Association study of gender identity disorder and sex hormone-related genes

• Published in: Progress in neuro-psychopharmacology & biological psychiatry 2009-10, Vol.33 (7), p.1241-1244
• Main Authors: Ujike, Hiroshi, Otani, Kyohei, Nakatsuka, Mikiya, Ishii, Kazushi, Sasaki, Aiko, Oishi, Tomoko, Sato, Toshiki, Okahisa, Yuko, Matsumoto, Yosuke, Namba, Yuzaburo, Kimata, Yoshihiro, Kuroda, Shigetoshi
• Format: Article
• Language: English
• Subjects: Adult; Adult and adolescent clinical studies; Androgen receptor; Aromatase - genetics; Biological and medical sciences; Chi-Square Distribution; Estrogen receptor; Estrogen Receptor alpha - genetics; Estrogen Receptor beta - genetics; Female; Gender Identity; Gender identity disorder; Genetic association study; Genetic Predisposition to Disease; Genotype; Gonadal Steroid Hormones - classification; Gonadal Steroid Hormones - genetics; Humans; Male; Medical sciences; Middle Aged; Miscellaneous; Neuropharmacology; Pharmacology. Drug treatments; Polymorphism, Genetic; Psychiatric Status Rating Scales; Psychology. Psychoanalysis. Psychiatry; Psychopathology. Psychiatry; Receptors, Androgen - genetics; Receptors, Steroid - genetics; Statistics, Nonparametric; Transsexualism; Transsexualism - genetics; Transsexualism - psychology
• ISSN: 0278-5846; 1878-4216
• DOI: 10.1016/j.pnpbp.2009.07.008

To investigate the biological mechanism of gender identity disorder (GID), five candidate sex hormone-related genes, encoding androgen receptor ( AR), estrogen receptors α ( ERα) and β ( ERβ), aromatase ( CYP19), and progesterone receptor ( PGR) were analyzed by a case–control association study. Subjects were 242 transsexuals (74 male-to-female patients (MTF) and 168 female-to-male patients (FTM)), and 275 healthy age- and geographical origin-matched controls (106 males and 169 females). The distributions of CAG repeat numbers in exon 1 of AR, TA repeat numbers in the promoter region of ERα, CA repeat numbers in intron 5 of ERβ, TTTA repeat numbers in intron 4 of CYP19, and six polymorphisms (rs2008112, rs508653, V660L, H770H, rs572698 and PROGINS) of PGR were analyzed. No significant difference in allelic or genotypic distribution of any gene examined was found between MTFs and control males or between FTMs and control females. The present findings do not provide any evidence that genetic variants of sex hormone-related genes confer individual susceptibility to MTF or FTM transsexualism.