Non-invasive imaging for studying anti-angiogenic therapy effects

Area of Science:

• Oncology
• Medical Imaging
• Translational Research

Background:

• Noninvasive imaging is crucial for preclinical and clinical cancer research.
• It holds significant potential for improving the clinical translation of novel cancer drugs.
• Understanding and monitoring tumor angiogenesis is key to effective cancer therapy.

Purpose of the Study:

• To summarize and discuss imaging tools and methods for visualizing tumor angiogenesis.
• To evaluate techniques for monitoring the effects of anti-angiogenic therapy.
• To highlight the role of imaging in assessing treatment response and guiding drug development.

Main Methods:

• Micro-computed tomography (µCT) for visualizing and quantifying tumor microvasculature.
• Contrast-enhanced ultrasound (US) and magnetic resonance imaging (MRI) for assessing functional vascular parameters like perfusion.
• Molecular imaging techniques including US with targeted microbubbles, photoacoustic imaging (PAI), optical imaging (OI), MRI, positron emission tomography (PET), and single photon emission computed tomography (SPECT).

Main Results:

• Functional vascular parameters assessed by US and MRI can indicate early responses to anti-angiogenic therapy before changes in tumor size.
• Molecular imaging of tumor blood vessels, such as receptor expression, offers high diagnostic potential for characterization and therapy monitoring.
• Multimodal imaging approaches enable comprehensive longitudinal assessment of tumor vascular morphology, function, and molecular regulation.

Conclusions:

• Noninvasive imaging modalities are essential for characterizing tumor angiogenesis and monitoring anti-angiogenic therapies.
• A multimodal imaging strategy, combining different techniques, provides a comprehensive understanding of tumor vascular dynamics.
• These advanced imaging approaches are vital for accelerating the translation of new cancer drugs into clinical practice.