Plitidepsin (intraperitoneal injection; 0.3 mg/kg or 1 mg/kg; 2 hours before infection with SARS-CoV-2) significantly reduces SARS-CoV-2 infection in BALB/c mice expressing human ACE2. 0.3 mg/kg plitidepsin group results in a reduction of nearly 2 log units in SARS-CoV-2 viral titers in the lungs, and the 1 mg/kg group leads to a reduction of 1.5 log units relative to the vehicle control group[2]. Animal Model: BALB/c mice[1] Dosage: 0.3 mg/kg; 1 mg/kg Administration: 1 day QD at 1 mg/kg; 3days QD at 0.3 mg/kg Result: Showed in vivo antiviral efficacy in mouse models of SARS-CoV-2 infection.
In Vitro
Aplidine (20 nM; 1 h) induces a dose-dependent decrease in VEGF secretion in MOLT-4 cells[1]. Aplidine (20 nM; 1 h) does not result in significant inhibition of VEGF-R1 mRNA in normal endothelial cells, which do express VEGFR-1 but do not secrete VEGF[1]. Aplidine inhibits SARS-CoV-2 with an IC90 of 1.76 nM. In hACE2-293T cells, Aplidine exhibits anti–SARS-CoV-2 activity with an IC90 of 0.88 nM. In an established model of human pneumocyte-like cells, Aplidine inhibits SARS-CoV-2 replication with an IC90 of 3.14 nM and a selectivity index of 40.4[1].
Kinase Assay
Cell Assay
Animal Administration
References
[1]. Alejandro Losada, et al. Translation Elongation Factor eEF1A2 is a Novel Anticancer Target for the Marine Natural Product Plitidepsin. Sci Rep. 2016 Oct 7;6:35100.
[2]. Kris M White, et al. Plitidepsin has potent preclinical efficacy against SARS-CoV-2 by targeting the host protein eEF1A. Science. 2021 Feb 26;371(6532):926-931.
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