HSPA1A and glaucoma: Quantification of the levels of Hsp27 and Hsp70 proteins in the ON at the 7d time point in the various models of RGC injury revealed highly similar results to the retina, namely that Hsp27 was significantly (P<0.05 for experimental glaucoma; P<0.01 for other models) upregulated in all four treated groups compared to the relevant controls (Fig. 3G–J).