Human resistance arteries are our most frequently used blood vessel to predict the effects of test drugs on peripheral vascular resistance and hence systemic blood pressure. Resistance arteries are the primary way by which organ-specific blood flow is regulated and, due to the high number of small resistance arteries and their ability to markedly dilate and constrict, they are key to the overall vascular control of systemic blood pressure. Our expert scientists can isolate resistance arteries from human or animal subcutaneous tissues to assess drug-mediated vasoconstriction and vasodilatation.
Assess whether your test articles cause vasoconstriction/dilatation to measure the effect on blood pressure
Compare with reference vasodilators and vasoconstrictors
Option for studies to be conducted in accordance with GLP regulations
Customized protocols are also available
Image: One of our scientists dissecting subcutaneous resistance arteries.
Vasoconstriction in subcutaneous resistance arteries
These assays determine whether your test articles cause vasoconstriction in human subcutaneous resistance arteries using phenylephrine, 5-HT or U46619 (thromboxane A2 mimetic) as reference compounds.
This assay uses subcutaneous resistance arteries to assess the effect of your test article on vasoconstriction via prostanoid (thromboxane) receptors.
Vasodilation in subcutaneous resistance arteries
These assays determine whether your test articles cause vasodilatation (vasodilation) in human subcutaneous resistance arteries. Several reference compounds are available, including acetylcholine, desmopressin, bradykinin, milrinone, or sodium nitroprusside.
This assay uses subcutaneous resistance arteries to assess the ability of your test article to induce vasodilation via endothelium-dependent mechanisms and provides a comparison with known vasodilators such as acetylcholine.
This assay assesses the effect of your test article to induce vasodilation via endothelium-independent mechanisms and provides a comparison with the effects of a direct nitric oxide (NO) donor such as SNP.
This assay uses subcutaneous resistance arteries to assess the ability of your test article to induce vasodilation via endothelium-dependent mechanisms and provides a comparison with known vasodilators such as acetylcholine.
This assay uses subcutaneous resistance arteries to assess the effect of your test article on vasodilation via vasopressin & oxytocin receptors.
Diseased arteries
These assays use ischemic subcutaneous resistance or muscular arteries to determine the effects of your test article ex vivo. For ischemic arteries, bradykinin or sodium nitroprusside (SNP) can be used as reference compounds. PDA-angiotensin 1 can be used for atherosclerotic arteries.
