Monitoring Combretastatin A4-induced tumor hypoxia and hemodynamic changes using endogenous MR contrast and DCE-MRI

Colliez, Florence;Fruytier, Anne-Catherine;Magat, Julie;Neveu, Marie-Aline;Jordan, Bénédicte;et.al.
(2016) Magnetic Resonance in Medicine — Vol. 75, n° 2, p. 866-872 (2016)

Files

2015_Colliez_Magnetic_Resonance_in_Medicine.pdf
  • Open Access
  • Adobe PDF
  • 1.59 MB
Download

Details

Authors
Show more
Abstract
PURPOSE: To benchmark MOBILE (Mapping of Oxygen By Imaging Lipid relaxation Enhancement), a recent noninvasive MR method of mapping changes in tumor hypoxia, electron paramagnetic resonance (EPR) oximetry, and dynamic contrast-enhanced MRI (DCE-MRI) as biomarkers of changes in tumor hemodynamics induced by the antivascular agent combretastatin A4 (CA4). METHODS: NT2 and MDA-MB-231 mammary tumors were implanted subcutaneously in FVB/N and nude NMRI mice. Mice received 100 mg/kg of CA4 intraperitoneally 3 hr before imaging. The MOBILE sequence (assessing R1 of lipids) and the DCE sequence (assessing Ktrans hemodynamic parameter), were assessed on different cohorts. pO2 changes were confirmed on matching tumors using EPR oximetry consecutive to the MOBILE sequence. Changes in tumor vasculature were assessed using immunohistology consecutive to DCE-MRI studies. RESULTS: Administration of CA4 induced a significant decrease in lipids R1 (P = 0.0273) on pooled tumor models and a reduction in tumor pO2 measured by EPR oximetry. DCE-MRI also exhibited a significant drop of Ktrans (P < 0.01) that was confirmed by immunohistology. CONCLUSION: MOBILE was identified as a marker to follow a decrease in oxygenation induced by CA4. However, DCE-MRI showed a higher dynamic range to follow changes in tumor hemodynamics induced by CA4. Magn Reson Med, 2015. © 2015 Wiley Periodicals, Inc.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Colliez, F., Fruytier, A.-C., Magat, J., Neveu, M.-A., Cani, P., Gallez, B., & Jordan, B. (2016). Monitoring Combretastatin A4-induced tumor hypoxia and hemodynamic changes using endogenous MR contrast and DCE-MRI. Magnetic Resonance in Medicine, 75(2), 866-872. https://doi.org/10.1002/mrm.25642 (Original work published 2016)