[Resistance to the calcemic action of parathyroid hormone in chronic renal failure]. 2001

K Miyamoto, and M Ito, and M Kuwahata
Department of Nutritional, School of Medicine, Tokushima University.

It is widely believed that the main mechanism of hypocalcemia in chronic renal failure is the blunted skeletal response to PTH, probably due to appearance of PTH7-84 or PTHR down-regulation in bone. We indicated that the down-regulation of renal PTHR mRNA could contribute to the development of the skeletal resistance for PTH in CRF rats. In addition, the presence of high circulating levels of non-1-84 PTH fragments (most likely 7-84 PTH) detected by the intact assay and the 1-84 PTH explain the need of high levels of intact PTH to prevent adynamic bone disease.

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