tailieunhanh - Báo cáo y học: "Regulation of chondrocyte gene expression by osteogenic protein-1"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Regulation of chondrocyte gene expression by osteogenic protein-1. | Chubinskaya et al. Arthritis Research Therapy 2011 13 R55 http content 13 2 R55 RESEARCH ARTICLE Open Access Regulation of chondrocyte gene expression by osteogenic protein-1 Cl I 1 S n I 11 I 1 I -S 1 2 3 rỉ h - o 1 c n c r I V4 I r fffrrVi ỉ D r r -i i 1 5 I n 1 Al z t r4 h t l I f D I I S z t ZM 6 s r-J Susan Chubinskaya Lori Otten Stephan Soeder Jeffrey A Borgia ihomas Aigner David C Rueger ana Richard F Loeser7 Abstract Introduction The objective of this study was to investigate which genes are regulated by osteogenic protein-1 OP-1 in human articular chondrocytes using Affimetrix gene array in order to understand the role of OP-1 in cartilage homeostasis. Methods Chondrocytes enzymatically isolated from 12 normal ankle cartilage samples were cultured in high-density monolayers and either transfected with OP-1 antisense oligonucleotide in the presence of lipofectin or treated with recombinant OP-1 100 ng ml for 48 hours followed by RNA isolation. Gene expression profiles were analyzed by HG-U133A gene chips from Affimetrix. A cut-off was chosen at difference from controls. Selected gene array results were verified by real-time PCR and by in vitro measures of proteoglycan synthesis and signal transduction. Results OP-1 controls cartilage homeostasis on multiple levels including regulation of genes responsible for chondrocyte cytoskeleton cyclin D Talin1 and Cyclin M1 matrix production and other anabolic pathways transforming growth factor-beta TGF-b bone morphogenetic protein BMP insulin-like growth factor IGF vascular endothelial growth factor VEGF genes responsible for bone formation and so on as well as regulation of cytokines neuromediators and various catabolic pathways responsible for matrix degradation and cell death. In many of these cases OP-1 modulated the expression of not only the ligands but also their receptors mediators of downstream signaling kinases responsible for an activation of the pathways binding proteins .

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