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HISTOCHEMICAL EVIDENCE OF PROTEOLYSIS IN BONE: THE INFLUENCE OF PARATHORMONE

LEONARD F. BÉLANGER 1 and B. B. MIGICOVSKY 1

1 Department of Histology and Embryology, Faculty of Medicine, University of Ottawa and Animal Research Division, Research Branch, Canada Department of Agriculture, Ottawa, Canada

Proteolytic activity has been revealed at the level of the large osteocytes of young chick and rat bone by digestion of gelatin in a photographic emulsion substrate.

The reaction was enhanced by pretreatment of the animals with parathyroid extract.

The reaction was inhibited by addition to the incubating medium of sodium fluoride or potassium ferrocyanide. It was also inhibited by fixation in ethanol-formaldehyde acetic acid.

The present results seem to confirm and explain further the resorptive potential of the mature osteocytes.

Submitted on April 10, 1963


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J. W. Little, J. C. Wilson, H. C. Bickley, and C. Bickley
Effects of Parathyroid Extract on the Rupture Strength of Intact Skin of the Rat
Journal of Dental Research, January 1, 1977; 56(1): 46 - 47.
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J. W. Little, H. C. Bickley, and G. Hines
Effect of Parathyroid Extract on the Development of Wound Rupture Strength
Journal of Dental Research, May 1, 1966; 45(3): 848 - 852.
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