title: SHP-1, a novel peptide isolated from seahorse inhibits collagen release through the suppression of collagenases 1 and 3, nitric oxide products regulated by NF-kappaB/p38 kinase.
abstract: Considerable efforts have been taken to identify natural peptides as potential bioactive substances. In this study, novel peptide (SHP-1) derived from seahorse (Hippocampus, Syngnathidae) hydrolysate was explored for its inhibitory effects on collagen release in arthritis with the investigation of its underlying mechanism of action. The efficacy of SHP-1 was determined on cartilage protective effects such as inhibition of collagen and GAG release. SHP-1 was able to suppress not only the expression of collagenases 1 and 3, but also the production of NO via down-regulation of iNOS. However, it presented an irrelevant effect on the level of GAG release in chondrocytic and osteoblastic cells. Inhibition of collagen release by SHP-1 is associated with restraining the phosphorylation of NF-kappaB and p38 kinase cascade. Therefore, it could be suggested that SHP-1 has a potential to be used in arthritis treatment.
authors.affiliation: Department of Chemistry, Pukyong National University, Busan, Republic of Korea.
authors.forename: BoMi
authors.initials: B
authors.lastname: Ryu
authors.forename: Zhong-Ji
authors.initials: ZJ
authors.lastname: Qian
authors.forename: Se-Kwon
authors.initials: SK
authors.lastname: Kim
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002356:Cartilage / Q000737:chemistry / Q000378:metabolism; D002460:Cell Line / Q000187:drug effects; D003094:Collagen / Q000187:drug effects / Q000378:metabolism*; D017364:Collagenases / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D005109:Extracellular Matrix / Q000378:metabolism; D006801:Humans; D053509:Matrix Metalloproteinase 13 / Q000378:metabolism*; D061965:Matrix Metalloproteinase Inhibitors; D020782:Matrix Metalloproteinases / Q000378:metabolism; D008969:Molecular Sequence Data; D016328:NF-kappa B / Q000037:antagonists & inhibitors / Q000378:metabolism*; D009569:Nitric Oxide / Q000378:metabolism*; D052247:Nitric Oxide Synthase Type II / Q000378:metabolism; D010455:Peptides / Q000235:genetics / Q000378:metabolism* / Q000494:pharmacology; D015398:Signal Transduction / Q000187:drug effects; D023701:Smegmamorpha; D048051:p38 Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism*
chemical_list: D061965:Matrix Metalloproteinase Inhibitors; D016328:NF-kappa B; D010455:Peptides; D009569:Nitric Oxide; D003094:Collagen; D052247:Nitric Oxide Synthase Type II; D048051:p38 Mitogen-Activated Protein Kinases; D017364:Collagenases; D053509:Matrix Metalloproteinase 13; D020782:Matrix Metalloproteinases; C417249:collagenase 1