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Gana N, Huluță I, Cătănescu MȘ, Apostol LM, Nedelea FM, Sima RM, Botezatu R, Panaitescu AM, Gică N. Congenital Cytomegalovirus-Related Hearing Loss. Audiol Res 2024; 14:507-517. [PMID: 38920964 PMCID: PMC11200402 DOI: 10.3390/audiolres14030043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 06/09/2024] [Accepted: 06/11/2024] [Indexed: 06/27/2024] Open
Abstract
Congenital hearing loss is a significant global health concern that affects millions of newborns and infants worldwide, posing substantial challenges for affected individuals, their families, and healthcare systems. This condition, present at birth, can stem from genetic factors, in utero exposures, infections, or complications during pregnancy or childbirth. The spectrum of congenital hearing loss ranges from mild to profound, impacting the development of speech, language, and cognitive skills, thereby influencing educational achievements, social integration, and future employment opportunities. Early detection and intervention strategies, such as newborn hearing screenings, genetic counseling, and the use of hearing aids or cochlear implants, are crucial for mitigating these impacts. This review article aims to explore the diagnostic approaches and management strategies for congenital cytomegalovirus-related hearing loss, emphasizing the importance of interdisciplinary care and the potential for technological advances to improve outcomes for affected individuals.
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Affiliation(s)
- Nicoleta Gana
- Filantropia Clinical Hospital, 011171 Bucharest, Romania; (N.G.); (I.H.); (M.-Ș.C.); (R.-M.S.); (R.B.); (A.M.P.); (N.G.)
| | - Iulia Huluță
- Filantropia Clinical Hospital, 011171 Bucharest, Romania; (N.G.); (I.H.); (M.-Ș.C.); (R.-M.S.); (R.B.); (A.M.P.); (N.G.)
- Gynecology Department, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Mihai-Ștefan Cătănescu
- Filantropia Clinical Hospital, 011171 Bucharest, Romania; (N.G.); (I.H.); (M.-Ș.C.); (R.-M.S.); (R.B.); (A.M.P.); (N.G.)
| | - Livia-Mihaela Apostol
- Gynecology Department, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Florina Mihaela Nedelea
- Gynecology Department, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Romina-Marina Sima
- Filantropia Clinical Hospital, 011171 Bucharest, Romania; (N.G.); (I.H.); (M.-Ș.C.); (R.-M.S.); (R.B.); (A.M.P.); (N.G.)
| | - Radu Botezatu
- Filantropia Clinical Hospital, 011171 Bucharest, Romania; (N.G.); (I.H.); (M.-Ș.C.); (R.-M.S.); (R.B.); (A.M.P.); (N.G.)
- Gynecology Department, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Anca Maria Panaitescu
- Filantropia Clinical Hospital, 011171 Bucharest, Romania; (N.G.); (I.H.); (M.-Ș.C.); (R.-M.S.); (R.B.); (A.M.P.); (N.G.)
- Gynecology Department, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Nicolae Gică
- Filantropia Clinical Hospital, 011171 Bucharest, Romania; (N.G.); (I.H.); (M.-Ș.C.); (R.-M.S.); (R.B.); (A.M.P.); (N.G.)
- Gynecology Department, Faculty of Medicine, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania;
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Le Nabec A, Blotas C, Briset A, Collobert M, Férec C, Moisan S. 3D Chromatin Organization Involving MEIS1 Factor in the cis-Regulatory Landscape of GJB2. Int J Mol Sci 2022; 23:ijms23136964. [PMID: 35805969 PMCID: PMC9266880 DOI: 10.3390/ijms23136964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/17/2022] [Accepted: 06/21/2022] [Indexed: 02/04/2023] Open
Abstract
The human genome is covered by 8% of candidate cis-regulatory elements. The identification of distal acting regulatory elements and an understanding of their action are crucial to determining their key role in gene expression. Disruptions of such regulatory elements and/or chromatin conformation are likely to play a critical role in human genetic diseases. Non-syndromic hearing loss (i.e., DFNB1) is mostly due to GJB2 (Gap Junction Beta 2) variations and DFNB1 large deletions. Although several GJB2 cis-regulatory elements (CREs) have been described, GJB2 gene regulation remains not well understood. We investigated the endogenous effect of these CREs with CRISPR (clustered regularly interspaced short palindromic repeats) disruptions and observed GJB2 expression. To decipher the GJB2 regulatory landscape, we used the 4C-seq technique and defined new chromatin contacts inside the DFNB1 locus, which permit DNA loops and long-range regulation. Moreover, through ChIP-PCR, we determined the involvement of the MEIS1 transcription factor in GJB2 expression. Taken together, the results of our study enable us to describe the 3D DFNB1 regulatory landscape.
