Sandramycin

Sandramycin ia a cyclic depsipeptide antibiotic isolated from cultured broth of a Nocardioides sp. Sandramycin is also a DNA intercalator that potently binds DNA and is an ADC cytotoxin. Sandramycin is active against Gram-positive bacteria and has potent antitumor activity^[1][2][3]. In Vitro: Sandramycin has antimicrobial activity wtih MIC values of 0.024 μg/mL, 0.012 μg/mL, 0.012 μg/mL, 0.098 μg/mL, 0.024 μg/mL, 12.5 μg/mL and 12.5 μg/mL for Bacillus subtilis (Rec⁺) A22508-2, B. subtilis (Rec^-) A22509-2-2, Staphylocccus aureus 209P-A9497, S. aureus (echinomycin-resistant) A9628, Streptococcus faecalis A96 1 1, Escherichia coli A151 19 and E. coli (actinomycin-sensitive) A21780 (AS-19), respectively^[1].
Sandramycin inhibits cancer cells growth of L1210, B16, HCT118, RPMI8226, A431, RKO, SU-DHL6 and SU-DHL10 cells with IC₅₀ values of 0.02 nM, 0.07 nM, 0.8 nM, 3.8 nM, 3.1 nM, 1.3 nM, 5.9 nM and 3.3 nM, respectively^[2]. In Vivo: Sandramycin (0.0125-1.6?mg/kg; intraperitoneal injection; daily; for 5 days; CDF1 female mice) treatment shows moderately active in vivo against leukemia P388 in mice^[1].