Concanavalin A

Concanavalin A is a natural product, a phytoalexin (glycan-binding protein). Concanavalin A has antitumor activity and can also induce acute liver injury.

(-)-Rasfonin is a fungal metabolite found in T. terrophilus that inhibits the proliferation of mouse splenocytes induced by concanavalin A and LPS (IC50s = 0.7 and 0.5 μg ml, respectively).

Homodestcardin is a cyclic depsipeptide fungal metabolite that has been found in T. roseum and has immunosuppressant activity. It inhibits concanavalin A-induced proliferation of isolated mouse T cells.

Plipastatin A1, a lipopeptide isolated from B. cereus, demonstrates enzyme inhibitory and immunosuppressant properties. It effectively inhibits enzymes phospholipase A2 (PLA2), phospholipase C (PLC), and phospholipase D (PLD) with half-maximal inhibitory concentrations (IC50s) of 2.9, 1.3, and 1.4 µM, respectively. Additionally, at a concentration of 100 µg/ml, plipastatin A1 inhibits lipopolysaccharide (LPS)-induced B cell blastogenesis and T cell blastogenesis triggered by concanavalin A. In vivo studies reveal that a dose of 0.1 mg/animal effectively suppresses delayed-type hypersensitivity in mice.

Soyasapogenol A shows estrogenic and hepatoprotective activities, it directly prevents apoptosis of hepatocytes, and secondly, inhibits the elevation of plasma TNF-α±, which consequently resulted in the prevention of liver damage in the concanavalin A-induced hepatitis model.

Pd-C-II has anti-inflammation activity, it can inhibit TNF-α production and iNOS protein expression and inhibit COX-2 protein expression in LPS-stimulated RAW 264.7 cells. Pd-C-II inhibits anaphylactic mediator release from purified mast cells induced by

Concanamycin C, a natural macrolide antibiotic, was initially isolated from Streptomyces and identified as an inhibitor of T-cell proliferation in response to concanavalin A (1,2). It exhibits cytotoxicity to fungi, including yeasts, by inhibiting vacuolar-type ATPases (3,4).