title: Cyclic AMP suppresses matrix metalloproteinase-1 expression through inhibition of MAPK and GSK-3beta.
abstract: Expression of matrix metalloproteinase-1 (MMP-1) is stimulated by diverse stimuli and is likely to be regulated by many signaling pathways. cAMP is known to act as a second messenger for various extracellular stimuli and to be involved in the regulation of cell proliferation, apoptosis, and inflammation. Here, we investigated the effect of cAMP on tumor necrosis factor (TNF)-alpha-induced MMP-1 expression and the molecular events involved in the processes in human skin fibroblasts. We showed that cAMP suppresses TNF-alpha-induced MMP-1 expression via protein kinase A (PKA) pathway. cAMP inhibited TNF-alpha-stimulated ERK and JNK activation, which was shown to have an important role in MMP-1 expression. However, MMP-1 expression could also be inhibited by cAMP even when ERK and JNK activities were unaffected, indicating that there might be other target(s) that mediate cAMP-mediated suppression of MMP-1 expression. Further studies revealed that glycogen synthase kinase (GSK)-3beta can be inactivated by cAMP/PKA pathway and has important roles in MMP-1 expression, and showed that inactivation of GSK-3beta is critical for suppression of MMP-1 expression by cAMP elevation after TNF-alpha treatment. Taken together, our results suggest that cAMP/PKA pathway can suppress MMP-1 expression through inhibition of multiple signaling pathways, including MAPK and GSK-3beta.
authors.affiliation: Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Chi-Hyun
authors.initials: CH
authors.lastname: Park
authors.forename: Youngji
authors.initials: Y
authors.lastname: Moon
authors.forename: Chung Min
authors.initials: CM
authors.lastname: Shin
authors.forename: Jin Ho
authors.initials: JH
authors.lastname: Chung
mesh_terms: D002478:Cells, Cultured; D005576:Colforsin / Q000494:pharmacology; D000242:Cyclic AMP / Q000378:metabolism*; D017868:Cyclic AMP-Dependent Protein Kinases / Q000378:metabolism; D004789:Enzyme Activation / Q000187:drug effects / Q000502:physiology; D004815:Epidermal Growth Factor / Q000378:metabolism / Q000494:pharmacology; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects / Q000201:enzymology*; D038362:Glycogen Synthase Kinase 3 / Q000378:metabolism*; D000071679:Glycogen Synthase Kinase 3 beta; D020662:Guanine Nucleotide Exchange Factors / Q000378:metabolism; D006801:Humans; D053583:Interleukin-1beta / Q000378:metabolism / Q000494:pharmacology; D007546:Isoquinolines / Q000494:pharmacology; D048031:JNK Mitogen-Activated Protein Kinases / Q000378:metabolism; D020935:MAP Kinase Signaling System / Q000187:drug effects / Q000502:physiology*; D020781:Matrix Metalloproteinase 1 / Q000378:metabolism*; D015290:Second Messenger Systems / Q000187:drug effects / Q000502:physiology; D012867:Skin / Q000166:cytology*; D013449:Sulfonamides / Q000494:pharmacology; D013722:Teprotide / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D020662:Guanine Nucleotide Exchange Factors; D053583:Interleukin-1beta; D007546:Isoquinolines; C116122:RAPGEF3 protein, human; D013449:Sulfonamides; D014409:Tumor Necrosis Factor-alpha; D005576:Colforsin; D004815:Epidermal Growth Factor; D013722:Teprotide; D000242:Cyclic AMP; C000605506:GSK3B protein, human; D000071679:Glycogen Synthase Kinase 3 beta; D017868:Cyclic AMP-Dependent Protein Kinases; D048049:Extracellular Signal-Regulated MAP Kinases; D048031:JNK Mitogen-Activated Protein Kinases; D038362:Glycogen Synthase Kinase 3; C522360:MMP1 protein, human; D020781:Matrix Metalloproteinase 1; C063509:N-(2-(4-bromocinnamylamino)ethyl)-5-isoquinolinesulfonamide