Synonym: Calpain inhibitor-1
MG-101 is an inhibitor of Calpain 1 (Ki = 190 nM), Calpain 2 (Ki = 220 nM), cathepsin B (Ki = 150 nM), and cathepsin L (Ki = 500 pM). It inhibits neutral cysteine proteases and proteasome (Ki = 6 μM). It inhibits apoptosis in thymocytes and metamyelocytes. MG-101 also inhibits cell cycle progression at the G1/S border and metaphase/anaphase in CHO cells by inhibiting cyclin B degradation. MG-101 inhibits the proteolysis of IκBα and IκBβ by the ubiquitin-proteasome complex. Furthermore, it protects against neuronal damage caused by hypoxia and ischemia. MG-101 also prevents nitric oxide production by activated macrophages by interfering with transcription of the inducible nitric oxide synthase gene.
|Cell lines||HCT116，HCT116/p53−/−，和 HCT116/Bax−/−|
|Preparation method||Cells viability is assayed using Cell Counting Kit-8 following manufacturer’s protocol. All HCT116 cell typesare seeded into each well of 96-well plate, cultured to 80% density and treated with different doses of ALLN for 24 h. Medium is then replaced by 100 μl fresh McCoy’s 5A complete medium with 10% CCK-8 reagent and incubated for 1 h. Absorbance is measured at 450 nm using a microplate reader. Results are shown as death percentages.|
|Animal models||Female athymic nude mice bearing HCT116 xenografts|
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.
|Solubility||76mg/ml in DMSO|
ALLN hinders HCT116 tumor growth through Bax-dependent apoptosis.
Li SZ, et al. Biochem Biophys Res Commun. 2013 Jul 26;437(2):325-30. PMID: 23831472.
Cysteine proteinase inhibitors and ras gene products share the same biological activities including transforming activity toward NIH3T3 mouse fibroblasts and the differentiation-inducing activity toward PC12 rat pheochromocytoma cells.
Hiwasa, et al. Carcinogenesis. 1990 Jan;11(1):75-80. PMID: 2403861.
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