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Jurkat and HUT 78 T cell lines, as well as peripheral blood human T cells activated with PHA plus PMA were used to investigate the capacity of substance P (SP) neuropeptide to regulate IL-2 production. By using Northern blot analysis and dosage of the IL-2 release in cell supernatants, we show that SP can act as cosignal with PHA + PMA to enhance the(More)
Monoclonal antibodies (Mab) were prepared against nonspecific cross-reacting antigen (NCA) and were selected on the basis of their absence of reactivity with carcinoembryonic antigen (CEA). Four Mab were found which allowed the characterization on CEA of three epitopes, defined A, B, and C. These epitopes were all located on the peptidic moiety of this(More)
An immunoenzymologic method using peroxidase-labeled antibodies has been applied for the localization of carcinoembryonic antigen (CEA) on frozen sections, on Araldite-embedded sections, and on isolated cell preparations of normal rectocolonic mucosa and of rectal and colonic cancers (adenocarcinomas and one villous tumor). CEA appears as a component(More)
Gene expression studies require a sensitive and quantitative assay of mRNA amounts present in small samples. We describe a general method of quantifying specific mRNA quickly and easily from purified RNA or directly from a few cells by PCR and enzyme-linked immunosorbent assay (ELISA) revelation of the resulting products (sensitivity of the last step: < 0.1(More)
Twenty colonic adenocarcinomas were studied by immunofluorescence with antisera against components of the basement membrane: type IV collagen, laminin and heparan sulfate-rich proteoglycan, as well as antisera against antigens of the connective tissue: type-III collagen, fibronectin and hyaluronectin. Marked alterations of the basement membranes were(More)
We studied the plasmin system with specific antisera to plasminogen, its 2 activators (urokinase-type and tissue-type) and the 2 plasmin inhibitors, alpha 2 anti-plasmin and alpha 2 macroglobulin on sections of 34 human colonic tumors by immunofluorescence. Anti-plasminogen serum showed a clear-cut reactivity at the surface of tumor cells, as it stained the(More)
We recently showed that an antibody-mediated gene transfer procedure termed antifection can be used for targeted gene delivery into lymphoid cells in vitro and in vivo. We here report that antifection also is effective for targeted gene transfer to immature hematopoietic cells. A human IL3-expressing plasmid was chemically linked to an anti-human CD117(More)
Twenty-three colonic adenocarcinomas were studied by immunofluorescence with antisera against components of the basement membrane (type IV collagen, laminin, and heparan sulfate-rich proteoglycan) as well as antisera against antigens of the connective tissue (type III collagen, fibronectin, and hyaluronectin). Marked alterations of the basement membranes(More)