title: AKAP12 induces apoptotic cell death in human fibrosarcoma cells by regulating CDKI-cyclin D1 and caspase-3 activity.
abstract: AKAP12 (A-Kinase anchoring protein 12) is a protein kinase C substrate and a potential tumor suppressor. AKAP12 is down-regulated by several oncogenes and strongly suppressed in various cancers including prostate, ovarian and breast cancers. AKAP12 acts as a regulator of mitogenesis by anchoring key signal proteins such as PKA, PKC, and cyclins. In this study, AKAP12 was found to suppress tumor cell viability by inducing apoptosis via caspase-3 in HT1080 cells. This AKAP12-induced apoptosis was associated with a decreased expression of Bcl-2 and increased expression of Bax. Moreover, AKAP12-transfectant strongly induced the expression of Cip1/p21 and Kip1/p27, but resulted in a decrease in cyclin D1 involved in G(1) progression. Accordingly, these results suggest that AKAP12 may play an important role in tumor growth suppression by inducing apoptosis with the regulation of multiple molecules in the cell cycle progression.
authors: NeuroVascular Coordination Research Center, Division of Pharmaceutical Biosciences, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, Republic of Korea.
authors: Dae-Kwan
authors: DK
authors: Yoon
authors: Chul-Ho
authors: CH
authors: Jeong
authors: Hyoung Oh
authors: HO
authors: Jun
authors: Kwang-Hoon
authors: KH
authors: Chun
authors: Jong-Ho
authors: JH
authors: Cha
authors: Ji Hae
authors: JH
authors: Seo
authors: Hae Young
authors: HY
authors: Lee
authors: Yoon Kyung
authors: YK
authors: Choi
authors: Bum-Ju
authors: BJ
authors: Ahn
authors: Seung-Ki
authors: SK
authors: Lee
authors: Kyu-Won
authors: KW
authors: Kim
mesh_terms: D054758:A Kinase Anchor Proteins; D017209:Apoptosis / Q000502:physiology*; D015153:Blotting, Western; D053148:Caspase 3 / Q000378:metabolism*; D018797:Cell Cycle Proteins / Q000235:genetics / Q000502:physiology*; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000502:physiology; D019938:Cyclin D1 / Q000378:metabolism*; D050756:Cyclin-Dependent Kinase Inhibitor Proteins / Q000378:metabolism*; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism; D050760:Cyclin-Dependent Kinase Inhibitor p27; D053938:DNA Fragmentation; D005354:Fibrosarcoma / Q000378:metabolism / Q000473:pathology; D005434:Flow Cytometry; D016193:G1 Phase / Q000502:physiology; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism; D008856:Microscopy, Fluorescence; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000378:metabolism; D014162:Transfection; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism; D051028:bcl-2-Associated X Protein / Q000378:metabolism
chemical_list: D054758:A Kinase Anchor Proteins; C491162:AKAP12 protein, human; C494826:BAX protein, human; C493956:CDKN1A protein, human; C436291:CDKN1B protein, human; D018797:Cell Cycle Proteins; D050756:Cyclin-Dependent Kinase Inhibitor Proteins; D050759:Cyclin-Dependent Kinase Inhibitor p21; D047908:Intracellular Signaling Peptides and Proteins; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53; D051028:bcl-2-Associated X Protein; D019938:Cyclin D1; D050760:Cyclin-Dependent Kinase Inhibitor p27; D053148:Caspase 3