Fig. 6From: Intravenous infusion of small umbilical cord mesenchymal stem cells could enhance safety and delay retinal degeneration in RCS ratsStatistical analysis of the expression level of cytokines in the serum of RCS rats. a and b ELISA showed that the level of IL-6 in serum significantly decreased at 7 d after transplantation (n = 3) and that the level of IL-10 displayed an increasing trend. c-f The levels of BDNF, CTNF and bFGF were significantly upregulated after cell infusion at 14 d and 28 d after transplantation and that of HGF was not significantly changed (n = 3). *P < 0.05; **P < 0.01 versus UCMSCs; #P < 0.05; ##P < 0.01 versus S-UCMSCsBack to article page