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"Trisomy 21"

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https://www.readbyqxmd.com/read/28809761/the-t-12-21-p13-q22-in-pediatric-b-acute-lymphoblastic-leukemia-an-update
#1
Maximilian Becker, Kristie Liu, Carlos A Tirado
Pediatric B-cell acute lymphoblastic leukemia (B-ALL) is the most common hematological malignancy in children, and the t(12;21)(p13;q22) occurs in approximately 25% of these cases, making it is the most prevalent chromosomal abnormality. The t(12;21) which disrupts hematopoietic differentiation and proliferation, and can be present as a sole abnormality or within the context of a complex karyotype characterized by three or more chromosomal abnormalities. The prognosis of t(12;21) within a complex karyotype is extensively debated...
2017: Journal of the Association of Genetic Technologists
https://www.readbyqxmd.com/read/28804563/count-based-size-correction-analysis-of-maternal-plasma-dna-for-improved-noninvasive-prenatal-detection-of-fetal-trisomies-13-18-and-21
#2
Li Zhang, Qian Zhu, He Wang, Shanling Liu
PURPOSE: Our goal was to derive more sensitive and accurate Z-scores based on combined DNA count- and size-based algorithms to advance molecular diagnostics for noninvasive prenatal testing of fetal trisomies. METHODS: We included 180 cases at high risk for fetal aneuploidy who underwent amniotic fluid cytogenetic analysis. We calculated their traditional count-based Z-scores, as well as their 100-, 130- and 150-, and 166-bp size-corrected Z-scores, and determined each Z-score's reliability based on its comparison to the cases' cytogenetic results...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28797153/-chorionic-villus-cell-culture-and-karyotype-analysis-in-1-983-cases-of-spontaneous-miscarriage
#3
S M Yuan, C Liao, D Z Li, J Z Huang, S Y Hu, M Ke, H Z Zhong, C X Yi
Objective: To investigate the relationship between spontaneous miscarriage and embryonic chromosome abnormalities, and to evaluate the clinical application of karyotype analysis by chorionic villus cell culture. Methods: The chorionic villus karyotype of 1 983 cases of miscarriage from January 2010 to July 2016 in Guangzhou Women and Children's Mecical Center were analyzed retrospectively. The miscarried chorionic villi were obtained by curettage under sterilized condition. The chromosome specimens were prepared after chorionic villus cell culture...
July 25, 2017: Zhonghua Fu Chan Ke za Zhi
https://www.readbyqxmd.com/read/28781828/why-could-a-woman-have-three-trisomy-21-pregnancies-a-case-report
#4
Magda Magalhães, Cecília Marques, Fabiana Ramos, Ana Jardim, Sofia Franco, Filomena Coelho, Isabel Carreira, Paulo Moura
Mosaicism, an important cause for recurrent T21, should be suspected in families with more than one affected child wishing to receive prenatal counseling. Fluorescence in-situ hybridization analysis in a large number of cells and in different tissue samples is critical for detecting low-level mosaicism and is a key prognostic factor.
August 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/28777858/-clinical-features-and-prognosis-of-acute-myeloid-leukemia-with-acquired-trisomy-21
#5
Ying Lu, Jiaojiao Yuan, Huafeng Wang, Renzhi Pei, Zhimei Chen, Jie Jin
OBJECTIVE: To delineate the clinical features and prognostic significance of acquired trisomy 21 (+21) in 31 patients with acute myeloid leukemia (AML). METHODS: Chromosome specimen was prepared from bone marrow samples using a direct method and (or) cultivation, and their karyotypes were analyzed with R banding. The clinical features, chemotherapeutic effect and survival status of patients with acquired +21 were evaluated. RESULTS: Cytogenetic studies were successfully performed on 3 329 patients with newly diagnosed AML, among which 31 (0...
August 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28777855/-application-of-bacs-on-beads-and-karyotyping-for-the-prenatal-diagnosis-of-1371-pregnant-women-with-a-high-risk
#6
Penglong Chen, Chunlei Jin, Qunda Shan, Bixia Qian, Xiaohong Zheng, Xiaohong Wang, Yi Wang
OBJECTIVE: To assess the value of combined BACs-on-Beads(TM) (BoBs) and chromosomal karyotyping for the diagnosis of women with high-risk pregnancy. METHODS: For 1371 women with singleton pregnancy and various indications for prenatal diagnosis, karyotyping and BoBs were simultaneously applied on their amnionic fluid samples. RESULTS: In total 23 cases of trisomy 21, 11 cases of trisomy 18, 5 cases of sex chromosome aneuploidies, 6 cases of microdeletions/microduplications, 2 cases of chimeric chromosomes and 1 case of structural chromosomal abnormality were detected by the BoBs assay, among which the 6 microdeletions/microduplications were not detected by karyotyping...
