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Pathologic hyperpermeability exists in the spectrum of disease states, including neuro-ischemic, neuro-inflammatory and neuro-oncological. To-date the characterization of disease pathology with T 1 -weighted quantitative dynamic contrast-enhanced magnetic resonance imaging has relied on the study of modeled microvascular parameters such as diseased tissue transvascular flow rates of small molecule paramagnetic imaging agents with short plasma half-lives, based on which it is difficult to assess the specific nature of the disease state. Another type of T 1 -weighted quantitative dynamic contrast-enhanced magnetic resonance imaging involves the use of paramagnetic heavy metal-chelated dendrimer nanoparticles that possess longer plasma half-lives with pre-determined molar relaxivities to quantitatively image concentration of macromolecular contrast agent accumulation over time in hyperpermeable pathology such as solid tumor tissue with the important advantage of concomitantly treating the pathology, which, in recent years, has been shown to be possible with the use of optimally-sized theranostic dendrimer nanoparticles in the 7 to 10 nanometer size range that are functionalized biocompatibly with a small molecule therapeutic. In this focused review, this translational theranostic methodology for quantitative dynamic contrast-enhanced magnetic resonance imaging and the concomitant treatment of malignant solid tumors with optimally designed theranostic nanoparticles within the 7 to 10 nanometer size range is discussed in context of fine-tuning its suitability for the study and treatment of other disease states with pathologic hyperpermeability and without.

Translational theranostic methodology for diagnostic imaging and the concomitant treatment of malignant solid tumors