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The ultrastructure of the Guérin tumour T-8 is described. Although this transplantable tumour has its ancestry in an uterine adenocarcinoma, there is no more evidence of gland formation. Desmosomes, or any other form of cell attachment organelle, were totally absent.
View Article and Find Full Text PDFColon biopsies from 37 young patients with active ulcerative colitis (UC) were investigated by electron microscopy with special regard to the inflammatory infiltrate of the lamina propria mucosae, which is characterized by lymphocytes, macrophages and plasma cells. There are close topographical relations between plasma cells and other inflammatory cells. In particular, different forms of plasma cells occur, which mainly differ in shape and contents of their rough endoplasmic reticulum (RER).
View Article and Find Full Text PDFThe endothelial and sub-endothelial lesions during early stages of experimental atherogenesis and scurvy have been studied by means of scanning EM and transmission EM, making use also of the Con-A reaction. The surface coat modifications were accompanied by formation of vacuoles in the endothelial cells and by sub-endothelial 'oedema', not only in rabbits fed a hypercholesterolic diet but also in scorbutic guinea pigs. The endothelial lesions were sometimes found even before clear modifications of the Con-A surface reactive layer were apparent.
View Article and Find Full Text PDFThe regional lymph nodes of the parotid gland of rats were examined histologically. The nodes were removed from untreated animals or rats given instillations of BSA or saline into the parotid duct. Anti-BSA antibodies were assessed in the saliva and serum.
View Article and Find Full Text PDFTumour formation from single or repeated small i.v. tumour cell doses was studied in a syngeneic tumour-host system.
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