Osteocyte alterations contribute to bone pathology in Gaucher disease

MUCCI J.M.; FERREYRA-COMPAGNUCCI M.; CRIVARO A.; BONDAR C.; ORMAZABAL M.; DELPINO M.; ROZENFELD P.

Zaragoza

Congreso; EWGGD 2016; 2016

The aim of our work was to evaluate the involvement of osteocytes in the bone pathology of Gaucher disease (GD). The study was performed with an in vitro model using the MLO-Y4 osteocyte cell line treated with CBE at different time points. Osteoclastogenic potential of conditioned media (CM) from CBE treated ostecytes was evaluated by osteoclast differentiation assays, and RANKL levels were evaluated by immunofluorescence. Connexin-43 expression was assessed by qPCR and apoptosis was studied by Annexin-V and TUNEL stainings. To study the mechanism on osteoclast differentiation, the apoptotic body fraction of the CM and its supernatant were obtained by centrifugation. Both fractions were used in osteoclastogenesis assays with or without OPG. The CM from CBE treated osteocytes induced higher levels of osteoclast differentiation (p