MKRN3 circulating levels in girls with central precocious puberty caused by MKRN3 gene mutations.
Central precocious puberty
Children
MKRN3
Molecular screening
Mutation screening
Serum MKRN3
Journal
Journal of endocrinological investigation
ISSN: 1720-8386
Titre abrégé: J Endocrinol Invest
Pays: Italy
ID NLM: 7806594
Informations de publication
Date de publication:
19 Dec 2023
19 Dec 2023
Historique:
received:
21
07
2023
accepted:
21
11
2023
medline:
19
12
2023
pubmed:
19
12
2023
entrez:
19
12
2023
Statut:
aheadofprint
Résumé
MKNR3 is a paternally expressed gene whose mutations are the main cause of central precocious puberty (CPP). Protein circulating levels can be easily measured, as demonstrated in idiopathic CPP and healthy controls. No data are available for patients harboring an MKRN3 mutation. Our aim was to perform MKRN3 mutation screening and to investigate if circulating protein levels could be a screening tool to identify MKRN3 mutation in CPP patients. We enrolled 140 CPP girls and performed MKRN3 mutation analysis. Patients were stratified into two groups: idiopathic CPP (iCPP) and MKRN3 mutation-related CPP (MKRN3-CPP). Clinical characteristics were collected. Serum MKRN3 values were measured by a commercially available ELISA assay kit in MKRN3-CPP and a subgroup of 15 iCPP patients. We identified 5 patients with MKRN3 mutations: one was a novel mutation (p.Gln352Arg) while the others were previously reported (p.Arg328Cys, p.Arg345Cys, p.Pro160Cysfs*14, p.Cys410Ter). There was a significant difference in circulating MKRN3 values in MKRN3-CPP compared to iCPP (p < 0.001). In MKRN3-CPP, the subject harboring Pro160Cysfs*14 presented undetectable levels. Subjects carrying the missense mutations p.Arg328Cys and p.Gln352Arg showed divergent circulating protein levels, respectively 40.56 pg/mL and undetectable. The patient with the non-sense mutation reported low but measurable MKRN3 levels (12.72 pg/mL). MKRN3 defect in patients with CPP cannot be predicted by MKRN3 circulating levels, although those patients presented lower protein levels than iCPP. Due to the great inter-individual variability of the assay and the lack of reference values, no precise cut-off can be identified to suspect MKRN3 defect.
Identifiants
pubmed: 38112911
doi: 10.1007/s40618-023-02255-5
pii: 10.1007/s40618-023-02255-5
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Università degli Studi della Campania Luigi Vanvitelli
ID : 390
Informations de copyright
© 2023. The Author(s), under exclusive licence to Italian Society of Endocrinology (SIE).
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