A 132 bp deletion affecting the
DNA Methylation
Genetics
Sequence Deletion
Journal
Journal of medical genetics
ISSN: 1468-6244
Titre abrégé: J Med Genet
Pays: England
ID NLM: 2985087R
Informations de publication
Date de publication:
02 2023
02 2023
Historique:
received:
27
10
2021
accepted:
08
03
2022
pubmed:
1
7
2022
medline:
27
1
2023
entrez:
30
6
2022
Statut:
ppublish
Résumé
Imprinting centre 2 (IC2) in the chromosomal region 11p15.5 regulates the monoallelic expression of imprinted genes by differential methylation of paternal and maternal chromosomes. Copy number variants in IC2 are associated with Beckwith-Wiedemann syndrome and Silver-Russell syndrome (SRS). Clinical outcome of IC2 deletions seems to depend on the parental origin of the chromosome, deletion size and inclusion or exclusion of enhancer and promoter regions. A paternally inherited 132 bp deletion within the Only six cases have been reported with deletions involving exclusively IC2, one being identical to our proband's 132 bp deletion. Our study, which is based on more extensive segregation data than the previous 132 bp deletion report, confirms the association of this deletion with growth restriction when paternally inherited. Remarkably, even though our patient has the same deletion, he has more pronounced phenotypic features; our findings thus suggest that some degree of clinical variability may be associated with this loss.
Sections du résumé
BACKGROUND
Imprinting centre 2 (IC2) in the chromosomal region 11p15.5 regulates the monoallelic expression of imprinted genes by differential methylation of paternal and maternal chromosomes. Copy number variants in IC2 are associated with Beckwith-Wiedemann syndrome and Silver-Russell syndrome (SRS). Clinical outcome of IC2 deletions seems to depend on the parental origin of the chromosome, deletion size and inclusion or exclusion of enhancer and promoter regions.
RESULTS
A paternally inherited 132 bp deletion within the
CONCLUSION
Only six cases have been reported with deletions involving exclusively IC2, one being identical to our proband's 132 bp deletion. Our study, which is based on more extensive segregation data than the previous 132 bp deletion report, confirms the association of this deletion with growth restriction when paternally inherited. Remarkably, even though our patient has the same deletion, he has more pronounced phenotypic features; our findings thus suggest that some degree of clinical variability may be associated with this loss.
Identifiants
pubmed: 35772847
pii: jmedgenet-2021-108288
doi: 10.1136/jmedgenet-2021-108288
pmc: PMC9887386
doi:
Substances chimiques
KCNQ1OT1 long non-coding RNA, human
0
RNA, Long Noncoding
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
134-136Commentaires et corrections
Type : CommentIn
Informations de copyright
© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.
Déclaration de conflit d'intérêts
Competing interests: None declared.
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