CD4 and neoplasm: Next, we investigated the antigen specificity of the TSLP-stimulated Th2 cell responses by transferring either OVA-specific CD4+ T cells from OTII Rag2KO mice (test; Barnden et al., 1998) or TslprKO CD4+ T cells (control) into Tslptg TslprKO mice that were then implanted with primary PyMtOvatg TslprKO or PyMt TslprKO tumor cells.