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Identification and Molecular Characterization of a Novel Large-Scale Variant (Exons 4_18 Loss) in the LDLR Gene as a Cause of Familial Hypercholesterolaemia in an Italian Family
Concolino, P.; De Paolis, E.; Moffa, S.; Onori, M.E.; Soldovieri, L.; Ricciardi Tenore, C.; De Bonis, M.; Rabacchi, C.; Santonocito, C.; Rinelli, M.; Calandra, S.; Giaccari, A.; Urbani, A.; Minucci, A. Identification and Molecular Characterization of a Novel Large-Scale Variant (Exons 4_18 Loss) in the LDLR Gene as a Cause of Familial Hypercholesterolaemia in an Italian Family. Genes2023, 14, 1275.
Concolino, P.; De Paolis, E.; Moffa, S.; Onori, M.E.; Soldovieri, L.; Ricciardi Tenore, C.; De Bonis, M.; Rabacchi, C.; Santonocito, C.; Rinelli, M.; Calandra, S.; Giaccari, A.; Urbani, A.; Minucci, A. Identification and Molecular Characterization of a Novel Large-Scale Variant (Exons 4_18 Loss) in the LDLR Gene as a Cause of Familial Hypercholesterolaemia in an Italian Family. Genes 2023, 14, 1275.
Concolino, P.; De Paolis, E.; Moffa, S.; Onori, M.E.; Soldovieri, L.; Ricciardi Tenore, C.; De Bonis, M.; Rabacchi, C.; Santonocito, C.; Rinelli, M.; Calandra, S.; Giaccari, A.; Urbani, A.; Minucci, A. Identification and Molecular Characterization of a Novel Large-Scale Variant (Exons 4_18 Loss) in the LDLR Gene as a Cause of Familial Hypercholesterolaemia in an Italian Family. Genes2023, 14, 1275.
Concolino, P.; De Paolis, E.; Moffa, S.; Onori, M.E.; Soldovieri, L.; Ricciardi Tenore, C.; De Bonis, M.; Rabacchi, C.; Santonocito, C.; Rinelli, M.; Calandra, S.; Giaccari, A.; Urbani, A.; Minucci, A. Identification and Molecular Characterization of a Novel Large-Scale Variant (Exons 4_18 Loss) in the LDLR Gene as a Cause of Familial Hypercholesterolaemia in an Italian Family. Genes 2023, 14, 1275.
Abstract
Next Generation Sequencing (NGS), now widely used in the clinical setting, offers an efficient and comprehensive molecular approach for patients with Familial hypercholesterolemia (FH). Although the dominant form of disease is mostly due to low-density lipoprotein receptor (LDLR) small-scale pathogenic variants, approximately 10% of molecularly defined FH cases are due to Copy Number Variations (CNVs). Here, we report a novel large deletion of the LDLR gene involving exons 4–18, identified by bioinformatic analysis of NGS data in an Italian family. A long PCR strategy was employed for breakpoint region analysis where an insertion of 6 nucleotides (TTCACT) was found. Two Alu sequences, identified within intron 3 and exon 18, could underlie the identified rearrangement by a Nonallelic Homologous Recombination (NAHR) mechanism. NGS proves to be a powerful tool used to precisely identify CNVs, in addition to small-scale variants in FH-related genes. At this purpose, the use and implementation of this cost-effective, efficient molecular approach meets the clinical need for personalized diagnosis in FH cases.
Keywords
Familial hypercholesterolemia; Next Generation Sequencing; LDL-cholesterol; LDLR gene; Copy number variations (CNVs); Alu sequences
Subject
Biology and Life Sciences, Biochemistry and Molecular Biology
Copyright:
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