Expression levels of SDF-1/CXCR4 in the facial nerve nucleus after cell transplantation. A) Statistical analysis of SDF-1 mRNA expression levels in the facial nerve nucleus. B) FNA rats were transplanted with BMSCs and monocytes, either single culture or co-culture; the expression levels of SDF-1/CXCR4 in the facial nerve nucleus were detected with the Western blot analysis, at indicated time points after cell transplantation. C,D) Statistical analysis of SDF-1 and CXCR4 expression levels in the facial nerve nucleus. NS, positive control group; BMSCs, transplanted with SPIO-GFP-BMSCs alone; co-transplantation group 1, co-transplanted with SPIO-GFP-BMSCs and monocytes at the ratio of 30:1; monocytes, transplanted with monocytes alone; and co-transplantation group 2, co-transplanted with SPIO-GFP-BMSCs and monocytes at the ratio of 1:30. Error bars denote SD.