Effect of 137Cs gamma radiation on the fibronectin content in basement membrane of mouse small intestine.

The distribution of fibronectin in the small intestine of the mouse was investigated using an indirect immunofluorescence technique. Tissue fibronectin was preferentially located in the basement membrane and in the muscularis layer. Semiquantitative immunofluorescence determination of tissue fibronectin in the basement membrane showed only minor changes at 24 or 48 hours after 10 or 20 Gy of 137Cs gamma irradiation.