DIDESMETHYLROCAGLAMIDE

Eukaryotic initiation factor 4A (eIF4A)

Didesmethylrocaglamide (5 nM, and 10 nM; 72 hours; MPNST cells) treatment arrests MPNST cells at G2-M, increases the sub-G1 population, induces cleavage of caspases and PARP, and elevates the levels of the DNA-damage response marker γH2A.X, while decreasing the expression of AKT and ERK1/2.
Didesmethylrocaglamide inhibits MPNST cell proliferation by inducing cell cycle arrest at G2/M and subsequently, cell death. Didesmethylrocaglamide-treated 697-R cells exhibits IC ₅₀ values is very similar to those of parental 697 cells (4 vs 3nM of IC ₅₀ , respectively).
Didesmethylrocaglamide induces apoptosis in both neurofibromatosis type 1 (NF1)-expressing and NF1-deficient MPNST cells, possibly subsequent to the activation of the DNA damage response. Didesmethylrocaglamide-treated sarcoma cells show decreased levels of multiple oncogenic kinases, including insulin-like growth factor-1 receptor.