Targeted next-generation sequencing analysis in couples at increased risk for autosomal recessive disorders

K. Komlósi, Stefan Diederich, Desiree Lucia Fend-Guella, Oliver Bartsch, Jennifer Winter, Ulrich Zechner, Michael Beck, Peter Meyer, Susann Schweiger

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Background: Many of the genetic childhood disorders leading to death in the pre- or neonatal period or during early childhood follow autosomal recessive modes of inheritance and bear specific challenges for genetic counseling and prenatal diagnostics. Parents are carriers but clinically unaffected, and diseases are rare but have recurrence risks of 25% in the same family. Often, affected children (or fetuses) die before a genetic diagnosis can be established, post-mortem analysis and phenotypic descriptions are insufficient and DNA from affected fetuses or children is not available for later analysis. A genetic diagnosis showing biallelic causative mutations is, however, the requirement for targeted carrier testing in parents and prenatal and preimplantation genetic diagnosis in further pregnancies. Methods: We undertook targeted next-generation sequencing (NGS) for carrier screening of autosomal recessive lethal disorders in 8 consanguineous and 5 non-consanguineous couples with one or more affected children. We searched for heterozygous variants (non-synonymous coding or splice variants) in parents' DNA, using a set of 430 genes known to be causative for rare autosomal recessive diseases with poor prognosis, and then filtering for variants present in genes overlapping in both partners. Putative pathogenic variants were tested for cosegregation in affected fetuses or children where material was available. Results: The diagnosis for the premature death in children was established in 5 of the 13 couples. Out of the 8 couples in which no causative diagnosis could be established 4 consented to undergo further analysis, in two of those a potentially causative variant in a novel candidate gene was identified. Conclusions: For the families in whom causative variants could be identified, these may now be used for prenatal and preimplantation genetic diagnostics. Our data show that NGS based gene panel sequencing of selected genes involved in lethal autosomal recessive disorders is an effective tool for carrier screening in parents and for the identification of recessive gene defects and offers the possibility of prenatal and preimplantation genetic diagnosis in further pregnancies in families that have experienced deaths in early childhood and /or multiple abortions.

Original languageEnglish
Article number23
JournalOrphanet Journal of Rare Diseases
Volume13
Issue number1
DOIs
Publication statusPublished - Jan 26 2018

Fingerprint

Parents
Preimplantation Diagnosis
Fetus
Genes
Overlapping Genes
Recessive Genes
Pregnancy
Inborn Genetic Diseases
Premature Mortality
DNA
Genetic Counseling
Rare Diseases
Recurrence
Mutation

Keywords

  • autosomal recessive
  • carrier screening
  • consanguineous
  • next generation sequencing
  • panel diagnostics

ASJC Scopus subject areas

  • Genetics(clinical)
  • Pharmacology (medical)

Cite this

Targeted next-generation sequencing analysis in couples at increased risk for autosomal recessive disorders. / Komlósi, K.; Diederich, Stefan; Fend-Guella, Desiree Lucia; Bartsch, Oliver; Winter, Jennifer; Zechner, Ulrich; Beck, Michael; Meyer, Peter; Schweiger, Susann.

In: Orphanet Journal of Rare Diseases, Vol. 13, No. 1, 23, 26.01.2018.

Research output: Contribution to journalArticle

Komlósi, K, Diederich, S, Fend-Guella, DL, Bartsch, O, Winter, J, Zechner, U, Beck, M, Meyer, P & Schweiger, S 2018, 'Targeted next-generation sequencing analysis in couples at increased risk for autosomal recessive disorders', Orphanet Journal of Rare Diseases, vol. 13, no. 1, 23. https://doi.org/10.1186/s13023-018-0763-0
Komlósi, K. ; Diederich, Stefan ; Fend-Guella, Desiree Lucia ; Bartsch, Oliver ; Winter, Jennifer ; Zechner, Ulrich ; Beck, Michael ; Meyer, Peter ; Schweiger, Susann. / Targeted next-generation sequencing analysis in couples at increased risk for autosomal recessive disorders. In: Orphanet Journal of Rare Diseases. 2018 ; Vol. 13, No. 1.
@article{061b732c21d14229a4fe49a7622c4564,
title = "Targeted next-generation sequencing analysis in couples at increased risk for autosomal recessive disorders",
abstract = "Background: Many of the genetic childhood disorders leading to death in the pre- or neonatal period or during early childhood follow autosomal recessive modes of inheritance and bear specific challenges for genetic counseling and prenatal diagnostics. Parents are carriers but clinically unaffected, and diseases are rare but have recurrence risks of 25{\%} in the same family. Often, affected children (or fetuses) die before a genetic diagnosis can be established, post-mortem analysis and phenotypic descriptions are insufficient and DNA from affected fetuses or children is not available for later analysis. A genetic diagnosis showing biallelic causative mutations is, however, the requirement for targeted carrier testing in parents and prenatal and preimplantation genetic diagnosis in further pregnancies. Methods: We undertook targeted next-generation sequencing (NGS) for carrier screening of autosomal recessive lethal disorders in 8 consanguineous and 5 non-consanguineous couples with one or more affected children. We searched for heterozygous variants (non-synonymous coding or splice variants) in parents' DNA, using a set of 430 genes known to be causative for rare autosomal recessive diseases with poor prognosis, and then filtering for variants present in genes overlapping in both partners. Putative pathogenic variants were tested for cosegregation in affected fetuses or children where material was available. Results: The diagnosis for the premature death in children was established in 5 of the 13 couples. Out of the 8 couples in which no causative diagnosis could be established 4 consented to undergo further analysis, in two of those a potentially causative variant in a novel candidate gene was identified. Conclusions: For the families in whom causative variants could be identified, these may now be used for prenatal and preimplantation genetic diagnostics. Our data show that NGS based gene panel sequencing of selected genes involved in lethal autosomal recessive disorders is an effective tool for carrier screening in parents and for the identification of recessive gene defects and offers the possibility of prenatal and preimplantation genetic diagnosis in further pregnancies in families that have experienced deaths in early childhood and /or multiple abortions.",
keywords = "autosomal recessive, carrier screening, consanguineous, next generation sequencing, panel diagnostics",
author = "K. Koml{\'o}si and Stefan Diederich and Fend-Guella, {Desiree Lucia} and Oliver Bartsch and Jennifer Winter and Ulrich Zechner and Michael Beck and Peter Meyer and Susann Schweiger",
year = "2018",
month = "1",
day = "26",
doi = "10.1186/s13023-018-0763-0",
language = "English",
volume = "13",
journal = "Orphanet Journal of Rare Diseases",
issn = "1750-1172",
publisher = "BioMed Central",
number = "1",

