EFFECTS OF MELATONIN ON HPA AXIS IN RATS / 解剖学报

ABSTRACT

Objective To study the functional and ultramicrostructural effects of melatonin on hypothalamus-pituitary-adrenal(HPA) axis in normal and diabetic rats.Methods By means of radioimmunoassay we observed the effects of three doses of melatonin(0.5mg/kg for low,10mg/kg for medium,50mg/kg for high) and lipoicin on level of CRH,ACTH and COR in normal and diabetic rats' plasma for three weeks respectively.The ultramicrostructural changes of hypophysis and pituitary gland after melatonin treatment were also observed under transmission electron microscope(TEM).Results 1.Compared with control groups,the CRH level of melatonin groups in normal and diabetic rats notably reduced(P