Experimental study. Twenty-four Brown Norvy (BN) rats after
photocoagulation were randomly divided into 3 groups as
GM6001 group,
DMSO group and CONT group.
GM6001 (0.2 ml of 0.1%
suspension) was injected retrobulbar for
GM6001 group and 0.2 ml
DMSO was injected for
DMSO group on days 1, 3, 6, 9, and 12 after
photocoagulation. No injection was performed in the CONT group. Fundus fluorescence angiography, histopathology, immunohistochemistry and quantitative analysis of
choroidal neovascularization (CNV) were performed 3 weeks after
photocoagulation. One-way ANOVA was used in conjunction with SNK-t test to assess statistical significance within groups.
RESULTS: The
fluorescein leakage appeared in all three groups; but
fluorescein leakage of
GM6001 group (74.56 ± 2.33) was less than that of
DMSO group (119.57 ± 1.15)and CONT group (122.36 ± 2.38) (F = 403.23, P = 0.001;
LSD-t test, all P value < 0.01), whereas
fluorescein leakage of
DMSO group was similar to that in the CONT group. The
retinal and choroidal capillaries in the CONT group were damaged and disordered; a great deal of CNV and migration and proliferation of retinal pigment epithelium cells, fibrocytes and
collagen fibers were discovered. Pathological changes in
DMSO group were similar to those in the CONT group. There were a small quantity of retinal pigment epithelium cells, fibrocytes and CNV in
GM6001 group. Although the immunohistochemical staining for CD105 displayed positive results in all three groups, positive staining of
GM6001 group (19.85 ± 1.59) was significantly less than that of the CONT group (38.02 ± 2.57) and
DMSO group (39.02 ± 3.12) (F = 55.57, P = 0.001;
LSD-t test, all P value < 0.01). Positive staining of CD105 in the CONT group was similar to that of
DMSO group (P > 0.05). The size of CNV in
GM6001 group (15.35 ± 0.77) was significantly less than that of CONT group (28.38 ± 1.60) and
DMSO group (28.74 ± 1.19) (F = 114.85, P = 0.001;
LSD-t test, all P value < 0.01). There was no statistical difference for the size of CNV between CONT group and
DMSO group (P > 0.05).
CONCLUSION: