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Updated: Dec 10, 2025

A Simple Bioassay for the Evaluation of Vascular Endothelial Growth Factors
Published on: March 15, 2016
Structure-activity relationship studies of indolin-2-one derivatives as vascular endothelial growth factor receptor
Mozhdeh Yousefian1,2, Razieh Ghodsi1,2
1Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran.
Abstract:
Angiogenesis is a requirement for the growth of cancer cells. The family of vascular endothelial growth factor receptors (VEGFRs) is the main target in metastasis. Indolin-2-one is proved to be an essential scaffold of antiangiogenic drugs. Sunitinib is the first oral indolin-2-one derivative marketed as a VEGFR inhibitor in the treatment of renal cell carcinoma and gastrointestinal stromal tumors. Therefore, novel compounds possessing the scaffold of sunitinib were designed and synthesized by different researchers to improve the anticancer activity, bioavailability, and solubility, and to decrease the toxicity of sunitinib. In this comprehensive review, the structure-activity relationship of different indolin-2-one analogs as VEGFR inhibitors is discussed. It has been observed that the indolin-2-one core is necessary for the inhibition of VEGFRs. It was determined that substitutions at C-3 of the oxindole ring play an important role in their antiangiogenic and anticancer activities.
Insights
Novel indolin-2-one compounds targeting vascular endothelial growth factor receptors (VEGFRs) show promise for cancer treatment. Modifications to the indolin-2-one scaffold, particularly at the C-3 position, are key to enhancing antiangiogenic and anticancer effects.
Area of Science:
- Medicinal Chemistry
- Pharmacology
- Oncology
Background:
- Angiogenesis is crucial for cancer cell proliferation and metastasis.
- Vascular Endothelial Growth Factor Receptors (VEGFRs) are key targets for anti-cancer therapies.
- Indolin-2-one derivatives, like Sunitinib, are established VEGFR inhibitors used in cancer treatment.
Purpose of the Study:
- To review the structure-activity relationships of indolin-2-one analogs as VEGFR inhibitors.
- To explore novel indolin-2-one compounds designed to improve upon Sunitinib's efficacy and safety.
- To understand how modifications to the indolin-2-one scaffold impact antiangiogenic and anticancer activities.
Main Methods:
- Comprehensive literature review of indolin-2-one derivatives as VEGFR inhibitors.
- Analysis of structure-activity relationships (SAR) based on published studies.
- Discussion of synthetic strategies and biological evaluation of novel analogs.
Main Results:
- The indolin-2-one core is essential for VEGFR inhibition.
- Substitutions at the C-3 position of the oxindole ring significantly influence antiangiogenic and anticancer potency.
- Various analogs demonstrate improved anticancer activity, bioavailability, and solubility compared to Sunitinib.
Conclusions:
- Indolin-2-one derivatives represent a promising class of antiangiogenic agents for cancer therapy.
- Strategic modifications of the indolin-2-one scaffold, especially at C-3, can optimize anti-cancer drug profiles.
- Further research into these analogs holds potential for developing more effective and safer cancer treatments.
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