Fig. 6.
Intracellular sequestration and aggregation of the chemokine receptor Cxcr4 and its ligands, Cxcl14 and Cxcl12, in motoneurons of SLICK-H::Ranbp2flox/flox mice. (A,B) Representative images of Cxcr4, Cxcl14 and Cxcl12 subcellular localizations in YFP+ motoneurons in different genotypes. +/+ mice have weak immunostaining and a diffuse cellular distribution of Cxcr4 and Cxcl14 (A,a-e) and Cxcl12 (B,a-e) in YFP+ motoneurons of the anterior horn, whereas there is intracellular colocalization, sequestration and aggregation of Cxcr4 with Cxcl14 (A,f-j) and Cxcl12 (B,f-j) in YFP+ motoneurons of −/− mice. (f′-j′) Magnified images of the outlined regions indicated in f-j. (C) There are no signs of overt glyosis and microglia activation in the anterior horns at d10 (day 10) post-tamoxifen administration, as shown by the absence of GFAP+ and Cd11b+ immunostaining between genotypes. Scale bars: 25 µm. −/−, SLICK-H::Ranbp2flox/flox; +/+, SLICK-H::Ranbp2+/+. Arrows indicate intracellular aggregate or deposit foci.