ABSTRACT
Chronic central serous chorioretinopathy (CSC) usually demonstrates frequent recurrence,diffuse leakage and persistent subretinal fluid,which cannot be absorbed,thus lead to photoreceptor damage and poor visual acuity.As glucocorticoids have been implicated in the pathogenesis of chronic CSC,various anti-glucocorticoids oral drugs were used in the clinic to promote retinal fluid absorption and reduce the central retinal thickness of the macula and improve the vision outcomes.In addition,the 5α-reductase-specific inhibitor finasteride,the P450-3A4 inducer rifampicin,circadian rhythmic regulator melatonin,and systemic anti-inflammatory drug methotrexate have also been put into clinical trials for chronic CSC,and achieved certain effects.However,most of the clinical studies on these oral drugs were case reports,but not multi-center randomized clinical trials.The long-term effects of these oral drugs need to be observed and studied further.
ABSTRACT
Objective To observe the expression of αA-and αB-crystallin in retina after blue-light exposure.Methods Forty female Wistar rats were divided randomly into 4 groups:control group,and blue-light exposure for 6,12,and 24 hours groups,with 10 rats in each group.The rats in the control group were not intervened.The other three groups of rats were exposed to blue fluorescent lights for 6,12,and 24 hours respcetively.Then the rats were kept in darkness for 12 hours.The globes were enucleated after anaesthesia.The immunohistochemistry and Western blot were performed to detect the expression of αA-and αB-crystallin in retina.Results The absorbance value(A value)of retina αA-crystallin was 1.40573±0.70748 in the control group,and were 4.317 51±0.412 97,7.397 08±1.947 90,9.634 32±2.377 61,respectively in the other 3 groups;the difference among the groups was significant(F=24.569,P<0.001).The A value of retina αB-crystallin is 0.129 36±0.033 93 in the control group,and were 0.507 17±0.117 55,7.345 43±2.292 97,4.042 26±3.890 23,respectively in the other 3 groups;the difference among the groups was significant(F=40.102,P<0.001).The results of Western blot showed that the expression of αA-and αB-crystallin in groups with blue-light exposure was obviously higher than that in the control group.Conclusions Blue light may up-regulate the expression of αA-and αB-crystallin in rats' retina.