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The insulin-like growth factor system as a treatment target in breast cancer
1Department of Medicine and Pharmacology, University of Minnesota Cancer Center, Minneapolis, MN 55455, USA.
Abstract:
Advances in breast cancer treatment have come from the recognition that pathways relevant to cancer cell biology could be identified and targeted. There is abundant in vitro, animal model, and epidemiologic evidence to suggest that the insulin-like growth factors (IGFs) play a role in regulating the malignant phenotype in breast cancer. Insulin-like growth factor action has been implicated in malignant transformation, cellular proliferation, protection from apoptosis, and metastasis. Because IGFs interact with specific cell surface receptors to affect intracellular signaling pathways, blockade of receptor activation could be a successful method to interrupt IGF-driven processes. In contrast to other transmembrane growth factor receptors, the IGF receptor requires activation by ligand. Thus, neutralization of ligand by a "target decoy" could be a useful method to inhibit IGF action. Use of an IGF-binding protein to inhibit activation of IGF receptors will be discussed.
Insights
Targeting insulin-like growth factors (IGFs) offers a promising strategy for breast cancer treatment. Neutralizing IGF ligand with a target decoy can inhibit IGF receptor activation, blocking cancer progression.
Area of Science:
- Oncology
- Molecular Biology
- Endocrinology
Background:
- Breast cancer progression is linked to specific cellular pathways.
- Insulin-like growth factors (IGFs) are implicated in malignant transformation, proliferation, apoptosis resistance, and metastasis in breast cancer.
Purpose of the Study:
- To explore the role of insulin-like growth factors (IGFs) in breast cancer.
- To discuss strategies for inhibiting IGF action in breast cancer treatment.
Main Methods:
- Review of in vitro, animal model, and epidemiologic evidence.
- Discussion of targeting cell surface receptors and ligand neutralization.
Main Results:
- IGF signaling pathways are crucial in regulating the malignant phenotype of breast cancer.
- Blockade of IGF receptor activation can interrupt IGF-driven processes.
Conclusions:
- Inhibiting IGF action presents a viable therapeutic strategy for breast cancer.
- Neutralization of IGF ligand, potentially using IGF-binding proteins as a target decoy, is a promising approach to block IGF receptor activation and impede breast cancer progression.
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