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Balanced Translocation t(3;12) Disrupting HMGA2 and NAALADL2 Genes in Twins With Silver-Russell Syndrome and Intellectual Disability.
Clin Genet
January 2025
Programa de Pós-graduação em Ciências da Saúde, Universidade de Brasília, Brasília, Brazil.
Silver-Russell Syndrome (SRS) is a genetic disorder characterized by intrauterine and postnatal growth restriction. Most cases are caused by an imprinting error either with hypomethylation of the Imprinted Control Region 1 at 11p15.5, or maternal uniparental disomy of chromosome 7.
View Article and Find Full Text PDFIdentification of a cryptic unbalanced translocation Der(22)t(12;22)(q24.33;q13.33) in a large Chinese family with Phelan-McDermid syndrome by nanopore sequencing.
Sci Rep
January 2025
Reproductive Medicine Center, Jiangxi Maternal and Child Health Hospital, 318 Bayi Avenue, Nanchang, 330006, China.
To explore the genetic cause of a four-generation severe intellectual disability in a Chinese family using nanopore sequencing and to provide genetic counseling and reproductive guidance for family members. Multiple genetic analyses of the proband and family members were performed, including chromosome karyotype analysis, whole exome sequencing, nanopore sequencing, PCR amplification, and Sanger sequencing. The results of G-binding karyotyping, CGG repeats for FMR1, GGC repeats for NOTCH2NCL, and trio-whole-exome sequencing were negative for the proband and his parents.
View Article and Find Full Text PDFOptical genome mapping to decipher the chromosomal aberrations in families seeking for preconception genetic counseling.
Sci Rep
January 2025
National Clinical Research Center for Obstetric & Gynecologic Diseases, Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
Optical genome mapping (OGM) offers high consistency in simultaneously detecting structural and copy number variants. This study aimed to retrospectively evaluate the efficacy and potential applications of OGM in preconception genetic counseling. Herein, 74 samples from 37 families were included, and their results of OGM were compared to conventional methods, namely karyotyping (KT) and chromosomal microarray analysis (CMA), which identified 27 variants across 16 positive families.
View Article and Find Full Text PDFNanopore sequencing reveals that DNA replication compartmentalisation dictates genome stability and instability in Trypanosoma brucei.
Nat Commun
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University of Glasgow Centre for Parasitology, The Wellcome Centre for Integrative Parasitology, University of Glasgow, School of Infection and Immunity, Sir Graeme Davies Building, 120 University Place, Glasgow, G12 8TA, United Kingdom.
The Trypanosoma brucei genome is structurally complex. Eleven megabase-sized chromosomes each comprise a transcribed core flanked by silent subtelomeres, housing thousands of Variant Surface Glycoprotein (VSG) genes. Additionally, hundreds of sub-megabase chromosomes contain 177 bp repeats of unknown function, and VSG transcription sites localise to many telomeres.
View Article and Find Full Text PDFThe integral role of in brain function: from neurogenesis to synaptic plasticity and social behavior.
Acta Neurobiol Exp (Wars)
January 2025
Laboratory of Animal Models, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland.
The phosphatase and tensin homolog deleted on chromosome 10 (PTEN) gene is a critical tumor suppressor that plays an essential role in the development and functionality of the central nervous system. Located on chromosome 10 in humans and chromosome 19 in mice, PTEN encodes a protein that regulates cellular processes such as division, proliferation, growth, and survival by antagonizing the PI3K‑Akt‑mTOR signaling pathway. In neurons, PTEN dephosphorylates phosphatidylinositol‑3,4,5‑trisphosphate (PIP3) to PIP2, thereby modulating key signaling cascades involved in neurogenesis, neuronal migration, and synaptic plasticity.
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