Cirtuvivint is an orally bioavailable CDC-like kinase (CLK) inhibitor with anti-tumor activity[1, 2]. Cirtuvivint is a potent transcriptional regulator and splicing modulator, showing promise for the treatment of various advanced solid tumors[3]. Cirtuvivint inhibits Ewing sarcoma (ES) growth by suppressing EWS-FLI-1 expression and inducing alternative EWS-FLI1 splicing variants[4].
In vitro, treatment of SW480 cells with Cirtuvivint (0.03μM–3μM) for 48h induced apoptosis and significantly increased the levels of activated caspase 3/7[5].
In vivo, Cirtuvivint (12.5mg/kg) administered orally inhibited tumor growth in a mouse model of endometrial cancer, and its efficacy was enhanced when combined with paclitaxel[6]. Cirtuvivint (12.5, 25mg/kg) administered orally significantly inhibited tumor growth and induced tumor regression in a mouse model of ovarian cancer[7].
References:
[1] Govindharajulu J P, Dougherty K, Miner T, et al. Pharmacodynamics of venetoclax plus cirtuvivint a first-in-class splice variant regulator[J]. 2024.
[2] Teicher B A, Dexheimer T S, Silvers T, et al. RNA processing kinase inhibitors and epigenetic inhibitors in combination with oncology drugs or investigational agents in multi-cell type patient-derived tumor cell line spheroids[J]. Cancer Chemotherapy and Pharmacology, 2025, 95(1): 1-22.
[3] Dexheimer T S, Silvers T, Coussens N P, et al. Combinations of Cdc-like kinase (CLK) inhibitors with targeted oncology agents or standard chemotherapy in patient-derived multi-cell type tumor spheroids[J]. Cancer Research, 2024, 84(6_Supplement): 4608-4608.
[4] Vatolin S, Schwartz G K. Cirtuvivint inhibits Ewing sarcoma (ES) growth by suppressing EWS-FLI-1 expression and inducing alternate EWS-FLI1 splice variants[J]. Cancer Research, 2025, 85(8_Supplement_1): 4272-4272.
[5] Tam B Y, Chiu K, Chung H, et al. The CLK inhibitor SM08502 induces anti-tumor activity and reduces Wnt pathway gene expression in gastrointestinal cancer models[J]. Cancer letters, 2020, 473: 186-197.
[6] Corr B R, Moroney M R, Woodruff E, et al. Combination CDC-like kinase inhibition (CLK)/Dual-specificity tyrosine-regulated kinase (DYRK) and taxane therapy in CTNNB1-mutated endometrial cancer[J]. bioRxiv, 2023.
[7] Chung H, Sitts L, Creger E, et al. Abstract A09: SM08502, a novel, small-molecule CDC-like kinase (CLK) inhibitor, demonstrates strong inhibition of the Wnt signaling pathway and antitumor effects in diverse ovarian cancer models[J]. Clinical Cancer Research, 2020, 26(13_Supplement): A09-A09.
Cirtuvivint是一种口服有效的CDC样激酶(CLK)抑制剂,具有抗肿瘤活性[1, 2]。Cirtuvivint是一种强效的转录调节和剪接修饰剂,能够用于治疗多种晚期实体瘤[3]。Cirtuvivint能够通过抑制 EWS-FLI-1表达和诱导替代EWS-FLI1剪接变体来抑制Ewing肉瘤(ES)生长[4]。
在体外,Cirtuvivint(0.03μM-3μM)处理SW480细胞48h,诱导了细胞凋亡,显著升高了细胞内激活的caspase 3/7水平[5]。
在体内,Cirtuvivint(12.5mg/kg)通过口服治疗子宫内膜癌模型小鼠,抑制了肿瘤的生长,Cirtuvivint与紫杉醇联合使用的疗效更好[6]。Cirtuvivint(12.5, 25mg/kg)通过口服治疗卵巢癌模型小鼠,显著抑制了肿瘤生长,引起了肿瘤消退[7]。
















