Tumor vasculature and tissue architecture

Tumor vasculature and tissue architecture refers to the structural and functional components of the tumor microenvironment that support malignancy. The tumor vasculature is typically characterized by disorganized, leaky, and tortuous blood vessels resulting from an imbalance of pro-angiogenic factors like Vascular Endothelial Growth Factor (VEGF) [Jain, R. K., Science, 2005]. These structural abnormalities create high interstitial fluid pressure and hypoxic regions, which hinder drug delivery and promote tumor aggressiveness [Hanahan, D., & Weinberg, R. A., Cell, 2011]. Tissue architecture encompasses the extracellular matrix and stromal cells, which provide physical support and biochemical cues for tumor growth and invasion [NCI Dictionary of Cancer Terms]. Therapeutic strategies targeting these components include anti-angiogenic agents that inhibit new vessel formation and vascular disrupting agents that collapse existing tumor vessels [PubMed, PMC3533133]. Additionally, efforts to normalize the tumor vasculature aim to improve the delivery of oxygen and therapeutic agents to the tumor core. Despite their clinical utility, these approaches are often associated with significant safety concerns, including hypertension, hemorrhage, and impaired wound healing [StatPearls, NBK470588]. Understanding the interplay between the vasculature and the surrounding architecture is crucial for developing more effective combination therapies in oncology.

Other names

Tumor microenvironmentTMETumor stromaNeovasculatureTumor extracellular matrix

Inhibition of pro-angiogenic signaling pathways (e.g., VEGF/VEGFR), disruption of established tumor blood vessels, and modification of the extracellular matrix to reduce interstitial fluid pressure.