed an approximately 4-fold greater atherosclerotic lesion size in the aortic sinus than W group mice. Gene expression levels of Cd68 and Icam1 in the thoracic aorta were higher in G group mice than in Wgroup mice. Conclusions: These results indicate that glucose spikes can accelerate atherosclerotic lesion formation, with little influence on other metabolic disorders. Repetitive glucose administration in wildtype mice may serve as a simple and useful approach to better understanding the causal role of glycemic spikes in the development of atherosclerosis.
AB - Background: A number of epidemiological studies demonstrated that postprandial hyperglycemia is a risk factor for cardiovascular disease in individuals with impaired glucose tolerance. Although several laboratory studies have addressed the plausible causal role of postprandial acute hyperglycemia (glucose spikes) in the development of atherosclerosis, there is little convincing evidence in vivo whether the atherosclerotic lesion formation can be accelerated solely by glucose spikes. Here, we assessed the effect of repetitive glucose spikes on atherosclerotic lesion formation in mice. Methods: Female C57BL/6 mice were fed an atherogenic diet from 8 to 28 weeks of age. During the atherogenic diet feeding period, the mice orally received a glucose solution (50 mg glucose/mouse; G group) or water (Wgroup) twice daily, 6 days a week. Atherosclerotic lesion formation in the aortic sinus was quantitatively analyzed in serial cross-sections by oil red O staining. Results: G group mice showed transient increases in blood glucose level (∼5 mmol/L aboveW group), and the levels returned to levels similar to those in Wgroup mice within 60 min. No significant differences in glucose tolerance, insulin sensitivity, and plasma lipid profiles were observed after the 20-week repetitive administration between the 2 groups. G group mice showed an approximately 4-fold greater atherosclerotic lesion size in the aortic sinus than W group mice. Gene expression levels of Cd68 and Icam1 in the thoracic aorta were higher in G group mice than in Wgroup mice. Conclusions: These results indicate that glucose spikes can accelerate atherosclerotic lesion formation, with little influence on other metabolic disorders. Repetitive glucose administration in wildtype mice may serve as a simple and useful approach to better understanding the causal role of glycemic spikes in the development of atherosclerosis.
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U2 - 10.1371/journal.pone.0136840
DO - 10.1371/journal.pone.0136840
M3 - Article
C2 - 26313920
AN - SCOPUS:84943153649
VL - 10
JO - PLoS One
JF - PLoS One
SN - 1932-6203
IS - 8
M1 - e0136840
ER -