Ryuvidine is a potent inhibitor of SET domain-containing protein 8(SETD8) with an IC50 value of 0.5µM [1]. Ryuvidine can strongly inhibit the activity of KDM5A (IC50=1.4μM) and block H3K4me3 demethylation [2]. Ryuvidine has been widely used to stabilize the Uhrf1 protein and to alleviate arthritis in mice [3].
In vitro, Ryuvidine treatment for 72 hours significantly inhibited the proliferation of HPV-negative Cal33 cells, and SCC15 cells, with IC50 values of 1.38μM and 1.17μM, respectively [4]. Treatment with 20μM Ryuvidine for 2 hours significantly induced phosphorylation of the CHK2 kinase at the threonine 68 site in HeLa cells, decreased the level of CDC7 and blocked DNA synthesis[5]. Treatment with 5μM Ryuvidine for 48 hours significantly inhibited apoptosis in human red blood cells after chloride ion removal, and reduced the exposure of phosphatidylserine (PS) on the cell membrane[6].
In vivo, Ryuvidine treatment via intraperitoneal injection at a dose of 0.8μg/g for 4 times within 5 days significantly alleviated the exacerbation of the arthritis phenotype in K/BxN serum transfer arthritis (STA) mice and reduced the serum Ccl20 level[7].
References:
[1] Blum G, Ibáñez G, Rao X, et al. Small-molecule inhibitors of SETD8 with cellular activity[J]. ACS chemical biology, 2014, 9(11): 2471-2478.
[2] Mitsui E, Yoshida S, Shinoda Y, et al. Identification of ryuvidine as a KDM5A inhibitor[J]. Scientific Reports, 2019, 9(1): 9952.
[3] Saeki N, Inoue K I, Ideta-Otsuka M I O, et al. Stabilization of UHRF1 in synovial fibroblasts is a novel therapeutic strategy for rheumatoid arthritis[J]. Bone Reports, 2022, 16: 101575.
[4] Ghasemi F, Black M, Sun R X, et al. High-throughput testing in head and neck squamous cell carcinoma identifies agents with preferential activity in human papillomavirus-positive or negative cell lines[J]. Oncotarget, 2018, 9(40): 26064.
[5] FitzGerald J, Murillo L S, O'Brien G, et al. A high through-put screen for small molecules modulating MCM2 phosphorylation identifies Ryuvidine as an inducer of the DNA damage response[J]. PLoS One, 2014, 9(6): e98891.
[6] Lang E, Zelenak C, Eberhard M, et al. Impact of cyclin-dependent kinase CDK4 inhibition on eryptosis[J]. Cellular physiology and biochemistry, 2015, 37(3): 1178-1186.
[7] Saeki N, Inoue K, Ideta-Otsuka M, et al. Epigenetic regulator UHRF1 orchestrates proinflammatory gene expression in rheumatoid arthritis in a suppressive manner[J]. The Journal of Clinical Investigation, 2022, 132(11).
















