Forodesine (BCX-1777; ImmH; Immucillin-H) is an orally active, tight-binding (bovine/human PNP Ki = 23/72 pM) and highly potent purine nucleoside phosphorylase (PNP, PNPase) inhibtor (IC50 in nM = 0.48/mouse, 0.66/monkey, 1.19/human, 1.24/rat, 1.57/dog) that mimics the PNP transition-state structure. Forodesine inhibits human T-cell proliferation stimulated by IL-2, MLR- and PHA in cultures (IC50 in the presence of 10 μM dGuo = 60, 50, and 387 nM, respectively) and shows in vivo efficacy in a xenogeneic graft vs. host disease model using hu-PBL SCID mice (20 mg/kg b.i.d. p.o.).
Genetic defects in human purine nucleoside phosphorylase cause T-cell deficiency as the major phenotype. It has been proposed that efficient inhibitors of the enzyme might intervene in disorders of T-cell function. Compounds with features of the transition-state structure of purine
Physical or mental stress leads to neuroplasticity in the brain and increases the risk of depression and anxiety. Stress exposure causes the dysfunction of peripheral T lymphocytes. However, the pathological role and underlying regulatory mechanism of peripheral T lymphocytes in
Immucillins ImmA (IA), ImmH (IH) and SerMe-ImmH (SMIH) are synthetic deazapurine nucleoside analogues that inhibit Leishmania (L.) infantum chagasi and Leishmania (L.) amazonensis multiplication in vitro without macrophage toxicity. Immucillins are compared to the Glucantime standard drug in the chemotherapy
Forodesine, a purine nucleoside phosphorylase inhibitor, displays in vitro activity in chronic lymphocytic leukemia (CLL) cells in presence of dGuo, which is the basis for an ongoing clinical trial in patients with fludarabine-refractory CLL. Initial clinical data indicate forodesine has
T cells undergo metabolic rewiring to meet their bioenergetic, biosynthetic and redox demands following antigen stimulation. To fulfil these needs, effector T cells must adapt to fluctuations in environmental nutrient levels at sites of infection and inflammation. Here, we show
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