Relationship of age and season and consumption of Senecio vulgaris to LH/hCG receptors in the stallion testis.

The study seeks to understand the effect of age, season, and consumption of a plant named Senecio vulgaris, on the LH/hCG receptors in the testes of stallions. Main findings of the research are that the concentration of LH/hCG receptors rises with age and consumption of Senecio vulgaris significantly lowers the number of these receptors.

Research Methodology

• Testes were taken from a total of 70 colts and stallions, with ages ranging from 4 months to 23 years.
• Specimens were grouped according to age in order to evaluate the relationship between age and the receptors’ kinetics.
• Pooled samples were also used to evaluate potential seasonal impact.
• Lastly, samples taken from 5 stallions that consumed Senecio vulgaris prior to death were used to determine the plant’s effects.

Key Findings

• Analysis showed an increase in the receptor concentration (Rt) from 0.069 x 10(-11) M/mg in 4-14-month-old samples to 0.464 x 10(-11) M/mg in samples from 2-3-year-old animals, suggesting that the receptor count increases with age.
• It was also found that testicular size increases ten times alongside the increase in receptor number, therefore significantly enhancing the number of receptors per testis.
• Despite the significantly higher receptor concentration in stallions older than 5 years (1.237 x 10(-11) M/mg), no changes were observed in the binding affinities (Ka).
• The study could not establish any seasonal effect, based on similar receptor concentration and binding affinities in the winter and summer months.
• Results from analyzing stallions that consumed Senecio vulgaris showed a drastic decrease in both receptor concentration and binding affinity. The receptor count decreased to just 2.7%, while binding affinity dipped to less than 10% of normal levels.

Implications of the Study

• The study effectively offers an insight into how age, season, and diet can influence the reproductive functions in stallions, most likely through their effect on the LH/hCG receptors in the testes.
• The findings particularly raised concern about the consumption of Senecio vulgaris, indicating that stallions eating this plant, even in non-lethal quantities, could potentially have compromised reproductive functions due to its impact on LH/hCG receptor concentration and binding affinity.