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Application of Array CGH technique for the clinical diagnosis of developmental delay and congenital malformations in Saudi Arabia

ABSTRACT: Application of Array CGH technique for the clinical diagnosis of developmental delay and congenital malformations in Saudi Arabia

PROVIDER: PRJNA754451 | ENA |

REPOSITORIES: ENA

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Application of Array CGH technique for the clinical diagnosis of developmental delay and congenital malformations in Saudi Arabia [244k]

Project description:Chromosomal imbalances are implicated in the etiology of developmental delay (DD) and congenital malformation (CM). We therefore conducted high resolution array comparative genomic hybridization (array CGH) of sixty three Saudi patients [11 by Agilent-001850/CGH1x244A and 52 by Agilent-014693/CGH2x400k] for investigating and understanding the genetic heterogeneity underlying DD/CM. A total of 76 disease associated copy number variants (CNVs) were detected in twenty four patients including 1p36, 1q21, 3p23, 6p24, 7q11, 8q24, 9q33, 10p14, 11p15, 11q12, 11q24, 13q21, 15q13, 16p13, 18q23, trisomy 18, 20q11, 21q22, 22q11.21, 47,XXY and 45,X0. The diagnosis rate of array CGH was 2.4 times higher than karyotyping.

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Application of Array CGH technique for the clinical diagnosis of developmental delay and congenital malformations in Saudi Arabia

Project description:This SuperSeries is composed of the SubSeries listed below.

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Gene expression profiling and pathway analysis of human bronchial epithelial cells exposed to airborne particulate matter collected from Saudi Arabia

Project description:Whole transcript expression was profiled using the Affymetrix 1.0 array in human bronchial epithelial cells exposed to PM collected from Saudi Arabia for 1 or 4 days. The differentially expressed genes were identified and analyzed for enriched networks and pathways using Ingenuity Pathway Analysis (IPA). We have identified 140 and 230 genes that significantly changed more than 1.5 fold after PM exposure for 1 or 4 days, respectively. IPA analysis revealed that different exposure durations triggered distinct pathways. Genes involved in NRF2-mediated response to oxidative stress were up-regulated after 1 day exposure. In contrast, cells exposed for 4 days exhibited significantly changes in genes related to cholesterol and lipid synthesis pathways.

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Identification of a transcriptomic signature of X chromosome overdosage in Saudi Klinefelter syndrome iPSCs.

Project description:Klinefelter syndrome (KS) is the most prevalent aneuploidy in males and is characterized by an extra copy of the X chromosome,while the non-mosaic form of KS with 47,XXY karyotype is the most frequent (80-90%), less common non-disjunction events during the early mitotic division of the zygote result in mosaic forms of KS (47,XXY/46,XY). Here, using a paradigmatic cohort of KS-inducible pluripotent stem cells (iPSCs) carrying 47,XXY karyotypes we present the first iPSC-based disease-modeling study performed on KS patients from Saudi Arabia. We profiled the transcriptome of these Saudi KS-iPSCs, virtually characterized by subduedcgenetic backgrounds. Moreover, we performed a comparative transcriptomic analysis to assess the aberrant gene expression profile due to X dosage imbalance in four Saudi and five European and North American 47,XXY patients-derived iPSCs from our previously published study on KS and high-grade sex chromosome aneuploidies (SCAs). We identified a transcriptomic signature including ten PAR1 genes and thirteen non-PAR escape genes consistently upregulated in KS compared to 46,XY controls in both groups, as well as 193 consistenty disregulated autosomal genes. Our results indicate that the global transcriptional impact of X chromosome overdosage in KS is largely attributable to X-linked genes escaping X inactivation, regardless of the geographical area of origin, ethnicity, and genetic background.

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