Abstract:
OBJECTIVE:Experimental and clinical data suggest that statins may protect bone by inhibiting bone resorption and/or stimulating bone formation. Interleukin-6 (IL-6) is produced by osteoblasts, and potently stimulates osteoclast activation playing a key role in normal bone resorption as well as in post-menopausal and inflammation-driven osteoporosis. Although statins inhibit IL-6 production from different cell types, currently no data exist on osteoblasts. The aim of the study was to evaluate the effect of rosuvastatin on IL-6 production by human osteoblasts. METHODS:Osteoblasts from osteoarthritic patients were incubated with rosuvastatin (0.1-10 μmol/L)±IL-1β, and IL-6 production was evaluated as cytokine concentration in the culture medium (ELISA), as well as mRNA expression in the cells (qPCR). Putative intracellular mechanisms of the drug, such as blocking HMG-CoA-reductase, and interference in the prenylation process were investigated by the addition of mevalonate and isoprenoids. The effect of rosuvastatin±IL-1β on the anti-resorptive molecule osteoprotegerin (OPG) was also assessed (ELISA). RESULTS:Rosuvastatin significantly reduced IL-6 levels in the osteoblast culture medium, both in unstimulated and IL-1β-stimulated cells. This effect was reversed by mevalonate or geranylgeraniol, but not farnesol. Moreover, the drug decreased both spontaneous and IL-1β-induced IL-6 mRNA expression in osteoblasts. Conversely, rosuvastatin did not affect OPG levels in the culture medium. CONCLUSION:Our results show that rosuvastatin decreases IL-6 production by osteoblasts, thereby suggesting a possible inhibiting activity on osteoclast function in an indirect way. These data may provide further rationale for employing rosuvastatin to beneficially affect bone metabolism in post-menopausal women and possibly in inflammation-driven osteoporosis.
journal_name
Joint Bone Spinejournal_title
Joint bone spineauthors
Lazzerini PE,Capperucci C,Spreafico A,Capecchi PL,Niccolini S,Ferrata P,Frediani B,Galeazzi M,Laghi-Pasini Fdoi
10.1016/j.jbspin.2012.07.007subject
Has Abstractpub_date
2013-03-01 00:00:00pages
195-200issue
2eissn
1297-319Xissn
1778-7254pii
S1297-319X(12)00178-9journal_volume
80pub_type
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