August 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28771606/normative-weight-adjusted-models-for-the-median-levels-of-first-trimester-serum-biomarkers-for-trisomy-21-screening-in-a-specific-ethnicity
#7
Ounjai Kor-Anantakul, Thitima Suntharasaj, Chitkasaem Suwanrath, Tharangrut Hanprasertpong, Savitree Pranpanus, Ninlapa Pruksanusak, Suthiraporn Janwadee, Alan Geater
OBJECTIVE: To establish normative weight-adjusted models for the median levels of first trimester serum biomarkers for trisomy 21 screening in southern Thai women, and to compare these reference levels with Caucasian-specific and northern Thai models. METHODS: A cross-sectional study was conducted in 1,150 normal singleton pregnancy women to determine serum pregnancy-associated plasma protein-A (PAPP-A) and free β-human chorionic gonadotropin (β-hCG) concentrations in women from southern Thailand...
2017: PloS One
https://www.readbyqxmd.com/read/28764586/retrospective-analysis-of-4761-cases-who-underwent-amniocentesis-in-southeast-china
#8
Hehua Tao, Jianping Xiao, Canfeng Yang, Jun Wang, Ye Tang, Caiqin Guo, Junfeng Wang
The aim of this study was to examine the clinical and cytogenetic results of 4761 amniocentesis (AS) cases retrospectively in our clinic in southeast China. The prenatal diagnosis indications, detected chromosomal anomalies and the detection rate of chromosomal abnormalities were studied in 4761 patients who underwent AS between June 2014 and July 2016 retrospectively. Chromosomal abnormality was detected in 137 (2.88%) of the 4761 samples (89.1% numerical, 10.9% structural). The most frequent numerical chromosomal abnormality was trisomy 21 (59...
August 1, 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28749784/concentrations-of-leptin-adiponectin-and-other-metabolic-parameters-in-non-obese-children-with-down-syndrome
#9
Nikhil Tenneti, Devi Dayal, Sheetal Sharda, Inusha Panigrahi, Mohammed Didi, Savita Verma Attri, Naresh Sachdeva, Anil Kumar Bhalla
BACKGROUND: Recent data indicates that adults with Down syndrome (DS) are at increased risk for cardiovascular disease (CVD) that significantly contributes to their morbidity and mortality. Although identification of cardiometabolic risk factors during childhood is desirable to design preventive interventions, the data on such risk factors in children with DS is scarce. The aim of this study was to study the cardiometabolic risk factors such as insulin resistance (IR), leptin and adiponectin concentrations, lipid abnormalities and leptin resistance in non-obese children with DS...
August 28, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28749033/co-occurring-down-syndrome-and-sucla2-related-mitochondrial-depletion-syndrome
#10
Natario L Couser, Daniel S Marchuk, Laurie D Smith, Alexandra Arreola, Kathleen A Kaiser-Rogers, Joseph Muenzer, Arti Pandya, Muge Gucsavas-Calikoglu, Cynthia M Powell
Mitochondrial DNA depletion syndrome 5 (MIM 612073) is a rare autosomal recessive disorder caused by homozygous or compound heterozygous pathogenic variants in the beta subunit of the succinate-CoA ligase gene located within the 13q14 band. We describe two siblings of Hispanic descent with SUCLA2-related mitochondrial depletion syndrome (encephalomyopathic form with methylmalonic aciduria); the older sibling is additionally affected with trisomy 21. SUCLA2 sequencing identified homozygous p.Arg284Cys pathogenic variants in both patients...
July 27, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28736822/congenital-heart-disease-and-cardiac-procedural-outcomes-in-patients-with-trisomy-21-and-turner-syndrome
#11
Raysa Morales-Demori
Congenital heart disease (CHD) is present in approximately 50% of patients with trisomy 21 (T21) and Turner syndrome (TS). According to the American Academy of Pediatrics, every patient with these genetic disorders should have a postnatal echocardiogram. T21 is usually associated with atrioventricular (30%-60%), atrial (16%-21%), or ventricular septal defects (14%-27%). TS is usually associated with left-sided heart disease. However, the spectrum of CHD in these genetic disorders is wider than those mentioned lesions...