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Affiliation(s)
- Anaïs Le Nabec
- University Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (C.B.); (A.B.); (M.C.); (C.F.)
- Correspondence: or twitter@anaisnabec (A.L.N.); (S.M.); Tel.: +33-2-98-01-65-84 (A.L.N.); +33-2-98-01-65-67 (S.M.)
| | - Clara Blotas
- University Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (C.B.); (A.B.); (M.C.); (C.F.)
| | - Alinéor Briset
- University Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (C.B.); (A.B.); (M.C.); (C.F.)
| | - Mégane Collobert
- University Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (C.B.); (A.B.); (M.C.); (C.F.)
| | - Claude Férec
- University Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (C.B.); (A.B.); (M.C.); (C.F.)
| | - Stéphanie Moisan
- University Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (C.B.); (A.B.); (M.C.); (C.F.)
- Laboratoire de Génétique Moléculaire et d’Histocompatibilité, CHRU Brest, UMR 1078, F-29200 Brest, France
- Correspondence: or twitter@anaisnabec (A.L.N.); (S.M.); Tel.: +33-2-98-01-65-84 (A.L.N.); +33-2-98-01-65-67 (S.M.)
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Le Nabec A, Collobert M, Le Maréchal C, Marianowski R, Férec C, Moisan S. Whole-Genome Sequencing Improves the Diagnosis of DFNB1 Monoallelic Patients. Genes (Basel) 2021; 12:1267. [PMID: 34440441 PMCID: PMC8391926 DOI: 10.3390/genes12081267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 11/16/2022] Open
Abstract
Hearing loss is the most common sensory defect, due in most cases to a genetic origin. Variants in the GJB2 gene are responsible for up to 30% of non-syndromic hearing loss. Today, several deafness genotypes remain incomplete, confronting us with a diagnostic deadlock. In this study, whole-genome sequencing (WGS) was performed on 10 DFNB1 patients with incomplete genotypes. New variations on GJB2 were identified for four patients. Functional assays were realized to explore the function of one of them in the GJB2 promoter and confirm its impact on GJB2 expression. Thus, in this study WGS resolved patient genotypes, thus unlocking diagnosis. WGS afforded progress and bridged some gaps in our research.
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Affiliation(s)
- Anaïs Le Nabec
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (M.C.); (C.L.M.); (C.F.)
| | - Mégane Collobert
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (M.C.); (C.L.M.); (C.F.)
| | - Cédric Le Maréchal
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (M.C.); (C.L.M.); (C.F.)
- Laboratoire de Génétique Moléculaire et d’Histocompatibilité, CHRU Brest, UMR 1078, F-29200 Brest, France
| | - Rémi Marianowski
- Service ORL et Chirurgie Cervicofaciale du CHRU Brest, F-29200 Brest, France;
| | - Claude Férec
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (M.C.); (C.L.M.); (C.F.)
- Laboratoire de Génétique Moléculaire et d’Histocompatibilité, CHRU Brest, UMR 1078, F-29200 Brest, France
| | - Stéphanie Moisan
- Univ Brest, Inserm, EFS, UMR 1078, GGB, F-29200 Brest, France; (M.C.); (C.L.M.); (C.F.)
- Laboratoire de Génétique Moléculaire et d’Histocompatibilité, CHRU Brest, UMR 1078, F-29200 Brest, France
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