Effect of anti-CD90 antibody-mediated depletion of ILCs and duration of memory.
(A) A timeline for anti-CD90.2 administration. (B–G) Effect of depletion ILCs by treatment with an anti-CD90 antibody (isotype antibody as a control) on airway hyperreactivity (B), lung eosinophils (C), ICOS+ST2+ ILC2s (D), IL5+ (E), IL13+ (F), and airway inflammation (G). BM, bone marrow. ***, P < 0.0001; **, P < 0.001; *, P < 0.01, unpaired t test in Rag1−/− mice sensitized and challenged with Alt. (H–K) The duration of persistence of memory. Rag1−/− mice were exposed to Alt as per Fig. 1 A and then had a recall (R) challenge with Alt in week (W) 6, 9, or 15 (labeled as 6, 9, or 15 W-R, respectively). A control group was exposed to Sal and challenged with Sal in week 15 (Sal/Sal). The mice had measurements of airway hyperreactivity (H; two-way ANOVA), lung eosinophils (I), CD45+CD25+ICOS+ST2+ ILCs (J), and IL13+ ILC2s (CD45+CD25+ICOS+ST2+; K) as described above. ***, P < 0.0001 versus Sal/Sal (one-way ANOVA, n = 3–5/group).