Identification of thalassemia gene cluster deletion by long-read whole-genome sequencing (LR-WGS).
gene deletions
next-generation sequencing
thalassemia
whole-genome sequencing
Journal
International journal of laboratory hematology
ISSN: 1751-553X
Titre abrégé: Int J Lab Hematol
Pays: England
ID NLM: 101300213
Informations de publication
Date de publication:
Aug 2021
Aug 2021
Historique:
revised:
18
11
2020
received:
22
09
2020
accepted:
14
12
2020
pubmed:
6
1
2021
medline:
28
8
2021
entrez:
5
1
2021
Statut:
ppublish
Résumé
At present, a variety of molecular detection methods are obtained to diagnose thalassemia accurately. Although exome sequencing or specific panels have been widely used in clinical diagnosis of genetic diseases, the positive rate is about 25%-30%. Because the detection range is limited to exons and splice sites, and the read length is usually 100-150 bp, there are limitations in the detection of globin gene clusters with pseudogenes. In this study, seven thalassemia patients were selected to perform whole-genome sequencing (WGS) with long read at 400 bp to make accurate detection for thalassemia deletions. And we used PCR and Sanger sequencing to confirm the gene deletions in the patients. WGS analysis detected a rare 172 kb deletion on the α-globin gene cluster at chr16: 57 009-330 001, 19 kb deletion at chr16: 215 396-234 699, 11 kb deletion at chr16:220 861-231 981; and 27 kb deletion on the β-globin gene deletion at chr11: 5 222 878-5 250 288, 21.4 kb deletion at chr11: 5 236 361-5 257 771, 78.9 kb deletion at chr11: 5 191 121-5 270 050. All the seven patients carried heterozygous deletions, including three in α-gene cluster, three in β-gene cluster, and one in both globin clusters. Our results indicate that long-read WGS will be beneficial to the diagnosis of genetic diseases with pseudogenes or highly duplicated sequences and will enable clinical geneticists to inform high-risk couples and provide prenatal diagnosis.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
859-865Informations de copyright
© 2021 John Wiley & Sons Ltd.
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