Effect of neutralizing sera on factor X-mediated adenovirus serotype 5 gene transfer

The deployment of adenovirus serotype 5 (Ad5)-based vectors is hampered by preexisting immunity. When such vectors are delivered intravenously, hepatocyte transduction is mediated by the hexon-coagulation factor X (FX) interaction. Here, we demonstrate that human sera efficiently block FX-mediated cellular binding and transduction of Ad5-based...

Inhibiting interleukin-1 and tumor necrosis factor-α does not reduce induction of plasminogen activator inhibitor type-1 by endotoxin in rats in vivo

In experimental animals and humans, intravenous (IV) injection of endotoxin induces large increases in circulating plasminogen activator inhibitor type-1 (PAI-1), a major inhibitor of blood fibrinolysis. A similar increase is seen after the injection of interleukin-1 (IL-1) or of tumor necrosis factor-α (TNF-α), suggesting that these cytokines...

Immunological characterization of plasminogen activator activities in human tissues and body fluids

Human plasminogen activators were compared immunologically in both a double-diffusion technique and quenching experiments on the fibrinolytic activities of the activators. Antisera against HMW and LMW urokinase and an antiserum against highly purified tissue plasminogen activator from human uterus were used. It was found that uterine tissue...

Demonstration of two forms of A2-antiplasmin in plasma by modified crossed immunoelectrophoresis

A procedure to demonstrate two forms of ??2-antiplasmin in plasma, a plasminogen-binding and a non-plasminogen-binding one, is described. The procedure involves crossed immunoelectrophoresis using antiserum against ??2-antiplasmin, with, in the first dimension electrophoresis, lys-plasminogen added to the plasma and the agarose gel. A discrete...

The expression of histocompatibility-2 antigens on hemopoietic stem cells

Antisera directed against histocompatibility-2 antigens of the mouse suppress the formation of spleen colonies by pluripotent hemopoietic stem cells. Of antisera which are specific for subregions of the H-2 complex, only those which contain anti-H-2K or anti-H-2D activity are effective. Specific anti-Ia sera do not react with the stem cell. If...

Inhibition of MLC responder and stimulator function with allo-antisera in rhesus monkeys

Ten antisera containing antibodies directed against specificities controlled by the Ia1 locus of rhesus monkeys were tested for their ability to inhibit the MLC reaction. In cultures with responding cells from the serum producer, all sera with anti-Ia1, activity depressed the stimulatory capacity of cells carrying the Ia1 antigen in question. In...