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Sánchez-Chaparro MM, Garza-Veloz I, Zayas-Villanueva OA, Martinez-Fierro ML, Delgado-Enciso I, Gomez-Govea MA, Martínez-de-Villarreal LE, Reséndez-Pérez D, Rodríguez-Sánchez IP. Genetic Variants in the 3'UTR of BRCA1 and BRCA2 Genes and their Putative Effects on the microRNA Mechanism in Hereditary Breast and Ovarian Cancer. Diagnostics (Basel) 2020; 10:diagnostics10050298. [PMID: 32414209 PMCID: PMC7277914 DOI: 10.3390/diagnostics10050298] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/01/2020] [Accepted: 04/10/2020] [Indexed: 12/31/2022] Open
Abstract
Hereditary breast and ovarian cancer (HBOC) syndrome is mainly caused by mutations in the BRCA1 and BRCA2 genes. The 3’UTR region allows for the binding of microRNAs, which are involved in genetic tune regulation. We aimed to identify allelic variants on 3’UTR miRNA-binding sites in the BRCA1 and BRCA2 genes in HBOC patients. Blood samples were obtained from 50 patients with HBOC and from 50 controls. The 3’UTR regions of BRCA1 and BRCA2 were amplified by PCR and sequenced to identify genetic variants using bioinformatics tools. We detected nine polymorphisms in 3’UTR, namely: four in BRCA1 (rs3092995 (C/G), rs8176318 (C/T), rs111791349 (G/A), and rs12516 (C/T)) and five in BRCA2 (rs15869 (A/C), rs7334543 (A/G), rs1157836 (A/G), and rs75353978 (TT/del TT)). A new variant in position c.*457 (A/C) on 3’UTR of BRCA2 was also identified. The following three variants increased the risk of HBOC in the study population: rs111791349-A, rs15869-C, and c.*457-C (odds ratio (OR) range 3.7–15.4; p < 0.05). Genetic variants into the 3’UTR of BRCA1 and BRCA2 increased the risk of HBOC between 3.7–15.4 times in the study population. The presence/absence of these polymorphisms may influence the loss/creation of miRNA binding sites, such as hsa-miR-1248 in BRCA1 3′UTR or the hsa-miR-548 family binding site in BRCA2. Our results add new evidence of miRNA participation in the pathogenesis of HBOC.
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Affiliation(s)
- María Marisela Sánchez-Chaparro
- Laboratory of Immunology and Virology, Collage of Biological Sciences, Universidad Autónoma de Nuevo Leon, San Nicolas de los Garza, Nuevo Leon 66451, Mexico; (M.M.S.-C.); (D.R.-P.)
| | - Idalia Garza-Veloz
- Molecular Medicine Laboratory, Human Medicine and HS Academic Unit, Universidad Autonoma de Zacatecas, Zacatecas, Zacatecas 98160, Mexico;
| | - Omar Alejandro Zayas-Villanueva
- University Center Against Cancer (CUCC), Hospital Universitario “Dr. José E. González”, Collage of Medicine, Universidad Autónoma de Nuevo Leon, Monterrey, Nuevo Leon 64460, Mexico;
| | - Margarita L. Martinez-Fierro
- Molecular Medicine Laboratory, Human Medicine and HS Academic Unit, Universidad Autonoma de Zacatecas, Zacatecas, Zacatecas 98160, Mexico;
- Correspondence: (M.L.M.-F.); (I.P.R.-S.); Tel.: +52-492-925-6690 (M.L.M.-F.); +52-818-329-4217 (I.P.R.-S.)
| | - Iván Delgado-Enciso
- Faculty of Medicine, Universidad de Colima, Colima, Colima 28040, Mexico;
- Colima State Cancer Institute, Universidad de Colima, Colima, Colima 28040, Mexico
| | - Mayra Alejandra Gomez-Govea
- Laboratory of Molecular and Structural Physiology, Collage of Biological Sciences, Universidad Autonoma de Nuevo Leon, San Nicolas de los Garza, Nuevo Leon 66451, Mexico;
| | | | - Diana Reséndez-Pérez
- Laboratory of Immunology and Virology, Collage of Biological Sciences, Universidad Autónoma de Nuevo Leon, San Nicolas de los Garza, Nuevo Leon 66451, Mexico; (M.M.S.-C.); (D.R.-P.)
| | - Iram Pablo Rodríguez-Sánchez
- Laboratory of Molecular and Structural Physiology, Collage of Biological Sciences, Universidad Autonoma de Nuevo Leon, San Nicolas de los Garza, Nuevo Leon 66451, Mexico;
- Correspondence: (M.L.M.-F.); (I.P.R.-S.); Tel.: +52-492-925-6690 (M.L.M.-F.); +52-818-329-4217 (I.P.R.-S.)
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