Clinical application of visual quality analysis in cataract patients / 中南大学学报(医学版)

Cataract is a major cause of blindness and vision impairment disease, and the main therapy for cataract is operation. For improving the postoperative efficiency, cataract surgery has gradually transformed from traditional restorative surgery to refractive surgery with modern technique. Visual quality is one of the crucial indicators for assessing imaging quality and surgical efficiency in cataract patients. Although several instruments are available, each has its advantage and disadvantage. In the clinic, the optimum visual quality analysis methods should be selected according to the principle, function and clinical significance to meet the practical needs of different cataract patients.

Study of progress of autophagy in glaucoma and retinal degeneration / 国际眼科杂志(Guoji Yanke Zazhi)

Autophagy, a cellular housekeeping process, is indispensable to controlling the homeostasis of cytoplasm by removing unused proteins and damaged cell organelles. This process involves different types of human diseases, including cancers, neurodegenerative diseases and infectious diseases. Neurodegeneration is a critical pathological process of many eye diseases, such as glaucoma and age-related macular degeneration. The retina and all intraocular cells are constantly exposed to environmental stress and injuries, including oxidative stress and starvation, which lead to autophagy. Autophagy promotes cell survival through the recycling of metabolic precursors, or promotes cell death if autophagy is over-active. Additionally, autophagy and apoptosis have been shown to be harmonious or contrasting, depending on different experimental contexts. All of this contributes to the pathogenesis of many diseases. This paper reviews the mechanisms and regulation involved in autophagy, current understandings of neuronal autophagy in glaucoma and retina and strategies for therapeutic modulation.

Application of Icare rebound tonometer in children after congenital cataract surgery / 中南大学学报(医学版)

OBJECTIVE@#To compare the difference in intraocular pressure (IOP) readings as well as the tolerability between Icare rebound tonometer (Icare RBT) and Goldmann applanation tonometer (GAT), and to evaluate the application of Icare RBT in monitoring the intraocular pressure in children after congenital cataract surgery.@*METHODS@#The IOP was measured with the Icare RBT and GAT respectively in 150 children (262 eyes) after congenital cataract surgery by two experienced ophthalmologists. Correlation and Bland-Altman analysis were used to assess the agreement in IOP readings between the two instruments. The influence of the central corneal thickness (CCT) adjusted for age on IOP readings was analyzed by linear regression analysis. The tolerance of the patients to Icare RBT and GAT measurement were surveyed.@*RESULTS@#The mean age was (44.82 ± 11.56) months in 150 children, including 81 boys and 69 girls. The mean IOP readings by the Icare RBT and GAT were (16.08 ± 5.72) mmHg and (14.17 ± 5.05) mmHg, respectively. The mean difference between the Icare RBT and GAT was (1.91 ± 2.04) mmHg, which was significantly correlated with CCT (r=0.409, P<0.001). The IOP readings by Icare RBT was significantly correlated with that measured by GAT(r= 0.936, P<0.001). The 95% confidence interval of the difference between the two instruments was ?2.10 to 5.91 mmHg. The Icare RBT examination was well tolerated by the children compared to the GAT examination.@*CONCLUSION@#The Icare RBT is easy to use and well tolerated by the children after congenital cataract surgery. Compared to GAT, the value measured by the IOPs trends to be overestimated. The difference in readings between the 2 tonometers will magnify with the increase in CCT.

