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(A–D). Levels of TrkA and its phosphorylated status (pTrkA) in diabetic rat retina with or without NGF treatment. TrkA and pTrkA levels are shown in the experimental groups by Western Blot (A) and densitometric analyses (B–D). β-Actin expression was used to normalize sample variability, a.u. indicates arbitrary units. The results are expressed as mean ± SD. CTRL, healthy rats; STZ, streptozotocin; STZ+NGF, streptozotocin+nerve growth factor eye drops.
