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[PTH-like tumor peptide and malignant hypercalcemia].

R Rizzoli1, J P Bonjour

  • 1Département de médecine, Hôpital cantonal universitaire, Genève.

Schweizerische Medizinische Wochenschrift
|August 19, 1989
PubMed
Summary

Malignant hypercalcemia in some patients involves a tumoral protein similar to parathyroid hormone, causing bone resorption and altered kidney function. This protein may also play a role in normal bodily regulation.

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Area of Science:

  • Endocrinology
  • Oncology
  • Nephrology

Context:

  • Malignant hypercalcemia shares features with primary hyperparathyroidism, including enhanced bone resorption and renal tubular calcium/phosphate dysregulation.
  • A novel tumoral protein implicated in this syndrome has been identified.
  • This protein exhibits structural and functional similarities to parathyroid hormone.

Purpose:

  • To describe a tumoral protein responsible for malignant hypercalcemia.
  • To investigate the protein's homology with parathyroid hormone.
  • To explore its potential role in physiological regulatory functions.

Summary:

  • Patients with malignant hypercalcemia can exhibit bone resorption and renal handling of calcium and phosphate akin to primary hyperparathyroidism.
  • A newly identified tumoral protein, produced by a different gene than parathyroid hormone, shows N-terminal homology to the hormone.
  • Both proteins demonstrate similar effects, suggesting the parathyroid hormone-analogue may influence normal physiological regulation.

Impact:

  • Identifies a potential molecular mechanism for malignant hypercalcemia.
  • Suggests a link between a tumoral protein and endocrine/renal disturbances.
  • Opens avenues for understanding parathyroid hormone-analogue functions in both disease and physiology.

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