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Assessment of the morphological and functional effects of the anti-angiogenic agent SU11657 on 9L gliosarcoma vasculature using dynamic susceptibility contrast MRI. Magn Reson Med 2007 Apr;57(4):680-7 PMID: 17390352

Abstract

To investigate the influence of anti-angiogenic agents on tumor perfusion, we employed a dynamic susceptibility contrast (DSC)-MRI method that utilizes a simultaneous gradient-echo (GE) and spin-echo (SE) imaging sequence to derive perfusion parameters (blood flow, blood volume, and mean transit time (MTT)). These parameters are sensitive to both the total vasculature (from the GE data) and the microvasculature (from the SE data), and can also provide a measure of the mean vessel diameter (mVD). This approach was used to evaluate the response of a 9L rat brain tumor model to 20 mg/kg and 40 mg/kg of the anti-angiogenic agent SU11657. The 20-mg/kg dose significantly decreased mVD by 29.9% (P = 0.02). The 40-mg/kg dose significantly decreased mVD by 30.4% (P = 0.0007), SE blood volume by 31.8% (P = 0.03), GE and SE MTT by 46.9% (P = 0.03) and 62.0% (P = 0.0005), and increased GE and SE blood flow by 36.6% (P = 0.04) and 52.6% (P = 0.02). These findings demonstrate that DSC-MRI perfusion methods can play a key role in the noninvasive evaluation of morphological and functional changes in tumor vasculature in response to therapy.

Author List

Quarles CC, Schmainda KM

Author

Kathleen M. Schmainda PhD Professor in the Radiology department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Animals
Blood Volume Determination
Brain Neoplasms
Cerebrovascular Circulation
Contrast Media
Gadolinium DTPA
Gliosarcoma
Image Processing, Computer-Assisted
Magnetic Resonance Imaging
Male
Microcirculation
Neovascularization, Pathologic
Organic Chemicals
Rats
Rats, Inbred F344
Receptor Protein-Tyrosine Kinases
Regional Blood Flow



View this publication's entry at the Pubmed website PMID: 17390352
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