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Updated: Apr 28, 2026

Preparation Of Neovascular Tissues from Human Glioma Tissues for Quantitative Proteomics Analysis of Tumor Angiogenesis
Published on: March 20, 2026
Thymic epithelial tumors express vascular endothelial growth factors and their receptors as potential targets of
Rossano Lattanzio1, Rossana La Sorda1, Francesco Facciolo2
1Center of Excellence for Research on Ageing, "University G. D'Annunzio" Foundation, Chieti, Italy.
Objectives:
Tumor angiogenesis is an essential and complex process necessary for the growth of all tumors which represents a potential therapeutic target. Angiogenesis inhibitors targeting vascular endothelial growth factor (VEGF) or their receptor tyrosine kinases have been approved by the FDA. In thymic epithelial tumors (TET), targeted therapies have been sporadically applied due to their rarity. To ascertain the presence of potential therapeutic targets, we analyzed by immunohistochemistry the expression of angiogenesis-related biomarkers in a large series of TET arranged in Tissue Micro Arrays (TMA).
Materials And Methods:
We assessed by immunohistochemistry the expression of the possible molecular target of anti-angiogenic therapy, i.e. VEGFA, VEGFC, VEGFD, VEGFR1, VEGFR2, VEGFR3, and PDGFRβ, in a TMA series of 200 TET collected in the framework of a multi-institutional collaborative project for Rare Diseases.
Results:
When compared to the low-risk tumors, high-risk TET (B2, B3, carcinomas) contained higher proportion of cancer cells expressing VEGFA, VEGFC and VEGFD (P<0.001, P<0.001, and P<0.001) growth factors, and their receptors VEGFR1 (P=0.002), VEGFR2 (P=0.013), and VEGFR3 (P=0.041). No differences were observed in terms of PDGFRβ expression.
Conclusions:
According to our data, it is possible to hypothesize the existence of multiple paracrine and/or autocrine loops in TET, particularly in the high-risk ones, involved in TET growth and progression. Anti-angiogenic agents, directed to inhibit these loops, are therefore to be considered as potential tools in advanced TET therapy.
Insights
High-risk thymic epithelial tumors (TET) show increased expression of vascular endothelial growth factor (VEGF) family members and their receptors. These findings suggest anti-angiogenic therapies could be effective for advanced TET.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Tumor angiogenesis is crucial for tumor growth and a therapeutic target.
- Angiogenesis inhibitors targeting VEGF are FDA-approved.
- Targeted therapies for rare thymic epithelial tumors (TET) are limited.
Purpose of the Study:
- To investigate angiogenesis-related biomarkers in TET.
- To identify potential therapeutic targets for TET.
Main Methods:
- Immunohistochemistry was used to analyze 200 TET samples.
- Expression of VEGFA, VEGFC, VEGFD, VEGFR1, VEGFR2, VEGFR3, and PDGFRβ was assessed.
- Tissue Micro Arrays (TMA) were utilized.
Main Results:
- High-risk TET exhibited higher expression of VEGFA, VEGFC, VEGFD, VEGFR1, VEGFR2, and VEGFR3 compared to low-risk tumors.
- No significant difference in PDGFRβ expression was observed.
- P-values < 0.05 indicate statistical significance for observed differences.
Conclusions:
- Multiple paracrine and/or autocrine loops involving angiogenesis are present in TET, especially high-risk types.
- These loops contribute to TET growth and progression.
- Anti-angiogenic agents warrant consideration for advanced TET treatment.
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