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microarrays and genetics syndromes

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https://www.readbyqxmd.com/read/29146387/dilemmas-in-genetic-counseling-for-low-penetrance-neuro-susceptibility-loci-detected-on-prenatal-chromosomal-microarray-analysis
#1
Dana Brabbing-Goldstein, Adi Reches, Ran Svirsky, Anat Bar-Shira, Yuval Yaron
BACKGROUND: Chromosomal microarray analysis is standard of care in fetuses with malformations, detecting clinically significant copy number variants in 5-7% of cases over conventional karyotyping. However, it also detects variants of uncertain significance in 1.6% - 4.2% of the cases, some of which are low-penetrance neuro-susceptibility loci. The interpretation of these variants in pregnancy is particularly challenging, because the significance is often unclear and the clinical implications may be difficult to predict...
November 13, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29141989/analysis-of-copy-number-variants-on-chromosome-21-in-down-syndrome-associated-congenital-heart-defects
#2
Benjamin L Rambo-Martin, Jennifer G Mulle, David J Cutler, Lora J H Bean, Tracie C Rosser, Kenneth J Dooley, Clifford Cua, George Capone, Cheryl L Maslen, Roger H Reeves, Stephanie L Sherman, Michael E Zwick
One in five people with Down syndrome (DS) are born with an atrioventricular septal defect (AVSD), an incidence 2,000 times higher than in the euploid population. The genetic loci that contribute to this risk are poorly understood. In this study, we tested two hypotheses: 1) individuals with DS carrying chromosome 21 copy number variants (CNVs) that interrupt exons may be protected from AVSD, because these CNVs return AVSD susceptibility loci back to disomy, and 2) individuals with DS carrying chromosome 21 genes spanned by microduplications are at greater risk for AVSD because these microduplications boost the dosage of AVSD susceptibility loci beyond a tolerable threshold...
November 15, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29130988/recurrent-copy-number-variants-associated-with-syndromic-short-stature-of-unknown-cause
#3
Thais K Homma, Ana C V Krepischi, Tatiane K Furuya, Rachel S Honjo, Alexsandra C Malaquias, Debora R Bertola, Silvia S Costa, Ana P Canton, Rosimeire A Roela, Bruna L Freire, Chong A Kim, Carla Rosenberg, Alexander A L Jorge
BACKGROUND/AIMS: Genetic imbalances are responsible for many cases of short stature of unknown etiology. This study aims to identify recurrent pathogenic copy number variants (CNVs) in patients with syndromic short stature of unknown cause. METHODS: We selected 229 children with short stature and dysmorphic features, developmental delay, and/or intellectual disability, but without a recognized syndrome. All patients were evaluated by chromosomal microarray (array-based comparative genomic hybridization/single nucleotide polymorphism array)...
November 9, 2017: Hormone Research in Pædiatrics
https://www.readbyqxmd.com/read/29130599/interstitial-microdeletion-of-17q11-2-is-associated-with-hypotonia-fatigue-intellectual-disability-and-a-subtle-facial-phenotype-in-three-unrelated-patients
#4
Deborah Osio, Julia Rankin, Hannele Koillinen, Adele Reynolds, Hilde Van Esch
Over the past decade chromosomal microarray analysis (array CGH) has allowed the discovery of many novel disease-causing recurrent microdeletion and microduplication syndromes. Here we present three unrelated patients (2F; 1M) from three different countries, with developmental delay, intellectual disability, hypotonia, fatigue, and highly similar dysmorphic facial features. Shared facial features are a broad and wide forehead, similar shape of the eyes with long palpebral fissures, a bulbous tip of the nose and thick lips...
November 12, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29125674/women-s-preference-for-non-invasive-prenatal-dna-testing-nipt-versus-chromosomal-microarray-after-screening-for-down-syndrome-a-prospective-study
#5
Yvonne Kwun Yue Cheng, Wing Cheong Leung, Tak Yeung Leung, Kwong Wai Choy, Rossa Wai Kwun Chiu, Tsz-Kin Lo, Ka Yin Kwok, Daljit Singh Sahota
OBJECTIVE: To examine preference for follow-up test in women screened high or intermediate risk in 1(st) or 2(nd) trimester Down syndrome screening. DESIGN: Prospective cohort study. SETTING: Three public hospitals in Hong Kong, China. SAMPLE: Women with term high risk ≥ 1:250 (HR) or intermediate risk 1:251-1:1200 (IR). METHODS: Women screened high risk were asked to decide among 1) an invasive test plus chromosomal microarray (CMA) to obtain more detailed fetal genetic information, 2) a non-invasive cell free prenatal DNA screening (NIPT) to detect trisomies 13, 18 and 21 to avoid procedure related miscarriage, and 3) decline further testing...