July 24, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28733957/a-review-of-biomarkers-for-alzheimer-s-disease-in-down-syndrome
#12
REVIEW
Ni-Chung Lee, Yin-Hsiu Chien, Wuh-Liang Hwu
Down syndrome (Trisomy 21; DS) is a unique disease known to be associated with early-onset Alzheimer's disease (AD). The initial presentation of AD in DS is usually difficult to recognize, owing to the underlying intellectual disabilities. Using biomarkers as a prediction tool for detecting AD in at-risk people with DS may benefit patient care. The objective of this review is to discuss the utility of biomarkers in DS on the basis of the pathophysiology of the disease and to provide an update on recent studies in this field...
July 2017: Neurology and Therapy
https://www.readbyqxmd.com/read/28728213/performance-of-non-invasive-prenatal-screening-for-fetal-aneuploidy-in-twin-pregnancies-a-meta-analysis
#13
Hong Liao, Shanling Liu, He Wang
OBJECTIVE: The objective of this study was to review the published studies of non-invasive prenatal screening (NIPS) in twin pregnancies and to evaluate the performance for screening fetal trisomies 21, 18, and 13 in twin pregnancies. METHOD: Ten eligible studies were included in this meta-analysis. Data analysis, heterogeneity exploring, meta-regression and subgroup analysis were all conducted with Meta-DiSc 1.4. Quality assessments were carried out with the Quality Assessment Tool for Diagnostic Accuracy Studies (QUADAS-2)...
July 20, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28723764/increased-nuchal-translucency-in-fetuses-with-a-normal-karyotype-diagnosis-and-management-an-observational-study
#14
Demetra Socolov, Razvan Socolov, Vlad Eusebiu Gorduza, Tudor Butureanu, Ruxandra Stanculescu, Alexandru Carauleanu, Ioana Pavaleanu
The use of nuchal translucency (NT) in 1992 by Nicolaides et al was a major breakthrough in screening for chromosomal aneuploidies at the end of the first trimester. However, pathological conditions other than chromosomal aneuploidies are also associated with increased NT, which can also be detected in normal fetuses. This study sought to evaluate the causes of this ultrasound sign in a group of patients from Iasi, Romania.During the decade-long study period, there were 71 certified cases involving increased NT; the patients in these cases underwent diagnostic amniocentesis and karyotyping...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28717969/decreasing-the-expression-of-gabaa-%C3%AE-5-subunit-containing-receptors-partially-improves-cognitive-electrophysiological-and-morphological-hippocampal-defects-in-the-ts65dn-model-of-down-syndrome
#15
Verónica Vidal, Susana García-Cerro, Paula Martínez, Andrea Corrales, Sara Lantigua, Rebeca Vidal, Noemí Rueda, Laurence Ozmen, Maria-Clemencia Hernández, Carmen Martínez-Cué
Trisomy 21 or Down syndrome (DS) is the most common cause of intellectual disability of a genetic origin. The Ts65Dn (TS) mouse, which is the most commonly used and best-characterized mouse model of DS, displays many of the cognitive, neuromorphological, and biochemical anomalies that are found in the human condition. One of the mechanisms that have been proposed to be responsible for the cognitive deficits in this mouse model is impaired GABA-mediated inhibition. Because of the well-known modulatory role of GABAA α5 subunit-containing receptors in cognitive processes, these receptors are considered to be potential targets for improving the intellectual disability in DS...
