Claudia Weidensteiner1, Wilfried Reichardt2, Oliver Siedentopf3, Ralph Graeser3, Holger Weber3
1MR Development & Application Center, University Medical Center Freiburg, Freiburg, Germany; 2Department of Radiology/Medical Physics, University Medical Center Freiburg, Freiburg, Germany; 3ProQinase GmbH, Freiburg, Germany
Vascular function under treatment was studied with dynamic contrast enhanced MRI (DCE-MRI) in a new in vivo angiogenesis model. Luciferase-transduced human endothelial cells embedded in a Matrigel matrix formed a functional neovasculature when implanted into mice. DCE-MRI showed differences in perfusion after treatment with different compounds and antibodies. This was compared to bioluminescence imaging and classical immunohistochemistry. Anti-angiogenic treatment decreased the fitted transfer constants and areas under the enhancement curves in the Matrigel plugs as compared to controls which indicated a decreased perfusion while angiogenesis-stimulating treatment showed the opposite effect.