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Updated: Jun 30, 2026

Monitoring Functionality and Morphology of Vasculature Recruited by Factors Secreted by Fast-growing Tumor-generating Cells
Published on: November 23, 2014
Role of angiogenesis in the response to anticancer therapies
1Lilly Research Laboratories, Lilly Corporate Cencer, Indianapolis, IN 46285, USA. TEICHER_BEVERLY_A@Lilly.com
Abstract:
Most solid tumors develop a vasculature (angiogenesis) as they increase in mass. Elucidation of the process by which blood vessels form in tumors has revealed the existence of both positive and negative regulators produced and secreted by many cell types. Angiogenesis has been identified as a critical process in mass expansion in most solid tumors, and numerous molecules have been described to be antiangiogenic agents. The question of whether antiangiogenic therapy is compatible with cytotoxic anticancer therapy has been addressed in the Lewis lung tumor with TNP-470 and minocycline along with radiation therapy and chemotherapy. Although the antiangiogenic therapy had no effect on the tumor size, administration of TNP-470/minocycline increased drug delivery to the tumor and tumor response to cytotoxic therapy increased implicating a potential role for these agents in the treatment of solid tumors.
Insights
Antiangiogenic therapy, combined with chemotherapy, did not shrink tumors but enhanced drug delivery and improved treatment response in Lewis lung tumors. This suggests potential for combined antiangiogenic and cytotoxic cancer therapies.
Area of Science:
- Oncology
- Tumor Biology
- Angiogenesis Research
Background:
- Solid tumors require angiogenesis (new blood vessel formation) for growth.
- Antiangiogenic agents can inhibit tumor vascularization.
- The compatibility of antiangiogenic therapy with conventional treatments is under investigation.
Purpose of the Study:
- To evaluate the combined effects of antiangiogenic agents (TNP-470/minocycline) with radiation and chemotherapy.
- To determine if antiangiogenic therapy impacts tumor response to cytotoxic treatments.
Main Methods:
- Lewis lung tumor model was used.
- Tumors were treated with TNP-470 and minocycline, alongside radiation therapy and chemotherapy.
Main Results:
- Antiangiogenic therapy alone did not affect tumor size.
- Combined treatment significantly increased drug delivery to the tumor.
- Tumor response to cytotoxic therapy was enhanced.
Conclusions:
- Antiangiogenic agents like TNP-470/minocycline may improve the efficacy of chemotherapy and radiation.
- These agents show potential for enhancing solid tumor treatment by improving drug delivery.
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