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Bone Metabolism THE ACUTE EFFECTS OF HORMONES, VITAMIN D3, AND ACIDOSIS DURING in Vivo PERFUSION OF ADULT DOG FORELIMBS
VU VAN NGUYEN; JENIFER JOWSEY
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From the Section of Surgical Research, Mayo Clinic and Mayo Foundation and the Department of Orthopedic Surgery, Mayo Graduate School of Medicine, University of Minnesota
1970 by The Journal of Bone and Joint Surgery, Incorporated
J Bone Joint Surg Am, 1970 Jul 01;52(5):1041-1049
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Abstract

A perfusion technique was used to study the in vivo effect on bone of parathyroid extract, calcitonin, thyroxine, cortisone, vitamin D3, and acidosis (citric and hydrochloric acids), independent of the reaction of the body, in adult mongrel dogs. The right forelimb was perfused, and the left forelimb served as control site. The material to be studied was mixed with isotonic saline and infused into an artery. All venous return was drained out of the perfused limb through a catheter. Serum calcium, phosphorus, specific gravity, pH, and alkaline phosphatase were determined in arterial and venous blood at intervals during the four-hour perfusion period. The third and fourth metatarsals of both limbs were studied by histological and microradiographic methods. Parathyroid extract increased both bone resorption and bone formation, with hypercalcemia, hyperphosphatemia, and proliferation of osteoclasts. Calcitonin increased bone formation and caused hypocalcemia. Vitamin D3 increased bone formation. Thyroxine enhanced both bone formation and bone resorption, resulting in hypercalcemia and hyperphosphatemia. Citric and hydrochloric acids produced increased levels of serum calcium and phosphorus and decreased pH. However, only citric acid increased bone resorption. There appeared to be no direct effect of cortisone on bone.

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    Accreditation Statement
    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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