Rubinstein-Taybi Syndrome: spectrum of CREBBP mutations in Italian patients, BMC Medical Genetics
Por um escritor misterioso
Last updated 04 março 2025

Background Rubinstein-Taybi Syndrome (RSTS, MIM 180849) is a rare congenital disorder characterized by mental and growth retardation, broad and duplicated distal phalanges of thumbs and halluces, facial dysmorphisms and increased risk of tumors. RSTS is caused by chromosomal rearrangements and point mutations in one copy of the CREB-binding protein gene (CREBBP or CBP) in 16p13.3. To date mutations in CREBBP have been reported in 56.6% of RSTS patients and an average figure of 10% has ascribed to deletions. Methods Our study is based on the mutation analysis of CREBBP in 31 Italian RSTS patients using segregation analysis of intragenic microsatellites, BAC FISH and direct sequencing of PCR and RT-PCR fragments. Results We identified a total of five deletions, two of the entire gene and three, all in a mosaic condition, involving either the 5' or the 3' region. By direct sequencing a total of 14 de novo mutations were identified: 10 truncating (5 frameshift and 5 nonsense), one splice site, and three novel missense mutations. Two of the latter affect the HAT domain, while one maps within the conserved nuclear receptor binding of (aa 1–170) and will probably destroy a Nuclear Localization Signal. Identification of the p.Asn1978Ser in the healthy mother of a patient also carrying a de novo frameshift mutation, questions the pathogenetic significance of the missense change reported as recurrent mutation. Thirteen additional polymorphisms, three as of yet unreported, were also detected. Conclusion A high detection rate (61.3%) of mutations is confirmed by this Italian study which also attests one of the highest microdeletion rate (16%) documented so far.

Ultra-Rare Syndromes: The Example of Rubinstein-Taybi Syndrome. - Abstract - Europe PMC

From Diagnosis to Management : Rubinstein – Taybi Syndrome

Genes, Free Full-Text

High frequency of copy number imbalances in Rubinstein–Taybi patients negative to CREBBP mutational analysis

IJMS, Free Full-Text

Rubinstein–Taybi syndrome - Wikipedia

Histone acetylation deficits in lymphoblastoid cell lines from patients with Rubinstein–Taybi syndrome

PDF) Rubinstein-Taybi Syndrome: spectrum of CREBBP mutations in Italian patients Cristina Gervasini, Lucio Giordano, Paola Castronovo, Patrizia Colapietro, and Angelo Selicorni

First case report of inherited Rubinstein-Taybi syndrome associated with a novel EP300 variant – topic of research paper in Clinical medicine. Download scholarly article PDF and read for free on CyberLeninka open

New insights into genetic variant spectrum and genotype–phenotype correlations of Rubinstein‐Taybi syndrome in 39 CREBBP‐positive patients - Pérez‐Grijalba - 2019 - Molecular Genetics & Genomic Medicine - Wiley Online Library

Rubinstein–Taybi syndrome (CREBBP, EP300)
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