Journal: Molecular Biology of the Cell
Article Title: Rab21 in enterocytes participates in intestinal epithelium maintenance
doi: 10.1091/mbc.E21-03-0139
Figure Lengend Snippet: Rab21 expression in enterocytes is required to maintain correct intestinal epithelium morphology. (A) Schematic of Drosophila midgut compartmentalization. (B–D) Intestine of a Rab21-GAL4>UAS-GFP:Rab21 WT transgenic fly. (B) Arrowheads indicate the copper cell region and the distal posterior midgut and (C) Rab21 enrichment in enterocytes. (D) Arrows show Rab21 enrichment in other Armadillo-positive (Arm + ) cell types. Images are representative of n = 15 guts. (D′, D′′) Magnifications of the areas highlighted by arrows in D. (E) In adult flies, expression of two independent Rab21 RNAi hairpins or Rab21 DN in enterocytes was achieved using Myo1A ts -GAL4. (F) Inverted binary images of Drosophila guts stained with DAPI and quantification of cell density. (G) Immunostaining for Coracle (Cora). Images are representative of n = 15–20 guts. (H) Epithelial organization of guts stained with DAPI and phalloidin. The percentages of guts with single- and multilayered epithelia are shown ( n = 14 guts). (I) Transverse views of guts stained with DAPI (blue) and phalloidin (red; to detect F-actin) with measurements of luminal areas. (J) Survival curves in controls and flies expressing Rab21 RNAi or Rab21 DN . For the LacZ, Rab21 RNAi-1, and Rab21 RNAi-2 conditions , n = 46, 75, and 47 flies, respectively. For Rab21 DN n = 30 flies. For all experiments N = 3, except for I and Rab21 DN in J, where N = 2. **** P < 0.0001 by one-way ANOVA followed by Dunnett’s test (F).
Article Snippet: Tissues were mounted in SlowFade Gold Antifade Mountant with DAPI (#S36938; Thermo Fisher Scientific).
Techniques: Expressing, Transgenic Assay, Staining, Immunostaining