}

TY - JOUR

T1 - Targeted next-generation sequencing analysis in couples at increased risk for autosomal recessive disorders

AU - Komlósi, K.

AU - Diederich, Stefan

AU - Fend-Guella, Desiree Lucia

AU - Bartsch, Oliver

AU - Winter, Jennifer

AU - Zechner, Ulrich

AU - Beck, Michael

AU - Meyer, Peter

AU - Schweiger, Susann

PY - 2018/1/26

Y1 - 2018/1/26

N2 - Background: Many of the genetic childhood disorders leading to death in the pre- or neonatal period or during early childhood follow autosomal recessive modes of inheritance and bear specific challenges for genetic counseling and prenatal diagnostics. Parents are carriers but clinically unaffected, and diseases are rare but have recurrence risks of 25% in the same family. Often, affected children (or fetuses) die before a genetic diagnosis can be established, post-mortem analysis and phenotypic descriptions are insufficient and DNA from affected fetuses or children is not available for later analysis. A genetic diagnosis showing biallelic causative mutations is, however, the requirement for targeted carrier testing in parents and prenatal and preimplantation genetic diagnosis in further pregnancies. Methods: We undertook targeted next-generation sequencing (NGS) for carrier screening of autosomal recessive lethal disorders in 8 consanguineous and 5 non-consanguineous couples with one or more affected children. We searched for heterozygous variants (non-synonymous coding or splice variants) in parents' DNA, using a set of 430 genes known to be causative for rare autosomal recessive diseases with poor prognosis, and then filtering for variants present in genes overlapping in both partners. Putative pathogenic variants were tested for cosegregation in affected fetuses or children where material was available. Results: The diagnosis for the premature death in children was established in 5 of the 13 couples. Out of the 8 couples in which no causative diagnosis could be established 4 consented to undergo further analysis, in two of those a potentially causative variant in a novel candidate gene was identified. Conclusions: For the families in whom causative variants could be identified, these may now be used for prenatal and preimplantation genetic diagnostics. Our data show that NGS based gene panel sequencing of selected genes involved in lethal autosomal recessive disorders is an effective tool for carrier screening in parents and for the identification of recessive gene defects and offers the possibility of prenatal and preimplantation genetic diagnosis in further pregnancies in families that have experienced deaths in early childhood and /or multiple abortions.

AB - Background: Many of the genetic childhood disorders leading to death in the pre- or neonatal period or during early childhood follow autosomal recessive modes of inheritance and bear specific challenges for genetic counseling and prenatal diagnostics. Parents are carriers but clinically unaffected, and diseases are rare but have recurrence risks of 25% in the same family. Often, affected children (or fetuses) die before a genetic diagnosis can be established, post-mortem analysis and phenotypic descriptions are insufficient and DNA from affected fetuses or children is not available for later analysis. A genetic diagnosis showing biallelic causative mutations is, however, the requirement for targeted carrier testing in parents and prenatal and preimplantation genetic diagnosis in further pregnancies. Methods: We undertook targeted next-generation sequencing (NGS) for carrier screening of autosomal recessive lethal disorders in 8 consanguineous and 5 non-consanguineous couples with one or more affected children. We searched for heterozygous variants (non-synonymous coding or splice variants) in parents' DNA, using a set of 430 genes known to be causative for rare autosomal recessive diseases with poor prognosis, and then filtering for variants present in genes overlapping in both partners. Putative pathogenic variants were tested for cosegregation in affected fetuses or children where material was available. Results: The diagnosis for the premature death in children was established in 5 of the 13 couples. Out of the 8 couples in which no causative diagnosis could be established 4 consented to undergo further analysis, in two of those a potentially causative variant in a novel candidate gene was identified. Conclusions: For the families in whom causative variants could be identified, these may now be used for prenatal and preimplantation genetic diagnostics. Our data show that NGS based gene panel sequencing of selected genes involved in lethal autosomal recessive disorders is an effective tool for carrier screening in parents and for the identification of recessive gene defects and offers the possibility of prenatal and preimplantation genetic diagnosis in further pregnancies in families that have experienced deaths in early childhood and /or multiple abortions.

KW - autosomal recessive

KW - carrier screening

KW - consanguineous

KW - next generation sequencing

KW - panel diagnostics

UR - http://www.scopus.com/inward/record.url?scp=85041121617&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041121617&partnerID=8YFLogxK

U2 - 10.1186/s13023-018-0763-0

DO - 10.1186/s13023-018-0763-0

M3 - Article

AN - SCOPUS:85041121617

VL - 13

JO - Orphanet Journal of Rare Diseases

JF - Orphanet Journal of Rare Diseases

SN - 1750-1172

IS - 1

M1 - 23

ER -