Bafilomycin B1, a macrolide antibiotic isolated from Streptomyces sp, acts as an inhibitor of K+-dependent ATPase of E. coli. It also inhibits Gram-positive bacteria and fungi.
Jujubosides have hypnotic effect on normal rats, may be influenced by circadian rhythm and the serotonergic system may involve in the hypnotic effect of jujubosides, jujubosides may be good source of lead compounds for novel hypnotics.
Enniatin B1 crosss the blood-brain barrier. Enniatin B1 decreases the activation of ERK (p44 p42). Enniatin B1 inhibits moderately TNF-α-induced NF-κB activation.Enniatin B1 is a Fusarium mycotoxin. Enniatin B1 inhibits acyl-CoA: cholesterol acyltransferase (ACAT) activity with an IC50 of 73 μM in an enzyme assay using rat liver microsomes.
Thromboxane B2 (TXB2) is released in substantial quantities from aggregating platelets and metabolized during circulation to 11-dehydro TXB2 and 2,3-dinor TXB2. In rats and rabbits, 2,3-dinor TXB1 has been identified as another urinary metabolite of TXB2. However in human urine, only trace amounts of 2,3-dinor TXB1 have been identified. In rats, 2,3-dinor TXB1 is excreted at a much higher rate than 2,3-dinor TXB2 (19.2 ± 4.9 ng/24 hr and 1.6 ± 0.3 ng/24 hr, respectively). Therefore, urinary 2,3-dinor TXB1 is a suitable marker of thromboxane biosynthesis in rats.
Thielocin B1 is a protein-protein interaction inhibitor of PAC3 homodimer. Thielocin B1 was isolated as a novel phospholipase A2 inhibitor from the fermentation broth of Thielavia terricola RF-143.
Polymyxin B1, a potent antimicrobial lipopeptide derived from Bacillus polymyxa, has potential for treating multidrug-resistant Gram-negative bacterial infections.