5.30154

BMI-1 Expression Inhibitor, PTC-209

• Synonym(s): BMI-1 Expression Inhibitor, PTC-209, FLVI2/BMI1 Expression Inhibitor, MGC12685 Expression Inhibitor, PCGF4 Expression Inhibitor, PTC209; RNF51 Expression Inhibitor
• Empirical Formula (Hill Notation): C₁₇H₁₃Br₂N₅OS
• CAS Number: 315704-66-6
• Molecular Weight: 495.19
• MDL number: MFCD02110649
• UNSPSC Code: 12352200
• NACRES: NA.77

Properties

• Assay: ≥95% (HPLC)
• Quality Level: 100
• form: powder
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze; protect from light
• color: light yellow
• solubility: DMSO: 100 mg/mL
• storage temp.: 2-8°C
• InChI: 1S/C17H13Br2N5OS/c1-9-15(24-5-3-4-20-16(24)21-9)13-8-26-17(22-13)23-14-11(18)6-10(25-2)7-12(14)19/h3-8H,1-2H3,(H,22,23)
• InChI key: XVOOCQSWCCRVDY-UHFFFAOYSA-N

Description

General description

A cell-permeable imidazopyrimidinyl-thiazolamine compound that effectively downregulates cellular BMI-1 protein level both in cultures in vitro (IC₅₀ = 0.5 µM/48 h/HT1080 and <0.37 µM/HCT116/overnight) and in mice in vivo (4.5 ng vs.13.7 ng per mg HT1080 tumor tissue, respectively, with or without 10-d 60 mg/kg/d treatment via s.c.) by inhibiting BMI-1 transcription (IC₅₀ = 0.5 µM against overnight reporter transcription in HEK293) via a yet unidentified mechanism, thereby reducing BMI-1-dependent RING1A E3 ligase activity and RING1A-mediated H2A ubiquitination (uH2A)/epigenetic regulations. Shown to exhibit antiproliferation activity against human colon cancer cells both in cultures (IC₅₀<300 nM against LS174T and primary colon cancer cultures) in vitro and in mice (30 to 60 mg/kg/d s.c.) in vivo by inducing cell cycle arrest at G₀ and apoptosis. Reduced frequency of sphere-forming cells is observed among surviving cells (by 1.7- to 2.2-fold) upon PTC-209 removal post a 4-day 0.1 µM drug treatment period in primary colon cancer cultures, indicating a greater impact of drug treatment on self-renewing cancer-initiating cells (CICs; cancer stem cells). Likewise, surviving colon cancer cells from tumor-bearing mice at the end of drug treatment are shown to contain reduced population of tumor-initiating cells when xenografted into secondary recipient mice.

A cell-permeable imidazopyrimidinyl-thiazolamine compound that effectively downregulates cellular BMI-1 protein level both in cultures in vitro (IC₅₀ = 0.5 µM/48 h/HT1080 and <0.37 µM/HCT116/overnight) and in mice in vivo (60 mg/kg/d via s.c.) by inhibiting BMI-1 transcription via a yet unidentified mechanism, thereby reducing BMI-1-dependent RING1A E3 ligase activity and RING1A-mediated H2A ubiquitination (uH2A)/epigenetic regulations. Shown to exhibit antiproliferation activity against human colon cancer cells both in cultures (IC₅₀<300 nM) in vitro and in mice (30 to 60 mg/kg/d s.c.) in vivo via G0 cell cycle arrest and apoptosis induction with a greater drug impact on self-renewing cancer-initiating cells (CICs; cancer stem cells).

Biochem/physiol Actions

Cell permeable: yes

Reversible: no

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C.

Other Notes

Kreso, A., et al. 2014. Nat. Med.20, 29.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable