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Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays
Published on: September 19, 2018
Growth factor receptor tyrosine kinase inhibitors; clinical development and potential for prostate cancer therapy
1AstraZeneca, Alderley Park, Macclesfield, United Kingdom.
Purpose:
The development of effective, novel, targeted cancer therapies with minimal side effects has long been a goal in cancer research. A key group of targets identified for drug development consists of the receptor tyrosine kinases, which have pivotal roles in the growth factor signaling that is subverted in carcinogenesis and in the host processes, such as angiogenesis, involved in tumor progression.
Materials And Methods:
A literature review of the role of receptor tyrosine kinases in human malignancies is followed by a discussion of the potential use of inhibitors of receptor tyrosine kinases as anticancer therapy, focusing on the epidermal growth factor receptor tyrosine kinase inhibitor gefitinib (Iressa, ZD1839, AstraZeneca, Macclesfield, United Kingdom).
Results:
Several small molecule inhibitors that are specific to individual receptor tyrosine kinases have been developed and a number of these potential anticancer agents are progressing through clinical trials. Various surrogate end points are being assessed to demonstrate the activity of these inhibitors against their targets. Results from studies of gefitinib alone and with the antiandrogen bicalutamide in both hormone dependent and independent prostate tumor xenografts suggested that gefitinib may have potential as monotherapy and combination therapy in the treatment of both forms of the disease. Gefitinib is currently undergoing further preclinical and clinical evaluation for the treatment of prostate cancer.
Conclusions:
A number of tyrosine kinase inhibitors, including gefitinib, are progressing through clinical development and are beginning to provide new treatment options for a range of malignancies.
Insights
Targeted cancer therapies like gefitinib, which inhibit receptor tyrosine kinases, show promise. These novel treatments offer potential new options for various malignancies, including prostate cancer.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Receptor tyrosine kinases (RTKs) are crucial in cell signaling pathways often dysregulated in cancer.
- Targeting RTKs offers a strategy for developing novel, effective cancer therapies with potentially fewer side effects.
- Angiogenesis and other tumor progression processes are influenced by RTK signaling.
Purpose of the Study:
- To review the role of RTKs in human malignancies.
- To discuss the potential of RTK inhibitors as anticancer agents.
- To focus on gefitinib, an epidermal growth factor receptor tyrosine kinase inhibitor.
Main Methods:
- Literature review on RTKs in human cancers.
- Discussion of RTK inhibitors' therapeutic potential.
- Focus on gefitinib's preclinical and clinical evaluation.
Main Results:
- Small molecule RTK inhibitors are in development and clinical trials.
- Gefitinib demonstrated potential in preclinical models of prostate cancer, both as monotherapy and in combination with bicalutamide.
- Further evaluation of gefitinib for prostate cancer treatment is ongoing.
Conclusions:
- Tyrosine kinase inhibitors, such as gefitinib, are advancing in clinical development.
- These inhibitors represent emerging therapeutic options for diverse malignancies.
- Targeted therapies are expanding treatment possibilities in oncology.
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