November 10, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29060963/-prenatal-diagnosis-of-17q12-microdeletion-syndrome-in-fetal-renal-abnormalities
#6
Y L Jiang, Q W Qi, X Y Zhou, F F Geng, J J Bai, N Hao, J T Liu
Objectives: To analyze 3 cases of 17q12 microdeletion syndrome diagnosed prenatally, and to demonstrate clinical phenotype of the syndrome in prenatal setting. Methods: From January 2013 to July 2017, 1 370 women received invasive prenatal diagnosis and chromosome microarray analysis (CMA) in Peking Union Medical College Hospital. Among them, 3 fetuses were diagnosed as 17q12 microdeletion syndrome. All 3 cases were low-risk pregnancies. Abnormal structures in fetal kidney were found in all 3 cases, including 1 case of multiple renal cysts, 2 cases of bilateral hyperechogenic kidneys...
October 25, 2017: Zhonghua Fu Chan Ke za Zhi
https://www.readbyqxmd.com/read/29046208/-clinical-and-genetic-study-of-an-infant-with-alagille-syndrome-identification-of-a-novel-chromosomal-interstitial-deletion-including-jag1-gene
#7
Hua Li, Jia-Jia Liu, Mei Deng, Li Guo, Ying Cheng, Yuan-Zong Song
Alagille syndrome (ALGS) is an autosomal dominant disease affecting multiple systems including the liver, heart, skeleton, eyes, kidneys and face. This paper reports the clinical and genetic features of an infant with this disease. A 3-month-and-10-day-old female infant was referred to the hospital with jaundiced skin and sclera for 3 months. Physical examination revealed wide forehead and micromandible. A systolic murmur of grade 3-4/6 was heard between the 2th and 3th intercostal spaces on the left side of the sternum...
October 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29042871/application-of-array-comparative-genomic-hybridization-in-korean-children-under-6-years-old-with-global-developmental-delay
#8
Kyung Yeon Lee, Eunsim Shin
PURPOSE: Recent advancements in molecular techniques have greatly contributed to the discovery of genetic causes of unexplained developmental delay. Here, we describe the results of array comparative genomic hybridization (CGH) and the clinical features of 27 patients with global developmental delay. METHODS: We included 27 children who fulfilled the following criteria: Korean children under 6 years with global developmental delay; children who had at least one or more physical or neurological problem other than global developmental delay; and patients in whom both array CGH and G-banded karyotyping tests were performed...
September 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/29032050/positive-predictive-value-estimates-for-cell-free-noninvasive-prenatal-screening-from-data-of-a-large-referral-genetic-diagnostic-laboratory
#9
Andrea K Petersen, Sau Wai Cheung, Janice L Smith, Weimin Bi, Patricia A Ward, Sandra Peacock, Alicia Braxton, Ignatia B Van Den Veyver, Amy M Breman
BACKGROUND: Since its debut in 2011, cell-free fetal DNA screening has undergone rapid expansion with respect to both utilization and coverage. However, conclusive data regarding the clinical validity and utility of this screening tool, both for the originally included common autosomal and sex-chromosomal aneuploidies as well as the more recently added chromosomal microdeletion syndromes, have lagged behind. Thus, there is a continued need to educate clinicians and patients about the current benefits and limitations of this screening tool to inform pre- and posttest counseling, pre/perinatal decision making, and medical risk assessment/management...
October 13, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28984907/prader-willi-syndrome-genetic-subtypes-and-clinical-neuropsychiatric-diagnoses-in-residential-care-adults
#10
Ann M Manzardo, Nicolette Weisensel, Sheryl Ayala, Waheeda Hossain, Merlin G Butler
The historical diagnosis of Prader-Willi syndrome (PWS), a complex genetic disorder, in adults by clinical presentation rather than genetic testing has limited genetic subtype-specific psychometric investigations and treatment. Genetic testing and clinical psychiatric evaluation using DSM-IV-TR criteria were undertaken on 72 adult residents (34M; 38F) from the Prader-Willi Homes of Oconomowoc (PWHO), a specialty PWS group home system. Methylation specific-multiplex ligation probe amplification and high-resolution microarrays were analyzed for methylation status, 15q11-q13 deletions and maternal uniparental disomy 15 (mUPD15)...
