Alterations in reproductive function in SRC tyrosine kinase knockout mice

Area of Science:

• Reproductive Biology
• Molecular Endocrinology
• Genetics

Background:

• Src tyrosine kinase plays a role in cellular signaling pathways.
• Its specific function in female reproduction is not fully understood.

Purpose of the Study:

• To investigate the role of Src tyrosine kinase in female reproductive processes.
• To determine the impact of Src deficiency on fertility, estrous cycles, and follicle development in mice.

Main Methods:

• Utilized Src wild-type, heterozygous, and knockout mouse models.
• Monitored estrous cycles, vaginal opening, and follicle development.
• Administered equine chorionic gonadotropin (eCG) and human chorionic gonadotropin (hCG) to assess ovulation.
• Measured serum levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH).

Main Results:

• Src knockout mice were infertile with variable and altered estrous cycles.
• Follicle development was compromised, showing reduced large pre-antral and antral follicles.
• Corpora lutea were absent, but ovulation occurred after eCG and hCG administration.
• Serum LH and FSH levels were comparable between wild-type and knockout females.

Conclusions:

• Female Src knockout mice are infertile.
• Infertility is attributed to impaired follicle development and anovulation.
• Src tyrosine kinase is essential for normal female reproductive function.