Variants in Candidate Genes for Phenotype Heterogeneity in Patients with the 22q11.2 Deletion Syndrome

Autor(es):Mostrar menos -

Nunes, Natalia ; Carvalho Nunes, Beatriz ; Zamariolli, Malu ; Soares, Diogo Cordeiro de Queiroz ; dos Santos, Leonardo Caires ; Dantas, Anelisa Gollo ; Meloni, Vera Ayres ; Belangero, Sintia Iole ; Gil-Da-Silva-Lopes, Vera Lucia ; Kim, Chong Ae ; Melaragno, Maria Isabel

• Tipo de documento: Artigo Científico
• Fonte: GENETICS RESEARCH; v. 2024, p. 9-pg., 2024-03-30.

Resumo

22q11.2 deletion syndrome (22q11.2DS) is a microdeletion syndrome with a broad and heterogeneous phenotype, even though most of the deletions present similar sizes, involving similar to 3 Mb of DNA. In a relatively large population of a Brazilian 22q11.2DS cohort (60 patients), we investigated genetic variants that could act as genetic modifiers and contribute to the phenotypic heterogeneity, using a targeted NGS (Next Generation Sequencing) with a specific Ion AmpliSeq panel to sequence nine candidate genes (CRKL, MAPK1, HIRA, TANGO2, PI4KA, HDAC1, ZDHHC8, ZFPM2, and JAM3), mapped in and outside the 22q11.2 hemizygous deleted region. In silico prediction was performed, and the whole-genome sequencing annotation analysis package (WGSA) was used to predict the possible pathogenic effect of single nucleotide variants (SNVs). For the in silico prediction of the indels, we used the genomic variants filtered by a deep learning model in NGS (GARFIELD-NGS). We identified six variants, 4 SNVs and 2 indels, in MAPK1, JAM3, and ZFPM2 genes with possibly synergistic deleterious effects in the context of the 22q11.2 deletion. Our results provide the opportunity for the discovery of the co-occurrence of genetic variants with 22q11.2 deletions, which may influence the patients ' phenotype. (AU)

• Processo FAPESP: 19/21644-0 - Impacto de variantes genéticas na estabilidade do genoma e seus efeitos no fenótipo
• Beneficiário: Maria Isabel de Souza Aranha Melaragno
• Modalidade de apoio: Auxílio à Pesquisa - Temático