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The dual kinase complex FAK-Src as a promising therapeutic target in cancer
Victoria Bolós1, Joan Manuel Gasent, Sara López-Tarruella
1Pfizer Oncology, Madrid, Spain;
Abstract:
Focal adhesion kinase (FAK) and steroid receptor coactivator (Src) are intracellular (nonreceptor) tyrosine kinases that physically and functionally interact to promote a variety of cellular responses. Plenty of reports have already suggested an additional central role for this complex in cancer through its ability to promote proliferation and anoikis resistance in tumor cells. An important role for the FAK/Src complex in tumor angiogenesis has also been established. Furthermore, FAK and Src have been associated with solid tumor metastasis through their ability to promote the epithelial mesenchymal transition. In fact, a strong correlation between increased FAK/Src expression/phosphorylation and the invasive phenotype in human tumors has been found. Additionally, an association for FAK/Src with resistances to the current anticancer therapies has already been established. Currently, novel anticancer agents that target FAK or Src are under development in a broad variety of solid tumors. In this article we will review the normal cellular functions of the FAK/Src complex as an effector of integrin and/or tyrosine kinase receptor signaling. We will also collect data about their role in cancer and we will summarize the most recent data from the FAK and Src inhibitors under clinical and preclinical development. Furthermore, the association of both these proteins with chemotherapy and hormonal therapy resistances, as a rationale for new combined therapeutic approaches with these novel agents, to abrogate treatment associated resistances, will also be reviewed.
Insights
The focal adhesion kinase (FAK) and steroid receptor coactivator (Src) complex drives cancer progression, metastasis, and treatment resistance. Inhibitors targeting FAK and Src show promise for overcoming these challenges in solid tumors.
Area of Science:
- Oncology
- Molecular Biology
- Cellular Signaling
Background:
- Focal adhesion kinase (FAK) and steroid receptor coactivator (Src) are intracellular tyrosine kinases that interact to regulate cellular functions.
- The FAK/Src complex is implicated in cancer, promoting tumor cell proliferation, anoikis resistance, angiogenesis, and epithelial-mesenchymal transition.
- Increased FAK/Src expression and phosphorylation correlate with invasive phenotypes and resistance to anticancer therapies.
Purpose of the Study:
- To review the normal cellular functions of the FAK/Src complex.
- To consolidate data on the role of FAK/Src in cancer.
- To summarize the clinical and preclinical development of FAK and Src inhibitors and their potential to overcome treatment resistance.
Main Methods:
- Literature review of FAK/Src complex functions in normal and cancer cells.
- Analysis of existing data on FAK/Src expression and phosphorylation in human tumors.
- Compilation of information on FAK and Src inhibitors in clinical and preclinical development.
- Review of FAK/Src association with chemotherapy and hormonal therapy resistance.
Main Results:
- The FAK/Src complex is a key effector of integrin and tyrosine kinase receptor signaling.
- FAK/Src activity is crucial for tumor growth, angiogenesis, invasion, and metastasis.
- FAK/Src signaling contributes to resistance against current anticancer treatments.
- Novel FAK and Src inhibitors are under development for various solid tumors.
Conclusions:
- The FAK/Src complex plays a critical role in multiple facets of cancer progression and therapeutic resistance.
- Targeting FAK and Src represents a promising strategy for novel cancer therapies.
- Combined therapeutic approaches using FAK/Src inhibitors may overcome existing treatment resistances.
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