title: Expression of p27 and MAPK proteins involved in all-trans retinoic acid-induced apoptosis and cell cycle arrest in matched primary and metastatic melanoma cells.
abstract: We investigated whether p27 and mitogen-activated protein kinase (MAPK) proteins were involved in all-trans retinoic acid (atRA)-induced apoptosis and cell cycle arrest. Matched primary and metastatic melanoma cells were exposed to atRA. Apoptosis and cell cycle were detected by flow cytometry. Expression of p27, Ras, B-raf, Mek and Erk proteins was examined. Results showed that atRA induced apoptosis and cell cycle arrest in both primary and metastatic melanoma cells. The primary melanoma cells were more vulnerable than their matched metastatic cells. Expression of p27 was increased, while MAPK proteins were decreased, this response was dose- and time-dependent. Alterations of these proteins were more pronounced in primary melanoma cells than in the matched metastases. These data indicate that up-regulation of p27 and down-regulation of MAPK proteins were involved in atRA-induced apoptosis and cell cycle arrest in melanoma.
authors.affiliation: Division of Dermatology, Clinical Research Centre, Department of Biomedicine and Surgery, Linköping University, SE-581 85 Linköping, Sweden. hong.zhang@ibk.liu.se
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Inger
authors.initials: I
authors.lastname: Rosdahl
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D002453:Cell Cycle / Q000187:drug effects; D018797:Cell Cycle Proteins / Q000096:biosynthesis* / Q000494:pharmacology*; D050760:Cyclin-Dependent Kinase Inhibitor p27; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors; D016147:Genes, Tumor Suppressor; D006801:Humans; D008545:Melanoma / Q000473:pathology*; D020928:Mitogen-Activated Protein Kinases / Q000096:biosynthesis* / Q000494:pharmacology*; D009362:Neoplasm Metastasis; D012878:Skin Neoplasms / Q000473:pathology*; D014212:Tretinoin / Q000494:pharmacology*; D025521:Tumor Suppressor Proteins / Q000096:biosynthesis* / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D018797:Cell Cycle Proteins; D004791:Enzyme Inhibitors; D025521:Tumor Suppressor Proteins; D050760:Cyclin-Dependent Kinase Inhibitor p27; D014212:Tretinoin; D020928:Mitogen-Activated Protein Kinases