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Insulin regulates primordial-follicle assembly in vitro by affecting germ-cell apoptosis and elevating oestrogen.
Feng, Xin-Lei; Sun, Yuan-Chao; Zhang, Min; Cheng, Shun-Feng; Feng, Yan-Ni; Liu, Jing-Cai; Wang, Hong-Hui; Li, Lan; Qin, Guo-Qing; Shen, Wei.
Afiliação
  • Feng XL; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Sun YC; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Zhang M; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Cheng SF; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Feng YN; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Liu JC; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Wang HH; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Li L; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
  • Qin GQ; EMF Nutrition, 715 Marion Street, Winnipeg, Manitoba, R2J 0K6, Canada.
  • Shen W; Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China.
Reprod Fertil Dev ; 27(8): 1197-204, 2015 Nov.
Article em En | MEDLINE | ID: mdl-24931389
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.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Apoptose / Estradiol / Células Germinativas / Folículo Ovariano / Insulina Limite: Animals Idioma: En Ano de publicação: 2015 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Apoptose / Estradiol / Células Germinativas / Folículo Ovariano / Insulina Limite: Animals Idioma: En Ano de publicação: 2015 Tipo de documento: Article