Related Experiment Videos
Cytokine involvement in oocytes and early embryos
M Zolti1, Z Ben-Rafael, R Meirom
1Chaim Sheba Medical Center, Tel Hashomer, Israel.
Fertility and Sterility
|August 1, 1991
Summary
Reproductive cytokines like IL-1, IL-6, CSF-1, and TNF are present in early human development. These molecules are sequentially expressed, suggesting a role in embryonic growth and pregnancy.
Area of Science:
- Reproductive biology
- Immunology
- Cell biology
Background:
- Early reproductive events involve complex, regulated processes.
- Cytokines, known for their effects on immune cells, may influence reproductive functions.
- Understanding cytokine presence and function is crucial for reproductive health.
Purpose of the Study:
- To quantify key cytokines in human reproductive contexts.
- To investigate the presence of interleukin 1 (IL-1), interleukin 6 (IL-6), colony-stimulating factor 1 (CSF-1), and tumor necrosis factor (TNF).
- To analyze cytokine levels in oocytes, granulosa cells, cumulus cells, embryos (1-8 cell stage), and sperm.
Main Methods:
- Samples were collected from individuals undergoing in vitro fertilization (IVF).
- Conditioned medium (CM) from various reproductive cells and embryonic stages was analyzed.
- Cytokine presence was measured using quantitative methods.
Main Results:
- Significant quantities of IL-1, IL-6, and CSF-1 were detected in the oocyte and corona-cumulus complex.
- Tumor necrosis factor (TNF) was identified later, specifically at the six to eight-cell embryonic stage.
- No inflammatory cytokines were detected in sperm samples.
Conclusions:
- These cytokines likely play a regulatory role in embryonic development.
- They may be involved in the maternal immune system's recognition of pregnancy.
- Cytokines could contribute to maintaining the necessary hormonal environment for pregnancy.