Volasertib (BI 6727) trihydrochloride is an orally active, highly potent and ATP-competitive Polo-like kinase 1 ( PLK1 ) inhibitor with an IC50 of 0.87 nM. Volasertib trihydrochloride inhibits PLK2 and PLK3 with IC50 s of 5 and 56 nM, respectively. Volasertib trihydrochloride induces mitotic arrest and apoptosis. Volasertib trihydrochloride, a dihydropteridinone derivative, shows marked antitumor activity in multiple cancer models [1] [2].
In Vivo, Volasertib trihydrochloride (BI 6727 trihydrochloride; A total weekly dose of 50 mg/kg; Oral; once a week, twice a week, or daily; for 40 days) shows comparable efficacy in human colon carcinoma xenograft models[1]. Volasertib trihydrochloride (15, 20, or 25 mg/kg/day; i.v.; 2 consecutive days per week; for 40 days) leads to significant tumor growth delay and even tumor regression in human colon carcinoma xenograft models [1]. Volasertib trihydrochloride (70 mg/kg given once weekly or 10 mg/kg daily; oral) significantly delays tumor growth in a non-small cell lung carcinoma xenograft model derived from NCI-H460 cells[1]. Volasertib (a single dose of 40 mg/kg; iv) causes a significant (13-fold) increase in mitotic cells in HCT 116 tumor-bearing nude mice[1]. Volasertib has high volume of distribution and a long terminal half-life in mice (Vss=7.6 L/kg, t1/2=46 h) and rats (Vss=22 L/kg, t1/2=54 h)[1].
In Vitro, Volasertib trihydrochloride (BI 6727 trihydrochloride; 0.01-10000 nM; 72 hours) has EC50 values of 11 to 37 nmol/L in multiple cell lines[1]. Volasertib trihydrochloride (10-1000 nM; 24 hours) results accumulation of cells with 4N DNA content, indicative of a cell cycle block in G2-M phase[1]. Volasertib trihydrochloride (100 nM; 24-72 hours) induces cell apoptosis at 48 hours[1].
References:
[1]. Xie FF, et al. Volasertib suppresses tumor growth in cervical cancer. Am J Cancer Res. 2015 Nov 15;5(12):3548-59.
[2]. Rudolph D, et al. BI 6727, a Polo-like kinase inhibitor with improved pharmacokinetic profile and broad antitumor activity.Clin Cancer Res. 2009 May 1;15(9):3094-102. Epub
In Vivo, Volasertib trihydrochloride (BI 6727 trihydrochloride; A total weekly dose of 50 mg/kg; Oral; once a week, twice a week, or daily; for 40 days) shows comparable efficacy in human colon carcinoma xenograft models[1]. Volasertib trihydrochloride (15, 20, or 25 mg/kg/day; i.v.; 2 consecutive days per week; for 40 days) leads to significant tumor growth delay and even tumor regression in human colon carcinoma xenograft models [1]. Volasertib trihydrochloride (70 mg/kg given once weekly or 10 mg/kg daily; oral) significantly delays tumor growth in a non-small cell lung carcinoma xenograft model derived from NCI-H460 cells[1]. Volasertib (a single dose of 40 mg/kg; iv) causes a significant (13-fold) increase in mitotic cells in HCT 116 tumor-bearing nude mice[1]. Volasertib has high volume of distribution and a long terminal half-life in mice (Vss=7.6 L/kg, t1/2=46 h) and rats (Vss=22 L/kg, t1/2=54 h)[1].
In Vitro, Volasertib trihydrochloride (BI 6727 trihydrochloride; 0.01-10000 nM; 72 hours) has EC50 values of 11 to 37 nmol/L in multiple cell lines[1]. Volasertib trihydrochloride (10-1000 nM; 24 hours) results accumulation of cells with 4N DNA content, indicative of a cell cycle block in G2-M phase[1]. Volasertib trihydrochloride (100 nM; 24-72 hours) induces cell apoptosis at 48 hours[1].
References:
[1]. Xie FF, et al. Volasertib suppresses tumor growth in cervical cancer. Am J Cancer Res. 2015 Nov 15;5(12):3548-59.
[2]. Rudolph D, et al. BI 6727, a Polo-like kinase inhibitor with improved pharmacokinetic profile and broad antitumor activity.Clin Cancer Res. 2009 May 1;15(9):3094-102. Epub