New mutation of ar gene in patients with androgen insensitivity syndrome

Anh Lương Thị Lan, Phấn Trần Đức, Phượng Đoàn Thị Kim, Tôn Nguyễn Đăng , Trang Nguyễn Thị, Lan Hoàng Thu, Anh Nguyễn Hữu Đức, Thi Minh Ngọc Nguyễn

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Abstract

Androgen insensitivity syndrome (AIS) is one of the most common genetic conditions, which affects a child’s sexual development before birth and during puberty. People with this syndrome are genetically male but are born with all or some of the physical traits of a female. The AR gene test is an accurate method of determining the cause of the AIS. In this study, we used Sanger sequencing to identify mutations in AR gene. AIS’s patient with a female phenotype and his mother were subjects in the study. As a result, we found a completely new mutation c.2246C>T (p.Ala749Val) on exon 5 of the AR gene, which had not been reported in NCBI. The patient's mutation in the hemizygous form was inherited from the patient's mother in the heterozygous form. The patient should be oriented to its proper gender. This study provides a new mutation of AR gene in Vietnamese patients to further identify the genetic cause and contribute to the clinical management and genetics counseling in prenatal for the affected family.

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References

1. Guli’a C, Baldassarra S, Zangari A, et al. Androgen insensitivity syndrome. Eur Rev Med Pharmacol Sci. 2018;22(12):3873-3887. doi:10.26355/eurrev_201806_15272.
2. Hughes IA, Davies JD, Bunch TI, Pasterski V, Mastroyannopoulou K, MacDougall J. Androgen insensitivity syndrome. Lancet. 2012;380:1419-28. doi:10.1016/S0140-6736(12)60071-3.
3. GeneCards. AR gene. The Human gene database. 2021;53, GCID:GC0XP067544.
4. Nurin Aisyiyah Listyasari et al. Genetic Analysis Reveals Complete Androgen Insensitivity Syndrome in Female Children Surgically Treated for Inguinal Hernia. Journal of Investigative Surgery. 2019;23:1-7. doi:10.1080/08941939.2019.1602690.
5. Hughes IA, Deeb A. Androgen resistance. Best Pract Res Clin Endocrinol Metab. 2006;20:577-98. doi:10.1016/j.beem.2006.11.003
6. Lee PA, Houk CP, Ahmed SF, Hughes IA, International Consensus Conference on Intersex organized by the Lawson Wilkins Pediatric Endocrine Society and the European Society for Paediatric Endocrinology. Consensus statement on management of intersex disorders. International Consensus Conference on Intersex. Pediatrics. 2006;118:e488-500. doi:10.1542/peds.2006-0738.
7. Brinkmann AO, Faber PW, van Rooij HC, Kuiper GG, Ris C, Klaassen P, van der Korput JA, Voorhorst MM, van Laar JH, Mulder E, Trapman J. The human androgen receptor: domain structure, genomic organization and regulation of expression. Journal of Steroid Biochemistry. 1989;34(1-6):307-310. doi:10.1016/0022-4731(89)90098-8.
8. Faber PW, Kuiper GG, van Rooij HC, van der Korput JA, Brinkmann AO, Trapman J .The N-terminal domain of the human androgen receptor is encoded by one, large exon. Molecular and Cellular Endocrinology. 1989;61(2):257-262. doi:10.1016/0303-7207(89)90137-8.
9. Gottlieb B, Beitel LK, Wu JH, Trifiro M. The androgen receptor gene mutations database (ARDB): update. Human Mutation. 2004;23(6):527-533. doi.10.1002/humu.20044.
10. Lubs HA, Vilar O, Bergenstal DM. Familial male pseudohermaphrodism with labial testes and partial feminization: endocrine studies and genetic aspects. J Clin Endocrinol Metab. 1959;19:1110-1120.doi:10.1210/jcem-19-9-1110.
11. NCBI. National Center for Biotechnology Information: https://www.ncbi.nlm.nih.gov/clinvar/?term=AR. Accessed July, 5, 2021.
12. Köhler B, Lumbroso S, Leger J, Audran F, Grau ES, Kurtz F, Pinto G, Salerno M, Semitcheva T, Czernichow P, Sultan C. Androgen insensitivity syndrome: somatic mosaicism of the androgen receptor in seven families and consequences for sex assignment and genetic counseling. Journal Clinical Endocrinology and Metabolism. 2005;90 (1):106-111.doi:10.1210/jc.2004-0462.
13. Mongan NP, Tadokoro-Cuccaro R, Bunch T, Hughes IA. Androgen insensitivity syndrome. Best Pract Res Clin Endocrinol Metab. 2015;29(4):569-80. doi:10.1016/j.beem.2015.04.005.