title: Effects of trichostatin a, a histone deacetylase inhibitor, on mouse gonadal development in vitro.
abstract: Sry, Sox9 and M33 are thought to act as architectural transcription factors or as a chromatin regulator in gonadal development. However, the direct relationship between chromatin structure and sex determination has not yet been revealed. To clarify the effect of chromatin structural change on gonadal development, we examined the effects of trichostatin A, a histone deacetylase inhibitor, on mouse gonadal development in vitro. In the 0.1 microM treated testicular explants, the size of the gonad was significantly decreased, although the testicular cord formation occurred normally. In the 1.0 microM treated explants, the gonads revealed one or two large testicular cords. Sox9 and MIS expressions suggest that Sertoli cell differentiation is induced normally within the testicular cord, while Dnmt3b expression suggests that several immature Sertoli cells are located on the outside of the testicular cord. The 3beta-hsd expression indicates that Leydig cell differentiation occurs normally. On the other hand, germ cell loss was observed in the treated testicular explants. In the treated ovarian explants, the number of premeiotic germ cells was reduced without gonadal size change. Thus, trichostatin A affects the development of germ cells, but does not affect sex determination.
authors.affiliation: Department of Veterinary Anatomy, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan. aa17134@mail.ecc.u-tokyo.ac.jp
authors.forename: Takuo
authors.initials: T
authors.lastname: Mizukami
authors.forename: Masahiko
authors.initials: M
authors.lastname: Fujisawa
authors.forename: Yoshiakira
authors.initials: Y
authors.lastname: Kanai
authors.forename: Masamichi
authors.initials: M
authors.lastname: Kurohmaru
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Hayashi
mesh_terms: D000818:Animals; D054304:Anti-Mullerian Hormone; D017209:Apoptosis; D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D002843:Chromatin / Q000378:metabolism; D004248:DNA (Cytosine-5-)-Methyltransferases / Q000096:biosynthesis; D000090205:DNA Methyltransferase 3A; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005260:Female; D005854:Germ Cells / Q000187:drug effects; D006023:Glycoproteins / Q000378:metabolism; D006066:Gonads / Q000166:cytology* / Q000378:metabolism; D056572:Histone Deacetylase Inhibitors; D006877:Hydroxamic Acids / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D009924:Organ Culture Techniques; D012313:RNA / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012708:Sertoli Cells / Q000166:cytology / Q000648:ultrastructure; D012737:Sex Factors; D013735:Testicular Hormones / Q000378:metabolism; D013737:Testis / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure; D013997:Time Factors; D014158:Transcription, Genetic
chemical_list: D002843:Chromatin; D004791:Enzyme Inhibitors; D006023:Glycoproteins; D056572:Histone Deacetylase Inhibitors; D006877:Hydroxamic Acids; D013735:Testicular Hormones; C012589:trichostatin A; D012313:RNA; D054304:Anti-Mullerian Hormone; D004248:DNA (Cytosine-5-)-Methyltransferases; D000090205:DNA Methyltransferase 3A