Chemical Structure : RBPMS inhibitor RB98
CAS No.: 1206152-89-7
Catalog No.: PC-26673Not For Human Use, Lab Use Only.
RBPMS inhibitor RB98 is a specific small-molecule inhibitor of RNA binding protein with multiple splicing (RBPMS) with SPR KD of 402 nM, exhibits competitive inhibition of FOXO1 mRNA-RBPMS binding with IC50 of 3.1 uM in fluorescence polarization (FP) assays.
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RBPMS inhibitor RB98 is a specific small-molecule inhibitor of RNA binding protein with multiple splicing (RBPMS) with SPR KD of 402 nM, exhibits competitive inhibition of FOXO1 mRNA-RBPMS binding with IC50 of 3.1 uM in fluorescence polarization (FP) assays.
RB98 treatment of leukemia cells resulted in down-regulation of FOXO1 expression, alongside an enrichment of FOXO1 transcripts associated with RBPMS.
RB98 inhibited the proliferation and promoted the apoptosis of leukemia cells.
RB98 treatment resulted in a decrease in the FOXO1 mRNA abundance in polysomes, induced apoptosis in cells and diminished the colony-forming ability of primary AML cells.
RB98 reduced the leukemic burden in RUNX1-ETO9a–driven AML models.
| M.Wt | 470.56 | |
| Formula | C22H22N4O4S2 | |
| Appearance | Solid | |
| Storage |
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| Solubility |
10 mM in DMSO |
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| Chemical Name/SMILES |
4,4'-bis((2-ethyl-1H-imidazol-1-yl)sulfonyl)-1,1'-biphenyl |
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1. Liu P, et al. Sci Transl Med. 2026 May 6;18(848):eadv8951.

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