Prenatal Diagnosis: The State of the Art

A special issue of Medical Sciences (ISSN 2076-3271).

Deadline for manuscript submissions: closed (31 March 2019) | Viewed by 10068

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Medical Genetics, Department of Molecular Medicine, University of Pavia, 27100 Pavia, Italy
Interests: identification and characterization of genomic rearrangements by array-CGH and FISH analysis; miRNAs dysregulation in fibrotic lung disorders
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Special Issue Information

Dear Colleagues,

Prenatal diagnosis and prenatal screening have undergone rapid development in recent years. The inclusion of Chromosomal Microarray Analysis (CMA) in the path of prenatal diagnosis has allowed the detection, depending on the methodology used, of cryptic genomic imbalances, which were not identified by previous techniques, varying levels of mosaicism and cases of uniparental disomy (UPD). Non-invasive prenatal testing (NIPT), that analyzes cell-free fetal DNA in maternal circulation, has had an extreme rapid development and it is widely used as a screening test for the most common chromosomal disorders, showing high sensitivity and specificity for common aneuploidies (trisomies 21, 18, 13) in high-risk women. NIPT is used for diagnosis of some recessive and X-linked conditions and for just paternally inherited dominant and de novo conditions.  Its coverage is going to be expanded to detect sex chromosome aneuploidies and subchromosomal abnormalities and, in the near future, as the cost of sequencing falls and technology develops further, there may be potential for targeted sequencing, whole exome and whole genome sequencing of not invasive samples. To capture the advances in this exciting area, Medical Sciences is pleased to announce a Special Issue on Prenatal Diagnosis, planned for publication in the Fall of 2018.

Medical Sciences seeks original, as well as review articles on all aspects of Prenatal Diagnosis. The purpose of this Special Issue is to summarize the state-of-the-art in Prenatal Diagnosis, to review the techniques currently available to diagnose genetical conditions in utero, invasive and non-invasive and to collect examples of the use of next-generation sequencing (NGS) and array comparative genomic hybridization (CGH) to solve prenatal cases. A common risk after the introduction of new technologies together with the trend of unconditional enthusiasm is to overcome the diagnostic limitations, the potential false positive and the no-call rates of a new technology, and to not take in consideration that sometimes diagnostic puzzles could be solved in a simpler way with other and previous technologies. For this reason, the journal will also consider single case or few cases reports, which are difficult to publish as such, but could be interesting for this specific aspect.

The topics of interest for this Special Issue include, but are not limited to:

  • prenatal cytogenetics
  • from prenatal screening to the best testing approach
  • prenatal molecular cytogenetics, including FISH and microarray
  • prenatal molecular genetics, including whole exome sequencing
  • outcome studies of prenatally diagnosed conditions
  • non-invasive prenatal test (NIPT)
  • genetic counselling
  • preimplantation genetic testing

Dr. Elena Rossi
Guest Editor

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Keywords

  • prenatal diagnosis
  • prenatal screening
  • fetal abnormality
  • amniocentesis
  • chorion villus sampling
  • cytogenetics
  • array-CGH
  • fetal DNA
  • aneuploidy detection
  • NIPT
  • genetic counselling
  • preimplantation genetic testing
  • next generation sequencing

Related Special Issue

Published Papers (2 papers)

