S130 is a high affinity, selective inhibitor of ATG4B (a major cysteine protease) with an IC50 of 3.24 µM. S130 suppresses autophagy flux.
IC50&Target
IC50: 3.24 µM (ATG4B)
体外研究
S130 suppresses autophagy and activates apoptosis by inhibiting ATG4B, leads to enhanced cytotoxicity.
S130 (10 μM; 6 hours) suppresses autophagy at the early LC3 priming step or late autolysosome degradation stage.
S130 accumulates autolysosomes with more lipidated LC3.
S130 (0-25 μM; 48 hours) induces cell death through inhibiting the activity of ATG4B at a dose higher than 6.3 µM. And such cytotoxicity might not cause cell death through necroptosis.
Nutrient deprivation enhances S130-induced cytotoxicity.
S130 (0-10μM; 24 hours) suppresses approximately 79% of the cleavage of full-length LC3-GST at the 10 µM, while no substrates were processed in ATG4B KO cells. S130 displays obvious inhibitory effects on ATG4B.
Cell Cytotoxicity Assay
Cell Line:
HeLa cells, HCT116 cells, HL60 cells
Concentration:
0 μM, 3.1 μM, 6.3 μM, 12.5 μM, 25 μM
Incubation Time:
48 hours
Result:
Had significant cytotoxic effects on HeLa cells (IC50 =16.1 µM), HCT116 cells(IC50 =9.0 µM) and HL60 cells (IC50 =4.7 µM) at a dose higher than 6.3 µM. And such cytotoxicity might not cause cell death through necroptosis.
Cell Autophagy Assay
Cell Line:
HeLa cells and MEF cells
Concentration:
10 μM
Incubation Time:
6 hours
Result:
Suppressed autophagy at the early LC3 priming step or late autolysosome degradation stage.
Western Blot Analysis
Cell Line:
HeLa cells
Concentration:
0 μM, 5 μM, 10 μM
Incubation Time:
24 hours
Result:
Suppressed approximately 79% of the cleavage of full-length LC3-GST at 10 µM, while no substrates were processed in ATG4B KO cells.
体内研究
S130 (20 mg/kg; i.p.; daily; 3 weeks) suppresses tumor growth, and shows an efficient in vivo antitumor effect with a sound safety on vital organs.
Animal Model:
BALB/c nude female mice (4 weeks), with HCT116 cells xenograft
Dosage:
20 mg/kg
Administration:
Intraperitoneal injection; daily; 3 weeks
Result:
Was able to suppress tumor growth and with a sound safety on vital organs.
分子式
C24H25N3O2
分子量
387.47
CAS号
1160852-22-1
运输条件
Room temperature in continental US; may vary elsewhere.