Study of neuroendocrine changes in pre-puberty male rat exposed to light / 中华内分泌代谢杂志

ABSTRACT

SD male rats aged 21 days were continuously exposed to light for 30 days in order to inhibit secretion of melatonin (MT). Changes in serum MT, testosterone, corticosterone, thyroid hormones (T_ 3 , T_ 4 ), adrenalin and noradrenalin were determined. The results showed that MT inhibited the functions of gonad, adrenal and sympathetic nerve, but increased the function of thyroid in pre-puberty rats.