[Comparative evaluation of the effect of serotonin, melatonin and methoxytryptamine on the content of biogenic amines in the hypothalamus and gonadotropic hormones in the pituitary gland depending on the periodicity of phases of the estrous cycle in rats].

This work is experimental and devoted to the study of functional activity of the pineal gland. The influence of the main biologically active substances (serotonin, melatonin, mexamin) produced by the epiphysis, on the hypothalamo-hypophysial structures was studied; results pointed to the significant role played by the epiphysis in the neuroendocrine regulation system.

[Biogenic amines in the epiphysis and hypothalamus under normal conditions and following ovariectomy].

Melatonin content in the epiphysis, serotonin, noradrenaline, dopamine-in the hypothalamus, gonadotropins--in the hypophysis of rats was studied under normal conditions and following ovariectomy; regularly of the estral cycle phases was studied as well. Two series of experiments were conducted on 120 rats with regular estral cycles. The animals were divided into groups according to the estral cycle phase.