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Politi C, Grillone K, Nocera D, Colao E, Bellisario ML, Loddo S, Catino G, Novelli A, Perrotti N, Rodolfo I, Malatesta P. Non-Invasive Prenatal Test Analysis Opens a Pandora's Box: Identification of Very Rare Cases of SRY-Positive Healthy Females, Segregating for Three Generations Thanks to Preferential Inactivation of the XqYp Translocated Chromosome. Genes (Basel) 2024; 15:103. [PMID: 38254992 PMCID: PMC10815901 DOI: 10.3390/genes15010103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/03/2024] [Accepted: 01/12/2024] [Indexed: 01/24/2024] Open
Abstract
The translocation of the testis-determining factor, the SRY gene, from the Y to the X chromosome is a rare event that causes abnormalities in gonadal development. In all cases of males and females carrying this translocation, disorder of sex development is reported. In our study, we described a peculiar pedigree with the first evidence of four healthy females from three generations who are carriers of the newly identified t(X;Y)(q28;p11.2)(SRY+) translocation with no evidence of ambiguous genitalia or other SRY-dependent alterations. Our study was a consequence of a Non-Invasive Prenatal Test (NIPT) showing a sexual chromosomal abnormality (XXY) followed by a chorionic villus analysis suggesting a normal karyotype 46,XX and t(X;Y) translocation detected by FISH. Here, we (i) demonstrated the inheritance of the translocation in the maternal lineage via karyotyping and FISH analysis; (ii) characterised the structural rearrangement via chromosomal microarray; and (iii) demonstrated, via Click-iT® EdU Imaging assay, that there was an absolute preferential inactivation of the der(X) chromosome responsible for the lack of SRY expression. Overall, our study provides valuable genetic and molecular information that may lead personal and medical decisions.
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Affiliation(s)
- Cristina Politi
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
| | - Katia Grillone
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
| | - Donatella Nocera
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
| | - Emma Colao
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
| | - Michelle Li Bellisario
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
| | - Sara Loddo
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children Hospital, Scientific Institute for Research, Hospitalization and Healthcare (IRCCS), 00146 Rome, Italy; (S.L.); (G.C.); (A.N.)
| | - Giorgia Catino
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children Hospital, Scientific Institute for Research, Hospitalization and Healthcare (IRCCS), 00146 Rome, Italy; (S.L.); (G.C.); (A.N.)
| | - Antonio Novelli
- Laboratory of Medical Genetics, Translational Cytogenomics Research Unit, Bambino Gesù Children Hospital, Scientific Institute for Research, Hospitalization and Healthcare (IRCCS), 00146 Rome, Italy; (S.L.); (G.C.); (A.N.)
| | - Nicola Perrotti
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
- Department of Human Health, University Magna Graecia of Catanzaro, Campus S. Venuta, Viale Europa, Località Germaneto, 88100 Catanzaro, Italy
| | - Iuliano Rodolfo
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
- Department of Human Health, University Magna Graecia of Catanzaro, Campus S. Venuta, Viale Europa, Località Germaneto, 88100 Catanzaro, Italy
| | - Paola Malatesta
- Medical Genetics, Renato Dulbecco University Hospital, Viale T. Campanella 115, 88100 Catanzaro, Italy; (C.P.); (K.G.); (D.N.); (E.C.); (M.L.B.); (N.P.); (P.M.)
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