Loss of mucus granules and ultrastructural damage to theca in goblet cells of CTαIKO mice. (A) Representative Alcian blue/periodic acid–Schiff staining in colons from control mice and CTαIKO mice. (B) Representative transmission electron micrographs of goblet cell theca in the colons of control mice and CTαIKO mice. (C) Pathology score for goblet cell depletion in the colons of control mice and CTαIKO mice (n = 10–11/group). (D) The mRNA abundance of Muc2, Tff3, and Agr2 in the colons of control mice and CTαIKO mice (n = 10/group). (E) The mRNA abundance of enteroendocrine cell markers in the colons of control mice and CTαIKO mice (n = 5/group). (F) The mRNA abundance goblet cell maturation factors in the colons of control mice and CTαIKO mice (n = 5/group). Values are means ± SEM. ∗P < .05, ∗∗P < .01, and ∗∗∗P < .001, ∗∗∗∗P < .0001.