[Crossed graft of embryonic testis between quail and chick embryos: contribution to the study of the mechanism of female bird embryo masculinization].
Quail, or chick embryonic testes grafted respectively in the extraembryonic coelom of chick or quail embryos induce both a Mullerian duct regression and a masculinization of the female host gonads up to the differentiation of two testes, in some cases. Such a result confirms the fact evidenced previously in other bird species (chick and duck) that the testis-inducer is interspecific. Quail cells are not observed in histological sections of embryonic gonads of testis-grafted chicks. This allows to discard a possible influence of cells migrating from the graft to the host. The grafted testes act then through substance/s secreted in the blood stream. Present and previous experimental data strongly suggest that the same substance, i.e. the so-called anti-Mullerian hormone, is responsible for both MD regression and gonadal sex reversal.
Rashedi
M
M
Laboratoire d'Histologie et Embryologie, Faculté de Médecine Paul-Broca, Université Bordeaux II, France.
Maraud
R
R
Audine
M
M
Piet
M
M
Castet
M C
MC
D000818:Animals; D002642:Chick Embryo; D012734:Disorders of Sex Development / Q000209:etiology*; D005260:Female; D008297:Male; D009095:Mullerian Ducts / Q000473:pathology; D010053:Ovary / Q000473:pathology; D011784:Quail / Q000196:embryology*; D013737:Testis / Q000196:embryology* / Q000473:pathology / Q000637:transplantation*
Greffes croisées de testicules embryonnaires entre des embryons de Caille et de Poulet: apport à l'étude du mécanisme de la masculinisation de l'embryon femelle d'Oiseau.