Time-dependent alterations in rat macrovessels with type 1 diabetes.
Vascular complications are associated with the progressive severity of diabetes, resulting in significant morbidity and mortality. This study quantifies functional vascular parameters and macrovascular structure in a rat model of type 1 diabetes. While there was no difference in the systemic arterial elastance (Ea) with 50 days of diabetes, changes were noted in the aorta and femoral artery including increased tunica media extracellular matrix content, decreased width of both the media and individual smooth muscle cell layers, and increased incidence of damaged mitochondria. Extracellular matrix proteins and elastin levels were significantly greater in the aorta of diabetic animals. These differences correlated with diminished matrix metalloprotease activity in the aorta of the diabetic animals. In conclusion, diabetes significantly altered the structure and ultrastructure of the aorta and femoral artery before systemic changes in arterial elastance could be detected.
Department of Physical Therapy and Rehabilitation Science, University of Kansas Medical Center, Kansas City, KS 66160, USA.
Yvonne
Y
Searls
Irina V
IV
Smirnova
Lisa
L
Vanhoose
Barbara
B
Fegley
Rajprasad
R
Loganathan
Lisa
L
Stehno-Bittel
D000818:Animals; D001011:Aorta / Q000201:enzymology / Q000473:pathology / Q000503:physiopathology; D003921:Diabetes Mellitus, Experimental / Q000150:complications / Q000473:pathology* / Q000503:physiopathology; D003922:Diabetes Mellitus, Type 1 / Q000150:complications / Q000473:pathology* / Q000503:physiopathology; D003925:Diabetic Angiopathies / Q000473:pathology* / Q000503:physiopathology; D004549:Elastin / Q000032:analysis; D005109:Extracellular Matrix / Q000473:pathology; D016326:Extracellular Matrix Proteins / Q000032:analysis; D005263:Femoral Artery / Q000473:pathology / Q000503:physiopathology; D008297:Male; D020782:Matrix Metalloproteinases / Q000032:analysis; D008931:Mitochondria, Muscle / Q000473:pathology; D009131:Muscle, Smooth, Vascular / Q000473:pathology / Q000503:physiopathology; D051381:Rats; D017207:Rats, Sprague-Dawley; D017540:Tunica Media / Q000473:pathology / Q000503:physiopathology; D014655:Vascular Resistance
D016326:Extracellular Matrix Proteins; D004549:Elastin; D020782:Matrix Metalloproteinases