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Published in: Journal of Endocrinological Investigation 1/2022

01-01-2022 | Denosumab | Original Article

Mechanisms of acute hypercalcemia in pediatric patients following the interruption of Denosumab

Authors: A. Deodati, D. Fintini, E. Levtchenko, M. Rossi, G. Ubertini, H. Segers, G. Battafarano, M. Cappa, A. Del Fattore

Published in: Journal of Endocrinological Investigation | Issue 1/2022

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Abstract

Purpose

Denosumab is a fully human monoclonal anti-RANK-L antibody that is clinically used to counteract the bone loss induced by exacerbated osteoclast activity. Indeed, its binding to RANK-L prevents the interaction RANK-L/receptor RANK that is essential for osteoclastogenesis and bone resorbing activity. Although there are many medications available to treat bone loss diseases, including bisphosphonates, Denosumab is highly effective since it reduces the bone erosion. The use in pediatric patients is safe. However, some concerns are related to the interruption of the treatment. Indeed, in this study, we reported hypercalcemia in two pediatric patients and alterations of circulating osteoclast precursors.

Methods

Peripheral Blood Mononuclear Cells (PBMC) were isolated from two pediatric patients with hypercalcemia after Denosumab interruption and from 10 controls. Cytofluorimetric analysis and in vitro osteoclastogenesis experiments were performed.

Results

Increase of CD16CD14+CD11b+ cells was revealed in PBMC from patients reflecting the enhanced in vitro osteoclastogenesis.

Conclusion

Our data suggest that precautions must be taken when Denosumab therapy is interrupted and gradual decrease of dose and/or timing of treatment should be performed. To prevent the onset of hypercalcemia that could be in the discontinuation phase, cytofluorimetric analysis of PBMC should be performed to evaluate osteoclast precursors.
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Metadata
Title
Mechanisms of acute hypercalcemia in pediatric patients following the interruption of Denosumab
Authors
A. Deodati
D. Fintini
E. Levtchenko
M. Rossi
G. Ubertini
H. Segers
G. Battafarano
M. Cappa
A. Del Fattore
Publication date
01-01-2022
Publisher
Springer International Publishing
Published in
Journal of Endocrinological Investigation / Issue 1/2022
Electronic ISSN: 1720-8386
DOI
https://doi.org/10.1007/s40618-021-01630-4

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