ABSTRACT
Objective:To establish an in vitro capsular bag model and compare the inhibitory effects of different 360° square-edge intraocular lens (IOL) on lens epithelial cells (LECs) migration. Methods:In vitro capsular bag model with posterior capsule opacification (PCO) was established using Transwell compartment, cell climbing slices, human collagen type Ⅳ, and IOL.The models were divided into Plate-loop HydroSmart group, C-loop HydroSmart group, and C-compensation-loop Hydrophobic group according to the different square-edge IOL implanted.A blank control group was set using the Transwell compartment without IOL.The early PCO pathological manifestations in lens epithelial cell line SRA01/04 cultured in the Transwell compartment were observed with an inverted microscope.The cell morphology in different groups was observed by hematoxylin and eosin staining.The cell counting and cell migration inhibition rate of anterior capsule and posterior capsule were calculated by Transwell assay and cell-exclusion zone assay, respectively. Results:The early pathological characteristics of PCO, such as early Soemmering ring and small Elschnig pearl, could be found in cells in the in vitro capsular bag model after 48-hour culture.The migrating cells in model groups were fibrous.No changes mentioned above were found in blank control group.The number of migrating cells in the anterior capsule of Plate-loop HydroSmart group, C-loop HydroSmart group, C-compensation-loop Hydrophobic group was 18.80±5.53, 24.67±9.80, and 34.47±10.80, respectively, and the number of migrating cells in the optical area of the posterior capsule of the three groups was 56.43±9.00, 162.20±16.38, and 121.30±12.01, respectively.The cell migration inhibition rate in the anterior capsule of Plate-loop HydroSmart group, C-loop HydroSmart group, C-compensation-loop Hydrophobic group was (92.02±1.94)%, (89.76±3.10)%, (86.27±4.54)%, respectively, and the cell migration inhibition rate in optical area of the posterior capsule of the three groups was (91.60±3.65)%, (70.14±5.35)%, (78.43±3.48)%, respectively.The number of migrating cells in the anterior capsule was lower and the cell migration rate inhibition was higher in Plate-loop HydroSmart group than C-compensation-loop Hydrophobic group, with significant differences (both at P<0.05). The number of migrating cells in the optical area of the posterior capsule and the cell migration inhibition rate was greater than those of C-loop HydroSmart group and C-compensation-loop Hydrophobic group, showing statistically significant differences (all at P<0.001). Conclusions:The in vitro capsular bag model can be used in PCO research.Compared with C-loop HydroSmart IOL and C-compensation-loop Hydrophobic IOL, Plate-loop HydroSmart IOL can more effectively inhibit the migration of LECs to the optical area of the posterior capsule.
ABSTRACT
PURPOSE: To assess the effect of the remnants after lens extraction on posterior capsular opacification with lens epithelial cell culture through in vitro capsular bag model. METHODS: After isolating porcine lens capsules, sterile non-toxic PMMA (polymethyl- mathacrylate) tension ring was inserted into the capsule. These were placed in organ culture medium up to 6 weeks. The grade of cell coverage of the posterior lens capsule was recorded to check the proliferative activity. RESULTS: In the process of cell culture, outgrowth of the epithelial cells was observed across the posterior capsule after a lag period. The rate of cell coverage was dependent upon the added factors. The proliferative activity was the greatest in the group where lens cortical and nuclear materials were added, and other groups showed no difference from a control group. CONCLUSIONS: To reduce posterior capsular opacification, it is important that we should not leave the lens cortical material behind during cataract surgery.
Subject(s)
Capsules , Cataract Extraction , Cataract , Cell Culture Techniques , Epithelial Cells , Organ Culture Techniques , Polymethyl MethacrylateABSTRACT
PURPOSE: This study attempts to evaluate the effect of lens cortex and nucleus remnants on posterior capsular opacification with method of the cell culture according to in vitro capsular bag model. METHODS: After bovine lens were isolated, we performed continuous curvilinear capsulorhexis and hydrodissectioin of the lens fiber mass. At this stage a tension ring was implanted and then the preparations placed in organ culture for up to 6 weeks. Lens cortex and nucleus material was added at the culture media in group 2, 3, 4, 5, 6 with amount of 1/16, 1/32, 1/64, 1/96, 1/128 of one lens volume. Group 1 was control group that was not added lens materials. Cell coverage of the posterior lens capsule was recorded and the capsules were examined, both pre-and post-coverage, for proliferative activity. RESULTS: After a lag period outgrowth was observed across the posterior capsule. The proliferative activity was greater at the groups that were added more amount of the lens cortex and nucleus material. CONCLUSIONS: it is important that we should not remain any lens cortex material remnant at cataract surgery.