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Insulin modifies the proliferation and function of chicken testis cells
R J Bobes1, J I Castro, C Miranda
1Departamento de Fisiología, Biofisica y Neurociencias, CINVESTAV, Mexico, DF.
Poultry Science
|May 25, 2001
Summary
Insulin influences chick testis cell activity and proliferation. It enhances androgen production in newly hatched chickens and increases embryonic cell proliferation, suggesting a key role during the perinatal period.
Area of Science:
- Reproductive biology
- Endocrinology
- Developmental biology
Background:
- Insulin is a key metabolic hormone with known extragonadal effects.
- The role of insulin in avian testicular function, particularly during development, is not fully understood.
Purpose of the Study:
- To investigate the role of insulin in regulating androgen production and cell proliferation in chick testis cells.
- To determine if insulin affects the response of chick testis cells to human chorionic gonadotropin (hCG).
Main Methods:
- Testis cells from 18-day-old chick embryos and newly hatched chickens were cultured.
- Cells were treated with varying concentrations of insulin and/or hCG.
- Androgen production was measured using radioimmunoassay.
- Cell proliferation was assessed using 3H-thymidine incorporation.
Main Results:
- Insulin modified the hCG-induced androgen production in embryonic chick testis cells.
- Insulin significantly increased androgen production in cells from newly hatched chickens.
- Insulin treatment led to a significant increase in the proliferation of embryonic testis cells.
- Prolonged exposure to insulin and hCG resulted in downregulation of the hCG effect.
Conclusions:
- Insulin plays a significant role in both the proliferation and androgen production of chick testis cells during the perinatal period.
- Insulin modulates the responsiveness of chick testis cells to hCG, impacting androgenic activity.
- These findings highlight insulin as a crucial factor in avian testicular development and function.
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