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TGF-β cascade regulation by PPP1 and its interactors -impact on prostate cancer development and therapy
Luís Korrodi-Gregório1, Joana Vieira Silva, Luís Santos-Sousa
1Signal Transduction Laboratory, Centre for Cell Biology, Biology Department, Health Sciences Department, University of Aveiro, Aveiro, Portugal.
Abstract:
Protein phosphorylation is a key mechanism by which normal and cancer cells regulate their main transduction pathways. Protein kinases and phosphatases are precisely orchestrated to achieve the (de)phosphorylation of candidate proteins. Indeed, cellular health is dependent on the fine-tune of phosphorylation systems, which when deregulated lead to cancer. Transforming growth factor beta (TGF-β) pathway involvement in the genesis of prostate cancer has long been established. Many of its members were shown to be hypo- or hyperphosphorylated during the process of malignancy. A major phosphatase that is responsible for the vast majority of the serine/threonine dephosphorylation is the phosphoprotein phosphatase 1 (PPP1). PPP1 has been associated with the dephosphorylation of several proteins involved in the TGF-β cascade. This review will discuss the role of PPP1 in the regulation of several TGF-β signalling members and how the subversion of this pathway is related to prostate cancer development. Furthermore, current challenges on the protein phosphatases field as new targets to cancer therapy will be addressed.
Insights
Phosphoprotein phosphatase 1 (PPP1) regulates the transforming growth factor beta (TGF-β) pathway. Deregulation of PPP1 and TGF-β signaling contributes to prostate cancer development, highlighting phosphatases as potential cancer therapy targets.
Area of Science:
- Molecular Biology
- Cellular Signaling
- Oncology
Background:
- Protein phosphorylation is crucial for cellular signal transduction.
- Dysregulation of phosphorylation pathways, including the transforming growth factor beta (TGF-β) pathway, is implicated in cancer.
- Prostate cancer development is linked to alterations in TGF-β signaling.
Purpose of the Study:
- To review the role of phosphoprotein phosphatase 1 (PPP1) in regulating TGF-β signaling.
- To explore the connection between PPP1, TGF-β pathway subversion, and prostate cancer.
- To discuss challenges and opportunities in targeting protein phosphatases for cancer therapy.
Main Methods:
- Literature review focusing on protein phosphatases, specifically PPP1.
- Analysis of studies investigating TGF-β pathway members and their phosphorylation states.
- Examination of research linking phosphatase activity to prostate cancer progression.
Main Results:
- PPP1 is a key phosphatase involved in serine/threonine dephosphorylation.
- PPP1 dephosphorylates several proteins within the TGF-β signaling cascade.
- Aberrant PPP1 activity may contribute to prostate cancer pathogenesis through TGF-β pathway dysregulation.
Conclusions:
- PPP1 plays a significant role in controlling TGF-β signaling.
- The interplay between PPP1 and TGF-β is critical in prostate cancer.
- Protein phosphatases represent promising, yet challenging, targets for novel cancer therapeutics.
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