Abstract:
:The mitotic cell cycle is a tightly regulated process that ensures the correct division of one cell into two daughter cells. Progress along the different phases of the cell cycle is positively regulated by the sequential activation of a family of serine-threonine kinases called CDKs (Cyclin Dependent Kinases). Their activity is counteracted by small proteins known as CDK inhibitors (CKI) that ensure the correct timing of CDK activation in the different phases of the cell cycle. The present review will deal with the role of one of this CKI, p27(kip1), in human cancer, focusing in particular on the mechanisms underlying its functional inactivation in tumor cells. p27(kip1) protein downregulation is usually achieved by proteasomal degradation and is often correlated to a worse prognosis in several types of human cancers, resulting in the reduction of disease free and overall survival. More recently, it has been proposed that p27(kip1) protein, rather than degraded, can be functionally inactivated. The mechanisms and the implications of these two types of p27(kip1) deregulation will be discussed and some potential therapeutic approaches targeting p27(kip1) functions will be proposed.
journal_name
Curr Med Chemjournal_title
Current medicinal chemistryauthors
Belletti B,Nicoloso MS,Schiappacassi M,Chimienti E,Berton S,Lovat F,Colombatti A,Baldassarre Gdoi
10.2174/0929867054367149subject
Has Abstractpub_date
2005-01-01 00:00:00pages
1589-605issue
14eissn
0929-8673issn
1875-533Xjournal_volume
12pub_type
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