Bone morphogenetic protein-2 (BMP-2), a member of the transforming growth factor-beta (TGF-beta) family, regulates osteoblast differentiation and bone formation. Here we show a novel function of BMP-2 in human osteoblasts and identify a signaling pathway involved in this function. BMP-2 promotes apoptosis in primary human calvaria osteoblasts and in immortalized human neonatal calvaria osteobla...

BACKGROUND TRPV6 ion channels are key mediators of regulated transepithelial absorption of Ca2+ within the small intestine. Trpv6-/- mice were reported to have lower bone density than wild-type littermates and significant disturbances in calcium homeostasis that suggested a role for TRPV6 in osteoblasts during bone formation and mineralization. TRPV6 and molecules related to transepithelial Ca2...

It is known that parathyroid hormone (PTH) activates the cyclic AMP (cAMP) signalling pathway in osteoblasts. In recent years it has been suggested that an elevation of the intracellular free Ca2+ concentration ([Ca2+]i) may also be involved in the regulation of osteoblast function by PTH. However, this remains controversial. Here we investigated the effect of PTH on the [Ca2+]i of ROS 17/2.8 c...

results treatments through mirnas can prove to be beneficial due to its small size, easy synthesis, targeted and quick delivery. conclusions further work is needed to be done to make mirna treatments available to large number of people suffering from various bone diseases. context mirnas can regulate the expression of genes by interfering in their mrnas, acting as key regulators of diverse cell...

Background & Aims: Tissue engineering using somatic cells and synthetic extracellular matrix (scaffold) represents a new approach for regeneration of mineralized tissue and bone. This study was carried out to investigate the ability of a PLLA/HA scaffold to culture osteoblast cells in a three dimensional milieu. Method: Three bony samples were taken from extraction sites during surgical extract...

Objective: To explore the mechanism of circRNA-vgll3 in osteogenic differentiation human bone marrow mesenchymal stem cells. Methods: BMSCs cells were transfected with circRNA-vgll3, and divided into high-level group, low-level negative control group (circRNA-vgll3 not transfected) according to amount transfection. The proliferation apoptosis osteoblasts each analyzed, alkaline phosphatase (ALP...

Heterotopic ossification (HO) is the pathologic formation of bone separate from the normal skeleton. Although several models exist for studying HO, an understanding of the common in vitro properties of cells isolated from these models is lacking. We studied three separate animal models of HO including two models of trauma-induced HO and one model of genetic HO, and human HO specimens, to charac...

Fibroblast growth factor receptor signaling is an important mechanism regulating osteoblast function. To gain an insight into the regulatory role of FGF receptor-2 (FGFR2) signaling in osteoblasts, we investigated integrin-mediated attachment and cell survival in human calvarial osteoblasts expressing activated FGFR2. FGFR2 activation reduced osteoblast attachment on fibronectin. This was assoc...

Objective We previously reported that human OA subchondral bone osteoblasts could be discriminated into two subpopulations identifi ed by their levels of endogenous production (low [L] or high [H]) of PGE2. Here, we investigated the OPG and RANKL expression levels, the histologic analysis of the subchondral bone as well as the osteoclast differentiation effect of osteoblasts on normal and both ...