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Mimicking the Function of Signaling Proteins: Toward Artificial Signal Transduction Therapy
Published on: September 29, 2016
Modulation of signal-transduction pathways by chemopreventive agents
M M Manson1, K A Holloway, L M Howells
1MRC Toxicology Unit, University of Leicester, UK.
Abstract:
For a disease such as cancer, where a number of alterations to normal cell function accumulate over time, there are several opportunities to inhibit, slow down or even reverse the process. Many of the changes which drive the disease process occur in cell-signalling pathways that regulate proliferation and apoptosis. As our knowledge of these complicated signalling networks improves, it is becoming clear that many molecules, both drugs and naturally occurring dietary constituents, can interact beneficially with deregulated pathways. Aspirin and other non-steroidal anti-inflammatory drugs, as well as natural compounds present in plants such as green vegetables and tea, can modulate signalling by affecting kinase activity and therefore phosphorylation of key molecules. Examples of pathways which can be modulated by these agents include activation of the transcription factor nuclear factor kappaB by tumour promoters or cytokines, signalling by growth factors through the growth-factor receptor/extracellular-regulated protein kinase pathways and by a number of other molecules through the stress-activated c-Jun N-terminal kinase and p38 pathways. These mitogen-activated protein kinase pathways regulate a number of transcription factors including c-Fos and c-Jun. Evidence exists, at least from in vitro experiments, that by targeting such pathways, certain dietary compounds may be able to restore abnormal rates of apoptosis and proliferation to more normal levels.
Insights
Certain dietary compounds and drugs like aspirin can modulate cell signaling pathways involved in cancer. These interventions may help restore normal cell proliferation and apoptosis, offering potential cancer prevention strategies.
Area of Science:
- Molecular biology
- Cellular signaling
- Cancer research
Background:
- Cancer involves accumulated alterations in normal cell function, particularly in cell-signaling pathways regulating proliferation and apoptosis.
- Understanding these complex signaling networks reveals opportunities for therapeutic intervention.
Purpose of the Study:
- To explore how various molecules, including drugs and dietary compounds, can beneficially interact with deregulated cell signaling pathways in cancer.
- To investigate the potential of targeting specific pathways to restore normal cellular processes.
Main Methods:
- Review of existing literature on molecular modulators of cell signaling.
- Analysis of how non-steroidal anti-inflammatory drugs and natural plant compounds affect kinase activity and phosphorylation.
- Examination of pathways such as nuclear factor kappaB, growth factor signaling, and stress-activated protein kinase pathways (c-Jun N-terminal kinase, p38).
Main Results:
- Non-steroidal anti-inflammatory drugs and natural compounds from green vegetables and tea can modulate kinase activity and phosphorylation.
- These agents impact key signaling pathways including NF-κB, growth factor receptor/ERK, JNK, and p38 pathways.
- In vitro evidence suggests dietary compounds can target these pathways to normalize abnormal proliferation and apoptosis.
Conclusions:
- Modulation of deregulated cell signaling pathways by drugs and dietary compounds presents therapeutic opportunities for cancer.
- Targeting specific molecular pathways, such as mitogen-activated protein kinase pathways, may restore normal cell function.
- Dietary compounds show potential in restoring abnormal cell proliferation and apoptosis rates to normal levels.
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