Figure 13.

Effect of intetumumab and bevacizumab on brain tumor vasculature. Rats with intracerebral LX-1 SCLC xenografts were randomized to no treatment, intetumumab anti-αv integrin mAb, or bevacizumab anti-VEGF mAb. Rats underwent serial dynamic contrast-enhanced MRI with gadolinium-based contrast agent to evaluate vascular permeability (A) and dynamic susceptibility-weighted contrast-enhanced MRI with ferumoxytol to evaluate relative cerebral blood volume (rCBV) (B). Bevacizumab decreased vascular permeability and rCBV within 24 h, while intetumumab increased both permeability and rCBV over a week following treatment. Reprinted from Muldoon, Gahramanov, et al. (2011) by the permission of Society for Neuro-Oncology.