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Tumor Arterial Microvasculature
- Molecular classification
- Microvasculature, Arterioles, Tumor Vasculature
01
Overview
The tumor arterial microvasculature refers to the network of small arteries (arterioles) and their branches within tumors. Unlike normal tissue vasculature, which is highly organized, the microvasculature in tumors is profoundly abnormal in both structure and function. It exhibits disorganization, heterogeneity, immaturity, and hyperpermeability, leading to abnormal blood flow, impaired oxygen delivery, and increased interstitial pressure. These unique structural/functional abnormalities make tumor arterial microvasculature a key target for anti-cancer therapies.
02
Mechanism of action
Various, depending on the therapeutic agent. Anti-angiogenic agents inhibit new blood vessel formation or normalize existing tumor vasculature. Vascular disrupting agents selectively destroy tumor blood vessels.
03
Biological functions
AngiogenesisBlood supply to tumorsNutrient deliveryOxygen deliveryDrug deliveryWaste removal
04
Disease associations
CancerTumor growthMetastasisHypoxia
05
Safety considerations
Drug resistance due to heterogeneous vasculatureRebound angiogenesis after anti-angiogenic therapyNormalization of tumor vasculature can improve drug delivery but also potentially increase metastasisOff-target effects of anti-angiogenic agents
06
Interacting drugs
Anti-angiogenic agents (e.g., VEGF inhibitors)
2 more in the full profile.
07
Biomarkers
Vessel densityPerfusion markersHypoxia markers (e.g., HIF-1alpha)VEGF levelsAngiogenic factors levels
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