title: SHP-1 in cell-cycle regulation.
abstract: The reversible phosphorylation of tyrosine residues in proteins, which is governed by the balanced action of protein tyrosine kinases (PTKs) and protein tyrosine phosphatases (PTPs), is a key element of the signaling pathways that are involved in the control of cell proliferation. Deregulation of either of these key regulators leads to abnormal cell signaling, which is largely associated with human pathologies including cancer. This review focuses on recent studies on the role of the protein tyrosine phosphatase SHP-1 on cell-cycle regulation and its possible roles in tumour onset and progression. SHP-1 is a PTP with two SH2 domains that is expressed in haematopoietic cells and, moderately, in many other cell types, especially malignant epithelial cells. SHP-1 regulates cell proliferation, whether it is by controlling mitogenic pathways activated by receptors with tyrosine kinase activity, or by regulating components of the cell-cycle machinery such as CDK2, p27 and cyclin D1. Since several inhibitors targeting SHP-1 have demonstrated their value in cancer treatment, this phosphatase has been proposed as a therapeutic target for this pathology.
authors.affiliation: Department of Biochemistry and Molecular Biology, University of Alcalá, Alcalá de Henares, Madrid, Spain.
authors.forename: Pilar
authors.initials: P
authors.lastname: López-Ruiz
authors.forename: Javier
authors.initials: J
authors.lastname: Rodriguez-Ubreva
authors.forename: Ariel Ernesto
authors.initials: AE
authors.lastname: Cariaga
authors.forename: María Alicia
authors.initials: MA
authors.lastname: Cortes
authors.forename: Begoña
authors.initials: B
authors.lastname: Colás
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology; D002453:Cell Cycle / Q000187:drug effects / Q000502:physiology*; D049109:Cell Proliferation / Q000187:drug effects; D004791:Enzyme Inhibitors / Q000494:pharmacology; D006801:Humans; D010766:Phosphorylation / Q000187:drug effects; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6 / Q000037:antagonists & inhibitors / Q000378:metabolism*; D013329:Structure-Activity Relationship
chemical_list: D000970:Antineoplastic Agents; D004791:Enzyme Inhibitors; C509249:PTPN6 protein, human; D053824:Protein Tyrosine Phosphatase, Non-Receptor Type 6; C509248:Ptpn6 protein, mouse