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RA-9

Cat. No. M8473
RA-9 Structure
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Biological Activity

RA-9 is a cell permeable and potent inhibitor of the ubiquitin-proteasome system (UPS) that targets deubiquitinating enzymes (DUB) without affecting 20S proteasome catalytic-core activity. RA-9 directly inhibits activity of following DUB UCH-L1, UCH-L3, USP2, USP5 and USP8 deubiquitinating enzymes, which results in rapid accumulation of poly-ubiquitinated proteins leading to cell cycle checkpoint arrest and tumor cell apoptosis.

Chemical Information
Molecular Weight 365.34
Formula C19H15N3O5
CAS Number 919091-63-7
Solubility (25°C) DMSO: 2 mg/mL (warmed)
Storage Powder          -20°C   3 years ;  4°C   2 years
In solvent       -80°C   6 months ;  -20°C   1 month
Conversion of different model animals based on BSA (PMID: 27057123)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 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 Compound A of 10 mg/kg.

References

[1] Donatella Treppiedi, et al. USP8 inhibitor RA-9 reduces ACTH release and cell growth in tumor corticotrophs

[2] Katie Wan Yee Yeung, et al. Current understanding of potential ecological risks of retinoic acids and their metabolites in aquatic environments

[3] Charlotte J C Edwards-Gayle, et al. Self-Assembly, Antimicrobial Activity, and Membrane Interactions of Arginine-Capped Peptide Bola-Amphiphiles

[4] Mayako Fujihara, et al. Retinoic acid promotes in vitro follicle activation in the cat ovary by regulating expression of matrix metalloproteinase 9

[5] Kathleen Coughlin, et al. Small-molecule RA-9 inhibits proteasome-associated DUBs and ovarian cancer in vitro and in vivo via exacerbating unfolded protein responses

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