Differential expression of VEGFA, TIE2, and ANG2 but not ADAMTS1 in rat mesenteric microvascular arteries and veins.
Microvessels respond to metabolic stimuli (e.g. pO(2)) and hemodynamic forces (e.g. shear stress and wall stress) with structural adaptations including angiogenesis, remodeling and pruning. These responses could be mediated by differential gene expression in endothelial and smooth muscle cells. Therefore, rat mesenteric arteries and veins were excised by microsurgery, and mRNA expression of four angioadaptation-related genes was quantified by real time duplex RT-PCR in equal amounts of total RNA, correlated to two different house keeping genes (beta-actin, GAPDH). The results show higher expression of VEGFA, TIE2, and ANG2 in arteries than in veins, but equal expression of ADAMTS1. Higher availability of VEGFA mRNA in endothelial cells of arteries shown here could contribute to the maintenance of mechanically stressed blood vessels and counteract pressure-induced vasoconstriction.
Mecha Disassa
N
N
Charité Berlin, Campus Benjamin Franklin, Department of Physiology, Berlin, Germany.
Styp-Rekowska
B
B
Hinz
B
B
Da Silva-Azevedo
L
L
Pries
A R
AR
Zakrzewicz
A
A
D051722:ADAM Proteins / Q000235:genetics*; D000071097:ADAMTS1 Protein; D000222:Adaptation, Physiological / Q000502:physiology; D042702:Angiopoietin-2 / Q000235:genetics*; D000818:Animals; D004730:Endothelium, Vascular / Q000502:physiology; D015870:Gene Expression / Q000502:physiology; D008297:Male; D008638:Mesenteric Arteries / Q000502:physiology*; D008642:Mesenteric Veins / Q000502:physiology*; D008833:Microcirculation / Q000502:physiology; D009131:Muscle, Smooth, Vascular / Q000502:physiology; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D042787:Receptor, TIE-2 / Q000235:genetics*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D042461:Vascular Endothelial Growth Factor A / Q000235:genetics*; D014661:Vasoconstriction / Q000502:physiology
D042702:Angiopoietin-2; D012333:RNA, Messenger; D042461:Vascular Endothelial Growth Factor A; C467498:vascular endothelial growth factor A, rat; D042787:Receptor, TIE-2; D051722:ADAM Proteins; D000071097:ADAMTS1 Protein; C486324:Adamts1 protein, rat