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Disruption of calcineurin in osteoblasts increases bone formation and reduces bone resorption

Feb 3, 2009

Calcineurin is a protein phosphatase that regulates several physiological processes and is the target for cyclosporine A. Pharmacological inhibition of calcineurin by low concentrations of cyclosporin A increases osteoblast differentiation in vitro and bone mass in vivo. To determine whether calcineurin exerts direct actions on osteoblasts, the authors of a recent study [1] generated mice lacking a calcineurin regulatory subunit selectively in osteoblasts.
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Calcifications in the abdominal aorta predict fractures in men: MINOS Study

Jan 28, 2009

Cardiovascular disease and osteoporotic fractures are two major public health problems. Cardiovascular disease and osteoporosis coexist in women: progression of aortic calcifications has been associated with faster bone loss. Low BMD has been shown to predict cardiovascular events and cardiovascular mortality, whereas the association between the extension of aortic calcifications and hip fracture risk is controversial. In contrast to these findings in women, few studies concern the relationship between osteoporosis and cardiovascular disease in men.
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