Bone Abstracts

Bone is the primary site of metastasis for breast cancer, which leads mainly to osteolytic lesions, Cancer cells can expand into the bone for their ability to ‘dialogue’ with resident cells, interfering with the physiological processes of bone turnover. In this study, a large-scale analysis comparing gene expression of biopsies of bone and visceral metastases from human breast cancer patients showed that the receptor (G protein-coupled) activity modifying protein-2 (...

Objective: In many traumatic or pathological conditions, bone turnover is low and osteoclast activity is reduced or abolished. We developed innovative hydroxyapatite (HA) scaffolds carrying RANKL expressing cells with the aim of supporting bone resorption when this is defective. Membrane-bound (m)RANKL is cleaved into soluble (s)RANKL by MMP14. We hypothesized that the osteoclastogenic potential of RANKL-producing cells could be improved if they were seeded on scaffolds engine...

see PP405....

In autosomal recessive osteopetrosis due to mutations of the TNFSF11 gene, deficiency of the pro-osteoclastogenic cytokine RANKL prevents osteoclast formation. RANKL is a membrane-bound protein cleaved into active soluble (s)RANKL by various enzymes, including metalloproteinase 14 (MMP14). We created a bio-device that released sRANKL and induced osteoclastogenesis in tnfsf11−/− mice. We tested various RANKL cell sources, and used mouse primary calvarial osteoblasts...