ObjectiveTo investigate the cytotoxicity of triamcinolone acetonide (TA) on cultured human retinal pigment epithelial (RPE) cells.MethodsEffect of TA with different concentraion (0.4, 02, 01, 0.05, and 0.025 mg/ml) on the proliferation of RPE cells was detected by methyl thiazolyl tetrazolial (MTT) assay; The changes of cellular cycle treated by TA with the drug concentration of IC50 for 72 hours were measured by flow cytometry (FCM) ananlysis, and the morphological and ultrastructural changes of the cells were observed by phasecontrast microscopy and transmission electron microscopy.ResultsWith the concentration of 0.4-0.025 mg/ml, TA inhibited the growth of RPE cells obviously in a dose-dependent manner compared with the control (P＜0.05), and the cells in S phase treated with TA decreased 10.6% compared with the control (P＜0.05). Under the light microscope, sparse cells with irregular configuration and many prominences and cellular vacuoles in TA group can be seen. The results of transmission electron microscopy showed asymmetrically distributed cellular chromatin was, cavitated cytoplasm, and even some necrotic cells.ConclusionTA can inhibite the S-phase karyomitosis of RPE and inhibite the cellular proliferation; and destroye the cellular structure and lead to the necrosis, which indicates the cytotoxicity of TA on RPE.(Chin J Ocul Fundus Dis, 2005,21:233-236)
Objective To observe the expression of alpha;A-and alpha;B-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 alpha;A and alpha;B-crystallin in retina.Results The absorbance value (A value) of retina alpha;A-crystallin was 1.40573plusmn;0.70748 in the control group, and were 4.317 51plusmn;0.412 97, 7.397 08plusmn;1.947 90, 9.634 32plusmn;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 alpha;B-crystallin is 0.129 36plusmn;0.033 93 in the control group, and were 0.507 17plusmn;0.117 55, 7.345 43plusmn;2.292 97, 4.042 26plusmn;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 alpha;A and alpha;B crystallin in groups with bluelight exposure was obviously higher than that in the control group.Conclusions Blue light may up-regulate the expression of alpha;A-and alpha;B-crystallin in ratsprime; retina.
ObjectiveTo discuss the changes of joint fluid and blood-related indexes in patients with gouty arthritis and rheumatoid arthritis, and to analyze the clinical significance of these changes. MethodsSeventy-five patients with gouty arthritis and 68 with rheumatoid arthritis treated between January and December 2014 were included in our study. Their joint fluid-related indicators including white blood cell count (WBC), total protein (TP), albumin (ALB), glucose (GLU), and uric acid (UA), and their blood indicators including immunoglobulin G (IgG), immunoglobulin M (IgM), immunoglobulin A (IgA), C3 and C4, rheumatoid factor (RF), anti-streptolysin O (ASO), and c-reactive protein (CRP) were detected. ResultsFor joint fluid-related indicators, TP and ALB levels were not significantly different between the two groups (P > 0.05), while WBC, GLU, UA, RF and ASO between the two groups were significantly different (P < 0.05); For blood indexes, C4 was not significantly different between the two groups (P > 0.05), but IgG, IgM, IgA, CRP, C3, UA, RF and ASO were significantly different between the two groups (P < 0.05). The detection rate of ASO from the joint fluid was significantly higher than that detected from the blood in both the two groups (P < 0.05), while UA level was not significantly different between the joint fluid and the blood (P > 0.05). In patients with rheumatoid arthritis, RF detection rate was not significantly different between the joint fluid and the blood (P > 0.05), but it was significantly different for patients with gouty arthritis (P < 0.05). The positive rate of ASO in the blood and joint fluid of patients with gouty arthritis was respectively 38.7% and 44.0%, and it was 75.0% and 73.5% for patients with rheumatoid arthritis. UA positive rate in the blood and joint fluid of patients with gouty arthritis was 92.0% and 80.0% respectively, while it was 38.2% and 32.4% for patients with rheumatoid arthritis. RF positive rate was 33.3% and 40.0% in the blood and joint fluid of patients with gouty arthritis, while the rate was 86.8% and 91.2% for patients with rheumatoid arthritis. ConclusionThe joint fluid and blood indicators are in change in patients with gouty arthritis and rheumatoid arthritis, which has a certain clinical value in disease diagnosis and curative effect observation.