Fig. 5From: Intra-amniotic transplantation of brain-derived neurotrophic factor-modified mesenchymal stem cells treatment for rat fetuses with spina bifida apertaEngrafted BDNF-BMSCs expressed the marker protein K19 of epidermal cells. A–B. Double immunofluorescence staining of GFP and K19 in frozen sections of rat fetuses with intra-amniotic transplanted BMSC and BDNF-BMSC engrafted. The white box was enlarged on the right side with three color channels. The representative double-positive cells are marked by arrows. Scale bar: 25 μmBack to article page