IMMUNOLOGY Correction for “Cancer-associated epithelial cell adhesion molecule (EpCAM; CD326) enables epidermal Langerhans cell motility and migration in vivo,” by Maria R. Gaiser, Tim Lämmermann, Xu Feng, Botond Z. Igyarto, Daniel H. Kaplan, Lino Tessarollo, Ronald N. Germain, and Mark C. Udey, which appeared in issue 15, April 10, 2012, of Proc Natl Acad Sci USA (109:E889–E897; first published March 12, 2012; 10.1073/pnas.1117674109).
The authors note that Fig. 1 and its corresponding legend appeared incorrectly. The corrected figure and its corrected legend appear below. This error does not affect the conclusions of the article.
Fig. 1.
Characterization of EpCAM-deficient LC in LC/EpCAM-cKO mice. (A) Demonstration in situ via immunofluorescence microscopy of EpCAM deletion in LC in LC/EpCAM-cKO mice. Epidermal sheets from LC/EpCAM-cKO (KO) and Cre-negative (WT) animals were stained with anti-EpCAM and anti-MHC Class II mAb and visualized using immunofluorescence microscopy. (Scale bar: 50 μm.) Note residual EpCAM expression in hair follicles in WT and KO mice. (B) Demonstration via flow cytometry of EpCAM deletion in LC in LC/EpCAM-cKO mice. Flow cytometric analysis of CD45+ MHC Class II+ Langerin+ cells (LC) and CD45− MHC Class II− cells (KC) in epidermal cell suspensions from LC/EpCAM-cKO (KO) and WT animals. n = 3 mice per group in three experiments; thick line, KO; WT, thin line, WT; gray line with shading, isotype control. EpCAM expression levels are depicted as geometric mean fluorescence intensities (MFI). (C) LC densities in LC/EpCAM-cKO mice. LC were enumerated by counting MHC Class II+ cells in epidermal sheets from KO and WT mice (10 random fields per mouse, 3–4 mice per group). Data presented are representative of three experiments. (D) T-cell–stimulatory activity of EpCAM-deficient LC. Epidermal cells from KO and WT mice were cocultured with MHC-mismatched (BALB/c) naive T cells (n = 3 mice per group in three experiments using triplicate measurements in each experiment). Numbers of LC per well were determined using flow cytometry to assess LC frequencies in epidermal single-cell suspensions. T-cell proliferation was measured by quantifying cleavage of WST-1 using a spectrophotometric assay.