melatonin , but not other pineal indoles , also prevented sulpiride-induced prolactin secretion in pinealectomized or suprachiasmatic nuclei-lesioned and ovariectomized rats , which suggested that the pineal gland can modulate prolactin secretion by acting through a dopamine mechanism independent of hypothalamic suprachiasmatic structures .
C0038866
suprachiasmatic nuclei
C0020663
hypothalamic