AIM:To investigate the effects of different lighting on the reproductive system in depressive female rats.METHODS:Healthy adult female rats were randomly chosen as control group , and the depressive adult female rats in SPF grade were randomly divided into 5 groups (7 rats each):depressive model group, sulfur lamp group, heat radia-tion lamp group , fluorescent lamp group and LED lamp group .After 45 d of continuous illumination , the estrous cycle was observed by the vaginal exfoliated cells , and the organ indexes of ovary and uterus were calculated .The concentrations of estiadrol (E2), prolactin (PRL), progesterone (PROG) and testosterone (T) in the serum were detected by ELISA, and the histopathological lesion of ovary was observed under microscope with HE staining .RESULTS:The estrous cycle exhib-ited serious disorder , the ovaries exhibited serious congestion , and the organ indexes of ovary and uterus and the concentra-tions of E2 , PRL, PROG and T decreased significantly in the rats in depressive model group compared with control group (P<0.05).The estrous cycle and histopathological damage of ovary were obviously improved , and the concentrations of E2 , PRL, PROG and T were significantly increased after the sulfur lamp lighting in the depressive female rats compared with depressive model group .No obvious change and improvement of the reproductive functions in the heat radiation lamp group, fluorescent lamp group and LED lamp group was observed .CONCLUSION:The reproductive functions of depres-sive female rats are improved by sulfur lamp lighting .

Objective To investigate the effects of different lighting(sulfur lamp, heat radiation lamp, fluorescent lamp and LED lamp) on reproductive system in depressive male rats.Methods CUMS depressive model of rats was established through the stimulations of chronic unpredictable mild stress(CUMS), then they were randomly divided into 5 groups:depressive model group, sulfur lamp group, heat radiation lamp group, fluorescent lamp group and LED lamp group.After 45 d of continuous illumination, serum was collected and reproductive organs were removed from rats, then the organ index of testicle,epididymis,seminal vesicle and kidney was calculated, the concentrations of testosterone (T), estradiol (E2), prolactin (PRL) and progesterone (PROG)in the serum were detected by ELISA, the histomorphological lesion of testicle was observed under microscope with hematoxylin-eosin (HE) staining, the expression of melatonin receptors (Mel 1a), 3β-HSD and P450scc of testicle were detected by Western blot.Results The organ index of testicle, epididymis and seminal vesicle, the concentration of T, E2,PRLand PROG, and the expression of Mel 1a, 3β-HSD and P450scc in the depressive rats were significantly lower than that of the controls(P<0.05), and the seminiferous tubules of the testis of depressive rats were atrophied.However, the level of T, E2, PRL and PROG were increased,the cell morphology of the testicle was improved, and the expression of Mel 1a, 3β-HSD and and P450scc were upregulated after the sulfur lamp lighting in the depressive male rats compared with depressive model group (P<0.05).Conclusions The testis structure and functions of depressive male rats are improved by sulfur lamp lighting.