Genetic alterations frequently are involved in the development of a pituitary adenoma in young age. We here characterize the functional role of a deletion in CDKN1B 5'-UTR region (c.-29_-26delAGAG) identified in an acromegalic patient that developed a growth hormone in pituitary adenoma during childhood. Our results show that the identified novel heterozygous deletion in the CDKN1B 5'-UTR region associates with a reduction in CDKN1B mRNA levels, a predicted altered secondary mRNA structure, and a reduced CDKN1B 5'-UTR transcriptional activity in vitro. The patient displayed loss of heterozygosity in the same CDKN1B 5'-UTR region at tissue level and the 5'UTR region containing the deleted sequence encompasses a GRE. These findings indicate that the identification of functional alterations of newly discovered genetic derangements need to be fully characterized and always correlated with the clinical manifestations.

Early onset acromegaly associated with a novel deletion in CDKN1B 5′UTR region

FOSCHINI, MARIA PIA;
2015

Abstract

Genetic alterations frequently are involved in the development of a pituitary adenoma in young age. We here characterize the functional role of a deletion in CDKN1B 5'-UTR region (c.-29_-26delAGAG) identified in an acromegalic patient that developed a growth hormone in pituitary adenoma during childhood. Our results show that the identified novel heterozygous deletion in the CDKN1B 5'-UTR region associates with a reduction in CDKN1B mRNA levels, a predicted altered secondary mRNA structure, and a reduced CDKN1B 5'-UTR transcriptional activity in vitro. The patient displayed loss of heterozygosity in the same CDKN1B 5'-UTR region at tissue level and the 5'UTR region containing the deleted sequence encompasses a GRE. These findings indicate that the identification of functional alterations of newly discovered genetic derangements need to be fully characterized and always correlated with the clinical manifestations.
Silvia Sambugaro;Mauro Di Ruvo;Maria Rosaria Ambrosio;Natalia S. Pellegata;Mariaenrica Bellio;Alessandra Guerra;Mattia Buratto;Maria Pia Foschini;Federico Tagliati;Ettore degli Uberti;Maria Chiara Zatelli
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/498374
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