Dissecting Pin1 and phospho-pRb regulation.
Publication/Presentation Date
1-1-2013
Abstract
The activity of the Retinoblastoma protein, the master regulator of the cell cycle, is finely regulated by phosphorylation. CDKs and cyclins are major players in phosphorylation and it has been recently discovered that the prolyl isomerase Pin1 is an essential protein that orchestrates this process. In this article, we report new findings regarding the role of Pin1 in the pRb pathway. Our data suggest that PI3K, CDKs, and the Pin1 axis have a critical role in sustaining the complete phosphorylation of pRb. Furthermore, we analyze the correlation between Pin1 and pRb phosphorylation in vivo. We show that, in human malignant glioma tissue microarrays (TMA) and in Pin1 knockout (KO) mice, there is a positive correlation between Pin1 and pRb phosphorylation. Prospectively, our findings suggest that the synergism between CDKs, Pin1, and PI3K inhibitors hold great promise for targeted pharmacological treatment of cancer patients, with the possibility of reaching high effectiveness at tolerated doses.
Volume
228
Issue
1
First Page
73
Last Page
77
ISSN
1097-4652
Published In/Presented At
Rizzolio, F., Caligiuri, I., Lucchetti, C., Fratamico, R., Tomei, V., Gallo, G., Agelan, A., Ferrari, G., Toffoli, G., Klein-Szanto, A. J., & Giordano, A. (2013). Dissecting Pin1 and phospho-pRb regulation. Journal of cellular physiology, 228(1), 73–77. https://doi.org/10.1002/jcp.24107
Disciplines
Medicine and Health Sciences
PubMedID
22553088
Department(s)
Department of Medicine, Hematology-Medical Oncology Division
Document Type
Article