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Published on: April 24, 2015
Insulinlike growth factors and binding proteins in colon cancer
1Department of Anatomy and Neurosciences, University of Texas Medical Branch, Galveston.
Abstract:
Insulinlike growth factors (IGFs) express anabolic and mitogenic activity on wide variety of cells. Besides endocrine effects, IGFs have major autocrine and paracrine effects on many cellular functions. Two factors that significantly affect the extent of cellular response to IGFs include the membrane receptors for IGFs and the soluble binding proteins (BPs), which modulate the action of IGFs at the receptor level. IGFs, IGF receptors, and IGFs and their BPs (IGF-BPs) thus constitute three components of the IGF system. A role of IGFs in the transformation and proliferation of cancer cells has become increasingly evident in the past few years. Studies from several laboratories show that all three components of the IGF system may play an important role in the proliferation of colon cancers. It was recently shown that the relative expression of IGFs and IGF/BPs may critically control the metastatic potential of colon cancers. The purpose of this article is to summarize our current knowledge of the IGF system and to present support for a significant role of IGFs in the initiation and growth of colon cancers. The expression and structural aspects of IGFs, their receptors, and BPs are outlined first, followed by a discussion of the role of IGFs in gastrointestinal functions and in colon cancers.
Insights
Insulinlike growth factors (IGFs) and their binding proteins (IGF-BPs) are crucial in colon cancer growth and metastasis. Understanding the IGF system is key to targeting colon cancer progression.
Area of Science:
- Endocrinology
- Molecular Biology
- Oncology
Background:
- Insulinlike growth factors (IGFs) exhibit anabolic and mitogenic effects on various cells.
- IGFs exert endocrine, autocrine, and paracrine functions, influencing cellular activities.
- Cellular response to IGFs is modulated by IGF membrane receptors and soluble binding proteins (BPs).
Purpose of the Study:
- To summarize current knowledge of the Insulinlike Growth Factor (IGF) system.
- To provide evidence supporting a significant role of IGFs in colon cancer initiation and progression.
- To review the expression and structural aspects of IGFs, receptors, and BPs in relation to gastrointestinal functions and colon cancers.
Main Methods:
- Literature review and synthesis of existing research on the IGF system.
- Analysis of studies investigating IGFs, IGF receptors, and IGF-BPs in colon cancer.
- Examination of the relationship between IGF system components and colon cancer proliferation and metastasis.
Main Results:
- The three components of the IGF system (IGFs, IGF receptors, IGF-BPs) are implicated in colon cancer proliferation.
- Relative expression of IGFs and IGF-BPs may critically influence the metastatic potential of colon cancers.
- IGFs play a significant role in the initiation and growth of colon cancers.
Conclusions:
- The IGF system is integral to the development and progression of colon cancer.
- Further research into the IGF system's role in colon cancer is warranted.
- Targeting the IGF system holds potential for colon cancer therapeutic strategies.
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