RESUMO
Objective: To investigate the relationship between the melatonin and the development of testicle in rabbits. Methods: Thirty male rabbits (unreach puberty) were randomly divided into 2 groups:15 were actively immunized with melatonin and complete antigen, which was successfully synthesized through Mannich reaction by combining melatonin with BSA, the other 15 were taken as controls.The specific antibodies of rabbits were detected by ELISA and RIA.The serum testosterone(T) and luteinizing hormone(LH) were detected by RIA, the mass of testicle or epididymis and the number of sperm were measured. Results: The serum T and LH concentration in experiment group were significantly lower than that in the control group.The mass of testicle or epididymis and the number of sperm in experiment group were also significantly lower than that in the control group. Conclusion: The results suggest that the immunization of melatonin can block the development of testicle in male rabbits.