October 6, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28981940/-prenatal-genetic-analysis-of-a-fetus-with-wolf-hirschhorn-syndrome-and-edward-syndrome
#11
Xueping Shen, Pingya He, Rong Fang, Juan Yao, Wenwen Li
OBJECTIVE: To screen for genomic copy number variants (CNVs) in a fetus with cardiac abnormalities and intrauterine growth retardation through single nucleotide polymorphism microarray (SNP array) and karyotyping analysis. METHODS: The fetus and its parents were subjected to conventional G banding and SNP-array analysis. The results were confirmed with fluorescence in situ hybridization (FISH). RESULTS: G-banding analysis showed that the fetus has a karyotype of 47,XX,+mar...
October 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28981937/-application-of-chromosomal-microarray-analysis-for-fetuses-with-ventricular-septal-defects
#12
Qiong Deng, Fang Fu, Ru Li, Xiangyi Jing, Tingying Lei, Xin Yang, Min Pan, Li Zhen, Jin Han, Can Liao
OBJECTIVE: To explore the genetic etiology of fetuses with ventricular septal defects (VSD) using chromosomal microarray analysis (CMA). METHODS: A total of 248 fetuses were divided into isolated VSD group, VSD with other cardiac and/or great vessels malformation group, VSD with extra-cardiac anomalies group (including malformation and sonographic soft markers), and VSD with both cardiac and extra-cardiac anomalies group. Standard karyotyping was carried out for all fetuses, and CMA was performed for 6 fetuses with an abnormal karyotype and a proportion of fetuses with a normal karyotype...
October 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28981929/-genetic-analysis-of-two-cases-with-dandy-walker-deformed-fetus
#13
Juan Yao, Rong Fang, Xueping Shen, Guosong Shen, Su Zhang
OBJECTIVE: To explore the genetic etiology of two fetuses with Dandy-Walker malformation using single nucleotide polymorphism microarray (SNP-array). METHODS: The fetuses and their parents were subjected to G banding karyotype analysis. The fetuses were also subjected to SNP-array analysis. RESULTS: The parents of both fetuses showed a normal karyotype. One fetus has a 46,X,?i(X)(q10), while for another conventional cell culture has failed...
October 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28969878/epilepsy-in-22q11-2-deletion-syndrome-a-case-series-and-literature-review
#14
Basanagoud Mudigoudar, Sunitha Nune, Stephen Fulton, Ehab Dayyat, James W Wheless
BACKGROUND: The 22q11.2 deletion syndrome affects multiple organ systems, and the neurological manifestations are an important aspect of this disorder. Many are aware of cardiac anomalies associated with this uncommon genetic disorder. However, the different types of seizures, electroencephalography (EEG), and brain magnetic resonance imaging (MRI) findings seen in this condition are not appreciated. METHODS: Medical records of four patients with epilepsy due to 22q11...
August 26, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28962153/turner-syndrome-caused-by-rare-complex-structural-abnormalities-involving-chromosome-x
#15
Niu Li, Li Zhao, Juan Li, Yu Ding, Yongnian Shen, Xiaodong Huang, Xiumin Wang, Jian Wang
Turner syndrome (TS) is a phenotypic heterogeneous genetic disorder caused by the loss of an X-chromosome or X-structural abnormalities in the X-chromosome, and affects approximately 1 in every 2,500 females. The affected individuals may develop diverse clinical features, including short stature, ovarian dysgenesis, skeletal dysplasia, facial abnormalities and other disorders. A constitutional karyotype of 45, X accounts for nearly 50% of TS patients, while X-mosaicism and other X-chromosomal structural abnormalities, including deletions, duplications, ring, isodicentric chromosomes, inversions and translocations, have been reported in other cases...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28937892/the-effect-of-mmp-13-mmp-12-and-ambn-on-gingival-enlargement-and-root-deformation-in-a-new-type-of-gingival-fibromatosis
#16
Chung-Min Kang, Jae-Ho Lee, Mijeong Jeon, Je Seon Song, Seong-Oh Kim
This case compared gene-expression between a new type of idiopathic gingival fibromatosis (IGF) and normal gingiva, to clarify the nature of the gingival overgrowth and dental anomaly. A 6-year-old girl with generalized gingival overgrowth and root deformations was diagnosed with IGF. Gene expression profiles were compared between normal gingiva (N=9) and one IGF gingiva using cDNA microarray. Genes related to regulation of cell proliferation and proteolytic degradation were expressed strongly in IGF. MMP-13 and MMP-12 expression were 120 times and 96 times lower in IGF, respectively, whereas AMBN expression was 79 times higher...
