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Research

Apoptosis – a significant cause of bone cell death in osteonecrosis of the femoral head



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Abstract

Osteonecrosis of the femoral head usually affects young individuals and is responsible for up to 12% of total hip arthroplasties. The underlying pathophysiology of the death of the bone cells remains uncertain. We have investigated nitric oxide mediated apoptosis as a potential mechanism and found that steroid- and alcohol-induced osteonecrosis is accompanied by widespread apoptosis of osteoblasts and osteocytes. Certain drugs or their metabolites may have a direct cytotoxic effect on cancellous bone of the femoral head leading to apoptosis rather than purely necrosis.


Correspondence should be sent to Mr J. D. F. Calder at Kepper’s Cottage, Swarraton Farm, Alresford, Hampshire SO24 9UD, UK.

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