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Monitoring Functionality and Morphology of Vasculature Recruited by Factors Secreted by Fast-growing Tumor-generating Cells
Published on: November 23, 2014
Intussusceptive angiogenesis as a key therapeutic target for cancer therapy
Sekaran Saravanan1, Selvaraj Vimalraj2, Koka Pavani2
1Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), Department of Bioengineering, School of Chemical and Biotechnology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India.
Abstract:
Deregulation of angiogenesis is a key reason for tumor growth and progression. Several anti-angiogenic drugs in clinical practice attempt to normalize abnormal tumor vasculature. Unfortunately, these drugs are ineffective due to the development of resistance in patients after drug holidays. A sizable literature suggests that resistance to these anti-angiogenic drugs occurs due to various compensatory mechanisms of tumor angiogenesis. Therefore, we describe different compensatory mechanisms of tumor angiogenesis, and explain why intussusceptive angiogenesis (IA), is a crucial mechanism of compensatory angiogenesis in tumors which resist anti-VEGF (vascular endothelial growth factor) therapies. IA is often overlooked due to the scarcity of experimental models. Therefore, we examine data from existing experimental models and our novel ex-ovo model of angiogenesis in chick embryos, and explain the important genes and signaling pathways driving IA. Using bio-informatic analyses of major genes regulating conventional sprouting angiogenesis (SA) and intussusceptive angiogenesis, we provide fresh insights on the 'angiogenic switch' which regulates the transition from SA to IA. Finally, we examine the interplay between molecules regulating SA, IA, and molecules known to promote tumor progression. Based on these analyses, we conclude that intussusceptive angiogenesis (IA) is a promising therapeutic target for developing effective anti-cancer treatment regimes.
Insights
Tumor growth resistance to anti-angiogenic drugs is linked to compensatory angiogenesis. Intussusceptive angiogenesis (IA) is a key mechanism driving this resistance, making it a promising target for novel cancer therapies.
Area of Science:
- Oncology
- Vascular Biology
- Molecular Biology
Background:
- Tumor growth and progression are driven by deregulated angiogenesis.
- Current anti-angiogenic therapies face challenges due to acquired drug resistance.
- Compensatory angiogenesis mechanisms contribute to treatment failure.
Purpose of the Study:
- To elucidate the role of intussusceptive angiogenesis (IA) in tumors resistant to anti-VEGF therapies.
- To identify key genes and signaling pathways regulating IA.
- To explore IA as a potential therapeutic target for cancer treatment.
Main Methods:
- Review of existing literature on tumor angiogenesis.
- Development and utilization of a novel ex-ovo chick embryo model for IA studies.
- Bio-informatic analysis of genes involved in sprouting angiogenesis (SA) and IA.
- Examination of molecular interplay between SA, IA, and tumor progression factors.
Main Results:
- Intussusceptive angiogenesis (IA) is identified as a critical compensatory mechanism in anti-VEGF resistant tumors.
- Key genes and signaling pathways driving IA were elucidated.
- The 'angiogenic switch' regulating the transition from SA to IA was analyzed.
- Interactions between molecules regulating SA, IA, and tumor progression were investigated.
Conclusions:
- Intussusceptive angiogenesis (IA) plays a vital role in tumor resistance to anti-VEGF therapies.
- Understanding the molecular basis of IA provides insights into overcoming treatment resistance.
- IA represents a promising therapeutic target for developing more effective anti-cancer strategies.
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