Testicular dysgenesis does not affect expression of anti-müllerian hormone by Sertoli cells in premeiotic seminiferous tubules
| Autor: | R, Rey, L, al-Attar, F, Louis, F, Jaubert, P, Barbet, C, Nihoul-Fékété, J L, Chaussain, N, Josso |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Anti-Mullerian Hormone
Male endocrine system endocrine system diseases Adolescent Disorders of Sex Development Gonadal Dysgenesis Testis Humans Child Glycoproteins Sertoli Cells urogenital system Infant Newborn Infant Seminiferous Tubules Immunohistochemistry female genital diseases and pregnancy complications Growth Inhibitors Meiosis Testicular Hormones Gene Expression Regulation Child Preschool Mutation Female hormones hormone substitutes and hormone antagonists Research Article |
| Zdroj: | The American journal of pathology. 148(5) |
| ISSN: | 0002-9440 |
| Popis: | Anti-Müllerian hormone (AMH) immunoreactivity was studied on paraffin sections obtained from archival testicular biopsies of 29 children with intersex disorders and of 22 controls. Strong AMH immunoreactivity was observed in Sertoli cell cytoplasm from 8 fetal weeks until puberty. During pubertal maturation, in both normal and intersex patients, AMH expression was present in premeiotic seminiferous tubules, but was no longer detected in neighboring tubules with meiotic development. AMH immunostaining was abolished in the testis of one patient with persistent Müllerian ducts due to a mutation of the AMH gene, but was conserved in the testes of two patients with mutations of the AMH receptor gene. Testicular dysgenesis usually results in sexual ambiguity, with low testosterone and AMH serum levels and persistence of Müllerian derivatives. AMH immunoreactivity was conserved in premeiotic seminiferous tubules of dysgenetic testes, and also in sex-cord cells of a gonadoblastoma. In patients with asymmetric gonadal differentiation, the streak gonad was AMH-negative. In conclusion, secretion of AMH is a constitutive feature of the immature Sertoli cell and its expression is altered only by mutations of the AMH gene, but not by gonadal dysgenesis. The degree of regression of Müllerian ducts and serum AMH levels reflect the number, not the functional value, of Sertoli cells present in the immature testis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|