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| Ref Type | Journal Article | ||||||||||||
| PMID | (19723655) | ||||||||||||
| Authors | Antonescu CR, Yoshida A, Guo T, Chang NE, Zhang L, Agaram NP, Qin LX, Brennan MF, Singer S, Maki RG | ||||||||||||
| Title | KDR activating mutations in human angiosarcomas are sensitive to specific kinase inhibitors. | ||||||||||||
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| Abstract Text | Angiosarcomas (AS) represent a heterogeneous group of malignant vascular tumors occurring not only in different anatomic locations but also in distinct clinical settings, such as radiation or associated chronic lymphedema. Although representing only 1% to 2% of soft tissue sarcomas, vascular sarcomas provide unique insight into the general process of tumor angiogenesis. However, no molecular candidates have been identified to guide a specific therapeutic intervention. By expression profiling, AS show distinct up-regulation of vascular-specific receptor tyrosine kinases, including TIE1, KDR, SNRK, TEK, and FLT1. Full sequencing of these five candidate genes identified 10% of patients harboring KDR mutations. A KDR-positive genotype was associated with strong KDR protein expression and was restricted to the breast anatomic site with or without prior exposure to radiation. Transient transfection of KDR mutants into COS-7 cells showed ligand-independent activation of the kinase, which was inhibited by specific KDR inhibitors. These data provide a basis for the activity of vascular endothelial growth factor receptor-directed therapy in the treatment of primary and radiation-induced AS. | ||||||||||||
| Gene Name | Source | Synonyms | Protein Domains | Gene Description | Gene Role |
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| Therapy Name | Drugs | Efficacy Evidence | Clinical Trials |
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| Drug Name | Trade Name | Synonyms | Drug Classes | Drug Description |
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| Gene | Variant | Impact | Protein Effect | Variant Description | Associated with drug Resistance |
|---|---|---|---|---|---|
| KDR | A1065T | missense | gain of function - predicted | KDR (VEGFR2) A1065T lies within the protein kinase domain of the Kdr (Vegfr2) protein (UniProt.org). A1065T results in constitutive tyrosine autophosphorylation (PMID: 19723655), and therefore, is predicted to lead to a gain of Kdr (Vegfr2) protein function. | |
| KDR | D717V | missense | gain of function | KDR (VEGFR2) D717V lies within Ig-like C2-type domain 7 of the Kdr (Vegfr2) protein (PMID: 19723655). D717V confers a gain of function to the Kdr (Vegfr2) protein as demonstrated by ligand-independent tyrosine autophosphorylation in cultured cells (PMID: 19723655), and tumor formation in mouse models (PMID: 29588308). | |
| KDR | T771R | missense | unknown | KDR (VEGFR2) T771R lies within the transmembrane domain of the Kdr (Vegfr2) protein (UniProt.org). T771R has been identified in the scientific literature (PMID: 26422291, PMID: 19723655, PMID: 32123305), but has not been biochemically characterized and therefore, its effect on Kdr (Vegfr2) protein function is unknown (PubMed, Apr 2026). |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| KDR D717V | Advanced Solid Tumor | sensitive | Sunitinib | Preclinical - Cell culture | Actionable | In a preclinical study, cells expressing KDR D717V were sensitive to Sutent (sunitinib) in culture (PMID: 19723655). | 19723655 |
| KDR act mut | Advanced Solid Tumor | sensitive | Sorafenib | Preclinical | Actionable | In a preclinical study, Nexavar (sorafenib) demonstrated efficacy in cells expressing KDR activating mutations (PMID: 19723655). | 19723655 |
| KDR act mut | Advanced Solid Tumor | sensitive | Sunitinib | Preclinical | Actionable | In a preclinical study, cells expressing KDR activating mutations were sensitive to Sutent (sunitinib) in cell culture (PMID: 19723655). | 19723655 |
| KDR A1065T | Advanced Solid Tumor | sensitive | Sunitinib | Preclinical | Actionable | In a preclinical study, cells expressing KDR A1065T were sensitive to Sutent (sunitinib) in culture (PMID: 19723655). | 19723655 |