Endothelial Insulin Receptor Restoration Rescues Vascular Function in Male Insulin Receptor Haploinsufficient Mice.
Endocrinology
; 159(8): 2917-2925, 2018 08 01.
Article
in En
| MEDLINE
| ID: mdl-29796592
ABSTRACT
Reduced systemic insulin signaling promotes endothelial dysfunction and diminished endogenous vascular repair. We investigated whether restoration of endothelial insulin receptor expression could rescue this phenotype. Insulin receptor knockout (IRKO) mice were crossed with mice expressing a human insulin receptor endothelial cell-specific overexpression (hIRECO) to produce IRKO-hIRECO progeny. No metabolic differences were noted between IRKO and IRKO-hIRECO mice in glucose and insulin tolerance tests. In contrast with control IRKO littermates, IRKO-hIRECO mice exhibited normal blood pressure and aortic vasodilatation in response to acetylcholine, comparable to parameters noted in wild type littermates. These phenotypic changes were associated with increased basal- and insulin-stimulated nitric oxide production. IRKO-hIRECO mice also demonstrated normalized endothelial repair after denuding arterial injury, which was associated with rescued endothelial cell migration in vitro but not with changes in circulating progenitor populations or culture-derived myeloid angiogenic cells. These data show that restoration of endothelial insulin receptor expression alone is sufficient to prevent the vascular dysfunction caused by systemically reduced insulin signaling.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Aorta
/
Vasodilation
/
Blood Glucose
/
Receptor, Insulin
/
Endothelium, Vascular
/
Haploinsufficiency
Limits:
Animals
/
Humans
/
Male
Language:
En
Journal:
Endocrinology
Year:
2018
Document type:
Article
Affiliation country:
Reino Unido