Rabbit Anti-BMP7 Polyclonal antibody

Cartilage interstitial fluid (CIF) containing bFGF, IGF1, TGF beta 1, BMP7, MCSF, GCSF, LIF and CIF-like cocktail, composed of agents found in CIF, changed the expression of many genes in cells of the synovial membrane. Because the main type of cells of the synovial membrane are fibroblast-like cells, in the present work we evaluated the response of dermal fibroblasts to CIF and CIF-like cocktail and compared it with the response of synovial membrane cells. In the presence of CIF, fibroblasts changed shape from roughly polygonal to spindle-like, elongated cells. Real-time PCR showed that CIF stimulated expression of HAS1, HAS2, MMP3, TGF beta 1, TNF and IL6 while expression of collagen type I, versican, aggrecan, MMP2, TIMP2, TIMP3, and IL1 beta was inhibited. The CIF-like cocktail stimulated expression of HAS1, HAS2, collagen type I, TGF beta 1and TNF. Both exerted a similar effect on the expression of HAS1, TGF beta 1, TNF and had no influence on TIMP1 and lubricin expression. The CIF-like cocktail, contrary to CIF, did not influence versican, aggrecan, MMP2, MMP3, TIMP2, TIMP3, IL1 beta and IL6 expression.

A principal purpose of tissue engineering is the augmentation, repair or replacement of diseased or injured human tissue. This study was undertaken to determine whether human biopsies as a cell source could be utilized for successful engineering of human phalanges consisting of both bone and cartilage. This paper reports the use of cadaveric human chondrocytes and periosteum as a model for the development of phalanx constructs. Two factors, osteogenic protein-1 [OP-1/bone morphogenetic protein-7 (BMP7)], alone or combined with insulin-like growth factor (IGF-1), were examined for their potential enhancement of chondrocytes and their secreted extracellular matrices. Design of the study included culture of chondrocytes and periosteum on biodegradable polyglycolic acid (PGA) and poly-l-lactic acid (PLLA)-poly-epsilon-caprolactone (PCL) scaffolds and subsequent implantation in athymic nu/nu (nude) mice for 5, 20, 40 and 60weeks. Engineered constructs retrieved from mice were characterized with regard to genotype and phenotype as a function of developmental (implantation) time. Assessments included gross observation, X-ray radiography or microcomputed tomography, histology and gene expression. The resulting data showed that human cell-scaffold constructs could be successfully developed over 60weeks, despite variability in donor age. Cartilage formation of the distal phalanx models enhanced with both OP-1 and IGF-1 yielded more cells and extracellular matrix (collagen and proteoglycans) than control chondrocytes without added factors. Summary data demonstrated that human distal phalanx models utilizing cadaveric chondrocytes and periosteum were successfully fabricated and OP-1 and OP-1/IGF-1 accelerated construct development and mineralization. The results suggest that similar engineering and transplantation of human autologous tissues in patients are clinically feasible. Copyright (c) 2016 John Wiley & Sons, Ltd.