HHcy and HG induced ED, which was potentiated by the combination of HHcy and HG via μ-calpain/PKCβ2 activation-induced eNOS-pThr497/495 and eNOS inactivation.
Taken together, these results suggest that the combined effects of eNOS deficiency and hyperglycemia contribute to podocyte injury, highlighting the importance of communication between endothelial cells and podocytes in diabetes.
We conclude that hyperglycemia activates thromboxane A2 receptor to impair the integrity and function of blood-brain barrier via the ROCK-PTEN-Akt-eNOS pathway.
In contrast, when myc-tagged human eNOS carried a mutation at the Akt phosphorylation site (Ser1177), O-linked N-acetylglucosamine modification was unchanged by hyperglycemia and phospho-eNOS was undetectable.
We tested the hypothesis that women with gestational diabetes mellitus (GDM) and their fetuses would demonstrate alterations in markers of endothelial nitric oxide synthase (eNOS) uncoupling, oxidative stress, and endothelial dysfunction and these changes would correlate with the levels of hyperglycemia through a pilot observational case-control study of women with GDM and their fetuses.
Using ATAC-seq, we found that hyperglycemia decreased chromatin accessibility at the endothelial NO synthase (Nos3) locus, resulting in reduced NO synthesis.
Here, we analyzed the possible involvement of hyperglycemia (HG) induced arginase expression in eNOS protein regulation and activity and also the impact of arginase inhibition on eNOS activity.
These data indicate that <i>O</i>-GlcNAcylation contributes to metabolic syndrome-induced PVAT dysfunction and that <i>O</i>-GlcNAcylation of eNOS may be targeted in the development of novel therapies for vascular dysfunction in conditions associated with hyperglycemia.
In contrast, when myc-tagged human eNOS carried a mutation at the Akt phosphorylation site (Ser1177), O-linked N-acetylglucosamine modification was unchanged by hyperglycemia and phospho-eNOS was undetectable.