SH-BC-893 is a water-soluble, orally bioavailable synthetic sphingolipid that triggers nutrient transporter internalization and also blocks lysosome-dependent nutrient generation pathways in cancer cells, activates protein phosphatase 2A (PP2A), leading to mislocalization of the lipid kinase PIKfyve; selectively kills cells expressing an activated form of the anabolic oncogene Ras in vitro and in vivo.SH-BC-893, increases the activity of antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs) up to 200-fold in vitro without permeabilizing endosomes. SH-BC-893 treatment trapped endocytosed oligonucleotides within extra-lysosomal compartments thought to be more permeable due to frequent membrane fission and fusion events. Simultaneous disruption of ARF6-dependent endocytic recycling and PIKfyve-dependent lysosomal fusion was necessary and sufficient for SH-BC-893 to increase non-lysosomal oligonucleotide levels and enhance their activity. In mice, oral administration of SH-BC-893 increased ASO potency in the liver by 15-fold without toxicity. More importantly, SH-BC-893 enabled target RNA knockdown in the CNS and lungs of mice treated subcutaneously with cholesterol-functionalized duplexed oligonucleotides or unmodified ASOs, respectively. Together, these results establish the feasibility of using a small molecule that disrupts endolysosomal trafficking to improve the activity of oligonucleotides in extrahepatic tissues.
Cat.No
DC12399
Name
SH-BC-893
Chemical Properties
CAS
1841409-92-4
Formula
C19H32CLNO
MW
325.916484832764
Storage
2 years -20°C Powder, 2 weeks 4°C in DMSO, 6 months -80°C in DMSO
References
Simultaneous inhibition of endocytic recycling and lysosomal fusion sensitizes cells and tissues to oligonucleotide therapeutics-February 2023 Nucleic Acids Research
DOI:10.1093/nar/gkad023
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