Figure 7  .

Effects of butyrate treatment on established colitis. Haematoxylin and eosin stained (A, B) paraffin sections of colon of rats with trinitrobenzene sulphonic acid (TNBS) induced colitis receiving isotonic saline (A) or 100 mM butyrate (B) enemas for two weeks. Magnification, ×200. Immunofluorescence staining (C, D) of paraffin sections of colon of rats with TNBS induced colitis receiving isotonic saline (C) or 100 mM butyrate (D) with a monoclonal antibody specific to the activated form of nuclear factor kappa B. Magnification, ×300.