Toxicology of FK-506 in the Lewis rat.

Intra-CA1 administration of FK-506 (tacrolimus) in rat impairs learning and memory in an inhibitory avoidance paradigm

Objective(s): Calcineurin (CN) is a main phosphatase and a critical regulator of cellular pathways for learning, memory, and plasticity. The FK-506 (tacrolimus),a phosphatase inhibitor, is a fungal-derived agent and a common immune suppressant extensively used for tissue transplantation. To further clarify the role of CN in different stages oflearning and memory the main aim of this study was t...

The use of FK-506 for small intestine allotransplantation. Inhibition of acute rejection and prevention of fatal graft-versus-host disease.

Small intestine allotransplantation in humans is not yet feasible due to the failure of the current methods of immunosuppression. FK-506, a powerful new immunosuppressive agent that is synergistic with cyclosporine, allows long-term survival of recipients of cardiac, renal, and hepatic allografts. This study compares the effects of FK-506 and cyclosporine on host survival, graft rejection, and ...

FK 506 reverses acute graft-versus-host disease after allogeneic bone marrow transplantation in rats.

Severe graft-versus-host disease was induced by transplantation of ACI rat bone marrow and spleen cells into irradiated Lewis rat recipients. Treatment with FK 506 or cyclosporine A (CsA) was started after clinical and histologic evidence of acute GVHD was present. A 14-day course of FK 506 at 1.0 mg/kg/day could rescue 100% of the animals suffering from GVHD. In contrast only one half of the a...

Pretransplant xenogeneic blood transfusion combined with FK 506 prolongs hamster-to-rat liver xenograft survival.

I T IS KNOWN that donor-specific transfusion (DST) enhances graft survival in clinical transplantation. However, efforts using xenogeneic DST to improve xenograft survival have resulted in hyperacute rejection (HAR) even in the presence of conventional immunosuppression. 1 In this study. we tested the effect of DST combined with FK 506 on survival of hamster-to-rat liver xenografts. L VG hamste...

The effect of FK 506 and CyA on the Lewis rat renal ischemia model.