Insulin regulates primordial-follicle assembly in vitro by affecting germ-cell apoptosis and elevating oestrogen.
Reprod Fertil Dev
; 27(8): 1197-204, 2015 Nov.
Article
en En
| MEDLINE
| ID: mdl-24931389
ABSTRACT
Insulin is a protein secreted by pancreatic ß-cells, which plays an important role in the regulation of ovarian function. However, the specific molecular mechanism of its function remains largely unknown. This study aimed to assess the effect of insulin on mouse folliculogenesis using an in vitro ovary-culture model. The results demonstrated that insulin promoted the proliferation of ovarian granulosa cells in vitro, and thereby accelerated the progress of folliculogenesis (the percentage of oocytes in cysts declined from 42.6% to 29.3%); however, the percentage of apoptotic oocytes increased after insulin treatment. Further investigation indicated that apoptosis occurred mainly in germ-cell cysts. After 3 days of insulin treatment, oestrogen in the culture medium of mouse ovaries significantly increased (P<0.01), while the lower dose of oestrogen promoted primordial-follicle assembly in vitro. In conclusion, insulin promoted folliculogenesis by facilitating germ-cell apoptosis within the cysts and upregulating oestrogen levels.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Apoptosis
/
Estradiol
/
Células Germinativas
/
Folículo Ovárico
/
Insulina
Límite:
Animals
Idioma:
En
Revista:
Reprod Fertil Dev
Asunto de la revista:
MEDICINA REPRODUTIVA
Año:
2015
Tipo del documento:
Article
País de afiliación:
China