Search results for " haploinsufficiency"
showing 6 items of 6 documents
Shox-Haploinsufficiency Intra-Familial Phenotipic Variability and The Impact On Final Height: Report of a Pedigree
2019
SHOX haploinsufficiency (SHOX-D) is a genetic cause of disharmonic short stature. However, the different impact on phenotype can show differences between patients with the same genotype. GH ameliorates final height, with significant differences between patients for the putative role of environmental factors who can influence growth. We describe the case of two sisters with SHOX-D (target height: 146.8 cm (-2.6SDS); mother: 146.5 cm; father: 160 cm). ZM was first evaluated at the age of 6.8 years for disharmonic short stature: stature: 103.5 cm; SPAN: 99 cm. She was affected by SHOX-D (heterozygous missense mutation c414G>C: p.Glu138Asp of the exon 3). The same mutation was first confirme…
GH successful treatment in a female with a de novo 46,XX,add(X)(p36),t(X;Y)(p36.3;p11.2), growth impairment and SHOX-haploinsufficiency
2019
Abstract Children with chromosome translocations, concerning X chromosome, have a genetic pattern different from Turner syndrome; however, when a translocation involves the of part of X chromosome including short stature homeobox-containing Sex-determining Region Y gene, growth may be severely compromised. We describe the clinical case of a 2.2-year-old-female, arrived at our paediatric unit for a decrease of height velocity. The karyotype was 46,XX,add(X)(p36.3). Array comparative genomic hybridization showed a fragment of Y chromosome, extended from 8.803.981 (Yp11.2) to 28.767.604 (Yq11.23). The final karyotype was 46,XX,add(X)(p36),t(X;Y)(p36.3;p11.2). Fluorescence in situ Hybridization…
Haploinsufficiency of the NOTCH1 receptor as a cause of Adams-Oliver syndrome with variable cardiac anomalies
2015
Background— Adams–Oliver syndrome (AOS) is a rare disorder characterized by congenital limb defects and scalp cutis aplasia. In a proportion of cases, notable cardiac involvement is also apparent. Despite recent advances in the understanding of the genetic basis of AOS, for the majority of affected subjects, the underlying molecular defect remains unresolved. This study aimed to identify novel genetic determinants of AOS. Methods and Results— Whole-exome sequencing was performed for 12 probands, each with a clinical diagnosis of AOS. Analyses led to the identification of novel heterozygous truncating NOTCH1 mutations (c.1649dupA and c.6049_6050delTC) in 2 kindreds in which AOS was segregat…
SHOX HAPLOINSUFFICIENCY INTRA FAMILIAL PHENOTIPIC VARIABILITY AND THE IMPACT ON FINAL HEIGHT: REPORT OF A PEDIGREE
2019
SHOX haploinsufficiency (SHOX-D) is a genetic cause of disharmonic short stature. However, the different impact on phenotype can show differences between patients with the same genotype. GH ameliorates final height, with significant differences between patients for the putative role of environmental factors who can influence growth.
SHOX Haploinsufficiency in Short and Not Short Children: A Sigle Italian Cetre Data
2018
SHOX haploinsufficiency (SHOX-D) is a cause of disharmonic short stature and a possible genetic cause of idiopathic short stature also in familial cases. We describe clinical, hormonal and genetic characteristics of patients with SHOX-D haploinsufficiency, followed and treated in the period 2014-2017, in a single Italian centre. The Rappold score was used to screen short children, to select those who needed a genetic analysis of SHOX gene by MLPA and sequencing. We selected 6 patients (5 females; 1 male; age: 1.2-11 years), with documented mutations of the SHOX gene or of the promoter. One patient was already treated with low doses of GH for GHD, documented by 2 tests. One patient had type …
SPEN haploinsufficiency causes a neurodevelopmental disorder overlapping proximal 1p36 deletion syndrome with an episignature of X chromosomes in fem…
2021
Contains fulltext : 231702.pdf (Publisher’s version ) (Closed access) Deletion 1p36 (del1p36) syndrome is the most common human disorder resulting from a terminal autosomal deletion. This condition is molecularly and clinically heterogeneous. Deletions involving two non-overlapping regions, known as the distal (telomeric) and proximal (centromeric) critical regions, are sufficient to cause the majority of the recurrent clinical features, although with different facial features and dysmorphisms. SPEN encodes a transcriptional repressor commonly deleted in proximal del1p36 syndrome and is located centromeric to the proximal 1p36 critical region. Here, we used clinical data from 34 individuals…