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Updated: Jul 9, 2026

A Simple Bioassay for the Evaluation of Vascular Endothelial Growth Factors
Published on: March 15, 2016
Mechanisms of adverse effects of anti-VEGF therapy for cancer
1Department of Urology, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Abstract:
Advances in understanding the role of vascular endothelial growth factor (VEGF) in normal physiology are giving insight into the basis of adverse effects attributed to the use of VEGF inhibitors in clinical oncology. These effects are typically downstream consequences of suppression of cellular signalling pathways important in the regulation and maintenance of the microvasculature. Downregulation of these pathways in normal organs can lead to vascular disturbances and even regression of blood vessels, which could be intensified by concurrent pathological conditions. These changes are generally manageable and pose less risk than the tumours being treated, but they highlight the properties shared by tumour vessels and the vasculature of normal organs.
Insights
Vascular endothelial growth factor (VEGF) inhibitors used in cancer therapy can cause adverse effects by disrupting normal blood vessel maintenance. Understanding VEGF
Area of Science:
- Oncology
- Vascular Biology
- Pharmacology
Background:
- Vascular endothelial growth factor (VEGF) plays a crucial role in normal physiological processes.
- VEGF inhibitors are utilized in clinical oncology, but their use is associated with adverse effects.
- These adverse effects stem from the disruption of cellular signaling pathways regulating the microvasculature.
Purpose of the Study:
- To elucidate the basis of adverse effects associated with VEGF inhibitors in cancer therapy.
- To understand the role of VEGF in normal physiology and its relation to microvascular regulation.
- To compare the characteristics of tumor vasculature and normal organ vasculature.
Main Methods:
- Analysis of cellular signaling pathways affected by VEGF inhibition.
- Investigation of microvascular regulation and maintenance mechanisms.
- Comparison of vascular changes in normal organs versus tumor tissues.
Main Results:
- Suppression of VEGF-dependent signaling pathways leads to vascular disturbances in normal organs.
- These disturbances include vascular regression and can be exacerbated by pathological conditions.
- Tumor vessels share properties with the vasculature of normal organs.
Conclusions:
- Understanding normal VEGF physiology provides insight into the adverse effects of VEGF inhibitors.
- VEGF inhibition impacts both normal vasculature and tumor vasculature.
- The shared properties highlight potential challenges and considerations in VEGF-targeted therapies.
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