Pycnodysostosis: role and regulation of cathepsin K in osteoclast function and human disease.

Abstract excerpt

Patients with pycnodysostosis, a rare skeletal dysplasia, present with bone abnormalities such as short stature, acroosteolysis of distal phalanges, and skull deformities. The disease is caused by a deficiency of the cysteine protease cathepsin K which is responsible for degradation of collagen type I and other bone proteins. Osteoclasts, bone cells of hematopoietic origin responsible for bone mineral as well as...

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