Asociación entre receptores de leptina en testículo, niveles de leptina y testosterona en terneros púberes

in calves and study the possible association between the expression of the testicles and the levels of leptin (L) and testosterone. Materials and methods. During 7 months every two weeks on six Holstein x Zebu calves, concentrations of testosterone and L were measured by RIA. They were castrated unilaterally according to their peribubertal periods in order to study by RT-PCR the expression of the L receptor isoforms. The statistical analysis was done with the Statistica® program. Results. The levels of testosterone were