July 17, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28717645/whole-genome-amplification-of-day-3-or-day-5-human-embryos-biopsies-provides-a-suitable-dna-template-for-pcr-based-techniques-for-genotyping-a-complement-of-preimplantation-genetic-testing
#16
Elizabeth Schaeffer, Bruno López-Bayghen, Adina Neumann, Leonardo M Porchia, Rafael Camacho, Efraín Garrido, Rocío Gómez, Felipe Camargo, Esther López-Bayghen
Our objective was to determine if whole genome amplification (WGA) provides suitable DNA for qPCR-based genotyping for human embryos. Single blastomeres (Day 3) or trophoblastic cells (Day 5) were isolated from 342 embryos for WGA. Comparative Genomic Hybridization determined embryo sex as well as Trisomy 18 or Trisomy 21. To determine the embryo's sex, qPCR melting curve analysis for SRY and DYS14 was used. Logistic regression indicated a 4.4%, 57.1%, or 98.8% probability of a male embryo when neither gene, SRY only, or both genes were detected, respectively (accuracy = 94...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28707139/patients-knowledge-of-prenatal-screening-for-trisomy-21
#17
Michal Sheinis, Kira Bensimon, Amanda Selk
This study's objective was to assess the knowledge of prenatal screening for Trisomy 21 in pregnant women in one institution in Canada. A cross-sectional survey measuring demographics, knowledge of screening, and health literacy, was administered to pregnant women. Of the 135 women who completed the survey, 74% had adequate knowledge of Trisomy 21 and associated screening procedures. Twenty-eight point one percent of women did not receive any counseling. Overall, 29.5% of women did not know that the screening test was optional and 10...
July 14, 2017: Journal of Genetic Counseling
https://www.readbyqxmd.com/read/28702698/principles-of-first-trimester-screening-in-the-age-of-non-invasive-prenatal-diagnosis-screening-for-chromosomal-abnormalities
#18
REVIEW
Karl Oliver Kagan, Jiri Sonek, Philipp Wagner, Markus Hoopmann
PURPOSE: First trimester risk assessment for chromosomal abnormalities plays a major role in the contemporary pregnancy care. It has evolved significantly since its introduction in the 1990s, when it essentially consisted of just the nuchal translucency measurement. Today, it involves the measurement of several biophysical and biochemical markers and it is often combined with a cell-free DNA (cfDNA) analysis as a secondary test. METHODS: A search of the Medline and Embase databases was done looking for articles about first trimester aneuploidy screening...
July 12, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28702511/variation-in-the-zinc-finger-of-prdm9-is-associated-with-the-absence-of-recombination-along-nondisjoined-chromosomes-21-of-maternal-origin
#19
Tiffany Renee Oliver, Candace Middlebrooks, Ariel Harden, Nyeisha Scott, Blair Johnson, Jillian Jones, Christin Walker, Corinthia Wilkerson, Sha-Hanna Saffold, Abisola Akinseye, Tunde Smith, Eleanor Feingold, Stephanie L Sherman
Variation in the zinc finger-binding domain (ZFBD) of the protein PR Domain-Containing Protein 9 (PRDM9) is associated with altered placement of recombination in the human genome. As both the absence and altered placement of recombination are observed among chromosomes 21 that nondisjoin, we genotyped the PRDM9 ZFBD among mothers of children with Trisomy 21 in efforts to determine if variation within this region is associated with the recombination-related risk for chromosome 21 nondisjunction (NDJ). In our approach, PCR was used to amplify the ZFBD of PRDM9 and products were then subjected to bi-directional Sanger sequencing...
December 2016: J Down Syndr Chromosom Abnorm
https://www.readbyqxmd.com/read/28695546/knockdown-of-myo-inositol-transporter-smit1-normalizes-cholinergic-and-glutamatergic-function-in-an-immortalized-cell-line-established-from-the-cerebral-cortex-of-a-trisomy-16-fetal-mouse-an-animal-model-of-human-trisomy-21-down-syndrome
#20
Ana María Cárdenas, Paola Fernández-Olivares, Ignacio Díaz-Franulic, Arlek M González-Jamett, Takeshi Shimahara, Juan Segura-Aguilar, Raúl Caviedes, Pablo Caviedes
The Na(+)/myo-inositol cotransporter (SMIT1) is overexpressed in human Down syndrome (DS) and in trisomy 16 fetal mice (Ts16), an animal model of the human condition. SMIT1 overexpression determines increased levels of intracellular myo-inositol, a precursor of phophoinositide synthesis. SMIT1 is overexpressed in CTb cells, an immortalized cell line established from the cerebral cortex of a Ts16 mouse fetus. CTb cells exhibit impaired cytosolic Ca(2+) signals in response to glutamatergic and cholinergic stimuli (increased amplitude and delayed time-dependent kinetics in the decay post-stimulation), compared to our CNh cell line, derived from the cerebral cortex of a euploid animal...
July 10, 2017: Neurotoxicity Research
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