alexa A Novel Nonsense Mutation p.L9X in the SRY Gene Causes Complete Gonadal Dysgenesis in a 46,XY Female Patient
ISSN: 2157-7412

Journal of Genetic Syndromes & Gene Therapy
Open Access

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Research Article

A Novel Nonsense Mutation p.L9X in the SRY Gene Causes Complete Gonadal Dysgenesis in a 46,XY Female Patient

Asma Tajouri1, Maryem M’sahli1, Syrine Hizem2, Lamia Ben Jemaa2, Faouzi Maazoul3, Ridha M’rad1,3, Habiba Bouhamed Chaabouni1 and Maher Kharrat1*

1University of Tunis El Manar, Faculty of Medicine of Tunis, LR99ES10 Human Genetics Laboratory, 1007 Tunis, Tunisia

2Congenital Hereditary Diseases Department and Hospital Mongi Slim, 2046, La Marsa, Tunisia

3Congenital Hereditary Diseases Service and the Charles Nicolle Hospital, 1007, Tunis, Tunisia

*Corresponding Author:
Dr. Maher Kharrat
University of Tunis El Manar, Faculty of Medicine of Tunis
LR99ES10 Human Genetics Laboratory, 1007 Tunis, Tunisia
Tel: +216-71 570756
Fax: +216 71 570553
E-mail: [email protected]

Received date: June 13, 2016; Accepted date: August 01, 2016; Published date: August 08, 2016

Citation: Tajouri A, M’sahli M, Hizem S, Jemaa LB, Maazoul F, et al. (2016) A Novel Nonsense Mutation p.L9X in the SRY Gene Causes Complete Gonadal Dysgenesis in a 46,XY Female Patient. J Genet Syndr Gene Ther 7:300. doi:10.4172/2157-7412.1000300

Copyright: © 2016 Tajouri A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Mammalian sex is determined by a gene localized on the Y chromosome known as SRY (sex-determining region of the Y chromosome). SRY is a transcription factor that plays a key role in the initiation of the cascade of male sexual differentiation. In 46,XY humans, SRY mutations cause complete gonadal dysgenesis (CGD) with male to female sex reversal, which results in female genitalia without testis differentiation. The aim of this study was to look for mutations of SRY gene in a 46,XY CGD Tunisian female patient by direct sequencing. This method allowed us to identify a novel nonsense mutation L9X, occurring within the NH2 terminal domain of SRY. This novel mutation led to the appearance of a premature stop codon, resulting in a truncated protein, missing the entire HMG box functional domain and the COOH terminal domain. Because of an increased risk of developing gonadoblastoma, early molecular diagnosis allows the orientation of the clinical supervision by removing the dysgenetic gonads to prevent gonadal malignancy. Furthermore, it provides valuable information for the understanding of molecular mechanisms behind the gonadal dysgenesis.

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