Figure 7.

Histopathological alterations and TNF-α mRNA expression before clinical onset of colitis. Day 10 after transfer of TNF+/+CD4+CD45RBhi T cells into TNF+/+RAG2−/− recipients (A and B); TNF−/−CD4+CD45RBhi T cells into TNF+/+RAG2−/− recipients (C and D); and TNF+/+CD4+CD45RBhi T cells into TNF−/−RAG2−/− recipients (E and F). A, C, and E, hematoxylin and eosin staining; B, D, and F, in situ hybridization; magnification 60.