Ultraviolet radiation-induced apoptosis in human lens epithelial cells and its effect on Bcl-2 and Bax / 中南大学学报(医学版)

OBJECTIVE@#To explore the apoptosis-inducing effect of ultraviolet(UV) radiation on human lens epithelial cells (HLEC), with particular focus on changes in Bcl-2 or Bax expression as possible mechanisms.@*METHODS@#All experimental groups were exposed to the same UV light source. HLEC were divided into 6 groups according to duration of UV radiation : 0 min group (control group), 5 min group, 10 min group,15 min group, and 30 min group. Analysis on apoptosis of HLEC was performed by flow cytometry analysis (FCA, Annexin V + PI staining). Changes of Bax and Bcl-2 expression in HLEC were detected by hybridization in situ.@*RESULTS@#Apoptosis in HLEC increased with UV exposure time. The expression level of Bax mRNA was increased with the increase of UV exposure time, whereas the expression level of Bcl-2 mRNA decreased with the increase of UV exposure time. The proportion of apoptotic cells was negatively correlated with ratio of Bcl-2/Bax (r=-0.874, P<0.05).@*CONCLUSION@#UA radiation can induce apoptosis of HLEC in vitro. Bcl-2 and Bax genes may play an important role in regulating this apoptotic process.

Effect of ultraviolet radiation on ALDH1 expression in human lens epithelial cells / 中南大学学报(医学版)

OBJECTIVE@#To determine the apoptosis-inducing effect of ultraviolet light (UV) on human lens epithelial cell (HLEC) and to explore the involvement of changes in ALDH1 folowing UV radiation.@*METHODS@#HLEC was exposed to the same UV light source and was subsequently divided into 6 groups according to UV radiation time of 0 (control group), 5, 10, 15, and 30 min. Apoptosis was detected by AO/EB staining. Changes of ALDH1 in HLEC were detected by immunohistochemical staining and Western blot.@*RESULTS@#The intensity of immunohistochemical staining and the rate of positive cells decreased with increase of UV time (P<0.05). The rate of positive ALDH1 cells was negatively correlated with the rate of apoptosis (r= -0.92, P<0.05). Western blot showed the integrated absorbance values significantly decreased with the increase of UV time (P<0.05).@*CONCLUSION@#ALDH1 in HLEC decreases with an increase of UV exposure, which may be related to UV induced apoptosis of HLEC.

Application of PBL+LBL Double-track Mode in Ophthalmology Teaching / 中华医学教育探索杂志

Objective:To investigate the effect of PBL+LBL double-track mode in Ophthalmology teaching.Methods:121 students were divided into two groups.Trial group practiced PBL+LBL double-track teaching,while control group practiced LBL teaching.Results:The results of exam showed that the students in trial group had a significant higher score in sum score and analysis subjects than those in control group(P

Effects of diclofenac sodium combined with dionine in cases with fibrinous membrane after intraocular lens implantation / 中南大学学报(医学版)

Objective　The effects of diclofenac sodium(DFNa) combined with dionine in cases with fibrin exudation membrane on intraocular lens (IOL) were studied. Methods　Thirty-two eyes, derived from sixteen adult pure bred New Zealand rabbits, were divided at random into two groups after extracapsular lens extraction with posterior chamber IOL implantation: (1) rabbits received DFNa eyedrops combined with dionine eyedrops; (2) rabbits received Pred forte eyedrops. The sum of fibrinous exudation membrane on IOL was observed on 1,3,5,7,14,21,30d postoperation. Results　The fibrin exudations in the DFNa combined with dionine group is less than the pred forte group (P>0.05). Conclusion　DFNa combined with dionine is effective in treating fibrin exudation membrane after extracapsular lens extraction and IOL implantation, and it is more effective than the pred forte.

The effect of hypoxia on proliferation of cultured bovine retinal pigment epithelial cells and expression of the antiapoptotic protein bcl-2 / 中华眼底病杂志

Objective To study the effect of hypoxia on proliferation of cultured bovine retinal pigment epithelium (RPE) cells and expression of the antiapoptotic protein bcl-2. Methods The bovine RPE cells were cultured under normal and hypoxic chamber respectively. After 24 hours, the proliferation of RPE cells was evaluated by[3-(4,5-dimethylthiazole-2yl)-2,5-diphenyl tetrazolium bromide, MTT]-test. At the same time, anti-bcl-2 protein antibody was examined by immuno-histochemistry method. Results The A value in the hypoxia group was higher than that in the normal group after 24 hours (P