Eeyarestatin I, a potent endoplasmic reticulum-associated protein degradation (ERAD) inhibitor, is a potent protein translocation inhibitor. It disturbs endoplasmic reticulum (ER) homeostasis and has anticancer activities resembling that of Bortezomib. Eeyarestatin I inhibits Sec61 translocon[1].
Eeyarestatin I (8μM; 1h) modulates protein processing at the ER of cultured mammalian cells, when cells were incubated with 8μM Eeyarestatin I, an almost complete loss of secretory glycoproteins in the media was observed[2]. Eeyarestatin I (0.2-5μM; 4h) abolishes both Zika virus and Usutu virus infectivity in a dose-and time-dependent manner, in agreement with an antiviral activity occurring directly upon the viral particles[3]. Eeyarestatin I (10μM; 24h) abrogates TGF-β1-triggered Klotho reduction in cultured HK-2 cells[4].
Eeyarestatin I (2.5mg/kg; ip, 10d) upregulates renal Klotho protein expression, as well as sKlotho levels , without significantly altering Klotho mRNA level[4]. Inhibition of Valosin-containing protein's function by Eeyarestatin I (50µg/each; sc; 2 times) reduces tumor growth in NSCLC-xenograft model[5].
References:
[1] Cross B C S, McKibbin C, Callan A C, et al. Eeyarestatin I inhibits Sec61-mediated protein translocation at the endoplasmic reticulum[J]. Journal of cell science, 2009, 122(23): 4393-4400.
[2]. Cross B C S, McKibbin C, Callan A C, et al. Eeyarestatin I inhibits Sec61-mediated protein translocation at the endoplasmic reticulum[J]. Journal of cell science, 2009, 122(23): 4393-4400.
[3]Rodrigo I, Ballesta C, Nunes E B, et al. Eeyarestatin I, an inhibitor of the valosin-containing protein, exhibits potent virucidal activity against the flaviviruses[J]. Antiviral Research, 2022, 207: 105416.
[4]. Li S S, Kong J W, Yu L X, et al. Abnormally decreased renal Klotho is linked to endoplasmic reticulum-associated degradation in mice[J]. International Journal of Medical Sciences, 2022, 19(2): 321.
[5].Valle C W, Min T, Bodas M, et al. Critical role of VCP/p97 in the pathogenesis and progression of non-small cell lung carcinoma[J]. PloS one, 2011, 6(12): e29073.
















