Decoyinine (Angustmycin A)

Cell experiment:

The isogenic strains WLN-4 (sacA321 amyRJ-amyE+) and WLN-11 (sacA321 gra-10-amyE+) are inoculated into minimal S7 medium, containing 2% (wt/vol) glucose, from washed exponential-phase seed cultures grown in the same medium. At mid-logarithmic growth phase, each culture is evenly subdivided into two flasks containing either 1/10 the culture volume of fresh S7 medium or a 1/10 volume of filter-sterilized S7 medium to which 2.5 mg of Decoyinine per ml has previously been dissolved (final Decoyinine concentration, 250 μg/mL). At regular intervals before and after the decoyinine addition, samples are removed from the cultures and the culture supernatants are assayed for a-amylase as described previously. At 16 h after the Decoyinine addition, the frequency of heatresistant spores in each culture is determined[2].

Animal experiment:

Mice[1]SK-Mel-103 and SK-Mel-28 cells are inoculated subcutaneously in both flanks of SCID mice (18 mice/cell line). Once tumors volume reach approximately 100 mm3, mice are randomly assigned to one of four groups and treated with daily i.p. injections of Decoyinine (120 mg/kg), MMF (30 mg/kg), or with respective vehicles. Tumor size is measured every other day with a caliper and mice are killed once tumor volume reach 1000 mm3 or the animals show signs of morbidity[1].

References:

[1]. A Bianchi-Smiraglia, et al. Pharmacological targeting of guanosine monophosphate synthase suppresses melanoma cell invasion and tumorigenicity. Cell Death Differ. 2015 Nov; 22(11): 1858–1864.
[2]. W L Nicholson, et al. Effect of Decoyinine on the regulation of alpha-amylase synthesis in Bacillus subtilis. J Bacteriol. 1987 Dec; 169(12): 5867–5869.