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Research

9 pages, 224 KiB  
Article
Chromosomal Microarray Analysis versus Karyotyping in Fetuses with Increased Nuchal Translucency
by Rita Cicatiello, Piero Pignataro, Antonella Izzo, Nunzia Mollo, Lucia Pezone, Giuseppe Maria Maruotti, Laura Sarno, Gabriella Sglavo, Anna Conti, Rita Genesio and Lucio Nitsch
Med. Sci. 2019, 7(3), 40; https://doi.org/10.3390/medsci7030040 - 27 Feb 2019
Cited by 10 | Viewed by 3876
Abstract
We have carried out a retrospective study of chromosome anomalies associated with increased nuchal translucency (NT) in order to compare yield rates of karyotype, chromosome microarray analysis (CMA), and non-invasive prenatal testing (NIPT) in this condition. Presenting with increased NT or cystic hygroma [...] Read more.
We have carried out a retrospective study of chromosome anomalies associated with increased nuchal translucency (NT) in order to compare yield rates of karyotype, chromosome microarray analysis (CMA), and non-invasive prenatal testing (NIPT) in this condition. Presenting with increased NT or cystic hygroma ≥3.5 mm as an isolated sign, 249 fetuses underwent karyotype and/or CMA from 11 to 18 gestational weeks. Karyotype and fluorescence in situ hybridization (FISH) analyses detected 103 chromosomal anomalies including 95 aneuploidies and eight chromosomal rearrangements or derivatives. Further, seven pathogenic copy number variants (CNV), five likely pathogenic CNVs, and 15 variants of unknown significance (VOUS) were detected by CMA in fetuses with normal karyotype. Genetic testing is now facing new challenges due to results with uncertain clinical impacts. Additional investigations will be necessary to interpret these findings. More than 15% of the anomalies that we have diagnosed with invasive techniques could not be detected by NIPT. It is therefore definitely not recommended in the case of ultrasound anomalies. These results, while corroborating the use of CMA in fetuses with increased NT as a second tier after rapid aneuploidy testing, do not suggest a dismissal of karyotype analysis. Full article
(This article belongs to the Special Issue Prenatal Diagnosis: The State of the Art)
12 pages, 808 KiB  
Article
Integrated FISH, Karyotyping and aCGH Analyses for Effective Prenatal Diagnosis of Common Aneuploidies and Other Cytogenomic Abnormalities
by Hongyan Chai, Autumn DiAdamo, Brittany Grommisch, Jennifer Boyle, Katherine Amato, Dongmei Wang, Jiadi Wen and Peining Li
Med. Sci. 2019, 7(2), 16; https://doi.org/10.3390/medsci7020016 - 23 Jan 2019
Cited by 7 | Viewed by 5498
Abstract
Current prenatal genetic evaluation showed a significantly increase in non-invasive screening and the reduction of invasive diagnostic procedures. To evaluate the diagnostic efficacy on detecting common aneuploidies, structural chromosomal rearrangements, and pathogenic copy number variants (pCNV), we performed a retrospective analysis on a [...] Read more.
Current prenatal genetic evaluation showed a significantly increase in non-invasive screening and the reduction of invasive diagnostic procedures. To evaluate the diagnostic efficacy on detecting common aneuploidies, structural chromosomal rearrangements, and pathogenic copy number variants (pCNV), we performed a retrospective analysis on a case series initially analyzed by aneuvysion fluorescence in situ hybridization (FISH) and karyotyping then followed by array comparative genomic hybridization (aCGH). Of the 386 cases retrieved from the past decade, common aneuploidies were detected in 137 cases (35.5%), other chromosomal structural rearrangements were detected in four cases (1%), and pCNV were detected in five cases (1.3%). The relative frequencies for common aneuploidies suggested an under detection of sex chromosome aneuploidies. Approximately 9.5% of cases with common aneuploidies showed a mosaic pattern. Inconsistent results between FISH and karyotyping were noted in cases with pseudo-mosaicism introduced by culture artifact or variable cellular proliferation from cells with mosaic karyotypic complements under in vitro cell culture. Based on findings from this case series, cell-based FISH and karyotyping should be performed to detect common aneuploidies, structural chromosomal abnormalities, and mosaic pattern. DNA-based aCGH and reflex FISH should be performed to detect and confirm genomic imbalances and pCNV. Practice points to ensure the diagnostic accuracy and efficacy were summarized. Full article
(This article belongs to the Special Issue Prenatal Diagnosis: The State of the Art)
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