Phase 1-2 open-label, multiple-dose, dose-escalation study to evaluate the safety and tolerability of intravenous infusion of SNS01-T, a first-in-class modulator of eukaryotic translation initiation factor 5A (eIF5A) in patients (pts) with relapsed or refractory B-cell malignancies.

TPS8616 Background: eIF5A has been implicated in the regulation of cell proliferation, apoptosis, and inflammation. It is the only known protein to be modified by hypusination, and is highly conserved across species and is active in plants and animals. Hypusinated eIF5A, the predominant form in normal and cancer cells, is involved in cell survival and inflammatory pathway activation. siRNAs targeting eIF5A inhibit NF-kB activation and reduce pro-inflammatory cytokine production. Accumulation of the unhypusinated lysine form of eIF5A is associated with apoptosis. Mutants of eIF5A that cannot be hypusinated (e.g. eIF5AK50R) are pro-apoptotic in vitro and have anti-tumoral activity in vivo in multiple cancer types including melanoma and lung cancer. SNS01-T is a novel therapeutic with a dual mechanism of eIF5A modulation: inducing cell death via siRNA-mediated inhibition of hypusinated eIF5A while simultaneously causing over-expression of pro-apoptotic eIF5AK50R via a DNA plasmid with a B-cell promoter to in...