Bone morphogenetic protein 2 and mechanical loading both regulate early bone morphogenetic protein signalling events. (a) hFOB were seeded on collagen scaffolds and subjected to BMP2 stimulation, mechanical loading or a combination of both. Protein lysates were analysed by western blot using specific antibodies. (b) Quantification of western blot analysis depicting phosphoprotein levels normalized to GAPDH. Bar charts represent means ± SEM from three independent experiments; *P < 0.05. (c) hFOBs were seeded on collagen scaffolds and subjected for 90 minutes to BMP2 stimulation, mechanical loading or a combination of both. Gene expression was analysed by qRT-PCR. Bar charts summarize four independent experiments and depict means ± SEM; *P < 0.05; **P < 0.01. BMP: bone morphogenetic protein; GAPDH: glyceraldehyde-3-phosphate dehydrogenase; hFOB: human fetal osteoblast; qRT-PCR: quantitative reverse transcriptase polymerase chain reaction; SEM: standard error of the mean.
Kopf et al. BMC Biology 2012 10:37 doi:10.1186/1741-7007-10-37