Trilaciclib (G1T28) is a potent first-in-class reversible CDK4/6 inhibitor with IC50 of 1 nM and 4 nM for CDK4/cyclin D1 and CDK6/cyclin D3, respectively. Trilaciclib (G1T28) protects RB competent cells from damage by chemotherapy as assessed by gamma-H2A.X (γH2AX) and apoptosis through caspase 3/7 activation in vitro and in vivo. In vivo, G1T28 regulates the proliferation of HSPCs in both mouse and canine bone marrow, in a reversible, doseand time-dependent manner.
Cell Experiment | |
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Cell lines | HS68 cells, WM2664 cells, A2058 cells |
Preparation method | HS68, WM2664 and A2058 cells are treated with 300 nM G1T28 or DMSO (0.1%), for 4, 8, 16 or 24 hours. Whole cell extracts are prepared using 1× radioimmunoprecipitation assay buffer (RIPA) containing 1× HALT protease and phosphatase inhibitors. Total protein concentration is determined by using the bicinchoninic acid (BCA) Protein Assay Kit, according to manufacturer's instructions. Fifteen micrograms of protein is heat denatured for 10 minutes at 70 ℃ and resolved by Novex NuPAGE SDS-PAGE gel system and transferred to 0.45 μm nitrocellulose membrane by electroblotting. |
Concentrations | 10 nM, 30 nM, 100 nM, 300 nM, 1000 nM |
Incubation time | 4 h, 8 h, 16 h, 24 h |
Animal Experiment | |
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Animal models | 8-week-old female FVB mice |
Formulation | 20% Solutol |
Dosages | 50 mg/kg, 100 mg/kg, 150 mg/kg |
Administration | oral gavage |
Molecular Weight | 446.55 |
Formula | C24H30N8O |
CAS Number | 1374743-00-6 |
Solubility (25°C) | Slightly soluble in water Slightly soluble in DMSO |
Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
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