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HMGA2 overexpression with specific chromosomal abnormalities predominate in CALR and ASXL1 mutated myelofibrosis.
Leukemia
December 2024
Division of Hematology/Oncology, Department of Medicine, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Although multiple genetic events are thought to play a role in promoting progression of the myeloproliferative neoplasms (MPN), the individual events that are associated with the development of more aggressive disease phenotypes remain poorly defined. Here, we report that novel genomic deletions at chromosome 12q14.3, as detected by a high-resolution array comparative genomic hybridization plus single nucleotide polymorphisms platform, occur in 11% of MPN patients with myelofibrosis (MF) and MPN-accelerated/blast phase (AP/BP) but was not detected in patients with polycythemia vera or essential thrombocythemia.
View Article and Find Full Text PDFPrenatal Diagnosis of Proteus Syndrome: About a Case.
Am J Med Genet A
December 2024
Constitutional Genetics Laboratory, CHU Amiens Picardie, Amiens, France.
Proteus syndrome (PS) is a rare disorder (< 1/1000000), marked by progressive overgrowth commonly impacting the skeleton, skin, adipose tissue, and central nervous system. Clinical criteria were established in 2019. PS arises from a somatic activating variation in the AKT1 gene.
View Article and Find Full Text PDFComprehensive Genetic Testing for Coexisting Marfan and Loeys-Dietz Syndromes in Hereditary Thoracic Aortic Disease.
JACC Case Rep
December 2024
Department of Cardiovascular Medicine, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan.
Hereditary thoracic aortic disease (HTAD) is a rare heritable condition with several subtypes, including Marfan syndrome (MFS), vascular Ehlers-Danlos syndrome, and Loeys-Dietz syndrome (LDS). Although MFS is the most common type of HTAD caused by mutations in , differentiation from other conditions such as LDS is crucial due to the varying clinical courses. We report the case of a family history of early-onset ascending aortic dissection initially diagnosed as MFS based on a pathogenic variant of .
View Article and Find Full Text PDFComparative Karyotype Analysis of Lycoris aurea Herb Populations Using Fluorochrome Banding and 45S and 5S rDNA-FISH.
J Vis Exp
November 2024
College of Biological and Food Engineering, Hunan University.
To understand karyotype variation in eight populations, detailed karyotypes were meticulously established using chromosomal measurements, fluorescence bands, and rDNA FISH signals. The number of 45S rDNA sites varies from one to five pairs per population, with the most common number per karyotype being four pairs. The 45S rDNA locus is predominantly located in the short arms and terminal regions of chromosomes, while the 5S rDNA locus is found mainly in the short arm and the terminal or proximal regions.
View Article and Find Full Text PDFDetection and characterization of copy-number variants from exome sequencing in the DDD study.
Genet Med Open
January 2024
Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom.
Purpose: Structural variants such as multiexon deletions and duplications are an important cause of disease but are often overlooked in standard exome/genome sequencing analysis. We aimed to evaluate the detection of copy-number variants (CNVs) from exome sequencing (ES) in comparison with genome-wide low-resolution and exon-resolution chromosomal microarrays (CMAs) and to characterize the properties of de novo CNVs in a large clinical cohort.
Methods: We performed CNV detection using ES of 9859 parent-offspring trios in the Deciphering Developmental Disorders (DDD) study and compared them with CNVs detected from exon-resolution array comparative genomic hybridization in 5197 probands from the DDD study.
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