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Published on: December 19, 2019
Src: regulation, role in human carcinogenesis and pharmacological inhibitors
1Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, PA, USA. alexander.tsygankov@temple.edu
Abstract:
The cellular signaling machinery is a complex network of cross-talking proteins that enables dynamic communication between upstream causal factors and downstream effectors. Non-receptor tyrosine kinases, including Src, are the intermediates of signal transfer, controlling pathways as diverse as cell growth, death, differentiation, migration, and genome maintenance. When expressed as viral genes these proteins are potent carcinogens. Furthermore, analogous genetic alterations are observed, albeit not frequently, in human tumors. In a variety of tumors including those derived from the colon and breast, Src is either over expressed or constitutively active in a large percentage of patients. Increased expression or activity of Src correlates with the stage and metastatic potential of some neoplasia. The detailed knowledge of Src activation facilitates rational design of drugs that potentially interfere with either binding of ATP or substrate peptides. Several existing inhibitors are available as lead compounds for further development of Src inhibitors.
Insights
The study highlights the role of Src, a non-receptor tyrosine kinase, in cell signaling and cancer. Understanding Src activation is key to developing targeted cancer therapies and inhibitors.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Cellular signaling relies on complex protein networks for communication.
- Non-receptor tyrosine kinases, such as Src, are crucial intermediates in signal transduction pathways.
- Viral Src genes are potent carcinogens, and similar alterations occur in human tumors.
Purpose of the Study:
- To elucidate the role of Src in cellular signaling and its implications in cancer.
- To explore the correlation between Src expression/activity and cancer progression.
- To identify Src as a potential therapeutic target for cancer treatment.
Main Methods:
- Analysis of Src protein expression and activity in various tumor types.
- Investigation of Src's involvement in cell growth, death, differentiation, migration, and genome maintenance.
- Review of existing Src inhibitors for drug development.
Main Results:
- Src is overexpressed or constitutively active in a significant percentage of colon and breast cancer patients.
- Increased Src activity correlates with advanced tumor stage and metastatic potential.
- Knowledge of Src activation mechanisms aids in rational drug design.
Conclusions:
- Src plays a significant role in cancer development and progression.
- Targeting Src activation presents a promising strategy for cancer therapy.
- Existing Src inhibitors serve as valuable lead compounds for developing novel anti-cancer drugs.
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