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Published on: September 18, 2013
Src-family tyrosine kinases as therapeutic targets in advanced cancer
1Department of Cancer Genetics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA. Irwin.Gelman@roswellpark.org
Abstract:
Src-family tyrosine kinases (SFK) play critical roles in mediating many cellular pathways such as proliferation, adhesion, survival, differentiation and cell motility. There is clear evidence that SFK activity is increased in many human cancers, either through gene amplification, transcriptional upregulation, posttranslational modification by activated upstream growth factor receptors, and even in rare cases, by mutations known to increase intrinsic tyrosine kinase activity in oncoviral forms of SFK. Many recent studies using animal models of human cancer seem to indicate that SFK may only be appropriate therapeutic targets in a subset of primary tumors because of the existence of multiple independent pathways that mediate oncogenic signaling. In contrast, SFK seem to be required for specific parameters of malignant progression, such as recurrence and/or metastasis- especially involving growth in the bone microenvironment. The resulting development of SFK antagonists, and their progression through clinical trials, has brought renewed focus on this tyrosine kinase family as critical mediators of the so-called lethal phenotype of cancer.
Insights
Src-family tyrosine kinases (SFK) are crucial in cancer cell functions and are often overactive in tumors. While not always effective against primary tumors, SFK are key targets for treating cancer metastasis and recurrence.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Src-family tyrosine kinases (SFK) regulate essential cellular processes including proliferation, adhesion, and motility.
- Elevated SFK activity is a common hallmark in human cancers, driven by genetic alterations or upstream signaling.
- SFK are implicated in cancer progression, particularly metastasis and bone microenvironment colonization.
Purpose of the Study:
- To investigate the role of SFK in cancer progression and metastasis.
- To evaluate SFK as therapeutic targets in the context of malignant phenotypes.
Main Methods:
- Review of existing literature on SFK function in cancer.
- Analysis of data from animal models of human cancer.
- Examination of clinical trial data for SFK antagonists.
Main Results:
- SFK activity is dysregulated in various human cancers.
- SFK may not be universally effective targets for primary tumors due to pathway redundancy.
- SFK are critical for specific aspects of malignant progression, including metastasis and recurrence, especially in bone.
Conclusions:
- SFK are vital mediators of the lethal aspects of cancer, such as metastasis.
- SFK antagonists represent a promising therapeutic strategy for targeting cancer recurrence and metastasis.
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