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Ординатура / Офтальмология / Английские материалы / Retinal Degenerative Diseases Laboratory and Therapeutic Investigations_Anderson_2008.pdf
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378

C. Tian et al.

thickness, Leica CM1900). Sections were fixed to poly-L-lysine coated slides and the thickness of the ONL visualized by differential interference contrast (DIC) florescence microscope (Leica, Germany) and measured (Image Pro-plus 6.0 system) in 6 fields per sample (n = 3 each time point/group). We began to pick up the sections, once we found the DiI labeled cells in the retina and through the disappearance of donor cells. To find the survival donor cells transplanted in the subretinal spaces, we picked 20 sections each eye, which is totally 300 μm distance. And we counted the survival donor cells every 4 sections of these 20 sections of each eye to get the number of survival donor cells used to compare with each group. Sections we chose to measure the ONL thickness were picked from the sections which across the optic nerve (n = 4, each eye).

43.2.5 Data Analysis

Statistical analyses were performed using SPSS 15.0 for Windows. Data were presented as mean ± standard error of the mean (SEM). Statistical analyses were made using either Student’s two-tailed t test or analysis of variance (ANOVA). Newman-Keuls procedure was used for multiple comparison analysis. Differences were considered to be significant at P 0.05.

43.3 Results

43.3.1 ERG Amplitudes and Latencies

ERG wave amplitudes: Comparison of the rSCs and rSCs+BDNF groups at 1 mon revealed that the rSCs+BDNF group had significantly greater rod-ERG b wave (151 ± 31.5 ìv vs. 137 ± 35.3 ìv, P < 0.01, n = 3) and Max-ERG b wave (203.5 ± 27.4 ìv vs. 174 ± 33.4 ìv, P < 0.01) amplitudes; both groups had significantly higher amplitudes than PBS or BDNF injected eyes. However, recordings at 2 and 3 months showed no difference between rSCs+BDNF and rSCs groups for the amplitudes of the rod-ERG b and max-ERG b waves (2 mon; 47.5 ± 24.8 ìv vs. 49 ± 21.3 ìv; 96 ± 25.1 ìv vs. 95 ± 21.3 ìv, and 3 mon; 20.8 ± 5.4 ìv vs. 17.9 ± 6.2 ìv; 32 ± 12.5 ìv vs. 29.7 ± 12.4 ìv, respectively). Both amplitudes were still significantly higher than values recorded for PBS or BNDF eyes in the first and second month (P < 0.05).

ERG wave latencies: One month after surgery the latencies of the rod-ERG b and max-ERG b waves in rSCs+BDNF eyes were shorter (P<0.05) than in rSCs eyes (92 ± 7.9 ms vs. 95 ± 12.6 ms, and 71 ± 12.5 ms vs. 75 ± 21.7 ms, respectively). Similar to wave amplitudes, at 2 and 3 months after transplantation, there is no significant difference between the latencies of the rod-ERG b and max-ERG b waves (P > 0.05) between rSCs+BDNF and rSCs (2 mon; 100.3 ± 18.4 ms vs. 99 ± 17.9 ms; 84.5 ± 33.7 ms vs. 83.2 ± 31.6 ms, and 3 mon; 114.7 ± 32.7 ms vs.