September 22, 2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28934431/genetic-profiling-and-comorbidities-of-zika-infection
#17
Mohammad Ali Moni, Pietro Lio'
Background: The difficulty in distinguishing infection by Zika virus (ZIKV) from other flaviviruses is a global health concern, particularly given the high risk of neurologic complications (including Guillain-Barré syndrome [GBS]) with ZIKV infection. Methods: We developed quantitative frameworks to compare and explore infectome, diseasome, and comorbidity of ZIKV infections. We analyzed gene expression microarray and RNA-Seq data from ZIKV, West Nile fever (WNF), chikungunya, dengue, yellow fever, Japanese encephalitis virus, GBS, and control datasets...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28922055/nance-horan-syndrome-in-females-due-to-a-balanced-x-1-translocation-that-disrupts-the-nhs-gene-familial-case-report-and-review-of-the-literature
#18
Laura Gómez-Laguna, Alejandro Martínez-Herrera, Alejandra Del Pilar Reyes-de la Rosa, Constanza García-Delgado, Karem Nieto-Martínez, Fernando Fernández-Ramírez, Tania Yanet Valderrama-Atayupanqui, Ariadna Berenice Morales-Jiménez, Judith Villa-Morales, Susana Kofman, Alicia Cervantes, Verónica Fabiola Morán-Barroso
The Nance-Horan syndrome is an X-linked disorder characterized by congenital cataract, facial features, microcornea, microphthalmia, and dental anomalies; most of the cases are due to NHS gene mutations on Xp22.13. Heterozygous carrier females generally present less severe features, and up to 30% of the affected males have intellectual disability. We describe two patients, mother and daughter, manifesting Nance-Horan syndrome. The cytogenetic and molecular analyses demonstrated a 46,X,t(X;1)(p22.13;q22) karyotype in each of them...
September 18, 2017: Ophthalmic Genetics
https://www.readbyqxmd.com/read/28914717/the-relationship-between-mismatch-repair-deficiency-and-pd-l1-expression-in-breast-carcinoma
#19
Anne M Mills, Erik A Dill, Christopher A Moskaluk, Jaroslaw Dziegielewski, Tim N Bullock, Patrick M Dillon
Mismatch repair (MMR) deficiency in solid tumors has recently been linked to susceptibility to immunotherapies targeting the programmed cell death-1 (PD-1)/programmed cell death-1 ligand (PD-L1) axis. Loss of MMR proteins has been shown to correlate with tumoral PD-L1 expression in colorectal and endometrial carcinomas, but the association between expression of MMR proteins and PD-L1 has not previously been studied in breast carcinoma, where MMR deficiency is less common. We assessed the relationship between PD-L1 and MMR protein expression by immunohistochemistry in 245 primary and 40 metastatic breast carcinomas...
September 13, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28913408/hepatocyte-specific-deletion-of-mouse-lamin-a-c-leads-to-male-selective-steatohepatitis
#20
Raymond Kwan, Graham F Brady, Maria Brzozowski, Sujith V Weerasinghe, Hope Martin, Min-Jung Park, Makayla J Brunt, Ram K Menon, Xin Tong, Lei Yin, Colin L Stewart, M Bishr Omary
BACKGROUND & AIMS: Lamins are nuclear intermediate filament proteins that comprise the major components of the nuclear lamina. Mutations in LMNA, which encodes lamins A/C, cause laminopathies, including lipodystrophy, cardiomyopathy, and premature aging syndromes. However, the role of lamins in the liver is unknown, and it is unclear whether laminopathy-associated liver disease is caused by primary hepatocyte defects or systemic alterations. METHODS: To address these questions, we generated mice carrying a hepatocyte-specific deletion of Lmna (knockout [KO] mice) and characterized the KO liver and primary hepatocyte phenotypes by immunoblotting, immunohistochemistry, microarray analysis, quantitative real-time polymerase chain reaction, and Oil Red O and Picrosirius red staining...
November 2017: Cellular and Molecular Gastroenterology and Hepatology
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