title: A radicicol-related macrocyclic nonaketide compound, antibiotic LL-Z1640-2, inhibits the JNK/p38 pathways in signal-specific manner.
abstract: Macrocyclic nonaketide compounds, radicicol and its two analogues, 87-250904-F1 and LL-Z1640-2, have various biological activities. Here we show that these compounds inhibit signal-dependent transcriptional activation with different specificity with distinct mechanism. Although all three compounds inhibited PMA-induced AP-1 transcriptional activity in cell-based reporter assay, these compounds exhibited differential effects in separate transcriptional reporter assays for NF-kappaB and glucocorticoid receptor. Next we found that one of these compounds, LL-Z1640-2, was a signal-specific inhibitor of the JNK/p38 pathways. In contrast to LL-Z1640-2, radicicol and 87-250904-F1 did not inhibit JNK/p38 activation. Recently, radicicol was reported as an inhibitor of activated-Ras-induced ERK activation. These results indicated that radicicol and LL-Z1640-2 showed distinct specificity to various MAP kinase pathways despite their structural similarity. Furthermore, LL-Z-1640-2 inhibited anisomycin-induced but not TNF-induced JNK/p38 activation, indicating that the inhibition mechanism is signal-specific.
authors: Pharmaceutical Research Laboratories, Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki 2, 10-0861, Japan.
authors: K
authors: K
authors: Takehana
authors: S
authors: S
authors: Sato
authors: T
authors: T
authors: Kobayasi
authors: T
authors: T
authors: Maeda
mesh_terms: D016475:3T3 Cells; D051698:Activating Transcription Factor 2; D000818:Animals; D000841:Anisomycin / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000037:antagonists & inhibitors* / Q000378:metabolism; D002460:Cell Line; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism; D015870:Gene Expression / Q000187:drug effects; D006367:HeLa Cells; D006801:Humans; D048031:JNK Mitogen-Activated Protein Kinases; D007783:Lactones / Q000737:chemistry / Q000494:pharmacology*; D018942:Macrolides; D051379:Mice; D020928:Mitogen-Activated Protein Kinases; D010766:Phosphorylation / Q000187:drug effects; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism; D011965:Receptors, Glucocorticoid / Q000037:antagonists & inhibitors / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects*; D013755:Tetradecanoylphorbol Acetate / Q000037:antagonists & inhibitors / Q000494:pharmacology; D018808:Transcription Factor AP-1 / Q000378:metabolism; D014157:Transcription Factors / Q000378:metabolism; D014162:Transfection; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D048051:p38 Mitogen-Activated Protein Kinases
chemical_list: C118717:87 250904-F1; D051698:Activating Transcription Factor 2; D000900:Anti-Bacterial Agents; D017362:Cyclic AMP Response Element-Binding Protein; C118715:LL Z1640-2; D007783:Lactones; D018942:Macrolides; D016755:Proto-Oncogene Proteins c-jun; D011965:Receptors, Glucocorticoid; D018808:Transcription Factor AP-1; D014157:Transcription Factors; D014409:Tumor Necrosis Factor-alpha; D000841:Anisomycin; D017871:Calcium-Calmodulin-Dependent Protein Kinases; D048031:JNK Mitogen-Activated Protein Kinases; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; C035359:monorden; D013755:Tetradecanoylphorbol Acetate