Inactivating PTH/PTHrP signaling disorders (iPPSDs): Evaluation of the new classification in a multicenter large series of 544 molecularly characterized patients

Arrate Pereda, Francesca M. Elli, Suzanne Thiele, Luisa de Sanctis, Anya Rothenbuhler, Patrick Hanna, Bruno Francou, Diana Alexandra Ertl, Guiomar Perez de Nanclares, Agnès Linglart, Giovanna Mantovani

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: Pseudohypoparathyroidism and related disorders belong to a group of heterogeneous rare diseases that share an impaired signaling downstream of Gsα-protein-coupled receptors. Affected patients may present with various combination of symptoms including resistance to PTH and/or to other hormones, ectopic ossifications, brachydactyly type E, early onset obesity, short stature and cognitive difficulties. Several years ago we proposed a novel nomenclature under the term of inactivating PTH/PTHrP signaling disorders (iPPSD). It is now of utmost importance to validate these criteria and/or improve the basis of this new classification. Design: Retrospective study of a large international series of 459 probands and 85 relatives molecularly characterized. Methods: Information on major and minor criteria associated with iPPSD and genetic results were retrieved from patient files. We compared the presence of each criteria according to the iPPSD subtype, age and gender of the patients. Results: More than 98% of the probands met the proposed criteria for iPPSD classification. Noteworthy, most patients (85%) presented a combination of symptoms rather than a single sign suggestive of iPPSD and the overlap among the different genetic forms of iPPSD was confirmed. The clinical and molecular characterization of relatives identified familial history as an additional important criterion predictive of the disease. Conclusions: The phenotypic analysis of this large cohort confirmed the utility of the major and minor criteria and their combination to diagnose iPPSD. This report shows the importance of having simple and easily recognizable signs to diagnose with confidence these rare disorders and supports a better management of patients.

Original languageEnglish
Pages (from-to)311-320
Number of pages10
JournalEuropean Journal of Endocrinology
Volume184
Issue number2
DOIs
Publication statusPublished - Feb 2021

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

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